Journal articles: 'Percutaneous implants'

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Wade, Phillip S., Jerry J. Halik, and Marshall Chasin. "Bone Conduction Implants: Transcutaneous vs. Percutaneous." Otolaryngology–Head and Neck Surgery 106, no. 1 (January 1992): 68–74. http://dx.doi.org/10.1177/019459989210600130.

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Clinical experience with transcutaneous bone conduction implants has demonstrated that they are most beneficial for patients with purely conductive hearing loss in at least one ear. Percutaneous bone conduction implants, however, have been reported to provide adequate benefit for patients with mixed hearing loss with bone conduction pure-tone averages up to 45 db hl (Tjellstrom, 1989). The results of 24 Xomed Audiant osseointegrated bone conduction hearing devices (including a clinical trial on two patients using a new, larger magnet [Neodynium Iron Boron]), plus the results of eleven patients implanted and fitted with the percutaneous bone-anchored hearing aid are reported. Aided results with these devices will be presented. In addition, general comparisons of benefit obtained with the two devices will be made for patients who exhibit similar hearing losses. Finally, a direct comparison will be made on two patients who have undergone both implant procedures.

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Theil, Jacob H., Jennifer L. Johns, Poyin Chen, David M. Theil, and Megan A. Albertelli. "Hematology and Culture Assessment of Cranially Implanted Rhesus Macaques (Macaca mulatta)." Comparative Medicine 71, no. 2 (April 1, 2021): 166–76. http://dx.doi.org/10.30802/aalas-cm-20-000084.

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The use of percutaneous cranial implants in rhesus macaques (Macaca mulatta) has long been a valuable tool for neuroscience research. However, when treating and assessing these animals, veterinarians are required to make assumptions about diagnostic results due to a lack of research into how these implants affect physiology. Microbial cultures of cranial implant sites show an abundance of colonizing bacteria, but whether these microbes affect animal health and wellbeing is poorly understood. In addition, microbial antibiotic resistance can present significant health concerns for both the animals and the researchers. To help elucidate the relationship between percutaneous cranial implants and blood parameters, complete blood cell counts and serum chemistry results were assessed on 57 nonhuman primates at our institution from September 2001 to March 2017. Generalized estimating equations were used to compare the results before and after an animal's first implant surgery. This modelling showed that cranial implants were a significant predictor of alterations in the number of neutrophils, lymphocytes, and red blood cells, and in the concentration of hemoglobin, alkaline phosphatase, creatinine, calcium, phos- phorus, total protein, albumin, and globulin. Anaerobic and aerobic bacterial cultures were performed to identify bacteria associated with cranial implants. Staphylococcus spp., Streptococcus spp., and Corynebacterium spp. comprised the majority of the aerobic bacterial isolates, while Fusobacterium spp., Peptostreptococcus spp. and Bacterioides fragilis comprised the majority of anaerobic bacterial isolates. Using a Pearson r correlation for statistical analysis, we assessed whether any of these bacterial isolates developed antibiotic resistances over time. Cefazolin, the most frequently used antibiotic in monkeys in this study, was the only antimicrobial out of 41 agents tested to which bacteria developed resistance over time. These results indicate that percutaneous implants are associated with a generalized inflammatory state, multiple bacterial species are present at the implant site, and these bacteria may contribute to the inflammatory response.

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Parkin, James L., and Matthew J. Parkin. "Multichannel Cochlear Implantation with Percutaneous Pedestal." Ear, Nose & Throat Journal 73, no. 3 (March 1994): 156–64. http://dx.doi.org/10.1177/014556139407300308.

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In a prospective study by Cohen et al,3 the superiority of multi channel cochlear implant patient performance over single-channel cochlear implant performance was demonstrated. The Ineraid system described in this paper includes a percutaneous pedestal which has had a satisfactory patient experience. Only one pedestal removal has been necessary because of specific pedestal problems. Other less serious pedestal problems decrease in frequency with increasing time post-implantation. The auditory performance indicates significant commu nication skills improvement in patients with multichannel cochlear implants.

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Mylanus, E. A. M., and C. W. R. J. Cremers. "A one-stage surgical procedure for placement of percutaneous implants for the bone-anchored hearing aid." Journal of Laryngology & Otology 108, no. 12 (December 1994): 1031–35. http://dx.doi.org/10.1017/s002221510012883x.

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AbstractThe bone-anchored hearing aid (BAHA) is an alternative to the conventional bone conduction hearing aid. The transducer is coupled to a percutaneous titanium implant which is traditionally inserted into the temporal bone in two stages. This study focusses on a one-stage surgical technique for the implantation of percutaneous implants. The preliminary clinical results of 33 one-stage implants in 33 patients are presented.Post-operative necrosis of the skin grafts did not occur. After a follow-up which varied from nine to 25 months, 31 out of the 33 fixtures (94 per cent) were anchored firmly in the skull. Twenty-six out of the 33 implants (79 per cent) remained free from potentially dangerous skin reactions. The results were statistically comparable to those obtained with two-stage implants at the same clinic. Although longer follow-up is needed before a general statement can be made about replacing the two-stage technique, the preliminary one-stage results are promising.

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Heimke, G�nther. "Biomaterials highlights VIII. Percutaneous implants." Advanced Materials 3, no. 2 (February 1991): 108–10. http://dx.doi.org/10.1002/adma.19910030210.

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Winnen, Rolf G., Kristian Kniha, Ali Modabber, Faruk Al-Sibai, Andreas Braun, Reinhold Kneer, and Frank Hölzle. "Reversal of Osseointegration as a Novel Perspective for the Removal of Failed Dental Implants: A Review of Five Patented Methods." Materials 14, no. 24 (December 17, 2021): 7829. http://dx.doi.org/10.3390/ma14247829.

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Osseointegration is the basis of successful dental implantology and the foundation of cementless arthroplasty and the osseointegrated percutaneous prosthetic system. Osseointegration has been considered irreversible thus far. However, controlled heating or cooling of dental implants could selectively damage the bone at the bone–implant interface, causing the reversal of osseointegration or “osseodisintegration”. This review compares five methods for implant removal, published as patent documents between 2010 and 2018, which have not yet been discussed in the scientific literature. We describe these methods and evaluate their potential for reversing osseointegration. The five methods have several technical and methodological similarities: all methods include a handpiece, a connecting device for coronal access, and a controlling device, as well as the application of mechanical and/or thermal energy. The proposed method of quantifying the temperature with a sensor as the sole means for regulating the process seems inadequate. A database used in one of the methods, however, allows a more precise correlation between a selected implant and the energy needed for its removal, thus avoiding unnecessary trauma to the patient. A flapless, microinvasive, and bone-conserving approach for removing failed dental implants, facilitating successful reimplantation, would benefit dental implantology. These methods could be adapted to cementless medical implants and osseointegrated percutaneous prosthetics. However, for some of the methods discussed herein, further research may be necessary.

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Basciani MD, Reto M., and Balthasar Eberle. "Percutaneous aortic valve implants under sedation." Catheterization and Cardiovascular Interventions 74, no. 1 (July 1, 2009): 148–49. http://dx.doi.org/10.1002/ccd.22026.

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Di Dona, Francesco, Giovanni Della Valle, Barbara Lamagna, Caterina Balestriere, Carla Murino, Bruna Santangelo, Francesco Lamagna, and Gerardo Fatone. "Percutaneous transilial pinning for treatment of seventh lumbar vertebral body fracture." Veterinary and Comparative Orthopaedics and Traumatology 29, no. 02 (March 2016): 164–69. http://dx.doi.org/10.3415/vcot-15-01-0003.

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SummaryObjective: To evaluate outcomes after percutaneous application of transilial pinning in dogs with seventh lumbar vertebral body fracture with concurrent lumbosacral luxation.Methods: We reviewed the medical records of dogs with seventh lumbar vertebral body fracture stabilized with percutaneous transilial pinning that were treated at our hospital between January 2000 and March 2014. Radiographic measurements were used for comparing craniocaudal and ventrodorsal displacement pre- and postoperatively.Results: Seventeen dogs met the inclusion criteria. The neurological status of the majority of treated dogs improved quickly, with immediate pain reduction after surgery. Implants were well tolerated throughout the application period and were removed at a mean time of 54.4 ± 9.2 days. One dog experienced a major complication (implant failure) and required surgical revision a week after the initial procedure. Minor complications included pin-tract inflammation, signs of back pain lasting five weeks and acute lameness after implant removal. Postoperative radiographic measurements showed shortening of the vertebral body and residual dorsoventral dislocation. Otherwise, functional recovery was good (5 of 17 dogs) to excellent (10 of 17 dogs) in the majority of the patients.Clinical relevance: The use of two percutaneous transilial pins can be considered as treatment for the management of seventh lumbar fracture-luxation in dogs. Our modified stabilization technique is relatively easy to perform; less invasive on the soft tissues; and uses implants that are versatile, modifiable, and easily removable.

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Galambos, David Maxwell, Aliaksei Salei, Soroush Rais-Bahrami, and Rakesh K. Varma. "Intrahepatic renal cell carcinoma implantation along a percutaneous biopsy and cryoablation probe tract." BMJ Case Reports 15, no. 5 (May 2022): e248250. http://dx.doi.org/10.1136/bcr-2021-248250.

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A man in his 60s underwent percutaneous biopsy and cryoablation of a right upper pole clear cell renal cell carcinoma followed by repeat cryoablation 8 months later for possible residual disease. The patient was followed with imaging with documented stability for 19 months after repeat ablation. However, imaging at 32 months demonstrated intrahepatic nodular enhancing lesions along the initial percutaneous biopsy and ablation tract, consistent with metastatic implantation. The patient underwent repeat percutaneous biopsy and two rounds of microwave ablation for treatment of the intrahepatic implants, with no residual disease at 10 months postablation. While needle tract seeding is a known complication of percutaneous manipulation of various abdominopelvic malignancies, there have been no prior reports of intrahepatic metastatic implants related to percutaneous renal cell carcinoma ablation. Awareness of this potential complication is important for treatment planning, informed consent and surveillance. This report shares our experience of the management of intrahepatic metastatic implants.

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Kim, Jong T., Leonard M. Rudolf, and John A. Glaser. "Outcome of Percutaneous Sacroiliac Joint Fixation with Porous Plasma-Coated Triangular Titanium Implants: An Independent Review." Open Orthopaedics Journal 7, no. 1 (February 22, 2013): 51–56. http://dx.doi.org/10.2174/1874325001307010051.

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Design: Independent retrospective review of a single surgeon’s experience with a new technique of SI fixation. Objective: Examine results of percutaneous fixation of the SI joint with porous coated triangular titanium implants. Background: Diagnosis and treatment of a dysfunctional sacroiliac joint is challenging as well as controversial. Recently, percutaneous stabilization techniques have been implemented for fixation. There is minimal literature published on this technique. Methods: Charts, radiographs, and CT scans of 31 patients operated on by a single surgeon were de-identified and randomized and then reviewed by investigators not involved with the care of the patients. Reviewers had no relationship with the implant manufacturer at the time of the review. Outcome Measures: intraoperative and postoperative complication, EBL, hospital stays, postoperative image location and number of lucent implants, ingrowth into implants, and bone across SI joint. Results: 27 patients expressed satisfaction, 4 patients did not. Pain relief was noted to be Complete (16 patients), Excellent (5 patients), Good (9 patients), and Fair (1 patients). Four patients had postoperative complications. These were infected hematoma (2), L5 nerve root irritation (1), and L5-S1 discitis (1). One patient required revision. On 6 month postop CT scan, 18/19 patients had radiographic evidence of bone ingrowth and bone into or across the SI joint was evident in 8/19 patients. Lucency was noted around at least one implant in 5/19 patients. Conclusions: Results are promising for the use of this novel implant for a carefully selected group of patients with disabling SI dysfunction.

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Kim, David D. "Rates of Lead Migration and Stimulation Loss in Spinal Cord Stimulation: A Retrospective Comparison of Laminotomy Versus Percutaneous Implantation." Pain Physician 6;14, no. 6;12 (December 14, 2011): 513–24. http://dx.doi.org/10.36076/ppj.2011/14/513.

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Background: Neuromodulation has been used to treat neuropathic pain. Leads have been implanted using laminotomy or percutaneous approaches. Laminotomy implantation has been shown to be superior in terms of lead migration when compared to percutaneous implantation. Lead migration has been reported as high as 68% with the percutaneous approach. Because of this, newer anchors have been developed but not tested in vivo. Objectives: This study tests the hypothesis that newer anchoring systems have improved lead migration rates for percutaneous leads relative to laminotomy leads to the point of parity. This study also analyzed if factors such as laterality of symptoms, lead type, level of implant and diagnosis affect migration rates. Study Design: Neurostimulators implanted in the thoracolumbar spine at Henry Ford Hospital between 2006 and 2008 were reviewed for the following: age, sex, diagnosis, lead type, and implant level. Implants were reviewed for the following: age, sex, diagnosis, lead type, implant level, implant method, symptom laterality, loss of stimulation, radiographic lead migration, and time to loss. Loss of capture and lead migration in the laminotomy and percutaneous groups were compared using Fisher’s exact test. Variables within each group included: lead type, level of implantation, location of symptoms, and diagnosis. They were compared using Fisher’s exact test. Time to loss of stimulation was compared using the Wilcoxon 2-sample test. Setting: Pain Clinic, Henry Ford Hospital, Detroit, MI. Results: Laminotomies were performed by a single neurosurgeon and percutaneous implants were performed by a single pain medicine specialist. Percutaneous leads were anchored using Titan (Medtronic Corporation, Minneapolis, MN) anchors. Loss of capture was 24% laminotomy and 23% percutaneous with no significant difference between the 2 groups (P = 0.787). Radiographic evidence of migration was 13.63% percutaneous and 12.67% laminotomy with no significant difference (P = 0.999). The average days to loss of stimulation for the laminotomy versus percutaneous were as follows: 124.82 and 323.6 which were not statistically significant. There was no statistical difference in the days to loss of capture between the groups (P = 0.060). There was no significant difference between unilateral or bilateral symptoms in loss of capture within either group (P = 0.263, P = 0.326). There was not enough data to do comparisons by diagnosis. Comparisons of loss of capture based on electrode type was not significant in either group (P = 0.687, P = 0.371). The effect of the spinal level on the lack of recapture rates was not able to be calculated due to the number of levels. Limitations: Retrospective study. Conclusion: Rates of stimulation loss and radiographic lead migration are similar for both laminotomy and percutaneous implantation. Time to loss of stimulation was not statistically different in either group, although there was a trend toward laminotomy leads migrating earlier. Lead type and laterality of symptoms do not affect lead migration rates. The effect of the level of implant and diagnosis was indeterminate. Key words: Neuromodulation, spine, stimulation, complication, migration, pain

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Powers, Dennis L., M. Lucile Henricks, and Andreas F. Von Recum. "Percutaneous healing of clinical tympanic membrane implants." Journal of Biomedical Materials Research 20, no. 2 (February 1986): 143–51. http://dx.doi.org/10.1002/jbm.820200204.

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Jansen, J. A., J. P. C. M. van Der Waerden, H. B. M. van der Lubbe, and K. de Groot. "Tissue response to percutaneous implants in rabbits." Journal of Biomedical Materials Research 24, no. 3 (March 1990): 295–307. http://dx.doi.org/10.1002/jbm.820240303.

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Albrektsson, T., P.-I. Br??nemark, M. Jacobsson, and A. Tjellstr??m. "Present Clinical Applications of Osseointegrated Percutaneous Implants." Plastic and Reconstructive Surgery 79, no. 5 (May 1987): 721–30. http://dx.doi.org/10.1097/00006534-198705000-00007.

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Jones, S., G. Faulkner, D. Raboud, K. Fyfe, and J. Wolfaardt. "Simulation of Impact Test for Determining “Health” of Percutaneous Bone Anchored Implants." Journal of Biomechanical Engineering 128, no. 5 (February 23, 2006): 647–53. http://dx.doi.org/10.1115/1.2241685.

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There is an ongoing requirement for a clinically relevant, noninvasive technique to monitor the integrity of percutaneous implants used for dental restorations, bone-anchored hearing aids, and to retain extra-oral prostheses (ear, eye, nose, etc). Because of the limitations of conventional diagnostic techniques (CT, MRI), mechanical techniques that measure the dynamic response of the implant-abutment system are being developed. This paper documents a finite element analysis that simulates a transient response to mechanical impact testing using contact elements. The detailed model allows for a specific interface between the implant and bone and characterizes potential clinical situations including loss of bone margin height, loss of osseointegration, and development of a soft connective tissue layer at the bone-implant interface. The results also show that the expected difference in interface stiffness between soft connective tissue and osseointegrated bone will cause easily measurable changes in the response of the implant/abutment system. With respect to the loss of bone margin height, changes in the order of 0.2mm should be detectable, suggesting that this technique is at least as sensitive as radiography. A partial loss of osseointegration, while not being as readily evident as a bone margin loss, would still be detectable for losses as small as 0.5mm.

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Fiszer, Roland, Karol Zbroński, and Małgorzata Szkutnik. "Percutaneous closure of an aortopulmonary window using Amplatzer Duct Occluder II: Additional Sizes: the first reported case." Cardiology in the Young 27, no. 4 (November 21, 2016): 812–15. http://dx.doi.org/10.1017/s1047951116002134.

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AbstractTo date, there are no reported cases of the Amplatzer Duct Occluder II: Additional Sizes’ use in percutaneous closure of an aortopulmonary window. We report a case of percutaneous closure of an aortopulmonary window in a 4.5-month-old, 6 kg child. Owing to the patient’s low weight, high risk of damage to the pulmonary valve, as well as the possibility of aortic and pulmonary artery obstruction, classic implants were deemed unsuitable and a decision was made to use the Amplatzer Duct Occluder II: Additional Sizes. The implant performed very well – the soft waist filled the aortopulmonary connection and both retention discs were properly shaped and pressed against vessel walls. Echocardiogram performed 12 hours after the procedure confirmed a correct occluder position. Low-profile retention discs had no impact on pulmonary valve function, despite the defect’s proximity to the valve. No obstruction of the aortic or pulmonary artery lumen was noted. The Amplatzer Duct Occluder II: Additional Size implant is a safe and useful device for percutaneous closure of an aortopulmonary window in a carefully selected group of patients.

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Ge, Xiang, Fu Zeng Ren, and Yang Leng. "Electrochemical Deposition of Fluoridated Calcium Phosphate Thin Film on Titanium Substrates." Advanced Materials Research 47-50 (June 2008): 1387–90. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1387.

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Percutaneous type of orthopedic and dental implants requires not only a good adhesion with bone, but also the ability to form good attachment and seal with connective tissues and skins. Currently, the skin-seal of such implants still remains as a problem to be resolved. Electrochemical processing was used to modify the surface of titanium implants in order to improve the ability of anti-bacteria infection and skin seal around the implants by synthesizing a fluoridated calcium phosphate thin film on titanium substrate. The surface of titanium was cathodically treated in an electrochemical cell. A thin film of about 80 nm thickness was deposited on the titanium surface by controlling the treatment parameters. The dense and gel-like film was composed of calcium phosphate and fluorine ions. Fluorine ion has the anti-bacteria property and could help to improve the skin seal around the percutaneous device. The electrochemical method of fluoridated calcium phosphate thin film synthesis will provide an alternative method for surface treatment of orthopedic and dental implants.

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Kulkarni, Siddhant S., Amy R. Deipolyi, Yolanda C. D. Bryce, and Joseph P. Erinjeri. "Cryoablation of a Symptomatic Chest Wall Desmoid Tumor Underneath a Silicone Breast Implant." Case Reports in Radiology 2019 (December 19, 2019): 1–3. http://dx.doi.org/10.1155/2019/2650790.

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Desmoid tumors are locally aggressive tumors that have a high rate of reoccurrence, even after resection. Percutaneous cryoablation is an effective alternative treatment with less associated risk. A patient in the fifth decade of life with a history of ductal carcinoma-in-situ, status post bilateral mastectomy and silicone implant placement, presented with a palpable mass in the left breast, core biopsy proven to be a desmoid tumor underneath the implant. The patient underwent two cryoablation procedures in a six-month period. During both procedures part of the implant was included in the ablation zone without any negative effects on the implant. Cryoablation is a feasible treatment option for desmoid tumors adjacent to silicone breast implants.

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Ge, Xiang, Yang Leng, Chongyun Bao, Sherry Li Xu, Renke Wang, and Fuzeng Ren. "Antibacterial coatings of fluoridated hydroxyapatite for percutaneous implants." Journal of Biomedical Materials Research Part A 95A, no. 2 (August 19, 2010): 588–99. http://dx.doi.org/10.1002/jbm.a.32862.

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Zarb, George A. "Discussion: Present Clinical Applications of Osseointegrated Percutaneous Implants." Plastic and Reconstructive Surgery 79, no. 5 (May 1987): 731. http://dx.doi.org/10.1097/00006534-198705000-00008.

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Tsikandylakis, Georgios, Örjan Berlin, and Rickard Brånemark. "Implant Survival, Adverse Events, and Bone Remodeling of Osseointegrated Percutaneous Implants for Transhumeral Amputees." Clinical Orthopaedics and Related Research® 472, no. 10 (May 31, 2014): 2947–56. http://dx.doi.org/10.1007/s11999-014-3695-6.

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Joethy, Janna, and Bien-Keem Tan. "Precise breast implant placement using percutaneous chest wall markings." Indian Journal of Plastic Surgery 49, no. 02 (May 2016): 234–38. http://dx.doi.org/10.4103/0970-0358.191294.

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ABSTRACT Background: Traditionally, pre-operative breast markings are usually made using an indelible marker. These markings are at risk of being removed by pre-operative cleaning, positional changes and parenchymal changes post-incision. We present our approach to breast surgery with rib or intercostal markings using methylene blue. Methods: Using an indelible marker, markings are made on the breast and the inframammary crease. A blue needle (23 G) mounted on a 1 ml syringe is prepared, and aliquots of 0.1 ml of methylene blue are injected. Excessive infiltration and pre-operative local anaesthetic infiltration result in diffusion of the dye and difficulty with accuracy. Dye is injected directly over the bony periosteum closest to the inframammary fold. Results: We achieved good symmetry of bilateral breast implants. Photographs were taken pre-operative and 3 months post-operative and were evaluated independently by medical officers. All results were rated as good or very good. We had 39 patients and follow-up was between 3 and 24 months. There were no implant-related complications. Conclusions: For accurate implant placement, a fixed position must be found. Our technique utilises the relative immobility of the ribs for accurate implant placement. Disadvantages to our method were few, and we had two cases of dizziness or patients feeling faint due to pain. There is also a potential allergic or anaphylaxis reaction, but we did not experience any allergic reaction.

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Studd, J. W. W., M. Savvas, and M. Johnson. "CORRECTION OF CORTICOSTEROID-INDUCED OSTEOPOROSIS BY PERCUTANEOUS HORMONE IMPLANTS." Lancet 333, no. 8633 (February 1989): 339. http://dx.doi.org/10.1016/s0140-6736(89)91360-3.

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Jansen, J. A., J. P. C. M. Van Der Waerden, and K. De Groot. "Tissue Reaction to Bone-Anchored Percutaneous Implants in Rabbits." Journal of Investigative Surgery 5, no. 1 (January 1992): 35–44. http://dx.doi.org/10.3109/08941939209031591.

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Mylanus, E. A. M., C. W. R. J. Cremers, A. F. M. Snik, and N. W. van den Berge. "Clinical Results of Percutaneous Implants in the Temporal Bone." Archives of Otolaryngology - Head and Neck Surgery 120, no. 1 (January 1, 1994): 81–85. http://dx.doi.org/10.1001/archotol.1994.01880250071010.

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Spadaro, J. A., S. E. Chase, and D. A. Webster. "Bacterial inhibition by electrical activation of percutaneous silver implants." Journal of Biomedical Materials Research 20, no. 5 (May 1986): 565–77. http://dx.doi.org/10.1002/jbm.820200504.

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Behan, Miles, Peter Haworth, Nevil Hutchinson, Uday Trivedi, Jean-Claude Laborde, and David Hildick-Smith. "Percutaneous aortic valve implants under sedation: Our initial experience." Catheterization and Cardiovascular Interventions 72, no. 7 (December 1, 2008): 1012–15. http://dx.doi.org/10.1002/ccd.21777.

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Pfingst, Bryan E., Tomas Albrektsson, Anders Tjellström, Josef M. Miller, John Zappia, Xiaolin Xue, and Franz Weiser. "Chronic skull-anchored percutaneous implants in non-human primates." Journal of Neuroscience Methods 29, no. 3 (September 1989): 207–16. http://dx.doi.org/10.1016/0165-0270(89)90145-3.

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Li, Kai, Yang Xue, Ting Yan, Lan Zhang, and Yong Han. "Si substituted hydroxyapatite nanorods on Ti for percutaneous implants." Bioactive Materials 5, no. 1 (March 2020): 116–23. http://dx.doi.org/10.1016/j.bioactmat.2020.01.001.

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Wu, Yao, Bang Cheng Yang, Ji Yong Chen, and Xing Dong Zhang. "In Vivo and In Vitro Studies on the Bioactivity of Anodic Oxidized Titanium Metal." Key Engineering Materials 284-286 (April 2005): 251–54. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.251.

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In this study, the bioactivity of a new kind of anodic oxidized titanium metal was investigated in vitro and in vivo. After immersed in SBF solution for 7 days in vitro, apatite formed and covered almost all the surfaces of the anodic oxidized samples. In vivo animal experiment, the apatite was also tested precipitated on the interface of tissue/materials after 12 weeks post-operation, and there were no any fibrous capsule formed around the materials. The materials bonded with the bone very tightly and attached to the skin very closely, which would result in the achievement of the biological sealing for the bone-anchored percutaneous implants. These positive results might be contributed to the precipitated apatite layer formed on the surface of the bioactive oxidized titanium. Thus, Anodic oxidation treatment might be an effective way to prepare bioactive Ti both for bone replacement and percutaneous implant.

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Wilson, Blake S., Stephen Rebscher, Fan-Gang Zeng, Robert V. Shannon, Gerald E. Loeb, Dewey T. Lawson, and Mariangeli Zerbi. "Design for an Inexpensive but Effective Cochlear Implant." Otolaryngology–Head and Neck Surgery 118, no. 2 (February 1998): 235–41. http://dx.doi.org/10.1016/s0194-5998(98)80022-3.

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Widespread application of cochlear implants is limited by cost, especially in developing countries. In this article we present a design for a low-cost but effective cochlear implant system. The system includes a speech processor, four pairs of transmitting and receiving coils, and an electrode array with four monopolar electrodes. All implanted components are passive, reducing to a minimum the complexity of manufacture and allowing high reliability. A four-channel continuous interleaved sampling strategy is used for the speech processor. The processor and transmission link have been evaluated in tests with a subject previously implanted with the Ineraid electrode array and percutaneous connector. A prototype of the link, consisting of four pairs of transmitting and external receiving coils, was used, with the outputs of the receiving coils directed to four intracochlear electrodes through the percutaneous connector. The subject achieved speech reception scores with the prototype system that were equivalent to those achieved with a standard laboratory implementation of a continuous interleaved sampling processor with current-controlled stimuli.

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Hough, David A., Pamela Matthews, and Jack V. D. Hough. "Bone Conduction Implants for Amplification: Comparison of Results." Ear, Nose & Throat Journal 76, no. 12 (December 1997): 857–65. http://dx.doi.org/10.1177/014556139707601206.

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We compared the results from the North American patient database on the Xomed Audiant™ Bone Conductor™ to those reported on the NobleBiocare (previously Noblepharma) HC200 bone-anchored hearing aid (BAHA) implant, using the literature and specific results provided by one of the authors. It has been proposed that the percutaneous coupling of the NobleBiocare implant transduces energy more powerfully than the Audiant transcutaneous coupling. If true, percutaneous coupling could provide greater amplification, helping patients experiencing both conductive and sensorineural hearing loss. Aided sound-field thresholds corresponding to bone-conduction thresholds were compared retrospectively through the speech frequencies. Both the BAH A and the Audiant devices amplified in the sound field to approximate preoperative bone-conduction thresholds. No statistically significant differences existed between the amplification of warble tones through the speech frequencies for either device. We conclude that amplification with the Audiant device offers as much gain as the HC200 device through the speech frequencies. While both devices can supply effective amplification for select patients suffering from conductive hearing loss, neither provides gain superior to preoperative bone-conduction thresholds to address the needs of select patients with a substantial sensorineural component.

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Heaney, T. G., P. J. Doherty, and D. F. Williams. "Marsupialization of percutaneous implants in presence of deep connective tissue." Journal of Biomedical Materials Research 32, no. 4 (December 1996): 593–601. http://dx.doi.org/10.1002/(sici)1097-4636(199612)32:4<593::aid-jbm12>3.0.co;2-f.

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Jansen, J. A., Y. G. C. J. Paquay, and J. P. C. M. van Der Waerden. "Tissue reaction to soft-tissue anchored percutaneous implants in rabbits." Journal of Biomedical Materials Research 28, no. 9 (September 1994): 1047–54. http://dx.doi.org/10.1002/jbm.820280909.

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Smith, T. J., A. Galm, S. Chatterjee, R. Wells, S. Pedersen, A. Meimandi Parizi, A. E. Goodship, and G. W. Blunn. "Modulation of the soft tissue reactions to percutaneous orthopaedic implants." Journal of Orthopaedic Research 24, no. 7 (2006): 1377–83. http://dx.doi.org/10.1002/jor.20170.

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Wang, Xiaojing, Faming Chen, Guowei Wang, Wei Ma, and Yimin Zhao. "Anin vitroevaluation on the percutaneous sites of MAO-treated implants." Journal of Biomedical Materials Research Part B: Applied Biomaterials 87B, no. 2 (November 2008): 508–15. http://dx.doi.org/10.1002/jbm.b.31137.

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Cornelis, Francois H., Leo Razakamanantsoa, Mohamed Ben Ammar, Milan Najdawi, Francois Gardavaud, Sanaa El-Mouhadi, and Matthias Barral. "Percutaneous Image-Guided Vertebral Fixation in Cancer-Related Vertebral Compression Fractures: A Case Series Study." Medicina 57, no. 9 (August 30, 2021): 907. http://dx.doi.org/10.3390/medicina57090907.

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Background and objectives: Cancer-related vertebral compression fractures (VCF) may cause debilitating back pain and instability, affecting the quality of life of cancer patients. To further drive cement deposition during vertebroplasty, the aims of this restrospective case series study were to report the feasibility, safety and short term efficacy (≤6 months) of percutaneous vertebral fixation in cancer-related vertebral compression fractures using various intravertebral implants. Methods: All consecutive cancer patients treated with percutaneous vertebral fixation for VCF were retrospectively included. Various devices were inserted percutaneously under image guidance and filled by cement. Descriptive statistics were used and a matched paired analysis of pain scores was performed to assess for changes following interventions. Results: A total of 18 consecutive patients (12 women (66.6%) and 6 men (33.3%); mean age 59.7 ± 15.5 years) were included. A total of 42 devices were inserted in 8 thoracic and 16 lumbar vertebrae. Visual analogue scale measurement significantly improved from 5.6 ± 1.8 preoperatively to 1.5 ± 1.7 at 1 week (p < 0.01) and to 1.5 ± 1.3 at 6 months (p < 0.01). No severe adverse events were observed, but three adjacent fractures occurred between 1 week and 5 months after implantation. Conclusions: Percutaneous vertebral fixation of cancer-related VCF is feasible and safe and allows pain relief.

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McCormack, Bruce M., Rafael C. Bundoc, Mario R. Ver, Jose Manuel F. Ignacio, Sigurd H. Berven, and Edward F. Eyster. "Percutaneous posterior cervical fusion with the DTRAX Facet System for single-level radiculopathy: results in 60 patients." Journal of Neurosurgery: Spine 18, no. 3 (March 2013): 245–54. http://dx.doi.org/10.3171/2012.12.spine12477.

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Object The authors present 1-year results in 60 patients with cervical radiculopathy due to spondylosis and stenosis that was treated with a bilateral percutaneous facet implant. The implant consists of a screw and washer that distracts and immobilizes the cervical facet for root decompression and fusion. Clinical and radiological results are analyzed. Methods Between 2009 and 2011, 60 patients were treated with the DTRAX Facet System in a multicenter prospective single-arm study. All patients had symptomatic clinical radiculopathy, and conservative management had failed. The majority of patients had multilevel radiographically confirmed disease. Only patients with single-level radiculopathy confirmed by history, physical examination, and in some cases confirmatory nerve blocks were included. Patients were assessed preoperatively with Neck Disability Index, visual analog scale, quality of life questionnaire (Short Form-12 version 2), CT scans, MRI, and dynamic radiographs. Surgery was percutaneous posterior bilateral facet implants consisting of a screw and expandable washer and iliac crest bone aspirate. Patients underwent postoperative assessments at 2 weeks, 6 weeks, 3 months, 6 months, and 1 year with validated outcome questionnaires. Alterations of segmental and overall cervical lordosis, foraminal dimensions, device retention and fusion criteria were assessed for up to 1 year with CT reconstructions and radiographs. Fusion criteria were defined as bridging trabecular bone between the facets, translational motion < 2 mm, and angular motion < 5°. Results All patients were followed to 1 year postoperatively. Ages in this cohort ranged from 40 to 75 years, with a mean of 53 years. Forty-two patients were treated at C5–6, 8 at C6–7, 7 at C4–5, and 3 at C3–4. Fifty-six had bilateral implants; 4 had unilateral implants due to intraoperative facet fracture (2 patients) and inability to access the facet (2 patients). The Neck Disability Index, Short Form-12 version 2, and visual analog scale scores were significantly improved at 2 weeks and remained significantly improved up to 1 year. At the treated level, 93% had intrafacet bridging trabecular bone on CT scans, translational motion was < 2 mm in 100% and angular movement was < 5° in 83% at the 1-year follow-up. There was no significant change in overall cervical lordosis. There was a 1.6° loss of segmental lordosis at the treated level at 1 year that was significant. Foraminal width, volume, and posterior disc height was significantly increased at 6 months and returned to baseline levels at 1 year. There was no significant decrease in foraminal width and height at adjacent levels. There were no reoperations or surgery- or device-related complications, including implant failure or retained hardware. Conclusions Results indicate that the DTRAX Facet System is safe and effective for treatment of cervical radiculopathy.

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Whittet, H. B., W. S. Lund, and G. Rees. "A non-invasive percutaneous technique for localization of osseointegrated titanium implants." Minimally Invasive Therapy 2, no. 4 (January 1993): 185–87. http://dx.doi.org/10.3109/13645709309152682.

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Cuadrado García, A. M., R. A. Hernández Antolín, C. Almería Valera, and F. López Timoneda. "Anaesthetic management of percutaneous aortic valve implants: Results of 100 cases." Revista Española de Anestesiología y Reanimación (English Edition) 63, no. 8 (October 2016): 451–58. http://dx.doi.org/10.1016/j.redare.2016.05.001.

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Emanov, A. A., E. N. Gorbach, M. V. Stogov, V. P. Kuznetsov, and A. N. Diachkov. "Survival of percutaneous implants under various mechanical loading to the bone." Genij Ortopedii 24, no. 4 (December 2018): 500–506. http://dx.doi.org/10.18019/1028-4427-2018-24-4-500-506.

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Yamamura, Keiko, Hisashi Iwata, Takashi Osada, Kohji Yano, Toshihisa Yotsuyanagi, and Toshitaka Nabeshima. "Prevention of bone loss by percutaneous estradiol implants in ovariectomized rats." Journal of Biomedical Materials Research 29, no. 10 (October 1995): 1249–53. http://dx.doi.org/10.1002/jbm.820291012.

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Jang, Dr Susie S. "Case Series on Variable Presentation of Ligamentum Flavum Stimulation Following Percutaneous Cylindrical Spinal Cord Stimulator Lead Implants." Pain Physician 3;17, no. 3;5 (May 14, 2014): E397—E403. http://dx.doi.org/10.36076/ppj.2014/17/e397.

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Background: Stimulation-evoked discomfort secondary to ligamentum flavum stimulation (LFS) is a technological limitation of percutaneous spinal cord stimulator (SCS) lead implants. There is a paucity of literature describing the clinical presentation and time periods at which this side effect may present following insertion of cylindrical lead(s). Objective: To describe a series of 5 patients who presented at varying time periods after SCS lead placement with LFS. Study Design: Retrospective case series. Methods: We performed a chart review of online medical records of patients with symptoms consistent with LFS at an academic interventional pain clinic identified over 7 consecutive years (2006 - 2013). Results: LFS most frequently presented within months of implantation of cylindrical leads. One patient complained of LFS during the temporary trial while another developed LFS after lead revision. All patients were successfully treated when paddle electrodes replaced percutaneous cylindrical leads. Conclusion: LFS may present as a barrier to successful SCS treatment. Clinicians placing percutaneous SCS leads should be aware of the variable time course of LFS presentation. Paddle style electrodes seem to offer an enduring solution to LFS so that patients may continue to benefit from SCS therapy. Key words: Percutaneous electrodes, cylindrical electrode, paddle electrodes, ligamentum flavum stimulation, unwanted stimulation

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Tjellström, Anders, and Gösta Granström. "Long-Term follow-up with the Bone-Anchored Hearing Aid: A Review of the First 100 Patients between 1977 and 1985." Ear, Nose & Throat Journal 73, no. 2 (February 1994): 112–14. http://dx.doi.org/10.1177/014556139407300210.

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Skin-penetrating implants have been used since 1977 for retention of Bone Anchored Hearing Aids, or BAHA. This paper analyzes the stability of the implants and the frequency of skin reactions in the first one hundred consecutive patients operated upon at Sahlgrens Hospital, Göteborg. The follow-up time varied between 8 and 16 years. Ninety percent of the implants were found to be stable. Five percent were explanted due to direct trauma. Another five percent lost integration but often after many years in use. Adverse skin reactions were seen, but 79% of the patients had no or one single episode of soft tissue reaction. A percutaneous coupling in the mastoid process will give rise to only minor clinical problems and could be considered as a simple, predictable and safe device.

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O’Donnell, Clare, Rhonda Holloway, Elizabeth Tilton, John Stirling, Kirsten Finucane, and Nigel Wilson. "Infective endocarditis following Melody valve implantation: comparison with a surgical cohort." Cardiology in the Young 27, no. 2 (May 10, 2016): 294–301. http://dx.doi.org/10.1017/s1047951116000494.

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AbstractBackgroundInfective endocarditis has been reported post Melody percutaneous pulmonary valve implant; the incidence and risk factors, however, remain poorly defined. We identified four cases of endocarditis from our first 25 Melody implants. Our aim was to examine these cases in the context of postulated risk factors and directly compare endocarditis rates with local surgical valves.MethodsWe conducted a retrospective review of patients post Melody percutaneous pulmonary valve implant in New Zealand (October, 2009–May, 2015) and also reviewed the incidence of endocarditis in New Zealand among patients who have undergone surgical pulmonary valve implants.ResultsIn total, 25 patients underwent Melody implantation at a median age of 18 years. At a median follow-up of 2.9 years, most were well with low valve gradient (median 27 mmHg) and only mild regurgitation. Two patients presented with life-threatening endocarditis and obstructive vegetations at 14 and 26 months post implant, respectively. Two additional patients presented with subacute endocarditis at 5.5 years post implant. From 2009 to May, 2015, 178 surgical pulmonic bioprostheses, largely Hancock valves and homografts, were used at our institution. At a median follow-up of 2.9 years, four patients (2%) had developed endocarditis in this group compared with 4/25 (16%) in the Melody group (p=0.0089). Three surgical valves have been replaced.ConclusionsThe Melody valve offers a good alternative to surgical conduit replacement in selected patients. Many patients have excellent outcomes in the medium term. Endocarditis, however, can occur and if associated with obstruction can be life threatening. The risk for endocarditis in the Melody group was higher in comparison with that in a contemporaneous surgical pulmonary implant cohort.

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Al-Danakh, Abdullah, Mohammed Safi, Mohammed Alradhi, Marwan Almoiliqy, Qiwei Chen, Murad Al-Nusaif, Xuehan Yang, Aisha Al-Dherasi, Xinqing Zhu, and Deyong Yang. "Posterior Tibial Nerve Stimulation for Overactive Bladder: Mechanism, Classification, and Management Outlines." Parkinson's Disease 2022 (March 16, 2022): 1–12. http://dx.doi.org/10.1155/2022/2700227.

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Purpose of the Review. Posterior tibial nerve stimulation (PTNS) techniques have dramatically grown after approval to manage overactive bladder (OAB). The present review will focus on the most current data on PTNS types (percutaneous, transcutaneous, and implant) and their mechanism of action, safety, efficacy, advantages, drawbacks, limitation, and clinical applications. Recent Findings. The present review described the recent studies that addressed the tibial nerve stimulation role in OAB management. BlueWind RENOVA system, Bioness StimRouter, and eCoin are examples of emerging technologies that have evolved from interval sessions (percutaneous PTNS and transcutaneous PTNS) to continuous stimulation (implants). These can be efficiently managed at home by patients with minimum burden on the health system and fewer visits, especially in the COVID-19 pandemic. Summary. Our review shows that the tibial nerve stimulation advancements in OAB treatment have been rapidly increasing over the recent years. It is minimally invasive and effective, similar to sacral nerve stimulation (SNM), but less aggressive. Implantable PTNS has been promised in terms of efficacy, safety, and high acceptance rate. However, evidence is still limited to short-term trials, and tolerability, method, and drawbacks remain challenges.

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Parkin, James L., Donald K. Eddington, Jeffrey L. Orth, and Derald E. Brackmann. "Speech Recognition Experience with Multichannel Cochlear Implants." Otolaryngology–Head and Neck Surgery 93, no. 5 (October 1985): 639–45. http://dx.doi.org/10.1177/019459988509300513.

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Four patients received multichannel intracochlear implants before 1978 as part of the University of Utah program. By 1983, sound coding strategies and electronic miniaturization were developed to allow production and use of a portable sound processor/cochlear stimulator unit. Approval for expanded clinical trials has allowed Implantation of five additional patients by August 1984. Data on the earlier patients demonstrate stability of electrode thresholds and impedance, low risk of the percutaneous pedestal, and the development of speech recognition scores of greater than 60% with electrical stimulation alone and greater than 90% with electrical stimulation combined with lipreading. Data on recent recipients indicate early electrode threshold stability, lower thresholds for apical electrodes, possibility of replacing single-channel with multichannel units, and low morbidity of the implantation. Return to function in a verbally communicating environment has been achieved by one earlier patient.

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Wu, Yao, Bang Cheng Yang, Zhong Wei Gu, and Xing Dong Zhang. "The Study of Human Epithelium Cell Attachment to the Surface of Anode-Oxidized Titanium." Key Engineering Materials 342-343 (July 2007): 769–72. http://dx.doi.org/10.4028/www.scientific.net/kem.342-343.769.

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The achievement of biological sealing is determined by the quality of the skin attachment on the surface of the percutaneous implant in the area where the implant penetrates the skin. It has been known that certain surface features of the implants can significantly influence the interactions between cells and substrate. In this study, titanium plates were bioactivated through anode-oxidization firstly, and then cultured with human epithelium cells for 72h. Untreated Ti plates were used as control. After the samples were dehydrated, the morphology of the cultured epithelium cells was tested with Scanning electron microscopy (SEM). The surfaces of control group did not enhance epithelium cell attachment and growth, while the bioactivated microporous surface of anode-oxidized group would be beneficial to induce the formation of the pseudopod of epithelium cell, and then interlock the human epithelium cells through the pseudopod, which imply that the surface modification method of anode oxidization may be one of the most effective methods to resolve the biological sealing.

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Sousa, Joel, Daniel Brandão, Paulo Barreto, Joana Ferreira, José Almeida Lopes, and Armando Mansilha. "Tratamento Endovascular do Aneurisma da Aorta Abdominal por Via Percutânea e Anestesia Local – One Day Surgery." Acta Médica Portuguesa 29, no. 6 (June 30, 2016): 381. http://dx.doi.org/10.20344/amp.7715.

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Introduction: To evaluate the results of the abdominal aortic aneurism endovascular treatment (EVAR), percutaneously and with local anesthesia, according to the concept of one day surgery. Material and Methods: Unicentric, retrospective analysis of patients with aorto-iliac aneurysmal disease, consecutively treated by EVAR with percutaneous access trough the Preclose technique (pEVAR), according to the outpatient criteria, with one overnight stay in the hospital. The technical success, exclusion of the aneurysmal sac, endoleak, re-intervention and mortality were evaluated. Results: Twenty consecutive patients (all male; mean age 74.65 years) were treated by EVAR with percutaneous access and local anesthesia, from which 95% (19) presented with abdominal aortic aneurysm and 5% (1) common iliac aneurysm. All implants were sucessfully performed, with an initial endoleak rate of 10% (2), determined by one type 1a endoleak successfully corrected intra-operatively and one type 2a endoleak diagnosed in the first imaging control, which sealed spontaneously on the second control. Initial technical success for percutaneous closure was 97.5%, with one case reported of femoral pseudo-aneurism, posteriorly treated by percutaneous thrombin injection. Median length of stay was one day [1-10], with a mean follow-up of 11.4 months [1-36]. Both the re-intervention and mortality rate are 0% for the selected period. Conclusion: Our one day surgery model for the outpatient treatment of abdominal aortic aneurysm by the pEVAR technique is innovative, safe and effective, as long as the selection criteria are respected.

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He, Yiqian, Yongtao Lu, Baosheng Yin, and Li Yu. "Numerical Investigation on the Biomechanical Performance of Laparoscopic-Assisted Plate Used for Fixing Pelvic Anterior Ring Fracture." Journal of Healthcare Engineering 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/9261037.

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Because of the minimal soft tissue injury, the laparoscopic-assisted internal fixation is a promising technique in fixing the pelvic anterior ring fracture. The aim of this study was to investigate the biomechanical performance of the laparoscopic-assisted plate by the finite element method. Four kinds of implants were investigated, that is, the laparoscopic-assisted plate (LAP), the percutaneous anterior pelvic bridge (PAPB), the transramus intraosseous screw (TIS), and the open reduction (OR). The stability of the implants was investigated under three loading cases, showing that when the LAP was used, the stress at the fracture site was smaller than that at other parts, while for other implants, the high stress was always around the fracture site. In conclusion, the LAP demonstrated a good biomechanical performance in fixing the pelvic anterior ring fracture and is a promising technique in clinical applications.

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Journal articles on the topic 'Percutaneous implants'

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