Thematische Bibliographien / Renal stone composition

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Auswahl der wissenschaftlichen Literatur zum Thema „Renal stone composition“

Autor: Grafiati

Veröffentlicht am 30. Juni 2021

Zuletzt aktualisiert am 18. Februar 2022

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Zeitschriftenartikel zum Thema "Renal stone composition"

Naznin, Lubna, Debashish Saha, Md Jahangir Chowdhury, Yasmin Akter, Most Sarmin Sultana und Ashif Chowdhury. „Composition of Renal Stone– An experience at Armed Forces Institute of Pathology“. Journal of Armed Forces Medical College, Bangladesh 12, Nr. 2 (01.12.2016): 21–25. http://dx.doi.org/10.3329/jafmc.v12i2.41080.

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Introduction: In Asia the stone belt has been reported to stretch across our neighbouring countries Pakistan, India, Myanmar etc signifies a higher incidence of renal stone disease in Bangladesh. Objective: To determine the pattern of chemical composition of renal stones by semi-quantitative technique in patients presented to Armed Forces Institute of Pathology (AFIP) and to evaluate the predominant constituent present in them. Materials and Methods: This descriptive study was conducted at Armed Forces Institute of Pathology (AFIP), Chemical pathology department from October 2013 to October 2014. Renal stones of 37 Urolithiasis patients were analyzed chemically, using DiaSys analysis kit, employing titrimetric method for estimation of calcium and colorimetric method for Oxalate, Ammonium, Phosphate, Magnesium, Uric Acid and Cystine. Concentration of each individual component then was expressed in percentage and used to interpret renal stone composition using the calculation scale. Results: Males were more prone to renal stone disease, having male to female ratio 5.2:1. Urinary stones occur in all age groups, in this study age ranged from 4 to 72 years with mean age 38.8±16.0 years and mostly affected was the working age group 21 to 50 years (70.2%). Mixed components (i.e. mixed stone) rather than a single component was the commonest type constituting 83.8% of all renal stones. The commonest mixed stone found was Calcium Oxalate with Apatite (41.9 %). Pure Calcium Oxalate was the 2nd most common (10.8%) variant followed by Struvite stones (5.4%). Cystine and Brushite were the least common renal stones in this study. Conclusion: Calcium Oxalate was the most predominant chemical component in renal stones (94.6%). More research is needed to assess the frequency, types, and correlation of renal stones with environmental, dietary and genetic factors in Bangladesh. Journal of Armed Forces Medical College Bangladesh Vol.12(2) 2016: 21-25

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Koirala, S. „Significance of analysing chemical composition of renal stones“. Journal of Pathology of Nepal 4, Nr. 7 (30.04.2014): 560–64. http://dx.doi.org/10.3126/jpn.v4i7.10314.

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Background: This article aims to decipher chemical composition of renal stones and briefly outline laboratory tests and dietary habitual changes aimed at preventing stone recurrence. It is based on analysis of 95 renal stones received in a private lab in Kathmandu over a period of 1 year. Materials and Methods: Renal stones were analysed using simple qualitative biochemical tests.The stones were checked for presence of calcium, magnesium, ammonium, oxalate, phosphate, uric acid, cystine and carbonate. Results: Calcium was present in 97.8%, ammonium was present in 98.9%, phosphate was present in 25.2%, uric acid was present in 17.8%, magnesium was present in 10.5%, carbonate was present in 2.1% and cystine was not present in any of the stones. Most of the stones were composed of mixture of two or more than two of the above mentioned elements. Conclusion: Most stones are mixture of more than two cations and anions. Studies on larger test samples and if possible in correlation with routine examination of urine and urinary electrolyte excretion in a 24 hr urine sample would further aid in efforts aimed at preventing stone recurrence. DOI: http://dx.doi.org/10.3126/jpn.v4i7.10314 Journal of Pathology of Nepal (2014) Vol. 4, 560-564

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Merchant, Michael L., Timothy D. Cummins, Daniel W. Wilkey, Sarah A. Salyer, David W. Powell, Jon B. Klein und Eleanor D. Lederer. „Proteomic analysis of renal calculi indicates an important role for inflammatory processes in calcium stone formation“. American Journal of Physiology-Renal Physiology 295, Nr. 4 (Oktober 2008): F1254—F1258. http://dx.doi.org/10.1152/ajprenal.00134.2008.

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Even though renal stones/calculi occur in ∼10% of individuals, they are an enormous economic burden to the entire US health system. While the relative metabolic composition of renal calculi is generally known, there is no clear understanding of the genetics of renal stone formation, nor are there clear prognostic indicators of renal stone formation. The application of proteomics to the analysis of renal calculi axiomatically holds that insight into renal stone pathobiology can be gained by a more comprehensive understanding of renal calculus protein composition. We analyzed isolated renal stone matrix proteins with mass spectrometric and immunohistochemical methods identifying 158 proteins with high confidence, including 28 common proteins. The abundant proteins included those identified previously in stones and proteins identified here for the first time, such as myeloid lineage-specific, integral membrane and lipid regulatory proteins. Pathway analyses of all proteins identified suggested that a significant fraction of the most abundant matrix proteins participate in inflammatory processes. These proteomic results support the hypothesis that stone formation induces a cellular inflammatory response and the protein components of this response contribute to the abundant stone matrix proteome.

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Öhman, Sten, Lasse Larsson und Hans-Göran Tiselius. „Clinical Significance of Phosphate in Calcium Oxalate Renal Stones“. Annals of Clinical Biochemistry: International Journal of Laboratory Medicine 29, Nr. 1 (Januar 1992): 59–63. http://dx.doi.org/10.1177/000456329202900108.

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We analysed calcium, magnesium, oxalate, citrate, urate and creatinine in urine and calculated risk factors in patients who had formed stones composed of calcium oxalate, and calcium phosphate, alone or as a mixture. Patients producing pure calcium oxalate stones (< 0·1% phosphate) had a higher oxalate, and lower calcium excretion than stone-free subjects and patients forming other stone types. In contrast, patients producing calcium oxalate stones containing phosphate, even in trace amounts (> 0·1%) had no increase in oxalate excretion, but a higher calcium excretion than stone-free subjects. We could not correlate any computed variable (e.g. AP(CaOx) index) to stone composition. We conclude that pure CaOx stones may be the result of a high oxalate excretion, and that other calcium containing stones may have another and probably more complex aetiology, including primary precipitation of calcium phosphates.

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Ahmed, Maha Esmeal, und Mwahib Sid Ahmed Aldosh. „STUDY OF URINARY SYSTEM CALCULI IN SUDANESE USING COMPUTED TOMOGRAPHY 2018-2019“. International Journal of Research -GRANTHAALAYAH 7, Nr. 10 (14.06.2020): 233–37. http://dx.doi.org/10.29121/granthaalayah.v7.i10.2019.391.

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Objective: The aim of study was to study the chemical composition of renal stone in Sudanese population using computed tomography scan. Method: This is analytic study conducted in Khartoum state hospitals in the period from November 2018 to October 2019.The problem of the study was no similar study done in Sudanese populations. The study was done in 100 patients. The data was collected from computed tomography scan to the kidneys, ureters and urinary bladder. Classified and analyzed by statistical package for the social sciences application (SPSS). Results: The study found that most chemical composition of renal stone among Sudanese population was uric acid (0%), Cystine (26%) then Struvite (14%) and calcium (60%). The most effective age group with renal stone was (61-70) years old (36.7%) and same age group have a Struvite stone (28.3%). Furthermore, the most common age group with a cyctine renal stone were the cystine affect in the age between 50 years to 60 years old. The uric acid, Cystine, and calcium stone composition may be reliably predicted in vivo on the basis of dual-energy Computed tomography findings. In the future, a single dual-energy computed tomography examination may contribute to not only the identification but also the chemical characterization of stones in the urinary tract and it may add to the information available from non-enhanced conventional CT performed for evaluation of nephrolithiasis.

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Swathi, D., Priyanka Singh, R. Rekha Madhuri Bai, Gundepudi Subashini, Rajni Kumari, Narayanasamy Arunai Nambi Raj und R. Vidya. „Qualitative Analysis of Human Kidney Stone Samples Using Biochemical Tests and by X-Ray Diffraction Technique“. Advanced Materials Research 584 (Oktober 2012): 489–93. http://dx.doi.org/10.4028/www.scientific.net/amr.584.489.

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Kidney stone disease is a common health problem in industrialized nations. A better understanding of the physio-chemical principles underlying the formation of kidney stone has led to a need for more precise information on the chemical composition of stones. A combined qualitative procedure for the chemical analysis of renal stone which is suitable for routine use is presented. The procedure involves two qualitative tests i.e. biochemical tests and X-ray diffraction. Through these tests we are determining the elements present in the renal stone and we can suggests people to avoid those food stuffs in which the elements present similar to kidney stone so that recurrence in future will be avoided.

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Rode, Julie, Dominique Bazin, Arnaud Dessombz, Yahia Benzerara, Emmanuel Letavernier, Nahid Tabibzadeh, Andras Hoznek et al. „Daily Green Tea Infusions in Hypercalciuric Renal Stone Patients: No Evidence for Increased Stone Risk Factors or Oxalate-Dependent Stones“. Nutrients 11, Nr. 2 (24.01.2019): 256. http://dx.doi.org/10.3390/nu11020256.

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Green tea is widely used as a ‘’healthy’’ beverage due to its high level of antioxidant polyphenol compounds. However tea is also known to contain significant amount of oxalate. The objective was to determine, in a cross-sectional observational study among a population of 273 hypercalciuric stone-formers referred to our center for metabolic evaluation, whether daily green tea drinkers (n = 41) experienced increased stone risk factors (especially for oxalate) compared to non-drinkers. Stone risk factors and stone composition were analyzed according to green tea status and sex. In 24-h urine collection, the comparison between green tea drinkers and non-drinkers showed no difference for stone risk factors such as urine oxalate, calcium, urate, citrate, and pH. In females, the prevalence of calcium oxalate dihydrate (COD) and calcium phosphate stones, assessed by infrared analysis (IRS) was similar between green tea drinkers and non-drinkers, whereas prevalence of calcium oxalate monohydrate (COM) stones was strikingly decreased in green tea drinkers (0% vs. 42%, p = 0.04), with data in accordance with a decreased oxalate supersaturation index. In males, stone composition and supersaturation indexes were similar between the two groups. Our data show no evidence for increased stone risk factors or oxalate-dependent stones in daily green tea drinkers.

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Nassir, Anmar, Hesham Saada, Taghreed Alnajjar, Jomanah Nasser, Waed Jameel, Soha Elmorsy und Hattan Badr. „The impact of stone composition on renal function“. Urology Annals 10, Nr. 2 (2018): 215. http://dx.doi.org/10.4103/ua.ua_85_17.

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Acosta-Miranda, Alex M., Thomas A. Will, Kyoko Sakamoto und Thomas Turk. „STONE COMPOSITION DIFFERENCES IN SYNCHRONOUS BILATERAL RENAL CALCULI“. Journal of Urology 179, Nr. 4S (April 2008): 561–62. http://dx.doi.org/10.1016/s0022-5347(08)61651-1.

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Rathee, Vazir Singh, Vivek HC, Sartaj Wali Khan, AK Singh, Pushpendra Kumar Shukla, Ashish Verma, Sameer Trivedi und Udai Shankar Dwivedi. „Role of computed tomography morphodensitometry in predicting the outcome of shock wave lithotripsy“. Journal of Clinical Urology 11, Nr. 5 (15.03.2018): 325–30. http://dx.doi.org/10.1177/2051415818764539.

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Objectives: The objective of this study was to predict the outcome of shock wave lithotripsy (SWL) on the basis of computed tomography (CT) morphodensitometry for ureteral and renal stones. We also assessed the possibility that Hounsfield unit (HU) values and the location of the stones could be used to predict the outcome of SWL. Material and methods: A prospective study was performed to measure stone size, location, composition, surface area, surface volume, stone burden, the skin-to-stone distance and the HU for solitary renal and ureteral stones by non-contrast CT studies (NCCT) from August 2013 to September 2015. Success of SWL was defined as: (1) being stone-free or (2) residual stone fragments < 4 mm by radiography/NCCT. Results: Of the 100 assessed patients, 68 patients (68%) were stone-free, 12 (12%) had residual stone fragments < 4 mm (clinically insignificant residual fragments) and 20 (20%) had residual stone fragments ≥ 4 mm/ancillary procedures. Multivariate analysis revealed that stone location and mean HU were significant predictors of SWL success. Receiver operating characteristic curves defined cut-off values for predicting treatment outcome. Treatment success rates were significantly higher for stones < 800 HU than with stones > 800 HU ( p = 0.160). Conclusion: Evaluation of stone HU values and stone location prior to SWL can predict treatment outcome and aid in the development of treatment strategies. Level of evidence 2 & 4

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Dissertationen zum Thema "Renal stone composition"

Mussman, B., Maryann L. Hardy, H. Jung, M. Ding, P. J. Osther und O. Graumann. „Can dual CT with fast kV-switching determine renal stone composition accurately?“ 2020. http://hdl.handle.net/10454/18520.

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Rationale and Objectives: To determine whether a single source computed tomography (CT) system utilizing fast kV switching and low dose settings can characterize (diameter and chemical composition) renal stones accurately when compared infrared spectroscopy. Materials and Methods: The chemical composition of 15 renal stones was determined using Fourier transform infrared spectroscopy. The stones were inserted into a porcine kidney and placed within a water tank for CT scanning using both fast kV switching dual energy and standard protocols. Effective atomic number of each stone was measured using scanner software. Stone diameter measurements were repeated twice to determine intra-rater variation and compared to actual stone diameter as measured by micro CT. Results: The chemical composition of three stones (one calcium phosphate and two carbonite apatite) could not be determined using the scanner software. The composition of 10/12 remaining stones was correctly identified using dual energy computed tomography (83% absolute agreement; k = 0.69). No statistical difference (p = 0.051) was noted in the mean stone diameter as measured by clinical CT and micro CT. Conclusion: Dual energy computed tomography using fast kV switching may potentially be developed as a low dose clinical tool for identifying and classifying renal stones in vivo supporting clinical decision-making.

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Bücher zum Thema "Renal stone composition"

Astroza, Gastón M., Michael E. Lipkin und Glenn M. Preminger. Intracorporeal techniques of stone fragmentation. Herausgegeben von John Reynard. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199659579.003.0018.

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The use of intracorporeal lithotripsy for the management of larger ureteral and intrarenal calculi has dramatically improved. Although the choice of intracorporeal fragmentation is frequently based on the location and composition of the stone to be treated, the experience of the clinician and availability of equipment often dictates this decision. Several different modalities of intracorporeal lithotripsy are currently available. Ultrasonic lithotripsy is mainly used for the fragmentation of large renal calculi during percutaneous nephrolithotripsy procedures. Ultrasound is used rarely via an ureteroscopic approach. Significant advances in laser fibres and power generation systems have propelled laser lithotripsy to the treatment of choice for fragmentation of most ureteral stones. Pneumatic lithotripsy consists of a pneumatically driven piston which will fragment stones by direct contact.

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Turney, Ben, und John Reynard. Medical therapy (dissolution therapy). Herausgegeben von John Reynard. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199659579.003.0024.

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Medical therapy of stone disease aims to prevent stones or dissolve existing stones. Dissolution therapy aims to dissolve stones through administration of oral agents to by direct chemolysis through renal irrigation. Since dissolution therapy may take weeks to achieve an effect, it is usually used as an adjunct to endourological treatment. Urate stones are most amenable to dissolution therapy. Stones containing any calcium have a lower chance of successful dissolution. Providing stone composition is known, irrigating chemolysis is an option for patients with large stone burdens who are unsuitable for percutaneous nephrolithotomy (PCNL). Both uric acid and cystine stones can be treated with irrigating solutions of trihydroxymethyl-aminomethan with pH 8.5–9.0, though it takes a long time to dissolve stones and oral treatment is preferred.

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Buchteile zum Thema "Renal stone composition"

Sriboonlue, P., V. Prasongwattana, U. Mahavirawat, P. Tosukhowong, P. Phantumvanit, O. Bejraputra, K. Tungsanga und V. Sitprija. „Blood and Urinary Composition of Aggregators and Inhibitors in Renal Stone Patients in Northeast Thailand“. In Urolithiasis, 683–86. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-0873-5_207.

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Ali, M. A., N. S. Allawi und R. S. Mohmed. „Chemical Composition of Renal Stones in Mosul“. In Urolithiasis, 719. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4899-0873-5_222.

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Kuz’mina, Mariya A., Anton M. Nikolaev und Olga V. Frank-Kamenetskaya. „The Formation of Calcium and Magnesium Phosphates of the Renal Stones Depending on the Composition of the Crystallization Medium“. In Lecture Notes in Earth System Sciences, 107–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21614-6_6.

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Whitley, Edward. „Uncle Tom’s Cabin and Archives of Injustice“. In Teaching with Digital Humanities, 215–27. University of Illinois Press, 2018. http://dx.doi.org/10.5622/illinois/9780252042232.003.0014.

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Ed Whitley’s chapter describes a project in which students study the curatorial work of Harriet Beecher Stowe in The Key to “Uncle Tom’s Cabin” alongside current examples of digital activism to understand how groups mobilize and share information to effect change. Students “reverse engineer” the composition of Uncle Tom’s Cabin by searching through digital archives of abolitionist texts and images to discover how Stowe’s inclusion of some materials and exclusion of others shaped her novel. Students then consider how social activists similarly sort, organize, select, and reject the documentary record of social injustice appearing online in real-time. As students compare historical periods and media forms, they reflect on the processes through which texts are created, disseminated, structured, stored, and used to change the world.

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Konferenzberichte zum Thema "Renal stone composition"

POPESCU, Sofia. „FTIR ANALYSIS AND ARTIFICIAL NEURAL NETWORK IN PREDICTION OF RENAL STONES COMPOSITION“. In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/2.1/s07.053.

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Grosjean, Romain, Benoît Sauer, Rui Guerra, Isabelle Kermarrec, Yannick Ponvianne, Daniel Winninger, Michel Daudon, Alain Blum, Jacques Felblinger und Jacques Hubert. „Determination of the chemical composition of human renal stones with MDCT: influence of the surrounding media“. In Medical Imaging, herausgegeben von Armando Manduca und Xiaoping P. Hu. SPIE, 2007. http://dx.doi.org/10.1117/12.707581.

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Matkowski, Przemyslaw K., Tomasz Falat und Andrzej Moscicki. „Reliability of Interconnections Made of Sintered Silver Nano Particles“. In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48795.

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This study investigates the effect of silver paste composition on reliability of sintered silver interconnections. The interconnections are formed between SMD 1206 chip jumpers and electroless nickel immersion gold (ENIG) coating of FR4 printed circuit board (PCB) solder pads. They are made of pastes that vary in their composition (various proportions of micro and nano particles). The sintering process was conducted in convective oven. After the process the interconnections were subjected to X-Ray inspection in order to characterize the structure of interconnections (presence of voids, total surface of interconnection etc.). During accelerated reliability tests the PCBs were subjected to combined temperature cycling and vibration loading. During the tests daisy chains of interconnections were connected to dedicated programmable multichannel event detector developed in LIPEC lab. The event detector is able to detect and store information about object condition based on the real-time resistance measurements and applied novel algorithm of event detection. Failure modes were confirmed by using X-Ray computed tomography. The paper presents results of comparative Weibull analysis.

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