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Evaluation of Extracorporeal Shockwave Lithotripsy in the Management of Renal and Ureteral Calculi

Open Journal of Urology 2021年第12期11卷 474-485页

作者： cyril Kamadjou Calson Ambomatei Achille Mbassi Annie Kameni Dolly Bilonda Kolela Fru Angwafor Medical and Surgical Center of Urology Douala Cameroon Faculty of Medicine and Pharmaceutical Sciences Department of Surgery and Specialities University of Douala Douala Cameroon Elisabeth Glaser Pediatric AIDS Foundation Buea Cameroon Central Hospital Yaounde Cameroon Coordinator Urology Residency Program Faculty of Medicine and Biomedical Sciences University of Yaounde Yaounde Cameroon

Aim: To evaluate the efficacy of extracorporeal lithotripsy in the management of renal and ureteric calculi in a urology center in Douala, Cameroon. Materials and Methods: This is a retrospective study carried out ove... 详细信息

trong>Aim: trong>To evaluate the efficacy of extracorporeal lithotripsy in the management of renal and ureteric calculi in a urology center in Douala, Cameroon. trong>Materials and Methods:trong> This is a retrospective study carried out over six years, between January 2014 and December 2020. All the patients were treated using a Direx Integra lithotripter, with the number of shockwaves ranging from 1200 to 3500, without anaesthesia and were discharged a few hours after the procedure on the same day. In a majority (63.75%) of the cases, the calculi were incidental findings. A Double-J stent was indicated in two patients and preceded extracorporeal lithotripsy because of renal colic and signs of urinary tract infection. trong>Results:trong> We recruited a total of 122 patients with a mean age of 42.19 ± 13.08. We had 65 (53.3%) males and all patients had at least one calculus confirmed by CT scan with a mean size of 13.84 ± 4.17 mm, 85 (69.7%) patients became completely stone-free after a maximum of four sessions of extracorporeal lithotripsy (ESWL). 21 (17.2%) patients had intermediate results, being asymptomatic and/or having less than three residual fragments that measured less than 4 mm. The failure rate was 13.9%, with 17 patients still having more than three fragments measuring more than 4 mm after 4 ESWL sessions. 1 (0.8%) had septic shock as a post ESWL complication while 6 (4.9%) benefitted from a complimentary medical and/or surgical treatment (double J stent placement). trong>Conclusion:trong> The management of renal and ureteral calculi through extracorporeal lithotripsy in adults seems to be particularly effective for renal calculi measuring less than 20 mm and ureteral calculi measuring less than 15 mm. Extracorporeal lithotripsy, which can be performed on an outpatient basis (and without anaesthesia) is associated with minimal complications, and remains the option of choice for most upper urinary tract calculi.

关键词： Renal and Ureteric Calculi Extracorporeal Lithotripsy Double-J Stent

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Endoscopic Management of Bladder Stones: Initial Experience at a Single Center in Cameroon

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Open Journal of Urology 2022年第5期12卷 276-285页

作者： cyril Kamadjou Annie Kameni Herve Moby Dolly Bilonda Kolela Achille Mbassi Fru Angwafor Medico-Surgical Center of Urology and Mini-Invasive Surgery Douala Cameroon Department of Surgery and Specialties Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Medical and Technology Institute Yaoundé Cameroon Coordinator of the Urology Residency Program Faculty of Medicine and Biomedical Sciences University of Yaoundé 1 Yaoundé Cameroon

Purpose: This study aimed to evaluate the efficacy and safety of endoscopic lithotripsy with the lithoclast (EMS, Switzerland) and laser Holmium YAG in the management of bladder calculi. Materials and methods: This was a retrospective study carried out from January 2013 to December 2019 on 32 patients with bladder calculi. All the patients underwent either Lithoclast or Laser lithotripsy using a 22F Storz cystoscope at the Centre medico-chirugicale d’urologie in Douala, Cameroon. Data on patients’ ages, clinical symptoms, stone sizes, type of lithotripsy, surgery duration, and results of lithotripsy were collected and analyzed using Epi info 7. Results: We recruited 32 participants (24 men and 8 women) with a median age of 41.28 [22 - 68] years into this study. In 9 (28.12%) participants, macroscopic hematuria was the main presenting complaint, followed by lower urinary tract symptoms in 8 (25%) patients. A cystoscopy was performed in 17 (53.12%) patients to confirm the diagnosis of a bladder stone, and ultrasonography of the upper urinary tract was performed in 29 (90.6%) cases to certify the absence of another stone. Lithoclast EMS was used to manage the stones in 23 (71.87%) patients while laser lithotripsy was used in 9 (28.13%). A dormia basket was used to remove stone fragments in 10 (31.25%) patients. The mean surgery duration was 33.59 ± 14.2 minutes, and the bladder stones were successfully managed in all the participants of this study. Minor complications such as pain during micturition were found in 28 (87.37%) patients, with complete resolution occurring two weeks after surgery. Conclusion: Endoscopy with lithotripsy is a safe and effective method of management of bladder stones. This technique is also associated with short surgical procedures and postoperative hospitalization periods. We believe that it is an excellent treatment modality in the management of bladder stones.

关键词： Bladder Stone Lithotripsy Mini-Invasive Surgery Dormia Basket

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Biochemical Methane Potential of Food Wastes from Akouedo Landfill, Côte d’Ivoire

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Green and Sustainable Chemistry 2018年第3期8卷 288-293页

作者： Kouadio Marc cyril Kouakou Adjoumani Rodrigue Kra Essi trokourey Albert Akichi Agboue Laboratoire de Chimie Physique Université Félix Houphou&euml t Boigny Abidjan C&ocirc te d’Ivoire Laboratoire de mécanique et des sciences des matériaux Institut National Polytechniques Felix Houphou&euml t Boigny (INPHB) Yamoussoukro C&ocirc te d’Ivoire

The determination of biochemical methane potential (BMP) is very important for the valorization of food wastes. This study is focused on the evaluation of the theoretical methane production from chemical oxygen demand (COD) of some food wastes, coming out Akouedo landfill. Almost all of the considered samples exhibited methane theoretical yields equal to about 402.5 - 507.8 mLCH4/gVS. These results indicate the suitability of all the studied food wastes from Akouedo landfill to be converted into energy.

关键词： Biochemical Methane Potential Food Wastes Akouedo Landfill Chemical Oxygen Demand

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Prostate Cancer: Risk Factors and Outcome Indicators

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Surgical Science 2022年第8期13卷 381-400页

作者： cyril Kamadjou Annie Kameni Wadeu Jerry Kuitche Achille Mbassi Justin Kamga Fru Angwafo Medico Surgical Center of Urology and Mini Invasive Surgery Douala Cameroon Faculty of Medicine and Pharmaceutical Sciences Department of Surgery and Specialties University of Douala Douala Cameroon Yaoundé Medical and Technology Institute Yaoundé Cameroon Yaoundé General Hospital Yaoundé Cameroon Coordinator Urology Residency Program Faculty of Medicine and Biomedical Sciences University of Yaoundé I Yaoundé Cameroon

Background: Prostate cancer, which is the second most frequent cancer diagnosis made in men, more commonly occurs in the elderly. This disease is often diagnosed late in resource-limited settings, which results in people having advanced forms of the disease and a poor prognosis. This study aimed to identify factors indicative of prostate cancer aggressivity and a poor prognosis in patients with prostate cancer at a single center in Douala, Cameroon. Methods: We performed a retrospective study from 2015 to 2020 at the Centre medico-chirugical d’urologie in Douala, Cameroon, in which we included 203 patients aged 41 years to 85 years who had prostate cancer diagnosed via histopathology after either prostate biopsyor laparoscopic prostatectomy. Epi-info 7 was used for data analysis and logistic regression analyses were performed to identify factors associated with prostate cancer aggressivity and patients’ outcomes (survival or mortality). Results: The mean age of our study participants was 64.76 ± 7.48 years. Ten patients had a contributive family history of prostate cancer. The patients presented with lower urinary tract symptoms in 61.58% of cases. All patients had serum prostate-specific antigen (PSA) levels of >4 ng/ml, 100 patients were anemic, and 36 patients had aggressive forms of the disease. Eighty-eight patients had remarkable digital rectal examination (DRE) findings. The median prostate volume, as determined via transrectal ultrasonography (trUS), was 59 [43 - 80] ml. Fifty-nine patients had abnormal prostate echostructures, and 33 patients died during follow-up. The presence of paraplegia and the practice of professions requiring unskilled labor were significantly associated with aggressive prostate cancer. The presence of lymphoedema, abnormal DRE findings, anemia, enlarged prostate glands (prostate volume >50 ml), and abnormal prostatic echostructures were significantly associated with both prostate cancer aggressivity and patients’ outcomes. Conclusio

关键词： Aggressive Prostate Cancer Early Diagnosis transrectal Ultrasonography Prostate Biopsy Prognosis

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transperitoneal Laparoscopic Nephrectomy for Non-Functional Kidneys: A Report of 25 Cases

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Surgical Science 2022年第10期13卷 460-470页

作者： cyril Kamadjou Emmanuel Muhawenimana Innocent Nzeyimana Achille Mbassi Bertin Njinou Ngninkeu Fru Angwafo Medico Surgical Center of Urology and Mini Invasive Surgery Douala Cameroon Department of Surgery and Specialties Faculty of Medicine and Pharmaceutical Sciences University of Douala Douala Cameroon Kigali University Teaching Hospital Kigali Rwanda Medical Technology Institute Yaounde Cameroon Gynaeco Obstetric and Pediatric Hospital Yaounde Cameroon

Background and Aim: Ever since the first-ever laparoscopic nephrectomy performed in 1991 by Clayman, laparoscopy has become the technique of choice for benign renal pathologies and also for cancerous lesions. In this paper, we present and evaluate the results of laparoscopic nephrectomy carried out on patients with non-functional kidneys at the Centre medico-chirugical d’urologie in Douala, Cameroon. Materials and Methods: This was a retrospective study carried out from 2016 to 2020. We included 25 patients with non-functional kidneys who underwent transperitoneal laparoscopic nephrectomy. Results: We included 25 patients (15 males and 10 females) with a mean age of 32.80 ± 9.76 years. Twenty (80%) patients presented with low back pain, four (16%) presented with acute pyelonephritis, and one (4%) presented with both low back pain and hematuria. The right kidney was damaged in 10 (40%) patients and the left kidney in 15 (60%) patients. The kidney failure requiring nephrectomy was due to stones in 16 (64%) patients and upper pyeloureteric junction obstruction in nine (36%) patients. The mean surgery duration was 111.08 ± 31.95 minutes. The median perioperative blood loss was 100 [70 - 120] ml. Percutaneous drainage was required in 13 (52%) patients. Only two (8%) patients developed postoperative complications. The mean follow-up duration was 64 ± 24.48 days. All patients survived the surgical intervention. Conclusion: Laparoscopic nephrectomy is a mini-invasive technique that is suitable for the surgical removal of non-functional kidneys due to either ureteropelvic junction obstruction or massive kidney stones.

关键词： Pelvic Calculi Laparoscopy Nephrectomy Pyeloureteric Junction Obstruction

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Procalcitonin and intestinal ischemia:A review of the literature

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World Journal of Gastroenterology 2014年第47期20卷 17773-17778页

作者： cyril Cosse Charles Sabbagh Sad Kamel Antoine Galmiche Jean-Marc Regimbeau INSERM U1088 Jules Verne University of Picardie80054 AmiensFrance Department of Digestive and Oncological Surgery Amiens University HospitalJules Verne University of PicardiePlace Victor PauchetF-80054 Amiens cedex 01France Clinical Research Center Amiens University Hospital80054 Amiens Cedex 01France Department of Biochemistry Amiens University HospitalJules Verne University of PicardieF-80054 AmiensFrance EA4294 Jules Verne University of PicardieF-80054 AmiensFrance

Intestinal ischemia is common after emergency gastrointestinal or cardiovascular *** present,there are no diagnostic tools for the early diagnosis of intestinal *** the last decade,procalcitonin(PCT)has been suggested as a marker of this ***,we review the use of PCT as a diagnostic tool for intestinal *** reviewers independently searched the Pub Med and EMBASE databases for articles on intestinal ischemia and *** then considered(1)the criteria applicable to preclinical and clinicaldata;and(2)PCT’s predictive value in the diagnosis of intestinal *** quality was rated according to the STAndards for Reporting of Diagnostic *** 1993 and 2014,seven studies(including two preclinical studies and five clinical studies)dealt with the use of PCT to diagnose intestinal ***’s sensitivity,specificity,positive predictive value and negative predictive value ranged between 72%and 100%;68%and 91%;27%and 90%and 81%and 100%,*** area under the receiver operating characteristic curve ranged from 0.77 to *** view of the preclinical and clinical data,we consider that PCT can be used in daily practice as a tool for diagnosing intestinal ischemia.

关键词： Procalcitonin Intestinal Ischemia Diagnosis Review

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Predicting flows through microfluidic circuits with fluid walls

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Microsystems & Nanoengineering 2021年第6期7卷 119-127页

作者： cyril Deroy Nicholas Stovall-Kurtz Federico Nebuloni Cristian Soitu Peter R.Cook Edmond J.Walsh Department of Engineering Science Osney Thermo-Fluids LaboratoryUniversity of OxfordOxford OX20ESUK Sir William Dunn School of Pathology University of OxfordOxford OX13REUK Cold Spring Harbor Laboratory Cold Spring HarborNYUSA

The aqueous phase in traditional microfluidics is usually confined by solid walls;flows through such systems are often predicted *** solid walls limit access,open systems are being developed in which the aqueous phase is partly bounded by fluid walls(interfaces with air or immiscible liquids).Such fluid walls morph during flow due to pressure gradients,so predicting flow fields remains *** recently developed a version of open microfluidics suitable for live-cell biology in which the aqueous phase is confined by an interface with an immiscible and bioinert fluorocarbon(FC40).Here,we find that common medium additives(fetal bovine serum,serum replacement)induce elastic no-slip boundaries at this interface and develop a semi-analytical model to predict flow *** experimentally validate the model’s accuracy for single conduits and fractal vascular trees and demonstrate how flow fields and shear stresses can be controlled to suit individual applications in cell biology.

关键词： walls flows flow

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GRN 125 60MJ＇ADE超级美术

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游艇业 2013年第6期 42-49页

作者： Allen cyril(编译)

中规中矩的船体，中规中矩的甲板，除了遍布各层甲板的超大面积落地窗外能—下抓住人眼球外，新近下水的J’ade号，在大多数艇迷心中，似乎“不过又是一艘超级游艇”而已。然而，当你乘坐着它前往海中央，让它向你展示它全面的“开放性... 详细信息

中规中矩的船体，中规中矩的甲板，除了遍布各层甲板的超大面积落地窗外能—下抓住人眼球外，新近下水的J’ade号，在大多数艇迷心中，似乎“不过又是一艘超级游艇”而已。然而，当你乘坐着它前往海中央，让它向你展示它全面的“开放性”的话，你会发觉其实隐藏在这幅传统面貌之下的，是一颗无比开放的心。

关键词：美术超大面积超级游艇 ade 甲板船体下水

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Management of the Valves of the Posterior Urethra in Urology

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Open Journal of Urology 2018年第5期8卷 166-170页

作者： cyril Kamadjou Kimassoum Rimtebaye Divine Eyongeta Annie Kameni Justin Kamga Bertin Njinou Medico-Surgical Center of Urology and Mini Invasive Surgery Douala Cameroon National General Referal Hospital N’Djamena Chad Regional Hospital Limbe Cameroon General Hospital Yaounde Cameroon

Aim: Describe the clinical, radiological and management of patients with posterior urethral valves. Materials and Methods: This was a retrospective descriptive study over a period going from January 2011 to December 2016, reviewing 12 cases of patients treated for valves of the urethra posterior to the medical surgical center of urology in Cameroon at Douala. The variables studied were clinical, paraclinical, therapeutic and evolutionary. Results: In 5 years, we had diagnosed and treated 12 cases of posterior urethral valves, an average of 2.4 per year. The average age of patients was 41.6 months with extrems of 3 and 156 months. The reason for consultation was dominated by urinary tract infections. Urethrocystography and echography were performed in all patients and allowed to objectify a bilateral ureterohydronephrosis, a diverticular bladder in 9 cases and 4 cases of vesico-ureteral reflux, including a grade 4 according to the classification of Cendron, 8 patients suffered from acute urinary failure. Renal scintigraphyrealised on 3 patients had as objective in 1 patient the existence of a disfunctioning kidney. The treatment consisted of an endoscopic incision of the valves (n = 8), a vesicostomy (n = 3) and an iterative urethral dilatation with double J catheter placement (n = 1). The evolution was favorable (n = 7), and 5 cases of death were recorded. Conclusion: The endoscopic incision is the gold-standard of the treatment of the valves of the posterior urethra. The vesicostomy is an alternative in the absence of adequate technical platform. Despite adequate support, the prognosis remains burdened with significant mortality.

关键词： Valves of the Urethra Vesicostomy Endoscopic Incision Renal Failure

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激光焊接Ti-6Al-4V钛合金塑性行为的原位SEM/EBSD分析（英文）

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中国材料进展 2019年第3期38卷 279-285页

作者：党宁刘玲玉 LAVOGIEZ cyril MAIRE Eric 马朝利周廉北京航空航天大学材料科学与工程学院北京100191 INSA de Lyon Mateis UMR 5510 宝钛集团有限公司陕西宝鸡721014 西北有色金属研究院陕西西安710016

选用原位SEM/EBSD显微术分析研究了Ti-6Al-4V钛合金的焊接区域的变形行为。研究发现,由于焊接时高的焊接温度(在β相变点之上)和急剧的冷却速率,导致β→α'马氏体相变的发生。SEM观察发现,在焊缝区只存在有针状的α'马氏体形貌,而在焊... 详细信息

选用原位SEM/EBSD显微术分析研究了Ti-6Al-4V钛合金的焊接区域的变形行为。研究发现,由于焊接时高的焊接温度(在β相变点之上)和急剧的冷却速率,导致β→α'马氏体相变的发生。SEM观察发现,在焊缝区只存在有针状的α'马氏体形貌,而在焊接第一热影响区和第二热影响区,针状α'相逐渐发生球化,形成了明显的显微组织梯度过渡。在对焊接区域进行SEM/EBSD下的原位拉伸实验后发现,该区域的塑性变形可划分为两个阶段。变形的第一阶段,滑移变形或孪生变形均有可能发生,这取决于晶粒的初始晶体学取向是否可通过旋转来匹配//TA(拉伸方向);而在变形的第二阶段,只发生滑移变形。

关键词：晶体学取向原位SEM 塑性变形激光焊接 Ti-6Al-4V钛合金

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