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Oliveira B, Teixeira B, Magalhães M, Vinagre N, Fraga A, Cavadas V. Extracorporeal shock wave lithotripsy: retrospective study on possible predictors of treatment success and revisiting the role of non-contrast-enhanced computer tomography in kidney and ureteral stone disease. Urolithiasis 2024; 52:65. [PMID: 38630281 PMCID: PMC11024041 DOI: 10.1007/s00240-024-01570-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 04/06/2024] [Indexed: 04/19/2024]
Abstract
Extracorporeal shock wave lithotripsy (ESWL) is a safe and efficient treatment option for urinary stone disease. The overall stone-free rate (SFR) varies significantly. This study aimed to assess the influence of stone size, location, stone density, and skin-to-stone distance (SSD), on the outcome of ESWL. We assessed whether pre-treatment non-contrast-enhanced CT scan (NCCT) confers significant advantages compared to kidney-ureter-bladder film (KUB) only. We reviewed the medical records of 307 cases (165 men, 142 women) with renal and ureteral stones treated consecutively at our institution with ESWL between 2020 and 2023. 44 of these underwent a NCCT. The outcome of ESWL was defined in two ways: visible stone fragmentation on KUB, and the need for further treatment. Overall success of fragmentation was 85% (261 patients). 61% of patients (n = 184) didn't need any further treatment. Stone size and location correlated significantly with treatment outcomes regarding the need for further treatment (p = 0.004) and stone fragmentation (p = 0.016), respectively. Unlike mean SSD (p = 0.462), the mean attenuation value (MAV) significantly correlated with the need for retreatment (p = 0.016). MAV seems to be a better predictor of treatment success (AUC of the ROC curve: 0.729), compared to stone size (AUC: 0.613). The difference between groups (with and without NCCT) in both treatment outcomes did not reach statistical significance. During decision-making, information regarding SSD and MAV can be useful in more dubious scenarios. However, it appears that their inclusion doesn't provide substantial advantages when compared to relying solely on KUB.
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Affiliation(s)
| | | | | | - Nuno Vinagre
- Unidade Local de Saúde de Santo António, Porto, Portugal
| | - Avelino Fraga
- Unidade Local de Saúde de Santo António, Porto, Portugal
| | - Vítor Cavadas
- Unidade Local de Saúde de Santo António, Porto, Portugal
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Alharbi AS, Gameraddin M, Gareeballah A, Shrwani ZJ, Sindi MA, Alsaedi HI, Qurashi AA, Aloufi KM, Alshamrani AFA, Alzain AF. Assessment of Hounsfield Units and Factors Associated with Fragmentation of Renal Stones by Extracorporeal Shock Wave Lithotripsy: A Computerized Tomography Study. Tomography 2024; 10:90-100. [PMID: 38250954 PMCID: PMC10821390 DOI: 10.3390/tomography10010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/06/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
The success rate of extracorporeal shock wave lithotripsy (ESWL) is influenced by various factors, including stone density, and is determined through computed tomography scans in terms of Hounsfield units (HU). MATERIALS AND METHODS This retrospective single-center study was conducted in the King Fahad Hospital. Sixty-seven adult patients with renal and ureteric stones were selected randomly and enrolled in the study. Their ages ranged from 20 to 69 years. The patients were examined with non-contrast enhancement (NCCT) to assess the HU of their stones and were consequently treated with ESWL. RESULTS Of the 67 patients, 37.3% had stones that were completely fragmented, while 62.7% had stones that were partially fragmented. The HU, location of the stone, multiplicity of the stone, and patient age were found to be significant factors contributing to stone fragility (p-values < 0.05). The HU data were found to have a positive significant linear correlation with serum calcium (r = 0.28, p-value = 0.036), while serum acid had a negative correlation (r = -0.55, p-value < 0.001). Thus, the probability of calcium-containing stone formation increases with increased HU. In contrast, uric acid stone formation likely develops with decreasing HU with serum uric acid. Renal stones in patients with diabetes mellitus and hypertension were not completely fragmented compared to those without clinical history. CONCLUSIONS Mean HU, location of the stone, laterality, stone status, and the number of ESWL sessions are the most significant factors affecting stone fragility. CT attenuation values can predict the composition of stones from serum calcium and uric acid examinations. Hypertension and diabetes mellitus are risk factors for renal stone fragmentation.
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Affiliation(s)
- Abdallah Saud Alharbi
- Medical Imaging Department, King Fahad Hospital, Al-Madinah 42210, Saudi Arabia (Z.J.S.)
| | - Moawia Gameraddin
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
- Department of Diagnostic Radiology, Faculty of Radiological Sciences and Medical Imaging, Alzaiem Alazhari University, Khartoum 13311, Sudan
| | - Awadia Gareeballah
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
- Department of Diagnostic Radiology, Faculty of Radiological Sciences and Medical Imaging, Alzaiem Alazhari University, Khartoum 13311, Sudan
| | - Zahra Jibril Shrwani
- Medical Imaging Department, King Fahad Hospital, Al-Madinah 42210, Saudi Arabia (Z.J.S.)
| | - Moa’ath Abdullah Sindi
- Medical Imaging Department, King Fahad Hospital, Al-Madinah 42210, Saudi Arabia (Z.J.S.)
| | | | - Abdulaziz A. Qurashi
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
| | - Khalid M. Aloufi
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
| | - Abdullah Fahad A. Alshamrani
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
| | - Amel F. Alzain
- Department of Diagnostic Radiology Technology, College of Applied Medical Sciences, Taibah University, Al-Madinah 41477, Saudi Arabia; (A.G.)
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Snicorius M, Drevinskaitė M, Miglinas M, Čekauskas A, Urbonienė V, Bandzevičiūtė R, Čeponkus J, Šablinskas V, Želvys A. A Prospective Study on the Impact of Clinical Factors and Adjusted Triple D System for Success Rate of ESWL. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1827. [PMID: 37893545 PMCID: PMC10608682 DOI: 10.3390/medicina59101827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/29/2023]
Abstract
Objective: Our study aimed to evaluate the success rate of ESWL and identify relevant treatment-specific factors affecting treatment outcomes, as well as to assess the accuracy of the updated Triple D scoring system and compare it with older systems. Material and Methods: A prospective study of 71 patients who received ESWL treatment for renal stones that were 5-15 mm in size was completed. The patient having no residual stones or residual stones lesser than 4 mm after ESWL was identified as a treatment success. Univariate and multivariate logistic regression and ROC curves were used to identify important factors for treatment outcomes. Results: Successful treatment was achieved for 66.2% of patients. The stone volume (SV), mean stone density (MD), and delivered power to the stone volume unit ratio (SMLI/SV) were defined as the most critical factors influencing ESWL success. An updated Triple D score system with a, SMLI/SV ratio could be an alternative to older systems and reach an even higher accuracy. A limitation of this study is the limited sample size due to the COVID-19 pandemic. Conclusions: Our results show that the three factors that most influence the success of ESWL are the stone size, mean stone density, and SMLI/SV ratio. Based on this, we present a simple updated triple D score system to predict ESWL success, which could be implemented in future clinical practice.
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Affiliation(s)
- Marius Snicorius
- Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 03225 Vilnius, Lithuania
| | - Mingailė Drevinskaitė
- Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 03225 Vilnius, Lithuania
| | - Marius Miglinas
- Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 03225 Vilnius, Lithuania
| | - Albertas Čekauskas
- Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 03225 Vilnius, Lithuania
| | - Vidita Urbonienė
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, 10222 Vilnius, Lithuania
| | - Rimantė Bandzevičiūtė
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, 10222 Vilnius, Lithuania
| | - Justinas Čeponkus
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, 10222 Vilnius, Lithuania
| | - Valdas Šablinskas
- Institute of Chemical Physics, Faculty of Physics, Vilnius University, 10222 Vilnius, Lithuania
| | - Arunas Želvys
- Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, 03225 Vilnius, Lithuania
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Zeng G, Zhong W, Chaussy CG, Tiselius HG, Xu C, Turney B, Turk C, Tailly GG, Preminger GM, Akpinar H, Petrik A, Bernardo N, Wiseman O, Farahat Y, Budia A, Jones DK, Beltran Suarez E, De Marco F, Mazzon G, Lv J, Natchagande G, Guven S, Ibrahim TAA, Xu H, Xie L, Ye Z, Sarica K. International Alliance of Urolithiasis Guideline on Shockwave Lithotripsy. Eur Urol Focus 2023; 9:513-523. [PMID: 36435718 DOI: 10.1016/j.euf.2022.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/04/2022] [Accepted: 11/08/2022] [Indexed: 11/24/2022]
Abstract
Different international associations have proposed their own guidelines on urolithiasis. However, the focus is primarily on an overview of the principles of urolithiasis management rather than step-by-step technical details for the procedure. The International Alliance of Urolithiasis (IAU) is releasing a series of guidelines on the management of urolithiasis. The current guideline on shockwave lithotripsy (SWL) is the third in the IAU guidelines series and provides a clinical framework for urologists and technicians performing SWL. A total of 49 recommendations are summarized and graded, covering the following aspects: indications and contraindications; preoperative patient evaluation; preoperative medication; prestenting; intraoperative analgesia or anesthesia; intraoperative position; stone localization and monitoring; machine and energy settings; intraoperative lithotripsy strategies; auxiliary therapy following SWL; evaluation of stone clearance; complications; and quality of life. The recommendations, tips, and tricks regarding SWL procedures summarized here provide important and necessary guidance for urologists along with technicians performing SWL. PATIENT SUMMARY: For kidney and urinary stones of less than 20 mm in size, shockwave lithotripsy (SWL) is an approach in which the stone is treated with shockwaves applied to the skin, without the need for surgery. Our recommendations on technical aspects of the procedure provide guidance for urologists and technicians performing SWL.
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Affiliation(s)
- Guohua Zeng
- Department of Urology, First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou, China.
| | - Wen Zhong
- Department of Urology, First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Christian G Chaussy
- University of Munich, Munich, Germany; University of Regensburg, Regensburg, Germany
| | - Hans Göran Tiselius
- Division of Urology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Changbao Xu
- The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ben Turney
- Department of Urology, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Christian Turk
- Department of Urology, Hospital of the Sisters of Charity, Vienna, Austria
| | | | - Glenn M Preminger
- Division of Urologic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Haluk Akpinar
- Department of Urology, Florence Nightingale Hospitals Group, Istanbul, Turkey
| | - Ales Petrik
- Department of Urology, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Norberto Bernardo
- Department of Urology, Hospital de Clinicas Jose de San Martin, Buenos Aires, Argentina
| | - Oliver Wiseman
- Department of Urology, Cambridge University Hospitals, Cambridge, UK
| | - Yasser Farahat
- Department of Urology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Alberto Budia
- Department of Urology, La Fe Polytechnic University Hospital, Valencia, Spain
| | - David K Jones
- Department of Pharmacology, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Edgar Beltran Suarez
- Department of Urology, Specialty Hospital La Raza, National Medical Center of the Mexican Institute of Social Security, Mexico City, Mexico
| | - Ferdinando De Marco
- Urology Division, Istituto Neurotraumatologico Italiano-Grottaferrata, Rome, Italy
| | - Giorgio Mazzon
- Department of Urology, San Bassiano Hospital, Vicenza, Italy
| | - Jianlin Lv
- Department of Urology, Jiangning Hospital, Nanjing Medical University, Nanjing, China
| | | | - Selcuk Guven
- Urology Department, Meram School of Medicine, Necmettin Erbakan University, Konya, Turkey
| | | | - Hanfeng Xu
- Department of Urology, First Affiliated Hospital of University of South China, Henyang, China
| | - Lei Xie
- Department of Urology, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
| | - Zhangqun Ye
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kemal Sarica
- Department of Urology, Biruni University Medical School, Istanbul, Turkey.
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Yin X, Li J, Pan C, Liu G, Li Z, Bai S. Development and validation of a predictive model for stone-free failure after extracorporeal shockwave lithotripsy in patients with ureteral stone in a large prospective cohort. World J Urol 2023; 41:1431-1436. [PMID: 36912972 DOI: 10.1007/s00345-023-04358-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 02/09/2023] [Indexed: 03/14/2023] Open
Abstract
PURPOSE To develop and validate a nomogram for predicting stone-free failure after shock wave lithotripsy (SWL) guided by ultrasound in patients with ureteral stones. METHODS The development cohort consisted of 1698 patients who underwent SWL guided by ultrasound at our center from June 2020 through August 2021. Multivariate unconditional logistic regression analysis was used for building a predictive nomogram with regression coefficients. An independent validation cohort consisted of 712 consecutive patients from September 2020 through April 2021. The performance of the predictive model was assessed in regard to discrimination, calibration, and clinical usefulness. RESULTS Predictors of stone-free failure included distal stone location (odds ratio = 1.540, P < 0.001), larger stone size (odds ratio = 1.722, P < 0.001), higher stone density (odds ratio = 1.722, P < 0.001), larger skin to stone distance (SSD) (odds ratio = 1.058, P < 0.001), and higher grade of hydronephrosis (odds ratio = 1.755, P = 0.010). For the validation cohort, the model showed good discrimination with an area under the receiver operating characteristic curve of 0.925 (95% confidence interval, 0.898, 0.953) and good calibration (unreliability test, P = 0.412). Decision curve analysis demonstrated that the model was also clinically useful. CONCLUSIONS This study demonstrated that stone location, stone size, stone density, SSD, and hydronephrosis grade were significant predictors of stone-free failure after SWL guided by ultrasound in patients with ureteral stones. This may guide clinical practice.
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Affiliation(s)
- Xiaoming Yin
- Department of Pediatric Urology, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Jia Li
- Department of Urology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang, 110004, Liaoning, People's Republic of China
| | - Chunyu Pan
- Department of Urology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang, 110004, Liaoning, People's Republic of China
| | - Gang Liu
- Department of Urology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang, 110004, Liaoning, People's Republic of China
| | - Zhenhua Li
- Department of Urology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang, 110004, Liaoning, People's Republic of China.
| | - Song Bai
- Department of Urology, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang, 110004, Liaoning, People's Republic of China.
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Non-contrast computed tomography-based factors in predicting ESWL success: A systematic review and meta-analysis. Prog Urol 2023; 33:27-47. [PMID: 36202729 DOI: 10.1016/j.purol.2022.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 09/06/2022] [Accepted: 09/09/2022] [Indexed: 11/05/2022]
Abstract
PURPOSE We assessed the efficacy of some predictive factors that can be measured with non-contrast computed tomography and may affect ESWL success with a systematic review and meta-analysis. MATERIALS AND METHODS All data sources were broadly investigated up to April 2022. Data were extracted from the relevant studies and analyzed with RevMan software. In a random effects model, standard mean difference (SMD) and risk ratio (RR) values were given with 95% confidence intervals. RESULTS In total, pooled analysis included 7148 patients in 43 studies. The combined effect estimate showed significant differences between the ESWL success and ESWL failure groups in terms of Hounsfield unit (HU), Hounsfield density (HD), skin to stone distance (SSD), ureteral wall thickness (UWT), stone volume, stone area, abdominal fat parameters, diameter of proximal ureter, and hydronephrosis. However, perinephric stranding and renal cortical thickness were not found to be statistically significant between the study groups. CONCLUSIONS HU, HD, SSD, UWT, stone volume, stone area, abdominal fat parameters, diameter of proximal ureter and hydronephrosis are effective factors for prediction of ESWL success. It is important to decide on treatment before the procedure for stones with appropriate diameter for ESWL.
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Mehra S. Role of Dual-Energy Computed Tomography in Urolithiasis. JOURNAL OF GASTROINTESTINAL AND ABDOMINAL RADIOLOGY 2022. [DOI: 10.1055/s-0042-1749108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Abstract
Objectives The objectives of this study are to describe the role of dual-energy computed tomography (DECT) in evaluation of renal stones in current practice and elaborate the imaging findings that need to be reported to help surgeons make an appropriate management strategy for renal stones.
Background Nephrolithiasis is a global problem, affecting people across geographical, cultural, and economic boundaries. Renal stones can be accurately diagnosed on computed tomography.
Discussion With the development of DECT, renal stones can now be better characterized in terms of stone burden, stone composition, and stone fragility.
Conclusion These parameters are helpful to treating surgeons in not only planning an appropriate management for patient but also in predicting the success of the various procedures such as extracorporeal shock wave lithotripsy, flexible ureterorenoscopy, or percutaneous nephrolithotomy. Familiarity with recent developments will help radiologists give an apt description of renal stone to meet the requirements of treating surgeon.
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Affiliation(s)
- Shibani Mehra
- Department of Radiodiagnosis, RML Hospital, Atal Bihari Vajpayee Institute of Medical Sciences, New Delhi, India
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Wagenius M, Oddason K, Utter M, Popiolek M, Forsvall A, Lundström KJ, Linder A. Factors influencing stone-free rate of Extracorporeal Shock Wave Lithotripsy (ESWL); a cohort study. Scand J Urol 2022; 56:237-243. [DOI: 10.1080/21681805.2022.2055137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Magnus Wagenius
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
- Department of Urology Helsingborg Hospital, Helsingborg, Sweden
| | - Karl Oddason
- Department of Urology Helsingborg Hospital, Helsingborg, Sweden
| | - Maria Utter
- Department of Urology Helsingborg Hospital, Helsingborg, Sweden
| | - Marcin Popiolek
- Department or Urology, Örebro University Hospital, Örebro, Sweden
| | - Andreas Forsvall
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
- Department of Urology Helsingborg Hospital, Helsingborg, Sweden
| | - Karl-Johan Lundström
- Institution of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - Adam Linder
- Department of Clinical Sciences, Division of Infection Medicine, Lund University, Lund, Sweden
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Lee JY, Andonian S, Bhojani N, Bjazevic J, Chew BH, De S, Elmansy H, Lantz-Powers AG, Pace KT, Schuler TD, Singal RK, Wang P, Ordon M. Canadian Urological Association guideline: Management of ureteral calculi - Abridged version. Can Urol Assoc J 2021; 15:383-393. [PMID: 34847343 PMCID: PMC8631858 DOI: 10.5489/cuaj.7652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jason Y. Lee
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Sero Andonian
- Division of Urology, Department of Surgery, McGill University Health Centre, Montreal, QC, Canada
| | - Naeem Bhojani
- Department of Urology, Université de Montréal, Montreal, QC, Canada
| | - Jennifer Bjazevic
- Division of Urology, Department of Surgery, Western University, London, ON, Canada
| | - Ben H. Chew
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Shubha De
- Division of Urology, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Hazem Elmansy
- Urology, Northern Ontario School of Medicine, Thunder Bay, ON, Canada
| | | | - Kenneth T. Pace
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Trevor D. Schuler
- Division of Urology, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Rajiv K. Singal
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Peter Wang
- London Health Sciences Centre, Western University, London, ON, Canada
| | - Michael Ordon
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
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Lee JY, Andonian S, Bhojani N, Bjazevic J, Chew BH, De S, Elmansy H, Lantz-Powers AG, Pace KT, Schuler TD, Singal RK, Wang P, Ordon M. Canadian Urological Association guideline: Management of ureteral calculi - Full-text. Can Urol Assoc J 2021; 15:E676-E690. [PMID: 34464257 PMCID: PMC8631842 DOI: 10.5489/cuaj.7581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jason Y. Lee
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Sero Andonian
- Division of Urology, Department of Surgery, McGill University Health Centre, Montreal, QC, Canada
| | - Naeem Bhojani
- Department of Urology, Université de Montréal, Montreal, QC, Canada
| | - Jennifer Bjazevic
- Division of Urology, Department of Surgery, Western University, London, ON, Canada
| | - Ben H. Chew
- Department of Urologic Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Shubha De
- Division of Urology, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Hazem Elmansy
- Urology, Northern Ontario School of Medicine, Thunder Bay, ON, Canada
| | | | - Kenneth T. Pace
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Trevor D. Schuler
- Division of Urology, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Rajiv K. Singal
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Peter Wang
- London Health Sciences Centre, Western University, London, ON, Canada
| | - Michael Ordon
- Division of Urology, Department of Surgery, University of Toronto, Toronto, ON, Canada
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Correlative investigation between routine clinical parameters of dual-energy computed tomography and the outcomes of extracorporeal shock wave lithotripsy in children with urolithiasis: a retrospective study. Abdom Radiol (NY) 2021; 46:4881-4887. [PMID: 34114086 DOI: 10.1007/s00261-021-03162-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To evaluate the associations of DECT parameters with extracorporeal shock wave lithotripsy (ESWL) outcomes in pediatric patients. METHODS A retrospective study of consecutive patients with calculi who underwent ESWL and DECT in our hospital was performed in 2011-2019. The primary outcome was DECT imaging's correlation with ESWL outcomes. The secondary outcome was to determine DECT parameters independently predicting ESWL outcomes, including stone-free (SF) and residual stone (RS) statuses. RESULTS The study included 207 patients. The mean CT attenuations at 140 kVp, 80 kVp, and 120 kVp and effective atomic number (Zeff) were significantly correlated with stone free (SF) and residual stone (RS) (P < 0.05). Areas under the curves (AUCs) of CT attenuations at 120 kVp, 80 kVp, 140 kVp, and dual-energy index (DEI) were 0.784 (95% CI 0.672-0.897), 0.780 (95% CI 0.677-0.884), 0.766 (95% CI 0.658-0.885), and 0.709 (95% CI 0.578-0.840) (all P < 0.05). With cutoffs of 882.5, 1330.5, 1042.5, and 0.103 for CT attenuations at 140 kVp, 80 kVp, 120 kVp, and DEI, respectively, sensitivities and specificities were 75.0% and 31.1%, 83.3% and 31.8%, 80.3% and 31.1%, and 58.3% and 44.7%, respectively. CONCLUSION Our results demonstrated that the parameters of DECT could be used to predict ESWL outcomes (especially the SF status) in children with urolithiasis. ESWL success can be accurately predicted by DECT, and it is hard to predict ESWL failure.
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Elbaset MA, Taha DE, Anas M, Abouelkheir RT, Edwan M, Abdullateef M, Ashour R, Osman Y, Sheir KZ. Optimization of shockwave lithotripsy use for single medium sized hard renal stone with stone density ≥ 1000 HU. A prospective study. World J Urol 2021; 40:243-250. [PMID: 34392391 DOI: 10.1007/s00345-021-03807-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/04/2021] [Indexed: 11/28/2022] Open
Abstract
PURPOSE To identify shock wave lithotripsy (SWL) success predictors in hard renal stones (average stone density ≥ 1000 HU). MATERIALS We prospectively evaluated patients who underwent SWL for hard renal stones between April 2018 and December 2020. Radiological parameters were identified, e.g., stone site, size, the average density in addition to stone core and shell mean density, and renal cortical thickness (RKT). SWL sessions were performed using Doli-S lithotripter till a maximum of 3-4 sessions with 2-4 weeks interval. Initial response to SWL included stone fragmentation and decreased stone size after the first SWL. Treatment success was considered if complete clearance of renal stones occurred or in case of clinically insignificant residual fragments ≤ 4 mm after 12 weeks follow up by NCCT. RESULTS Out of 1878 patients who underwent SWL, the study included 157 patients with hard renal stones. Treatment overall success was found in 92 patients (58.6%) where 69 patients (43.9%) had complete stone clearance. On multivariate analysis, stone shell density < 901 HU, maximum stone size < 1 cm, RKT > 1.95 cm and initial treatment response were associated with increased the success rate after SWL for hard renal stones (P = 0.0001, 0.009, < 0.0001 and < 0.0001, respectively). CONCLUSION In hard renal stones, treatment overall success was found in 58.6% where complete stone clearance was found in 43.9%. Stone outer shell fragility, lower stone size, increased RKT and initial response to SWL were associated with a higher success rate at 12-week follow-up.
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Affiliation(s)
- M A Elbaset
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt.
| | - Diaa-Eldin Taha
- Urology Department, KafrELshiekh University, Kafr Al Sheikh, Egypt
| | - Marwan Anas
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Rasha T Abouelkheir
- Radiology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Mohamed Edwan
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Muhamad Abdullateef
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Rawdy Ashour
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - Yasser Osman
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
| | - K Z Sheir
- Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt
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Outcome groups and a practical tool to predict success of shock wave lithotripsy in daily clinical routine. World J Urol 2021; 39:943-951. [PMID: 32436072 DOI: 10.1007/s00345-020-03253-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 05/08/2020] [Indexed: 12/13/2022] Open
Abstract
PURPOSE To improve outcome prediction of extracorporeal shock wave lithotripsy (SWL) by development of a model based on easily available clinical and radiographical predictors and suitable for daily clinical use. MATERIALS AND METHODS We evaluated predictive factors for SWL success in 517 consecutive patients suffering from urinary calculi who underwent SWL between 2010 and 2018. Analyses included descriptive statistics, receiver operating characteristic statistics and logistic regression. Predictive value was improved by combining parameters using model selection and recursive partitioning. RESULTS Of the 517 patients, 310 (60.0%) had a successful SWL. Best individual predictor of SWL success was mean attenuation (MAV), with an area under the curve (AUC) of 0.668, and an optimal cutpoint (OC) of 987.5 HU. The best multivariable model, including MAV, stone size, skin to stone distance (SSD), presence of an indwelling stent, and four interaction effects, yielded an AUC of 0.736. Recursive partitioning would categorize patients into three outcome groups with high (76.9%), intermediate (41%) and low (10%) success probability. High probability of SWL success (76.9%) was found for patients with a stone with MAV ≤ 987 HU or with MAV > 987 HU but stone size ≤ 11 mm and SSD (45°) ≤ 88 mm. CONCLUSION A model based on four established predictors, and provided as an Excel®-Tool, can clearly improve prediction of SWL success. In addition, patients can be classified into three defined outcome groups based on simple cutpoint combinations. Both tools improve informed decision-making in daily clinical practice and might reduce failure rates.
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Mains EA, Blackmur JP, Sharma AD, Gietzmann WK, El-Mokadem I, Stephenson C, Wallace S, Phipps S, Thomas BG, Tolley DA, Cutress ML. Shockwave Lithotripsy Is an Efficacious Treatment Modality for Obese Patients with Upper Ureteral Calculi: Logistic Regression and Matched-Pair Analyses from a Dedicated Center Comparing Treatment Outcomes by Skin-to-Stone Distance. J Endourol 2020; 34:487-494. [DOI: 10.1089/end.2019.0717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Edward A.A. Mains
- Department of Urology, Western General Hospital, Edinburgh, United Kingdom
| | - James P. Blackmur
- Department of Urology, Western General Hospital, Edinburgh, United Kingdom
- MRC Human Genetics Unit, Western General Hospital, Edinburgh, United Kingdom
| | - Abhishek D. Sharma
- Department of Urology, Western General Hospital, Edinburgh, United Kingdom
| | | | - Ismail El-Mokadem
- Department of Urology, Aberdeen Royal Infirmary, Aberdeen, United Kingdom
| | - Carolann Stephenson
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
| | - Shirley Wallace
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
| | - Simon Phipps
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
| | - Ben G. Thomas
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
| | - David A. Tolley
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
| | - Mark L. Cutress
- Department of Urology, The Scottish Lithotriptor Centre, Western General Hospital, Edinburgh, United Kingdom
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Reggio E, Danilovic A, Tustumi F, Bernardo WM. Urinary lithiasis: diagnostic investigation. Rev Assoc Med Bras (1992) 2019; 65:1037-1041. [PMID: 31531598 DOI: 10.1590/1806-9282.65.8.1037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 11/22/2022] Open
Affiliation(s)
- Ernesto Reggio
- . Sociedade Brasileira de Urologia, Rio de Janeiro, RJ, Brasil
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Sugino Y, Kato T, Furuya S, Sasaki T, Arima K, Sugimura Y. The usefulness of the maximum Hounsfield units (HU) in predicting the shockwave lithotripsy outcome for ureteral stones and the proposal of novel indicators using the maximum HU. Urolithiasis 2019; 48:85-91. [PMID: 30859262 DOI: 10.1007/s00240-019-01123-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/01/2019] [Indexed: 10/27/2022]
Abstract
Computed tomography (CT) attenuation value of ureteral stones is one of the predictors of shockwave lithotripsy (SWL) outcome. It is common to use the mean Hounsfield units (HU) to describe the CT attenuation value. However, an observer bias can occur when measuring the mean HU in the conventional method. On the other hand, our way to obtain only the maximum HU is simpler and less biased. We retrospectively evaluated 464 patients with ureteral stones who underwent SWL and compared predictive accuracy of various factors including maximum and mean HU. Results were determined after a single SWL. Predictors of SWL success were examined by the statistical analysis of successful and failed groups. 324 of the 464 patients who underwent SWL were stone-free after a single SWL. Significant differences were found in factors related to CT attenuation value and stone size. As a result of receiver operating characteristic analysis, it was found that maximum HU and mean HU, major diameter and volume have equivalent prediction accuracy, respectively. Multivariate analysis revealed that maximum HU and major diameter were included in independent predictors. We also examined the new original indicators using maximum HU and major diameter. Stone-resistant probability obtained from the logistic model and Maximum HU and Major diameter Index obtained by multiplying maximum HU by major diameter were useful for predicting SWL success, respectively. In conclusion, maximum HU and mean HU have equivalent predictive accuracy, and maximum HU is easier to measure and less biased than mean HU.
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Affiliation(s)
- Yusuke Sugino
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Mie, Japan. .,Department of Urology, Yokkaichi Hazu Medical Hospital, Mie, Japan.
| | - Takahiro Kato
- Department of Urology, Yokkaichi Hazu Medical Hospital, Mie, Japan
| | - Shigeru Furuya
- Department of Radiology, Yokkaichi Hazu Medical Hospital, Mie, Japan
| | - Takeshi Sasaki
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Mie, Japan
| | - Kiminobu Arima
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Mie, Japan
| | - Yoshiki Sugimura
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, Mie, Japan
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Mannil M, von Spiczak J, Hermanns T, Poyet C, Alkadhi H, Fankhauser CD. Three-Dimensional Texture Analysis with Machine Learning Provides Incremental Predictive Information for Successful Shock Wave Lithotripsy in Patients with Kidney Stones. J Urol 2018; 200:829-836. [DOI: 10.1016/j.juro.2018.04.059] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2018] [Indexed: 10/17/2022]
Affiliation(s)
- Manoj Mannil
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
| | - Jochen von Spiczak
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
| | - Thomas Hermanns
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
| | - Cédric Poyet
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
| | - Hatem Alkadhi
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
| | - Christian Daniel Fankhauser
- Institute of Diagnostic and Interventional Radiology and Department of Urology (TH, CP, CDF), University Hospital Zurich, University of Zurich, Switzerland
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Prediction of successful shock wave lithotripsy with CT: a phantom study using texture analysis. Abdom Radiol (NY) 2018; 43:1432-1438. [PMID: 28840294 DOI: 10.1007/s00261-017-1309-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE To apply texture analysis (TA) in computed tomography (CT) of urinary stones and to correlate TA findings with the number of required shockwaves for successful shock wave lithotripsy (SWL). MATERIALS AND METHODS CT was performed on thirty-four urinary stones in an in vitro setting. Urinary stones underwent SWL and the number of required shockwaves for disintegration was recorded. TA was performed after post-processing for pixel spacing and image normalization. Feature selection and dimension reduction were performed according to inter- and intrareader reproducibility and by evaluating the predictive ability of the number of shock waves with the degree of redundancy between TA features. Three regression models were tested: (1) linear regression with elimination of colinear attributes (2), sequential minimal optimization regression (SMOreg) employing machine learning, and (3) simple linear regression model of a single TA feature with lowest squared error. RESULTS Highest correlations with the absolute number of required SWL shockwaves were found for the linear regression model (r = 0.55, p = 0.005) using two weighted TA features: Histogram 10th Percentile, and Gray-Level Co-Occurrence Matrix (GLCM) S(3, 3) SumAverg. Using the median number of required shockwaves (n = 72) as a threshold, receiver-operating characteristic analysis showed largest area-under-the-curve values for the SMOreg model (AUC = 0.84, r = 0.51, p < 0.001) using four weighted TA features: Histogram 10th Percentile, and GLCM S(1, 1) InvDfMom, S(3, 3) SumAverg, and S(4, -4) SumVarnc. CONCLUSION Our in vitro study illustrates the proof-of-principle of TA of urinary stone CT images for predicting the success of stone disintegration with SWL.
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Advanced non-contrasted computed tomography post-processing by CT-Calculometry (CT-CM) outperforms established predictors for the outcome of shock wave lithotripsy. World J Urol 2018; 36:2073-2080. [PMID: 29845319 DOI: 10.1007/s00345-018-2348-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/18/2018] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVES To evaluate the predictive value of advanced non-contrasted computed tomography (NCCT) post-processing using novel CT-calculometry (CT-CM) parameters compared to established predictors of success of shock wave lithotripsy (SWL) for urinary calculi. MATERIALS AND METHODS NCCT post-processing was retrospectively performed in 312 patients suffering from upper tract urinary calculi who were treated by SWL. Established predictors such as skin to stone distance, body mass index, stone diameter or mean stone attenuation values were assessed. Precise stone size and shape metrics, 3-D greyscale measurements and homogeneity parameters such as skewness and kurtosis, were analysed using CT-CM. Predictive values for SWL outcome were analysed using logistic regression and receiver operating characteristics (ROC) statistics. RESULTS Overall success rate (stone disintegration and no re-intervention needed) of SWL was 59% (184 patients). CT-CM metrics mainly outperformed established predictors. According to ROC analyses, stone volume and surface area performed better than established stone diameter, mean 3D attenuation value was a stronger predictor than established mean attenuation value, and parameters skewness and kurtosis performed better than recently emerged variation coefficient of stone density. Moreover, prediction of SWL outcome with 80% probability to be correct would be possible in a clearly higher number of patients (up to fivefold) using CT-CM-derived parameters. CONCLUSIONS Advanced NCCT post-processing by CT-CM provides novel parameters that seem to outperform established predictors of SWL response. Implementation of these parameters into clinical routine might reduce SWL failure rates.
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CT-calculometry (CT-CM): advanced NCCT post-processing to investigate urinary calculi. World J Urol 2017; 36:117-123. [DOI: 10.1007/s00345-017-2092-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/19/2017] [Indexed: 10/18/2022] Open
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Hevia M, García Á, Ancizu F, Merino I, Velis J, Tienza A, Algarra R, Doménech P, Diez-Caballero F, Rosell D, Pascual J, Robles J. Predicting the effectiveness of extracorporeal shock wave lithotripsy on urinary tract stones. Risk groups for accurate retreatment. Actas Urol Esp 2017; 41:451-457. [PMID: 28268076 DOI: 10.1016/j.acuro.2016.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/20/2016] [Accepted: 12/21/2016] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Extracorporeal shock wave lithotripsy (ESWL) is a non-invasive, safe and effective treatment for urinary tract lithiasis. Its effectiveness varies depending on the location and size of the stones as well as other factors; several sessions are occasionally required. The objective is to attempt to predict its success or failure, when the influential variables are known beforehand. MATERIAL AND METHODS We analysed 211 patients who had had previous CT scans and were treated with ESWL between 2010 and 2014. The influential variables in requiring retreatment were studied using binary logistic regression models (univariate and multivariate analysis): maximum density, maximum diameter, area, location, disintegration and distance from the adipose panniculus. With the influential variables, a risk model was designed by assessing all possible combinations with logistic regression (version 20.0 IBM SPSS). RESULTS The independent influential variables on the need for retreatment are: maximum density >864HU, maximum diameter >7.5mm and pyelocaliceal location. Using these variables, the best model includes 3risk groups with a probability of requiring significantly different retreatment: group 1-low risk (0 variables) with 20.2%; group 2-intermediate risk (1-2 variables) with 49.2%; and group 3-high risk (3 variables) with 62.5%. CONCLUSIONS The density, maximum diameter and pyelocaliceal location of the stones are determinant factors in terms of the effectiveness of treatment with ESWL. Using these variables, which can be obtained in advance of deciding on a treatment, the designed risk model provides a precise approach in choosing the most appropriate treatment for each particular case.
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Computed tomography findings predicting the success of silodosin for medical expulsive therapy of ureteral stones. Kaohsiung J Med Sci 2017; 33:290-294. [DOI: 10.1016/j.kjms.2017.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 11/23/2022] Open
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Waqas M, Ayaz Khan M, Waqas Iqbal M, Akbar MK, Saqib IUD, Akhter S. Non-Contrast Computed Tomography Scan Based Parameters of Ureteric Stones Affecting the Outcome of Extracorporeal Shock Wave Lithotripsy. Cureus 2017; 9:e1227. [PMID: 28589076 PMCID: PMC5459557 DOI: 10.7759/cureus.1227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Objective To compare the non-contrast computed tomography (NCCT) scan-based parameters of ureteric stones affecting the outcome of extracorporeal shock wave lithotripsy (ESWL). Materials and methods We retrospectively evaluated the pre-procedure NCCT of 74 patients who had ESWL for solitary ureteric calculi of 5-20 mm in diameter. We assessed the age, sex, basal metabolic index (BMI), laterality, location, presence of double 'J' (DJ) stent, skin to stone distance (SSD), stone maximum diameter, Hounsfield unit (HU), Hounsfield density (HD), area, and volume. All those who had no stone on follow-up imaging within 30 days were declared successful while those who had residual stone were declared failures. Results The overall success rate was 78% (58/74). Sixty (81.1%) patients were male. The success of ESWL was correlated with lower SSD, Hounsfield units (HU) and Hounsfield density (HD). However, in multivariate analysis, SSD, Hounsfield unit, and stone area showed correlation with success of procedure but Hounsfield density failed to show correlation. The success rate in patients with stone HU <500, 500-1000 and >1000 were 93.9%, 69%, and 58.3%, respectively. Patients with lower BMI (<30 kg/m2) and HD (<76 HU/mm) were more prone towards success of the procedure than those with higher BMI (>30 kg/m2) and higher HD (>76 HU/mm). Conclusion BMI, SSD, stone Hounsfield units and Hounsfield unit density were strong predictors of outcome of ESWL for ureteric stone.
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Affiliation(s)
- Muhammad Waqas
- Department of Urology, Shifa International Hospital, Islamabad, Pakistan
| | - Mohammad Ayaz Khan
- Department of Urology, Shifa International Hospital, Islamabad, Pakistan
| | | | - Mian Khalid Akbar
- Department of Urology, Shifa International Hospital, Islamabad, Pakistan
| | - Imad-Ud-Din Saqib
- Department of Plastic Surgery, Shifa International Hospital, Islamabad, Pakistan
| | - Saeed Akhter
- Department of Urology, Shifa International Hospital, Islamabad, Pakistan
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Abdelhamid M, Mosharafa AA, Ibrahim H, Selim HM, Hamed M, Elghoneimy MN, Salem HK, Abdelazim MS, Badawy H. A Prospective Evaluation of High-Resolution CT Parameters in Predicting Extracorporeal Shockwave Lithotripsy Success for Upper Urinary Tract Calculi. J Endourol 2016; 30:1227-1232. [PMID: 27597174 DOI: 10.1089/end.2016.0364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
| | | | - Hamdy Ibrahim
- Department of Urology, Fayoum University, Fayuom, Egypt
| | - Hany M. Selim
- Department of Urology, Cairo University, Cairo, Egypt
| | - Mohamed Hamed
- Department of Urology, Fayoum University, Fayuom, Egypt
| | | | | | | | - Hesham Badawy
- Department of Urology, Cairo University, Cairo, Egypt
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