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Bush N, Chandragiri P, Gaurav NA, Sonaiya S, Lahooti I, Singh A, Gupta A, Afghani E, Papachristou G, Khashab MA, Lee PJ, Talukdar R, Lakhtakia S, Singh VK, Han S, Tandan M, Akshintala VS. Development of a novel CT-based index for predicting the number of extracorporeal shockwave lithotripsy (ESWL) sessions required for successful fragmentation of obstructing pancreatic duct stones. Pancreatology 2024; 24:643-648. [PMID: 38584052 DOI: 10.1016/j.pan.2024.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 03/19/2024] [Accepted: 03/26/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND & AIM Extracorporeal shock wave lithotripsy (ESWL) is used for the treatment of pancreatic duct stones (PDS) in patients with chronic pancreatitis (CP). We aimed to develop a CT based index to predict the required number of ESWL sessions for technical success. METHODS We retrospectively evaluated patients with PDS secondary to CP who underwent ESWL. Technical success was defined as the complete fragmentation of stones to <3 mm. CT features including PDS size, number, location, and density in Hounsfield units (HU) were noted. We analyzed the relationship between PDS characteristics and the number of ESWL sessions required for technical success. A multiple linear regression model was used to combine size and density into the pancreatic duct stone (PDS) index that was translated into a web-based calculator. RESULTS There were 206 subjects (mean age 38.6 ± 13.7 years, 59.2% male) who underwent ESWL. PDS size showed a moderate correlation with the number of ESWL sessions (r = 0.42, p < 0.01). PDS in the head required a fewer number of sessions in comparison to those in the body (1.4 ± 0.6 vs. 1.6 ± 0.7, p = 0.01). There was a strong correlation between PDS density and the number of ESWL sessions (r = 0.617, p-value <0.01). The PDS index {0.3793 + [0.0009755 x PDS density (HU)] + [0.02549 x PDS size (mm)]} could accurately predict the required number of ESWL sessions with an AUC of 0.872 (p < 0.01). CONCLUSION The PDS index is a useful predictor of the number of ESWL sessions needed for technical success that can help in planning and patient counseling.
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Affiliation(s)
- Nikhil Bush
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Praneeth Chandragiri
- Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Nitish Ashok Gaurav
- Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Sneh Sonaiya
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Ila Lahooti
- Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Anmol Singh
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Abhinav Gupta
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Elham Afghani
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Georgios Papachristou
- Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Mouen A Khashab
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Peter J Lee
- Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Rupjyoti Talukdar
- Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Sundeep Lakhtakia
- Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Vikesh K Singh
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Samuel Han
- Division of Gastroenterology, Hepatology, and Nutrition, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Manu Tandan
- Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Venkata S Akshintala
- Pancreatitis Center, Division of Gastroenterology, Johns Hopkins Medical Institutions, Baltimore, MD, USA.
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Singh N, Agarwal S, Sarpal R. Prospective Evaluation of Extracorporeal Shockwave Lithotripsy in Renal and Upper Ureteric Stone Treatment: Clinical Assessment and Results. Cureus 2024; 16:e61102. [PMID: 38800778 PMCID: PMC11128184 DOI: 10.7759/cureus.61102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2024] [Indexed: 05/29/2024] Open
Abstract
INTRODUCTION Extracorporeal shockwave lithotripsy (ESWL) is a widely accepted non-invasive treatment for renal and upper ureteric stones smaller than 2 cm due to its safety and efficacy. Despite advancements in minimally invasive techniques, extracorporeal shockwave lithotripsy remains an important modality. AIMS AND OBJECTIVE This prospective observational study aimed to evaluate the outcomes of ESWL in managing renal and upper ureteric stones measuring less than 2 cm in terms of stone clearance. MATERIAL AND METHODS In a study conducted at a university-affiliated tertiary care hospital, 119 patients with renal and upper ureteric stones underwent extracorporeal shockwave lithotripsy over a 12-month period. Data on patient demographics, stone characteristics, treatment procedures, and complications were collected. Follow-up assessments were performed at two-week intervals for up to two months post-treatment. RESULTS The mean age of patients was 39.78 years, with a mean stone size of 1.2 cm. Right kidney stones were more prevalent (61.3% [n=76]). Complications included fever (19.3% [n=23]), gross haematuria (24.3% [n=29]), and steinstrasse (21.8% [n=26]). The success rate of extracorporeal shockwave lithotripsy was 81.5% (n=97), with 18.5% (n=22) of patients requiring surgical intervention due to incomplete fragmentation or residual fragments >4 mm. Stone size and density played significant roles in treatment success. CONCLUSION Despite advancements in minimally invasive techniques, ESWL retains its significance as a noninvasive and effective treatment option for renal and upper ureteric stones smaller than 2 cm. Its success depends on various factors, including the stone site, size, and composition. ESWL offers advantages such as minimal morbidity, shorter hospital stays, and better patient compliance. Complications such as steinstrasse are manageable with conservative measures or ancillary procedures. While ESWL may be losing ground in some cases, its noninvasive nature and favourable outcomes make it a valuable option in the armamentarium for stone management.
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Affiliation(s)
- Nimisha Singh
- General Surgery, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, IND
- Plastic and Reconstructive Surgery, Jawaharlal Nehru Medical College (JNMC) Aligarh Muslim University (AMU), Aligarh, IND
| | - Shikhar Agarwal
- Urology, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, IND
| | - Rajeev Sarpal
- Urology, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Dehradun, IND
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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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Owen K, Joe W, Ivander A, Palgunadi IN, Adhyatma KP. Role of Noncontrast Computed Tomography Parameters in Predicting the Outcome of Extracorporeal Shock Wave Lithotripsy for Upper Urinary Stones Cases: A Meta-analysis. Acad Radiol 2023:S1076-6332(23)00556-1. [PMID: 37985292 DOI: 10.1016/j.acra.2023.10.021] [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: 08/31/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 11/22/2023]
Abstract
RATIONALE Extracorporeal shock wave lithotripsy (ESWL) is widely considered the primary approach for managing urinary tract stones. This study aimed to assess the predictive factors associated with non-contrast computed tomography (NCCT)-based parameters of upper urinary stones in relation to the outcomes of ESWL. MATERIALS AND METHODS A systematic search was conducted in PubMed, ScienceDirect, Web of Science, and Cochrane Library to identify all relevant studies published up to June 3, 2023. Several NCCT-based parameters to predict ESWL outcomes, comprised of mean stone density (MSD), skin-to-stone distance (SSD), and stone size, were extracted and analyzed using Review Manager software. RESULTS Out of 979 publications screened, a total of 39 publications, involving 7869 patients, were enrolled in the analysis. The pooled estimate demonstrated significant differences between MSD, and stone size between successful and failure of stone fragmentation groups, in which lower values of these parameters are associated with successful ESWL outcomes. CONCLUSION The results from the current study suggested that lower NCCT parameters, notably MSD, SSD, and stone size, are significantly associated with successful ESWL outcome. However, additional large-scale prospective studies are required to utilize these parameters effectively, and the optimal cutoff value should be determined.
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Affiliation(s)
- Kevin Owen
- Bangli General Hospital, Bangli, Indonesia (K.O.).
| | - Wilbert Joe
- Regional Public Hospital dr.M. Thomsen Nias, Gunungsitoli, Indonesia (W.J.)
| | - Alvin Ivander
- Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia (A.I.)
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Neubauer J, Wilhelm K, Gratzke C, Bamberg F, Reisert M, Kellner E. Effect of surface-partial-volume correction and adaptive threshold on segmentation of uroliths in computed tomography. PLoS One 2023; 18:e0286016. [PMID: 37352326 PMCID: PMC10289361 DOI: 10.1371/journal.pone.0286016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 05/06/2023] [Indexed: 06/25/2023] Open
Abstract
Computed tomography (CT) is used to diagnose urolithiasis, a prevalent condition. In order to establish the strongest foundation for the quantifiability of urolithiasis, this study aims to develop semi-automated urolithiasis segmentation methods for CT images that differ in terms of surface-partial-volume correction and adaptive thresholding. It also examines the diagnostic accuracy of these methods in terms of volume and maximum stone diameter. One hundred and one uroliths were positioned in an anthropomorphic phantom and prospectively examined in CT. Four different segmentation methods were developed and used to segment the uroliths semi-automatically based on CT images. Volume and maximum diameter were calculated from the segmentations. Volume and maximum diameter of the uroliths were measured independently by three urologists by means of electronic calipers. The average value of the urologists´ measurements was used as a reference standard. Statistical analysis was performed with multivariate Bartlett's test. Volume and maximum diameter were in very good agreement with the reference measurements (r>0.99) and the diagnostic accuracy of all segmentation methods used was very high. Regarding the diagnostic accuracy no difference could be detected between the different segmentation methods tested (p>0.55). All four segmentation methods allow for accurate characterization of urolithiasis in CT with respect to volume and maximum diameter of uroliths. Thus, a simple thresholding approach with an absolute value may suffice for robust determination of volume and maximum diameter in urolithiasis.
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Affiliation(s)
- Jakob Neubauer
- Department of Diagnostic and Interventional Radiology, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
| | - Konrad Wilhelm
- Department of Urology, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
| | - Christian Gratzke
- Department of Urology, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
| | - Fabian Bamberg
- Department of Diagnostic and Interventional Radiology, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
| | - Marco Reisert
- Medical Physics, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
- Department of Stereotactic and Functional Neurosurgery, Medical Center – University of Freiburg, Freiburg, Germany
| | - Elias Kellner
- Medical Physics, Faculty of Medicine, Medical Center – University of Freiburg, Freiburg, Germany
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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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Garg M, Johnson H, Lee SM, Rai BP, Somani B, Philip J. Role of Hounsfield Unit in Predicting Outcomes of Shock Wave Lithotripsy for Renal Calculi: Outcomes of a Systematic Review. Curr Urol Rep 2023; 24:173-185. [PMID: 36802317 PMCID: PMC10038959 DOI: 10.1007/s11934-023-01145-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2022] [Indexed: 02/23/2023]
Abstract
PURPOSE OF REVIEW Extracorporeal shock wave lithotripsy success rates depend on several stone and patient-related factors, one of which is stone density which is calculated on computed tomography scan in Hounsfield Units. Studies have shown inverse correlation between SWL success and HU; however, there remains considerable variation between studies. We performed a systematic review regarding the use of HU in SWL for renal calculi to consolidate the current evidence and address current knowledge gaps. RECENT FINDINGS Database including MEDLINE, EMBASE, and Scopus were searched from inception through August 2022. Studies in English language analysing stone density/attenuation in adult patients undergoing SWL for renal calculi were included for assessment of Shockwave lithotripsy outcomes, use of stone attenuation to predict success, use of mean and peak stone density and Hounsfield unit density, determination of optimum cut-off values, nomograms/scoring systems, and assessment of stone heterogeneity. 28 studies with a total of 4,206 patients were included in this systematic review with sample size ranging from 30 to 385 patients. Male to female ratio was 1.8, with an average age of 46.3 years. Mean overall ESWL success was 66.5%. Stone size ranged from 4 to 30 mm in diameter. Mean stone density was used by two-third of the studies to predict the appropriate cut-off for SWL success, ranging from 750 to 1000 HU. Additional factors such as peak HU and stone heterogeneity index were also evaluated with variable results. Stone heterogeneity index was considered a better indicator for success in larger stones (cut-off value of 213) and predicting SWL stone clearance in one session. Prediction scores had been attempted, with researchers looking into combining stone density with other factors such as skin to stone distance, stone volume, and differing heterogeneity indices with variable results. Numerous studies demonstrate a link between shockwave lithotripsy outcomes and stone density. Hounsfield unit < 750 has been found to be associated with shockwave lithotripsy success, with likelihood of failure strongly associated with values over 1000. Prospective standardisation of Hounsfield unit measurement and predictive algorithm for shockwave lithotripsy outcome should be considered to strengthen future evidence and help clinicians in the decision making. TRIAL REGISTRATION International Prospective Register of Systematic Reviews (PROSPERO) database: CRD42020224647.
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Affiliation(s)
- Megha Garg
- Bristol Urological Institute, North Bristol NHS Trust, West bury-on-Trym, Bristol, BS10 5NB UK
| | - Hans Johnson
- Bristol Urological Institute, North Bristol NHS Trust, West bury-on-Trym, Bristol, BS10 5NB UK
| | - Su-min Lee
- Bristol Urological Institute, North Bristol NHS Trust, West bury-on-Trym, Bristol, BS10 5NB UK
| | | | - Bhaskar Somani
- University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Joe Philip
- Bristol Urological Institute, North Bristol NHS Trust, West bury-on-Trym, Bristol, BS10 5NB UK
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Bulut M, Dinçer E, Coşkun A, Can U, Telli O. Is Triple D Score Effective to Predict the Stone-Free Rate After Shockwave Lithotripsy in Pediatric Population? J Endourol 2023; 37:207-211. [PMID: 36094110 DOI: 10.1089/end.2022.0349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Introduction: Triple D score was developed using skin-to-stone distance (SSD), stone density (SD), and stone volume (SV) for prediction of extracorporeal shockwave lithotripsy (SWL) outcomes in adults. SWL is the first-line treatment method for kidney stones <2 cm in children, however, it was not validated in the pediatric population. This article aims to validate Triple D score in pediatric patients. Materials and Methods: Of the 269 children treated with SWL between 2007 and 2021, a total of 147 children who had adequate follow-up data and evaluated with noncontrast CT before SWL were included in the study. Parameters were calculated for each of the SV, SSD, and SD variables. Receiver operator characteristic analysis was used to set cutoff values. Triple D scores were calculated, and success rates were determined for each score. Stone-free status was determined as complete clearance after 3 months of final SWL. Results: The median age of the study group was 7 years (range 1-16). Ninety-three of the 147 (63%) children had stone-free status. Mean SV, SSD, and SD values were significantly higher in the SWL-failed group than in the stone-free group after detecting cutoff values of 155 mm3, 6.5 cm, and 550 HU, respectively. Stone-free rates were detected as 23.8%, 35.1%, 74.0%, and 92.0% with the Triple D scores of 0, 1, 2, and 3 points. Conclusions: Our study confirms that Triple D scores support the SWL outcomes in the pediatric population. We believe that our research on Triple D score validation in children is of great clinical importance although various factors may affect to predict the success of SWL. IRB Approval: 2021/514/194/14.
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Affiliation(s)
- Mehmet Bulut
- Clinic of Urology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
| | - Erdinç Dinçer
- Clinic of Urology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
| | - Alper Coşkun
- Clinic of Urology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
| | - Utku Can
- Clinic of Urology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
| | - Onur Telli
- Clinic of Pediatric Urology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
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10
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Ibrahim A, Elatreisy A, Khogeer A, Ahmadi A, Mishra S, Faisal M, Sabnis R, Aube-Peterkin M, Carrier S, Ganpule A, Desai M. Can we predict the ancillary treatments after extracorporeal shockwave lithotripsy for renal and upper ureteral stones? Arch Ital Urol Androl 2022; 94:439-442. [PMID: 36576455 DOI: 10.4081/aiua.2022.4.439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 12/05/2022] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE To quantify the predictors for the ancillary treatments after extracorporeal shock wave lithotripsy (SWL) for renal and upper ureteral stones. MATERIALS AND METHODS From January 2014 to January 2017, patients undergoing SWL using an electromagnetic lithotripter machine (Compact Delta; Dornier MedTech GmbH, Wessling, Germany) for renal and upper ureteral stones ≤ 20 mm were retrospectively reviewed. All patients underwent CT urography prior to SWL. The cohort was subdivided into three groups according to stone attenuation values in Hounsfield Units (HU). Group I; HU < 500 (n = 20), group II; HU 500-1000 (n = 51) and group III; HU ≥ 1000 (n = 180). The parameters included for multivariate analysis were stone size, location, multiplicity, stone attenuation value, number of shocks and stone clearance rate by 3 months. The ancillary treatments were ureteroscopy (URS), ureteral stenting and hospital readmission for pain or fever. RESULTS A total of 251 patients were included in the study. The overall SWL success rate was 92.4%. Mean stone size was 10.9 ± 2.1, 11.6 ± 3 and 11.4 ± 3.6 mm and mean stone attenuation values were 364 ± 125, 811 ± 154 and 1285 ± 171 HU for groups I, II and III respectively. The stone clearance rates by 3 months were 96%, 92% and 88.4% for groups I, II and III respectively. On subgroup analysis, group III required ancillary treatments in 70% of patients whereas group I, II, did not require any ancillary treatments. On multivariate analysis, stone multiplicity, stone location (lower calyceal stones) and HU were independent significant predictors for the need for ancillary treatments after SWL (p values < 0.05). CONCLUSIONS Patients with stone attenuation value (HU) > 1000, multiple stones and/or lower calyceal stones have higher risk to necessitate ancillary treatments after SWL. These patients would likely benefit from upfront endoscopic lithotripsy for treating symptomatic renal or upper ureteral stones.
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Affiliation(s)
| | | | - Abdulghani Khogeer
- Department of Surgery, Faculty of Medicine, Rabigh, King Abdulaziz University, Jeddah.
| | | | | | | | | | - Melanie Aube-Peterkin
- Department of Surgery, Division of Urology, McGill University Health Center, Montreal QC.
| | - Serge Carrier
- Department of Surgery, Division of Urology, McGill University Health Center, Montreal QC.
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11
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Pancreatic Stones and Extracorporeal Shockwave Lithotripsy: A Review of the Literature. Pancreas 2022; 51:916-922. [PMID: 36607935 DOI: 10.1097/mpa.0000000000002129] [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: 01/07/2023]
Abstract
ABSTRACT Pancreatic stones are sequelae of chronic pancreatitis, resulting in poor quality of life, frequent hospitalizations, and a significant economic burden. Extracorporeal shock wave lithotripsy (ESWL) can be used to treat pancreatic stones and is less invasive when compared to other modalities. In this review article, we have discussed the role of ESWL in the treatment of pancreatic stones and how it differs from other modalities. Databases were searched electronically for articles discussing the treatment of pancreatic ductal stones by ESWL or other modalities. Articles discussing or comparing treatment success rates were preferentially included. An inductive approach was used to identify articles related to the treatment of pancreatic stones with ESWL throughout the review process. Although laser lithotripsy and electrohydraulic lithotripsy appear to have higher success rates, the potential for ESWL to affect clinical outcomes is substantial, especially in individuals with a higher risk for invasive procedures. The decision to perform ESWL should be considered if the outcome will substantially alter the clinical management when performed by an experienced endoscopist. Further randomized controlled trials are needed to compare ESWL and peroral pancreatic lithotripsy methods.
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12
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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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13
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Hashem A, El-Assmy AM, Sharaf DE, Elgamal M, Elzalouey AE, Laymon M. A randomized trial of adjuvant tamsulosin as a medical expulsive therapy for renal stones after shock wave lithotripsy. Urolithiasis 2022; 50:473-480. [DOI: 10.1007/s00240-022-01330-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 04/26/2022] [Indexed: 11/28/2022]
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14
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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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Akinci A, Akpinar C, Babayigit M, Karaburun MC, Soygur T, Burgu B. Predicting ESWL success by determination of Hounsfield unit on non-contrast CT is clinically irrelevant in children. Urolithiasis 2022; 50:223-228. [PMID: 35072732 DOI: 10.1007/s00240-022-01306-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/14/2022] [Indexed: 11/24/2022]
Abstract
The necessity of determining stone density by non-contrast computerized tomography (NCCT) before extracorporeal shock wave lithotripsy (ESWL) is a controversial topic due to the radiation exposure. We aimed to investigate whether stone density is helpful in predicting the success of ESWL in pediatric patients or not. In this retrospective study, database of a single center was used to identify 232 children aged between 2 and 16 years. Patients with abnormal renal anatomy, distal obstruction, a known cystine stone disease, a previous history of an intervention regarding stone, and an insufficient follow-up period (< 3 months) were excluded from the study. A total of 209 patients were included in the study (94 with NCCT, 115 without NCCT). Groups were compared in terms of stone size, stone location, and stone-free rate at 3 months after a single ESWL session. The mean age was 6.17 ± 3.27 years and 120 (57.4%) of the patients were male and 89 (42.6%) were female. Mean stone size was 11.7 mm in NCCT group and 12.3 mm in non-NCCT group (p 0.128). The complete stone clearance rate in NCCT and non-NCCT group at 3 months after ESWL was 57.4% (54/94) and 54.7% (63/115), respectively, and there was no statistically significant difference (p 0.316). In conclusion, unnecessary NCCT use should be avoided before ESWL considering the similar success rates after ESWL and the risk of exposure to radiation.
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Affiliation(s)
- Aykut Akinci
- Department of Pediatric Urology, Ankara University School of Medicine, Cebeci Children's Hospital, Ankara, Turkey.
| | - Cagri Akpinar
- Department of Urology, Cubuk State Hospital, Ankara, Turkey
| | - Muammer Babayigit
- Department of Urology, Ankara University School of Medicine, Ankara, Turkey
| | | | - Tarkan Soygur
- Department of Pediatric Urology, Ankara University School of Medicine, Cebeci Children's Hospital, Ankara, Turkey
| | - Berk Burgu
- Department of Pediatric Urology, Ankara University School of Medicine, Cebeci Children's Hospital, Ankara, Turkey
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Nagla S, Abou-Farha M, El-Abd A, Gameel T, Eltatawy H. Efficacy of extracorporeal shockwave lithotripsy, with modified position of the machine head in the treatment of lower calyceal stones in obese patients. Urol Ann 2022; 14:81-84. [PMID: 35197708 PMCID: PMC8815349 DOI: 10.4103/ua.ua_176_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 03/12/2021] [Indexed: 11/21/2022] Open
Abstract
Context: Extracorporeal shock wave lithotripsy (ESWL) has inferior results in the lower calyceal stones, especially in obese patients. Aims: This study aimed at evaluating of the efficacy of extracorporeal shockwave lithotripsy, with modified position of the machine head in the treatment of single lower calyceal stones in obese patients. Settings and Design: This was a prospective study (phase IV trial). Subjects and Methods: We studied the anterior rotation of the shock wave machine head in obese patients for the treatment of lower calyx stones. From February 2015 to June 2019, 105 obese patients (body mass index [BMI] ≥35) having lower calyx stones (≤20 mm) underwent ESWL at our institute. The procedure was done in a supine position, and the head of the shock-wave machine was tilted anteriorly. ESWL was considered successful if the kidney was completely cleared of stones. Statistical Analysis Used: The statistical methods used were descriptive statistics, mean, standard deviation frequency analysis, Chi-square test, unpaired t-test test, and Pearson correlations (r). Results: The mean BMI of these patients was 39.71 ± 2.8 kg/m2, the mean stone size was 17.4 ± 2.1 mm, the mean stone density was 767.1 ± 193.4 Hounsfield unit, and the mean of skin to stone distance (SSD) was 145.4 ± 4.5 mm. ESWL was successful in 86 (81.9%) patients; 13 patients (12.4%) showed complete success after the first session, while 37 (35.2%), 25 (23.8%), and 11 (10.5%) patients showed success after the second, third, and fourth sessions, respectively. ESWL failed in 19 (19.1%) cases. The success rate decreased significantly with higher stone density and SSD (P < 0.001), with negative correlations (r values) of −0.871 and −0.811, respectively. Conclusions: Anterior rotation of the head of the shock wave machine is a suitable option for the treatment of lower calyceal stones in obese patients.
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Kocakgol H, Aydin HR, Guctas AO, Sekerci CA, Ozturk Kocakgol D, Aksoy HZ, Tanidir Y, Kocakgol H. Outcomes of fluoroscopy-free retrograde intrarenal surgery and predictive factors of stone-free. Arch Ital Urol Androl 2021; 93:425-430. [PMID: 34933538 DOI: 10.4081/aiua.2021.4.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 10/28/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To evaluate the outcomes of flouroscopy-free retrograde intrarenal surgery (ffRIRS) and to investigate the factors that may affect stone-free rate. MATERIALS AND METHODS The charts of patients who underwent ffRIRS between January 2017 and August 2019 were reviewed retrospectively. Patients with missing preoperative imaging and patients with kidney anomalies were excluded from the study. Age, gender, stone size, stone localization, stone density, laterality, operation time, stone-free rate, complications and auxiliary procedures were recorded and analyzed. RESULTS Study group involved 44 (43.1%) female and 58 (56.8%) male patients. Stone-free rate in a single-session ffRIRS were found to be correlated with stone localization (p = 0.003), stone volume (p = 0.004), and stone density (p = 0.009) but not with age (p = 0.950). Patients with multiple calyceal stones and a stone burden over 520 mm3 were found to be less stone-free. The complication rate in female gender (n = 7) was significantly higher compared to male (n = 1) (p = 0.011). No major complications such as ureteral injury or avulsion were observed. Overall, 13 patients (12.7%) needed auxiliary procedures. The operation time seemed to be affected by stone size and gender (p = 0.005; p = 0.044, respectively). CONCLUSIONS Stone-free rate in ffRIRS were found to be affected by stone density, size, and localization. Patients with multiple caliceal stones and high stone burden (< 520 mm3) have been found to have low stone-free rate, so one can speculate that having fluoroscopy assistance in RIRS might help us to improve surgical success.
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Affiliation(s)
- Huseyin Kocakgol
- Department of Urology, University of Health Sciences, Erzurum Regional Training and Research Hospital, Erzurum.
| | - Hasan Riza Aydin
- Department of Urology, University of Health Sciences, Kanuni Training and Research Hospital, Trabzon.
| | - Ahmet Ozgur Guctas
- Department of Urology, Marmara University Training and Research Hospital, Istanbul.
| | - Cagri Akin Sekerci
- Department of Urology, Division of Pediatric Urology, School of Medicine, Marmara University, Istanbul.
| | | | - Hamit Zafer Aksoy
- Department of Urology, University of Health Sciences, Kanuni Training and Research Hospital, Trabzon.
| | - Yiloren Tanidir
- Department of Urology, School of Medicine, Marmara University, Istanbul.
| | - Huseyin Kocakgol
- Department of Urology, University of Health Sciences, Erzurum Regional Training and Research Hospital, Erzurum.
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18
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The effect of stone and patient characteristics in predicting extra-corporal shock wave lithotripsy success rate: A cross sectional study. Ann Med Surg (Lond) 2021; 70:102829. [PMID: 34540217 PMCID: PMC8441084 DOI: 10.1016/j.amsu.2021.102829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/05/2021] [Accepted: 09/05/2021] [Indexed: 11/20/2022] Open
Abstract
Introduction We determine the effect of patient characteristics (age, sex, and body mass index BMI) and stone characteristics (density, location, and size) by non-contrast computed tomography of the kidneys, ureters, and bladder (CT-KUB) in predicting the success of extracorporeal shock wave lithotripsy (ESWL) in the treatment of kidney and ureteric stones. We present this study to further enrich the knowledge of physicians towards the effect of different patient characteristics upon predicting extra-corporal shock wave lithotripsy success rates. Methods We evaluated 155 patients who received ESWL for renal and ureteric stone measuring 3–20 mm (mm), over a 3-month period. The stone size in millimeters, density in Hounsfield units (HU) and its location was determined on pre-treatment CT-KUB. ESWL was successful if post-treatment residual renal stone fragments were ≤3 mm and for ureteric stones should be totally cleared. Results The overall success of ESWL treatment was observed in 65.8% of the 155 patients. There was no significant difference seen when the effect of patients age, sex and BMI were studied with ESWL outcome with P values were 0.155, 0.101 and 0.415 respectively. Also, stone location either in the kidney or ureter has no statistically significant effect on ESWL response rate. while stone density and size determined on CT KUB have statistically significant effect on the success rate of ESWL with a P-value of 0.002 and 0.000 respectively. Conclusions This study shows that determination of stone density and stone size on CT KUB pre ESWL can help to predict the outcome of ESWL. We propose that stone density <500 HU and stone size < 5 mm are highly likely to result in successful ESWL. Previous studies have reported a wide variation of ESWL success rate ranging from 46% to 91%. Failure of ESWL results in unnecessary exposure of renal parenchyma to shock waves and complications like renal hematoma. Increasing Efforts have been made to determine factors that predict ESWL outcome and improve patients' selection.
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19
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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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Factors influencing extracorporeal shock wave lithotripsy efficiency for optimal patient selection. Wideochir Inne Tech Maloinwazyjne 2021; 16:409-416. [PMID: 34136039 PMCID: PMC8193744 DOI: 10.5114/wiitm.2021.103915] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 11/06/2020] [Indexed: 12/02/2022] Open
Abstract
Introduction Current literature suggests various predictors related to the stone and patient, which could influence stone fragmentation and clearance rates. Aim To establish clinical characteristics of stone disease for patients undergoing extracorporeal shockwave lithotripsy (ESWL) which may predict the success of the procedure. Material and methods One hundred and nine patients with renal stone disease diagnosed by non-contrast computed tomography (NCCT) who underwent ESWL between January 2015 and December 2019 were included in the study. Endpoints: patient being stone free (SF) or when < 4 mm fragments were detected. Age, gender, location, skin-to-stone distance, maximum stone length, stone volume, stone surface area, mean stone Hounsfield units (HU) and highest HU score were explored in uni- and multivariate regression analysis. Results Stone size revealed the highest prognostic power for ESWL failure, where OR for stone volume and stone surface area were 1.06 (1.03–1.10) and 1.04 (1.02–1.06), respectively (all p < 0.01) while a tendency was observed for skin-to-stone distance 1.02 (1.00–1.03). The amount of energy applied during the procedure to one cubic millimeter of stone volume (SMLI/stone volume) was predictive for treatment success (OR = 0.60, 95% CI: 0.41–0.87, p < 0.01). Stone volume (OR = 1.06, 95% CI: 1.00–1.14, p = 0.01) and stone surface area (OR = 1.03, 95% CI: 1.01–1.06, p = 0.02) remained as statistically significant prognostic factors for treatment failure. Conclusions Both greater stone volume and stone surface area, as well as lower power delivered per stone volume unit during the ESWL procedure, were found to be significant factors and could be useful to predict treatment failure.
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Disselhorst GW, Reimerink JJ, van der Vijgh RK, Sandkuyl R, Kauer PC, Reinhard R, Tjeenk Willink MM, Jensch S, van Haarst EP. Inter- and Intraobserver Agreement in Measuring Urolithiasis Density on Nonenhanced Computed Tomography. J Endourol 2020; 34:417-422. [DOI: 10.1089/end.2019.0811] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | | | | | - Rutger Sandkuyl
- Department of Urology, OLVG Hospital, Amsterdam, The Netherlands
| | - Paul C. Kauer
- Department of Urology, OLVG Hospital, Amsterdam, The Netherlands
| | - Rinze Reinhard
- Department of Radiology, OLVG Hospital, Amsterdam, The Netherlands
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22
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Kaya C, Kaynak Y, Karabag A, Aykaç A. The Predictive Role of Abdominal Fat Parameters and Stone Density on SWL Outcomes. Curr Med Imaging 2020; 16:80-87. [PMID: 31989897 DOI: 10.2174/1573405614666180927112127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 08/04/2018] [Accepted: 08/20/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Our aim was to detect the role of radiological abdominal fat parameters by tomography and stone density by plain X-ray on extracorporeal Shock Wave Lithotripsy (SWL) stone-free rate. METHODS The patients who had undergone SWL for a single opaque renal stone < 2 cm in diameter and proximal ureteric stone < 1 cm in diameter were collected retrospectively. The characteristics of patients and stones were recorded. The stone attitude, HU, abdominal fat parameters, paraperirenal fat area, perirenal infiltration and severity of hydronephrosis with pre-treatment Non- Contrast Computed Tomography (NCCT) and stone density with radiography were evaluated by a radiologist. Four weeks after the last SWL; all patients were evaluated by plain X-ray and categorized as Stone Free (SF) and Residual Fragment (RF) group. RESULTS 51 patients with renal stones and 88 patients with proximal ureteral stones were included in the study. 24 (47%) and 63 (71%) patients were classified as SFfor renal and ureteral stones respectively. Only stone size was an independent predictor for stone-free rates after SWL for renal and proximal ureteral stones on multivariate analysis. The Receiver Operating Characteristic (ROC) curves for renal calculi revealed that creatinine level, stone size, stone attitude, Houns-Field Unit (HU) and Skin-to-Stone Distance (SSD) were the predictive factors for the SWL outcome (p< 0.05). The ROC curve for ureteral calculi demonstrated that HU, stone size and attitude were the predictive factors (p< 0.05). CONCLUSION All abdominal fat parameters and the stone density were not related to SWL failure. A large follow-up with more patients is essential to confirm the role of radiological parameters on the outcome of SWL.
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Affiliation(s)
- Coskun Kaya
- Department of Urology, Eskisehir City Hospital, Eskisehir, Turkey
| | - Yurdaer Kaynak
- Department of Urology, Eskisehir Ümit Visnelik Hospital, Eskisehir, Turkey
| | - Aral Karabag
- Department of Radiology, Eskisehir City Hospital, Eskisehir, Turkey
| | - Aykut Aykaç
- Department of Urology, Medical School, Karabuk University, Karabuk, Turkey
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Gadelmoula M, Elderwy AA, Abdelkawi IF, Moeen AM, Althamthami G, Abdel-Moneim AM. Percutaneous nephrolithotomy versus shock wave lithotripsy for high-density moderate-sized renal stones: A prospective randomized study. Urol Ann 2019; 11:426-431. [PMID: 31649466 PMCID: PMC6798294 DOI: 10.4103/ua.ua_63_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Context: The management of renal stones of high density (>1000 Hounsfield units) on non-contrast computed tomography (NCCT), and moderate sized (15-25 mm) is still debatable. Aims: The aim of this study was to compare the outcomes of percutaneous nephrolithotomy (PCNL) and shock wave lithotripsy (SWL) for the high-density and moderate-sized renal stones regarding the stone-free rate (SFR), morbidity, and patients' quality of life. Settings and Design: This is a prospective randomized study. Patients and Methods: Eighty consecutive patients with renal stones, excluding those with lower calyceal stones, were randomized to receive either PCNL or SWL (40 in each arm). Patients were followed up by abdominal ultrasound and plain X-ray (NCCT if indicated) till clearance of stone. Outcomes, complications, costs, and SF-8 Health Survey scoring were recorded for each group. Statistical Analysis: We used Stata software, version 9.2 (Intercooled STATA®; StataCorp LP College Station, Texas, USA). Comparison of the two groups was made with regard to patient and stone criteria and the procedure details. Continuous variables were compared using the Mann–Whitney U-test with values shown as the median and interquartile range. Categorical variables were compared using the Pearson's Chi-square/Fisher's exact test. Multivariate logistic regression analysis was used to identify variables independently associated with the stone clearance after two sessions of SWL. P < 0.05 was considered statistically significant. Results: The basic characteristics of both groups were comparable. After a single treatment session, the SFR was 80% and 27.5% for PCNL and SWL, respectively (P < 0.001). The overall 3-month SFR was 87.5% versus 90%, respectively (P = 0.723). The median number of the required maneuvers was 1 (range: 1–3) for PCNL versus 2 (range: 1–4) for SWL (P < 0.001). The complication rate was 10% and 7.5%, respectively (P = 0.692). The cost of SWL was significantly lower (P < 0.001). On multivariate analysis, a single stone was an independent predictor for stone clearance after two sessions of SWL (odds ratio: 7.26, 95% confidence interval: 1.13–46.62, P = 0.037). Conclusions: PCNL for the dense, and moderate-sized renal stone provides higher initial success and lower re-treatment rates compared with SWL with comparable outcome after 3 months of therapy. However, SWL is an alternative, especially for a single stone.
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Affiliation(s)
- Mohamed Gadelmoula
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
| | - Ahmad A Elderwy
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
| | - Islam F Abdelkawi
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
| | - Ahmed M Moeen
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
| | - Ghaleb Althamthami
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
| | - Ahmed M Abdel-Moneim
- Department of Urology, Urology and Nephrology Hospital, Assiut University, Assiut, Egypt
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Cui HW, Silva MD, Mills AW, North BV, Turney BW. Predicting shockwave lithotripsy outcome for urolithiasis using clinical and stone computed tomography texture analysis variables. Sci Rep 2019; 9:14674. [PMID: 31604986 PMCID: PMC6788981 DOI: 10.1038/s41598-019-51026-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 08/14/2019] [Indexed: 11/09/2022] Open
Abstract
We aimed to develop and evaluate a statistical model, which included known pre-treatment factors and new computed tomography texture analysis (CTTA) variables, for its ability to predict the likelihood of a successful outcome after extracorporeal shockwave lithotripsy (SWL) treatment for renal and ureteric stones. Up to half of patients undergoing SWL may fail treatment. Better prediction of which cases will likely succeed SWL will help patients to make an informed decision on the most effective treatment modality for their stone. 19 pre-treatment factors for SWL success, including 6 CTTA variables, were collected from 459 SWL cases at a single centre. Univariate and multivariable analyses were performed by independent statisticians to predict the probability of a stone free (both with and without residual fragments) outcome after SWL. A multivariable model had an overall accuracy of 66% on Receiver Operator Curve (ROC) analysis to predict for successful SWL outcome. The variables most frequently chosen for the model were those which represented stone size. Although previous studies have suggested SWL can be reliably predicted using pre-treatment factors and that analysis of CT stone images may improve outcome prediction, the results from this study have not produced a useful model for SWL outcome prediction.
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Affiliation(s)
- Helen W Cui
- Oxford Stone Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom.
| | | | | | | | - Benjamin W Turney
- Oxford Stone Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
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Abstract
This comprehensive review updates the advances in extracorporeal lithotripsy, including improvements in external shockwave lithotripsy and innovations in ultrasound based lithotripsy, such as burst wave lithotripsy, ultrasonic propulsion, and histotripsy. Advances in endoscopic technology and training have changed the surgical approach to nephrolithiasis; however, improvements and innovations in extracorporeal lithotripsy maintain its status as an excellent option in appropriately selected patients.
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Affiliation(s)
- Tim Large
- Department of Urology, Indiana University, Methodist Hospital, 1801 Senate Boulevard, Suite 220, Indianapolis, IN 46202, USA
| | - Amy E Krambeck
- Department of Urology, Indiana University, Methodist Hospital, 1801 Senate Boulevard, Suite 220, Indianapolis, IN 46202, USA.
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Liu R, Su W, Wang J, Gong J, Lu J. Quantitative factors of unenhanced CT for predicting fragmenting efficacy of extracorporeal shock wave lithotripsy on pancreatic duct stones. Clin Radiol 2019; 74:408.e1-408.e7. [PMID: 30808501 DOI: 10.1016/j.crad.2019.01.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 01/23/2019] [Indexed: 10/27/2022]
Abstract
AIM To find potential predictors at unenhanced computed tomography (CT) to evaluate the stone clearance rate (SCR) of pancreatic duct stones (PDS) by extracorporeal shock wave lithotripsy (ESWL). MATERIALS AND METHODS A total of 106 consecutive patients with multiple stones of maximal transverse length (MTL) 0.3-3.6 cm in pancreatic head region were enrolled. Unenhanced CT was performed both before and after ESWL therapy. All patients underwent ESWL therapy using an electromagnetic lithotripter, and were divided into three groups with threshold values of >90%, 50-90% and <50% of SCR. Factors including sex, age, MTL, mean stone density (MSD), standard deviation of stone density (SDSD), variation coefficient of stone density (VCSD), attenuation density (AD), pancreatic duct diameter (PDD), skin-to-stone distance (SSD), and number of ESWL sessions were analysed, and their impact on SCR was evaluated by univariate and multivariate analyses. The diagnostic threshold of the independent predicting index was further calculated, and its relationship with SCR and ESWL was analysed by drawing a trend line. RESULTS The only significant predictor of SCR by ESWL was MSD (p<0.05). More courses of ESWL therapy are required in PDS patients with an MSD higher than the cut-off value of 375.4 HU (mean, 2.6 versus 1.8), but with a relatively lower SCR (mean, 43.96 versus 88.68%) . CONCLUSION MSD on pre-treatment unenhanced CT is an independent predictor for SCR of PDS patients treated with ESWL. Using a cut-off value of 375.4 HU, patients with low MSD are good candidates for ESWL therapy.
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Affiliation(s)
- R Liu
- Department of Radiology, Changhai Hospital Affiliated to the Second Military Medical University, Changhai Road 168, Yangpu District, Shanghai, 200433 PR China
| | - W Su
- Department of Nuclear Medicine, Changhai Hospital Affiliated to the Second Military Medical University, Changhai Road 168, Yangpu District, Shanghai, 200433 PR China
| | - J Wang
- Department of Radiology, Changhai Hospital Affiliated to the Second Military Medical University, Changhai Road 168, Yangpu District, Shanghai, 200433 PR China
| | - J Gong
- Department of Radiology, Changhai Hospital Affiliated to the Second Military Medical University, Changhai Road 168, Yangpu District, Shanghai, 200433 PR China.
| | - J Lu
- Department of Radiology, Changhai Hospital Affiliated to the Second Military Medical University, Changhai Road 168, Yangpu District, Shanghai, 200433 PR China.
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Rathee VS, HC V, Khan SW, Singh AK, Shukla PK, Verma A, Trivedi S, Dwivedi US. Role of computed tomography morphodensitometry in predicting the outcome of shock wave lithotripsy. JOURNAL OF CLINICAL UROLOGY 2018. [DOI: 10.1177/2051415818764539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
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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Affiliation(s)
- Vazir Singh Rathee
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Vivek HC
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Sartaj Wali Khan
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - AK Singh
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Pushpendra Kumar Shukla
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Ashish Verma
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Sameer Trivedi
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
| | - Udai Shankar Dwivedi
- Department of Urology, Banaras Hindu University Institute of Medical Sciences, Varanasi, India
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Alsagheer G, Abdel-Kader MS, Hasan AM, Mahmoud O, Mohamed O, Fathi A, Abass M, Abolyosr A. Extracorporeal shock wave lithotripsy (ESWL) monotherapy in children: Predictors of successful outcome. J Pediatr Urol 2017; 13:515.e1-515.e5. [PMID: 28457667 DOI: 10.1016/j.jpurol.2017.03.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/23/2017] [Indexed: 12/27/2022]
Abstract
INTRODUCTION AND OBJECTIVES Although extracorporeal shock wave lithotripsy (ESWL) is the first choice for pediatric renal calculi <2 cm, the success rate after the first session is low. This is in contrast to other minimally invasive procedures like percutanous nephrolithotomy (PCNL) and retrograde intrarenal surgery (RIRS), which have higher rates of success. Therefore, the present study sought to identify predictors of success after one session of ESWL. PATIENTS AND METHODS A prospective study including 100 children with renal stone burden <2 cm who underwent ESWL at the present institution. The success rate after the first session was analyzed, and the predictors of success were investigated. The success of ESWL monotherapy was defined by absence of any residual fragments after 3 months, on non-contrast spiral computerized tomography (NCCT) scan, without need of any additional intervention. RESULTS Between January 2013 and October 2015, 100 children were treated with a Dornier Gemini lithotripter at the present institution. The mean patients age and stone size were 6 years (range: 1.8-14) and 13.1 mm (range: 6-20), respectively. After one session, 47% of patients showed complete clearance 3 months postoperative, those patients versus those who required an additional session or auxiliary procedures were younger in age, with smaller stone size and lower density. On multivariate analysis, only patient age was an independent predictor of success (odds ratio (OR) 0.9; P < 0.001). CONCLUSION Patient's age was an important predictor for response after ESWL monotherapy: not only did children respond better than adults, but age was also an independent predictor within the pediatric group.
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Affiliation(s)
- G Alsagheer
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - M S Abdel-Kader
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - A M Hasan
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - O Mahmoud
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt.
| | - O Mohamed
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - A Fathi
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - M Abass
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
| | - A Abolyosr
- Urology Department, Qena Faculty of Medicine, South Valley University, Qena, Egypt
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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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A new method for predicting uric acid composition in urinary stones using routine single-energy CT. Urolithiasis 2017; 46:325-332. [PMID: 28660283 PMCID: PMC6061464 DOI: 10.1007/s00240-017-0994-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/15/2017] [Indexed: 10/31/2022]
Abstract
Urinary stones composed of uric acid can be treated medically. Prediction of uric acid stone type is, therefore, desirable when a urinary stone is diagnosed with unenhanced CT. The purpose of the present study was to describe single-energy thin slice quantitative CT parameters of urinary stones correlated to chemical stone type and to develop a method to distinguish pure uric acid stones (UA) from other stones (non-UA/Mix). Unenhanced thin slice single-energy CT images of 126 urinary stones (117 patients) with known chemical stone type were retrospectively included in the study. Among the included stones, 22 were UA and 104 were non-UA/Mix. The included CT images and Laplacian filtered images of the stones were quantitatively analyzed using operator-independent methods. A post hoc classification method for pure UA stones was created using a combination of cutoff values for the peak attenuation and peak point Laplacian. The stone types differed in most quantitative image characteristics including mean attenuation (p < 0.001), peak attenuation (p < 0.001), and peak point Laplacian (p < 0.001). The sensitivity for the post hoc-developed peak attenuation-peak point Laplacian method for classifying pure UA stones was 95% [21/22, 95% CI (77-100%)] and the specificity was 99% [103/104, 95% CI (95-100%)]. In conclusion, quantitative image analysis of thin slice routine single-energy CT images is promising for predicting pure UA content in urinary stones, with results comparable to double energy methods.
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Ozgor F, Tosun M, Kayali Y, Savun M, Binbay M, Tepeler A. External Validation and Evaluation of Reliability and Validity of the Triple D Score to Predict Stone-Free Status After Extracorporeal Shockwave Lithotripsy. J Endourol 2017; 31:169-173. [PMID: 27889982 DOI: 10.1089/end.2016.0721] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE The Triple D scoring system is defined as novel and simple nomogram using the main parameters (skin-to-stone distance, stone density, and volume) to indicate most appropriate patients for extracorporeal shockwave lithotripsy (SWL). We aimed to evaluate the accuracy of the Triple D scoring system in predicting SWL success rates. PATIENTS AND METHODS In two tertiary academic centers, charts were retrospectively analyzed of patients who had, between January 2014 and May 2016, been treated by SWL for radiopaque kidney stones. A total of 200 patients were enrolled into the study. Parameters were calculated for each of the three specified variables. Since one point was assigned for any parameter that was less than the cutoff value, Triple D scores ranged from 0 (worst) to 3 (best). RESULTS Stone-free status was achieved in 115 patients (57.5%), and 85 patients had one or more residual fragments (42.5%). Differences in stone characteristics, including stone location, density, and volume, were statistically significant in patients whether SWL achieved stone-free status or not (p < 0.001, p < 0.001, and p < 0.001, respectively). Triple D scores were significantly higher in patients treated with SWL compared with patients in whom SWL failed (p < 0.001). Triple D scores of 0, 1, 2, and 3 correlated with stone-free rates of 41.7%, 33.7%, 69.4%, and 97%, respectively. The multivariate analyses revealed that Triple D score and stone location were identified as independent factors affecting SWL success (p < 0.001 and p = 0.008, respectively). The mean number of SWL sessions was significantly higher in patients with SWL failure (p = 0.003). CONCLUSION Our study externally validates that the Triple D scoring system is associated with SWL success in the treatment of renal and ureteral stones. Further studies are warranted to assess clinical usefulness and the accuracy of this nomogram in different patient groups.
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Affiliation(s)
- Faruk Ozgor
- 1 Department of Urology, Haseki Teaching and Research Hospital , Istanbul, Turkey
| | - Muhammed Tosun
- 2 Department of Urology, Faculty of Medicine, Bezmialem Vakif University , Istanbul, Turkey
| | - Yunus Kayali
- 2 Department of Urology, Faculty of Medicine, Bezmialem Vakif University , Istanbul, Turkey
| | - Metin Savun
- 1 Department of Urology, Haseki Teaching and Research Hospital , Istanbul, Turkey
| | - Murat Binbay
- 1 Department of Urology, Haseki Teaching and Research Hospital , Istanbul, Turkey
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Uncovering the real outcomes of active renal stone treatment by utilizing non-contrast computer tomography: a systematic review of the current literature. World J Urol 2016; 35:897-905. [DOI: 10.1007/s00345-016-1943-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/21/2016] [Indexed: 11/26/2022] Open
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Gökce MI, Esen B, Gülpınar B, Süer E, Gülpınar Ö. External Validation of Triple D Score in an Elderly (≥65 Years) Population for Prediction of Success Following Shockwave Lithotripsy. J Endourol 2016; 30:1009-16. [PMID: 27392789 DOI: 10.1089/end.2016.0328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Triple D score was recently developed for prediction of extracorporeal shockwave lithotripsy (SWL) outcomes. However, it has not been validated. SWL in elderly patients results in lower success and higher complication rates. We aimed at externally validating Triple D score in a population ≥65 years of age. PATIENTS AND METHODS We retrospectively analyzed the data of 182 patients ≥65 years of age who underwent SWL for renal or ureteral stones and were evaluated with non-contrast computed tomography before SWL. Stone volume (SV), skin-to-stone distance (SSD), and stone density were measured, and cutoff values were determined with receiver operator characteristic analysis. Triple D scores were calculated, and success rates were determined for each score. RESULTS Mean SV, SSD, and stone density values were significantly higher in patients with failed outcomes compared with those with successful outcomes in both renal and ureteral cases. Cutoff values of 187.5 mm(3), 10.5 cm, and 675 HU for renal stones and of 185 mm(3), 11.5 cm, and 785 HU for ureteral stones were detected. Success rates of 95.5% and 95% were detected for patients with a Triple D score of 3 in the renal and ureteral stone groups, respectively. Success rates of patients with a Triple D score of 0 were 20% and 25% in the renal and ureteral stone groups, respectively. CONCLUSIONS Triple D score correlated well with SWL outcomes in patients ≥65 years of age, and it is externally validated. Various factors may deal with cutoff levels of involved parameters. Therefore, we suggest that each institution determines its unique cutoff levels for SV, SSD, and stone density parameters and calculates the Triple D score for its patients with respect to these cutoff levels to predict the success after SWL and aid in decision making.
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Affiliation(s)
- Mehmet Ilker Gökce
- 1 Department of Urology, Ankara University School of Medicine , Ankara, Turkey
| | - Barış Esen
- 1 Department of Urology, Ankara University School of Medicine , Ankara, Turkey
| | - Başak Gülpınar
- 2 Department of Radiology, Ankara University School of Medicine , Ankara, Turkey
| | - Evren Süer
- 1 Department of Urology, Ankara University School of Medicine , Ankara, Turkey
| | - Ömer Gülpınar
- 1 Department of Urology, Ankara University School of Medicine , Ankara, Turkey
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Park HS, Gong MK, Yoon CY, Moon DG, Cheon J, Choi YD. Computed Tomography-Based Novel Prediction Model for the Outcome of Shockwave Lithotripsy in Proximal Ureteral Stones. J Endourol 2016; 30:810-6. [DOI: 10.1089/end.2016.0056] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Hong Seok Park
- Department of Urology, College of Medicine, Korea University, Seoul, Korea
| | - Mi Kyung Gong
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Cheol Yong Yoon
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
| | - Du Geon Moon
- Department of Urology, College of Medicine, Korea University, Seoul, Korea
| | - Jun Cheon
- Department of Urology, College of Medicine, Korea University, Seoul, Korea
| | - Young Deuk Choi
- Department of Urology, Urological Science Institute, Yonsei University College of Medicine, Seoul, Korea
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Abstract
Kidney stones are mineral deposits in the renal calyces and pelvis that are found free or attached to the renal papillae. They contain crystalline and organic components and are formed when the urine becomes supersaturated with respect to a mineral. Calcium oxalate is the main constituent of most stones, many of which form on a foundation of calcium phosphate called Randall's plaques, which are present on the renal papillary surface. Stone formation is highly prevalent, with rates of up to 14.8% and increasing, and a recurrence rate of up to 50% within the first 5 years of the initial stone episode. Obesity, diabetes, hypertension and metabolic syndrome are considered risk factors for stone formation, which, in turn, can lead to hypertension, chronic kidney disease and end-stage renal disease. Management of symptomatic kidney stones has evolved from open surgical lithotomy to minimally invasive endourological treatments leading to a reduction in patient morbidity, improved stone-free rates and better quality of life. Prevention of recurrence requires behavioural and nutritional interventions, as well as pharmacological treatments that are specific for the type of stone. There is a great need for recurrence prevention that requires a better understanding of the mechanisms involved in stone formation to facilitate the development of more-effective drugs.
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Yazici O, Tuncer M, Sahin C, Demirkol MK, Kafkasli A, Sarica K. Shock Wave Lithotripsy in Ureteral Stones: Evaluation of Patient and Stone Related Predictive Factors. Int Braz J Urol 2015; 41:676-82. [PMID: 26401859 PMCID: PMC4756995 DOI: 10.1590/s1677-5538.ibju.2014.0330] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 10/19/2014] [Indexed: 11/30/2022] Open
Abstract
Purpose: To evaluate the patient and stone related factors which may influence the final outcome of SWL in the management of ureteral stones. Materials and Methods: Between October 2011 and October 2013, a total of 204 adult patients undergoing SWL for single ureteral stone sizing 5 to 15 mm were included into the study program. The impact of both patient (age, sex, BMI,) and stone related factors (laterality, location, longest diameter and density as CT HU) along with BUN and lastly SSD (skin to stone distance) on fragmentation were analysed by univariate and multivariate analyses. Results: Stone free rates for proximal and distal ureteral stones were 68.8% and 72.7%, respectively with no statistically significant difference between two groups (p=0.7). According to univariate and multivariate analyses, while higher BMI (mean: 26.8 and 28.1, p=0.048) and stone density values (mean: 702 HU and 930 HU, p<0.0001) were detected as statistically significant independent predictors of treatment failure for proximal ureteral stones, the only statistically significant predicting parameter for the success rates of SWL in distal ureteral stones was the higher SSD value (median: 114 and 90, p=0.012). Conclusions: Our findings have clearly shown that while higher BMI and increased stone attenuation values detected by NCCT were significant factors influencing the final outcome of SWL treatment in proximal ureteral stones; opposite to the literature, high SSD was the only independent predictor of success for the SWL treatment of distal ureteral stones.
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Affiliation(s)
- Ozgur Yazici
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
| | - Murat Tuncer
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
| | - Cahit Sahin
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
| | - Mehmet K Demirkol
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
| | - Alper Kafkasli
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
| | - Kemal Sarica
- Dr. Lutfi Kirdar Kartal Training and Research Hospital, Istanbul, Turkey
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Largo R, Stolzmann P, Fankhauser CD, Poyet C, Wolfsgruber P, Sulser T, Alkadhi H, Winklhofer S. Predictive value of low tube voltage and dual-energy CT for successful shock wave lithotripsy: an in vitro study. Urolithiasis 2015; 44:271-6. [PMID: 26391614 DOI: 10.1007/s00240-015-0824-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/08/2015] [Indexed: 12/28/2022]
Abstract
This study investigates the capabilities of low tube voltage computed tomography (CT) and dual-energy CT (DECT) for predicting successful shock wave lithotripsy (SWL) of urinary stones in vitro. A total of 33 urinary calculi (six different chemical compositions; mean size 6 ± 3 mm) were scanned using a dual-source CT machine with single- (120 kVp) and dual-energy settings (80/150, 100/150 Sn kVp) resulting in six different datasets. The attenuation (Hounsfield Units) of calculi was measured on single-energy CT images and the dual-energy indices (DEIs) were calculated from DECT acquisitions. Calculi underwent SWL and the number of shock waves for successful disintegration was recorded. The prediction of required shock waves regarding stone attenuation/DEI was calculated using regression analysis (adjusted for stone size and composition) and the correlation between CT attenuation/DEI and the number of shock waves was assessed for all datasets. The median number of shock waves for successful stone disintegration was 72 (interquartile range 30-361). CT attenuation/DEI of stones was a significant, independent predictor (P < 0.01) for the number of required shock waves with the best prediction at 80 kVp (β estimate 0.576) (P < 0.05). Correlation coefficients between attenuation/DEI and the number of required shock waves ranged between ρ = 0.31 and 0.68 showing the best correlation at 80 kVp (P < 0.001). The attenuation of urinary stones at low tube voltage CT is the best predictor for successful stone disintegration, being independent of stone composition and size. DECT shows no added value for predicting the success of SWL.
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Affiliation(s)
- Remo Largo
- Department of Urology, University Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Paul Stolzmann
- Institute of Diagnostic and Interventional Radiology, University Hospital Zürich, Raemistrasse 100, 8091, Zürich, Switzerland
| | - Christian D Fankhauser
- Department of Urology, University Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Cédric Poyet
- Department of Urology, University Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Pirmin Wolfsgruber
- Department of Urology, University Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Tullio Sulser
- Department of Urology, University Hospital Zürich, University of Zürich, Zürich, Switzerland
| | - Hatem Alkadhi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zürich, Raemistrasse 100, 8091, Zürich, Switzerland
| | - Sebastian Winklhofer
- Institute of Diagnostic and Interventional Radiology, University Hospital Zürich, Raemistrasse 100, 8091, Zürich, Switzerland.
- Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Ave, M-372, Box 0628, San Francisco, CA, 94143-0628, USA.
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Müllhaupt G, Engeler DS, Schmid HP, Abt D. How do stone attenuation and skin-to-stone distance in computed tomography influence the performance of shock wave lithotripsy in ureteral stone disease? BMC Urol 2015. [PMID: 26201514 PMCID: PMC4511972 DOI: 10.1186/s12894-015-0069-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background Shock wave lithotripsy (SWL) is a noninvasive, safe, and efficient treatment option for ureteral stones. Depending on stone location and size, the overall stone-free rate (SFR) varies significantly. Failure of stone disintegration results in unnecessary exposure to shock waves and radiation and requires alternative treatment procedures, which increases medical costs. It is therefore important to identify predictors of treatment success or failure in patients who are potential candidates for SWL before treatment. Nowadays, noncontrast computed tomography (NCCT) provides reliable information on stone location, size, number, and total stone burden. The impact of additional information provided by NCCT, such as skin-to-stone distance (SSD) and mean attenuation value (MAV), on stone fragmentation in ureteral stone disease has hardly been investigated separately so far. Thus, the objective of this study was to assess the influence of stone attenuation, SSD and body mass index (BMI) on the outcome of SWL in ureteral stones. Methods We reviewed the medical records of 104 patients (80 men, 24 women) with ureteral stone disease treated consecutively at our institution with SWL between 2010 and 2013. MAV in Hounsfield Units (HU) and SSD were determined by analyzing noncontrast computed tomography images. Outcome of SWL was defined as successful (visible stone fragmentation on kidney, ureter, and bladder film (KUB)) or failed (absent fragmentation on KUB). Results Overall success of SWL was 50 % (52 patients). Median stone attenuation was 956.9 HU (range 495–1210.8) in the group with successful disintegration and 944.6 (range 237–1302) in the patients who had absent or insufficient fragmentation. Median SSD was 125 mm (range 81–165 mm) in the group treated successfully and 141 mm (range 108–172 mm) in the patients with treatment failure. Unlike MAV (p = 0.37), SSD (p < 0.001) and BMI (p = 0.008) significantly correlated with treatment outcome. Conclusion The choice of treatment for ureteral stones should be based on stone location and size as considered in the AUA and EAU guidelines on urinary stone disease. In ambiguous cases, SSD and BMI can be used to assist in the decision. In this study, MAV showed no correlation with fragmentation rate of SWL.
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Affiliation(s)
- Gautier Müllhaupt
- Department of Urology, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
| | - Daniel S Engeler
- Department of Urology, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
| | - Hans-Peter Schmid
- Department of Urology, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
| | - Dominik Abt
- Department of Urology, Cantonal Hospital St. Gallen, Rorschacherstrasse 95, 9007, St. Gallen, Switzerland.
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40
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Andrabi Y, Patino M, Das CJ, Eisner B, Sahani DV, Kambadakone A. Advances in CT imaging for urolithiasis. Indian J Urol 2015; 31:185-93. [PMID: 26166961 PMCID: PMC4495492 DOI: 10.4103/0970-1591.156924] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Urolithiasis is a common disease with increasing prevalence worldwide and a lifetime-estimated recurrence risk of over 50%. Imaging plays a critical role in the initial diagnosis, follow-up and urological management of urinary tract stone disease. Unenhanced helical computed tomography (CT) is highly sensitive (>95%) and specific (>96%) in the diagnosis of urolithiasis and is the imaging investigation of choice for the initial assessment of patients with suspected urolithiasis. The emergence of multi-detector CT (MDCT) and technological innovations in CT such as dual-energy CT (DECT) has widened the scope of MDCT in the stone disease management from initial diagnosis to encompass treatment planning and monitoring of treatment success. DECT has been shown to enhance pre-treatment characterization of stone composition in comparison with conventional MDCT and is being increasingly used. Although CT-related radiation dose exposure remains a valid concern, the use of low-dose MDCT protocols and integration of newer iterative reconstruction algorithms into routine CT practice has resulted in a substantial decrease in ionizing radiation exposure. In this review article, our intent is to discuss the role of MDCT in the diagnosis and post-treatment evaluation of urolithiasis and review the impact of emerging CT technologies such as dual energy in clinical practice.
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Affiliation(s)
- Yasir Andrabi
- Department of Radiology, Division of Abdominal Imaging and Intervention Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - Manuel Patino
- Department of Radiology, Division of Abdominal Imaging and Intervention Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - Chandan J Das
- Department of Radiology, All India Institute of Medical Sciences, New Delhi, India
| | - Brian Eisner
- Department of Urology, Massachusetts General Hospital, Boston, MA, USA
| | - Dushyant V Sahani
- Department of Radiology, Division of Abdominal Imaging and Intervention Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - Avinash Kambadakone
- Department of Radiology, Division of Abdominal Imaging and Intervention Radiology, Massachusetts General Hospital, Boston, MA, USA
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Gok A, Polat H, Cift A, Yucel MO, Gok B, Sirik M, Benlioglu C, Kalyenci B. The hounsfield unit value calculated with the aid of non-contrast computed tomography and its effect on the outcome of percutaneous nephrolithotomy. Urolithiasis 2015; 43:277-81. [PMID: 25820292 DOI: 10.1007/s00240-015-0766-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Accepted: 03/18/2015] [Indexed: 11/25/2022]
Abstract
To evaluate the effect of the Hounsfield unit (HU) value, calculated with the aid of non-contrast computed tomography, on the outcome of percutaneous nephrolithotomy (PCNL). Data for 83 patients evaluated in our clinic between November 2011 and February 2014 that had similar stone sizes, localizations, and radio opacities were retrospectively reviewed. The patients were grouped according to their HU value, in a low HU group (HU ≤ 1000) or a high HU group (HU > 1000). The two groups were compared based on their PCNL success rates, complications, duration of surgery, duration of fluoroscopy, and decrease in the hematocrit. There were no significant differences in terms of mean age, female-male ratio, or mean body mass index between the two groups (p > 0.05). The stone size and stone surface area did not differ significantly between the groups (p = 0.820 and p = 0.394, respectively). The unsuccessful PCNL rate and the prevalence of complications did not differ significantly between the two groups (p > 0.05). The duration of surgery, duration of fluoroscopy, and decrease in the hematocrit were significantly greater in the high HU group compared to the low HU group (p < 0.001). Calculating the HU value using this imaging method may predict cases with longer surgery durations, longer fluoroscopy durations, and greater decreases in hematocrite levels, but this value is not related to the success rate of PCNL.
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Affiliation(s)
- Alper Gok
- Department of Urology, Faculty of Medicine, Adıyaman University, Adıyaman, Turkey,
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Tran TY, McGillen K, Cone EB, Pareek G. Triple D Score Is a Reportable Predictor of Shockwave Lithotripsy Stone-Free Rates. J Endourol 2015; 29:226-30. [DOI: 10.1089/end.2014.0212] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Timothy Y. Tran
- Division of Urology, Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - Kathryn McGillen
- Department of Radiology, Penn State Hershey Medical Center, Hershey, Pennsylvania
| | | | - Gyan Pareek
- Division of Urology, Warren Alpert Medical School of Brown University, Providence, Rhode Island
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Evaluation of computed tomography findings for success prediction after extracorporeal shock wave lithotripsy for urinary tract stone disease. Int Urol Nephrol 2014; 47:69-73. [DOI: 10.1007/s11255-014-0857-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 10/03/2014] [Indexed: 10/24/2022]
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Abdelaziz H, Elabiad Y, Aderrouj I, Janane A, Ghadouane M, Ameur A, Abbar M. The usefulness of stone density and patient stoutness in predicting extracorporeal shock wave efficiency: Results in a North African ethnic group. Can Urol Assoc J 2014; 8:E567-9. [PMID: 25210567 DOI: 10.5489/cuaj.1849] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION We determine the role of stone density and skin-to-stone distance (SSD) by non-contrast computed tomography of the kidneys, ureters and bladder (CT-KUB) in predicting the success of extracorporeal shock wave lithotripsy (ESWL). METHODS We evaluated 89 patients who received ESWL for renal and upper ureteric calculi measuring 5 to 20 mm, over a 12-month period. The mean stone density in Hounsfield units (HU) and mean SSD in mm was determined on pre-treatment CT-KUB at the CT workstation. ESWL was successful if post-treatment residual stone fragments were ≤3 mm. RESULTS ESWL success was observed in 68.5% of patients. Mean stone densities were 505 ± 153 and 803 ± 93 HU in the ESWL successful and failure groups, respectively (p < 0.001, student's t-test). The mean SSD were 10.6 ± 2.0 and 11.2 ± 2.6 cm in ESWL successful and failure groups, respectively; this was not statistically significant. CONCLUSIONS This study shows that stone density can help to predict the outcome of ESWL. We propose that stone density <500 HU are highly likely to result in successful ESWL. Conversely, stone densities >800 HU are less likely to be successful.
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Affiliation(s)
- Hamdoune Abdelaziz
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Yassine Elabiad
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Ilyas Aderrouj
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Abdellatif Janane
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Mohamed Ghadouane
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Ahmed Ameur
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
| | - Mohamed Abbar
- Urology Department, University Military Hospital Med V., Hay Ryad, Rabat, Morocco
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Evaluation of Hounsfield Units as a predictive factor for the outcome of extracorporeal shock wave lithotripsy and stone composition. Urolithiasis 2014; 43:69-75. [DOI: 10.1007/s00240-014-0712-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Accepted: 08/05/2014] [Indexed: 10/24/2022]
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46
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Massoud AM, Abdelbary AM, Al-Dessoukey AA, Moussa AS, Zayed AS, Mahmmoud O. The success of extracorporeal shock-wave lithotripsy based on the stone-attenuation value from non-contrast computed tomography. Arab J Urol 2014; 12:155-61. [PMID: 26019941 PMCID: PMC4434685 DOI: 10.1016/j.aju.2014.01.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/30/2013] [Accepted: 01/01/2014] [Indexed: 11/24/2022] Open
Abstract
Objective To determine the utility of the urinary stone-attenuation value (SAV, in Hounsfield units, HU) from non-contrast computed tomography (NCCT) for predicting the success of extracorporeal shock-wave lithotripsy (ESWL). Patients and methods The study included 305 patients with renal calculi of ⩽30 mm and upper ureteric calculi of ⩽20 mm. The SAV was measured using NCCT. Numerical variables were compared using a one-way analysis of variance with posthoc multiple two-group comparisons. Univariate and multivariate regression analysis models were used to test the preferential effect of the independent variable(s) on the success of ESWL. Results Patients were grouped according to the SAV as group 1 (⩽500 HU, 81 patients), group 2 (501–1000 HU, 141 patients) and group 3 (>1000 HU, 83 patients). ESWL was successful in 253 patients (83%). The rate of stone clearance was 100% in group 1, 95.7% (135/141) in group 2 and 44.6% (37/83) in group 3 (P = 0.001). Conclusions The SAV value is an independent predictor of the success of ESWL and a useful tool for planning stone treatment. Patients with a SAV ⩾956 HU are not ideal candidates for ESWL. The inclusion criteria for ESWL of stones with a SAV <500 HU can be expanded with regard to stone size, site, age, renal function and coagulation profile. In patients with a SAV of 500–1000 HU, factors like a body mass index of >30 kg/m2 and a lower calyceal location make them less ideal for ESWL.
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Affiliation(s)
- Amr M Massoud
- Department of Urology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | - Ahmed M Abdelbary
- Department of Urology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | - Ahmad A Al-Dessoukey
- Department of Urology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | - Ayman S Moussa
- Department of Urology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | | | - Osama Mahmmoud
- Department of Urology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
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Comparison of shock wave lithotripsy, flexible ureterorenoscopy and percutaneous nephrolithotripsy on moderate size renal pelvis stones. Urolithiasis 2013; 42:115-20. [PMID: 24162954 DOI: 10.1007/s00240-013-0615-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 10/15/2013] [Indexed: 12/17/2022]
Abstract
To compare success and complication rates of shock wave lithotripsy (SWL), flexible ureterorenoscopy (F-URS) and percutaneous nephrolithotripsy (PNL) according to modified clavien grading system of renal pelvis stones between 1 and 2 cm. The results of 149 patients were evaluated retrospectively. Patients were divided into three groups as 52 for SWL, 47 for F-URS and 50 for PNL. Complications were evaluated by modified Clavien grading system. In the first group, stone-free rates after a mean of 2, 6 sessions was 86 % (45/52). In Group 2, this ratio was 91.4 % (43/47), and in Group 3, it was 98 % (49/50). The success rate in Group 3 was significantly higher than other groups. Complication rates for Group 1, 2 and 3 were 7.6 % (4/52), 6.3 % (3/47) and 12 % (6/50), respectively. Although PNL was the most successful technique compared with other techniques, complications were also higher in this group. Even though PNL is the most successful, it should be performed for selected patient groups and indications should be carefully evaluated.
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El-Assmy A, El-Nahas AR, Abou-El-Ghar ME, Awad BA, Sheir KZ. Kidney stone size and hounsfield units predict successful shockwave lithotripsy in children. Urology 2013; 81:880-4. [PMID: 23395121 DOI: 10.1016/j.urology.2012.12.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 11/18/2012] [Accepted: 12/09/2012] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To define the preoperative kidney and stones characteristics on noncontrast-enhanced computed tomography that affect the success of extracorporeal shockwave lithotripsy (SWL) for treatment of renal calculi in pediatric patients. MATERIALS AND METHODS From 2005 to 2011, 57 children (age <16 years) with documented preoperative noncontrast-enhanced computed tomography scans underwent SWL for treatment of renal stones and were included in the present study. Stone size, site, multiplicity, average skin-to-stone distance, stone attenuation value, and kidney morphology were determined from the preoperative noncontrast-enhanced computed tomography scans. Success was defined as radiographically stone-free status at the 3-month follow-up examination after a single lithotripsy session without the need for additional sessions or ancillary procedures. RESULTS After a single session of SWL, 24 children (42.1%) were stone free on the 3-month follow-up imaging study without the need for additional SWL sessions. Treatment failed in 33 patients (57.9), with residual fragments in 30 children, of whom 29 required repeat SWL, and 3 with stones that were considered unchanged and were finally treated with percutaneous nephrolithotomy. Logistic regression analysis revealed that stone attenuation in Hounsfield units (HU) and stone length were the only significant predictors of success. When the HU were stratified into 2 groups of ≤600 and >600 HU, the SWL success rate was 82.1% and 20%, respectively (P = .023). When length was stratified as ≤12 mm and >12 mm, the stone-free rate was 58.6% and 25.1%, respectively (P = .016). CONCLUSION Stone attenuation ≤600 HU and stone length ≤12 mm were significant independent predictors of SWL success in children.
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Affiliation(s)
- Ahmed El-Assmy
- Department of Urology, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt.
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Comparison of retrograde intrarenal surgery, shockwave lithotripsy, and percutaneous nephrolithotomy for treatment of medium-sized radiolucent renal stones. World J Urol 2012. [DOI: 10.1007/s00345-012-0991-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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50
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Bhojani N, Lingeman JE. Shockwave lithotripsy-new concepts and optimizing treatment parameters. Urol Clin North Am 2012. [PMID: 23177635 DOI: 10.1016/j.ucl.2012.09.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The treatment of kidney stone disease has changed dramatically over the past 30 years. This change is due in large part to the arrival of extracorporeal shock wave lithotripsy (ESWL). ESWL along with the advances in ureteroscopic and percutaneous techniques has led to the virtual extinction of open surgical treatments for kidney stone disease. Much research has gone into understanding how ESWL can be made more efficient and safe. This article discusses the parameters that can be used to optimize ESWL outcomes as well as the new concepts that are affecting the efficacy and efficiency of ESWL.
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Affiliation(s)
- Naeem Bhojani
- Department of Urology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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