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Deng S, Guo D, Liu L, Wang Y, Fei K, Zhang H. Preference for diagnosing and treating renal colic during pregnancy: a survey among Chinese urologists. Sci Rep 2024; 14:2914. [PMID: 38316888 PMCID: PMC10844619 DOI: 10.1038/s41598-024-53608-w] [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: 09/27/2023] [Accepted: 02/02/2024] [Indexed: 02/07/2024] Open
Abstract
To explore the preference for diagnosing and treating renal colic during pregnancy among Chinese urologists. A questionnaire was designed using the Sojump® platform. WeChat, the largest social networking platform in China, was used to distribute the questionnaire to urologists at hospitals of all levels in China. In total, 110 responses were included. Of the respondents, 100.0% used ultrasound to diagnose renal colic during pregnancy, followed by magnetic resonance imaging (17.3%) and low-dose CT (3.6%). Phloroglucinol (80.9%) and progesterone (72.7%) were the most commonly used antispasmodics and analgesics. Opioid analgesics were not commonly used (12.7%). Most of the respondents (63.6%) indicated that no more than 20% of the patients needed surgical intervention. If surgery was unavoidable, 95.5% preferred temporary renal drainage, including ureteral stenting (92.7%) and percutaneous nephrostomy (2.7%). However, some respondents still preferred definitive stone treatment, such as ureteroscopy lithotripsy (3.6%) and percutaneous nephrolithotomy (0.9%). Moreover, there were no differences in the choices of urologists with different professional titles regarding diagnostic tools, most therapeutic medications, or surgical methods (p > 0.05). Ultrasound is the preferred tool for diagnosing renal colic during pregnancy. Low-dose CT is still not widely accepted. Pregnant patients with renal colic are initially treated conservatively. Urologists prefer ureteral stenting when there are clinical indications for intervention.
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Affiliation(s)
- Shidong Deng
- Department of Urology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Dayong Guo
- Department of Urology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Lingzhi Liu
- Department of Urology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Yurou Wang
- Department of Urology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Kuilin Fei
- Department of Obstetrics, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, Guangdong, China.
| | - Huihui Zhang
- Department of Urology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China.
- Institute of Hospital Administration, University of South China, Hengyang, China.
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Lyon M, Sun A, Shah A, Llarena N, Dempster C, Sivalingam S, Calle J, Gadani S, Zampini A, De S. Comparison of Radiation Exposure for Pregnant Patients Requiring Intervention for Suspected Obstructing Nephrolithiasis. Urology 2023; 182:61-66. [PMID: 37783398 DOI: 10.1016/j.urology.2023.09.023] [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: 04/12/2023] [Revised: 08/08/2023] [Accepted: 09/23/2023] [Indexed: 10/04/2023]
Abstract
OBJECTIVE To identify the differences in radiation exposure per suspected stone episode between percutaneous nephrostomy tube (PCN), stent, and primary ureteroscopy (URS).The incidence of nephrolithiasis in pregnancy is low; however, repercussions for both mother and fetus can be significant. In cases of suspected obstructing nephrolithiasis, intervention may be required, including ureteral stent, PCN, or URS, with the potential for multiple subsequent procedures that often utilize fluoroscopy. METHODS Pregnant patients who required an intervention (stent, PCN, or URS) for suspected obstructing nephrolithiasis were retrospectively reviewed. The primary outcome was total fluoroscopy exposure per suspected stone episode. Secondary outcomes included fluoroscopic exposure per procedure and number of procedures required. RESULTS After excluding patients with renal anomalies and incomplete radiation data, 78 out of 100 patients were included in the analysis. Forty patients (51.3%) underwent initial stent placement, 22 (28.2%) underwent initial PCN placement, and 16 (20.5%) underwent primary URS. Total mean radiation exposure per stone episode was significantly higher in patients who underwent PCN, (286.9 mGy vs 3.7 mGy (stent) and 0.2 mGy (URS), P <.001). In addition, patients who underwent initial PCN placement had significantly more procedures (P <.001) and mean radiation exposure per procedure was higher (P <.001). More than 40% of PCNs experienced dysfunction, and mean duration between PCN exchanges was 16.5 days. CONCLUSION In pregnant patients with suspected obstructing nephrolithiasis requiring intervention, initial PCN placement was associated with a significantly higher number of procedures, radiation exposure per procedure, and total radiation exposure per suspected stone episode compared to stent and URS.
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Affiliation(s)
- Madison Lyon
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH.
| | - Alec Sun
- Case Western Reserve University, Cleveland, OH
| | - Anup Shah
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH
| | - Natalia Llarena
- Cleveland Clinic Foundation, Department of Obstetrics and Gynecology and Women's Health, Cleveland, OH
| | - Carrie Dempster
- Cleveland Clinic Foundation, Department of Obstetrics and Gynecology and Women's Health, Cleveland, OH
| | - Sri Sivalingam
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH
| | - Juan Calle
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH
| | - Sameer Gadani
- Cleveland Clinic Foundation, Department of Vascular and Interventional Radiology, Cleveland, OH
| | - Anna Zampini
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH
| | - Smita De
- Cleveland Clinic Foundation, Glickman Urologic Institute, Cleveland, OH
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Masselli G, Bonito G, Gigli S, Ricci P. Imaging of Acute Abdominopelvic Pain in Pregnancy and Puerperium-Part II: Non-Obstetric Complications. Diagnostics (Basel) 2023; 13:2909. [PMID: 37761275 PMCID: PMC10528125 DOI: 10.3390/diagnostics13182909] [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: 07/31/2023] [Revised: 08/28/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Emergency imaging in pregnancy and puerperium poses unique challenges both for clinicians and radiologists, requiring timely and accurate diagnosis. Delay in treatment may result in poor outcomes for both the patient and the foetus. Pregnant and puerperal patients may present in the emergency setting with acute abdominopelvic pain for various complications that can be broadly classified into obstetric and non-obstetric related diseases. Ultrasonography (US) is the primary diagnostic imaging test; however, it may be limited due to the patient's body habitus and the overlapping of bowel loops. Computed tomography (CT) carries exposure to ionising radiation to the foetus, but may be necessary in selected cases. Magnetic resonance imaging (MRI) is a valuable complement to US in the determination of the etiology of acute abdominal pain and can be used in most settings, allowing for the identification of a broad spectrum of pathologies with a limited protocol of sequences. In this second section, we review the common non-obstetric causes for acute abdominopelvic pain in pregnancy and post partum, offering a practical approach for diagnosis and pointing out the role of imaging methods (US, MRI, CT) with the respective imaging findings.
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Affiliation(s)
- Gabriele Masselli
- Department of Emergency Radiology-Policlinico Umberto I Hospital, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy; (G.M.); (P.R.)
| | - Giacomo Bonito
- Department of Emergency Radiology-Policlinico Umberto I Hospital, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy; (G.M.); (P.R.)
| | - Silvia Gigli
- Department of Diagnostic Imaging, Sandro Pertini Hospital, Via dei Monti Tiburtini 385, 00157 Rome, Italy;
| | - Paolo Ricci
- Department of Emergency Radiology-Policlinico Umberto I Hospital, Sapienza University of Rome, Viale del Policlinico 155, 00161 Rome, Italy; (G.M.); (P.R.)
- Department of Radiological, Oncological and Pathological Sciences, Policlinico Umberto I, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
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Dean NS, Krambeck AE. Contemporary Use of Computed Tomography (CT) Imaging in Suspected Urolithiasis in Pregnancy. Curr Urol Rep 2023; 24:443-449. [PMID: 37314612 DOI: 10.1007/s11934-023-01171-8] [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] [Accepted: 06/08/2023] [Indexed: 06/15/2023]
Abstract
PURPOSE OF REVIEW We aimed to examine the role of low-dose CT (LDCT) in the diagnostic work-up for suspected urolithiasis in pregnancy. We reviewed contemporary urologic recommendations for CT in pregnancy, its utilization for suspected urolithiasis, and explored barriers to its use. RECENT FINDINGS National urologic guidelines and the American College of Obstetricians and Gynecologists recommend the judicious use of LDCT imaging in pregnancy when necessary. We noted inconsistencies in review article management pathways and recommendations for CT imaging for suspected urolithiasis in pregnancy. Overall CT utilization in pregnancy for suspected urolithiasis is low. Proposed barriers to LDCT use in pregnancy include fears of litigation and misperceptions of the harm of diagnostic radiation. Recent advancements in imaging technologies for urolithiasis in pregnancy are limited. More specific diagnostic pathway recommendations from national urologic guideline bodies for when to use LDCT to investigate renal colic in pregnancy may reduce diagnostic and intervention delays.
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Affiliation(s)
- Nicholas S Dean
- Department of Urology, Northwestern University, 676 N. St. Clair, Suite 2300, Chicago, IL, 60611, United States.
| | - Amy E Krambeck
- Department of Urology, Northwestern University, 676 N. St. Clair, Suite 2300, Chicago, IL, 60611, United States
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Wou F, Sinnott ME, Narayanan M. Erector spinae plane block for acute renal colic in a pregnant patient. Int J Obstet Anesth 2023; 55:103636. [PMID: 37085389 DOI: 10.1016/j.ijoa.2023.103636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 01/08/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023]
Affiliation(s)
- F Wou
- Anaesthetics Department, Frimley Park Hospital, Camberley, UK.
| | - M E Sinnott
- Anaesthetics Department, Frimley Park Hospital, Camberley, UK
| | - M Narayanan
- Anaesthetics Department, Frimley Park Hospital, Camberley, UK
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Tang W, Xie Z, Liu M, Zhao Z, Wu T. Analysis of uroseptic shock after ureteroscopy for ureteral calculi during pregnancy: a case report. BMC Urol 2023; 23:128. [PMID: 37501116 PMCID: PMC10375750 DOI: 10.1186/s12894-023-01299-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 07/21/2023] [Indexed: 07/29/2023] Open
Abstract
BACKGROUND Uroseptic shock secondary to ureteral calculi during pregnancy is rare. It is characterized by rapid onset, rapid progression, aggressive disease, limited treatment, poor prognosis, and a mortality rate higher than 20% with improper or delayed management. A clear diagnosis is made based on typical clinical symptoms and abdominal ultrasound, often requiring combined multidisciplinary treatment and the simultaneous release of the obstruction. The high mortality rate is mainly related to inappropriate early treatment of stones and infections or failure to intervene in a timely manner. CASE PRESENTATION A 21-year-old first-time pregnant patient with uroseptic shock was admitted to our intensive care unit. The patient was successfully treated at our hospital with multidisciplinary cooperation, high-dose vasoactive drugs, IABP, CRRT, VA-ECMO, and termination of pregnancy. CONCLUSIONS Timely relief of obstructions, termination of pregnancy, and the provision of IABP, CRRT, and VA-ECMO when necessary in critically ill patients with uroseptic shock during pregnancy can improve the success rate of resuscitation.
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Affiliation(s)
- Wen Tang
- Department of Urology, The Affiliated Hospital of Zunyi Medical University, No. 149 Road Dalian, Huichuan District, Zunyi, China
| | - Zhifei Xie
- Department of Urology, The Affiliated Hospital of Zunyi Medical University, No. 149 Road Dalian, Huichuan District, Zunyi, China
| | - Mingwen Liu
- Department of Urology, The Affiliated Hospital of Zunyi Medical University, No. 149 Road Dalian, Huichuan District, Zunyi, China
| | - ZeJu Zhao
- Department of Urology, The Affiliated Hospital of Zunyi Medical University, No. 149 Road Dalian, Huichuan District, Zunyi, China.
| | - Tao Wu
- Department of Urology, The Affiliated Hospital of Zunyi Medical University, No. 149 Road Dalian, Huichuan District, Zunyi, China.
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Mason MM, Nackeeran S, Lokeshwar S, Carino Mason MR, Kohn T, Shah HN, Ramasamy R. A comparison of adverse pregnancy events between ureteral stents and percutaneous nephrostomy tubes in the treatment of nephrolithiasis during pregnancy: A propensity score-matched analysis of a large multi-institutional research network. World J Urol 2023; 41:1721-1726. [PMID: 35909212 DOI: 10.1007/s00345-022-04111-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/18/2022] [Indexed: 12/01/2022] Open
Abstract
PURPOSE To investigate rates of adverse pregnancy events associated with the use of percutaneous nephrostomy tubes (PCN) versus ureteral stents in the treatment of nephrolithiasis during pregnancy. METHODS We queried the TriNetX Diamond Network database to evaluate pregnant women (ICD-10 Z34, O09) with a history of nephrolithiasis (N20-23) who underwent a PCN (CPT 50432) or ureteral stent (52332) placement up to 6 months before delivery (O80-82). We controlled for the following potentially confounding variables through propensity score matching: age, race, ethnicity, acute pyelonephritis (N10), infections of the genitourinary tract in pregnancy (O23.0), and other sepsis (A41) at the time of stent or PCN placement. RESULTS We identified 2,999 pregnant women who underwent ureteral stent placement and 321 who underwent PCN. Following propensity score matching, we found there to be no significant difference in the rate of premature labor or delivery (aOR 1.08, 95% CI 0.735-1.588), premature rupture of membranes (0.889, 0.453-1.743), intrauterine infection (0.906, 0.379-2.165), or c-Sect. (0.825, 0.408-1.667). Within 6 months of their initial procedure, women with a ureteral stent experienced a significantly decreased rate of subsequent urinary tract infection (UTI) or pyelonephritis (0.52, 0.38-0.71), inpatient hospital stay (0.40, 0.26-0.64), emergency department visit (0.65, 0.48-0.89), and repeat exchange procedure (0.70, 0.51-0.96). CONCLUSION In the treatment of nephrolithiasis during pregnancy, PCN versus ureteral stent placement does not confer a significant difference in rates of adverse pregnancy events. However, ureteral stent placement was associated with a lower incidence of hospital admissions, emergency department visits, exchange procedures, and new UTIs or pyelonephritis.
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Affiliation(s)
- Matthew M Mason
- University of Miami Miller School of Medicine, Miami, FL, USA
| | - Sirpi Nackeeran
- University of Miami Miller School of Medicine, Miami, FL, USA
| | - Soum Lokeshwar
- Department of Urology, Yale University School of Medicine, New Haven, CT, USA
| | | | - Taylor Kohn
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Hemendra N Shah
- Department of Urology, Desai Sethi Urology Institute, University of Miami Miller School of Medicine, 1120 NW 14th Street, Room 1560, Miami, FL, 33136, USA
| | - Ranjith Ramasamy
- Department of Urology, Desai Sethi Urology Institute, University of Miami Miller School of Medicine, 1120 NW 14th Street, Room 1560, Miami, FL, 33136, USA.
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Juliebø-Jones P, Beisland C, Gjengstø P, Baug S, Ulvik Ø. Ureteroscopy during pregnancy: Outcomes and lessons learned over 4 decades at a tertiary center in Norway. Curr Urol 2023; 17:7-12. [PMID: 37692136 PMCID: PMC10487287 DOI: 10.1097/cu9.0000000000000157] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 08/22/2022] [Indexed: 11/07/2022] Open
Abstract
Background The management of suspected kidney stone disease in pregnancy is challenging. In cases of persistent flank pain and where investigations may have rendered equivocal results, ureteroscopy (URS) is a recognized diagnostic and therapeutic intervention. This study aimed to investigate the safety and outcomes associated with performing URS during pregnancy, as the technique has evolved over the past 4 decades at our center. Materials and Methods We performed a retrospective analysis of pregnant patients who underwent URS at our tertiary center between 1984 and 2022. Outcomes of interest included anesthetic approach, operative time, hospital stay, and complications. Results Eighty-seven pregnant patients underwent 96 URS procedures, and 60% (n = 57) of these procedures were performed during the third trimester. Overall, 58% (n = 56) of the procedures were achieved with local anesthesia and light sedation. During the most recent decade, the latter was successfully carried out in 97% of the procedures, with the remainder occurring under spinal anesthesia as per patient choice. Overall, 57% (n = 50) of the whole study group had ureteral calculi found at the time of surgery and in 88% (n = 44) of these cases, fragmentation/extraction was performed. The remainder had insertion of ureteral stent with definitive clearance deferred until postpartum. Mean operative time and postprocedure hospital stay was 33 minutes (range, 7-100 minutes) and 2.2 days (range, 0-16 days), respectively. The overall intraoperative and postoperative complication rates were 2% and 11%, respectively. During the final decade, the latter improved to 6% and all adverse events were minor (Clavien I/II), with the exception of a single case. Regarding exit strategy, ureteral stent was placed in 42% (n = 40) of the procedures, 23% (n = 22) had ureteral catheter inserted, and the remainder (35%, n = 34) had none. Conclusions Ureteroscopy can be safely performed during pregnancy using anesthetic approach with local anesthesia and light sedation. Development of a local protocol and multidisciplinary management algorithm are instrumental in enabling the delivery of such a service.
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Affiliation(s)
- Patrick Juliebø-Jones
- Department of Urology, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Christian Beisland
- Department of Urology, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Peder Gjengstø
- Department of Urology, Haukeland University Hospital, Bergen, Norway
| | - Stephen Baug
- Department of Urology, Haukeland University Hospital, Bergen, Norway
| | - Øyvind Ulvik
- Department of Urology, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
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Abstract
PURPOSE OF REVIEW Radiological imaging techniques and applications are constantly advancing. This review will examine modern imaging techniques in the diagnosis of urolithiasis and applications for surgical planning. RECENT FINDINGS The diagnosis of urolithiasis may be done via plain film X-ray, ultrasound (US), or contrast tomography (CT) scan. US should be applied in the workup of flank pain in emergency rooms and may reduce unnecessary radiation exposure. Low dose and ultra-low-dose CT remain the diagnostic standard for most populations but remain underutilized. Single and dual-energy CT provide three-dimensional imaging that can predict stone-specific parameters that help clinicians predict stone passage likelihood, identify ideal management techniques, and possibly reduce complications. Machine learning has been increasingly applied to 3-D imaging to support clinicians in these prognostications and treatment selection. SUMMARY The diagnosis and management of urolithiasis are increasingly personalized. Patient and stone characteristics will support clinicians in treatment decision, surgical planning, and counseling.
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Management of Kidney Stone Disease in Pregnancy: A Practical and Evidence-Based Approach. Curr Urol Rep 2022; 23:263-270. [PMID: 36197640 PMCID: PMC9732063 DOI: 10.1007/s11934-022-01112-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW Suspected kidney stone disease during pregnancy is a difficult condition for health professionals to manage. This is partly due to the more limited range of diagnostic and therapeutic strategies, which can be safely applied. A comprehensive review of literature was performed to identify evidence to develop a practical guide to aid clinicians. RECENT FINDINGS Ultrasound remains the recommended first line option for imaging. Complicated cases, such as suspected infected obstructed system, require urgent decompression such as in the form of percutaneous nephrostomy. This article highlights the pharmacotherapeutic agents, which are considered safe for use in pregnancy. Where surgical intervention is indicated, evidence supports ureteroscopy to be a safe option as long as infection has been treated. Ureteroscopy can offer definitive clearance of the stone(s) and can be less burdensome regarding bothersome symptoms compared to indwelling ureteral stent or nephrostomy, which also require regular exchange due to the high propensity for encrustation in pregnancy. A multidisciplinary approach is fundamental to safely manage suspected kidney stone disease in pregnancy. Adoption of a locally agreed pathway as suggested in this article supports improved patient care.
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Kapoor SR, Maldow DJ, Baran TM, Sharma AK. Rethinking Time-to-Exchange: Outcomes of Nephrostomy Tube Placement in Pregnancy. J Vasc Interv Radiol 2021; 32:1231-1233. [PMID: 34332719 DOI: 10.1016/j.jvir.2021.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/04/2021] [Accepted: 04/07/2021] [Indexed: 02/08/2023] Open
Abstract
This study evaluated outcomes for percutaneous nephrostomy tube placement in pregnant patients, including potential complications that required early, unplanned tube exchange. A retrospective review was conducted for 51 pregnant patients and a nonpregnant cohort matched 1:1 who received percutaneous nephrostomy tube placement between 2012 and 2020. Factors potentially contributing to unplanned tube exchanges were analyzed, including gestational age, prevalence and severity of hydronephrosis, presence of renal calculi, and serum calcium level. The mean tube exchange interval was significantly shorter in the pregnant group (3.4 weeks ± 1.8 [standard deviation] vs 5.7 weeks ± 0.7, P < .0001), and pregnant subjects were significantly more likely to require reintervention before the 6-week scheduled exchange (80.4% vs 21.6%, P < .0001). The serum calcium level was lower in pregnant subjects (8.4 mg/dL ± 0.4 vs 8.9 mg/dL ± 0.7, P = .002). A shorter interval schedule (every 3 weeks) of routine percutaneous nephrostomy tube exchange in pregnant patients may be necessary to avoid complications.
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Affiliation(s)
- Sankrit R Kapoor
- Department of Biology, University of Rochester, Rochester, New York.
| | - David J Maldow
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York
| | - Timothy M Baran
- Department of Biomedical Engineering, University of Rochester, Rochester, New York; Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York
| | - Ashwani K Sharma
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York
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