The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Junichi Matsuzaki - One of the best experts on this subject based on the ideXlab platform.
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ureteroscopy assisted retrograde Nephrostomy uarn without ureteral access sheath uas
International Journal of Surgery Case Reports, 2015Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Junichi MatsuzakiAbstract:Introduction We previously described ureteroscopy assisted retrograde Nephrostomy (UARN). In UARN, it is possible to continuously visualize the dilation of the ureter from puncture to insertion of the nephroaccess sheath with minimal complication. But in the course of making Nephrostomy, UARN requires ureteral access sheath (UAS). UAS has a potential risk of ureteral stricture. Herein, we report the first case of UARN without the use of UAS.
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effectiveness of ureteroscopy assisted retrograde Nephrostomy uarn for percutaneous nephrolithotomy pcnl
PLOS ONE, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Yoshinobu Kubota, Yoshitake Kato, Junichi MatsuzakiAbstract:Objective To determine the impact of ureteroscopy-assisted retrograde Nephrostomy (UARN) during percutaneous nephrolithotomy (PCNL).
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ureteroscopy assisted retrograde Nephrostomy a new technique for percutaneous nephrolithotomy pcnl
BJUI, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Minoru Yoshida, Junichi MatsuzakiAbstract:UNLABELLED: Study Type - Therapy (case series). Level of Evidence 4. What's known on the subject? and What does the study add? Retrograde Nephrostomy was first developed by Lawson et al. in 1983, and Hunter et al. reported 30 cases of retrograde Nephrostomy in 1987. This procedure uses less radiation exposure and has a shorter duration compared with the previous percutaneous Nephrostomy techniques. Retrograde Nephrostomy using Lawson's procedure was reported in the late 1980s by several authors. But since then, few studies have been reported about this procedure due to the development of ultrasonography assisted percutaneous Nephrostomy. With the arrival and development of the flexible ureteroscope (URS) both observation and manipulation in the renal pelvis are now easily achieved. The present procedure provides less radiation exposure, less bleeding, and a shorter procedure than previous percutaneous Nephrostomy techniques. Using this procedure, after the needle has exited through the skin, no further steps are required in preparation for dilatation. In the present study, we continuously visualised from puncture to inserting the nephron-access sheath with the URS. OBJECTIVE: • To describe a technique for ureteroscopy assisted retrograde Nephrostomy. PATIENTS AND METHODS: • Under general and epidural anaesthesia, the patient is placed in a modified-Valdivia position. Flexible ureteroscopy is carried out, and a Lawson retrograde Nephrostomy puncture wire is placed in the ureteroscope (URS). • After the needle has exited through the skin, no further steps are required in preparation for dilatation. RESULTS: • After informed consent was obtained, two patients (a 43-year-old man with left renal stones and a 57-year-old woman with right renal stones) underwent this procedure. • The URS was positioned in the middle posterior calyx and punctured toward the skin. CONCLUSIONS: • This procedure involves less radiation exposure and shorter surgery than the previous percutaneous Nephrostomy technique. • Our technique represents another new option for percutaneous nephrolithotomy in patients with a non-dilated intrarenal collecting system.
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ureteroscopy assisted retrograde Nephrostomy for lower calyx calculi in horseshoe kidney two case reports
Journal of Medical Case Reports, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Katsuyuki Tanaka, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Introduction We previously reported on the effectiveness of ureteroscopy-assisted retrograde Nephrostomy during percutaneous nephrolithotomy and report two cases of lower calyx calculi in horseshoe kidney that were successfully treated with ureteroscopy-assisted retrograde Nephrostomy. During the ureteroscopy-assisted retrograde Nephrostomy procedure, a ureteroscope is advanced in the desired calyx and a Lawson retrograde Nephrostomy puncture wire is inserted. The wire is advanced through the calyx to exit the skin. The wire is then used for the percutaneous dilation.
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Ureteroscopy-Assisted Retrograde Nephrostomy
Journal of Endourology Part B Videourology, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Abstract Introduction: Lawson et al first developed retrograde Nephrostomy in 1983.1 Hunter et al reported 30 cases of retrograde Nephrostomy in 1985.2 Ureteroscopy (URS)-assisted retrograde Nephrostomy (UARN) was reported as a new technique for percutaneous nephrolithotomy (PCNL) in 2011, and this institute performed more than 30 cases of UARN.3 This video presents the details of the UARN technique based on this experience. Materials and Methods: The patient is placed in the Galdakao-modified Valdivia position under general and epidural anesthesia.4 A ureteral access sheath (UAS) is inserted and a flexible ureteroscope (Flex-X2®; Karl Storz) is inserted through the UAS. The target calculi are carefully observed to identify the appropriate renal calyx to be punctured. A Lawson retrograde Nephrostomy puncture wire (Lawson Retrograde Nephrostomy Wire Puncture Set; COOK Urological) is carefully set into the flexible URS. The flexible ureteroscope approaches the desired renal calyx again, and the route from t...
Takashi Kawahara - One of the best experts on this subject based on the ideXlab platform.
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ureteroscopy assisted retrograde Nephrostomy uarn without ureteral access sheath uas
International Journal of Surgery Case Reports, 2015Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Junichi MatsuzakiAbstract:Introduction We previously described ureteroscopy assisted retrograde Nephrostomy (UARN). In UARN, it is possible to continuously visualize the dilation of the ureter from puncture to insertion of the nephroaccess sheath with minimal complication. But in the course of making Nephrostomy, UARN requires ureteral access sheath (UAS). UAS has a potential risk of ureteral stricture. Herein, we report the first case of UARN without the use of UAS.
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effectiveness of ureteroscopy assisted retrograde Nephrostomy uarn for percutaneous nephrolithotomy pcnl
PLOS ONE, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Yoshinobu Kubota, Yoshitake Kato, Junichi MatsuzakiAbstract:Objective To determine the impact of ureteroscopy-assisted retrograde Nephrostomy (UARN) during percutaneous nephrolithotomy (PCNL).
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ureteroscopy assisted retrograde Nephrostomy a new technique for percutaneous nephrolithotomy pcnl
BJUI, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Minoru Yoshida, Junichi MatsuzakiAbstract:UNLABELLED: Study Type - Therapy (case series). Level of Evidence 4. What's known on the subject? and What does the study add? Retrograde Nephrostomy was first developed by Lawson et al. in 1983, and Hunter et al. reported 30 cases of retrograde Nephrostomy in 1987. This procedure uses less radiation exposure and has a shorter duration compared with the previous percutaneous Nephrostomy techniques. Retrograde Nephrostomy using Lawson's procedure was reported in the late 1980s by several authors. But since then, few studies have been reported about this procedure due to the development of ultrasonography assisted percutaneous Nephrostomy. With the arrival and development of the flexible ureteroscope (URS) both observation and manipulation in the renal pelvis are now easily achieved. The present procedure provides less radiation exposure, less bleeding, and a shorter procedure than previous percutaneous Nephrostomy techniques. Using this procedure, after the needle has exited through the skin, no further steps are required in preparation for dilatation. In the present study, we continuously visualised from puncture to inserting the nephron-access sheath with the URS. OBJECTIVE: • To describe a technique for ureteroscopy assisted retrograde Nephrostomy. PATIENTS AND METHODS: • Under general and epidural anaesthesia, the patient is placed in a modified-Valdivia position. Flexible ureteroscopy is carried out, and a Lawson retrograde Nephrostomy puncture wire is placed in the ureteroscope (URS). • After the needle has exited through the skin, no further steps are required in preparation for dilatation. RESULTS: • After informed consent was obtained, two patients (a 43-year-old man with left renal stones and a 57-year-old woman with right renal stones) underwent this procedure. • The URS was positioned in the middle posterior calyx and punctured toward the skin. CONCLUSIONS: • This procedure involves less radiation exposure and shorter surgery than the previous percutaneous Nephrostomy technique. • Our technique represents another new option for percutaneous nephrolithotomy in patients with a non-dilated intrarenal collecting system.
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ureteroscopy assisted retrograde Nephrostomy for lower calyx calculi in horseshoe kidney two case reports
Journal of Medical Case Reports, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Katsuyuki Tanaka, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Introduction We previously reported on the effectiveness of ureteroscopy-assisted retrograde Nephrostomy during percutaneous nephrolithotomy and report two cases of lower calyx calculi in horseshoe kidney that were successfully treated with ureteroscopy-assisted retrograde Nephrostomy. During the ureteroscopy-assisted retrograde Nephrostomy procedure, a ureteroscope is advanced in the desired calyx and a Lawson retrograde Nephrostomy puncture wire is inserted. The wire is advanced through the calyx to exit the skin. The wire is then used for the percutaneous dilation.
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Ureteroscopy-Assisted Retrograde Nephrostomy
Journal of Endourology Part B Videourology, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Abstract Introduction: Lawson et al first developed retrograde Nephrostomy in 1983.1 Hunter et al reported 30 cases of retrograde Nephrostomy in 1985.2 Ureteroscopy (URS)-assisted retrograde Nephrostomy (UARN) was reported as a new technique for percutaneous nephrolithotomy (PCNL) in 2011, and this institute performed more than 30 cases of UARN.3 This video presents the details of the UARN technique based on this experience. Materials and Methods: The patient is placed in the Galdakao-modified Valdivia position under general and epidural anesthesia.4 A ureteral access sheath (UAS) is inserted and a flexible ureteroscope (Flex-X2®; Karl Storz) is inserted through the UAS. The target calculi are carefully observed to identify the appropriate renal calyx to be punctured. A Lawson retrograde Nephrostomy puncture wire (Lawson Retrograde Nephrostomy Wire Puncture Set; COOK Urological) is carefully set into the flexible URS. The flexible ureteroscope approaches the desired renal calyx again, and the route from t...
Marshall L. Stoller - One of the best experts on this subject based on the ideXlab platform.
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determinants of Nephrostomy tube dislodgment after percutaneous nephrolithotomy
Journal of Endourology, 2015Co-Authors: David Bayne, Eric Taylor, Lindsay A Hampson, Marshall L. StollerAbstract:Abstract Background and Purpose: Percutaneous nephrolithotomy (PCNL) traditionally necessitates the placement of a Nephrostomy tube at the conclusion of the surgical procedure. Although tubeless PCNL has become more popular, patients with complex problems still need traditional Nephrostomy tube drainage. The goal of this study was to investigate whether patient body mass index (BMI) impacted inadvertent Nephrostomy tube dislodgement. Furthermore, we hoped to determine whether Nephrostomy tube type impacted tube dislodgement rates. Methods: A retrospective review between 2005 and 2012 of 475 consecutive PCNL cases was undertaken. Patients were categorized based on the type of Nephrostomy tube placed. BMI was examined as a continuous variable. The primary outcome of Nephrostomy tube dislodgment was determined based on imaging obtained at the time of PCNL and postoperative hospitalization. Logistic regression analysis was then used to adjust for Nephrostomy tube type and BMI. Results: Overall, 24 (5.5%) tota...
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risk of injury to adjacent organs with lower pole fluoroscopically guided percutaneous Nephrostomy evaluation with prone supine and multiplanar reformatted ct
Journal of Vascular and Interventional Radiology, 2005Co-Authors: Dana N Tuttle, Marshall L. Stoller, Maxwell V Meng, Richard S Breiman, Fergus V CoakleyAbstract:PURPOSE To assess the risk of injury to organs near the kidney during lower-pole fluoroscopically guided percutaneous Nephrostomy by evaluation of prone, supine, and multiplanar reformatted computed tomography (CT). MATERIALS AND METHODS Eighty-three patients who underwent prone and supine CT examinations were identified retrospectively. The expected path of Nephrostomy tube placement to the lower-pole calyx was simulated on prone and supine axial images and multiplanar CT reformations. Intervening organs along this path were considered at risk for injury and were recorded for each kidney ( N = 166). RESULTS The risk of organ injury as determined on multiplanar reformatted prone images ( n = 5) and supine images ( n = 0) was significantly less ( P n = 25) or supine images ( n = 10). The colon was the only organ identified to be at risk for injury during the simulated lower-pole percutaneous Nephrostomy placement; spleen and liver were not seen along the Nephrostomy path on axial or multiplanar reformatted images. CONCLUSION Lower-pole fluoroscopically guided percutaneous Nephrostomy carries a low risk of visceral injury, and the risk of injury is overestimated by evaluation of axial CT images alone compared with oblique parasagittal reformations.
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Entrapped Malecot Nephrostomy tube: etiology and management.
The Journal of Urology, 1995Co-Authors: Joseph I. Sardina, Damien M. Bolton, Marshall L. StollerAbstract:AbstractNephrostomy tubes occasionally are resistant to extraction. During the last 7 years 3 such patients with entrapped Malecot Nephrostomy tubes have been treated successfully at our university. The entrapped Nephrostomy tubes were removed by endoscopically incising an anchoring tissue bridge that had grown over a flange. A small endoscope was easily advanced through the lumen of the entrapped catheter to allow for adequate visualization and electrocautery of the anchoring tissue bridge. With this method an entrapped Malecot Nephrostomy tube may be removed intact without significant injury to the renal parenchyma. Malecot Nephrostomy tubes should be used with caution for long-term drainage of small intrarenal pelves.
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Urologist directed percutaneous Nephrostomy tube placement
Journal of Urology, 1994Co-Authors: K. G. Mahaffey, D M Bolton, Marshall L. StollerAbstract:A retrospective analysis of 100 consecutive ultrasonically guided percutaneous Nephrostomy tubes placed under the guidance of urologists was done. Complications related to tube insertion included sepsis in 3% of the cases, renal pelvic perforations in 2% and hemorrhage in 1%. There were no deaths and no need for open surgical intervention to manage these complications. An additional 21% of the tubes malfunctioned more than 24 hours after insertion, including dislodgement in 11%, occlusion in 6%, hemorrhage in 1%, peritubular leakage in 1%, puncture site infection in 1% and severe incrustation in 1%. These delayed complications were independent of tube type. Nephrostomy tubes may be placed safely by urologists. Urologists usually direct the need for percutaneous Nephrostomy tube placement and use these ports for endourological manipulations and, therefore, they should have a greater role in catheter insertion.
Hiroji Uemura - One of the best experts on this subject based on the ideXlab platform.
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ureteroscopy assisted retrograde Nephrostomy uarn without ureteral access sheath uas
International Journal of Surgery Case Reports, 2015Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Junichi MatsuzakiAbstract:Introduction We previously described ureteroscopy assisted retrograde Nephrostomy (UARN). In UARN, it is possible to continuously visualize the dilation of the ureter from puncture to insertion of the nephroaccess sheath with minimal complication. But in the course of making Nephrostomy, UARN requires ureteral access sheath (UAS). UAS has a potential risk of ureteral stricture. Herein, we report the first case of UARN without the use of UAS.
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effectiveness of ureteroscopy assisted retrograde Nephrostomy uarn for percutaneous nephrolithotomy pcnl
PLOS ONE, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Yoshinobu Kubota, Yoshitake Kato, Junichi MatsuzakiAbstract:Objective To determine the impact of ureteroscopy-assisted retrograde Nephrostomy (UARN) during percutaneous nephrolithotomy (PCNL).
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ureteroscopy assisted retrograde Nephrostomy a new technique for percutaneous nephrolithotomy pcnl
BJUI, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Minoru Yoshida, Junichi MatsuzakiAbstract:UNLABELLED: Study Type - Therapy (case series). Level of Evidence 4. What's known on the subject? and What does the study add? Retrograde Nephrostomy was first developed by Lawson et al. in 1983, and Hunter et al. reported 30 cases of retrograde Nephrostomy in 1987. This procedure uses less radiation exposure and has a shorter duration compared with the previous percutaneous Nephrostomy techniques. Retrograde Nephrostomy using Lawson's procedure was reported in the late 1980s by several authors. But since then, few studies have been reported about this procedure due to the development of ultrasonography assisted percutaneous Nephrostomy. With the arrival and development of the flexible ureteroscope (URS) both observation and manipulation in the renal pelvis are now easily achieved. The present procedure provides less radiation exposure, less bleeding, and a shorter procedure than previous percutaneous Nephrostomy techniques. Using this procedure, after the needle has exited through the skin, no further steps are required in preparation for dilatation. In the present study, we continuously visualised from puncture to inserting the nephron-access sheath with the URS. OBJECTIVE: • To describe a technique for ureteroscopy assisted retrograde Nephrostomy. PATIENTS AND METHODS: • Under general and epidural anaesthesia, the patient is placed in a modified-Valdivia position. Flexible ureteroscopy is carried out, and a Lawson retrograde Nephrostomy puncture wire is placed in the ureteroscope (URS). • After the needle has exited through the skin, no further steps are required in preparation for dilatation. RESULTS: • After informed consent was obtained, two patients (a 43-year-old man with left renal stones and a 57-year-old woman with right renal stones) underwent this procedure. • The URS was positioned in the middle posterior calyx and punctured toward the skin. CONCLUSIONS: • This procedure involves less radiation exposure and shorter surgery than the previous percutaneous Nephrostomy technique. • Our technique represents another new option for percutaneous nephrolithotomy in patients with a non-dilated intrarenal collecting system.
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ureteroscopy assisted retrograde Nephrostomy for lower calyx calculi in horseshoe kidney two case reports
Journal of Medical Case Reports, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Katsuyuki Tanaka, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Introduction We previously reported on the effectiveness of ureteroscopy-assisted retrograde Nephrostomy during percutaneous nephrolithotomy and report two cases of lower calyx calculi in horseshoe kidney that were successfully treated with ureteroscopy-assisted retrograde Nephrostomy. During the ureteroscopy-assisted retrograde Nephrostomy procedure, a ureteroscope is advanced in the desired calyx and a Lawson retrograde Nephrostomy puncture wire is inserted. The wire is advanced through the calyx to exit the skin. The wire is then used for the percutaneous dilation.
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Ureteroscopy-Assisted Retrograde Nephrostomy
Journal of Endourology Part B Videourology, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Abstract Introduction: Lawson et al first developed retrograde Nephrostomy in 1983.1 Hunter et al reported 30 cases of retrograde Nephrostomy in 1985.2 Ureteroscopy (URS)-assisted retrograde Nephrostomy (UARN) was reported as a new technique for percutaneous nephrolithotomy (PCNL) in 2011, and this institute performed more than 30 cases of UARN.3 This video presents the details of the UARN technique based on this experience. Materials and Methods: The patient is placed in the Galdakao-modified Valdivia position under general and epidural anesthesia.4 A ureteral access sheath (UAS) is inserted and a flexible ureteroscope (Flex-X2®; Karl Storz) is inserted through the UAS. The target calculi are carefully observed to identify the appropriate renal calyx to be punctured. A Lawson retrograde Nephrostomy puncture wire (Lawson Retrograde Nephrostomy Wire Puncture Set; COOK Urological) is carefully set into the flexible URS. The flexible ureteroscope approaches the desired renal calyx again, and the route from t...
Hideyuki Terao - One of the best experts on this subject based on the ideXlab platform.
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ureteroscopy assisted retrograde Nephrostomy uarn without ureteral access sheath uas
International Journal of Surgery Case Reports, 2015Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Junichi MatsuzakiAbstract:Introduction We previously described ureteroscopy assisted retrograde Nephrostomy (UARN). In UARN, it is possible to continuously visualize the dilation of the ureter from puncture to insertion of the nephroaccess sheath with minimal complication. But in the course of making Nephrostomy, UARN requires ureteral access sheath (UAS). UAS has a potential risk of ureteral stricture. Herein, we report the first case of UARN without the use of UAS.
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effectiveness of ureteroscopy assisted retrograde Nephrostomy uarn for percutaneous nephrolithotomy pcnl
PLOS ONE, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Hiroji Uemura, Yoshinobu Kubota, Yoshitake Kato, Junichi MatsuzakiAbstract:Objective To determine the impact of ureteroscopy-assisted retrograde Nephrostomy (UARN) during percutaneous nephrolithotomy (PCNL).
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ureteroscopy assisted retrograde Nephrostomy a new technique for percutaneous nephrolithotomy pcnl
BJUI, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Minoru Yoshida, Junichi MatsuzakiAbstract:UNLABELLED: Study Type - Therapy (case series). Level of Evidence 4. What's known on the subject? and What does the study add? Retrograde Nephrostomy was first developed by Lawson et al. in 1983, and Hunter et al. reported 30 cases of retrograde Nephrostomy in 1987. This procedure uses less radiation exposure and has a shorter duration compared with the previous percutaneous Nephrostomy techniques. Retrograde Nephrostomy using Lawson's procedure was reported in the late 1980s by several authors. But since then, few studies have been reported about this procedure due to the development of ultrasonography assisted percutaneous Nephrostomy. With the arrival and development of the flexible ureteroscope (URS) both observation and manipulation in the renal pelvis are now easily achieved. The present procedure provides less radiation exposure, less bleeding, and a shorter procedure than previous percutaneous Nephrostomy techniques. Using this procedure, after the needle has exited through the skin, no further steps are required in preparation for dilatation. In the present study, we continuously visualised from puncture to inserting the nephron-access sheath with the URS. OBJECTIVE: • To describe a technique for ureteroscopy assisted retrograde Nephrostomy. PATIENTS AND METHODS: • Under general and epidural anaesthesia, the patient is placed in a modified-Valdivia position. Flexible ureteroscopy is carried out, and a Lawson retrograde Nephrostomy puncture wire is placed in the ureteroscope (URS). • After the needle has exited through the skin, no further steps are required in preparation for dilatation. RESULTS: • After informed consent was obtained, two patients (a 43-year-old man with left renal stones and a 57-year-old woman with right renal stones) underwent this procedure. • The URS was positioned in the middle posterior calyx and punctured toward the skin. CONCLUSIONS: • This procedure involves less radiation exposure and shorter surgery than the previous percutaneous Nephrostomy technique. • Our technique represents another new option for percutaneous nephrolithotomy in patients with a non-dilated intrarenal collecting system.
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ureteroscopy assisted retrograde Nephrostomy for lower calyx calculi in horseshoe kidney two case reports
Journal of Medical Case Reports, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Katsuyuki Tanaka, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Introduction We previously reported on the effectiveness of ureteroscopy-assisted retrograde Nephrostomy during percutaneous nephrolithotomy and report two cases of lower calyx calculi in horseshoe kidney that were successfully treated with ureteroscopy-assisted retrograde Nephrostomy. During the ureteroscopy-assisted retrograde Nephrostomy procedure, a ureteroscope is advanced in the desired calyx and a Lawson retrograde Nephrostomy puncture wire is inserted. The wire is advanced through the calyx to exit the skin. The wire is then used for the percutaneous dilation.
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Ureteroscopy-Assisted Retrograde Nephrostomy
Journal of Endourology Part B Videourology, 2012Co-Authors: Takashi Kawahara, Hideyuki Terao, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi MatsuzakiAbstract:Abstract Introduction: Lawson et al first developed retrograde Nephrostomy in 1983.1 Hunter et al reported 30 cases of retrograde Nephrostomy in 1985.2 Ureteroscopy (URS)-assisted retrograde Nephrostomy (UARN) was reported as a new technique for percutaneous nephrolithotomy (PCNL) in 2011, and this institute performed more than 30 cases of UARN.3 This video presents the details of the UARN technique based on this experience. Materials and Methods: The patient is placed in the Galdakao-modified Valdivia position under general and epidural anesthesia.4 A ureteral access sheath (UAS) is inserted and a flexible ureteroscope (Flex-X2®; Karl Storz) is inserted through the UAS. The target calculi are carefully observed to identify the appropriate renal calyx to be punctured. A Lawson retrograde Nephrostomy puncture wire (Lawson Retrograde Nephrostomy Wire Puncture Set; COOK Urological) is carefully set into the flexible URS. The flexible ureteroscope approaches the desired renal calyx again, and the route from t...