The Experts below are selected from a list of 63 Experts worldwide ranked by ideXlab platform
Michael B Chancellor - One of the best experts on this subject based on the ideXlab platform.
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botulinum toxin urethral sphincter injection to restore bladder emptying in men and women with voiding dysfunction
The Journal of Urology, 2001Co-Authors: Michael W Phelan, Michael E Franks, George T Somogyi, Teruhiko Yokoyama, Matthew O Fraser, John P Lavelle, Naoki Yoshimura, Michael B ChancellorAbstract:Purpose: Botulinum toxin injection into the external urinary sphincter in spinal cord injured men with detrusor-sphincter dyssynergia has been reported. We expand the clinical use of botulinum toxin for a variety of bladder outlet obstructions and to decrease outlet resistance in patients with acontractile detrusor but who wish to void by the Valsalva maneuver.Materials and Methods: Prospective treatment was performed for voiding dysfunction in 8 men and 13 women 34 to 74 years old. The reasons for voiding dysfunction included neurogenic detrusor-sphincter dyssynergia in 12 cases, pelvic floor spasticity in 8 and acontractile detrusor in 1 patient with multiple sclerosis who wished to void by the Valsalva maneuver. Using a Rigid Cystoscope and a collagen injection needle, a total of 80 to 100 units of botulinum A toxin (Botox * *Allergan, Inc., Irvine, California.) were injected into the external sphincter at the 3, 6, 9 and 12 o’clock positions.Results: Preoperatively 19 of 21 patients were on indwelling...
Michael W Phelan - One of the best experts on this subject based on the ideXlab platform.
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botulinum toxin urethral sphincter injection to restore bladder emptying in men and women with voiding dysfunction
The Journal of Urology, 2001Co-Authors: Michael W Phelan, Michael E Franks, George T Somogyi, Teruhiko Yokoyama, Matthew O Fraser, John P Lavelle, Naoki Yoshimura, Michael B ChancellorAbstract:Purpose: Botulinum toxin injection into the external urinary sphincter in spinal cord injured men with detrusor-sphincter dyssynergia has been reported. We expand the clinical use of botulinum toxin for a variety of bladder outlet obstructions and to decrease outlet resistance in patients with acontractile detrusor but who wish to void by the Valsalva maneuver.Materials and Methods: Prospective treatment was performed for voiding dysfunction in 8 men and 13 women 34 to 74 years old. The reasons for voiding dysfunction included neurogenic detrusor-sphincter dyssynergia in 12 cases, pelvic floor spasticity in 8 and acontractile detrusor in 1 patient with multiple sclerosis who wished to void by the Valsalva maneuver. Using a Rigid Cystoscope and a collagen injection needle, a total of 80 to 100 units of botulinum A toxin (Botox * *Allergan, Inc., Irvine, California.) were injected into the external sphincter at the 3, 6, 9 and 12 o’clock positions.Results: Preoperatively 19 of 21 patients were on indwelling...
Stephen Y Nakada - One of the best experts on this subject based on the ideXlab platform.
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the modern history and evolution of percutaneous nephrolithotomy
Journal of Endourology, 2015Co-Authors: Sutchin R Patel, Stephen Y NakadaAbstract:Introduction Serendipity, innovative physicians, evolving techniques for renal access, and improvements in equipment and radiology led to the evolution of percutaneous nephrolithotomy (PCNL). Methods We searched urology texts and the literature for sources pertaining to the history and development of PCNL. Results In 1941, Rupel and Brown performed the first nephroscopy when a Rigid Cystoscope was passed into the kidney following open surgery. Willard Goodwin, in 1955, while trying to perform a renal arteriogram, placed a needle into the collecting system of a hydronephrotic kidney and performed the first antegrade nephrostogram. He left a tube to drain the kidney, thereby placing the first nephrostomy tube. By 1976, Fernstrom and Johansson were the first to describe a technique for extracting renal calculi through a percutaneous nephrostomy under radiological control. In 1978, Arthur Smith, would describe the first antegrade stent placement when he introduced a Gibbons stent through a percutaneous nephrostomy in a patient with a reimplanted ureter. Dr. Smith would coin the term "endourology" to describe closed, controlled manipulation of the genitourinary tract. His collaboration with Kurt Amplatz, an interventional radiologist and medical inventor, would lead to numerous innovations that would further advance PCNL. In the 1980s the process of renal access and tract dilation was improved upon and the use of a Rigid Cystoscope was replaced by offset nephroscopes with a large straight working channel. Radiographic innovations, including improvements in fluoroscopy would further aid in renal access. The development of various lithotripsy devices and the introduction of the holmium laser improved the efficiency of stone fragmentation and clearance. The increased clinical experience and utilization of PCNL would lead to the characterization of stone-free rates and complications for the procedure. Conclusion Serendipity, innovations in renal access, optics, radiology, and improvements in lithotripsy all contributed to the modern day PCNL.
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the modern history and evolution of percutaneous nephrolithotomy
Journal of Endourology, 2015Co-Authors: Sutchin R Patel, Stephen Y NakadaAbstract:Abstract Introduction: Serendipity, innovative physicians, evolving techniques for renal access, and improvements in equipment and radiology led to the evolution of percutaneous nephrolithotomy (PCNL). Methods: We searched urology texts and the literature for sources pertaining to the history and development of PCNL. Results: In 1941, Rupel and Brown performed the first nephroscopy when a Rigid Cystoscope was passed into the kidney following open surgery. Willard Goodwin, in 1955, while trying to perform a renal arteriogram, placed a needle into the collecting system of a hydronephrotic kidney and performed the first antegrade nephrostogram. He left a tube to drain the kidney, thereby placing the first nephrostomy tube. By 1976, Fernstrom and Johansson were the first to describe a technique for extracting renal calculi through a percutaneous nephrostomy under radiological control. In 1978, Arthur Smith, would describe the first antegrade stent placement when he introduced a Gibbons stent through a percuta...
Matthew O Fraser - One of the best experts on this subject based on the ideXlab platform.
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botulinum toxin urethral sphincter injection to restore bladder emptying in men and women with voiding dysfunction
The Journal of Urology, 2001Co-Authors: Michael W Phelan, Michael E Franks, George T Somogyi, Teruhiko Yokoyama, Matthew O Fraser, John P Lavelle, Naoki Yoshimura, Michael B ChancellorAbstract:Purpose: Botulinum toxin injection into the external urinary sphincter in spinal cord injured men with detrusor-sphincter dyssynergia has been reported. We expand the clinical use of botulinum toxin for a variety of bladder outlet obstructions and to decrease outlet resistance in patients with acontractile detrusor but who wish to void by the Valsalva maneuver.Materials and Methods: Prospective treatment was performed for voiding dysfunction in 8 men and 13 women 34 to 74 years old. The reasons for voiding dysfunction included neurogenic detrusor-sphincter dyssynergia in 12 cases, pelvic floor spasticity in 8 and acontractile detrusor in 1 patient with multiple sclerosis who wished to void by the Valsalva maneuver. Using a Rigid Cystoscope and a collagen injection needle, a total of 80 to 100 units of botulinum A toxin (Botox * *Allergan, Inc., Irvine, California.) were injected into the external sphincter at the 3, 6, 9 and 12 o’clock positions.Results: Preoperatively 19 of 21 patients were on indwelling...
John P Lavelle - One of the best experts on this subject based on the ideXlab platform.
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botulinum toxin urethral sphincter injection to restore bladder emptying in men and women with voiding dysfunction
The Journal of Urology, 2001Co-Authors: Michael W Phelan, Michael E Franks, George T Somogyi, Teruhiko Yokoyama, Matthew O Fraser, John P Lavelle, Naoki Yoshimura, Michael B ChancellorAbstract:Purpose: Botulinum toxin injection into the external urinary sphincter in spinal cord injured men with detrusor-sphincter dyssynergia has been reported. We expand the clinical use of botulinum toxin for a variety of bladder outlet obstructions and to decrease outlet resistance in patients with acontractile detrusor but who wish to void by the Valsalva maneuver.Materials and Methods: Prospective treatment was performed for voiding dysfunction in 8 men and 13 women 34 to 74 years old. The reasons for voiding dysfunction included neurogenic detrusor-sphincter dyssynergia in 12 cases, pelvic floor spasticity in 8 and acontractile detrusor in 1 patient with multiple sclerosis who wished to void by the Valsalva maneuver. Using a Rigid Cystoscope and a collagen injection needle, a total of 80 to 100 units of botulinum A toxin (Botox * *Allergan, Inc., Irvine, California.) were injected into the external sphincter at the 3, 6, 9 and 12 o’clock positions.Results: Preoperatively 19 of 21 patients were on indwelling...
