Biomedical subjects

Stephen R Tolhurst

Publications and source records attributed to Stephen R Tolhurst.

8 recordsLinked to original sources

PubMed2006

Open versus laparoscopic simultaneous bilateral adrenalectomy.

OBJECTIVES: To compare our experience with synchronous bilateral adrenalectomy using laparoscopic and open techniques. Laparoscopic adrenalectomy has become the reference standard for management of benign unilateral adrenal pathologic findings. METHODS: This was a nonrandomized retrospective chart review of 12 known patients who underwent simultaneous bilateral adrenalectomy, comparing five laparoscopic and seven open procedures. One urologic surgeon performed all laparoscopic cases, and one general surgeon performed all open procedures. RESULTS: All patients had Cushing's disease or syndrome. The average patient age was 47.4 years (range 24 to 71) and 42.4 years (range 19 to 70), with an average body mass index of 38.2 kg/m2 and 36.0 kg/m2 for the laparoscopic and open groups, respectively. The operating time was on average 60 minutes longer for the laparoscopic group. No open conversions were necessary. The median blood loss (100 versus 500 mL, P < 0.01) and hematocrit drop (8.5% versus 12.6%, P = 0.05) were lower for the laparoscopic group. The transfusion rates and hospital stay trended lower in the laparoscopic group (20% versus 57% and 3 versus 8.5 days, respectively). Specimen weights for both the right and left glands trended larger for the laparoscopic group. The complication rates were similar between groups at 60% for the laparoscopic versus 71% for the open groups. CONCLUSIONS: Simultaneous laparoscopic bilateral adrenalectomy is safe and effective. Compared with the open approach, it resulted in decreased blood loss, lower transfusion rate, and a trend toward a shorter hospital stay, although the operating time was longer. The laparoscopic approach should be the treatment of choice for bilateral adrenalectomy.

Adrenalectomy↗

PubMed2006

Case report: robot-assisted laparoscopic pyeloureterostomy in a transplanted kidney with ureteral stricture.

Ureteral obstruction secondary to ischemia is the most common urologic complication of kidney transplantation. Although endoscopic management has shown satisfactory short-term success rates, surgical repair is considered the definitive therapy. To our knowledge, this procedure has been performed only through open surgery. We present a minimally invasive approach for reconstruction of a ureteral stricture in a renal transplant patient using the Da Vinci robotic system.

Adult↗

PubMed2006

Case report: Urothelial hyperplasia causing recurrent obstruction after ureteral metal stent placement in treatment of ureteroenteric anastomotic stricture.

Initial experience utilizing metal stents in the treatment of ureteroenteric anastomotic strictures has yielded promising results. However, the long-term efficacy of metal stent placement remains unknown. Further, there is a paucity of literature to describe the technical considerations associated with the surgical management of obstruction after metal stent failure. We report the case of a 67-year-old man undergoing bilateral ureteral metal stent removal and ileal conduit creation following stent failure and recurrent obstruction.

Aged↗

PubMed2006

Post-operative changes mimicking the radiographic appearance of recurrent renal cell carcinoma.

Partial nephrectomy for small renal tumors is associated with excellent long-term outcomes. In the absence of positive surgical margins, local recurrence is uncommon. Although computed tomography is associated with good diagnostic accuracy, the radiographic evaluation of some renal lesions remains difficult. This difficulty can be greater in the period following surgery, when post-operative tissue changes can result in abnormal radiographic findings. We report a case of benign post-operative changes mimicking the radiographic appearance of recurrent renal cell carcinoma.

Aged↗

PubMed2005

Complications after cystectomy and urinary diversion in patients previously treated for localized prostate cancer.

OBJECTIVES: To assess the morbidity associated with radical cystectomy in patients who had previously undergone definitive treatment of prostate cancer. METHODS: A retrospective review was undertaken, identifying 35 patients undergoing radical cystectomy with a previous history of radical prostatectomy and/or radiotherapy for prostate cancer. The clinical and surgical information was analyzed to assess patient outcomes. Specific attention was given to the rate, severity, and time course of the postoperative complications. In addition, outcomes after orthotopic and continent cutaneous diversion in this patient cohort were examined. RESULTS: An overall complication rate of 76% was seen in this patient cohort, with 47% of patients experiencing a complication that presented later than postoperative day 30. Radiotherapy was associated with a slightly greater complication rate compared with radical prostatectomy monotherapy (77% versus 71%). Continent urinary diversion (n = 14) was associated with increased morbidity compared with ileal conduit diversion (n = 21). However, a greater percentage of the complications occurring in patients undergoing ileal conduit diversion were major (80% versus 67%). CONCLUSIONS: Our experience has suggested that radical cystectomy in patients previously treated for prostate cancer with radiotherapy and/or radical prostatectomy may be associated with a greater level of morbidity than previously reported. This finding may be, in part, because a significant portion of complications present in a delayed fashion and, as such, have not been seen in previous reports with limited follow-up. For this reason, careful consideration of these risks is necessary when counseling this patient cohort regarding the decision to undergo radical cystectomy.

Aged↗

PubMed2005

Simplifying laparoscopic partial nephrectomy: technical considerations for reproducible outcomes.

OBJECTIVES: To present our technique, modifications, and experience of laparoscopic partial nephrectomy (LPN). Nephron-sparing surgery is an increasingly accepted treatment for selected T1a kidney tumors. Because of the more complex surgical technique involved, LPN is evolving more slowly than laparoscopic radical nephrectomy. METHODS: The data of 41 consecutive patients with T1a tumors who had undergone LPN from October 2002 to March 2004 were retrospectively reviewed. Four main considerations in our surgical technique were consistently used: (a) LPN was performed in the transperitoneal approach, (b) a suture traction system was placed on the kidney when tumor visualization was challenging, (c) sutures and bolsters were preloaded on the abdominal wall, and (d) hemostasis and closure of the renal defect was performed using Lapra-Ty clips, eliminating knot-tying. RESULTS: The mean patient age was 63.1 years. The mean warm ischemia time was 29.7 minutes, and the mean surgical time was 226.5 minutes. In 26 of 41 patients, the collecting system was entered and repaired. The median estimated blood loss was 150 mL, with a mean tumor size of 2.2 cm. Three cases were converted to open surgery. Five complications (13.2%) occurred. The median hospital stay was 2 days. Of the 41 specimens, 11 were benign. All surgical margins were negative. The mean follow-up was 7.5 months. CONCLUSIONS: Although technically challenging, LPN is emerging as an alternative to open partial nephrectomy. With several easily applied technical considerations, we have simplified LPN, making the procedure more efficient. We believe that the technical considerations we describe can increase the feasibility and ease of LPN for Stage T1a exophytic renal tumors.

Adult↗

PubMed2005

Defining maximal renal tolerance to warm ischemia in porcine laparoscopic and open surgery model.

OBJECTIVES: To establish the upper limit for warm ischemia time (WIT) beyond which irreversible renal failure will occur in a single-kidney porcine model. The maximal renal tolerance during WIT is currently under revision. Traditionally, 30 minutes was defined as the safe limit for renal WIT. However, accumulating data have suggested that a WIT of up to 90 minutes may not result in permanent damage. METHODS: Twenty female pigs weighing 60 to 80 lb at arrival underwent initial right laparoscopic nephrectomy to create a single-kidney model. Twelve days later, the animals were randomized into four groups of 5 animals each: 120 minutes of open WIT, 120 minutes of laparoscopic WIT, 5 open controls, and 5 laparoscopic controls. Renal function was assessed with serial glomerular filtration rate and serum creatinine measurements, which were assessed preoperatively and on postoperative days (PODs) 1, 3, 8, and 15. RESULTS: No significant difference existed between the laparoscopic and open groups. The glomerular filtration rate reached the lowest value and the serum creatinine levels peaked on POD 3 and were significantly different from baseline at PODs 1, 3, 8, and 15. Renal function did not return to baseline by POD 15, and 66% of the animals showed significant renal insufficiency (more than 25% decline in glomerular filtration rate) in the study group. CONCLUSIONS: After 120 minutes of WIT, no difference in renal function recovery was observed between the laparoscopic and open techniques. A WIT of 120 minutes produced significant renal failure and mortality. Thus, 120 minutes of WIT in the single kidney porcine model exceeds the kidney's tolerance to ischemia.

Animals↗

PubMedDate not supplied

Well-differentiated papillary mesothelioma occurring in the tunica vaginalis of the testis with contralateral atypical mesothelial hyperplasia.

Well-differentiated papillary mesothelioma (WDPM) occurs rarely in the paratesticular region, with only a handful of published case reports. Often presenting with recurrent hydrocele, WDPM is a multifocal mesothelial proliferation with a predominantly indolent clinical course. Accordingly, pathologic distinction of this lesion from true malignant mesothelioma is crucial, although it may be difficult because of the variability of associated histologic features. In addition, rare cases of WDPM have progressed to malignant mesothelioma, leading to its classification as a tumor of low malignant potential. Here, we report a case of multifocal WDPM occurring in the tunica vaginalis and tunica albuginea, with contralateral atypical mesothelial hyperplasia, a potentially premalignant lesion.

Adult↗