Richard K. Babayan

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An animal model was established to study the effects of elevated intra-abdominal pressure (IAP) on systemic and renal hemodynamics during laparoscopy. In a pilot study in five dogs, we simultaneously recorded carotid artery blood flow (CABF), carotid artery blood pressure (CABP), inferior vena caval pressure (IVCP), renal parenchymal blood flow, and IAP.(More)
PURPOSE We studied the effect of chronic ischemia on prostatic smooth muscle contraction in the rabbit. MATERIALS AND METHODS New Zealand male rabbits weighing 3 to 3.5 kg were assigned to 2 groups. Group 1 (10 rabbits) underwent balloon endothelial injury of the iliac arteries and received a 0.5% cholesterol diet for 4 weeks and then a regular diet for 8(More)
Laser Doppler flowmetry (LDF) is a sensitive method for the measurement of microvascular blood flow in tissue. The method has been found useful for estimating skin, liver, or gastrointestinal blood flow. Whether it can be applied laparoscopically and whether it is able to measure the intraparenchymal blood flow of an intraabdominal organ is still unknown.(More)
While we know about physicians' involvement in the diagnosis and treatment of prostate cancer, little is known about others who assist men in dealing with the diagnosis and treatment choices, once they are diagnosed with early prostate cancer, but not yet treated. This pilot study explores if men use other sources of support and the roles and functions of(More)
OBJECTIVE This retrospective study evaluated the outcome for a cohort of men undergoing radical retropubic prostatectomy alone as primary treatment for clinical T1-2 prostate adenocarcinoma. METHODS Sixty-two patients treated at Boston University Medical Center between 1987 and 1992 underwent radical prostatectomy alone without adjuvant or neoadjuvant(More)
BACKGROUND The use of therapeutic laparoscopy has become widespread recently. It is important to assess the effects of gaseous and gasless laparoscopy on systemic and renal hemodynamics. STUDY DESIGN A prospective controlled animal study was performed on 40 well-hydrated pigs. Systemic and renal hemodynamics were monitored during peritoneal insufflation,(More)
Testicular tumors in patients who have had the lymphatics disrupted by prior scrotal or inguinal surgery can metastasize primarily to the ipsilateral inguinal nodes in addition to the usual retroperitoneal pattern. Whether routine inguinal node dissection along with retroperitoneal node dissection is warranted in patients with testicular tumors and prior(More)
OBJECTIVES To evaluate the application of virtual reality imaging of the bladder (virtual cystoscopy) in the detection of bladder masses. METHODS Six patients (mean age 61 years, range 43 to 75) with hematuria and positive findings on conventional cystoscopy were studied by means of thin-section helical computed tomography of the air-distended bladder.(More)
PURPOSE We assessed the efficacy of a fluoroscopically controlled cutting balloon catheter for the treatment of ureteropelvic junction and ureteral strictures. MATERIALS AND METHODS A multicenter trial was performed that included 66 endopyelotomies and 49 endoureterotomies. To our knowledge this study represents the largest number of patients with(More)
A 48-year-old lead worker was found to have a cystic renal carcinoma during an evaluation of his occupational lead poisoning. Clinical studies showed elevated blood lead levels, impaired urinary concentrating ability, and reduced creatinine clearance. Histologic and electron microscopic studies showed this cystic tumor to be similar to renal carcinomas(More)