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Dive into the research topics where James Rybak is active.

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Featured researches published by James Rybak.


The Journal of Sexual Medicine | 2011

Traction therapy for men with shortened penis prior to penile prosthesis implantation: a pilot study.

Laurence A. Levine; James Rybak

INTRODUCTION Loss of penile length after penile prosthesis implantation is one of the most common complaints. There is no recognized reliable technique to gain length once the device is placed. AIMS This noncontrolled pilot study was designed to evaluate the efficacy and safety of external penile traction therapy in men with a shortened penis used before inflatable prosthesis implantation. METHODS Ten men with drug refractory erectile dysfunction and a complaint of a shorter penis as a result of radical prostatectomy in four, prior prosthesis explantation in four, and Peyronies disease in two were entered into this trial. External penile traction was applied for 2-4 hours daily for 2-4 months prior to prosthesis surgery. MAIN OUTCOME MEASURES Baseline stretched penile length (SPL) was compared with post-traction SPL and postimplant inflated erect length. A non-validated questionnaire assessed patient satisfaction. RESULTS All men completed the protocol. Daily average device use was 2-4 hours and for up to 4 months. No man had measured or perceived length loss after inflatable penile prosthesis placement. Seventy percent had measured erect length gain compared with baseline pre-traction SPL up to 1.5 cm. There were no adverse events. CONCLUSION External traction therapy appears to result in a preservation of penile length, as no man had measured or perceived length loss following prosthesis placement, but in fact, a small length gain was noted in 70% of the subjects with no adverse events. The protocol is tedious and requires compliance to be effective. External traction therapy prior to inflatable penile prosthesis placement appears to preserve and possibly result in increased post-prosthesis implant erect length.


The Journal of Sexual Medicine | 2012

A Retrospective Comparative Study of Traction Therapy vs. No Traction Following Tunica Albuginea Plication or Partial Excision and Grafting for Peyronie's Disease: Measured Lengths and Patient Perceptions

James Rybak; Dimitri Papagiannopoulos; Laurence A. Levine

INTRODUCTION Loss of penile length is a recognized and common consequence of Peyronies disease (PD). Traction therapy (TT+) has been reported to decrease post-op length loss as well as increase stretched penile length (SPL) prior to surgery. AIM The aim of this study was to study patient outcomes with penile length change and patient satisfaction after surgery following tunica albuginea plication (TAP) and partial plaque excision and grafting (PEG) with or without postoperative TT. METHODS Retrospective analysis was performed from our cohort of Peyronies reconstructive surgery between 2007 and 2010. SPL was measured dorsally from pubis to corona and recorded at the initial office visit and then compared to most recent postoperative visit. Patients were then stratified by procedure and whether TT was used (TT+ and TT-; TAP N = 52 [27 TT+ and 25 TT-] and PEG N = 59 [36 TT+ and 23 TT-). Traction therapy was initiated for >2 hours a day for 3 months typically starting 3-4 weeks postoperatively. A non-validated mailed questionnaire assessed patient perceptions. RESULTS Mean length change seen in TAP (TT+) was 0.85 cm (0.25-1.75) vs. -0.53 cm (-1.75 to 0.5) in TAP (TT-) (P < 0.001). The mean length change seen in PEG (TT+) was 1.48 cm (0-6) vs. PEG (TT-) 0.24 cm (-1 to 2.5 cm) (P < 0.001). Sixty-one percent of surveys were returned; 85% lost length prior to the initial office evaluation, with an average of -2.5 cm lost. Importantly, in those who used traction, there was no perceived length loss, 58% reported a mean erect length gain of 1.1 cm. However, only 54% of all patients were satisfied with their current erect length. CONCLUSIONS Loss of length in men with PD remains a serious concern. It appears that postoperative TT can result in length preservation, and in many, a measured and perceived length gain following correction of the curvature.


The Journal of Sexual Medicine | 2013

Peyronie's Disease Plaque Calcification—Prevalence, Time to Identification, and Development of a New Grading Classification

Laurence A. Levine; James Rybak; Christopher Corder; Michael Ryan Farrel

INTRODUCTION Peyronies disease (PD) is a connective tissue disorder of the penis in which a fibrous scar in the tunica albuginea can result in multiple penile deformities. AIM The study aims to investigate the prevalence and time to identification of plaque calcification (PC) in our PD patient population and whether stratification of calcification based on severity seen on ultrasound would serve as a predictor of treatment progression to surgery. METHODS A retrospective review of 1,041 men presenting with PD from 1993 to 2009 was performed. Eight hundred thirty-four underwent penile duplex ultrasound. MAIN OUTCOME MEASURES PC was graded as: grade 1 (<0.3 cm), grade 2 (>0.3 cm, <1.5 cm), grade 3 (>1.5 cm; or ≥ 2 plaques >1.0 cm). A matched control group with noncalcified plaques (n = 236) was selected for comparison. RESULTS Two hundred eighty-four men (34%) were found to have PC noted on ultrasound, and 98 had fully documented dimensions of the PC. Forty-one percent were found to have grade 1, 28% grade 2, and 32% grade 3. When analyzed by grade and progression to surgery, 23% of grade 1, 32% of grade 2, and 55% of grade 3 patients had surgery. Those with grade 3 PC were more likely to undergo surgical intervention for PD (OR 2.28 95% CI 1.07-4.86) and more likely to undergo a grafting procedure than control patients (P < 0.0001). CONCLUSIONS Men with PC are not more likely to undergo surgery than those without PC (OR 0.95, 95% CI 0.58-1.57). PC is not uncommon, as it was found in 34% of our cohort. PC does not appear to be an indication of mature or stable disease, as it was identified by ultrasound in 37% of patients less than 12 months after onset of symptoms. Men with grade 3 PC have an increased likelihood of progression to surgical intervention and a higher likelihood of undergoing a grafting procedure.


The Journal of Sexual Medicine | 2014

Single Center Outcomes after Reconstructive Surgical Correction of Adult Acquired Buried Penis: Measurements of Erectile Function, Depression, and Quality of Life

James Rybak; Stephen Larsen; Michelle Yu; Laurence A. Levine

INTRODUCTION Management of adult acquired buried penis is a troublesome situation for both patient and surgeon. The buried penis has been associated with significant erectile and voiding dysfunction, depression, and overall poor quality of life (QOL). AIM To identify outcomes following reconstructive surgery with release of buried penis, escutcheonectomy, and circumcision with or without skin grafting. METHODS We retrospectively identified 11 patients treated by a single surgeon between 2007 and 2011, patient ages were 44-69; complete data review was available on all 11. OUTCOME MEASURES Validated European Organisation for Research and Treatment of Cancer 15 QOL, Center for Epidemiologic Studies Depression Scale (CES-D), and International Index of Erectile Function (IIEF) surveys assessed patient QOL, depression, and erectile function pre- and postoperatively. RESULTS Mean body mass index (BMI) was 48.8 (42.4-64.6). Mean operative time was 191 minutes (139-272). Mean length of stay was 2.1 days. Ten of 11 patients required phallic skin grafting. There was one perioperative complication resulting in respiratory failure and overnight stay in the intensive care unit. Wound complications were seen in 2/11 patients, and 1 needed surgical debridement for superficial wound infection. Skin graft take was seen in 100% of the patients. Ninety-one percent of patients noted significant improvement in voiding postoperatively. Ninety-one percent of patients reported significant erectile dysfunction preoperatively. Subsequently, IIEF scores improved post surgery by an average of 7.7 points. Clinical depression was noted to be present in 7/11 patients preoperatively and 2/11 postoperatively based on CES-D surveys. QOL improved significantly in 10/11 compared with preoperative baseline; however, many patients noted significant difficulties based on their weight and other comorbidities. CONCLUSIONS Management of adult acquired buried penis is a challenging, yet correctable problem. In our series it appears that by using established surgical techniques we were able to achieve significant improvements in erectile function, QOL, and measures of depression.


Urology Annals | 2016

Procalcitonin is a strong predictor of urine culture results in patients with obstructing ureteral stones: A prospective, pilot study

Dimitri Papagiannopoulos; Patrick Whelan; Waseem Ahmad; James Rybak; Bala Hota; Leslie A. Deane; Ajay Nehra

Purpose: The appropriate management of infected obstructing ureteral calculi is prompt genitourinary decompression. Urine cultures are the gold standard for confirming infection but often take 24–48 h to result. Although white blood cell (WBC) count is an important diagnostic laboratory test, it is a nonspecific inflammatory marker. Similarly, urinalysis (UA) can be misleading in the setting of a contaminated sample, bladder colonization, or in cases of a completely obstructed the upper urinary tract. Procalcitonin (PCT) has shown promise in predicting the presence and degree of bacterial infections. In this proof-of-concept study, we explore whether PCT is effective at predicting concomitant infections in the setting of obstructing ureteral stones. Materials and Methods: This is a prospective, single-institution observational pilot study examining adult patients who presented to the emergency room with acute obstructing ureterolithiasis. In total, 22 patients were enrolled. At the time of presentation, data obtained were vital signs, WBC count, PCT, UA, urine, and blood cultures. Fisher-exact two-tailed t-tests and receiver operating characteristic statistics with area under the curve (AUC) calculations were used to determine the correlation between urine culture results and PCT, WBC count, nitrite-positive UA, heart rate, and fever. Results: In total, 5/22 patients had bacteria-positive urine cultures. PCT (P = 0.020) and nitrite-positive UA (0.024) were the only statistically significant predictors of urine culture results. In comparing the AUC, PCT (0.812) was strongly correlated with eventual urine culture results. Conclusions: This proof-of-concept pilot study gives encouraging results, in that PCT was a good predictor of positive cultures (P = 0.02, AUC 0.812). Given, the small sample size, one cannot directly compare PCT to other markers of infection. However, PCT shows promise in this arena and warrants future investigation.


The Journal of Urology | 2012

1695 DOES CALCIFICATION OF PEYRONIE'S DISEASE PLAQUE PREDICT PROGRESSION TO SURGICAL INTERVENTION?

James Rybak; Marah Hehemann; Christopher Corder; Laurence A. Levine


The Journal of Urology | 2013

829 ROUTINE EN BLOC STAPLING OF THE RENAL HILUM DURING LAPAROSCOPIC NEPHRECTOMY IS SAFE AND EFFECTIVE

James Rybak; Kalyan C. Latchamsetty; Jerome Hoeksema; Christopher L. Coogan


The Journal of Urology | 2015

MP80-20 PROCALCITONIN SHOWS SUPERIOR SPECIFICITY IN PREDICTING INFECTION IN THE SETTING OF OBSTRUCTIVE URETERAL CALCULI

Dimitri Papagiannopoulos; Patrick Whelan; Waseem Ahmad; James Rybak; Dino Rumoro; Leslie A. Deane; Ajay Nehra


The Journal of Urology | 2013

762 ENDOSCOPIC MANAGEMENT OF RECURRENT POSTERIOR URETHRAL STRICTURES (PUS) WITH VISUAL INTERNAL URETHROTOMY (VIU) AND INJECTION OF MITOMYCIN C (MMC)

James Rybak; Laurence A. Levine


The Journal of Urology | 2012

19 SINGLE CENTER OUTCOMES AFTER RECONSTRUCTIVE SURGICAL CORRECTION OF ADULT –ACQUIRED BURIED PENIS: ASSESSMENT OF QUALITY OF LIFE AND DEPRESSION

James Rybak; Stephen Larsen; Laurence A. Levine

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Laurence A. Levine

Rush University Medical Center

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Ajay Nehra

Rush University Medical Center

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Christopher Corder

Rush University Medical Center

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Leslie A. Deane

Rush University Medical Center

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Patrick Whelan

Rush University Medical Center

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Stephen Larsen

Rush University Medical Center

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Waseem Ahmad

Rush University Medical Center

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Bala Hota

Rush University Medical Center

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Christopher L. Coogan

Rush University Medical Center

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