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Dive into the research topics where Byron Alex is active.

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Featured researches published by Byron Alex.


The Journal of Sexual Medicine | 2011

Erectile Dysfunction after Plaque Incision and Grafting: Short‐term Assessment of Incidence and Predictors

Stefan Flores; Judy M. Choi; Byron Alex; John P. Mulhall

INTRODUCTION Plaque incision and grafting (PIG) surgery for Peyronies disease (PD) is a recognized management strategy. One of the recognized complications of PIG surgery is the development of postoperative erectile dysfunction (ED). AIM To determine the incidence of ED after PIG surgery and attempt to define predictors of ED development. METHODS All patients underwent preoperative cavernosometry. Grafting was performed with either cadaveric pericardium (Tutoplast) or intestinal submucosa (Surgisis). Prior to 2006, the procedure used an H-type incision, whereas after this date, the Egydio approach has been used. MAIN OUTCOME MEASURES Men undergoing PIG completed preoperative and 6-month postoperative International Index of Erectile Function (IIEF) questionnaires. RESULTS 56 patients were analyzed. Mean patient and partner ages were 57 ± 22 and 54 ± 18 years, respectively. Mean duration of PD at the time of PIG was 22 ± 9 months. Seventy-five percent had curvature alone, 11% had hourglass/indentation deformity, and the remainder had combined curvature/indentation. Mean preoperative curvature was 52 ± 23°. Fifty-two had grafting with Tutoplast, while four had grafting with Surgisis. All men at baseline were capable of generating a penetration rigidity erection. Preoperatively, 50% of men had cavernosal insufficiency and 21% had venous leak (baseline and postoperative erectile function [EF] domain scores were 23 ± 4 and 17 ± 9, respectively [P < 0.01]). Forty-six percent of men experienced a ≥6-point decrease in EF domain score after PIG. The predictors of a ≥6-point reduction in IIEF-EF domain score on multivariable analysis were degree of preoperative curvature, type of plaque incision, patient age, and baseline venous leak. Conclusions.  Almost one-half of men had significant reduction in their erectile rigidity after PIG. Reduction was predicted by larger baseline curvature, the Egydio plaque incision technique, older patient age, and the presence of venous leak at baseline. Based on these data, we discourage older men, those with venous leak, and those with profound curvature from considering PIG surgery.


BJUI | 2011

Defining predictors of response to intralesional verapamil injection therapy for Peyronie’s disease

Daniel J. Moskovic; Byron Alex; Judy M. Choi; Christian J. Nelson; John P. Mulhall

Study Type – Therapy (case series)


The Journal of Sexual Medicine | 2010

Predicting Delay in Presentation in Men with Peyronie's Disease

John P. Mulhall; Byron Alex; Judy M. Choi

INTRODUCTION Many men with Peyronies disease (PD) delay presentation to a urologist. The reasons for this are unclear. AIM To define the differences in men who present early compared to those presenting in a delayed fashion and to determine predictors of delayed presentation. METHODS A retrospective analysis of all patients presenting for the first medical evaluation of PD. All patients underwent a standard history and physical examination and had a standardized deformity assessment. Demographic and PD parameters were recorded. MAIN OUTCOME MEASURES Statistical comparison was used to define factors that were different between early and delayed presenters and multivariable analysis was used to define predictors of presentation >12 months. RESULTS 482 patients were analyzed, 61% presenting ≤12 months, 39% >12 months. Mean patient age was 52 ± 13 years and mean duration of PD was 17 ± 30 months. Mean measured curvature was 42° ± 19°. Multivariable analysis revealed that delayed presentation patients were significantly more likely to be older (odds ratio [OR] = 4.0), to be in long-term relationships (OR = 3.6), to have dorsal curvature (OR = 2.5), to have curvature <45° (OR = 3.3), to be heterosexual (OR = 2.0), and to have simple deformity (OR = 1.5). CONCLUSIONS One-third of men with PD presented in a delayed fashion and they tended to be older, to be in long-term relationships, to have dorsal curvature, or to have simple deformity.


Journal of Child Neurology | 2017

Increasing Ketamine Use for Refractory Status Epilepticus in US Pediatric Hospitals

Sotirios Keros; Ersida Buraniqi; Byron Alex; Annalee Antonetty; Hugo Fialho; Baria Hafeez; Michele Jackson; Rachel Jawahar; Stephanie Kjelleren; Elizabeth Stewart; Lindsey A. Morgan; Mark S. Wainwright; Yoshimi Sogawa; Anup D. Patel; Tobias Loddenkemper; Zachary M. Grinspan

Ketamine is an emerging therapy for pediatric refractory status epilepticus. The circumstances of its use, however, are understudied. The authors described pediatric refractory status epilepticus treated with ketamine from 2010 to 2014 at 45 centers using the Pediatric Hospital Inpatient System database. For comparison, they described children treated with pentobarbital. The authors estimated that 48 children received ketamine and pentobarbital for refractory status epilepticus, and 630 pentobarbital without ketamine. Those receiving only pentobarbital were median age 3 [interquartile range 0-10], and spent 30 [18-52] days in-hospital, including 17 [9-28] intensive care unit (ICU) days; 17% died. Median cost was


The Journal of Urology | 2008

ERECTILE DYSFUNCTION AFTER PLAQUE INCISION AND GRAFTING: INCIDENCE AND PREDICTORS

Judy M. Choi; Byron Alex; John P. Mulhall

148 000 [81 000-241 000]. The pentobarbital-ketamine group was older (7 [2-11]) with longer hospital stays (51 [30-93]) and more ICU days (29 [20-56]); 29% died. Median cost was


The Journal of Urology | 2009

AN ANALYSIS OF EXPECTATIONS OF PATIENTS REGARDING SEXUAL FUNCTION FOLLOWING RADICAL PROSTATECTOMY

Serkan Deveci; Byron Alex; Keith O'Brien; John P. Mulhall

298 000 [176 000-607 000]. For 71%, ketamine was given ≥1 day after pentobarbital. Ketamine cases per half-year increased from 2 to 9 (P < .05). Ketamine is increasingly used for severe pediatric refractory status epilepticus, typically after pentobarbital. Research on its effectiveness is indicated.


The Journal of Urology | 2015

PD40-02 PREDICTING ERECTILE DYSFUNCTION (ED) AFTER DORSAL PLAQUE INCISION AND GRAFTING IN MEN WITH BASELINE NORMAL ERECTILE HEMODYNAMICS

Raanan Tal; Judy M. Choi; Byron Alex; Stefan Flores; Christian J. Nelson; John P. Mulhall


The Journal of Urology | 2013

1240 ACUTE ON CHRONIC PEYRONIE'S DISEASE: PATIENT PROFILES AND PREDICTORS

Patrick Teloken; Boback Berookhim; Judy M. Choi; Byron Alex; Campbell Bryson; Asha Jamzadeh; John P. Mulhall


The Journal of Urology | 2012

1694 PREDICTORS OF DEFORMITY STABILIZATION AND IMPROVEMENT IN MEN WITH PEYRONIE'S DISEASE

Judy M. Choi; Byron Alex; John P. Mulhall


The Journal of Urology | 2010

1069 PEYRONIE'S DISEASE IN TEENAGERS

Raanan Tal; Byron Alex; Judy M. Choi; John P. Mulhall

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John P. Mulhall

Memorial Sloan Kettering Cancer Center

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Christian J. Nelson

Memorial Sloan Kettering Cancer Center

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Raanan Tal

Memorial Sloan Kettering Cancer Center

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Anup D. Patel

Nationwide Children's Hospital

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Boback Berookhim

University Hospitals of Cleveland

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