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    • John W Jr Duckett
    • John W Jr Duckett: Influence Statistics

      John W Jr Duckett

      John W Jr Duckett

      Division of Pediatric Urology The Children's Hospital of Philadelphia 34th Street and Civic Center Boulevard Philadelphia, Pennsylvania 19104, USA | Division of Pediatric ...

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      John W Jr Duckett:Expert Impact

      Concepts for whichJohn W Jr Ducketthas direct influence:Posterior urethral valves,Passive compliance,Absent testis,Ureteropelvic junction,Lamina propria,Hypospadias repair,Vesicoureteral reflux,Urinary bladder.

      John W Jr Duckett:KOL impact

      Concepts related to the work of other authors for whichfor which John W Jr Duckett has influence:Posterior urethral valves,Hypospadias repair,Vesicoureteral reflux,Urinary bladder,Renal function,Conjoined twins,Urethral stricture.

      KOL Resume for John W Jr Duckett

      Year
      2002

      Division of Pediatric Urology The Children's Hospital of Philadelphia 34th Street and Civic Center Boulevard Philadelphia, Pennsylvania 19104, USA

      2000

      From the Division of Urology, Children’s Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania

      1998

      From the Division of Pediatric Urology, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania. Accepted for publication September 19, 1997. (Duckett) Deceased.

      1997

      From the Division of Urology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania. (Rohrmann) Current address: Klinikom der RWTH Aachen, Urologische Klinik, Pauwels strasse 30, 52057, Aachen, Germany.

      The Children's Hospital of Philadelphia, Philadelphia, USA

      Children's Hospital of Philadelphia and Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania

      Accepted for publication May 9, 1997.

      (Baskin) Requests for reprints: Department of Urology, U-575, University of California, San Francisco, California 94143-0738.

      1996

      From the Division of Urology, Children's Hospital of Philadelphia and Division of Maternal-Fetal Medicine, Pennsylvania Hospital, Philadelphia, Pennsylvania.

      Division of Urology, Children's Hospital of Philadelphia, Philadelphia, Pennyslvania, and Clinica di Chirurgia Pediatrica, Universita' degli Studi ed IRCCS Policlinico S. Matteo, Pavia, Italy.

      Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA

      1995

      From the Division of Urology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, Division of Urology, St. Louis Children's Hospital, St. Louis, Missouri, Department of Renal Urology, Children's Medical Center, Dallas, Texas, and Department of Urology, University of California at San Francisco, Children's Medical Center, San Francisco, California.

      Children's Hospital of Philadelphia, USA

      1994

      From the Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania

      Children’s Hospital of Philadelphia and The Connective Tissue Research Institute, Philadelphia, PA

      1993

      Children's Hospital of Philadelphia, 34th Street and Civic Center Boulevard, 19104-4399, Philadelphia, PA, USA

      From the Department of Pediatric Urology, Children ’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania

      Department of Urology, San Francisco General Hospital, University of California, San Francisco, California

      1992

      J. Hillis Miller Health Care Center, Gainesville, Florida

      Department of Pediatric Nephrology, West Chester Medical Center, Valhalla, New York

      Privatdozent, Oberartz, Kinderspital, Basel, Switzerland

      Children's Hospital of Philadelphia, Philadelphia, PA, USA

      From the Divisions of Urology and Ultrasound, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania

      1991

      Urology Research Laboratories, Division of Urology, Hospital of the University of Pennsylvania, Division of Pediatric Urology at the Children’s Hospital of Philadelphia and University of Pennsylvania School of Medicine, Philadelphia, Pa., USA

      1990

      Division of Urology, Children’s Hospital of Philadelphia, Hospital of the University of Pennsylvania, and the University of Pennsylvania School of Medicine, Philadelphia, Pa., USA

      1989

      From the Department of Surgery, Division of Urology, The Children’s Hospital of Philadelphia, and University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania

      Kinderspital, Basel, Switzerland

      1988

      From the Divisions of Urology and Ultrasound, Childrens Hospital of Philadelphia, Philadelphia, Pennsylvania

      1987

      Children's Hospital of Philadelphia, 19104, Philadelphia, PA, USA

      Department of Surgery, Division of Urology and Department of Hematology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania

      From the University Children’s Hospital and University Computer Center, Basel, Switzerland

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      Sample of concepts for which John W Jr Duckett is among the top experts in the world.
      Concept World rank
      postoperative complications calculi #1
      2 sets genitalia #1
      enterocystoplasty calculi #1
      60 new patients #1
      improvement meatal cosmetic #1
      variant hypospadias #1
      valve guerin #1
      bladders stiff #1
      reconstruction distal hypospadias #1
      cryptorchidism theory #1
      small hydronephrosis 3 #1
      grouped analysis increase #1
      apparent ureteropelvic #1
      magpi meatoplasty #1
      creatinine compensatory hypertrophy #1
      urinary tract preservation #1
      antisera leading #1
      mid hypospadias #1
      ventral meatal wall #1
      experience 1111 cases #1
      neurogenic noncompliant bladders #1
      retroperitoneal mobilization #1
      ultrasound excision #1
      hypospadias meatoplasty #1
      diagnosis excision #1
      kidney growth renotropin #1
      intravesical morphine #1
      11 41 percent #1
      vaginal ureteral #1
      ureter connection #1
      bladder wall loss #1
      infection priapism #1
      single ureteroceles #1
      primary endoscopic incision #1
      hypospadias follow #1
      lts skin #1
      frequently ectopic #1
      anomalies 6 #1
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      Prominent publications by John W Jr Duckett

      KOL-Index: 12602

      PURPOSE: The management of the nonpalpable testis permits an individualized operative approach. We analyze the results of surgical management of a large series of patients with a nonpalpable testis.

      MATERIALS AND METHODS: Between January 1986 and June 1994 we treated 1,866 boys with undescended testes. There were 447 testes (24%) that were not palpable at presentation. Intra-operative data on these patients were collected for age at presentation, bilateral testes position, testicular ...

      Known for Nonpalpable Testis | Surgical Management | Undescended Testes | Spermatic Vessels | Intra Abdominal
      KOL-Index: 11406

      OBJECTIVES: Laser tissue soldering (LTS) with the diode laser and human albumin-hyaluronate-indocyanine green solder is a safe and effective method of providing an immediate leak-free closure during hypospadias repair. In this report, we compare the physiology, histology, and immunohistochemistry of wound healing following LTS and suturing in a rat skin flap model.

      METHODS: A 4 x 5-cm skin flap was raised and bisected (4 cm) on the dorsum of 48 Sprague-Dawley rats. The central wound was ...

      Known for Hypospadias Repair | Wound Healing | Tensile Strength Lts | Skin Flap | Laser Soldering
      KOL-Index: 9836

      Immunohistochemistry using monoclonal and polyclonal antibodies to extracellular matrix proteins is a highly sensitive tool for the characterization of matrix components. For the first time in the normal and noncompliant human bladder we have used antibodies to collagen types I, III and IV, and elastin to provide morphological correlation with mechanical properties noted clinically. In the normal bladder elastin and collagen types I and III showed intense localization in the lamina ...

      Known for Lamina Propria | Normal Bladder | Smooth Muscle | Detrusor Layer | Collagen Types Iii
      KOL-Index: 9299

      PURPOSE: We believe that primary valve ablation with observation is the preferred management for posterior urethral valves. However, debate continues as to the role of high diversion. We examined the long-term outcome of a large series of patients treated with primary valve ablation, and compared it to the outcome of high diversion and vesicostomy.

      MATERIALS AND METHODS: We reviewed the records of 100 patients treated with primary valve ablation (74%), vesicostomy (13%) or high diversion ...

      Known for Primary Valve | Patients Age | Term Outcome | Urinary Diversion | Newborn Kidney Failure
      KOL-Index: 9084

      Patients with posterior urethral valves may present with or contract renal insufficiency. High intravesical pressure that is transmitted to the upper urinary tract in utero is a likely contributing cause. We have identified 3 anatomical associations with posterior urethral valves that provide a pressure "pop-off" mechanism resulting in preservation of better renal function: 1) the syndrome of posterior urethral valves, unilateral vesicoureteral reflux and renal dysplasia; 2) large ...

      Known for Posterior Urethral Valves | Serum Creatinine | Protective Factors | Renal Function | Unilateral Vesicoureteral Reflux
      KOL-Index: 8847

      The onlay island flap urethroplasty, a variant of the transverse preputial (tubularized) island flap, was originally described for repair of anterior hypospadias. However, many cases of mid and proximal hypospadias have a well developed urethral plate and exhibit little or no chordee after release of skin tethering. Patients with this combination of findings are ideal candidates for onlay island flap urethroplasty regardless of initial meatal position. During the last 5 years the onlay ...

      Known for Onlay Island Flap | Urethral Plate | Hypospadias Repair | Fewer Complications | Urethra Humans
      KOL-Index: 8745

      The contractile response of the rabbit urinary bladder to field stimulation consists of both cholinergic and purinergic components. In general, approximately 60% of the contractile response to field stimulation is cholinergic and 40% is purinergic. Although the purinergic response represents a significant proportion of the initial (phasic) pressure response to field stimulation of the isolated whole bladder, it contributes only 10-15% of the ability of field stimulation to empty the ...

      Known for Urinary Bladder | Muscarinic Receptor Density | Contractile Response | Field Stimulation | Pregnant Rabbits
      KOL-Index: 8253

      A total of 51 children, mostly less than 2 years old, underwent endoscopic incision of ureteroceles as a primary form of treatment. In 73% no further surgery was required. Of the patients 19 were diagnosed by prenatal ultrasound, with a urinary tract infection the usual presenting symptom in the remainder. Of 27 intravesical cases endoscopic incision resulted in decompression of the ureterocele in 93%, with preservation of upper pole function in 96%, and secondary surgical procedures ...

      Known for Endoscopic Incision | Ectopic Ureteroceles | Intravesical Versus | Surgery Patients | Prenatal Ultrasound
      KOL-Index: 8252

      Abstract Purpose The management of the nonpalpable testis permits an individualized operative approach. We analyze the results of surgical management of a large series of patients with a nonpalpable testis. Materials and Methods Between January 1986 and June 1994 we treated 1,866 boys with undescended testes. There were 447 testes (24%) that were not palpable at presentation. Intraoperative data on these patients were collected for age at presentation, bilateral testes position, ...

      Known for Nonpalpable Testis | Surgical Management | Impalpable Testes | Spermatic Vessels | Inguinal Approach
      KOL-Index: 8167

      Of 260 patients being actively followed in a myelodysplasia clinic 48 have had a vesicostomy. Vesicostomy was done because of hydroureteronephrosis in 44 cases, infection in 3 and failure of clean intermittent catheterization in 1. Of the 48 patients 16 underwent closure of the vesicostomy, generally between ages 6 and 10 years, an age when the child is prepared to begin clean intermittent catheterization and is motivated to achieve continence. Two children underwent early vesicostomy ...

      Known for Spina Bifida | Neurogenic Bladder | Urinary Catheterization | Clean Intermittent | Publication Child Child
      KOL-Index: 8125

      The coexistence of ureteropelvic junction obstruction and vesicoureteral reflux was seen in 17 (14 per cent) of 147 consecutive patients undergoing pyeloplasty. These patients were analyzed to determine the therapeutic implications of this association. They fell into 3 clinical groups: group 1--primary ureteropelvic junction obstruction, group 2--ureteropelvic junction obstruction secondary to high grade reflux and group 3--pseudo-ureteropelvic junction obstruction. There were 11 ...

      Known for Ureteropelvic Junction | Vesicoureteral Reflux | Voiding Cystourethrogram | Pyeloplasty Patients | Ureteral Obstruction
      KOL-Index: 7761

      Infants with posterior urethral valves and persistent unilateral reflux after valve resection often have an associated nonfunctioning, dysplastic kidney. Spurious function of the unit with reflux may be apparent on the delayed films of the excretory urogram. Misinterpretation of the initial radiographic studies performed without coincident bladder drainage results in the missed diagnosis of this syndrome and misguided surgical management. Of 82 patients with urethral valves 17 (21 per ...

      Known for Renal Dysplasia | Urethral Valves | Unilateral Reflux | Surgical Management | Voiding Dynamics
      KOL-Index: 7715

      PURPOSE: While it may lack the classic morphological pattern in striated muscle systems, there is ample evidence that smooth muscle also contains sarcoplasmic reticulum. These intracellular storage sites release calcium into the cytosol to generate contractile force in response to various stimuli. A major component of the sarcoplasmic reticulum is an adenosine triphosphate dependent ion pump, which serves to drive free calcium out of the cytosol back into this intracellular reservoir. ...

      Known for Sarcoplasmic Reticulum | Outlet Obstruction | Decompensated Detrusor | Smooth Muscle | Intracellular Calcium
      KOL-Index: 7590

      Although numerous experimental studies have addressed urinary bladder innervation, physiology and pharmacology, little information is available concerning the ontogeny of bladder function. The present study describes the developmental aspects of bladder mass, bladder capacity, pressure development and emptying in white New Zealand rabbits one day of age through maturity (11 to 15 weeks of age). The following studies were performed: Cystometry, pressure generation, rate of pressure ...

      Known for Bladder Function | Field Stimulation | Pressure Generation | Numerous Experimental Studies | Rabbits Urinary
      KOL-Index: 7308

      Classic management of cloacal exstrophy has emphasized primary closure of the omphalocele, end ileostomy, and delayed genitourinary reconstruction. The resultant mortality from “short-bowel syndrome” and urinary sepsis, and morbidity from inappropriate gender assignment has prompted us to reexamine the operative approach to this problem. Our experience involves 15 cases from 2 days to 21 years after repair. All had initial closure of their omphalocele. Nine of the 15 had closure of the ...

      Known for Cloacal Exstrophy | Bladder Closure | Newborn Period | Genitourinary Reconstruction | Ileostomy Infant

      Key People For Posterior Urethral Valves

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      Division of Pediatric Urology The Children's Hospital of Philadelphia 34th Street and Civic Center Boulevard Philadelphia, Pennsylvania 19104, USA | Division of Pediatric Urology The Children’s Hospital of Philadelphia 34th Street and Civic Center Bo

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