Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Clare E. Close is active.

Publication


Featured researches published by Clare E. Close.


The Journal of Urology | 1990

Cigarettes, Alcohol and Marijuana are Related to Pyospermia in Infertile Men

Clare E. Close; Pacita L. Roberts; Richard E. Berger

The relationship of current use of cigarettes, marijuana and alcohol to the parameters of seminal fluid analysis, sperm penetration assay and sperm autoimmunity was studied in 164 men from infertile couples. Current cigarette smokers, marijuana users and heavy alcohol users showed greater numbers of leukocytes in the seminal fluid than did nonusers (p less than 0.02, less than 0.007 and less than 0.01, respectively). In addition, cigarette smokers had lower sperm penetration assay scores than nonsmokers (median 2.5 versus 8.0, p = 0.05). Users of cigarettes, marijuana or alcohol showed no decrease in sperm count, motility or percentage of oval sperm, and no difference in prevalence of antisperm antibodies compared to nonusers. After controlling for past sexually transmitted diseases and multiple substance exposures in a multivariate model, use of cigarettes (p = 0.006), marijuana (p = 0.12) or alcohol (p = 0.098) continued to be associated with a trend toward increased number of seminal fluid leukocytes. Cigarette smoking continued to show a significant decrease in sperm penetration assay score (p = 0.03).


The Journal of Urology | 1997

Lower Urinary Tract Changes After Early Valve Ablation In Neonates and Infants: Is Early Diversion Warranted?

Clare E. Close; Michael C. Carr; Mark V. Burns; Michael E. Mitchell

PURPOSE Severe hydronephrosis, high grade reflux and/or renal insufficiency often leads to proximal urinary tract diversion in male infants with posterior urethral valves. Even with this treatment progressive loss of renal function often occurs. Unfortunately with early diversion the bladder, already damaged by in utero obstruction, is also defunctionalized. Alternative treatment with valve ablation in the newborn period and without diversion may facilitate recovery of normal bladder function. MATERIALS AND METHODS We retrospectively reviewed the records of infants treated for posterior urethral valves before age 1 year at our institution in the last 8 years. Treatment comprised primary valve ablation in 23 patients and urinary diversion in 8. Preoperative and serial postoperative voiding cystourethrograms were scored for degree of trabeculation, bladder neck hypertrophy and prostatic urethral dilatation in all patients undergoing primary valve ablation. Recovery of bladder and renal function after primary valve ablation was compared to that of patients treated with urinary diversion. RESULTS All patients treated with primary valve ablation demonstrated marked improvement or resolution of bladder abnormalities on voiding cystourethrography by 1 year postoperatively. Bladder compliance and volume were statistically better than in patients treated with primary diversion. Upper tract diversion failed to halt progressive renal failure in 5 of the 6 patients who underwent diversion. Similarly primary valve ablation did not stop progressive renal failure in a matched group of patients. CONCLUSIONS Early ablation of posterior urethral valves results in the recovery of normal bladder appearance and function when performed in the first months of life. Severe renal insufficiency tends to progress even with upper tract diversion. Furthermore, this treatment prevents normal bladder cycling, which may inhibit bladder recovery in the patient with posterior urethral valves.


The Journal of Urology | 1989

Case-Control Study of Men with Suspected Chronic Idiopathic Prostatitis

Richard E. Berger; John N. Krieger; Daniel L. Kessler; Robert C. Ireton; Clare E. Close; King K. Holmes; Pacita L. Roberts

We studied prospectively 50 asymptomatic men (24 men from infertile couples and 26 normal volunteers) with no history of genitourinary infection and 34 men referred for symptoms of chronic prostatitis. Both groups were evaluated by urethral and prostatic secretion cultures for Chlamydia trachomatis, 4-glass prostatic localization cultures for facultative aerobic bacteria (Ureaplasma urealyticum, Mycoplasma hominis and selected fungi) and counts of prostatic fluid leukocytes. The men with symptoms of prostatitis had more than 1,000 leukocytes per mm. in prostatic secretions more often than did controls (11 of 27 versus 0 of 44, p less than 0.001). The concentration of Ureaplasma urealyticum in prostatic secretions was 1 log higher in prostatic fluid localization cultures than in first voided urine in 0 of 30 patients versus 13 of 50 controls (p equals 0.0014). Chlamydia trachomatis was not isolated from any patient or control. No other significant differences were found between patients and controls. We did not identify an infectious cause of chronic nonbacterial prostatitis.


Fertility and Sterility | 1987

The relationship of infection with Chlamydia trachomatis to the parameters of male fertility and sperm autoimmunity

Clare E. Close; San Pin Wang; Pacita L. Roberts; Richard E. Berger

The relationship of past exposure to C. trachomatis to the parameters of male fertility was examined in men from infertile couples whose wives had no known female fertility factors. In this population, the frequency of C. trachomatis antibody was low. Past infection with C. trachomatis was associated with a history of nonspecific urethritis, and with the presence of sperm agglutinating antibodies in serum. We found no difference in the seminal fluid analyses, physical examinations, or sperm penetration assays of the men with or without chlamydial antibody.


The Journal of Urology | 1953

Interstitial Cystitis in Children

Clare E. Close; Michael C. Carr; Mark W. Burns; Jane L. Miller; Tamara Bavendam; Michael E. Mayo; Michael E. Mitchell

PURPOSE Interstitial cystitis has been rarely reported in children. We present our experience with 16 children in whom clinical symptomatology and cystoscopic findings were consistent with the diagnosis of interstitial cystitis. MATERIALS AND METHODS We retrospectively reviewed the charts of 20 children referred for chronic sensory urgency, frequency and bladder pain who underwent cystoscopy and hydrodistension. Four patients were excluded from study because of infection identified at cystoscopy or lack of cystoscopic changes with hydro-distension. RESULTS Patient age at onset of first symptoms ranged from 2 to 11 years (median 4.5) and age at diagnosis ranged from 3 to 16 years (mean 8.2). Of the 16 children 14 (88%) presented with symptoms of urinary frequency and sensory urgency, and in 13 (81%) lower abdominal pain was relieved by voiding. None of the children had motor urgency. Urodynamic evaluation in 8 cases revealed early bladder sensation with no evidence of involuntary bladder contractions. Diffuse glomerulations and terminal hematuria were demonstrated in all patients after hydro-distension. Followup was available for 14 patients. Relief of symptoms occurred after hydro-distension in all children except 1. Seven children (50%) required repeat hydro-distension. CONCLUSIONS Children with symptoms of bladder pain, urinary frequency and sensory urgency have bladder changes on cystoscopy consistent with interstitial cystitis. Although rare, this condition is recognizable and it should not be confused with dysfunctional voiding in which complaints are secondary to involuntary bladder contractions.


The Journal of Urology | 2003

Flow Cytometry Analysis of Proliferative Lesions at the Gastrocystoplasty Anastomosis

Clare E. Close; Serdar Tekgul; George S. Ganesan; Lawrence D. True; Michael E. Mitchell

PURPOSE Proliferative epithelial metaplasia that develops in the anastomotic line after gastrocystoplasty has unknown malignant potential. Flow cytometry analysis of cell cycle profiles is used to predict the neoplastic progression of metaplastic lesions in other proliferative epithelium. We used this technique to evaluate transitional cell metaplasia in rat gastrocystoplasty specimens. MATERIALS AND METHODS A total of 50 prepubescent female Long-Evans rats were randomly assigned to an experimental group (gastrocystoplasty) or a control group (sham operation). At 21 to 27 months (mean 24.9) after operation 12 rats per group survived to sacrifice. Metaplastic lesions were microdissected to yield a minimum of 10(4) cells for DNA flow cytometry and cell cycle analysis. Transitional cell epithelium from sham specimens and gastric epithelium from experimental animals served as controls. RESULTS Transitional cell hyperplasia and metaplasia with cyst formation were found in the anastomotic line in all 12 augmented bladders (100%). No proliferative lesions developed in control animals. No nuclear pleomorphism or mitotic changes were identified on routine histological examination. The epithelial cell turnover rate was 10 times higher in the gastrocystoplasty junctional zone than in control bladders (mean 2.2% versus 0.1% S phase) but lower than in native stomach epithelium (mean 3.3% S phase). Of 12 experimental specimens 1 showed near diploid DNA aneuploidy. No DNA abnormalities were detected in control bladder or stomach specimens. CONCLUSIONS In this animal model histologically benign appearing proliferative lesions that develop in the anastomotic zone after long-term gastrocystoplasty harbor cell cycle and DNA ploidy abnormalities.


BJUI | 2001

Autoaugmentation peritoneocystoplasty in a sheep model.

Clare E. Close; P. A. Dewan; P.J. Ashwood; R.J. Byard; Michael E. Mitchell

Objective To report our experience with autoaugmentation peritoneocystoplasty (AAPC) in a sheep model, and to compare the results with autoaugmentation gastrocystoplasty (AAGC) in a sheep model and in paediatric patients.


BJUI | 2004

Autoaugmentation gastrocystoplasty: further studies of the sheep model

Clare E. Close; Paul Anderson; Glenn A. Edwards; Michael E. Mitchell; P. A. Dewan

To report our experience with autoaugmentation gastrocystoplasty (AAGC, reported to result in an inconsistent augmentation effect in children) in a sheep model, specifically addressing issues of surgical techniques and postoperative bladder drainage that may affect the augmentation result, as many factors have been implicated in the poor outcome.


The Journal of Urology | 1997

Continent gastric tube: New techniques and long-term followup

Clare E. Close; Michael E. Mitchell

PURPOSE The successful use of stomach for bladder augmentation and substitution is well documented. Gastric tissue has been used more recently to create continent catheterizable tubes. We describe 2 new techniques of gastric tube construction, and report our long-term followup of catheterizable gastric tubes in children and adults undergoing complex urinary tract reconstruction. MATERIALS AND METHODS A retrospective chart review of 6 male and 4 female patients 5 to 43 years old was done. Primary diagnoses included bladder exstrophy, cloacal exstrophy, rhabdomyosarcoma and neurogenic bladder. Five patients underwent gastrocystoplasty with simultaneous creation of a continent gastric tube from the anterior gastric flap. In 2 patients who had undergone previous gastrocystoplasty a continent gastric tube was created from an anterior flap raised from the existing gastric bladder. Isolated gastric tubes were constructed in 3 patients. RESULTS Followup ranged from 2 to 9 years (median 3.5). All patients demonstrated easy reliable catheterization. One patient required revision of the proximal end of the tube for incontinence. At followup all tubes were continent. Complications occurred only in flush or protuberant stomas, and resolved after stomal revision with recessed skin flaps. CONCLUSIONS Several techniques can be used to create a continent gastric tube. Long-term followup reveals reliable catheterization and good continence rates. Recession of the gastric tube stoma with a skin flap prevents peristomal complications.


Seminars in Pediatric Surgery | 1996

Early primary valve ablation for posterior urethral valves.

Michael E. Mitchell; Clare E. Close

Collaboration


Dive into the Clare E. Close's collaboration.

Top Co-Authors

Avatar

Michael E. Mitchell

Children's Hospital of Wisconsin

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Michael C. Carr

Children's Hospital of Philadelphia

View shared research outputs
Top Co-Authors

Avatar

San Pin Wang

University of Washington

View shared research outputs
Top Co-Authors

Avatar

P. A. Dewan

Royal Children's Hospital

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

David E. Rapp

Argonne National Laboratory

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Jane L. Miller

University of Washington

View shared research outputs
Researchain Logo
Decentralizing Knowledge