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Biomedical subjects

D L Myers

Publications and source records attributed to D L Myers.

At least 19 recordsLinked to original sources
PubMed1999

Is urinary incontinence different in women with Parkinson's disease?

The purpose of this study was to determine the risk of detrusor hyperreflexia in women with Parkinson's disease. Fourteen women with Parkinson's disease and urinary complaints were compared with 28 age-matched women who had urinary complaints and no neurologic disease (controls). Demographic data, symptomatology, multichannel urodynamic indices and rates of diagnoses were compared between the two groups using the Mantel-Haenszel matched odds ratio (OR) and the Kruskal-Wallis test. The mean age of the women was 73.3 years. Those with Parkinson's disease had an increased rate of detrusor hyperreflexia (92.8% vs. 50.0%, OR 13, 95% confidence interval 1.6,228, P=0.02) which occurred at lower volumes (150.0 ml vs. 225.0 ml, P=0.01), and a lower maximum cystometric capacity (240.0 ml vs. 335.0 ml, P=0.02) compared to the control group. It was concluded that women with Parkinson's disease and lower urinary tract complaints have a lower maximum cystometric capacity and a higher rate of detrusor hyperreflexia at lower bladder volumes.

Aged↗
PubMed1998

Conservative surgical management of Mersilene mesh suburethral sling erosion.

OBJECTIVE: The aim of this study was to describe conservative surgical management of polyethylene terephthalate (Mersilene, Ethicon, Inc, Somerville, NJ) mesh suburethral sling erosion as an alternative to sling removal. STUDY DESIGN: Seven women who had undergone suburethral sling procedures with Mersilene mesh were found to have varying degrees of mesh visible in the vagina at 4 to 12 weeks after the operation. Three women with erosions <5 mm were treated in the office and 4 women who had 6 to 30 mm erosions underwent inpatient surgical revision, which consisted of trimming of mesh when needed, excision of granulation tissue, and re-covering of the erosion in 2 layers. RESULTS: All 7 patients have been followed up for 6 to 37 months. Only 1 woman who underwent inpatient surgical revision had a recurrence (4 mm); this was treated successfully in the office. CONCLUSION: Vaginal erosions in suburethral sling procedures with Mersilene mesh can be managed initially with our conservative surgical technique.

Aged↗
PubMed1998

The effect of posterior wall support defects on urodynamic indices in stress urinary incontinence.

OBJECTIVE: To determine if posterior vaginal wall defects affect urodynamic indices and mask stress urinary incontinence. METHODS: Ninety women with grade 0, 1, 2, or 3 posterior wall defects were evaluated prospectively by complete urodynamics to assess their urinary complaints. None had severe anterior or apical support defects. Urethral pressure profilometry and cough stress test were performed with the posterior wall in the unretracted position and then with the posterior wall retracted using a split speculum. Analysis of covariance was used to compare adjusted mean differences in maximum urethral closure pressure, functional urethral length, and units of leakage volume during the cough stress test in the unretracted and retracted positions among the posterior wall grade groups. RESULTS: In women with grade 3 posterior wall defects, there were significant changes from the unretracted to the retracted position in maximum urethral closure pressure of -7.0 cm H20, (99% confidence interval [CI] -12.4, -1.6), functional urethral length of -0.3 cm (99% CI -0.5, -0.1), and leak volume units of +0.7 (99% CI 0.4, 1.0) during the cough stress test. There were four women with grade 3 posterior wall defects who demonstrated potential stress incontinence when their posterior wall was retracted. CONCLUSION: A grade 3 posterior wall defect may artificially raise maximum urethral closure pressure, increase functional urethral length, and mask urinary stress incontinence during a cough stress test. Women with grade 3 posterior wall defects should be tested with the posterior wall retracted during urodynamic evaluation.

Aged↗
PubMed1998

Double pessary use in grade 4 uterine and vaginal prolapse.

BACKGROUND: Certain situations dictate conservative management of grade 4 uterine or vaginal vault prolapse in women. The reduction of a prolapse may not be possible if the vagina cannot retain a single pessary. We have used double pessaries in the management of this condition. TECHNIQUE: With the patient in the dorsal lithotomy position, either a Donut or Inflatoball (Milex Products Inc., Chicago, IL) pessary is inserted and pushed into the vagina as far as is comfortable. A second pessary, either a flexible Gellhorn or Shaatz (Milex Products Inc.), then is placed caudad to the first. EXPERIENCE: We have used this approach in five women who have been followed for 7-15 months. There have been no erosions or vaginitis and all the women experienced symptomatic relief. CONCLUSION: In women who want or require conservative management of grade 4 prolapse and are unable to retain a single pessary, the placement of two pessaries often will be successful.

Aged↗
PubMed1997

Distemper: not a new disease in lions and tigers.

In light of recent canine distemper virus (CDV) epidemics, we set out to determine the historical significance of CDV infection in captive lions and tigers in Switzerland. The retrospective case material consisted of 42 lion and tiger necropsy cases from 1972 to 1992. Necropsy reports for all lions and tigers were reviewed. All existing paraffin tissues were immunohistochemically examined with a polyclonal antibody raised against CDV. The results for 19 of the 42 lions and tigers were classified as positive by immunohistochemistry; 23 results were negative or questionable. The results for four animals (three positive and one negative ) were further tested by in situ hybridization, and the results concurred with the immunohistochemistry findings. CDV infection of large cats is older and more widespread than previously thought. All large cats in captivity should be immunized even if canine distemper is not believed to be a problem for large cats in the area.

Animals↗
PubMed1995

Acute urinary retention and the incarcerated, retroverted, gravid uterus. A case report.

A case of urinary retention was associated with an incarcerated, retroverted, gravid uterus. In a literature review of the English language we encountered 26 similar cases. Although no series of cases has allowed evaluation of a specific protocol for evaluation and management or analysis of outcomes, a review of the literature does outline certain diagnostic tests and treatment modalities that may be useful when one is faced with this uncommon condition.

Female↗
PubMed1995

Intracranial facial neuromas: total tumor removal with facial nerve preservation: a new surgical technique.

Neuromas of the facial nerve are uncommon tumors. The majority of cases involve the intratemporal and parotid areas. Since their description in 1930, there have been only 26 cases of intracranial facial neuroma reported in the world literature. Of these, 19 involved the middle cranial fossa, and only seven tumors extended into or originated in the posterior cranial fossa. In this location, the seventh nerve is surrounded by a very delicate and thin arachnoid casing. Thus, although these tumors are encapsulated, there is usually no obvious plane of separation between the tumor and perineurium. As a result, the seventh nerve has been sacrificed routinely. Two patients with posterior fossa facial neuromas underwent total tumor removal with a new surgical technique permitting preservation of the nerve fascicles via a translabyrinthine approach. Each patient has good recovery of seventh nerve function with no evidence of recurrence six and nine years later, respectively. Leaving the nerve fascicles intact appears to result in good reinnervation following total tumor removal. The potential value of this technique is best considered in the context of diagnostic and therapeutic options for facial neuromas in general. Neurotologists should find this a useful addition to their surgical armamentarium for selected cases.

Adult↗
PubMed1993

A comparison of the cough stress test and single-channel cystometry with multichannel urodynamic evaluation in genuine stress incontinence.

OBJECTIVE: To assess the predictability and accuracy of a simplified approach--the cough stress test and single-channel cystometry--in the diagnosis of genuine stress incontinence (GSI) by comparing these tests to the more complex multichannel cough urethral pressure profile and urethrocystometry. Conversely, we assessed the predictability and accuracy of the multichannel approach--the cough urethral pressure profile and urethrocystometry--in GSI by comparing these tests to the cough stress test and single-channel cystometry. METHODS: Prospectively, 145 women with complaints of urinary incontinence underwent a complete urogynecologic evaluation. All patients underwent single-channel cystometry with cough stress test and multichannel urethrocystometry with cough urethral pressure profiles in the erect position. Genuine stress incontinence was diagnosed if 1) the patient was seen to spurt urine per urethra with cough at full cystometric capacity in the absence of vesical instability as determined by single-channel cystometry, or 2) the cough urethral pressure profile demonstrated pressure equalization in the absence of vesical instability as determined by multichannel urethrocystometry. Statistical values were calculated for both the simplified and the multichannel methods, and measures of validity were compared statistically. RESULTS: For the diagnosis of GSI, the simplified method had a positive predictive rate of 87.2% and a negative predictive rate of 80.6%. The multichannel method had a positive predictive rate of 84.0% and a negative predictive rate of 84.4%. CONCLUSION: For the diagnosis of GSI, the simplified method of the cough stress test and single-channel cystometry is as accurate and predictive as the multichannel method.

Cough↗
PubMed1992

Complications of lumbar spinal fusion with transpedicular instrumentation.

Transpedicular screw fixation systems are coming into wide use as an adjunct to lumbar spinal fusion procedures. This 5-year series included 486 patients who underwent 533 variable screw placement procedures for discal, degenerative, and spondylolytic problems. The wound infection rate was 2.6%: 0.6% deep, 0.9% graft, and 1.1% superficial. The neural injury rate was 1.1% overall: 0.6% related to posterior lumbar interbody fusion and 0.6% related to instrumentation. Technical problems per procedure included 8.1% difficult screw placement, 5.6% nut loosening, and 4.3% screw breakage (1.1% per screw placed). Device modifications have reduced the incidence of screw breakage and nut loosening. No device-related neural injuries occurred in the last 333 procedures. With experience, the device can be applied safely without significantly increasing the risk of neural injury or morbidity.

Adult↗
PubMed1988

Giant cholesterol cysts of the petrous apex.

The giant cholesterol cyst is a clinical entity distinct from cholesterol granulomas and other destructive lesions of the petrous bone. Preoperative assessment by computed tomographic scan and magnetic resonance imaging is extremely helpful. Attempts at total resection of the lesion are not necessary. Adequate surgical drainage may be established through the mastoid or middle fossa.

Adolescent↗
PubMed1988

Total temporal bone resection. A radical but life-saving procedure.

Traditional therapeutic approaches for malignancies of the temporal bone have produced unacceptably low survival figures. The morbidity and mortality associated with temporal bone cancer justify extensive surgery. Total temporal bone resection can be performed successfully in the hands of an experienced skull-base surgical team. By circumscribing the tumor rather than transgressing it, this procedure follows generally accepted principles of oncologic surgery. This procedure also shows promise in resection of extensive, carefully selected, recurrent benign tumors. We believe this approach offers hope for improved survival in patients with malignancy of the temporal bone. Further refinements in technique are suggested by each new case. Additional experience and long-term follow-up are needed to assess the efficacy of this procedure. The interest, expertise, and active participation of the operating room nursing team are critical to the success of this surgery. Ideally, not only intraoperative participation but also preoperative assessment and postoperative support should be routine. Close cooperation and extensive communication among the surgeons and nurses are essential.

Adult↗
PubMed1987

Total temporal bone resection for squamous cell carcinoma.

Because of unsatisfactory results in treatment of malignant conditions of the temporal bone, a technique for total en bloc resection of the temporal bone and carotid artery was reported by Graham et al. in 1984. The procedure involves resection of the internal carotid artery, cranial nerves VI through XII, and structures adjacent to the temporal bone. Experience with two additional cases led to numerous modifications in the recommended procedure, as reported by Sataloff and Myers. Additional clinical experience with this technique and its complications has resulted in further modification. Additional pitfalls and specific changes in technique from previous reports are discussed in detail, including a new procedure to assure the adequacy of contralateral venous outflow.

Aged↗
PubMed1987

Transbronchial needle aspiration in the diagnosis of bronchogenic carcinoma.

Transbronchial needle aspiration (TBNA) was performed as a diagnostic procedure in 91 consecutive patients ultimately proven to have bronchogenic carcinoma. Results of TBNA were compared, in the same patients, to the diagnostic yield of cytologic examination of sputum, endobronchial brushings and washings, and endobronchial/transbronchial biopsy. The diagnostic yield for sputum was 13 percent (10 of 75); brushings, 40 percent (34 of 84); washings, 29 percent (26 of 89); biopsy, 56 percent (42 of 75); and TBNA, 45 percent (41 of 91). Aspirates were positive in 35 percent of patients with adenocarcinoma, 41 percent with squamous cell carcinoma, 52 percent with large cell undifferentiated carcinoma, and 55 percent of patients with small cell carcinoma. Carinal aspirates were positive in 54 percent (6 of 11); paratracheal aspirates, 57 percent (13 of 23); parabronchial aspirates, 39 percent (11 of 28); endobronchial, 78 percent (7 of 9), and peripheral mass or solitary pulmonary nodule, 40 percent (17 of 42). The overall diagnostic yield for brushings, washings, and biopsy was 64 percent. The addition of TBNA increased the yield to 71 percent. Bronchogenic carcinoma was diagnosed solely by TBNA in six patients, all with extrabronchial or extratracheal lesions. We conclude that TBNA increases the diagnostic yield of bronchoscopy, particularly in patients with extratracheal and extrabronchial lesions. An equally important observation is that TBNA fails to contribute significantly to the diagnosis of cancer in patients with lesions readily accessible by conventional bronchoscopic techniques. Exceptions to this observation include occasional patients with necrotic endobronchial tumors, submucosal lesions, and rarely patients with peripheral lung nodules or masses.

Adenocarcinoma↗
PubMed1986

Transbronchial needle aspiration staging of bronchogenic carcinoma.

Transbronchial needle aspiration (TBNA) has been advocated as a reliable technique in the nonsurgical staging of patients with bronchogenic carcinoma. Some have questioned the reliability of TBNA, however. We used TBNA directed by computed tomography (CT) in 88 consecutive patients with bronchogenic carcinoma who had undergone chest CT. Chest CT was 94% sensitive, 79% specific, and 85% accurate in evaluating the mediastinum for malignant lymphadenopathy. There were 19 malignant aspirates in 44 patients with malignancy and apparent adenopathy evaluated by chest CT. No malignant carinal aspirates were obtained in any patient with a normal mediastinum evaluated by chest CT. There were 2 false positive needle aspirates. One patient with apparent right paratracheal adenopathy and malignant needle aspirate had no mediastinal neoplasm detected at surgery. The other false positive aspirate had been contaminated by tracheal debris. The overall sensitivity, specificity, and accuracy of TBNA mediastinal staging were 50, 96, and 78%, respectively. We conclude that CT scanning is a useful adjunct in the staging of patients with bronchogenic carcinoma, and that TBNA is a sensitive and highly specific staging technique that may negate the need for surgical staging in a large number of patients with bronchogenic carcinoma.

Adenocarcinoma↗