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Featured researches published by Michael S. Opsahl.


Fertility and Sterility | 1993

The predictive value of hysterosalpingography for tubal and peritoneal infertility factors

Michael S. Opsahl; Bradley T. Miller; Thomas A. Klein

OBJECTIVE To investigate a practical classification system of hysterosalpingogram (HSG) results that accurately identifies patients with severe pelvic disease or a normal pelvis to allow appropriate patient counseling of therapeutic options. DESIGN Retrospective chart review from university teaching hospital. Hysterosalpingography results were classified as normal, abnormal (bilateral distal tubal obstruction), or suspicious (all others). At surgery, chromopertubation was performed, and pelvic disease was documented. RESULTS From a total of 756 patients, HSGs were confirmed surgically in 96.6% of normals, 63.1% of suspicious, and 95.7% of abnormal. Associated moderate-severe pelvic disease was found in 16.2% of normals, 53.9% of suspicious, and 81.7% of abnormal. CONCLUSION Abnormal HSGs are highly predictive of severe pelvic disease, and counseling of treatment options does not require diagnostic laparoscopy. Patients with suspicious HSGs frequently have normal tubes but also have a significant likelihood of tubal or associated pelvic disease, and they are responsible for the poor predictive value of the HSG. This group of patients requires confirmatory laparoscopy preferably by a physician qualified in pelviscopic surgery. Normal HSGs have a high negative predictive value. Nevertheless, the incidence of associated pelvic disease in the normal HSG group is high enough to warrant diagnostic laparoscopy if nonsurgical treatment is unsuccessful.


American Journal of Obstetrics and Gynecology | 1992

Natural killer cell activity from pregnant subjects is modulated by RU 486

Keith A. Hansen; Michael S. Opsahl; Lynnette K. Nieman; James R. Baker; Thomas A. Klein

Natural killer cells form an integral component of the bodys innate immune system. Natural killer cell activity is reduced during pregnancy, especially in the latter half. To investigate the role progesterone may play in immunomodulating natural killer cell activity during pregnancy, we evaluated the effect of RU 486 on natural killer cells isolated from pregnant subjects. Natural killer cell activity was measured with an 18-hour, Chromium 51 release, microcytotoxicity assay with K-562 cells as target cells. We demonstrated that RU 486, in a concentration range from 5 to 40 mumol/L, augmented natural killer activity threefold to fivefold over baseline. This augmentation of activity was suppressed to baseline by the addition of excess progesterone. The addition of hydrocortisone resulted in an insignificant reduction in this augmented activity. This study suggests that progesterone may play a role as an immunomodulating factor in maternal acceptance of the fetal allograft.


Journal of Assisted Reproduction and Genetics | 2002

Aggressive outpatient treatment of ovarian hyperstimulation syndrome with ascites using transvaginal culdocentesis and intravenous albumin minimizes hospitalization.

Stephen R. Lincoln; Michael S. Opsahl; Keith L. Blauer; Susan H. Black; Joseph D. Schulman

Purpose: To assess the effectiveness of outpatient treatment of Ovarian Hyperstimulation Syndrome associated with ascites. Methods: Forty-eight patients diagnosed with ovarian hyperstimulation and ascites from 2246 consecutive in vitro fertilization cycles were retrospectively studied. Patients were treated with outpatient transvaginal culdocentesis and rehydration with intravenous crystalloids and albumin every 1–3 days until resolution of symptoms or hospitalization was required. Outcomes measured included incidences of hospitalization, pregnancy outcomes, cycle characteristics, and oocyte donors versus nondonors comparisons. Results: No complications occurred from outpatient treatments, and 91.6% of patients avoided hospitalization. The pregnancy rate in patients undergoing transfer was 84.7%, and the spontaneous loss rate was 16%. Overall, the estradiol on day of hCG was 4331 pg/mL (range 2211–8167), ascites removed was 1910 cm3 (122–4000), and number of outpatient treatments was 3.4 (1–14). Nondonors averaged more outpatient treatments than donors (3.97 vs. 1.85), but similar rates of hospitalization (3/35 vs. 1/13). Conclusions: Outpatient treatment consisting of culdocentesis, intravenous rehydration, and albumin minimized the need for hospitalization in hyperstimulated patients.


Fertility and Sterility | 1994

The effect of a surgical lubricant on in vivo sperm penetration of cervical mucus

Bradley T. Miller; Thomas A. Klein; Michael S. Opsahl

The implications of these data is that coital lubricants may impair fertility of some couples. Unfortunately, conception was not an end point on this study, and our conclusions must be considered inferential. Nevertheless, the results from this study lead us to recommend avoidance of surgical lubricants by couples attempting pregnancy.


Gynecologic and Obstetric Investigation | 1994

Natural Killer Cell Activity in Early Human Pregnancy

Michael S. Opsahl; K. Hansen; Thomas A. Klein; Dean S. Cunningham

Natural killer (NK) cell activity was determined in 41 women during the first trimester of pregnancy. NK cytotoxicity was similar between the study subjects and nonpregnant controls and was not a reflection of a change in the circulating number of cells or density in culture. Although NK cells may play a role in maternal immune status in advanced pregnancy, NK cells do not appear to be crucially involved in the first trimester, when reproductive wastage usually occurs.


Fertility and Sterility | 1990

Tubal and peritoneal factors in the infertile woman: use of patient history in selection of diagnostic and therapeutic surgical procedures

Michael S. Opsahl; Thomas A. Klein

For facilities with both ambulatory and inpatient surgical capabilities, we have attempted to develop an efficient strategy for the evaluation of infertile women. The strategy was intended to (1) avoid inpatient laparoscopy, (2) minimize the number of patients having laparoscopy who subsequently required laparotomy, and (3) minimize hysterosalpingography (HSG). Patients were selected for ambulatory laparoscopy or inpatient laparotomy by means of an algorithm based on their history and the selective use of HSG. Laparoscopy was avoided in 18.1% of patients and HSG in 41.6% of patients. We conclude that, when both inpatient and outpatient surgical facilities are available, the evaluation of female infertility may not always require HSG or laparoscopy.


Fertility and Sterility | 1987

The role of laparoscopy in the evaluation of candidates for sterilization reversait

Michael S. Opsahl; Thomas A. Klein

An algorithm that avoids preliminary laparoscopy for sterilization reversal (SR) candidates with previous Pomeroy, loop, Hulka clip, Irving, and single-burn cautery tubal ligation techniques was used. Anastomosis was attempted only when it could be anticipated that the final length of at least one tube would be 3 cm or more. Of 259 SR candidates evaluated according to the algorithm, 235 had SR procedures. Seven of 185 patients (3.8%) who did not undergo laparoscopy were found to have inoperable tubes at laparotomy. Four of these patients had histories of a prior unilateral salpingectomy. The authors conclude that, given their criteria for proceeding with tubal anastomosis, laparoscopy can be avoided in properly selected SR candidates. The results also indicate that patients with a history of unilateral salpingectomy should undergo preliminary laparoscopy.


Gynecologic and Obstetric Investigation | 1994

Characterization of Peripheral Blood and Peritoneal Fluid Mononuclear Cell Subsets in Fertile and Infertile Women

Michael S. Opsahl; Clifford C. Hayslip; Thomas A. Klein; Dean S. Cunningham

Mononuclear cell subpopulations from the peripheral blood (PB) and peritoneal fluid (PF) of fertile and infertile women were quantified by flow cytometry using a double-staining monoclonal antibody technique. No differences in the percentage distribution of mononuclear cells between fertile and infertile women were demonstrated when either the PB constituents or the PF components were compared to one another. When the mononuclear cell composition in the PB was compared with that in the PF however, the percentage of PF-activated T cells and monocytes was increased in both fertile and infertile women as opposed to that in the PB, while there was a decrease in T helper cells (fertile and infertile women) and natural killer cells (fertile women and infertile women with endometriosis). Even though shifts do exist in the immunocytes of PF from fertile and infertile women, evidence is lacking that the PF is an immunologic mediator of infertility.


The Journal of Clinical Endocrinology and Metabolism | 1988

Natural killer cell activity and serum autoantibodies in women with postpartum thyroiditis

Clifford C. Hayslip; James R. Baker; Thomas A. Klein; Michael S. Opsahl; Kenneth D. Burman


Gynecologic and Obstetric Investigation | 1995

Activation of Complement in Humans with a First-Trimester Pregnancy Loss

James R. Tichenor; Linda B. Bledsoe; Michael S. Opsahl; Dean S. Cunningham

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Thomas A. Klein

Walter Reed Army Medical Center

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Bradley T. Miller

Walter Reed Army Medical Center

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Clifford C. Hayslip

Walter Reed Army Medical Center

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Andrew Dorfmann

National Institutes of Health

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Caird E. Rexroad

Uniformed Services University of the Health Sciences

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Carolyn B. Coulam

Genetics and IVF Institute

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Edward F. Fugger

Genetics and IVF Institute

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Keith L. Blauer

Genetics and IVF Institute

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