PubMed Health⌕ Search

Biomedical subjects

A C Olivar

Publications and source records attributed to A C Olivar.

4 recordsLinked to original sources
PubMed1996

The role of laparoscopic ovarian biopsy in the management of premature gonadal failure.

Approximately 1% of women enter menopause before 40 years of age. This premature event, however, is not as consequential when women have completed their reproductive lives as when they desire another pregnancy. When this latter situation does arise, the question facing the clinician is whether the ovaries still have follicles (resistant ovary syndrome) or they are depleted of these primordial follicles (premature menopause). The only way to demonstrate the presence of or absence of primordial follicles in the ovaries is by obtaining an adequate biopsy specimen for histopathologic diagnosis, a procedure that can be done via laparoscopy. This study had two purposes: one was to determine whether laparoscopic ovarian biopsy can provide an adequate specimen for histopathologic diagnosis safely and with low complication rates, and the other, to ascertain the relative frequency of premature menopause and resistant ovary syndrome.

Adult↗
PubMed1995

Is there a need for guidelines for OB/GYN residents to use the laser?

BACKGROUND AND OBJECTIVE: With the developing technologies and the extensive use of different wavelength lasers for treatment of some gynecologic conditions, many residencies in the United States face pressure to give credentialing to residents wishing to utilize the laser(s). The objective of this study was to assess the need for credentialing. STUDY DESIGN/MATERIALS AND METHODS: A survey was sent to all U.S. program directors of obstetrics and gynecology. RESULTS: Of 281 surveys mailed, 138 responded (49.1%); 136 utilized some wavelength laser in the treatment of some gynecologic conditions. The most commonly used laser was the carbon dioxide (CO2), and the least used was the argon laser. Eighty-four programs (61.8%) had a written policy; 54 (38.2%) did not. Postgraduate courses were necessary in 81 programs (59.6%), leading to some form of credentialing. CONCLUSIONS: The vast majority of programs (98.6%) utilized some wavelength laser as a therapeutic modality in gynecology, and 73.5% of the residency programs would like standardized guidelines for residents.

Credentialing↗
PubMedDate not supplied

Transmission electron microscopy: evaluation of damage in human oviducts caused by different surgical instruments.

Different wave length lasers (CO2, Nd-YAG, KTP-532), electrocautery and radiofrequency instruments were used to assess the degree of tissue damage in human oviducts. Excision of the human fallopian tube for tuboplasty is achieved most often by electrocautery, scalpel and, more recently, the Carbon Dioxide (CO2) Laser. There is not enough evidence at the present time to scientifically justify using one particular mode of incision which would show minimal damage to surrounding healthy tissue, especially heat lateral damage. The present study compares the tissue damage produced by the microelectrocautery, the CO2, the KTP-532, the Nd-YAG lasers and the radiofrequency surgical instrument, utilizing different power densities on the fallopian tubes freshly removed at the isthmic portion, taken from healthy women ages 30-42. Transmission electron microscopy sections at the cellular level show that the electrosurgical radiofrequency surgical instrument produces the least damage to surrounding healthy tissue. The CO2 laser with intermittent superpulse mode showed the second lowest amount of damage. The most damage was observed with the Nd-YAG laser at high power densities.

Adult↗