Confirming the safety of transvaginal sonography in patients suspected of placenta previa.

Full Abstract

OBJECTIVE: To evaluate the safety of transvaginal ultrasonography in the diagnosis of placenta previa by determining whether the angle between the cervix and the vaginal probe is sufficient for alignment of the probe with the cervix. METHODS: The angle between the axis of the cervix and that of the vaginal probe (the axis of the vagina) was measured from copies of the transvaginal ultrasound examinations of 18 patients with documented placenta previa past 20 weeks' gestation. The measurements were compared with those of gestationally matched controls without placenta previa. RESULTS: The mean angles were 63.8 degrees and 67.5 degrees, with minimum angles of 44 degrees and 48 degrees for the placenta previa and control groups, respectively. The values were not statistically different. CONCLUSION: These findings strengthen the previously undocumented presumption that the angle between the cervix and vaginal probe is sufficient to prevent the probe from inadvertently slipping into the cervix. Therefore, this study supports the safety of transvaginal sonography in diagnosing and monitoring patients with known placenta previa.

Author information

Author/s: Timor-Tritsch, I E (IE); Yunis, R A (RA);

Affiliation: Department of Obstetrics and Gynecology, Sloane Hospital for Women, Columbia Presbyterian Medical Center, New York, New York.

Journal and publication information

Publication Type: Journal Article

Journal: Obstetrics and gynecology (Obstet Gynecol), published in UNITED STATES. (Language: eng)

Reference: 1993-May; vol 81 (issue 5 ( Pt 1)) : pp 742-4

Dates: Created 1993/05/13; Completed 1993/05/13; Revised 2009/10/26;

PMID: 8469465, status: MEDLINE (last retrieved date: 10/26/2009)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

External Links for this article
(including full text providers, if available):

Click Electronic Full-text Provider Links to see options for finding the electronic full text links to this article. Note there may be a subscription or fee required for access to the full text. See our FAQ for information on finding FREE full text articles.

This article may also be located in paper journal collections available in many libraries. Use the Journal and Publication Information above to find the full article.