Overall incidence of obstetric anal sphincter injury 4.9 percent

January 18, 2018

(HealthDay)—The incidence of obstetric anal sphincter injury is 4.9 percent, and risk factors include vacuum-assisted vaginal delivery and prolonged duration of second stage of labor, according to a study published online Jan. 9 in Obstetrics & Gynecology.

Olga Ramm, M.D., from the Kaiser Permanente Oakland Medical Center in California, and colleagues conducted a including 22,741 singleton, term, cephalic, vaginal deliveries to examine the incidence of obstetric anal sphincter injuries, defined as third- or fourth-degree perineal lacerations.

The researchers found that the overall incidence rate of obstetric anal sphincter injuries was 4.9 percent (3.6 and 24.0 percent among women who delivered spontaneously versus those who had a vacuum-assisted vaginal delivery, respectively; P < 0.001). The odds of obstetric anal sphincter injury were increased for women with vacuum-assisted vaginal delivery (adjusted odds ratio, 4.23) and for those whose second stage of labor lasted at least 180 minutes versus less than 60 minutes (adjusted odds ratio, 3.20). In addition to vacuum-assisted delivery and a labor lasting longer than two hours, bivariate and multivariate analyses also showed a higher incidence of obstetric anal sphincter injury in Asian women and those giving birth for the first time, as well as in women who had a after cesarean delivery or an episiotomy.

"Vacuum-assisted vaginal conferred the highest odds of anal sphincter injury followed by prolonged duration of the second stage of labor, particularly among certain subpopulations," the authors write.

Explore further: OASIS risk up for nulliparous women with vacuum delivery

More information: Abstract/Full Text (subscription or payment may be required)

Related Stories

OASIS risk up for nulliparous women with vacuum delivery

August 24, 2012
(HealthDay)—For women whose infants are delivered by vacuum extraction, the risk of obstetric anal sphincter injury (OASIS) is significantly higher among nulliparous women than multiparous women, according to a study published ...

Recommendations developed for managing obstetric lacerations

June 25, 2016
(HealthDay)—Recommendations have been developed for the prevention and repair of obstetric lacerations during vaginal delivery. The new Practice Bulletin was published in the July issue of Obstetrics & Gynecology.

Incidence of recurrent anal sphincter rupture is 7.1 percent

October 26, 2012
(HealthDay)—The incidence of recurrent anal sphincter rupture (ASR) is 7.1 percent, and several risk factors are associated with an increased risk, including excessive birth weight, vacuum extraction, and shoulder dystocia, ...

Operative vaginal delivery remains appropriate

October 23, 2015
(HealthDay)—Operative vaginal delivery remains an important component of modern labor management, but obstetric care providers need to be familiar with the proper use of the instruments and the risks involved, according ...

Definition of prolonged third-stage labor may be outdated

April 11, 2016
(HealthDay)—Postpartum hemorrhage risk is significantly elevated with a third-stage labor duration of 20 minutes or more, according to research published in the May issue of Obstetrics & Gynecology.

New technique to prevent anal sphincter lesions due to episiotomy during child delivery

May 19, 2014
New minimally invasive method provides the obstetrician, any time before child delivery, with the outline of the anal sphincter innervation so that episiotomy can be ruled out or planned and guided to minimize sphincter damage.

Recommended for you

Vendors say pot eases morning sickness. Will baby pay a price?

May 22, 2018
(HealthDay)—Nearly 70 percent of Colorado marijuana dispensaries recommended pot products to manage early pregnancy-related morning sickness, new research reveals.

Pregnancy drug DES might have triggered ADHD in the grandchildren of women who used it

May 21, 2018
A study conducted by researchers at Columbia University's Mailman School of Public Health and Harvard T.H. Chan School of Public Health reported elevated odds for attention deficit hyperactivity disorder (ADHD) in the grandchildren ...

Male depression may lower pregnancy chances among infertile couples, study suggests

May 17, 2018
Among couples being treated for infertility, depression in the male partner was linked to lower pregnancy chances, while depression in the female partner was not found to influence the rate of live birth, according to a study ...

Fertility study finds acupuncture ineffective for IVF birth rates

May 15, 2018
A study of over 800 Australian and New Zealand women undergoing acupuncture treatment during their IVF (in vitro fertilization) cycle has confirmed no significant difference in live birth rates. The findings published today ...

More than one day of first-trimester bleeding ups odds for smaller baby

May 10, 2018
(HealthDay)—Some first-trimester bleeding occurs in up to 1 in every 4 pregnancies. Now, new research suggests that if bleeding extends beyond a day there could be implications for baby's birth weight.

For women with history of pregnancy loss, walking may aid chance of becoming pregnant

May 8, 2018
Results of a recent study to better understand modifiable factors such as physical activity that may affect a woman's ability to conceive a child suggest that walking may help women to improve their chances of becoming pregnant.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.