Does Antenatal Fetal Head Circumference Predict Anal Sphincter Injury, a Prospective Study

January 7, 2010 updated by: University of California, Irvine
The purpose of this study is to see if fetal head circumference can be used as a predictor for who will experience a sphincter laceration while delivering.

Study Overview

Status

Completed

Conditions

Detailed Description

Even though much work has been invested in trying to identify risk factors that can predict which population will suffer from sphincter tears and other pelvic floor trauma, the epidemiology is still poorly understood. Factors that have been implicated to include operative vaginal delivery, birth weight, and primaparity. Up to this point little focus has been placed on antenatal factors that would help predict and prevent sphincter disruptions. At the time of birth the infant's head is the largest part of the body. Thus, head circumference of the infant may be able to predict which subjects is more likely to suffer from sphincter disruption. Thus, this study aims to determine whether or not fetal head circumference measured antenatally is predictive of pelvic floor trauma.

Study Type

Observational

Enrollment (Anticipated)

80

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Orange, California, United States, 92868
        • University of California, Irvine Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Sampling Method

Non-Probability Sample

Study Population

Women in 36 weeks and upto 42 weeks of pregnancy

Description

Inclusion Criteria:

  • Primiparous subjects at least 18 years of age
  • Gestational age greater than or equal to 36 weeks and upto 42 weeks gestation
  • Subjects must have give written informed consent to participate in this study
  • Subjects must be planning to deliver at UCI

Exclusion Criteria:

  • Subjects less than 18 years of age
  • Subjects with a previous delivery
  • Subjects with previous colorectal surgery or hemorrhoidal surgery
  • Subjects with a history of irritable bowel syndrome, ulcerative colitis, or Crohn's disease
  • Subjects with a history of colon or rectal cancer
  • Gestational age less than 36 weeks
  • Cesarean section

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Fetal head circumference and position, maternal pelvis, infant weight, maternal weight, length of the second stage, the incidence of sphincter tears as diagnosed by transvaginal ultrasound as well as the incidence of fecal urgency and incontinence.
Time Frame: 6 Months
6 Months

Secondary Outcome Measures

Outcome Measure
Time Frame
The magnitude of the effect of other factors such as maternal obesity, maternal age, duration of labor and pelvimetry on the risk of anorectal lacerations will be examined.
Time Frame: 6 Months
6 Months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of California, Irvine

Investigators

  • Principal Investigator: Karen L Noblett, M.D., University of California, Irvine

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2005

Primary Completion (Actual)

March 1, 2009

Study Completion (Actual)

March 1, 2009

Study Registration Dates

First Submitted

December 20, 2007

First Submitted That Met QC Criteria

December 21, 2007

First Posted (Estimate)

December 27, 2007

Study Record Updates

Last Update Posted (Estimate)

January 11, 2010

Last Update Submitted That Met QC Criteria

January 7, 2010

Last Verified

January 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2005-4575

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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