Optimal Epidural Catheter Length for Labor Pain Relief in Non-obese Women

Optimum Length of Catheter in the Epidural Space for Labor Analgesia in Non-obese Women: a Randomised Controlled Trial of 4 Cm Versus 5 Cm

Not applicable Interventional Samuel Lunenfeld Research Institute, Mount Sinai Hospital · NCT04946032

This study tests whether using a 4 cm or 5 cm epidural catheter helps non-obese women have better pain relief during labor.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment200 (estimated)
Ages18 Years to 50 Years
SexFemale
SponsorSamuel Lunenfeld Research Institute, Mount Sinai Hospital Academic / other
Locations1 site (Toronto, Ontario)
Trial IDNCT04946032 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the optimal length of epidural catheter to be left in the epidural space for effective labor analgesia in non-obese women. It compares the efficacy of 4 cm versus 5 cm catheter lengths during the second stage of labor, aiming to standardize practices and improve outcomes. The study addresses issues such as catheter dislodgement and misdirection, which can lead to ineffective pain relief. By evaluating these lengths, the trial seeks to enhance the quality of labor analgesia and maternal-fetal outcomes.

Who should consider this trial

Good fit: Ideal candidates for this study are women aged 18 and older, in the established second stage of labor with a cervical dilation of 3-7 cm and a BMI under 40 kg/m2.

Not a fit: Patients who may not benefit from this study include those with contraindications to epidural insertion, high BMI over 40 kg/m2, or those requiring imminent instrumental or operative delivery.

Why it matters

Potential benefit: If successful, this study could lead to improved labor pain management and better outcomes for mothers and their babies.

How similar studies have performed: Previous studies have explored various catheter lengths, but this specific comparison of 4 cm versus 5 cm in non-obese women is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* All women aged 18 years and above.
* In established second stage of labor.
* 3-7 cm dilation at time of insertion.
* Women with BMI \< 40 kg/m2

Exclusion Criteria:

* Known contraindication to epidural insertion.
* Inability or unwillingness to provide written consent.
* Previous difficult epidural insertion.
* Previous failed epidural.
* Imminent instrumental or operative delivery.
* Dural puncture.
* Combined spinal epidural analgesia.
* High BMI \> 40 kg/m2

Where this trial is running

Toronto, Ontario

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Labor Painepidural catheterepidural analgesialabor epidural
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.