Self-Administered Lidocaine Gel for Pain Management With First Trimester Surgical Abortion: A Randomized Controlled Trial

Phase 3

Completed

• Conditions: Pregnancy, Unwanted
• Interventions: Drug: standard lidocaine paracervical block; Drug: vaginal 2% Xylocaine

• Registration Number: NCT02447029
• Lead Sponsor: Stanford University

Brief Summary

Despite global efforts to decrease discomfort during surgical abortion, pain remains a limiting factor in where and how procedures are performed. Several studies have investigated different methods of delivering cervical anesthesia prior to abortion, however to the best of the investigators' knowledge, there is no published data that 1) rigorously examines the effect of a time interval between local anesthetic administration and procedure initiation, or 2) explores whether adequate pain relief is possible through self-administered, non-invasive means alone. Research in this area has a significant public health impact, given the large number of women worldwide who seek abortions.

The investigators propose to explore the effect of a locally applied vaginal lidocaine gel in place of the traditional paracervical block prior to first trimester surgical abortion. They hypothesize that lidocaine gel is no worse than paracervical block at decreasing abortion related pain at a variety of time points throughout the procedure. This is a non-inferiority, open label, randomized controlled trial.

If self-administered vaginal gel is acceptable and effective, it would increase options for pain control during abortion and other gynecologic procedures.

Detailed Description

Abortion remains one of the most common surgical procedures in the world, regardless of region or development status \[Guttmacher 2012\]. In the United States, at least half of all women will experience an unintended pregnancy by age 45, and one third of all women will have had an abortion by this same age \[Guttmacher 2014\].

Despite universal efforts to increase the comfort of these procedures, pain remains a limiting factor in where and how abortion is performed. Recent estimates reveal that 70-97% of women experience pain during abortion \[Renner 2010, Paul 2009, Belanger 1988\]. Strategies to reduce all aspects of abortion related pain have the potential for significant public health impact, given the large number of women who seek these services. A survey of National Abortion Federation clinics found that to date, most providers (84%) employ the use of a lidocaine paracervical block for cervical anesthesia prior to abortion \[O'Connell 2009\], but traditionally without a waiting period between lidocaine administration and procedure initiation.

To the best of our knowledge, there are no published studies that 1) rigorously examine the effect of a time interval between local anesthetic administration and procedure initiation, or 2) explore whether adequate pain relief is possible through self-administered, non-invasive means alone. The investigators propose to explore the effect of a locally applied lidocaine gel in place of the traditional paracervical block to decrease abortion related pain.

The objective of this study is to compare pain control at various time points during first trimester surgical abortion using a locally applied, patient-administered lidocaine gel as compared to traditional lidocaine paracervical block.

If a patient-administered vaginal gel is acceptable and effective, it would increase options for pain control during abortion and other gynecologic procedures, and perhaps replace paracervical injection altogether.

Hypothesis: Patients who receive lidocaine gel applied 30 minutes prior to first trimester surgical abortion will have pain control equivalent to that of a traditional paracervical block.

This is a non-inferiority, open-label, randomized controlled trial of women ages 18 and older undergoing first trimester surgical abortion at 50/7 to 116/7 weeks.

Study Timeline

• Study First Submitted: 2014-12-01
• Study Start: 2015-04
• Study First Submitted QC: 2015-05-13
• Study First Posted: 2015-05-18
• Primary Completion: 2016-01
• Study Completion: 2016-01
• Results First Submitted: 2017-05-05
• Results First Submitted QC: 2017-07-20
• Results First Posted: 2017-07-24
• Status Verified: 2024-01
• Last Update Submitted: 2024-01-19
• Last Update Posted: 2024-02-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Female
• Target Recruitment: 142

Inclusion Criteria

Not provided

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
standard lidocaine paracervical block	standard lidocaine paracervical block	standard lidocaine paracervical block
Active Comparator	vaginal 2% Xylocaine	Drug: vaginal 2% Xylocaine

Primary Outcome Measures

Name	Time	Method
Difference in Pain Level at Time of Cervical Dilation as Measured by a Visual Analog Scale	At time of cervical dilation, 30 minutes after lidocaine administration	This is the amount of pain self-reported by the patient at the time of cervical dilation. VAS ranged from 0 to 100 mm, 0 equals no pain, 100 equals worse pain imaginable.

Secondary Outcome Measures

Name	Time	Method
Pain With Tenaculum Placement as Measured by a Visual Analog Scale	Pain at time of tenaculum placement	This is the amount of pain self-reported by the patient at the time of tenaculum placement. VAS ranged from 0 to 100 mm, 0 equals no pain, 100 equals worse pain imaginable.
Overall Satisfaction With Procedure as Measured by a Visual Analog Scale	30-45 minutes after completion of procedure	This is the level of overall satisfaction self-reported by the patient at the completion of the procedure and prior to discharge. VAS ranged from 0 to 100 mm, 0 equals not satisfied, 100 equals highest satisfaction possible.
Pain 30-45 Minutes After Procedure as Measured by a Visual Analog Scale	Pain prior to discharge home: 30-45 minutes after completion of procedure	This is the amount of pain self-reported by the patient 30-45 minutes after procedure. VAS ranged from 0 to 100 mm, 0 equals no pain, 100 equals worse pain imaginable.
Pain Level Prior to Procedure (Anticipated Pain) as Measured by a Visual Analog Scale	Pain level prior to procedure	This is the amount of pain self-reported by the patient prior to the procedure (Anticipated pain). VAS ranged from 0 to 100 mm, 0 equals no pain, 100 equals worse pain imaginable.
Pain With Speculum Insertion as Measured by a Visual Analog Scale	Pain at time of speculum insertion	This is the amount of pain self-reported by the patient at the time of speculum insertion. VAS ranged from 0 to 100 mm, 0 equals no pain, 100 equals worse pain imaginable.
Overall Complication Rate as Measured by a Count of Participants in Each Group	Rate of complications at the end of the study

Trial Locations

Locations (1)

Planned Parenthood Mar Monte; 🇺🇸 San Jose, California, United States