Buffered Lidocaine in Paracervical Blocks

Completed · Phase 4

Conditions studied: Pain

In brief

For pain relief during a first trimester surgical aspiration, most providers use the paracervical block, either alone or in combination with other pain control techniques. Some providers use buffered lidocaine due to a belief that it decreases pain. Others use plain lidocaine. At our clinics, the standard pain management protocol is using 20 cc of 1% plain lidocaine in a two site injection. Few studies have compared buffered versus unbuffered lidocaine for paracervical blocks during first trimester uterine aspirations. This study seeks to determine if buffered lidocaine decreases injection pain versus plain lidocaine for paracervical blocks.

Key facts

Study ID

NCT03107754

Run by

University of Hawaii

People needed

98

Starts

2017-05-15

Expected to finish

2018-10-25

Last updated by the study team

2021-01-05

Who can join

Age: 14 and older. Sex: female. Healthy volunteers: accepted.

You may qualify if…

• Pregnant women 14 years and older
• Desiring uterine aspiration for pregnancy or surgical management of a miscarriage
• Gestational age up to 13 weeks and 6 days to be established by best dating (i.e. last menstrual period or earliest ultrasound)
• Treatment plan involves outpatient uterine aspiration
• Participant able to provide informed consent in English and willing to participate in the study

You may not qualify if…

• Unable to read, speak, or understand English
• Unable to provide informed consent
• Currently incarcerated
• Under the age of 14 years
• Contraindications to receiving lidocaine or buffered lidocaine

Where it is running

• Womens Options Center — Honolulu, Hawaii, United States

Full record on ClinicalTrials.gov

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