Obstetric Placement Study Using EST

  • days left to enroll
  • participants needed
  • sponsor
    Stanford University
Updated on 9 November 2021
pain relief
pain relieving


Combined spinal-epidural (CSE) is an established technique for providing labour analgesia to obstetric patients which provides rapid onset but unsustained analgesia. The epidural catheter can be used to extend and provide continuous pain relief, however during single-segment needle-through-needle CSE, the catheter is untested. This study aims to confirm placement of epidural catheters of anesthesia through the epidural stimulation test (EST) which was first described by the PI of the study for confirming placement of epidural catheters approximately 20 years ago.

Condition local anaesthetics, Post-Surgical Pain, Pain, Local anesthesia, local anesthetic, local anaesthetic, Labor Pain, Pain (Pediatric), Local Anesthetics
Treatment Electrical Epidural Stimulation Test (EST)
Clinical Study IdentifierNCT04109365
SponsorStanford University
Last Modified on9 November 2021


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Inclusion Criteria

Females, 18 years and older
American Society of Anesthesiologists physical status I or II
Full-term pregnancy with request for epidural early in labour (i.e. Regular labor or C-Section)

Exclusion Criteria

Contraindication to regional anesthesia
Allergy or hypersensitivity to lidocaine, bupivacaine, or fentanyl
Use of sedatives or opioids
Abnormal vertebrae anatomy
Neurological disorder with lumbar involvement
Implanted electronic devices
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