Characterization of the Pudendal Nerve with Transvaginal Ultrasonography

University of Virginia

Status: Enrolling

Conditions: Anesthesia

Treatments: Other: All subjects-Observation

Study type: Observational

Funder types: Other

Identifiers

NCT06021782

HSR22513

Details and patient eligibility

About

This is a feasibility study characterizing the ability of transvaginal ultrasonography to identify the pudendal nerve. Today, the pudendal nerve block is typically accomplished through blind landmark techniques, thus limiting its success. To date, there has never been an attempt to determine if the visualization of the pudendal nerve would be possible using transvaginal ultrasound with existing technology; nor to perform this procedure transvaginally with the assistance of ultrasound.

Full description

This is a feasibility study characterizing the ability of transvaginal ultrasonography to identify the pudendal nerve. The pudendal nerve is a sensory and motor nerve arising from the sacral plexus, innervating the perineum. Anesthesia of the pudendal nerve (pudendal nerve block) is used to assist during obstetrical procedures (forceps delivery, vaginal tear repair), to improve discomfort associated with vaginal delivery when time is not sufficient to place an epidural, and to reduce pain following certain urogynecological surgeries [1-4]. Pudendal nerve block is also used to manage chronic pain associated with pudendal neuralgia [5]. Today, the pudendal nerve block is typically accomplished through blind landmark techniques, thus limiting its success [6-7]. More recently, efforts have been made to attempt this procedure with ultrasound from a more external approach transglutially, however this method requires high level of technical skill and is associated with high failure rate when compared to a blind landmark technique [8-10]. Other methods of accomplishing pudendal nerve blocks include the use of fluoroscopy. However, these renders the procedure more costly and subjects the patient to the inherent risk of radiation [11]. To date, there has never been an attempt to determine if the visualization of the pudendal nerve would be possible using transvaginal ultrasound with existing technology; nor to perform this procedure transvaginally with the assistance of ultrasound.

Enrollment: 24 estimated patients

Sex: Female

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Scheduled to undergo transvaginal ultrasound at the Fetal Care Center (FCC) or Gynecology clinic
• Patients undergoing pelvic floor surgery at either the Main OR or outpatient surgery center at UVA will be included. This includes surgeries performed by surgeons in the Department of OBGYN, Division of Pelvic Medicine and Reconstructive Surgery, and includes surgeries for repair of prolapse, urinary incontinence, fistula, urethral diverticulum, or other pelvic floor issues.
• >18 years age
• English-speaking

Exclusion criteria

• Refusal to participate

Trial design

24 participants in 1 patient group

All subjects

Description:

Patients scheduled to have their transvaginal ultrasound for medical reasons at the fetal care center and gynecology clinic will be asked to participate in this study. Also, patients undergoing pelvic floor surgery at either the Main OR or outpatient surgery center at UVA will be asked to participate.

Treatment:

Other: All subjects-Observation