Penile Blood Flow Characteristics Following Caudal or Penile Block

Baylor College of Medicine

Status: Unknown

Conditions: The Aim of This Study is to Measure Blood Flow Before and After a Block

Treatments: Device: LMA placement; Procedure: Block performed

Study type: Observational

Funder types: Other

Identifiers

NCT04590859

H-48138

Details and patient eligibility

About

Pediatric urologic surgery is generally accompanied by use of a caudal or penile block for analgesia. A caudal block is performed by injecting local anesthetic in the low epidural space while a penile block is performed by injecting local anesthetic above the pubic symphysis. Local anesthetic in the epidural space is known to caudal vasodilation interiorly. It is unknown as to whether this vasodilation results in alteration in flow to the penile tissue and potentially changes tissue characteristics. The aim of this study is to measure blood ultrasound velocity in the dorsal penile artery and vein before and after a block.

Full description

Pediatric urologic surgery is generally accompanied by use of a caudal or penile block for analgesia. A caudal block is performed by injecting local anesthetic in the low epidural space while a penile block is performed by injecting local anesthetic above the pubic symphysis. Local anesthetic in the epidural space is known to caudal vasodilation interiorly. It is unknown as to whether this vasodilation results in alteration in flow to the penile tissue and potentially changes tissue characteristics. The aim of this study is to measure blood ultrasound velocity in the dorsal penile artery and vein before and after a block.

Enrollment: 25 estimated patients

Sex: Male

Ages: 2 to 7 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Children ages <7 years undergoing circumcision at TCH Penile or Caudal block to be performed at discretion of anesthesiology/Urology providers
• ASA classification1,2
• use of laryngeal mask airway

Exclusion criteria

• Previous cardiac surgery
• Antihypertensive medication
• requirement for intravenous anesthetic
• ASA classification non 1,2
• parental refusal of participation parental refusal of block
• patients requiring intubation

Trial design

25 participants in 2 patient groups

Penile block

Description:

Patients undergoing procedure with penile block

Treatment:

Device: LMA placement

Procedure: Block performed

caudal block

Description:

Patients undergoing procedure with caudal block

Treatment:

Device: LMA placement

Procedure: Block performed