NCT07252063

Sensory Distribution and Postoperative Analgesia of Ultrasound-Guided Interfascial Plane Blocks in Living Liver Donors

Assessment of Sensory Block Distribution and Postoperative Analgesia Following Ultrasound-Guided Interfascial Plane Blocks in Living Liver Donors: A Prospective Observational Study

• Status: Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 20 (estimated)
• Sponsor: Bahçeşehir University · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: —

Summary

Living liver donor hepatectomy at our institution routinely includes ultrasound-guided interfascial plane blocks as part of postoperative analgesia. Although these blocks have become increasingly used in donor hepatectomy, their cutaneous sensory distributions and block-related dermatomal coverage have not been systematically evaluated, with only anecdotal reports available in the literature. This prospective observational study aims to assess both the sensory blockade patterns and the early postoperative analgesic performance of interfascial plane blocks administered to living liver donors. Following surgery, all consenting donors receive the institution's standard block protocol. Cutaneous sensory mapping is performed in the post-anesthesia care unit (PACU) at the second postoperative hour. Pain intensity and analgesic requirements within the first 24 hours are also recorded. The study is designed to provide objective data on the dermatomal coverage and postoperative analgesic effects of contemporary ultrasound-guided interfascial plane blocks used in living liver donor surgery.

Conditions

• Pain

Interventions

Type	Name	Description
OTHER	interfascial plane block	Ultrasound-guided interfascial plane blocks are administered at the end of surgery. Block selection and needle entry points are determined according to the surgical incision line and the location of abdominal drains. All blocks are performed under real-time ultrasound guidance using the institution's standardized protocol.
OTHER	patient controlled analgesia device	Intravenous patient-controlled analgesia is initiated in the postoperative period according to the institution's standard protocol. PCA settings, opioid type, basal infusion (if applicable), and bolus doses follow routine clinical practice and are recorded for analysis. PCA use during the first 24 hours is monitored to assess postoperative analgesic requirements.
OTHER	cutaneus sensory mapping	Cutaneous sensory mapping is performed in the post-anesthesia care unit (PACU) at the second postoperative hour. Sensory blockade is assessed using a standardized pinprick test applied radially from medial to lateral directions. The borders of the blocked and unblocked regions are marked on the skin using a UV-visible dermatographic pen. Mapping is conducted over the mid-abdominal and lateral abdominal regions, and the total cutaneous coverage areas are subsequently calculated for analysis.

Timeline

• Start date: 2025-11-01
• Primary completion: 2025-12-31
• Completion: 2026-01-01
• First posted: 2025-11-26
• Last updated: 2025-11-26

Locations

1 site across 1 country: Turkey (Türkiye)