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
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.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Istanbul, Turkey (Türkiye)
- Bahcesehir Unişversity Medicalpark Goztepe hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Adult living liver donors undergoing elective donor hepatectomy
- Age 18 to 65 years
- ASA physical status I-II
- Patients who have received ultrasound-guided interfascial plane blocks as part of their postoperative analgesia
- Ability to cooperate with postoperative sensory mapping procedures
- Patients who agree to participate and provide written informed consent
Exclusion Criteria:
- Patients who refuse to participate or do not provide written informed consent
- Patients who have not received any ultrasound-guided interfascial plane block
- ASA physical status > II
- Presence of surgical incisions or wound complications preventing reliable sensory mapping
- Prior major abdominal surgery that may alter cutaneous innervation patterns
- Cognitive impairment limiting the ability to cooperate with sensory testing
- Known psychiatric disorders (e.g., major depression, mania, schizophrenia) that may interfere with postoperative assessment
- Local infection, skin disease, or dermatologic condition preventing accurate cutaneous mapping
- Allergy or contraindication to local anesthetics used in the block
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
|---|---|---|
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Cutaneous sensory block area mapping for different regional anesthesia techniques in liver donor surgery
Time Frame: At 120 minutes after block administration in the post-anesthesia care unit (PACU).
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The cutaneous sensory block area produced by the regional anesthesia technique will be evaluated at the 120th minute post-block using a standardized pinprick test.
Sensory borders will be identified radially and marked on the skin with a UV-visible marker.
Each mapped region will be photographed with a calibrated reference scale placed on the skin.
These images will be processed using a predefined digital template to calculate the total blocked surface area in square centimeters.
The resulting measurements will be used to characterize the sensory distribution of the interfascial plane blocks in living liver donors.
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At 120 minutes after block administration in the post-anesthesia care unit (PACU).
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- Liver mapping
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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