Sensory Distribution and Postoperative Analgesia of Ultrasound-Guided Interfascial Plane Blocks in Living Liver Donors
NCT ID: NCT07252063
Last Updated: 2025-11-26
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
20 participants
OBSERVATIONAL
2025-11-01
2026-01-31
Brief Summary
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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.
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Detailed Description
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Conditions
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Study Design
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COHORT
PROSPECTIVE
Interventions
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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.
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.
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.
Eligibility Criteria
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Inclusion Criteria
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 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
18 Years
65 Years
ALL
No
Sponsors
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Bahçeşehir University
OTHER
Responsible Party
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Selma Basyigit
Department of Anesthesiology
Locations
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Bahcesehir Unişversity Medicalpark Goztepe hospital
Istanbul, , Turkey (Türkiye)
Countries
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Central Contacts
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Facility Contacts
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Selma Kahyaoglu
Role: primary
Other Identifiers
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Liver mapping
Identifier Type: -
Identifier Source: org_study_id
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