Interscalene Block Versus Infraspinatus-Teres Minor Interfascial Plane Block for Shoulder Arthroscopy

NCT07670780 | Not Yet Recruiting

• 1 other identifier: 26-AKD-187
• Study Type: interventional
• Target: 120
• Locations: 0 countries
• Sites: N/A

Brief Summary

This prospective randomized controlled study aims to compare the effects of interscalene block, infraspinatus-teres minor interfascial plane block, and a control group on postoperative analgesia and diaphragmatic function in patients undergoing shoulder arthroscopy. A total of 120 patients will be enrolled and allocated into three groups. Postoperative pain scores, opioid consumption, rescue analgesic requirements, and diaphragmatic function will be evaluated and compared among the groups. The study seeks to determine whether the infraspinatus-teres minor interfascial plane block can provide effective postoperative analgesia with less impact on diaphragmatic function compared with interscalene block.

Conditions

Postoperative Pain; Shoulder Arthroscopic Surgeries; Diaphragmatic Dysfunction

Keywords

ınterscalene block; Shoulder Arthroscopy; Regional Anesthesia; Postoperative Analgesia; Diaphragmatic Function; Ultrasound-Guided Block; Infraspinatus-Teres Minor Interfascial Plane Block

Outcome Measures

Primary Outcomes (2)

• Postoperative Pain Intensity

  Postoperative pain intensity assessed using the Visual Analog Scale (VAS) , ranging from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. higher scores indicate greater pain intensity. compared between study groups.

  0, 2,4, 6, 12, and 24 hours after surgery

• Diaphragmatic Excursion

  Comparison of postoperative diaphragmatic excursion measured by ultrasonography between study groups.

  24 hours after surgery

Study Arms (3)

Interscalene Block Group

EXPERIMENTAL

Patients receive ultrasound-guided interscalene brachial plexus block for postoperative analgesia following shoulder surgery.

Procedure: Ultrasound-Guided Interscalene Block

Infraspinatus-Teres Minor Interfascial Plane Block Group

EXPERIMENTAL

Patients receive ultrasound-guided infraspinatus-teres minor interfascial plane block for postoperative analgesia after shoulder surgery.

Procedure: Ultrasound-Guided Infraspinatus-Teres Minor Interfascial Plane Block

Control Group

NO INTERVENTION

Interventions

Ultrasound-Guided Interscalene Block PROCEDURE

Ultrasound-guided interscalene brachial plexus block is performed before induction of anesthesia for postoperative analgesia in patients undergoing shoulder arthroscopy. The block is administered using ultrasound guidance according to institutional practice.

Interscalene Block Group

Ultrasound-Guided Infraspinatus-Teres Minor Interfascial Plane Block PROCEDURE

Ultrasound-guided infraspinatus-teres minor interfascial plane block is performed before induction of anesthesia for postoperative analgesia in patients undergoing shoulder arthroscopy. The block is administered using ultrasound guidance according to institutional practice.

Infraspinatus-Teres Minor Interfascial Plane Block Group

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Age between 18 and 65 years
• ASA physical status I-II
• Scheduled for elective shoulder arthroscopy
• No known allergy to study medications
• No psychiatric disorder
• No opioid dependence
• Ability to use patient-controlled analgesia (PCA) and complete VAS assessments
• No contraindication to peripheral nerve blocks
• Written informed consent obtained

You may not qualify if:

• Refusal to participate
• Uncontrolled hypertension
• Chronic pain or ongoing analgesic treatment
• Significant cardiac disease (coronary artery disease, arrhythmia, heart failure)
• Diabetes mellitus

Sponsors & Collaborators

• TC Erciyes University: lead

MeSH Terms

Conditions

Pain, Postoperative

Condition Hierarchy (Ancestors)

Postoperative Complications; Pathologic Processes; Pathological Conditions, Signs and Symptoms; Pain; Neurologic Manifestations; Signs and Symptoms

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Masking Details: Participants and outcome assessors are blinded to group allocation.
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor

Model Details: Participants will be randomized into three parallel groups: interscalene block, infraspinatus-teres minor interfascial plane block, and control group.

Study Record Dates

• First Submitted: June 22, 2026
• First Posted: June 26, 2026
• Study Start: June 22, 2026
• Primary Completion (Estimated): June 22, 2028
• Study Completion (Estimated): August 28, 2028
• Last Updated: July 1, 2026

Record last verified: 2026-06