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Comparison of the Effects of Interscalene Block and Superior Trunk Block on Pulmonary Functions

NCT06703281 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 123

Last updated 2025-12-19

No results posted yet for this study

Summary

The interscalene block (ISB) is one of the peripheral nerve blocks providing surgical anesthesia and postoperative analgesia in shoulder arthroscopy, eliminating the need for general anesthesia. It is performed by administering local anesthetics (LA) to the C5-C6 roots between the scalene muscles at the level of the cricoid cartilage. ISB-related side effects, such as diaphragmatic paralysis, can occur with the spread of LA to the phrenic nerve over the anterior scalene muscle. To prevent this, a superior trunk block (STB) can be performed by administering LA close to the supraclavicular region where the C5-C6 roots merge into the superior trunk (further away from the phrenic nerve). Although there are studies in the literature demonstrating diaphragmatic paralysis using ultrasound and/or spirometry, no study evaluating diaphragmatic paralysis simultaneously with both ultrasound and spirometry under regional anesthesia alone has been found. Therefore, in this study, the investigators aim to assess the effects of this side effect on diaphragmatic excursion using ultrasound simultaneously and on respiratory functions using spirometry.

Conditions

  • Regional Anesthesia Morbidity
  • Complication Following Peripheral Nerve Block
  • Phrenic Nerve Paralysis

Interventions

PROCEDURE

Interscalene Nerve Block

Patients assigned to the Interscalene Nerve Block would have spirometry and ultrasound-guided diaphragm excursion measurements both pre and post-blok 30 minutes.

PROCEDURE

Superior trunk block

Patients assigned to the Superior Trunk Nerve Block would have spirometry and ultrasound-guided diaphragm excursion measurements both pre and post-blok 30 minutes.

Sponsors & Collaborators

  • Gazi University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2024-12-01
Primary Completion
2025-01-11
Completion
2025-01-31

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06703281 on ClinicalTrials.gov