Comparing shoulder pain relief methods to avoid diaphragm complications

Diaphragm Sparing Effect of Subomohyoid Block With Infraclavicular or Subscapularis Blocks in Comparison With Interscalen Block for Postoperative Analgesia in Shoulder Surgeries

Not applicable Interventional Zagazig University · NCT05920421

This study is testing different pain relief methods after shoulder surgery to see which one helps with pain while causing fewer problems with breathing.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment69 (estimated)
Ages21 Years to 60 Years
SexAll
SponsorZagazig University Government
Locations1 site (Zagazig, Sharqia)
Trial IDNCT05920421 on ClinicalTrials.gov

What this trial studies

This study evaluates the effectiveness of subomohyoid blocks, both infraclavicular and subscapularis, in providing postoperative analgesia for shoulder surgeries while minimizing diaphragm-related complications compared to the traditional interscalene block. It utilizes ultrasound to assess diaphragmatic mobility and the incidence of phrenic nerve palsy following the different block techniques. The goal is to determine which method offers better pain relief with fewer side effects, particularly concerning diaphragm function.

Who should consider this trial

Good fit: Ideal candidates are adults aged 21-60, ASA I and II, undergoing elective unilateral shoulder surgeries lasting less than 2 hours.

Not a fit: Patients with peripheral neuropathy, coagulopathy, or infections at the injection site may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to improved pain management for patients undergoing shoulder surgeries with reduced risk of diaphragm paralysis.

How similar studies have performed: While the interscalene block is well-established, the use of distal blocks like subomohyoid blocks is less common and may represent a novel approach to reducing diaphragm complications.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patient acceptance.
* ASA I and ASA II.
* Age 21-60 years old.
* Both gender.
* BMI \< 35 Kg/m2.
* Accepted mental state of the patient.
* Elective Unilateral upper limb surgeries at the level of the shoulder.
* Time of surgery less than 2 hours

Exclusion Criteria:

* - Patient refusal.
* Peripheral neuropathy.
* Pathological coagulopathy.
* Infection at the injection site.
* Untreated pneumothorax.
* Disturbed conscious level.
* An allergy to local anesthetics used in this study

Where this trial is running

Zagazig, Sharqia

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Shoulder Surgeries Operations
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.