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NCT Number: NCT05442814

Anterior and Posterior Approaches of Suprascapular Nerve Block

Suprascapular nerve is a mixed motor and sensory peripheral nerve arising from the superior trunk of brachial plexus.The suprascapular nerve runs through the posterior triangle of the neck, anterior of the trapezius muscle and dorsal of the omohyoid muscle, in direction of the scapula. Suprascapular nerve block is performed by anterior and posterior approach. Posterior approach of the suprascapular nerve block has been shown for many years to provide effective analgesia in the shoulder region for the chronic and acute pain. There are studies showing that suprascapular block with anterior approach provides effective analgesia in shoulder arthroscopy.

The aim of our study was to compare anterior and posterior approaches of suprascapular nerve block in terms of analgesic efficacy and patient safety.

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Key information

Conditions

Shoulder Pain Anterior Suprascapular Nerve Block Arthralgia Diaphragmatic Paralysis Joint Diseases Musculoskeletal Diseases Nervous System Diseases Neurologic Manifestations Pain Pain, Postoperative Paralysis Pathologic Processes Pathological Conditions, Signs and Symptoms Postoperative Complications Postoperative Pain Respiration Disorders Respiratory Insufficiency Respiratory Paralysis Respiratory Tract Diseases Signs and Symptoms Subomohyoid Suprascapular Nerve Block Suprascapular Nerve Block

Age range

18 year–80 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Istanbul Medeniyet University

Istanbul, 34722, Turkey (Türkiye)

About this study

This study is a prospective randomized clinical trial will be conducted between July 2022 and June 2023.Participant will divide into two groups as participant who underwent suprascapular nerve block with the anterior approach and participant who underwent suprascapular nerve block with the posterior approach. Bupivacaine 5 ml %0.5 will be injected both group. Diaphragmatic thickness fraction will be evaluated with ultrasound left and right 7.-8. subcostal anterior axillary border with the participant with the semi-sitting position. Diaphragmatic thickness fraction will measure before the block and after 30 minutes the surgery. Participants will administered intravenous morphine patient controlled analgesia for 24 hours stay. The amount of opioid analgesics given in both groups will be determined (in mg). Postoperative 4th, 6th, 12th, 24th hour Visual Analogue Scale scores of the participants and opioid consumptions until that hours will be evaluated. An addition participant will be determined according to the surgery.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patient who accepts to study protocol
  • Scheduled for shoulder surgery
  • Between the ages of 18 and 80

Exclusion criteria

  • Patients with coagulopathy
  • Patients with a history of local anesthetic drug allergy and toxicity
  • Patients with advanced organ failure
  • Patients with mental retardation
  • Patients with infection present at the injection site
  • Patients with diaphragm paralysis
  • Pregnant patients

Treatment and study plan

Posterior suprascapular block

Procedure

Diaphragmatic thickness fraction will be evaluated in the participant underwent suprascapular block performed by posterior approach

Anterior suprascapular block

Procedure

Diaphragmatic thickness fraction will be evaluated in the participant underwent suprascapular block performed by anterior approach

Primary outcomes

  1. Postoperative pain at the postoperatively 30 Minutes, 4 Hours, 6Hours, 12Hours, 24Hours

    Time frame: Up to 24 hours post-operative

    Visual analogue scale (0-10): 0= no pain, 10= the worst pain ever feel.

Secondary outcomes

  1. Diaphragmatic movements

    Time frame: Baseline (Before the block performed) and 30 minutes after the end of surgery

    Ratio of diaphragm thickness in end-inspiration and end-expiration measured by ultrasonography

  2. Peroperatively opioid analgesic consumption (Remifentanil)

    Time frame: up to postoperative 0 minutes

    milligram

  3. Postoperative opioid analgesic consumption (morphine)

    Time frame: postoperative 30 minutes

    milligram

  4. Postoperative opioid analgesic consumption (morphine)

    Time frame: postoperative 4 hours

    milligram

  5. Postoperative opioid analgesic consumption (morphine)

    Time frame: postoperative 6 hours

    milligram

  6. Postoperative opioid analgesic consumption (morphine)

    Time frame: postoperative 12 hours

    milligram

  7. Postoperative opioid analgesic consumption (morphine)

    Time frame: postoperative 24 hours

    milligram

  8. Postoperative pain at postoperative 4 Hours

    Time frame: at postoperative 4 Hours

    Visual analogue scale (0-10): 0= no pain, 10= the worst pain ever feel.

  9. Postoperative pain at postoperative 6 Hours

    Time frame: at postoperative 6 Hours

    Visual analogue scale (0-10): 0= no pain, 10= the worst pain ever feel.

  10. Postoperative pain at postoperative 12 Hours

    Time frame: at postoperative 12 Hours

    Visual analogue scale (0-10): 0= no pain, 10= the worst pain ever feel.

  11. Postoperative pain at postoperative 24 Hours

    Time frame: at postoperative 24 Hours

    Visual analog scale (0-10): 0= no pain, 10= the worst pain ever feel.

Sponsors and collaborators

Lead sponsor

Istanbul Medeniyet University

Other

Registry information

Official study title

Comparison of Anterior and Posterior Approaches of Suprascapular Nerve Block in Arthroscopic Shoulder Surgery

Important dates

Study start
2022
Primary completion
2023
Study completion
2023
First posted
Jul 5, 2022
Registry last updated
Feb 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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