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Enrolling by Invitation

NCT Number: NCT07209995

Ultrasound Guided Retroclavicular Infraclavicular Versus Axillary Block as Regional Anesthesia in Obese Patients

The purpose of this study is to compare the analgesic outcomes (time to first analgesic request, total amount of analgesic consumption, and pain scores) following the ultrasound-guided retroclavicular infraclavicular approach and the axillary approach in obese patients.

Enrolling by Invitation

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Key information

Conditions

Achievement of High-quality Analgesia in Elbow Surgeries

Age range

21 year–45 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

faculty of medicine,zagazig university Egypt

Zagazig, 44519, Egypt

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Patients acceptance to share in the study.
  • Patients with ASA physical status I-II.
  • Obese patients (BMI 30-40 kg/m²) undergoing around and below elbow surgeries under regional anesthesia.
  • Patients requiring a single injection infraclavicular retroclavicular brachial plexus block or axillary block for around and below elbow surgeries.

Exclusion criteria

  • Patients with a history of allergic reactions or contraindications to local anesthetics.
  • Patients with significant comorbidities (e.g., severe cardiovascular, neurological, or musculoskeletal disorders).
  • Patients with a history of previous shoulder or clavicle surgery that may distort anatomy and affect the efficacy of the block.
  • Pregnant or breastfeeding women.
  • Patients with a history of systemic infections or skin infections in the area of the block.

Treatment and study plan

retroclavicular infraclavicular brachial plexus block for

Other

The patient will be placed supine, head facing the contralateral side. A high- frequency 13-6 MHz linear array transducer probe will be placed medial to the coracoid process below and perpendicular to the clavicle to obtain a short-axis view of the cords of the brachial plexus and the axillary vessels. The needle will be inserted in the supraclavicular fossa, approximately one cm posteriorly to the clavicle, and advanced in plane parallel to the probe. After passing the initial blind zone of about 2 cm caused by the clavicle's acoustic shadow, the needle tip will be continuously seen, until it appears posterior to the axillary artery. A single injection of the local an esthetic will be performed without needle repositioning unless paresthesia is elicited

axillary block

Other

The axillary nerve block is performed from behind the patient with the patient seated. The axillary nerve will be identified within the quadrilateral space by placing high frequency linear probe parallel to the long axis of the humeral shaft. The nerve was identified next to the circumflex artery

Primary outcomes

  1. Time to first analgesic request in each group

    Time frame: 24 hours postoperative

Secondary outcomes

  1. Block assessment and definition of successful block

    Time frame: 30 minutes after the block

  2. Imaging time

    Time frame: the time between probe application and insertion of the needle

  3. Needle time

    Time frame: the time between insertion of the needle and complete injection of local anesthetic

  4. -Procedure time

    Time frame: the summation of the imaging and needling times

  5. Pain intensity

    Time frame: basal, one, 2, 4, 8, 12, 16, 20 and 24 hours postoperative

    10-point NRS [(0 = no pain, 10 = worst imaginable pain), 1 - 3: Mild pain (nagging, annoying, slightly interfering with activities of daily living (ADLs), 4 - 6: Moderate pain (significantly interfering with ADLs, 7 - 10: Severe pain (disabling, unable to perform ADLs)]

  6. Total analgesia need

    Time frame: the first postoperative 24 hours

  7. Duration of the sensory block

    Time frame: first 24 hours postoperative

  8. Duration of the motor block

    Time frame: first 24 hours postoperative

  9. Incidence of block complications

    Time frame: first 24 h0urs postoperative

    hematoma formation or paresthesia or local anesthetic systemic toxicity.

Sponsors and collaborators

Lead sponsor

Zagazig University

Other Gov

Registry information

Official study title

Ultrasound Guided Retroclavicular Infraclavicular Versus Axillary Block as Regional Anesthesia in Obese Patients Undergoing Around and Below Elbow Surgeries: A Randomized Clinical Study

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Oct 7, 2025
Registry last updated
Dec 16, 2025

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.