Assessing the Enhanced Precision: The Value of Impedance in Ultrasound-Guided Nerve Blocks (Axillary, Interscalene, Popliteal Sciatic), an Exploratory Prospective Observational Study

NCT06620471 | Recruiting

• 1 other identifier: LAUGPNB5372
• Study Type: observational
• Target: 100
• Locations: 1 country
• Sites: 1

Brief Summary

Impedance can have an impact on nerve block during loco-regional anesthesia, particularly when using techniques such as nerve stimulation or ultrasound guidance to locate and block specific nerves. Impedance refers to the resistance to electrical current flow within tissue, and it can affect the ability to stimulate nerves or visualize them using ultrasound. The aim of this research is to assess the impedance across different tissue type during an axillary peripheral nerve block (skin, fat, fascia, muscle, nerve). The results of this study would help clinicians performing nerve block to enhance the precision of needle placement, thus increase the success rate of nerve block and reduce adverse events such as intraneural or intravascular injections.

Conditions

Impedance; Axillary Nerve Block; Ultrasound-Guided Nerve Blocks; Interscalene Nerve Block; Popliteal Sciatic Nerve Block

Outcome Measures

Primary Outcomes (1)

• Assess the impedance across different type of tissue during axillary nerve block

  Measure impedance at different locations, different tissue types and different distances from the nerve (as recorded on the nerve stimulator)

  3 months

Eligibility Criteria

• Age: 18 Years - 90 Years
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

community sample

You may qualify if:

• Individuals aged 18 years to 90 years old
• No infection at the injection site
• Patient signed the study consent form
• No contraindications for nerve block
• No allergies to any of the drugs used
• Patient able to communicate effectively

You may not qualify if:

• Patients with bleeding disorders or undergoing anticoagulation therapy
• Pregnant patients
• Patients with mental incapacity
• Any medical conditions posing severe risks during the procedure

Sponsors & Collaborators

• Lebanese American University: lead

Study Sites (1)

Lebanese American University Rizk Hospital

Beirut, Beyrouth, Lebanon

RECRUITING

Central Study Contacts

Assaf, M.D. anesthesiology

CONTACT

+961 3 970 762; georges.assaf@laumcrh.com

Michel Youssef Akiki, M.D. anesthesiology resident

CONTACT

+ 961 71159586; michel.akiki@lau.edu

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: M.D. Anesthesiologist

Study Record Dates

• First Submitted: September 21, 2024
• First Posted: October 1, 2024
• Study Start: September 14, 2024
• Primary Completion: November 1, 2025
• Study Completion: December 1, 2025
• Last Updated: July 30, 2025

Record last verified: 2024-09

Locations

LE (1)