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

Assessing the Enhanced Precision: The Value of Impedance in Ultrasound-Guided Nerve Blocks, an Exploratory Prospective Observational Study

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT06620471

Enrollment

100

Registered

2024-10-01

Start date

2024-06-10

Completion date

2026-12-01

Last updated

2026-05-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

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

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 proximity). 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.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to 90 Years

Healthy volunteers

Inclusion criteria

* 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

Exclusion criteria

* Patients not meeting the inclusion criteria * Patients with bleeding disorders or undergoing anticoagulation therapy * Pregnant patients * Patients with mental incapacity * Any medical conditions posing severe risks during the procedure

Design outcomes

Primary

Measure	Time frame	Description
Assess the impedance across different type of tissue during axillary, popliteal and interscalene nerve block	Two years	Measure impedance at different locations, different tissue types and different distances from the nerve (as recorded on the nerve stimulator)

Countries

Lebanon

Contacts

CONTACTAssaf, M.D. anesthesiology

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

CONTACTMichel Youssef Akiki, M.D. anesthesiology resident

michel.akiki@lau.edu+ 961 71159586

Outcome results