Monitoring of Intensity of Stimulation and Injection Pressure in US Guided Peripheral Nerve Block According to Anatomic Needle Type Position

University Hospital, Montpellier1,500 enrolled

Overview

The purpose of the study is define the minimal intensity of stimulation range at which the needle is closed to the nerve without penetrating its surface (epineurium layer) in ultrasound guided peripheral nerve blockade

The needle is placed at the target under ultrasound guidance the nerve stimulator is turned on and the intensity increased until motor response is observed the Minimum Intensity Observation (MIS) is recorded before injection of local anesthetic

Study Type

INTERVENTIONAL

Allocation

Purpose

SUPPORTIVE_CARE

Masking

NONE

Enrollment

1,500

Conditions

Orthopedic Surgery

Interventions

Measure of the minimal intensity of stimulation during ultrasound guided peripheral nerve blockadePROCEDURE

A needle is placed at the target under ultrasound guidance, the nerve stimulator is turned on and the intensity increased until motor response is observed. The Minimal Intensity of Stimulation is recorded before injection of local anesthetic

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patient who need a Orthopedic surgery * Peripheral nerve block * More or equal to 18 years old * I to III ASA classification status * Benefit from an insurance regimen Exclusion Criteria: * severe coagulopathy * allergy to local anesthetics * local cutaneous lesion

Locations (9)

University Hospital of Annecy

Annecy, France

University hospital of Bordeaux

Bordeaux, France

University hospital of Clermont-Ferrand

Clermont-Ferrand, France

University Hospital of Colmar

Colmar, France

Outcomes

Primary Outcomes

Measurement of Minimum Intensity Stimulation

Minimal Intensity Stimulation (MIS) was measured Using a specific nerve stimulator (modified HNS 12 B. BRAUN, Melsungen, Germany) ; the value are noted in mA. \[0- 1.5\]. The time frame is only related to procedure of PNB. In other term, the period of assessment should be estimated between 2 minutes and 20 minutes.

Time frame: estimated between 2 minutes and 20 minutes.

Secondary Outcomes

tissure pressure at the target

Tissue pressure at the target was measured Using a specific pressure sensor (compuflow pump Milestone Scientific, Livingston, NJ, USA) ; the value are noted in mm Hg. \[0- 900\]. from beginning to end of ultrasound guided peripheral nerve blockade

Time frame: estimated between 2 minutes and 20 minutes.

Data from ClinicalTrials.gov

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