Needle Nerve Contact in Ultrasound Guided Femoral Block
| Status: | Completed |
|---|---|
| Conditions: | Hospital, Neurology |
| Therapuetic Areas: | Neurology, Other |
| Healthy: | No |
| Age Range: | 18 - 65 |
| Updated: | 4/2/2016 |
| Start Date: | November 2011 |
| End Date: | March 2012 |
| Contact: | Ana Ruiz, MD |
| Email: | anaruiz@clinic.ub.es |
| Phone: | 0034932275558 |
Incidence of Intraneural Needle Insertion in Ultrasound Guided Femoral Block: Out of Plane Versus in Plane Approach
Ultrasound-guided femoral nerve block is a common regional anesthesia technique. The optimal
method of needle guidance (in-plane versus out-of-plane) with regards to the block efficacy
and avoidance of needle-nerve contact has not been established. In this study the
investigators tests the hypothesis that the incidence of needle-nerve contact is higher with
the needle insertion in an out-of-plane than with the in-plane approach.
method of needle guidance (in-plane versus out-of-plane) with regards to the block efficacy
and avoidance of needle-nerve contact has not been established. In this study the
investigators tests the hypothesis that the incidence of needle-nerve contact is higher with
the needle insertion in an out-of-plane than with the in-plane approach.
Fourty-four patients with hip fracture (American Society of Anesthesiologists physical
status 1-3) are being randomized to receive the femoral block with an out-of-plane (needle
inserted at a 45°-60° angle 1 cm caudal to the midpoint of the ultrasound probe just above
the femoral nerve) or an in-plane technique (needle inserted 0.5 cm from the side of the
probe lateral to the femoral nerve). The data collected includes the depth of needle
insertion at the endpoint before injection, response to nerve stimulation, distribution of
the injected volume in relation to the nerve (anterior vs posterior, the latter indicating
impalement), block efficacy at 20 minutes and 24 hours, and any signs of nerve injury).
status 1-3) are being randomized to receive the femoral block with an out-of-plane (needle
inserted at a 45°-60° angle 1 cm caudal to the midpoint of the ultrasound probe just above
the femoral nerve) or an in-plane technique (needle inserted 0.5 cm from the side of the
probe lateral to the femoral nerve). The data collected includes the depth of needle
insertion at the endpoint before injection, response to nerve stimulation, distribution of
the injected volume in relation to the nerve (anterior vs posterior, the latter indicating
impalement), block efficacy at 20 minutes and 24 hours, and any signs of nerve injury).
Inclusion Criteria:
- ASA physical status 1-3 patients
- Diagnosis of trochanteric or cervical hip fracture
- Hip replacement under spinal anesthesia
Exclusion Criteria:
- Patients under the age of 65 years or over the age of 90 years
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