Regional Anesthesia, Femoral Nerve Block
Conditions
Keywords
Knee surgery
Brief summary
In this study, we will be comparing two approaches to the femoral block. The first or classical approach and one that is the most popular in our institution is used by combining ultrasound guidance and neurostimulator to do the block. The second is performed with the ultrasound alone aiming at the inferolateral aspect of the femoral artery with the needle and injecting. The primary endpoint of the study is the sensitive cutaneous block distribution using both techniques.
Interventions
PROCEDUREFemoral nerve block using Ultrasound and neurostimulator
PROCEDUREFemoral nerve block using Ultrasound
DRUGRopivacaine 0.5%
Ropivacaine 0.5% (20cc total) will be injected for the performance of the block in the two arms of the study.
Sponsors
Maisonneuve-Rosemont Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients scheduled for an elective surgery for which the anesthesiologist planned to do a single shot or continuous femoral nerve block.
Exclusion criteria
* Any contraindication to the femoral nerve block (coagulopathy, infection, pre-existing neuropathy, local anesthetic allergy and refusal of local anesthesia). * Refusal to participate in the study * Inability to understand or communicate the effect of local anesthesia secondary to the femoral nerve bloc.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sensitive cutaneous block distribution area for the two techniques | 45 minutes | After performance of a femoral nerve block, ice will be applied on the skin to plot the anesthetized area at times 15, 30 and 45 mn. The sensation will be compared on a scale from 0 (no sensation) to 2 (no anesthesia) with the contralateral leg. An area in cm2 will be calculated for each of the patients and the two techniques will then be compared. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Ease of ultrasound visualization of the femoral nerve | 45 minutes | This will be assessed by the anesthesiologist making the femoral nerve block from a scale of 1 (no visualization) to 10 (excellent visualization). |
| Ease of ultrasound visualization of the femoral artery | 45 minutes | This will be assessed by the anesthesiologist making the femoral nerve block from a scale of 1 (no visualization) to 10 (excellent visualization). |
| Numbers of needle redirection | 45 minutes | The number of time for each patients using either techniques that the needle will have been withdrawn. |
| Time of block completion | 45 minutes | Time recorded from the end of the cutaneous local anesthetic injection to the end of the 20cc injection of the 0.5% Ropivacaine (time of block completion) |
| Paresthesia | 45 minutes | Presence or absence of the sensation of electrical shock felt by the patient in the territory of the femoral nerve at any point while performing the block |
| Patient Satisfaction | 45 minutes | Satisfaction expressed by the patient after the completion of the femoral nerve block using a scale from 1 to 4. |
| Vascular puncture | 45 minutes | Presence or absence of blood return at anytime in the tubing while performing the block. |
Countries
Canada
Contacts
Primary ContactIssam Tanoubi, MD
Backup ContactCédric Godbout-Simard, MD
Outcome results
None listed