Quadriceps Muscle Weakness, Adductor Muscle Weakness, Fall Risk
Conditions
Brief summary
Our objective was to determine if an ultrasound guided ACB can preserve quadriceps strength, thus minimizing weakness of knee extension compared with ultrasound guided femoral nerve block. Our primary outcome was the percent of maximum voluntary isometric contraction (MVIC) of knee extension preserved at 30 mins after either an ACB or FNB. Secondary outcomes included MVIC of knee extension at 60 min, hip adduction at 30 and 60 mins, and assessment of fall risk with the Berg Balance Scale (BBS) at 30 minutes.
Interventions
Sponsors
St. Luke's-Roosevelt Hospital Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
Inclusion criteria
* Adults (\>18yrs) * ASA 1-2
Exclusion criteria
* BMI \>30 * Allergy to local anesthetics * Pre-existing gait disturbance * Pre-existing neuropathy
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Percent of maximum voluntary isometric contraction (MVIC) of knee extension preserved at 30 mins after either an ACB or FNB | At 30 minutes |
Secondary
| Measure | Time frame |
|---|---|
| Percent of maximum voluntary isometric contraction (MVIC) of knee extension preserved at 60 mins after either an ACB or FNB | At 60 minutes |
| Percent of maximum voluntary isometric contraction (MVIC) of hip adduction preserved at 30 mins after either an ACB or FNB | At 30 minutes |
| Percent of maximum voluntary isometric contraction (MVIC) of hip adduction preserved at 60 mins after either an ACB or FNB | At 60 minutes |
| Assessment of fall risk with the Berg Balance Scale (BBS) at 30 minutes after the first nerve block. | At 30 minutes |
Countries
United States
Outcome results
None listed