Comparison between effects of adductor canal block and femoral nerve block on early postoperative course in total knee arthroplasty: A prospective double-blind, randomized controlled study

Ultrasound-guided adductor canal block versus femoral nerve block for arthroscopic anterior cruciate ligament repair under general anesthesia

“…FNB is a very commonly used technique of analgesia for postoperative pain relief for patients undergoing knee and below knee surgery, but as it causes weakness of quadriceps muscle, patient fall risk increases impairing early rehabilitation. [ 3 4 16 ] Hence, with FNB there always is a compromise between goals of adequate pain relief and muscle strength. Motor-sparing effect of block becomes important in the context of day care surgery.…”

“…Conventionally, FNB has remained the mainstay for postoperative analgesia for knee surgeries with good pain control and patient satisfaction. [ 15 16 17 18 ] While ACB is highly advocated for day care surgeries, we decided to study it in arthroscopic ACLR, which in our institute is an inpatient procedure. The primary outcomes of our study, i.e., quadriceps motor strength was measured by determining patient's ability to perform SLR test with the patient in a supine position.…”

“…[ 13 ] On POD1, quadriceps muscle strength was assessed with the help of TUG test. [ 16 ] The duration of motor weakness with FNB was up to POD1. This is in congruence with other studies.…”

“…This is in congruence with other studies. [ 13 16 ] Therefore, FNB may not be the preferred technique of choice for day care knee scopies. ACB, although claimed to be a pure sensory block, may at times result in partial motor weakness.…”

Continuous femoral nerve block is more effective than continuous adductor canal block for treating pain after total knee arthroplasty

“…[14] In 3 separate studies comparing ACB and FNB with regard to morphine consumption administered by way of patient-controlled analgesia (PCA) pumps, there were no significant differences between the 2. [13,14,18]…”