Trial Evaluating Postop Pain and Muscle Strength Among Regional Anesthesia Techniques for Ambulatory ACL Reconstruction

Trial Evaluating Postop Pain and Muscle Strength Among Regional Anesthesia Techniques for Ambulatory ACL Reconstruction

Randomized Controlled Trial Evaluating Postoperative Analgesia and Muscle Strength Between Single Versus Continuous Adductor Canal Block for Ambulatory ACL Reconstruction.

Despite the apparent multifaceted benefit in differentiating blockade sites and duration of nerve blockade, the efficacy of continuous adductor canal blockade utilized specifically in ACL reconstruction has not been extensively studied. This study will test the hypothesis that the use of the adductor canal continuous nerve catheter will result in lower subjective pain scores on postoperative day 2 and improved quadriceps strength on postoperative day 1.

Study participants will be randomized to 2 groups: (1) continuous adductor canal nerve catheter or (2) long-acting single bolus adductor canal nerve block. Following random selection via random envelope selection patients will receive the following procedures. Both groups will receive ultrasound guided femoral nerve block with 20cc of 2% mepivacaine <20 minutes prior to in room time. Intraoperative care will consist of general anesthesia under the care of the attending anesthesiologist assigned to the patient. Induction will include a propofol bolus and placement of laryngeal mask airway. Intraoperative opioid should be limited to no more than 150mcg of fentanyl. Upon completion of wound closure, appropriate dressing placement, emergence from anesthesia and removal of LMA, patients to be taken to PACU. Once adequately awake and alert, Group 1 patients 1 will receive ultrasound guided adductor canal continuous nerve catheter using normal saline as bolus for placement, followed by initiation of 1/8% bupivacaine infusion through catheter at 8cc/h. Group 2 will receive ultrasound guided adductor canal nerve block with 10cc of 0.5% ropivacaine + 2mg dexamethasone (0. 5cc), keeping total injectate at 10.5cc to spare significant proximal spread to femoral nerve14. After adequate instruction including catheter education (if applicable) patients are to be discharged home.

Ultrasound guided femoral nerve block with 20cc of 2% mepivacaine <20 minutes prior to in room time. Intraoperative patients will undergo initiation of general anesthesia under the care of the attending anesthesiologist assigned to the patient. Induction will include a propofol bolus and placement of laryngeal mask airway. Intraoperative opioid should be limited to no more than 150mcg of fentanyl. Upon completion of wound closure, appropriate dressing placement, emergence from anesthesia and removal of LMA, patients to be taken to PACU. Once adequately awake and alert this group will receive ultrasound guided adductor canal continuous nerve catheter using normal saline bolus followed by 1/8% bupivacaine infusion through catheter at 8cc/h.

Ultrasound guided femoral nerve block with 20cc of 2% mepivacaine <20 minutes prior to in room time. Intraoperative patients will undergo initiation of general anesthesia under the care of the attending anesthesiologist assigned to the patient. Induction will include a propofol bolus and placement of laryngeal mask airway. Intraoperative opioid should be limited to no more than 150mcg of fentanyl. Upon completion of wound closure, appropriate dressing placement, emergence from anesthesia and removal of LMA, patients to be taken to PACU. Once adequately awake and alert this group will receive ultrasound guided adductor canal nerve block with 10cc of 0.5% ropivacaine and 2 mg dexamethasone (0. 5cc), keeping total injectate at 10.5cc to spare significant proximal spread to femoral nerve.

normal saline as bolus for placement, followed by initiation of 1/8% bupivacaine infusion through adductor canal catheter at 8cc/h

10cc of 0.5% ropivacaine + 2 mg dexamethasone (0. 5cc), keeping total injectate at 10.5cc to spare significant proximal spread to femoral nerve

Subjective Postoperative Pain Scores After Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to Preoperative Femoral Nerve Block Plus Postop Saphenous Nerve Block at 48 Hours After Discharge From PACU.

Subjective subjective postoperative pain scores at POD 2 of preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to preoperative femoral nerve block plus postoperative saphenous nerve block at 48 hours after discharge from PACU using Subjective Numeric Pain Scale score (on an 11 point scale when 0 is no pain and 10 is worst pain).

Quadriceps Strength of on POD 1 of Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block at 48 Hours After Discharge From PACU

Quadriceps strength on POD 1 of preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to preoperative femoral nerve block plus postoperative saphenous nerve block using Straight Leg Raise Tests, 0-5/5 scale, and knee extension, 0-5/5 scale. On both scales (straight leg raise test and knee extension) 0 indicates the minimum value (low muscle contraction/no movement) and 5 indicates the maximum (normal muscle contraction /pt holds position against pressure).

Subjective Pain Scores on POD 1 of Patients Receiving (1) Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to (2) Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block

Subjective pain scores on POD 1 of patients receiving (1) preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to (2) preoperative femoral nerve block plus postoperative saphenous nerve block using Subjective Numeric Pain Scale score (on an 11 point scale when 0 is no pain and 10 is worst pain).

Total Postop Opioid Consumption of Patients Receiving (1) Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to (2) Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block.

Total postop opioid consumption measured by total pain pills on POD 2 and 3 of patients receiving (1) preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to (2) preoperative femoral nerve block plus postoperative saphenous nerve block.

Quadriceps Strength on POD Week 6- Pts Receiving (1) Long-acting Single Bolus Adductor Canal Nerve Block Comparied to (2) Continuous Adductor Canal Nerve Catheter.

Quadriceps strength on POD week 6- pts receiving (1) long-acting single bolus adductor canal nerve block comparied to (2) continuous adductor canal nerve catheter using Straight Leg Raise Tests, 0-5/5 scale, and knee extension, 0-5/5 scale. On both scales (straight leg raise test and knee extension) 0 indicates the minimum value (low muscle contraction/no movement) and 5 indicates the maximum (normal muscle contraction /pt holds position against pressure).

Physical Therapy Participation With a Subjective Assessment of Participant Ability to Participate in PT (Full, Partial, None)

Subjective Postoperative Pain Score at Post Operative Week 6 of Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block

Subjective postoperative pain score at post operative week 6 of preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to preoperative femoral nerve block plus postoperative saphenous nerve block using Subjective Numeric Pain Scale score with and without activity (on an 11 point scale when 0 is no pain and 10 is worst pain).

Evaluation of Ambulation at Post Operative Week 6 Assessing Independently vs Assistance, With or Without Pain

Subjective assessment of experience with analgesia at post operative week 6 using rating of below expectations; met expectations; exceeded expectations

Subjective Pain Scores on POD 3 of Patients Receiving (1) Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to (2) Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block

Subjective pain scores on POD 3 of patients receiving (1) preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to (2) preoperative femoral nerve block plus postoperative saphenous nerve block using Subjective Numeric Pain Scale score (on an 11 point scale when 0 is no pain and 10 is worst pain).

Total Postop Opioid Consumption of Patients Receiving (1) Preoperative Femoral Nerve Block Plus Postoperative Continuous Adductor Canal Nerve Catheter Compared to (2) Preoperative Femoral Nerve Block Plus Postoperative Saphenous Nerve Block.

Total postop opioid consumption measured by total pain pills on POD 1 of patients receiving (1) preoperative femoral nerve block plus postoperative continuous adductor canal nerve catheter compared to (2) preoperative femoral nerve block plus postoperative saphenous nerve block.

Inclusion Criteria: Age 14 and older Patients who are scheduled to undergo an ACL reconstruction with patella or allograft Patient does not have a contraindication to receiving regional anesthesia Exclusion Criteria: Allergy to local anesthetics, dexamethasone, or adhesive tape Patients undergoing hamstring graft for ACL Preexisting infection at site of needle insertion Immunocompromised patients Preexisting sensory or motor deficit in operative extremity Patient on chronic opioid treatment. Patient having a revision of previous ACL reconstruction. Pregnancy and lactating women

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