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Clinical Trial Summary

Femoroacetabular impingement is a pathologic process within the hip joint that results from a mechanical discord between the femoral head and neck and the acetabulum that results in chronic hip pain, hip labral tears and early progression of osteoarthritis of the hip.1, 2 Historically an open surgical hip dislocation was performed to treat patients with this condition, however with recent advances in arthroscopy, patients more commonly now undergo arthroscopic hip surgery. From a pain management standpoint, previous attempts to provide peri-operative analgesia included intraarticular or portal analgesic injections. More recently, regional anesthesia techniques are being employed to provide more reliable and longer lasting post-operative pain control.3, 4 Currently, there are several local anesthetics available for regional anesthesia. However, they only provide an average of 12-18 hours of post-operative pain control following a single injection.5 Bupivacaine is a local anesthetic that has been used for many years by multiple routes to control post-operative pain. A new formulation of the medication prolongs the release of the active ingredient after a single injection and has been shown to result in up to 72 hours of post-operative analgesia.6, 7 To the investigator's knowledge, there has not been any studies in the literature comparing a historical control local anesthetic to this new formulation of liposomal bupivacaine via a fascial iliaca regional soft tissue infiltration blockade to provide post operative pain control following hip arthroscopy.


Clinical Trial Description

This study is a double-blinded prospective randomized control trial. Patients will be randomized in a 1:1 ratio to either the liposomal bupivacaine group versus bupivacaine alone. Randomization assignment will be determined using a computer program based on random number generation, with an equal number of treatments in blocks of 2, 4, and 6 patients. The order of the blocks will be randomized as well. Treatment assignments will be concealed in sequentially numbered opaque sealed envelopes (SNOSE). The anesthesia provider administering the medication will not be an investigator of this study and will be allowed to know what medication that is administered to ensure safety with regards to any potential medication interactions the study medication may have with any other medication or anesthesia provided during the operation. This study will be double blinded by having the associate investigator (anesthesia resident/fellow) that will be conducting the post-operative pain score, Defense and Veterans Pain Rating Scale (DVPRS) evaluations, un-aware of which medication each patient received during the fascial iliac regional soft tissue infiltration blockade. The anesthesia resident/fellow will remain blinded to which medication the patient received by not having access to the patients electronic medical record, did not participate in the procedure, and will not have access to the database created by the orthopaedics residents where this information will be entered. The treating surgeons will also be blinded to which medication was administered by not being present during the randomization process and will only be made aware of which medication the patient received after the final two-week postoperative pain assessment and oral pain medication pill count, after which patient study participation will be concluded. The success of blinding will be evaluated by asking the patient, anesthesia resident/fellow and treating surgeon to guess their treatment assignment the day of surgery, during the pain score collection process and at the final two-week routine follow up appointment. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02947178
Study type Interventional
Source Walter Reed National Military Medical Center
Contact
Status Completed
Phase Phase 4
Start date March 1, 2016
Completion date March 1, 2017

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