Local Infusion of Ropivacaine for Post-Op Pain Control After Osseocutaneous Free Flaps

Summary

Head and neck oncologic surgery often requires the use of free tissue transfer, or microvascular reconstruction, to reconstruct defects created by tumor resections. Although there are several techniques for the reconstruction of defects, resection of large tumors leave defects that require the transfer of vascularized tissue from one part of the body to repair the defect. For example, the removal of a segment of diseased mandible requires free tissue transfer containing the component parts - skin, muscle, and bone - to reconstruct the deficit created by the resection of the tumor. Over the years, microvascular surgeons have focused their attention on maximizing the success of these technically difficult surgeries. However, now, with free flap reconstruction rates in excess of 95%, surgeons are afforded the opportunity to turn their focus toward the morbidities associated with these surgeries. While much has been published about donor site wound healing, pain control in the post-operative period has largely been neglected in the head and neck reconstruction literature. Systemic analgesia with opioids is standard of care, which has been shown to lead to increased confusion, significantly increased length of stay and increased risk of pulmonary complications. In addition, it has been shown that early mobilization and optimal wound care can decrease donor site morbidity. In this study the clinical team aims to better control donor site pain utilizing local, targeted analgesia to relieve pain at the donor site for osseocutaneous free-flaps. To reduce confounding and bias, the study will be a double-blind prospective randomized placebo controlled trial wherein patients undergoing osseocutaneous free flap surgery will be randomized to receive continuous infusion of ropivacaine or normal saline (placebo) via local continuous infusion catheter, which will be placed intraoperatively at the time of donor site closure. Patients' pain will be monitored for the first 48hrs after surgery. Donor site and global pain at rest will be evaluated every 8 hours for the first two postoperative days using a visual analogue pain scale (VAS). Essentially, there is a 100 millimeter line drawn on a piece of paper, with "no pain" marking the left end of the line and "worst pain" marking the right end of the line. Subjects mark with a pen along the line where pain is felt fits along that continuum. A researcher then measures how far along the line that mark is placed and then it is recorded. Median daily opiate use via PCA will also be tracked. Donor site-specific range of motion and strength will be assessed with a formal physical therapy evaluation on post-operative day 2 or soonest non-holiday weekday. Information on patient satisfaction, time to ambulation, and length of stay will also be collected. Subgroup analysis will be performed.

Timeline

Start

2017-09-13

Primary completion

2019-09-30

Completion

2019-09-30

Publications

• Background Blumenthal S, Dullenkopf A, Rentsch K, Borgeat A. Continuous infusion of ropivacaine for pain relief after iliac crest bone grafting for shoulder surgery. Anesthesiology. 2005 Feb;102(2):392-7. doi: 10.1097/00000542-200502000-00023.
• Background Gerbershagen HJ, Aduckathil S, van Wijck AJ, Peelen LM, Kalkman CJ, Meissner W. Pain intensity on the first day after surgery: a prospective cohort study comparing 179 surgical procedures. Anesthesiology. 2013 Apr;118(4):934-44. doi: 10.1097/ALN.0b013e31828866b3.
• Background Oderda GM, Said Q, Evans RS, Stoddard GJ, Lloyd J, Jackson K, Rublee D, Samore MH. Opioid-related adverse drug events in surgical hospitalizations: impact on costs and length of stay. Ann Pharmacother. 2007 Mar;41(3):400-6. doi: 10.1345/aph.1H386. Epub 2007 Mar 6.
• Background Singh K, Samartzis D, Strom J, Manning D, Campbell-Hupp M, Wetzel FT, Gupta P, Phillips FM. A prospective, randomized, double-blind study evaluating the efficacy of postoperative continuous local anesthetic infusion at the iliac crest bone graft site after spinal arthrodesis. Spine (Phila Pa 1976). 2005 Nov 15;30(22):2477-83. doi: 10.1097/01.brs.0000186323.11285.b1.
• Roof S, Ferrandino R, Eden C, Khelemsky Y, Teng M, Genden E, DeMaria S Jr, Miles BA. Local infusion of ropivacaine for pain control after osseous free flaps: Randomized controlled trial. Head Neck. 2021 Apr;43(4):1063-1072. doi: 10.1002/hed.26562. Epub 2021 Feb 23.

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