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Erector Spinae Versus Surgically Placed Pain Catheters for Thoracic Outlet Decompression

Abstract

Background

Perioperative care after surgery for thoracic outlet syndrome (TOS) involves multimodal pain control. Pain catheters with bupivacaine infusion are a modality to minimize perioperative narcotic use. Our study aims to compare surgically placed pain catheters (SP) with erector spinae pain catheters (ESP) placed by the anesthesia pain service.

Methods

Retrospective review of a prospectively maintained surgical TOS database identified patients undergoing transaxillary first rib resection (FRR) who had either SP or ESP placed for pain control. Patients were matched for age and gender. Data collected included demographics, operative details, and perioperative pain medication use. Narcotic pain medication doses were converted to milligram morphine equivalents (MME) for comparison between groups. Pain medications were collected for several time points: intraoperatively, for each post-operative day (POD), and for the entire hospital stay.

Results

Eighty-eight total patients were selected for comparison: 44 patients in the SP and ESP groups. Patients in each group did not differ with regards to age, BMI, gender, diagnosis, or comorbidities. There were no differences in preoperative narcotic use, preoperative pain score, or QuickDASH score. All patients underwent FRR. Concurrent cervical rib resection was performed in 6.8% SP and 6.8% ESP patients (p=1.00), pectoralis minor tenotomy in 34.1% SP and 29.5% ESP patients (p=0.65), and venogram in 31.8% SP and 31.8% ESP patients (p=1.00). Mean OR time was 90.0 minutes in SP and 105.3 minute in ESP cases (p=0.15). Mean length of stay was 1.9 days for SP and 1.8 days for ESP patients (p=0.56). There were no significant differences in intraoperative narcotics dosing in MME (SC: 22.1 vs ESP: 25.3, p=0.018). On POD 0, there were no differences in total narcotics dosing (MME) (SC: 112.0 vs ESP: 100.7, p=0.59), or in the use of acetaminophen, NSAIDS, or muscle relaxants. A similar trend in narcotics dosing was observed on POD 1 (SP: 58.6 vs ESP: 69.7, p=0.43), and POD 2 (SP: 23.5 vs ESP: 71.3, p=0.23). On POD 1, there was a higher percentage of SP patients taking NSAIDs (63.6% vs 40.9%, p=0.024), however, this difference was not observed on POD 2. There were no differences in acetaminophen or muscle relaxant use on POD 1 or 2. Total hospital stay MME was similar between groups (SC: 215.9 vs ESP: 250.9, p=0.23) CONCLUSION: Pain catheters with bupivacaine infusions are helpful adjuncts in postoperative pain control after FRR for TOS. This study compares SP to ESP, and demonstrates no difference in narcotics use between SP and ESP groups. SC should be used for pain control in facilities which do not have an anesthesia pain service available for ESP placement.

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