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  • Title: Rib-sparing scalenectomy for neurogenic thoracic outlet syndrome: Early results.
    Author: Johansen K.
    Journal: J Vasc Surg; 2021 Jun; 73(6):2059-2063. PubMed ID: 33340695.
    Abstract:
    OBJECTIVE: Neurogenic thoracic outlet syndrome (NTOS) is no longer either "controversial" or "disputed"; however, its optimal surgical management remains unclear. Many thoracic outlet decompression procedures are performed by first rib resection, usually via a transaxillary route. METHODS: A retrospective review of a prospectively maintained NTOS database was performed. Patients with NTOS associated with a cervical rib and those with recurrent NTOS were excluded from the present analysis. All study patients had satisfied a 5-point clinical diagnostic protocol and had experienced a positive response to a local anesthetic scalene block. Surgical decompression included anterior, minimus, and middle scalenectomy and brachial plexus neurolysis via a supraclavicular incision and pectoralis minor tenotomy through a small vertical infraclavicular incision. No first ribs were excised. All the patients had completed QuickDASH (11-item version of the Disability of the Arm, Shoulder, and Hand questionnaire) preoperatively and at 3 or 6 months postoperatively. RESULTS: From 2011 to 2019, 504 thoracic outlet decompression procedures had been performed in 442 patients. The average operative time was 1.15 hours, and the average hospital length of stay was 1.05 days. Major complications, including intraoperative arterial injury, postoperative wound hematoma requiring reoperation, and chylothorax, occurred in 7 patients (1.4%). All but 2 patients (99.6%) had symptomatic improvement. Using a more rigorous definition of operative success of ≥50% improvement in the 3- or 6-month QuickDASH score, 458 rib-sparing NTOS operations (90.9%) were successful. In contrast to the mean preoperative QuickDASH score of 62.6, the average postoperative QuickDASH score was 25.2 (P = .001). CONCLUSIONS: These results suggest that (1) adherence to a rigorous preoperative diagnostic regimen, including performance of a scalene block, ensures, at the least, that surgery for NTOS can be successfully restricted to patients actually with the condition; (2) fibrotic, contracted scalene muscles are the cause of NTOS; (3) the first rib does not require removal for successful surgical treatment of NTOS; and (4) 90% of the patients so treated can expect significant early symptomatic and functional improvement.
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