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  • Title: Surgical management and outcome of dogs with primary spontaneous pneumothorax: 110 cases (2009-2019).
    Author: Dickson R, Scharf VF, Michael AE, Walker M, Thomson C, Grimes J, Singh A, Oblak M, Brisson B, Case JB.
    Journal: J Am Vet Med Assoc; 2021 Jun 01; 258(11):1229-1235. PubMed ID: 33978438.
    Abstract:
    OBJECTIVE: To describe surgical management and associated outcomes for dogs with primary spontaneous pneumothorax. ANIMALS: 110 client-owned dogs with primary spontaneous pneumothorax that underwent surgical management. PROCEDURES: Medical records at 7 veterinary teaching hospitals were reviewed. Data collected included signalment, history, clinical signs, radiographic and CT findings, surgical methods, intraoperative and postoperative complications, outcomes, and histopathologic findings. Follow-up information was obtained by contacting the referring veterinarian or owner. RESULTS: 110 dogs were included, with a median follow-up time of 508 days (range, 3 to 2,377 days). Ninety-nine (90%) dogs underwent median sternotomy, 9 (8%) underwent intercostal thoracotomy, and 2 (2%) underwent thoracoscopy as the sole intervention. Bullous lesions were most commonly found in the left cranial lung lobe (51/156 [33%] lesions) and right cranial lung lobe (37/156 [24%] lesions). Of the 100 dogs followed up for > 30 days, 13 (13%) had a recurrence of pneumothorax, with median time between surgery and recurrence of 9 days. Recurrence was significantly more likely to occur ≤ 30 days after surgery, compared with > 30 days after surgery. Recurrence > 30 days after surgery was rare (3 [3%]). No risk factors for recurrence were identified. CONCLUSIONS AND CLINICAL RELEVANCE: Lung lobectomy via median sternotomy resulted in resolution of pneumothorax in most dogs with primary spontaneous pneumothorax. Recurrence of pneumothorax was most common in the immediate postoperative period, which may have reflected failure to identify lesions during the initial thoracic exploration, rather than development of additional bullae.
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