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Evaluation of short-term outcome after lung lobectomy for resection of primary lung tumors via video-assisted thoracoscopic surgery or open thoracotomy in medium- to large-breed dogs

Philipp D. Mayhew BVM&S, DACVS1,2, Geraldine B. Hunt BVSc, MVetClinStud, PhD3, Michele A. Steffey DVM, DACVS4, William T. N. Culp VMD, DACVS5, Kelli N. Mayhew VMD, DACVS6, Mark Fuller DVM7, Lynelle R. Johnson DVM, PhD, DACVIM8, and Peter J. Pascoe BVSc, DACVA9
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  • 1 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 2 Department of Clinical Studies-Philadelphia, Matthew J. Ryan Veterinary Hospital, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104
  • | 3 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 4 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 5 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 6 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 7 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 8 Departments of Surgical and Radiological Sciences and Epidemiology, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616
  • | 9 Departments of Surgical and Radiological Sciences and Medicine, School of Veterinary Medicine, University of California-Davis, Davis, CA 95616

Abstract

Objective—To describe clinicopathologic features of dogs that underwent lung lobectomy for resection of primary lung tumors via video-assisted thoracoscopic surgery (VATS) or open thoracotomy (OT) and to compare short-term outcomes for dogs following these procedures.

Design—Retrospective cohort study.

Animals—46 medium- to large-breed dogs with primary lung tumors.

Procedures—Medical records of dogs that underwent a lung lobectomy via VATS (n = 22) or OT (24) for resection of primary lung tumors between 2004 and 2012 were reviewed. Dogs were included if they weighed > 10 kg (22 lb) and resection of a primary lung tumor was confirmed histologically. Tumor volumes were calculated from preoperative CT scans where available. Surgical time, completeness of excision, time in the ICU, indwelling thoracic drain time, postoperative and total hospitalization time, incidence of major complications, and short-term survival rate were evaluated.

Results—VATS was performed with a 3-port (n = 12) or 4-port (10) technique and 1-lung ventilation (22). In 2 of 22 (9%) dogs, VATS was converted to OT. All dogs survived to discharge from the hospital. There were no significant differences between the VATS and OT groups with regard to most variables. Surgery time was significantly longer for VATS than for OT (median, 120 vs 95 minutes, respectively).

Conclusions and Clinical Relevance—In medium- to large-breed dogs, short-term outcomes for dogs that underwent VATS for lung lobectomy were comparable to those of dogs that underwent OT. Further studies are required to evaluate the effects of surgical approach on indices of postoperative pain and long-term outcomes.

Contributor Notes

Address correspondence to Dr. Philipp Mayhew (philmayhew@gmail.com).