• Lauren A Sullivan, Vicki L Campbell, Steven V Radecki, and Craig B Webb.
• Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Colorado State University, Fort Collins, CO 80523, USA. lauren.sullivan@colostate.edu
• J Vet Emerg Crit Care (San Antonio). 2011 Dec 1; 21 (6): 633-8.

ObjectiveTo compare tissue oxygen saturation in ovariohysterectomized dogs recovering postoperatively on room air versus nasal oxygen insufflation.DesignProspective clinical study.SettingUniversity teaching hospital.AnimalsTwenty dogs undergoing ovariohysterectomy.InterventionsDogs were randomized to breathe either room air or 100 mL/kg/min of nasal oxygen insufflation for 2 hours postoperatively. Tissue oxygen saturation (StO(2)) was evaluated at 2 mm and 20 mm lateral to the surgical incision, as well as in the inguinal region using a noninvasive tissue oximeter.Measurements And Main ResultsIn dogs recovered on nasal oxygen insufflation (n = 10), tissue oxygen saturation was significantly higher--20 mm from the surgical site (88.44 ± 2.50%, P = 0.02) and in the inguinal region (83.56 ± 1.91%, P = 0.032)-- compared to dogs recovered on room air (n = 10, 79.11% ± 2.50 and 77.12% ± 1.91, respectively).ConclusionsIn ovariohysterectomized dogs, oxygen supplementation for 2 hours postoperatively improves tissue oxygen saturation 20 mm adjacent to the linea alba and in the inguinal region. Oxygen supplementation in postoperative dogs is an inexpensive and easily applicable method to improve tissue oxygen saturation.© Veterinary Emergency and Critical Care Society 2011.

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