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J Vet Emerg Crit Care (San Antonio) · Sep 2014
Noninvasive continuous positive airway pressure delivered using a pediatric helmet in dogs recovering from general anesthesia.
- Francesco Staffieri, Antonio Crovace, Valentina De Monte, Paola Centonze, Giulio Gigante, and Salvatore Grasso.
- Dipartimento dell'Emergenza e dei Trapianti d'Organo, Sezione di Cliniche Veterinarie e Produzioni Animali.
- J Vet Emerg Crit Care (San Antonio). 2014 Sep 1; 24 (5): 578-85.
ObjectiveTo evaluate the feasibility and efficacy of noninvasive continuous positive airway pressure (CPAP) administered with a pediatric helmet in healthy dogs recovering from general anesthesia.DesignRandomized, cross-over, clinical study.SettingUniversity teaching hospital.AnimalsFifteen healthy female, client-owned dogs recovering from general anesthesia following elective ovariohysterectomy.InterventionsAll dogs received the same standardized anesthetic protocol (acepromazine, morphine, propofol, and isoflurane in oxygen). After extubation, a pediatric helmet was placed on all dogs and connected to a venturi valve supplied with medical air. In all patients, the gas flow was set to 50 L/minute and the FiO2 to 0.21. Dogs received the following sequence of treatments, each lasting 20 minutes: 0 CPAP (pre-CPAP), CPAP of 5 cm H2 O (CPAP), and again 0 CPAP (post-CPAP).Measurements And Main ResultsDuring the entire study, the following data were collected: pressure and FiO2 inside the helmet, mean arterial pressure, respiratory rate, heart rate, sedation score (0 = awake, 10 = deep sedation), and tolerance to the helmet (0 = excellent, 4 = poor). At the end of each phase, an arterial blood sample was sampled. As compared with the pre-CPAP and the post-CPAP periods, during the CPAP period, the PaCO2 , alveolar-arterial oxygen gradient (P[A-a]O2 ), and respiratory rate significantly decreased. The PaO2 was higher at CPAP (105.6 ± 4.0 mm Hg) compared with pre-CPAP (80.6 ± 6.9 mm Hg) and post-CPAP (86.7 ± 5.8 mm Hg). Tolerance and sedation scores during the CPAP period were not different from those in the pre-CPAP and post-CPAP periods.ConclusionsNoninvasive CPAP applied through a helmet is a feasible and effective supportive technique in dogs recovering from general anesthesia.© Veterinary Emergency and Critical Care Society 2014.
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