Peer-reviewed veterinary case report
How common is low oxygen in dogs after anesthesia recovery
By Piemontese, C et al.Ā·Published in Veterinary journal (London, England : 1997)Ā·2024Ā·University of Bari, ItalyĀ·View original on PubMed ā
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Original publication title: The incidence of hypoxemia in dogs recovering from general anesthesia detected with pulse-oximetry and related risk factors.
- Species:
- dog
Plain-English summary
A group of dogs recovering from general anesthesia were monitored for low oxygen levels (hypoxemia) using a simple device called a pulse oximeter. The study found that if a dog's oxygen level dropped below 95%, it likely indicated a serious drop in blood oxygen levels. Out of 654 dogs, about 28% experienced low oxygen levels after surgery, particularly those with certain risk factors like being overweight or lying on their backs. This information can help veterinarians better monitor and treat dogs after anesthesia to prevent complications.
People also search for: dog low oxygen after surgery Ā· pulse oximeter for dogs Ā· dog anesthesia recovery risks
Abstract
The postoperative period is critical for the development of complications, including hypoxemia. To detect hypoxemia early and provide appropriate care, continuous monitoring of saturation is necessary: pulse oximetry is an easily accessible and simple method for this purpose. However, a SpOcut-off value to detect hypoxemia in dogs recovering from general anesthesia is lacking in the veterinary literature. The objectives of this clinical study are to validate the room air SpOtest (SpAT), to identify a cut-off value to discriminate hypoxemia (Phase 1), and to apply the SpAT to study the incidence of transient postoperative hypoxemia (TPH) (Phase 2) in dogs with healthy lungs recovering from general anesthesia. Phase 1: 87 dogs recovering from general anesthesia with an arterial line were included. After extubation, SpAT was performed simultaneously with arterial blood sampling. A PaO< 80 mmHg was considered hypoxemia. Phase 2: 654 dogs were enrolled. They underwent general anesthesia with different ventilation settings for different procedures. After extubation, dogs were classified as hypoxemic if the SpOwas lower than the cut-off obtained in phase 1. Phase 1 showed that the SpOcut-off is < 95% (sensitivity 100%, specificity 97.4%; area under the curve, AUC = 0.996; 95% Confidence Interval = 0.944-1; P<0.0001). In Phase 2, 169 dogs were hypoxemic. Body Condition Score (BCS) > 3/5, dorsal recumbency, FiO1, absence of Positive End-Expiratory Pressure (PEEP) had a significant odds ratio to induce TPH (5.8, 1.9, 3.7, 1.7, respectively). These results showed that SpO< 95% indicates PaO< 80 mmHg in dogs and TPH occurs in up to 28% of cases. Identification of associated risks could be useful to prevent and to increase awareness for monitoring and treatment.
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Search related cases āOriginal publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/38750813/