Where is the primary site for pulse oximetry placement in canines?

The primary site for pulse oximetry placement in canines is on the tongue. This location is optimal due to the high vascularity and thin tissue of the tongue, which allows for a more accurate reading of oxygen saturation levels in the blood. The mucous membranes of the tongue have good perfusion and are less likely to obstruct the sensor's infrared light, making them ideal for non-invasive measurement.

While other sites, such as the paw pad or ear tip, can also provide readings, they may not be as reliable as the tongue. Paw pads can sometimes present issues such as pigmentation or thickness of the skin, which may affect the accuracy of the pulse oximeter. The ear tip can also be used, but it may not be as easily accessible or practical in all scenarios compared to the tongue. Therefore, the tongue is preferred for consistent and reliable pulse oximetry in canines.