A dog in respiratory distress should not be placed in which position for radiographs?

In a case where a dog is experiencing respiratory distress, placing the dog in the dorsal position (lying on its back) for radiographs is not advisable. The reason for this is related to the physiology of respiration. When an animal is positioned on its back, the weight of the thoracic structures can compress the thoracic cavity, which can exacerbate breathing difficulties. This position can also hinder the ability of the diaphragm to move as effectively, further compromising respiratory function.

In contrast, other positions such as sternal or lateral (regardless of side) allow for better lung expansion and facilitate breathing, making these options more suitable for a dog in respiratory distress. The sternal position, in particular, can keep the airways more open and allows for optimal ventilation.

Overall, choosing to avoid the dorsal position helps to ensure that the dog can maintain adequate airflow while undergoing necessary imaging procedures.