Final answer:
Based on the differing pulse oximeter readings between the right arm and left leg, the RT should suspect a vascular issue or circulatory problem in the limb with the lower reading. Further tests are necessary for a definitive diagnosis.
Step-by-step explanation:
The student presented a scenario where a respiratory therapist (RT) observes different pulse oximeter readings on the right arm (89%) and the left leg (96%). The RT should suspect the presence of a condition affecting blood flow or oxygenation such as a peripheral arterial disease or a possible venous or arterial blockage in the limb with the lower reading.
Normal pulse oximeter readings usually range between 95-100%, and any significant difference between limbs may indicate a vascular anomaly or a circulatory issue. If blood flow is compromised in the right arm, it could lead to a decreased oxygen saturation reading, as observed. Considering that metabolism, athletic conditioning, and medical conditions can affect these readings, the RT should also evaluate symptoms and possibly conduct further tests to form a clear diagnosis.
Differences in readings from different body parts should prompt careful investigation, as conditions such as clots, plaques, or arteriosclerosis might be responsible for such disparities. This is a critical situation where meticulous diagnostics are necessary to avoid complications such as hypoxemia or ischemia.