An OTA Is Working with a Client in the Hospital

An OTA is working with a client in the hospital after an exacerbation of COPD. While working with the client, the OTA notes that his oxygen saturation drops below 90%. What should the OTA do first in response to this information?

A) Take the client back to bed and call the physician.
B) Request that the client receive oxygen.
C) Restrict the client from additional activity.
D) Return the client to a resting position.