Select the appropriate HCPCS code for the following item

Which of the following parameters should be used to guide the oxygenation and ventilation of the patient with a traumatic brain injury?

A) Maintain an oxygen saturation level of at least 96 percent and a capnography reading between 35 and 40 mmHg. B) Maintain an oxygen saturation level of at least 90 percent and a capnography level < 45 mmHg. C) Maintain an oxygen saturation level of at least 98 percent and a capnography reading > 45 mmHg. D) Maintain an oxygen saturation level of at least 90 percent and a capnography reading < 35 mmHg.

During which phase of general anesthesia would the risk of aspiration be the greatest?

a. induction b. maintenance c. emergence d. recovery