________ records provide a written description of the patient's illness and treatment.

Before a ventilator is used, an operational verification check is performed. A simple variation of this procedure is also performed under which of the following circumstances?

a. Before a blood gas sample is obtained. b. When the physician's order specifies a change in ventilator settings. c. Before a patient is reconnected to a venti-lator after the ventilator circuit has been changed or disassembled for any reason. d. Before the patient's hemodynamic status is monitored.

The following questions will require the use of an ICD-9-CM code book to complete the sentence. Aspiration of skin and subcutaneous tissue would be coded to __________

Fill in the blank(s) with correct word