Final Exam Study Guide Respiratory Normal values pH: 7.35-7.45 PCO2: 35-45 PO2: >80 mm Hg HCO3-: 22-26 mEq/L Assessing: 1. First note pH: 2. Determine primary cause of disturbance a. Alkalo sis b. Aci dosis 3. Determine if compensation has begun Chest Tubes- 1. Procedure: a. Fill water-seal chamber with sterile water to the 2-cm level b. If suction is to be used, fill the suction control chamber with sterile water to the 20-cm level, or as ordered by the health care provider c. Encourage the ...