A client has been admitted with chronic obstructive pulmonary disease. Diagnostic tests have been ordered. Which of the tests will provide the most accurate indicator of the client's acid-base balance?
A) Arterial blood gases (ABGs)
B) Pulse oximetry
C) Sputum studies
D) Bronchoscopy
Answer: A
ABGs are done to assess alterations in acid-base balance caused by respiratory disorders, metabolic disorders, or both. A bronchoscopy provides visualization of internal respiratory structures. Sputum studies can provide specific information about bacterial organisms. Pulse oximetry is a noninvasive test that evaluates the oxygen saturation level of blood.
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