Arterial blood gas (abg) analysis-rationale: red blood cell count, sputum culture, total hemoglobin, and abg analysis all help evaluate a client with respiratory problems. however, abg analysis is the only test that evaluates gas exchange in the lungs, providing information about the clients oxygenation status.client needs category: physiological integrityclient needs subcategory: reduction of risk potentialcognitive level: comprehensionreference: smeltzer, s.c., and bare, b. brunner & suddarths textbook of medical surgical-nursing, 11th ed. philadelphia: lippincott williams & wilkins, 2008, p. 334.