Typical changes in total body water in older people include:

A. Obesity is a common symptom of Cushing syndrome but is not the primary diagnostic criterion. Other tests are needed to confirm the diagnosis.

B. A 24-hour urine collection for cortisol is one of the most common and reliable methods for diagnosing Cushing syndrome. Elevated cortisol levels in the urine are indicative of the syndrome.

C. Chronic renal failure is not related to the diagnosis of Cushing syndrome. While Cushing syndrome may affect renal function, it is not the primary diagnostic tool.

D. Alcoholism can cause symptoms similar to those of Cushing syndrome, but it is not used as a diagnostic criterion. The diagnosis of Cushing syndrome requires specific tests, such as urine cortisol measurement.

A. A room within view of the nurses' station does not provide the necessary isolation for a client with active tuberculosis. Tuberculosis is a contagious airborne disease, and isolation in a room with appropriate ventilation is essential.

B. A room with another nonsurgical client is not appropriate for a patient with active tuberculosis, as it could lead to the spread of the infection to another patient. Isolation in a room designed to prevent airborne transmission is necessary.

C. A room with air exhaust directly to the outdoor environment is the most appropriate choice. Tuberculosis is transmitted through airborne particles, so the client should be placed in a negative pressure room with exhaust ventilation that directs the air outside to prevent the spread of the infection.

D. A room in the ICU is not necessary unless the client requires intensive care. The primary concern is ensuring appropriate isolation, which can be achieved in a standard room with the proper ventilation, rather than an ICU setting.