(A) The teenager is already coping ineffectively and requires early detection and treatment, which is secondary prevention. (B) The client must be sent to a rehabilitation unit, which requires tertiary prevention. (C) Reducing the incidence of disease through education supports primary prevention. (D) A client with identified symptoms of post-traumatic stress disorder requires intervention by treatment.

Explanation/Reference:
Explanation:
(A) Riding a stationary bicycle or walking on a treadmill is done during a stress test. (B) During an echocardiogram, the client must lie supine while a technician performs the test. To perform the test, the technician uses a conductive gel and a transducer to obtain ultrasound tracings of the heart. (C) A physician need not be present during an echocardiogram, and it is neither invasive nor painful. (D) There is no premedication required for an echocardiogram.

Explanation
(A) Hypokalemia can cause digoxin toxicity. Administration of KCl would prevent this. (B) Thyroid agents decrease digoxin levels. (C) Quinidine increases digoxin levels dramatically. (D) Theophylline is not noted to have an effect on digoxin levels.

Section: Questions Set D
Explanation:
The length of labor has little bearing on the fourth stage of labor. The type of labor and delivery is significant.
(B) The type of episiotomy will affect the client's comfort level. However, the nurse's assessment and implementations center on prevention of hemorrhage during the fourthstage of labor. The amount of bleeding from the episiotomy or hematoma formation is of higher priority than the type of episiotomy. (C) The amount of IV fluid to be infused is a nursing function to be attended to; however, it is lower in priority than determining if hemorrhaging is occurring. (D) Character of the fundus would be the priority nursing assessment because changes in uterine tone may identify possible postpartum hemorrhage.

(A)
The client may be anxious and hyperresponsive to stimuli but not necessarily restless.
(B)
This is not a physiological response to an elevated blood pressure in PIH. (C) The nurse must know the nursing measures that decrease the potential for convulsions. A quiet, darkened room decreases stimuli and promotes rest. (D) External stimuli might induce a convulsion but are not annoying to the client with PIH.