A patient has a morphine sulfate patient-controlled analgesia (PCA) to control postoperative pain. When the nurse enters the room, the patient complains of pain. The nurse's first response is which of the following?

Client A has normal vital signs except for a mild fever, no urgent intervention needed.

Client B shows mild tachycardia and increased respiratory rate, but oxygen saturation and blood pressure remain stable, requires monitoring but not immediate action.

Client C has fever, tachycardia, and tachypnea, suggesting infection or dehydration. While assessment is needed, the patient is not in immediate distress compared to Client D.

Client D requires immediate nursing intervention due to the following critical findings: Bradycardia which may indicate poor perfusion, conduction abnormalities, or medication side effects, bradypnea can signal respiratory depression or impending failure, hypotension suggests shock or decreased perfusion, which may lead to organ failure and hypoxia, oxygen saturation below 90% is a critical finding and requires immediate intervention.

A. Positional BP readings. While orthostatic blood pressure readings can assess for postural hypotension, there is no indication in the current vitals that the client is experiencing symptoms such as dizziness or syncope.
B. Carotid pulse and temperature. The client’s temperature is already documented as normal, and the carotid pulse is not needed when an irregular radial pulse has been noted. The apical pulse is the preferred method to assess for irregularities.
C. Full respiratory system assessment. The respiratory rate is within the normal range, with regular rhythm and normal depth, so a full respiratory assessment is not the immediate priority.
D. Apical pulse for one minute. An irregular radial pulse suggests the possibility of an arrhythmia. The apical pulse provides a more accurate assessment of heart rhythm and rate, ensuring a complete evaluation of the irregularity.