A nurse is admitting a client who has pertussis. Which of the following types of transmission-based precautions should the nurse initiate?

A. Increased blood pressure:
In hypovolemia, the body experiences a significant loss of blood volume, which leads to a reduction in the amount of blood available to circulate through the vessels. This causes a drop in blood pressure, known as hypotension, rather than an increase. The body tries to compensate for the lower blood volume by constricting blood vessels and increasing heart rate, but this typically isn't sufficient to increase blood pressure to normal levels.

B. Decreased heart rate:
The body's natural response to hypovolemia includes an increase in heart rate, known as tachycardia, as the heart attempts to pump the remaining blood more efficiently to vital organs. This compensatory mechanism aims to maintain cardiac output despite the decreased blood volume.

C. Dyspnea:
Dyspnea, or difficulty breathing, can occur in many medical conditions, including heart failure and respiratory issues. While it can be seen in severe cases of hypovolemia, particularly if the condition leads to shock and subsequent multi-organ failure, it is not a primary or specific sign of hypovolemia.

D. Weak pulse:
A weak pulse is a primary and direct manifestation of hypovolemia. Due to the reduced volume of circulating blood, the heart has less blood to pump with each contraction, leading to a weaker pulse. This symptom indicates a decreased perfusion pressure, which is characteristic of hypovolemia. The body's compensatory mechanisms include vasoconstriction and an increased heart rate, but these measures often result in a pulse that is rapid but weak.

A) Asking the client to cough while inserting the NG tube:
This action is not necessary and may not be appropriate during the insertion of an NG tube. Coughing can increase the risk of gagging and aspiration during the procedure.

B) Wearing sterile gloves to insert the NG tube:
While the nurse should maintain appropriate hand hygiene, wearing sterile gloves is not typically necessary for the insertion of an NG tube. Clean gloves are sufficient for this procedure.

C) Placing the client into a left lateral position before inserting the NG tube:
Positioning the client in a high Fowler's position (sitting upright) or semi-Fowler's position is generally preferred for NG tube insertion to facilitate tube passage into the esophagus and reduce the risk of aspiration. Placing the client in a left lateral position is not typically done for NG tube insertion.

D) Determining the length of the NG tube to be inserted prior to the procedure:
This is the correct action. Before inserting the NG tube, the nurse should measure the distance from the tip of the client's nose to the earlobe and then from the earlobe to the xiphoid process or the mark on the NG tube corresponding to the desired insertion length. This helps ensure that the tube is inserted to the appropriate depth and reaches the desired location within the gastrointestinal tract.