A nurse is caring for a client who states, "I smoke because I have a lot of anxiety." The nurse should recognize the client's statement as which of the following defense mechanisms?

A. Heart rate: The client's heart rate increased significantly from 66/min to 104/min within 30 minutes of antibiotic administration. This tachycardia, especially in the context of other alarming symptoms, can indicate a compensatory mechanism for hypoperfusion due to vasodilation, a common feature of anaphylaxis.

B. Blood pressure: The client’s blood pressure has dropped significantly from 108/56 mm Hg to 88/56 mm Hg. Hypotension could be a sign of anaphylactic shock, especially considering the allergic symptoms (urticaria, swelling of the tongue).

C. Breath sounds: The presence of wheezing along with a drop in oxygen saturation (pulse oximetry 93%) is concerning for bronchospasm, which is common in allergic reactions or anaphylaxis. The client may need immediate airway management, including bronchodilators.

D. Urticaria: While urticaria (hives) is a classic sign of an allergic reaction, it is a skin manifestation and not as immediately life-threatening as airway compromise, hypotension, or a compensatory tachycardia.

E. Temperature: The temperature remains within a mild range (37.5°C/99.5°F to 37.6°C/99.7°F). It is slightly elevated but not concerning in the context of an allergic reaction. The temperature should be monitored but does not require immediate follow-up compared to the more critical findings.

F. Swollen tongue: Swelling of the tongue is a serious symptom of an allergic reaction and can lead to airway obstruction. Immediate intervention is required to prevent further complications, such as anaphylaxis, which can be life-threatening.

A. Place the client in a supine position: The position should prioritize the client’s safety and comfort, considering their condition and the risk of aspiration or discomfort. A supine position may not be the most appropriate for this client’s agitation or confusion.

B. Attach the straps to the side rails of the bed frame: Attaching the restraints to the side rails could be dangerous, as it may cause injury or further agitation. Restraints should be attached to a non-movable part of the bed to ensure the client’s safety and prevent injury due to entrapment.

C. Secure the straps with a square knot: Restraints should not be secured with a square knot, as this could make them difficult to release quickly in an emergency. Instead, the restraint should be fastened in a way that allows for quick removal when needed to ensure the client's safety.

D. Remove the restraints every 2 hr: It is essential to remove restraints at least every 2 hours to check for any signs of injury, provide comfort, and ensure circulation. Removing restraints allows for proper skin care and reduces the risk of complications like pressure ulcers.