Which intervention should the nurse prioritize for a patient exhibiting a respiratory rate of 32 breaths per minute with shallow effort?

A. The client experiences drowsiness following mucolytic administration:Drowsiness is not a therapeutic goal of mucolytic therapy and may indicate a side effect or a different pharmacological interaction. Mucolytics like acetylcysteine are designed to alter the physical properties of mucus rather than induce sedation. This finding would be an adverse or unrelated outcome.

B. The client requires supplemental oxygen to maintain oxygen saturation:The need for supplemental oxygen suggests that gas exchange is severely compromised, possibly by worsening pulmonary congestion or inflammation. If a mucolytic were effective, airway patency should improve, potentially reducing the need for exogenous oxygen. This finding indicates clinical deterioration rather than success.

C. The client complains of persistent dry cough with scant mucus production:Mucolytics are intended to thin thick, tenacious secretions to make them easier to expectorate. A persistent dry cough suggests that secretions are either absent or remain too viscous to be moved. This outcome indicates the therapy has not achieved the desired liquefaction of mucus.

D. The client reports easier clearance of mucus and improved breathing:The primary mechanism of mucolytics is the cleavage of disulfide bonds in mucoproteins to reduce sputum viscosity. Successful treatment is evidenced by the patient's ability to mobilize and expel secretions with less effort. This directly leads to improved airway diameter and more efficient ventilation.

A. Antibiotics form the primary defense: Antibiotics are exogenous pharmacological agents used to treat an established infection by targeting bacterial structures. They are not a part of the body's natural, endogenous defense mechanisms. The body relies on physical barriers and innate immunity as its first line of protection.

B. Skin and mucous membranes function as chemical barriers: While these structures do secrete antimicrobial substances like sebum and lysozyme, their primary classification is as physical or mechanical barriers. They provide a structural wall that prevents pathogens from entering the internal environment. They are the body's initial line of defense.

C. Vaccination boosts chemical barriers: Vaccines work by stimulating the adaptive immune system to produce specific antibodies and memory cells against a particular pathogen. This is a form of acquired, specific immunity rather than a boost to the non-specific chemical barriers. They prepare the body for a secondary immune response.

D. Inflammation is a key component of nonspecific defense: Inflammation is a localized, immediate response to tissue injury or infection designed to contain the pathogen and initiate repair. It involves vasodilation, increased capillary permeability, and the recruitment of leukocytes. It is considered a non-specific defense because it responds similarly to any insult.