Physiological Adaptation NCLEX-PN practice questions

Rationale

In heat stroke, rapid external cooling is the priority intervention. Applying ice packs to the neck, axillae, and groin targets areas where large superficial blood vessels (carotid, axillary, and femoral) lie close to the skin surface, maximizing heat transfer away from the core and accelerating reduction of the life-threatening temperature elevation. Option A: Antipyretics such as acetaminophen work by blocking pyrogen-mediated prostaglandin synthesis in the hypothalamus. Heat stroke results from failure of the body's thermoregulatory mechanism, not from a pyrogen response, so antipyretics are ineffective and are not indicated as the initial intervention. Option B: Covering the client with blankets traps metabolic and environmental heat, preventing dissipation and further elevating an already dangerous core temperature; this action is contraindicated in heat stroke. Option D: A warm shower adds external heat load and is contraindicated. Cool or cold water immersion or misting combined with fanning is the appropriate external cooling technique when ice packs are supplemented.

Answer: C

Rationale

Clients with temporary transvenous pacemakers are at risk for microshock because the pacemaker lead provides a direct pathway to the myocardium. Ensuring all electrical equipment is properly grounded is a standard safety measure that prevents stray electrical current from triggering lethal dysrhythmias. Option A: Fluid restriction is not an intervention for preventing lead displacement; pacemaker lead stability is maintained through position restrictions and securing connections, not by limiting fluids. Option B: The pacemaker generator must remain connected and at the bedside at all times; removing it would disconnect the pacing system and could cause life-threatening asystole or bradycardia. Option D: Reprogramming a pacemaker is not within LPN/LVN scope of practice; rate changes require a provider or qualified cardiac technician order and must be performed by an authorized clinician.

Answer: C

Rationale

Purulent yellow drainage is a sign of wound infection. Removing staples from an infected incision could disrupt the wound bed and worsen tissue integrity; the PN must stop and report this finding to the RN or provider before proceeding. Option A: Mild tenderness during staple removal is an expected finding and does not contraindicate the procedure. Option B: Small scabs at staple insertion sites are a normal part of wound healing at 10 days and do not require stopping the procedure. Option C: Faint pinkness along the incision at 10 days represents normal healing inflammatory response and is not a reason to delay staple removal.

Answer: D

Rationale

Placing cool, damp cloths over the forehead, axillae, and groin targets areas where large blood vessels are close to the skin surface, facilitating conductive and evaporative heat loss and safely lowering core temperature. Option A: Alcohol sponge baths are contraindicated in children because isopropyl alcohol is absorbed through the skin and can cause hypoglycemia, CNS depression, and toxicity. Option B: Wrapping the child in a warm blanket traps body heat and will worsen hyperthermia rather than reduce it. Option C: Ice-water immersion causes rapid peripheral vasoconstriction and shivering, which can paradoxically raise core temperature and cause cardiovascular stress; it is not used for routine fever management in children.

Answer: D

Rationale

Daily morning weights with a reporting threshold of more than 2 lb gained in 24 hours (or 5 lb in a week) is the standard self-monitoring strategy for detecting early fluid retention in heart failure before symptoms worsen (A). Increased dependent edema signals progressive fluid overload requiring prompt provider notification (C). Adhering to the prescribed daily fluid restriction is essential to prevent volume overload and acute decompensation (D). Option B: Diuretics prescribed for heart failure must be taken on a regular, scheduled basis. Taking them only when symptomatic results in inadequate and erratic fluid management, increasing the risk of acute decompensation. Option E: A sodium-restricted diet is a cornerstone of heart failure management. Excess dietary sodium drives fluid retention that diuretic therapy alone cannot reliably correct; unrestricted sodium intake will worsen the condition regardless of medication compliance. Option F: Worsening orthopnea (requiring additional pillows to breathe when lying flat) is a cardinal sign of decompensating heart failure indicating increasing pulmonary congestion. It requires prompt provider notification, not a wait-and-see approach, because delay can lead to a dangerous acute exacerbation.

Answer: A, C, D