Correct Answer: A

Rationale: The correct answer is A because validating the client's statement about not needing glasses is crucial for accurate data collection. This step ensures that the client's difficulty reading is not due to poor eyesight. - Choice B is about interpreting physical signs, not client data validation. - Choice C involves documenting objective findings, not validating client information. - Choice D pertains to a client's complaint, not necessarily requiring validation.

Correct Answer: A

Rationale: The correct answer is A: Inform the physician. This is essential because a sudden change in vital signs may indicate a critical condition that requires immediate medical attention. The physician needs to be informed promptly to assess the situation and provide appropriate interventions. Summary: - B: Changing environmental settings is not a priority when dealing with sudden changes in vital signs. - C: Altering diet intake is not an immediate response to sudden changes in vital signs. - D: Decreasing physical activity may not address the underlying cause of the sudden change in vital signs.

Correct Answer: C

Rationale: Correct Answer: C - Dryness of mouth Rationale: 1. Trihexyphenidyl is an anticholinergic medication commonly used to treat Parkinson's disease. 2. Anticholinergic drugs inhibit the parasympathetic nervous system, leading to decreased secretions. 3. Dryness of mouth (xerostomia) is a common side effect of anticholinergic medications. 4. Excessive salivation, bradycardia, and constipation are not typically associated with anticholinergic drugs, making them incorrect choices.

Correct Answer: A

Rationale: The correct answer is A. Blood type A is considered the rarest because it is less common in the general population compared to other blood types. The rarity of blood type A is due to the combination of genetic factors that determine blood type. In contrast, blood types B and O are more common in the population, while blood type AB is considered the universal recipient type and is therefore not the rarest. Blood type A is less prevalent, making it the correct answer in this scenario.

Correct Answer: B

Rationale: The correct answer is B: Pericardial friction rub. This is a key diagnostic sign of pericarditis due to the inflammation of the pericardial layers causing a rough, grating sound heard upon auscultation. Precordial pain (A) is a common symptom but not a specific diagnostic sign. Hypotension (C) and rapid/labored respirations (D) are not typically associated with pericarditis. Therefore, the presence of a pericardial friction rub is crucial in confirming the diagnosis of pericarditis.