Correct Answer: D

Rationale: The correct answer is D: Calcium. Calcium is necessary for the chemical clotting process because it plays a crucial role in the activation of various clotting factors, leading to the formation of a blood clot. Without sufficient calcium, the clotting cascade would not be able to proceed effectively. Iron (choice A) is essential for red blood cell production, not clotting. Potassium (choice B) and Sodium (choice C) are important for various physiological functions but are not directly involved in the clotting process.

Correct Answer: C

Rationale: The correct answer is C: Romberg’s test. Romberg’s test assesses a patient's ability to maintain balance with eyes closed, relying on proprioception from the lower limbs. A lumbar injury can affect proprioception, leading to impaired balance. Rhine’s test evaluates auditory function, not affected by a lumbar injury. Pupillary reaction assesses cranial nerve function, unrelated to a lumbar injury. The patellar reflex is a deep tendon reflex, primarily involving the spinal cord segments L2-L4, not directly affected by a lumbar injury.

Correct Answer: A

Rationale: The correct answer is A: Diagnosis. After reviewing the patient's database and identifying concerning signs such as not voiding for over 8 hours, abnormal kidney function, and decreased oral intake, the nurse must move to the diagnosis step. In this step, the nurse will analyze the data collected to identify the patient's actual and potential health problems. This will help the nurse formulate appropriate nursing diagnoses and develop a plan of care to address the identified issues. Choice B (Planning) comes after the diagnosis step, where specific goals and interventions are established; Choice C (Implementation) follows planning and involves executing the planned interventions; Choice D (Evaluation) is the final step where the nurse assesses the effectiveness of the interventions. In this scenario, the nurse must first determine the patient's health problems before proceeding to planning, implementing, and evaluating care.

Correct Answer: B

Rationale: The correct answer is B because a Snellen chart reading of 20/80 means the patient can see at 20 feet what a normal eye can see at 80 feet. This indicates that the patient's vision is below average. Choice A is incorrect because it reverses the numerator and denominator. Choice C is incorrect because it does not accurately represent the Snellen chart findings. Choice D is incorrect because 20/80 is not considered normal vision.

Correct Answer: A

Rationale: The correct answer is A: Consider cultural differences during this assessment. In many Asian cultures, avoiding direct eye contact is a sign of respect and humility, especially when speaking to authority figures. By being aware of this cultural norm, the nurse can avoid misinterpreting the patient's behavior as a sign of depression or dishonesty. Asking the patient to make eye contact (choice B) may make the patient uncomfortable and disrupt the therapeutic relationship. Continuing with the interview and documenting depression (choice C) without considering cultural differences can lead to inaccurate assessment and inappropriate interventions. Notifying the health care provider for a psychological evaluation (choice D) is premature and unnecessary without first understanding the cultural context of the patient's behavior.