Correct Answer: C

Rationale: The nurse interprets this as respiratory alkalosis because the patient is likely experiencing hyperventilation, leading to a decrease in CO2 levels and respiratory alkalosis. This is indicated by an increase in pH and a decrease in PaCO2 on arterial blood gas analysis. Metabolic acidosis (choice B) is characterized by low pH and low bicarbonate levels, not seen in this scenario. Respiratory acidosis (choice A) is characterized by high PaCO2 levels and low pH, which is not the case here. Metabolic alkalosis (choice D) is characterized by high pH and high bicarbonate levels, which is not consistent with the patient's presentation.

Correct Answer: C

Rationale: The correct answer is C because in myasthenia gravis, which is characterized by muscle weakness and fatigue, the administration of edrophonium will temporarily improve muscle strength due to increased availability of acetylcholine at the neuromuscular junction. This improvement should be noted within 30 to 60 seconds after the administration of the medication. Choice A is incorrect because joint pain is not a typical response to edrophonium in the context of myasthenia gravis. Choice B is incorrect because feelings of faintness, dizziness, hypotension, and flushing are more indicative of a cholinergic crisis, which occurs when too much edrophonium is administered. Choice D is incorrect because an increase in muscle strength post-edrophonium administration would not be expected in a client with myasthenia gravis.

Correct Answer: B

Rationale: The correct answer is B because right-sided weakness is typically associated with damage or impairment in the left lobe of the brain. The brain controls the opposite side of the body, so weakness on the right side indicates left brain involvement. This is known as contralateral control. The other choices are incorrect because expressive aphasia is associated with left brain damage, problems in judging distance and proprioception are related to parietal lobe damage, and orientation to time and space is more related to frontal lobe damage. Therefore, the most accurate analysis by the nurse would be to consider the affected lobe as the right lobe in this case.

Correct Answer: C

Rationale: Objective data are measurable and observable facts obtained through physical examination or diagnostic tests. In this case, "Respirations 16" is a quantifiable and observable measurement, making it objective data. It is not influenced by personal interpretation or feelings. The other choices, such as "States 'doesn't feel good'", "Reports a headache", and "Nauseated" are subjective data because they are based on the patient's feelings or experiences, which can vary depending on individual perception and interpretation, making them less reliable for making clinical decisions. By focusing on objective data like "Respirations 16", the nurse can provide a more accurate assessment of the patient's condition.

Correct Answer: D

Rationale: The correct answer is D: Sigmoidoscopy. Sigmoidoscopy is a direct visualization procedure that allows for examination of the lower part of the colon and rectum, where colorectal cancer commonly occurs. This procedure can help identify any abnormal growths or polyps that may indicate cancer. Stool hematest (A) detects blood in stool but does not confirm colorectal cancer. Abdominal CT (B) provides imaging of the abdomen but may not definitively diagnose colorectal cancer. CEA scan (C) measures a tumor marker associated with colorectal cancer but is not a definitive diagnostic test. Thus, sigmoidoscopy is the most appropriate diagnostic study for confirming colorectal cancer.