Correct Answer: A

Rationale: A pH of 10 indicates improper placement of the NG tube, requiring notification of the provider and holding the feeding. Choice B is incorrect because administering the tube feeding could lead to complications due to the improper placement. Choice C is incorrect as irrigating the tube with diet cola soda is not a standard practice for addressing this issue. Choice D is incorrect as applying intermittent suction does not address the problem of improper placement indicated by the high pH level.

Correct Answer: C

Rationale: Performing frequent oral care with a tooth sponge is the most appropriate nursing measure in this situation. It helps maintain oral hygiene, prevent dryness, and provide comfort for a client with an NG tube. Allowing the client to melt ice chips may not be suitable immediately post-surgery due to potential risks. Providing mints or swabbing the mouth with glycerin swabs may not address the need for proper oral care and hygiene, which is essential for a client with an NG tube.

Correct Answer: C

Rationale: Checking the client's gag reflex before eating or drinking is the highest priority for a client at risk for aspiration pneumonia. Aspiration pneumonia can occur when food, liquids, or saliva are inhaled into the lungs, leading to inflammation or infection. Checking the gag reflex helps prevent the aspiration of substances into the lungs. Assessing the client's level of consciousness (Choice A) is important but not as immediately critical as checking the gag reflex. Monitoring oxygen saturation (Choice B) is essential for respiratory assessment but does not directly prevent aspiration. Monitoring intake and output (Choice D) is important for overall client management but does not specifically address the risk of aspiration pneumonia.

Correct Answer: D

Rationale: When introducing solid foods to infants, iron-fortified cereal is usually recommended as the first food due to its high nutritional value and the importance of iron for the baby's development. Strained fruits (choice A) are often introduced later due to their higher sugar content. Pureed meats (choice B) and cooked egg whites (choice C) are usually introduced after iron-fortified cereal to provide additional sources of protein and other nutrients.

Correct Answer: C

Rationale: Loss of pulse in the extremity can indicate an arterial blockage, requiring immediate medical evaluation. Increased blood pressure and heart rate are common physiological responses after cardiac catheterization and may not necessarily indicate a complication. Decreased urine output is more indicative of renal function and may not be directly related to complications from the procedure.