Nokea
Combined with clinical manifestations, what is the laboratory finding that is most commonly used to diagnose acute pancreatitis?
- A. Increased serum calcium
- B. Increased serum amylase
- C. Increased urinary amylase
- D. Decreased serum glucose
Correct Answer: B
Rationale: Increased serum amylase is a key laboratory finding used to diagnose acute pancreatitis.
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Priority Decision: Before administering a bolus of intermittent tube feeding to a patient with a percutaneous endoscopic gastrostomy (PEG), the nurse aspirates 220 mL of gastric contents. How should the nurse respond?
- A. Return the aspirate to the stomach and recheck the volume of aspirate in an hour.
- B. Return the aspirate to the stomach and continue with the tube feeding as planned.
- C. Discard the aspirate to prevent overdistending the stomach when the new feeding is given.
- D. Notify the health care provider that the feedings have been scheduled too frequently to allow for stomach emptying
Correct Answer: B
Rationale: Returning the aspirate to the stomach and continuing the feeding is standard practice as long as the volume is within safe limits.
Which of these is most associated with villi?
- A. haustra
- B. lacteals
- C. bacterial flora
- D. intestinal glands
Correct Answer: B
Rationale: The correct answer is B: lacteals. Villi are small finger-like projections in the small intestine that increase surface area for nutrient absorption. Lacteals are lymphatic vessels found in villi responsible for absorbing dietary fats. Haustra are pouches in the colon, not associated with villi. Bacterial flora is mainly found in the large intestine, not specifically associated with villi. Intestinal glands are responsible for producing digestive enzymes, but they are not directly associated with villi.
Where is the majority of absorption of nutrients in the digestive tract?
- A. stomach
- B. small intestine
- C. large intestine
- D. mouth
Correct Answer: B
Rationale: The majority of absorption of nutrients occurs in the small intestine. This is because the small intestine has a large surface area due to its villi and microvilli, which increase the absorption capacity. Additionally, the small intestine contains specialized cells that facilitate the absorption of nutrients into the bloodstream. In contrast, the stomach's main function is to break down food, the large intestine primarily absorbs water and electrolytes, and the mouth is responsible for initial digestion through chewing and saliva production. Therefore, choice B is correct as it aligns with the anatomical and physiological functions of the digestive system.
Ondansetron (Zofran) is prescribed for a patient with cancer chemotherapy'“induced vomiting. What should the nurse understand about this drug?
- A. It is a derivative of cannabis and has a potential for abuse.
- B. It has a strong antihistamine effect that provides sedation and induces sleep.
- C. It is used only when other therapies are ineffective because of side effects of anxiety and hallucinations.
- D. It relieves vomiting centrally by action in the vomiting center and peripherally by promoting gastric emptying.
Correct Answer: D
Rationale: Ondansetron works centrally to block serotonin receptors in the vomiting center and peripherally by improving gastric motility.
Which of the following nutrients is absorbed in the stomach?
- A. vitamins
- B. water
- C. proteins
- D. carbohydrates
Correct Answer: B
Rationale: The correct answer is B: water. Water is the only nutrient that is absorbed in the stomach. The stomach mainly digests food using stomach acid and enzymes, but absorption of nutrients primarily occurs in the small intestine. Vitamins are absorbed in the small intestine, proteins are broken down in the stomach and further digested in the small intestine, and carbohydrates are primarily broken down and absorbed in the small intestine. Water, on the other hand, can be absorbed in the stomach through osmosis due to its small molecular size and the presence of aquaporins in the stomach lining.