The nurse administers 10 units of NPH insulin at 7 a.m. At what time does the nurse expect the patient to experience the peak benefit of the NPH insulin?
8 a.m.
10 a.m.
5 p.m.
11:30 p.m.
The Correct Answer is B
Choice A rationale
The onset of action for NPH insulin is typically 1.5 to 4 hours after administration. A peak at 8 a.m. would be too early, as it is only one hour after the injection time of 7 a.m. This timing would be more characteristic of a rapid-acting insulin such as lispro (Humalog) or aspart (Novolog).
Choice B rationale
NPH insulin is an intermediate-acting insulin. Its pharmacokinetics are characterized by a typical onset of 1.5 to 4 hours, a peak effect of 4 to 12 hours, and a duration of 14 to 24 hours. Given a 7 a.m. administration, the peak benefit is expected within the 4-12 hour window, making 10 a.m. a plausible time for the peak.
Choice C rationale
A peak at 5 p.m. would represent 10 hours post-administration, which falls within the typical 4-12 hour peak range for NPH insulin. However, 10 a.m. (3 hours post-administration) is also within the peak window and a more common early peak time. Both B and C are scientifically plausible, but 10 a.m. is a more representative average early peak.
Choice D rationale
A peak at 11: p.m. would be 16.5 hours after the 7 a.m. administration. This time is well outside the typical 4 to 12-hour peak range for NPH insulin. By 11: p.m., the insulin's effect would likely be waning or nearing the end of its duration of action.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Assessing the patient's voice is important for detecting potential laryngeal nerve damage during the surgery, which is a risk of total thyroidectomy. However, this is a monitoring action. The most critical, immediate concern post-operatively is related to preventing injury and managing potential airway compromise, which is more directly addressed by other interventions.
Choice B rationale
Encouraging the patient to ambulate postoperatively is important for preventing complications such as deep vein thrombosis and pneumonia. However, it is not the highest priority intervention immediately following a thyroidectomy, which is focused on preserving the integrity of the surgical site and preventing neck strain.
Choice C rationale
After a total thyroidectomy, the most critical intervention is to avoid extending the patient's neck. This is to prevent tension and stress on the surgical incision and sutures, which could lead to wound dehiscence or bleeding. This also protects the airway and prevents pressure on the trachea or recurrent laryngeal nerves.
Choice D rationale
Administering oxygen as needed is a valid intervention, particularly if the patient has signs of respiratory distress, which is a potential complication of neck surgery. However, maintaining the neck in a neutral, non-extended position is a foundational and continuous priority to prevent direct trauma to the surgical site and the structures within.
Correct Answer is C
Explanation
Choice A rationale
While managing surgical pain is important for patient comfort and can prevent splinting, which may lead to atelectasis, it is not the immediate priority. The risk of respiratory complications, such as aspiration or pneumonia, is a more serious and life-threatening concern in the immediate postoperative period for this type of surgery.
Choice B rationale
Ambulating the patient early is important for preventing complications like deep vein thrombosis (DVT) and promoting recovery. However, it is not the most critical priority immediately after an open hiatal hernia repair. The immediate post-operative risk of respiratory compromise due to the location of the incision and potential for stomach compression is the nurse's primary concern.
Choice C rationale
Preventing respiratory complications is the nurse's priority. The surgical incision is high in the abdomen, near the diaphragm, which can cause pain with breathing and lead to shallow respirations and atelectasis. There is also a risk of aspiration from the surgical site or nasogastric tube. The nurse must promote deep breathing and coughing to prevent pneumonia and atelectasis.
Choice D rationale
The management of the nasogastric tube is an important aspect of care after a hiatal hernia repair, as it is used to decompress the stomach and prevent pressure on the surgical site. However, the most life-threatening complication is a respiratory compromise. While the NG tube helps prevent vomiting and aspiration, the overall priority is to ensure adequate ventilation and prevent respiratory distress.
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