A nurse is preparing to administer short-acting insulin to a patient with type 1 diabetes. Which of the following should the nurse keep in mind regarding this insulin type?
It has a peak effect of 4-6 hours.
It should be given once daily in the evening.
It starts to take effect within 30 minutes to 1 hour after administration.
It has a duration of action of 24 hours.
The Correct Answer is C
A. It has a peak effect of 4-6 hours is incorrect; short-acting insulin typically peaks between 2 to 3 hours after administration.
B. It should be given once daily in the evening is incorrect; short-acting insulin is usually administered before meals, not as a once-daily dose.
C. It starts to take effect within 30 minutes to 1 hour after administration is correct; this timing is critical for managing blood glucose levels during meals.
D. It has a duration of action of 24 hours is incorrect; short-acting insulin usually has a duration of about 3 to 6 hours.
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Correct Answer is A
Explanation
A. An INR of 5.0 indicates a significantly increased risk of bleeding, and administering vitamin K is the appropriate antidote for reversing the effects of warfarin. This is a critical intervention to restore coagulation.
B. Increasing the dose of warfarin is inappropriate in this scenario because the INR is already elevated; it would further increase bleeding risk.
C. While heparin can be used for anticoagulation, it is not appropriate to administer it while the INR is dangerously high without reversing the warfarin first.
D. Continuing warfarin is unsafe at this INR level due to the high risk of bleeding; monitoring for symptoms without intervention is not adequate care.
Correct Answer is B
Explanation
A. Prothrombin time (PT) is used to monitor warfarin therapy, not heparin therapy.
B. Activated partial thromboplastin time (aPTT) is the primary laboratory test used to assess the effectiveness of heparin therapy, measuring the time it takes for blood to clot and ensuring therapeutic levels.
C. The International normalized ratio (INR) is also related to warfarin therapy rather than heparin.
D. Serum potassium level is not relevant for assessing heparin therapy but may be monitored for other reasons.