The client asks the nurse about storing insulin. Which response by the nurse is correct?
Vials of insulin should be refrigerated.
Insulin will last longer if kept in the freezer.
Opened vials of insulin must be discarded.
Insulin pens never have to be refrigerated.
The Correct Answer is A
Choice A rationale:
Insulin is a protein-based hormone that is sensitive to heat and light. Exposure to high temperatures or direct sunlight can cause insulin to break down and become less effective.
Refrigeration helps to maintain the stability and potency of insulin. It is generally recommended to store unopened insulin vials in the refrigerator at a temperature between 36°F and 46°F (2°C and 8°C).
This temperature range helps to slow down the degradation process and ensure that the insulin remains effective until its expiration date.
Choice B rationale:
Insulin should never be frozen. Freezing can cause the insulin to crystallize and become unusable. Once insulin has been frozen, it cannot be thawed and used again.
Choice C rationale:
Opened vials of insulin do not need to be discarded immediately. They can be stored in the refrigerator for up to 28 days, depending on the type of insulin.
However, it is important to note the date that the vial was opened and to discard it after the recommended storage period.
Choice D rationale:
Insulin pens should be stored according to the manufacturer’s instructions. Some insulin pens can be stored at room temperature for a certain period of time, while others must be refrigerated.
It is important to read the instructions that come with the insulin pen to ensure that it is stored properly.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Requesting an order for morphine sulfate IV 2 mg over 1-5 minutes would not be appropriate at this time for several reasons: The patient has already received a dose of 4 mg 15 minutes ago, and it has not been effective in relieving the chest pain.
The patient is showing signs of increased respiratory effort, which could be a sign of respiratory depression. Administering an additional dose of morphine could worsen the respiratory depression.
The patient's heart rate is 82 beats per minute, which is within the normal range.
The patient's blood pressure is 135/88 mm Hg, which is also within the normal range.
Choice C rationale:
Administering naloxone (Narcan) to counteract respiratory depression would not be appropriate at this time because the patient is not showing signs of severe respiratory depression. Naloxone is a medication that is used to reverse the effects of opioid overdose. It is typically only used in situations where the patient is experiencing life-threatening respiratory depression.
Choice D rationale:
Administering morphine sulfate IV 4 mg over 1-5 minutes would not be appropriate for the reasons listed above. It could worsen the patient's respiratory depression and potentially lead to other complications.
Choice B is the best answer because it is the most conservative and safest option. By withholding the next dose of morphine and informing the provider about the patient's symptoms, the nurse can ensure that the patient receives the appropriate care and that any potential complications are avoided.
Correct Answer is A
Explanation
Choice A rationale:
Sildenafil (Viagra) is a phosphodiesterase-5 (PDE-5) inhibitor that is primarily used to treat erectile dysfunction. However, it also has vasodilatory effects, meaning it widens blood vessels. This can lead to a significant drop in blood pressure, especially when combined with nitroglycerin, another potent vasodilator.
Nitroglycerin is commonly used to treat chest pain (angina) and heart failure. It works by relaxing the smooth muscles in blood vessels, which allows them to widen and increase blood flow to the heart. This can help to relieve chest pain and improve heart function.
When sildenafil and nitroglycerin are taken together, their combined vasodilatory effects can cause a severe drop in blood pressure, known as hypotension. This can lead to a number of serious complications, including: dizziness, lightheadedness, fainting, heart attack, stroke.
The risk of hypotension is particularly high in patients who are already taking other medications that can lower blood pressure, such as alpha-blockers or nitrates. It is also important to note that the effects of sildenafil can last for up to 24-48 hours, so it is important to avoid taking nitroglycerin within this timeframe.
Due to the significant risk of hypotension, it is generally recommended that sildenafil be avoided within 24-48 hours of nitroglycerin administration.
Rationales for other choices:
Choice B: Aspirin
Aspirin is an antiplatelet medication that is often used to prevent blood clots. It does not have significant vasodilatory effects and does not interact with nitroglycerin in a way that would contraindicate its use.
Choice C: Adenosine
Adenosine is a medication that is used to treat certain types of arrhythmias (irregular heartbeats). It can cause a brief drop in blood pressure, but this effect is usually mild and transient. Adenosine does not interact with nitroglycerin in a way that would contraindicate its use.
Choice D: Oxygen
Oxygen is a gas that is often used to treat patients with respiratory problems. It does not have any direct vasodilatory effects and does not interact with nitroglycerin.
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