The practical nurse (PN) is preparing cefazolin 400 mg IM for a client with a gram-positive infection. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state, for IM use, add 2 mL sterile water for injection. Total volume after reconstitution is 2.5 mL. After reconstitution, how many mL should be administered to the client? (Enter numeric value only. If rounding is required, round to the whole number, nearest tenths/hundredth).
The Correct Answer is ["1"]
This is the correct answer because the concentration of cefazolin after reconstitution is 1 gram/2.5 mL, which is equivalent to 400 mg/1 mL. Therefore, to administer 400 mg of cefazolin, the PN should draw up 1 mL of the reconstituted solution. This can be calculated using the formula:
Desired dose / Available dose = Volume to administer
400 mg / 1000 mg = x mL / 2.5 mL
x = (400 x 2.5) / 1000
x = 1 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The correct answer is **a. Report the finding to the healthcare provider.**
Choice A rationale:
The nurse should report the finding of the client's response to a painful stimulus to the healthcare provider. This response, known as a decorticate posturing, is an abnormal motor response that indicates a severe brain injury or dysfunction. It is a sign of impaired consciousness and requires immediate medical attention and intervention.
Choice B rationale:
While documenting the client's response to pain is important, the primary action the nurse should take is to report the finding to the healthcare provider. Decorticate posturing is a neurological emergency that requires prompt medical evaluation and treatment.
Choice C rationale:
Initiating seizure precautions is not the appropriate action in this case. Decorticate posturing is not a seizure, but rather an abnormal motor response indicating a severe brain injury or dysfunction. Seizure precautions would not be the appropriate intervention.
Choice D rationale:
Administering a prescribed PRN analgesic is not the appropriate action in this case. Decorticate posturing is a neurological emergency that requires immediate medical attention, not just pain management. Administering an analgesic would not address the underlying neurological issue.
Correct Answer is ["A","C","D","E"]
Explanation
Choice A rationale:
Verapamil is a calcium channel blocker and is expected to decrease heart rate by inhibiting calcium influx into cardiac cells, particularly in the SA (sinoatrial) node, where it can slow down the heart's electrical impulses.
Choice B rationale:
Increased contractility is not an expected outcome of verapamil use. In fact, verapamil's main action is to decrease myocardial contractility, making it useful for treating conditions like angina and atrial fibrillation.
Choice C rationale:
Verapamil is known to dilate coronary arteries, which can improve blood flow to the heart muscle and relieve symptoms of angina.
Choice D rationale:
Reduced blood pressure is an expected outcome of verapamil use due to its vasodilatory effects on peripheral blood vessels. This can be beneficial in treating hypertension and angina.
Choice E rationale:
Relieved chest pain is an expected outcome of verapamil use, particularly in the case of variant angina (Prinzmetal's angina), as it helps to relax coronary arteries and reduce coronary artery spasm, which is a common cause of chest pain in this condition.
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