Where should the nurse read the volume of liquid medication in a graduated cylinder?
At the measurement line
At the base of the meniscus
At the bevel
At the top of the cylinder
The Correct Answer is B
A. At the measurement line: While graduated cylinders have marked measurement lines, the correct technique requires reading the meniscus rather than aligning the eye with a line on the cylinder. Measurement lines alone do not ensure accuracy.
B. At the base of the meniscus: Liquid in a cylinder forms a concave curve, and the correct volume is read at the lowest point of this meniscus at eye level. This method ensures precise measurement and prevents dosing errors.
C. At the bevel: The bevel refers to the slanted edge of a syringe needle, not a graduated cylinder. Reading at the bevel is irrelevant and would produce inaccurate volume readings.
D. At the top of the cylinder: Reading the top of the liquid meniscus overestimates the volume and can result in administering an incorrect dose. Accuracy requires aligning the eye with the meniscus base.
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Related Questions
Correct Answer is D
Explanation
A. In the medication storage room while selecting the medication: Verifying the medication in the storage area is an important initial check, but it does not confirm the correct client or final safety considerations. Errors can still occur if the final check is not performed at the bedside.
B. At the time of documentation after administering the medication: Documentation after administration records the event but does not prevent errors during administration. Verification at this point is too late to ensure safety.
C. At the nurse's station while reviewing the provider's prescription: Reviewing orders at the nurse’s station helps with preparation, but it does not verify the correct medication, dose, or route for the specific client at the time of administration.
D. At the client's bedside immediately before giving the medication: The final verification at the bedside ensures the “five rights” of medication administration—right client, right drug, right dose, right route, and right time—are confirmed immediately prior to administration. This is the safest practice to prevent errors.
Correct Answer is A
Explanation
A. 15 drops: In standard IV administration using a macrodrip set, 1 mL of fluid is generally considered equivalent to 15 drops (gtts). This conversion is commonly used in clinical practice for calculating flow rates.
B. 10 drops: Ten drops per milliliter may apply to some microdrip sets, but it is not the standard macrodrip measurement. Using this value without verifying the tubing type could result in inaccurate dosing.
C. 5 drops: Five drops per milliliter is not a standard measurement in either macrodrip or microdrip IV sets and would underestimate the correct volume delivered.
D. 30 drops: Thirty drops per milliliter exceeds standard macrodrip calibration and is not used. Using this figure could lead to fluid overload if applied incorrectly.
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