A patient is prescribed Haloperidol 5 mg IM stat. The medication is available as Haloperidol 10 mg/mL. How many milliliters should the nurse administer?

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.

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.