Equipment & Supplies for Drug Administration

1. A U-100 insulin syringe barrel is calibrated in which unit of measurement?

Insulin syringes are calibrated in units to directly match U-100 insulin concentration (100 units per mL), allowing patients to draw up the prescribed unit dose without converting to mL. Milliliters, milligrams, and milliequivalents are not the calibration markings found on standard insulin syringes.

2. A patient's insulin dose is 45 units, but the only insulin syringe available in stock is a 0.3 mL (30-unit) low-dose syringe. What should the technician do?

A 30-unit syringe cannot accurately measure a 45-unit dose, so the correct solution is to dispense an insulin syringe with adequate capacity, such as a 0.5 mL (50-unit) or 1 mL (100-unit) syringe. Drawing up two partial doses or splitting syringe use risks inaccurate dosing and contamination, and a general-purpose 3 mL syringe lacks unit markings needed for accurate insulin measurement.

3. What is the typical maximum volume capacity of a tuberculin (TB) syringe?

Tuberculin syringes are typically 1 mL syringes with fine gradations, used for measuring very small, precise volumes such as pediatric doses or allergy testing. 3 mL, 5 mL, and 10 mL syringes are larger-capacity, general-purpose syringes with less precise gradations for small volumes.

4. Why are dedicated insulin syringes calibrated in units rather than milliliters?

Insulin syringes are marked in units, matching how insulin doses are prescribed and the U-100 concentration standard, so patients can measure the exact prescribed dose without doing a unit-to-volume conversion that could introduce error. Insulin is given subcutaneously, not IV; unit markings aren't a general syringe requirement, and the unit markings do not affect draw-up speed.

5. Standard oral (enteral) dosing syringes are manufactured with a tip that will not connect to IV administration equipment. What is the primary purpose of this design?

Oral syringes use a non-Luer, incompatible tip (such as an ENFit-style connector) specifically to prevent accidental connection to IV lines or injectable equipment, a serious wrong-route medication error. Cost, powder measurement, and billing are not the safety rationale behind this design.

6. A patient is using a household teaspoon to measure a liquid morphine solution dosed at 5 mL PO q4h PRN. What should the technician recommend?

Household spoons vary significantly in actual volume and are unreliable for precise doses, especially for a potent controlled substance; a calibrated oral syringe ensures the patient measures the exact prescribed 5 mL. Continuing with an inaccurate spoon risks under- or overdosing, switching formulations isn't within the technician's authority to decide, and a tablespoon (15 mL) is even less precise for a 5 mL dose.

7. When withdrawing medication from a glass ampule, what equipment should be used to prevent glass particles from entering the solution?

A filter needle contains a small filter within its hub that traps glass particles that may break off when an ampule is snapped open, preventing them from being drawn into the syringe. A standard hypodermic needle, an 18-gauge needle without a filter, and a butterfly needle (used mainly for IV access) do not have this filtering capability.

8. After withdrawing medication from an ampule using a filter needle, what should be done before administering the injection?

Filter needles are intended for withdrawal only; the needle should be changed to a standard (non-filter) needle of appropriate gauge before injecting. Injecting through the same filter needle is not standard practice, discarding an appropriately withdrawn dose is unnecessary and wasteful, and adding diluent through the filter needle isn't related to this safety step.

9. What type of tubing typically connects an air compressor to the medication cup in a standard jet nebulizer setup?

Corrugated aerosol tubing connects the compressor to the nebulizer cup, delivering pressurized air that aerosolizes the medication for inhalation. Luer-lock and IV extension tubing are used for injectable/IV equipment, and nasal cannula tubing delivers supplemental oxygen, not compressed air for nebulization.

10. How does medication delivery via a nebulizer differ from delivery via a metered-dose inhaler (MDI)?

Nebulizers aerosolize a liquid drug solution into a mist inhaled gradually over several minutes via mouthpiece or mask, while an MDI delivers a single, pre-measured aerosolized dose almost instantly from a pressurized canister. Both devices use a form of medication reservoir; neither delivers medication intravenously; and nebulizers are used with many drug classes, not just steroids.

1. What is the primary clinical benefit of using a spacer (holding chamber) with a metered-dose inhaler?

A spacer allows the aerosol plume to slow and particles to reduce in size before inhalation, decreasing deposition in the mouth/throat and improving lung delivery, while also making timing between actuation and inhalation less critical. It does not increase the total labeled dose in the canister, does not eliminate the need to shake the inhaler, and has no sterilizing function.

2. A prescriber orders albuterol MDI for a 3-year-old child who cannot coordinate inhaler actuation with inhalation. What accessory should typically be dispensed with the inhaler?

A spacer with a mask allows a young child to breathe normally through the mask while the medication is actuated into the spacer, without needing to coordinate a deep inhaled breath with actuation. Simply providing an extra canister doesn't solve the coordination problem, a peak flow meter measures lung function rather than aiding drug delivery, and switching to a nebulizer would be a prescriber decision, not a default technician substitution.

3. Lancets used for home fingerstick blood glucose testing are typically which gauge?

Lancets are very fine, typically 28-33 gauge, to minimize pain from the small fingertip puncture needed for a blood glucose sample. Gauges like 14-16 or 18-20 are large-bore needles used for things like blood draws or IV access, not fingerstick lancets.

4. What storage advice should a technician give a patient regarding glucometer test strips?

Test strips are sensitive to humidity and air exposure, which can degrade their accuracy, so the vial should be kept tightly capped and stored in a dry, room-temperature location. Refrigeration is not recommended and can introduce condensation, leaving the vial open exposes strips to moisture, and a bathroom cabinet is typically a high-humidity environment from showering.

5. Needles used for subcutaneous insulin injections are typically which length and gauge range?

Insulin needles are designed to be short (commonly 4-8 mm) and fine-gauge (29-31G) since they only need to reach subcutaneous tissue, and minimizing needle size reduces injection discomfort. The other options describe longer and/or larger-bore needles more typical of IM injections or blood draws, inappropriate for routine insulin dosing.

6. A patient picking up a liquid oxycodone prescription asks for extra oral dosing syringes to measure doses accurately at home. Should the technician provide them?

Oral dosing syringes are not controlled items and are routinely provided alongside liquid medications, including controlled substances, to help ensure accurate measurement; this is standard, permitted practice and doesn't require a separate prescription. The other answers incorrectly restrict access to a basic ancillary safety supply.

7. A vial is labeled 'Sterile Water for Injection, preservative-free, single use only.' Which diluent should be used to reconstitute a medication requiring this specific vial?

The correct diluent is the one specified by the product labeling; when a single-use, preservative-free product calls for Sterile Water for Injection, that exact diluent should be used, particularly important for patient populations sensitive to preservatives (e.g., neonates). Bacteriostatic water contains benzyl alcohol and is not appropriate here, using 'any available diluent' ignores manufacturer instructions, and saline is not automatically interchangeable with water for injection.

8. The pharmacy is out of 0.9% Sodium Chloride vials needed to reconstitute an antibiotic. What should the technician do?

Diluent selection affects a product's stability, osmolarity, and safety, so a technician should never substitute diluents without pharmacist verification or checking manufacturer reconstitution instructions. Using sterile water interchangeably, using tap water, or substituting another medication solution are all inappropriate and potentially unsafe shortcuts.

9. In pharmacy and IV fluid terminology, what does 'NS' commonly stand for?

NS is the standard abbreviation for normal saline, an isotonic 0.9% sodium chloride solution commonly used as an IV fluid or diluent. It does not refer to a non-sterile product, a nasal spray, or a generic 'neutral' solution.

10. What does the abbreviation 'D5W' refer to?

D5W stands for 5% Dextrose in Water, a common IV maintenance fluid and diluent. It is not a sodium chloride solution, does not refer to 'units' of dextrose, and is not the same as dextran, a different plasma volume expander.

1. A pediatric IM injection requires an accurate 0.2 mL dose. Which syringe size is generally most appropriate for measuring this small volume precisely?

Smaller syringes like the 1 mL tuberculin syringe have finer gradation markings, allowing more precise measurement of small volumes such as 0.2 mL. Larger syringes (3 mL, 5 mL, 10 mL) have wider spacing between gradation marks, making small-volume measurements less accurate.

2. Which type of nebulizer uses high-frequency vibration (rather than compressed air) to generate an aerosol mist?

An ultrasonic nebulizer uses a vibrating piezoelectric crystal to generate high-frequency vibrations that convert liquid medication into an aerosol mist, without relying on compressed air. A jet nebulizer instead uses compressed air from a compressor; 'small-volume nebulizer' just describes cup size, not the mechanism; and 'metered-dose nebulizer' is not a standard nebulizer category.

3. When assembling a standard home nebulizer treatment kit, which combination of components should typically be included?

A standard nebulizer kit includes corrugated compressor tubing, a medication cup, and a mouthpiece or mask through which the patient inhales the aerosolized mist. A spacer is used with MDIs, not nebulizers, and MDI canisters or insulin syringes are unrelated pieces of equipment that don't belong in a nebulizer kit.

4. In needle sizing, what does a higher gauge number indicate about the needle?

Needle gauge has an inverse relationship with diameter: the higher the gauge number, the thinner the needle (e.g., a 30G needle is much finer than an 18G needle). Gauge does reflect bore diameter (not length), and gauge size alone doesn't restrict a needle to IV use only.

5. Why might a pharmacy technician use a larger-gauge needle to withdraw medication from a vial, then switch to a smaller-gauge needle for the actual injection?

A larger-bore needle allows easier, faster withdrawal of solution (especially viscous medications) while reducing the risk of coring the rubber stopper, while switching to a finer needle for injection minimizes patient discomfort and tissue trauma. Cost and legal requirements are not the rationale, and smaller needles absolutely can puncture a stopper, just less easily for withdrawal of viscous fluids.

6. What is the primary function of a lancing device used for home blood glucose monitoring?

A lancing device houses a lancet and uses a spring mechanism to deliver a quick, consistent-depth skin puncture, typically on a fingertip, to obtain a blood sample for glucose testing. It does not store strips, does not measure glucose itself (that's the glucometer's function), and does not sterilize the skin.

7. A patient starting a new insulin pen device asks the technician about pen needles. What is the most important thing for the technician to confirm?

Technicians should confirm the pen needle is compatible with and appropriately sized for the patient's specific pen device, since needle length/gauge choices can affect injection technique and comfort. Packaging quantity and needle color are not clinically important considerations, and pen needles should be changed with every injection, not reused.

8. What is the primary purpose of a 0.2-micron filter used during preparation of a sterile IV admixture?

A 0.2-micron filter is fine enough to trap bacteria and particulate contaminants, helping ensure the sterility of an IV admixture during preparation. It does not change drug concentration, has no effect on pH, and does not add any preservative to the solution.