CRNI Infusion Pump Technology and Safety Practice Test

Question 1

What is the primary purpose of dose error reduction software (DERS) in smart infusion pumps?

Accepted Answer

To alert clinicians when programmed doses fall outside pre-established safe limits

Answer

Dose error reduction software compares the clinician-programmed infusion parameters (dose, rate, concentration) against a pre-established drug library with minimum and maximum limits. When a programmed value falls outside these limits, the pump generates a soft or hard alert, providing a critical safety net that intercepts potential medication errors before delivery begins.

Question 2

What is the difference between a soft limit and a hard limit in a smart pump drug library?

Accepted Answer

Soft limits can be overridden by the clinician; hard limits cannot be overridden and prevent the infusion from starting

Answer

Soft limits generate an alert that the clinician can override with clinical justification, while hard limits represent absolute maximum or minimum values that cannot be overridden under any circumstances. Hard limits prevent the pump from delivering doses that could cause serious harm regardless of the clinical situation.

Question 3

Which type of infusion pump is most appropriate for delivering precise low-volume continuous infusions of high-alert medications?

Accepted Answer

Syringe pump

Answer

Syringe pumps deliver the highest accuracy at low flow rates, making them ideal for high-alert medications like vasopressors, insulin, and neonatal infusions where precision in tenths of a milliliter per hour is critical. They use a mechanical drive that advances the syringe plunger at a precisely controlled rate.

Question 4

What is free flow in relation to infusion pump safety, and how is it prevented?

Accepted Answer

Free flow is uncontrolled gravity infusion when the administration set is removed from the pump, prevented by anti-free-flow clamps or mechanisms

Answer

Free flow occurs when the IV administration set is inadvertently removed from the pump without clamping, allowing uncontrolled gravity flow directly into the patient. Anti-free-flow mechanisms built into modern pump tubing sets automatically clamp when the set is removed from the pump channel, preventing this potentially lethal complication.

Question 5

A nurse is setting up a multi-channel infusion pump for a patient requiring three simultaneous infusions. What is the most important safety consideration?

Accepted Answer

Verifying each channel is programmed independently with the correct medication, dose, and rate for each specific line

Answer

The most critical safety consideration with multi-channel pumps is ensuring each channel is independently and correctly programmed for its specific medication. Channel mix-ups — where medication A is programmed on channel B's line — can result in catastrophic dosing errors. Each channel must be traced from the medication bag through to the patient and independently verified.

CRNI Exam Practice Test

CRNI Exam Practice Test

CRNI Infusion Pump Technology and Safety Practice Test