Free CRNI Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation: Older adults frequently have thin, fragile skin and loss of subcutaneous tissue, increasing the risk of skin tears, hematomas, and infiltration. Selecting the smallest gauge appropriate for the prescribed therapy, releasing the tourniquet as soon as blood flashback is observed, and securing the catheter with gentle tension reduce mechanical trauma. Prolonged tight tourniquet application causes venous engorgement and rupture of fragile vessels. A steep insertion angle raises the likelihood of posterior-wall puncture. The antecubital fossa is generally avoided for routine short peripheral catheters because of joint motion and higher complication rates. These anatomy-and-physiology and special-population considerations are core elements of the Principles of Practice domain.

Comprehensive and Detailed Explanation: Each entry into a multi-dose vial requires fresh disinfection of the septum. Vials must be dated and discarded according to manufacturer and institutional beyond-use times. Leaving needles in place or unrestricted sharing increases contamination risk. Aseptic medication preparation is a core infection-prevention practice within Principles of Practice.

Comprehensive and Detailed Explanation: Continuous insulin infusions require precise rate control via an electronic pump and frequent blood-glucose monitoring to avoid hypoglycemia or hyperglycemia. Gravity administration lacks accuracy. Mixing with concentrated electrolytes risks incompatibility and dosing errors. Insulin solutions typically have shorter beyond-use times. Safe administration of high-alert medications is a critical Infusion Therapies competency.

Comprehensive and Detailed Explanation: Engineered stabilization devices (ESDs) anchor the catheter securely, reduce micro-motion that can introduce bacteria, and are used in conjunction with a sterile transparent dressing that permits site visualization. Non-sterile tape provides inferior stabilization. Suturing increases infection and scarring risk and is generally avoided. Routine daily replacement is not indicated. Proper securement is listed under Equipment and Device-Related Complications within Access Devices.

Comprehensive and Detailed Explanation: Insertion over a joint increases the risk of mechanical phlebitis, infiltration, and catheter dislodgement because of constant movement. Alternative sites that allow free joint mobility are preferred. Immobilization boards are used only when no other site is available and are temporary. Flexing the joint further stresses the catheter. Site selection that respects anatomy and reduces complications is a fundamental Principles of Practice competency.