Free CRNI Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation: The chain of infection contains six links; interrupting any one link can prevent transmission. Meticulous skin antisepsis and catheter-hub disinfection break the portal-of-entry link. Host susceptibility, reservoirs (including environmental surfaces), and hand hygiene remain important. Understanding epidemiology and the chain of infection is foundational to Infection Prevention and Control within Principles of Practice.

Comprehensive and Detailed Explanation: A midline catheter is inserted into a peripheral vein of the upper arm and advanced so that the tip lies in a peripheral vessel, typically at or distal to the axillary vein. It is not a central catheter; therefore tip confirmation by chest radiograph is unnecessary. Power-injectability depends on specific device design and labeling. Accurate differentiation between midline and central devices is a core expectation of the Access Devices content area.

Comprehensive and Detailed Explanation: Hyperglycemia is a common metabolic complication of parenteral nutrition caused by the high dextrose content. Management involves interdisciplinary collaboration to modify the formula (reduce dextrose concentration or add insulin) while continuing essential nutrition. Abrupt discontinuation can precipitate rebound hypoglycemia. Increasing the rate worsens hyperglycemia. Peripheral dextrose solutions cannot meet the full nutritional needs of a patient requiring TPN. Fluid-and-electrolyte balance and parenteral-nutrition content are weighted heavily in the Infusion Therapies domain.

Comprehensive and Detailed Explanation: PICC dwell time is determined by ongoing clinical need and absence of complications rather than an arbitrary number of days. Routine replacement solely because of dwell time is not recommended. Conversion or removal decisions are based on therapy requirements and device performance. Appropriate device management is a core Access Devices competency.

Comprehensive and Detailed Explanation: Supine positioning with a Valsalva maneuver or breath-hold increases intrathoracic venous pressure and reduces the risk of air embolism during catheter removal. Upright or semi-upright positions decrease venous pressure and increase air-entry risk. Correct removal technique is part of both Access Devices and Principles of Practice knowledge.