The CRNI (Certified Registered Nurse Infusion) credential is awarded by INS (Infusion Nurses Society) and validates expertise in vascular access, infusion therapy, and patient safety across all care settings. The certification exam is comprehensive — covering everything from peripheral IV insertion to tunneled port management and parenteral nutrition. This free CRNI practice test PDF gives you printable exam-style questions you can study anywhere, review on paper, and use to identify the content areas that need the most attention before test day.
A large portion of the exam focuses on VAD selection based on therapy duration, osmolarity, and patient condition. Know the criteria for peripheral IV (PIV) vs. midline vs. PICC vs. tunneled CVC vs. implanted port vs. non-tunneled CVC. Tip placement verification via chest X-ray (cavoatrial junction) is required for central lines before any infusion. Understand optimal site selection, vein assessment, and the relationship between catheter gauge and infusion rate.
Differentiate infiltration (non-vesicant fluid in surrounding tissue) from extravasation (vesicant or irritant drug leakage requiring immediate intervention). Know the INS phlebitis grading scale (0–4) and interventions at each grade. CLABSI prevention is high-yield: maximal sterile barrier precautions, chlorhexidine gluconate skin antisepsis, proper needleless connector scrub technique ("scrub the hub"), and evidence-based dressing change schedules.
Understand the osmolarity thresholds that dictate central vs. peripheral administration (solutions above 900 mOsm/L require central access). Review the pH ranges of common IV medications and their compatibility with standard diluents. High-alert medications tested include vesicant chemotherapy agents, concentrated potassium and sodium solutions, insulin drips (titration, hypoglycemia monitoring), and anticoagulants.
Know the macronutrient components of TPN (dextrose, amino acids, lipid emulsions), caloric calculations, and administration considerations. Central PN must be infused via a dedicated central line lumen. Monitor for metabolic complications: hyperglycemia, refeeding syndrome (hypophosphatemia), hypertriglyceridemia with lipid emulsions, and CLABSI risk with PN. Understand the role of the pharmacist and dietitian in the PN prescribing team.
Children require weight-based volume calculations, smaller catheter gauges, and age-appropriate developmental communication. Scalp veins may be used in neonates. Extravasation risk is higher due to fragile vessels and limited verbal reporting. Review special considerations for neonatal TPN and pediatric chemotherapy administration.
The INS Infusion Therapy Standards of Practice is the authoritative reference for the exam. Questions address scope of practice, informed consent for infusion procedures, documentation standards, patient rights, and the nurse's responsibility to report safety concerns and near-misses through appropriate channels.
Want immediate feedback on your answers? Take our interactive CRNI practice test online with instant scoring and detailed answer rationales. Use the online quizzes alongside the printable PDF to cover all the content domains tested on the CRNI certification exam.
Try these questions from our free CRNI Exam practice tests. The correct answer and an explanation follow each question.
A certified registered nurse infusion (CRNI) is preparing to insert a peripheral intravenous catheter for a scheduled antibiotic infusion. The patient, who is alert and oriented, states, "I've had bad experiences before, and I don't want the IV." Which of the following is the most appropriate initial action for the nurse to take?
Answer: B. Document the patient's refusal in the medical record and notify the prescribing provider.
The most appropriate action is to respect the patient's autonomy. An alert and oriented patient has the right to refuse treatment. The nurse's primary responsibility is to honor this refusal, document it accurately, and inform the prescribing provider so that alternative treatment plans can be considered.
A patient receiving an initial infusion of a new monoclonal antibody develops urticaria, dyspnea, and hypotension. After stopping the infusion, which pharmacologic agent should the certified registered nurse infusion (CRNI) anticipate administering as the first-line treatment for this reaction?
Answer: B. Subcutaneous or intramuscular epinephrine
The patient is exhibiting signs of anaphylaxis, a life-threatening systemic hypersensitivity reaction. Epinephrine is the primary, first-line medication used to treat anaphylaxis. Its alpha- and beta-adrenergic effects reverse bronchoconstriction, decrease vascular permeability, and support blood pressure. Antihistamines (diphenhydramine) and corticosteroids (methylprednisolone) are important secondary treatments but do not act as rapidly or effectively on the most life-threatening symptoms.
A patient receiving IV acyclovir complains of burning pain at the infusion site. The nurse observes swelling and pallor around the IV site. What is the priority action?
Answer: B. Stop the infusion and assess for extravasation
Acyclovir is highly alkaline and vesicant; signs of swelling and pallor indicate possible extravasation, requiring immediate cessation of the infusion and site assessment.
According to INS Standards of Practice, how should an infusion nurse respond when evidence-based research contradicts an existing institutional policy?
Answer: C. Advocate for policy review through appropriate channels while complying with current policy
INS Standards require nurses to practice evidence-based care and to advocate for policy changes through appropriate organizational channels (e.g., practice councils, clinical leadership) while continuing to comply with existing policy until it is formally revised.