ICU Basics: CCRN, PCCN & CEN

ICU Basics has 3,800+ CCRN, PCCN, CEN, CMC, CSC, ACLS and NBRC respiratory therapy practice questions, each with a full rationale, plus full-length mock exams built to each test plan. Created by Alex G, BSN, RN, CEN, CCRN, CMC, NREMT-P, an ICU nurse educator, for critical care and emergency nurses, respiratory therapists and nursing students. Free to use, with no account and no ads.

SEVEN EXAMS IN ONE APP
• CCRN (Adult), 1,700+ questions: cardiovascular, pulmonary, endocrine, hematology, GI, renal, neuro, multisystem and professional caring
• PCCN, 900+ questions, following the AACN progressive care test plan
• CEN, 1,100+ questions across every domain of the BCEN outline, with 175-question mocks
• CMC, 900+ questions: heart failure, ACS, electrophysiology and patient management
• CSC, 650+ questions: post-op hemodynamics, bypass complications and recovery
• ACLS, 250+ questions: megacode scenarios, rhythm recognition and the 2025 AHA algorithms
• NBRC RT, 550+ questions built to the content outline effective January 2027, the single exam that replaces the TMC and CSE, with 160-question, 4-hour mocks
• ICU Basics: every question in the app, sorted into 58 ICU topics from ABGs and vasopressors to ventilators, ECMO and LVADs

FULL-LENGTH MOCK EXAMS
• The real number of questions and time limit: 150 questions in 3 hours for the CCRN and PCCN, 175 in 3 hours for the CEN, 90 in 2 hours for the CMC and CSC
• Topic mix matched to the published test plan, with new questions every time
• Skip, go back, flag questions and review before you submit; leave anytime and the timer pauses

RHYTHM STRIPS AND WAVEFORMS
Rhythm strips and hemodynamic waveforms drawn in the app: atrial fibrillation and flutter, SVT, VT, torsades, heart blocks and paced rhythms, plus arterial line, CVP, PA catheter, IABP timing, capnography and ventilator tracings. Timed drills sweep like a live monitor.

STUDY MODES THAT BRING YOUR MISSES BACK
• Daily Review: spaced repetition brings questions back right before you would forget them
• Second tries and follow-ups: a miss returns at the end of the quiz, after a different question on the same idea
• Trouble Questions: everything you have missed three or more times, in one drill
• Final-week review: past misses return over the 7 days before your exam
• Question of the Day, custom and timed quizzes, Missed Questions and Weakest Subject
• A daily goal tied to your exam date, or a set number a day

DETAILED RATIONALES
Every question explains why the right answer is right and why each wrong answer is wrong.

STUDY REFERENCE
One search across 100+ drug monographs, 46 drips with a dose to mL/h converter, step-by-step algorithms from ACLS to massive PE, 100+ calculators and scores with the formula shown, lab values in US or SI units, rhythm and waveform libraries, and 55+ one-page topic sheets with their sources. Works offline. For education only; always follow your institution's protocols.

TRACK YOUR PROGRESS
• Readiness estimate from your mock scores and topic accuracy, weighted to the test plan
• Daily streak, accuracy and coverage by topic, mock scores over time, and the reviews due each day this week
• Notes on any question, search across the whole bank, and a countdown to your exam date
• Back up to Google Drive or a file and restore on a new phone

Also on the web at icubasics.com, with sample questions and free study guides for the CCRN, PCCN, CEN and respiratory therapy exams.

ICU Basics is an independent study aid and is not affiliated with, endorsed by, or sponsored by AACN, the AACN Certification Corporation, the American Heart Association, the Board of Certification for Emergency Nursing (BCEN), or the National Board for Respiratory Care (NBRC). CCRN, PCCN, CMC and CSC are exams of the AACN Certification Corporation; CEN is a registered trademark of BCEN; CRT and RRT are credentials of the NBRC. Content is for education and exam preparation only and is not medical advice.

Recent changes:
Hundreds of new CCRN, RT and ACLS questions, a valproate drug card, three new respiratory therapy reference pages, and updated chest tube and anticoagulant reversal guidance.