CST Cheat Sheet 2026

The 30 highest-yield CST facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which microorganism is MOST resistant to sterilization and requires the highest level of processing to eliminate? → Bacterial endospores such as Bacillus anthracis
2. The postoperative instrument count reveals one extra instrument compared to the opening count. The most appropriate action is to: → Search the field and drapes, then report the discrepancy immediately
3. Malignant hyperthermia is most commonly triggered by which combination of agents? → Succinylcholine and volatile halogenated agents
4. What does a chemical indicator show? → Conditions for sterilization were met
5. During an open-heart procedure requiring cardiopulmonary bypass, which cannula is inserted first by convention? → Arterial cannula
6. What is the role of the surgical technologist during the time-out? → To actively participate and confirm patient identity, site, and procedure
7. What is the purpose of intravascular heparin administration prior to clamping the aorta during an abdominal aortic aneurysm (AAA) repair? → To prevent clot formation distal to the clamp
8. In Surgical Pharmacology, what is the FIRST step a CST professional should take when encountering a new case or situation? → Conduct a comprehensive assessment and gather all relevant information
9. During a whipple procedure (pancreaticoduodenectomy), which four structures are typically resected? → Head of pancreas, duodenum, gallbladder, and distal stomach
10. What is the significance of peer review in evidence-based practice & research methods for CST professionals? → It promotes accountability, knowledge sharing, and quality improvement
11. Chemical class indicators (Class 2 indicators) such as the Bowie-Dick test are used to: → Verify steam penetration in dynamic-air-removal sterilizers
12. Which type of indicator confirms that sterilization conditions were met inside a sterilization load? → Biological indicator (BI)
13. Which technology trend is most likely to impact evidence-based practice & research methods in the CST field in coming years? → Digital tools for enhanced data collection, analysis, and reporting
14. The primary purpose of enzymatic detergents used during instrument decontamination is to: → Break down organic soil such as blood and protein
15. When sterilizing a container system (rigid sterilization container), the filter or valve must be: → Checked for integrity before use and replaced if damaged or wet
16. Which packaging material is NOT compatible with hydrogen peroxide gas plasma sterilization? → Paper/cellulose-based wraps
17. The circulator reports that the patient's temperature has dropped to 35°C during a long procedure. The ST's BEST response is to: → Prepare warm irrigation fluids and notify the surgeon
18. Which segment of the nephron is primarily responsible for concentrating urine by reabsorbing water without solutes? → Collecting duct
19. Why should you never recap used needles? → To avoid accidental needle sticks
20. What is the purpose of the 'sign in' phase of the WHO Surgical Safety Checklist? → Verify patient identity, site marking, consent, and anesthesia readiness before induction
21. Which standard of practice is MOST important for ensuring quality in Surgical Pharmacology? → Following evidence-based protocols while adapting to specific circumstances
22. Which instrument is used to approximate (hold together) tissue edges while sutures are placed? → Tissue forceps
23. Which of the following correctly describes the sterile zone on a draped OR table? → Only the area directly above the table surface within the drape edges
24. Residual ethylene oxide (EO) left in materials after sterilization is dangerous because it: → Is toxic and can cause tissue injury if items are not properly aerated
25. When the sterile field must be left unattended between cases, what is the appropriate action? → The sterile field cannot be left unattended and must be broken down
26. What action should be taken if an instrument count is incorrect at wound closure? → Perform an immediate search of the wound, drapes, and room before closing
27. Which of the following best describes a key competency required for quality assurance & performance improvement in CST certification? → Critical thinking and evidence-based decision making
28. Why is OR turnover important? → To reduce infection risk and prepare for the next case
29. A surgical team member who is unscrubbed (circulator) should maintain what minimum distance from the sterile field? → 12 inches
30. What is the significance of peer review in professional ethics & legal compliance for CST professionals? → It promotes accountability, knowledge sharing, and quality improvement