Intraoperative Procedures - Domain Overview
Intraoperative Procedures (INTRA) is the largest and most heavily weighted domain on the CST exam, accounting for approximately 45.3% of the total score (68 of 150 scored items). It covers everything that happens during the surgical procedure itself, from maintaining the sterile field through instrument passing, hemostasis, specimen handling, wound closure, and surgical counts.
What This Domain Covers
- Sterile technique principles and the surgical technologist's role in maintaining an uncontaminated field throughout the case.
- Instrument identification and passing technique across general, orthopedic, cardiothoracic, neurosurgical, and other specialty trays.
- Surgical counts - sponges, sharps, and instruments - including discrepancy resolution.
- Hemostasis methods: mechanical, thermal (electrosurgery), and chemical/topical agents.
- Specimen handling chain of custody, from removal through pathology transfer.
- Wound closure techniques, suture selection, and drain placement.
- Minimally invasive and robotic-assisted surgery fundamentals.
- Recognizing and responding to intraoperative emergencies.
Why INTRA Dominates Your Study Plan
Because nearly half the exam draws from this single domain, your INTRA preparation should receive proportionally more time than any other section. Strong performance here has the single largest impact on your overall score, and INTRA concepts (sterile technique, hemostasis, counts) connect directly to nearly every other domain on the exam.
Frequently Asked Questions
What percentage of the CST exam is INTRA?
Intraoperative Procedures makes up approximately 45.3% of the exam, or 68 of the 150 scored questions - by far the largest domain.
How should I allocate study time for INTRA?
Because INTRA carries nearly half the exam's weight, allocate roughly proportional study time - meaning INTRA should receive substantially more review than any single smaller domain.
What INTRA subtopics are tested most heavily?
Instrument identification, sterile technique application, and surgical counts are consistently high-yield within this domain.
Explore the full INTRA study suite: Glossary, Exam Tips, Exam Day Guide, and Common Mistakes.