5.2 Comprehensive Practice Questions

Study Where the Points Are

The CST blueprint is lopsided, and your review time should be too. Of 150 scored items:

Intraoperative Procedures is 41% of the whole exam by itself. If you master only one area, make it this one. Anatomy & Physiology (13%) and Sterilization & Equipment (11%) are the next tier. Microbiology and Pharmacology are small but high-density — a handful of well-studied facts can sweep those items.

Intraoperative (61 items): Sterile Technique, Counts, Instruments, Hemostasis

Sterile technique is the spine of the CST role. Know the bedrock rules cold:

• A sterile field includes only the front of the gown from chest to sterile-field level, gloved hands and arms, and the top of a draped table. Below the waist/table edge, the back, and under the arms are non-sterile.
• When in doubt, consider it contaminated. A sterile field is never left unattended; sterile persons face each other and pass back-to-back; moisture (strike-through) breaches a barrier.

Surgical counts prevent retained surgical items. Sponges, sharps, and instruments are counted before the procedure (baseline), before closure of a cavity, before wound/skin closure, and whenever staff relieve one another. Counts are done by the CST and circulator together, audibly and visually. An incorrect count is announced immediately; the surgeon is notified, the count is repeated, the wound and field are searched, and an X-ray is taken if it cannot be reconciled — all before the patient leaves the room.

Instrumentation items test recognition and use: clamps (hemostats like the Crile, Kelly, mosquito), graspers/forceps (tissue [toothed], Adson, DeBakey [atraumatic]), retractors (self-retaining vs. handheld), cutting (scalpel, Metzenbaum for tissue vs. Mayo for suture), and suction (Yankauer, Poole, Frazier). Know which Mayo stand setup matches a procedure and how to pass instruments ready-to-use, in a firm decisive snap into the surgeon's palm.

Hemostasis, Sterilization & Equipment (17 items), and A&P (20 items)

Hemostasis methods divide into mechanical (clamps, ligatures, pressure, bone wax, clips), thermal (electrosurgery/ESU, harmonic, laser, argon beam), chemical (Gelfoam, Surgicel, thrombin, Avitene, epinephrine), and pharmacologic. Electrosurgery safety is heavily tested: place the dispersive (grounding) pad over clean, dry, well-vascularized muscle; avoid pooling of prep solutions; the active electrode is holstered when not in use.

Sterilization & Equipment (17 items) rewards knowing parameters and definitions:

Know decontamination workflow (transport, sort, clean, inspect, package, sterilize) and biological indicators (spore tests, e.g., Geobacillus stearothermophilus for steam) versus chemical indicators. Sterilization kills all microbial life including spores; high-level disinfection does not reliably kill spores.

Anatomy & Physiology (20 items) is the largest science block. Prioritize the anatomy of commonly operated systems — abdominal layers and hernia sites, GI tract, biliary tree, female reproductive anatomy, the bony skeleton and joints, and major vessels and nerves you must protect intraoperatively.

Preop (18), Postop (12), Admin (9), Micro (6), Pharm (7)

Preoperative Preparation (18 items) covers patient identification and the surgical time-out (correct patient, procedure, site, and side), positioning (supine, Trendelenburg, lithotomy, prone, lateral) with pressure-point padding and nerve protection, skin prep (prep from incision site outward in concentric circles, allowing alcohol-based agents to dry to avoid fire), and draping to establish the sterile field.

Postoperative Procedures (12 items) address dressings (one-layer, three-layer, pressure), specimen care (label correctly; never let a specimen leave without proper handling), wound classification (Class I clean through Class IV dirty/infected), and room turnover/terminal cleaning plus instrument breakdown for decontamination.

Administrative & Personnel (9 items) include the CST scope of practice, documentation, chain of command, legal/ethical concepts (consent, Sterile Conscience — reporting your own break in technique), and roles of the surgical team.

Microbiology (6 items): know the chain of infection (agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), aerobic vs. anaerobic organisms, gram-positive vs. gram-negative staining, key pathogens (Staphylococcus aureus including MRSA, Pseudomonas, Clostridium, Escherichia coli, Mycobacterium tuberculosis, and prion/hepatitis/HIV bloodborne risks), and Standard Precautions treating all blood and body fluids as potentially infectious.

Surgical Pharmacology (7 items): local anesthetics (lidocaine; epinephrine added for vasoconstriction and longer duration, but never in fingers/toes/nose/penis), the six rights of medication, labeling all medications on the sterile field, and common agents (irrigation, hemostatics, contrast, dyes like methylene blue).