2.8 Intraoperative Safety & Emergencies

The Surgical Fire Triad and Electrosurgery Safety

A surgical fire needs three elements present together — the fire triad:

Prevention is a team task: allow alcohol-based prep to dry fully (and not pool under the patient) before draping or activating the ESU, minimize oxidizer buildup under drapes near the head/neck, keep the active electrode in a holster when not in use, and never activate the ESU near the open airway in high-oxygen settings. If a fire occurs on the patient/drapes, the team stops the flow of airway gases, removes burning material, and extinguishes (smother or saline). The CST keeps sterile saline/water on the field for this reason.

Electrosurgery safety also prevents patient burns: the dispersive (return) electrode must contact clean, dry, well-vascularized muscle, be sized to the patient, and avoid bony prominences, scar, and implants; the surgeon's voice command "buzz" should pair the active tip safely; and smoke evacuation is used to remove the surgical plume.

Malignant Hyperthermia and Other Emergencies

Malignant hyperthermia (MH) is a life-threatening, inherited hypermetabolic reaction of skeletal muscle triggered by volatile inhalation anesthetics (e.g., sevoflurane, isoflurane) and the depolarizing relaxant succinylcholine. Signs include an early rise in end-tidal CO2, tachycardia, muscle rigidity (masseter spasm), hyperthermia (a late sign), and dark cola-colored urine (myoglobinuria).

Treatment is an emergency the whole team rehearses:

1. Stop the triggering agents and call for help; the case is halted or finished with non-triggering anesthesia.
2. Administer IV dantrolene sodium (the antidote), reconstituted and given rapidly; the CST/team helps mix the many vials needed.
3. Actively cool the patient (cold IV fluids, cooling blanket, iced lavage) and treat hyperkalemia and acidosis.
4. Monitor and support until stable; an MH cart with dantrolene must be available wherever general anesthesia is given.

The earliest and most sensitive sign of MH is an unexplained rise in end-tidal CO2 that does not respond to increased ventilation; rigidity, tachycardia, and a soaring temperature follow. Speed matters because mortality climbs with delay, so dantrolene must be reconstituted and pushed fast — newer formulations dissolve more quickly than the older 20 mg vials that each required dilution in sterile water. The CST helps by opening sterile water, reconstituting vials, and keeping the field controlled while the rest of the team cools the patient.

Other emergencies the CST supports include hemorrhage (keep extra sponges, ties, and vascular instruments ready), cardiac arrest (clear the field for CPR/defibrillation while protecting sterility as feasible), air embolism (flooding the field and repositioning), and anaphylaxis (commonly from latex — keep a latex-free environment for sensitive patients, identified during the pre-op assessment).

Medication Safety and Specimen Integrity on the Field

Medications enter the sterile field constantly (local anesthetics, irrigation antibiotics, contrast, hemostatic agents), so strict labeling prevents fatal errors:

• Label every medication and solution the moment it is received onto the field — name, strength/concentration, amount, and expiration date — even if only one drug is present. No unlabeled containers, ever.
• The circulator and CST verify the drug aloud (read-back) when transferring it to the field.
• Use distinct labeled containers for different solutions; never assume which cup holds what.
• At the end of the case, discard remaining labeled medications rather than carrying them over.

For specimens, accuracy is part of patient safety: pass them off promptly, identify the source and orientation aloud, ensure the container (not the lid) is labeled, and match the preservative to the test (formalin for routine, fresh/no formalin for frozen section, proper media for cultures). Maintain chain of custody for forensic items.

The surgical technologist's overarching duty is surgical conscience — the internalized commitment to acknowledge and correct any break in technique or safety, observed or not, because the patient cannot protect themselves while anesthetized.

The Time-Out, Tourniquet Safety, and Sharps

Intraoperative safety begins with the Universal Protocol and the surgical time-out. Before incision, the entire team pauses to verbally confirm the correct patient, correct procedure, and correct site (including laterality and the marked site), along with implant availability, antibiotic timing, and special equipment. The time-out is a key defense against wrong-site, wrong-procedure, and wrong-patient surgery, all classified as never-events, and every team member — including the CST — participates and must speak up if anything is unclear.

Pneumatic tourniquet safety matters in extremity surgery: cuff pressure and inflation time are set and announced, the limb is exsanguinated with an Esmarch before inflation, and prolonged inflation (generally limited and reperfused per protocol) is tracked to prevent nerve and tissue injury. Prep solution must not pool under the cuff, where it can cause a chemical burn.

Sharps safety protects the team:

• Use a neutral (hands-free) zone — a basin or magnetic mat — to pass scalpels and needles instead of hand-to-hand.
• Announce sharps when passing them.
• Keep used needles on the needle book/counter, never loose on the field.
• Activate safety-engineered devices (retracting blades) and dispose of sharps in puncture-resistant containers.

These practices, layered on top of fire, electrosurgery, MH, medication, and specimen safety, make the CST an active partner in protecting an anesthetized patient who cannot protect themselves.