Why Surgical Technologists Study Anesthesia
The surgical technologist does not administer anesthesia, but understanding the anesthesia plan, its phases, and its risks allows the surgical team to anticipate needs, respond to emergencies, and maintain patient safety collaboratively. CST exam questions on anesthesia typically test recognition of anesthesia types, phase-specific risks, and the surgical technologist's supporting role - not dosing calculations or pharmacologic depth reserved for anesthesia providers.
The Four Phases of General Anesthesia
- Preinduction - patient is monitored (ECG, pulse oximetry, blood pressure), IV access confirmed, and preoxygenation begins. The surgical team should be quiet and minimize unnecessary movement to reduce patient anxiety before induction, and the room should be prepared to respond immediately if an emergent surgical need arises.
- Induction - an IV agent (commonly propofol) rapidly induces unconsciousness; this is one of the highest-risk phases due to potential airway complications, hemodynamic instability, and aspiration risk. The surgical tech should have suction immediately available and the room ready to proceed emergently if needed.
- Maintenance - anesthesia is sustained through inhalation agents, continuous IV infusion (total intravenous anesthesia, TIVA), or a combination, alongside neuromuscular blockade as needed for surgical relaxation. This is typically the longest and most stable phase.
- Emergence - anesthetic agents are discontinued and/or reversed, and the patient regains consciousness and protective airway reflexes. Like induction, this phase carries elevated risk for airway compromise, coughing/bucking on the endotracheal tube, and hemodynamic swings.
Airway Management
| Device | Description |
|---|---|
| Endotracheal tube (ETT) | Placed through the vocal cords into the trachea; provides the most secure airway and allows positive pressure ventilation and airway protection from aspiration |
| Laryngeal mask airway (LMA) | Supraglottic device that sits above the vocal cords; less invasive than an ETT but provides less airway protection, generally reserved for shorter procedures in appropriately selected patients |
| Mask ventilation | Used briefly during induction or for very short procedures; does not protect the airway from aspiration |
Regional Anesthesia
Regional techniques block nerve conduction to a specific body region while the patient may remain awake, sedated, or occasionally under general anesthesia depending on the case. Spinal anesthesia delivers local anesthetic directly into the cerebrospinal fluid for a dense, rapid block typically used for lower-body procedures; epidural anesthesia delivers local anesthetic into the epidural space, often via a catheter for continuous or repeated dosing, with a slower onset than spinal blocks. Peripheral nerve blocks target specific nerves or plexuses (such as a brachial plexus block for upper extremity surgery) for regional anesthesia or extended postoperative pain control.
Monitored Anesthesia Care and Local Anesthesia
Monitored anesthesia care (MAC) combines sedative/analgesic medication with continuous monitoring by an anesthesia provider, while the patient typically retains the ability to respond and protect their airway; it is frequently combined with local anesthetic infiltration at the surgical site for procedures that do not require general anesthesia.
Malignant Hyperthermia
Malignant hyperthermia (MH) is a rare but life-threatening hypermetabolic reaction triggered by volatile inhalation anesthetics and succinylcholine in genetically susceptible individuals, presenting with rapidly rising temperature, muscle rigidity, tachycardia, and metabolic acidosis. Every operating room must have immediate access to an MH cart stocked with dantrolene (the specific reversal treatment) and cooling supplies, and every surgical team member - including the surgical technologist - should know the location of this cart and their role in an MH response, since rapid treatment is directly tied to patient survival.
The Surgical Technologist's Supporting Role
- Maintain a quiet, prepared environment during induction and emergence, the highest-risk phases.
- Have suction and airway/emergency supplies immediately accessible throughout the case.
- Communicate promptly with anesthesia regarding surgical field status when relevant to anesthetic decisions (e.g., bleeding, position changes).
- Understand which local anesthetic agents are on the sterile field and ensure proper labeling and safe handling.
- Recognize signs of an anesthesia-related emergency (unusual vital sign trends reported by anesthesia, MH signs) and respond according to team protocol.
Why This Matters for the Exam
Anesthesia questions on the CST exam test conceptual understanding and team-based patient safety awareness rather than clinical anesthesia management itself. Know the phases, the airway devices, the anesthesia categories, and the surgical technologist's specific supporting responsibilities during each, and you will be well prepared for this content area.