Association of Surgical Technologists (AST) Core Curriculum
for Surgical Technology, 7th Edition
ST 210: Surgical Technology Core Review Prep with Detailed
Rationales
Course Name: Surgical Technology Core Review
Topic: Perioperative Case Management, Aseptic Technique, Surgical Procedures
etc.
Academic Year: 2026/2027
1. Perioperative Case Management
,During the preoperative case management phase, the surgical technologist is
preparing the sterile field for a laparotomy. When opening instrument trays, the
technologist notices that the chemical indicator inside a major tray has not
changed to the appropriate color. Which action should the technologist take
immediately?
A. Consider the entire tray unsterile, remove it from the field, and obtain a
replacement tray
B. Use the instruments anyway if the external autoclave tape indicates sterilization
C. Flash sterilize the specific instruments that will be needed first for the incision
D. Ask the circulator to pour sterile water over the tray to rinse any chemical
residue
CORRECT ANSWER: A. Consider the entire tray unsterile, remove it from
the field, and obtain a replacement tray
RATIONALE: An unchanged chemical indicator demonstrates that the
parameters of sterilization (such as steam penetration, temperature, or time) were
not fully met inside the tray. According to the AST Standards of Practice, if a
chemical monitor fails or is suspect, the load must be considered unsterile. Using
the instruments poses a severe risk of surgical site infection (SSI). External
autoclave tape only proves the outside package was exposed to heat, not that
sterilization occurred inside. Flash sterilization (Immediate Use Steam
Sterilization) is reserved for urgent individual items, not a failed primary tray.
Rinsing with sterile water does not sterilize items.
2. Aseptic Technique & Microbiology
The surgical technologist has established the sterile field. During the procedure, the
surgeon asks for a specialized retractor that is stored in a sterile peel-pack. As the
circulating nurse opens the peel-pack, the technologist observes the edge of the
retractor touching the unsterile lip of the packaging. How should this item be
managed?
A. Reject the retractor as contaminated and request a new, sterile instrument
B. Accept the instrument onto the field since it only touched the inner 1-inch
border
C. Wipe the retractor down with a sterile lap sponge soaked in normal saline before
,use
D. Use the instrument only if the surgeon states that the location is non-critical
CORRECT ANSWER: A. Reject the retractor as contaminated and request
a new, sterile instrument
RATIONALE: In aseptic technique, any item that touches an unsterile surface
or boundary must be considered contaminated. The lip of a peel-pack is unsterile
because it is exposed to the environment when peeled open. Wiping an instrument
with saline does not resterilize it. Surgeon preference or the "critical nature" of the
surgical site does not override strict rules of sterility; maintaining asepsis is an
absolute requirement to prevent patient harm.
3. Surgical Anatomy & Pathophysiology
During a cholecystectomy, the surgeon must carefully identify and ligate the
structures within the Triangle of Calot before removing the gallbladder. Which
structural margins define this anatomical space?
A. The cystic duct, the common hepatic duct, and the inferior border of the
liver
B. The hepatic artery, the portal vein, and the common bile duct
C. The celiac trunk, the splenic vein, and the pancreatic duct
D. The gastroduodenal artery, the pylorus, and the lesser curvature of the stomach
CORRECT ANSWER: A. The cystic duct, the common hepatic duct, and the
inferior border of the liver
RATIONALE: The Triangle of Calot is a critical anatomical landmark during
a cholecystectomy. Its boundaries are formed by the cystic duct, the common
hepatic duct, and the inferior border of the liver (or cystic artery). Accurate
identification of this triangle allows the surgical team to isolate and ligate the
cystic duct and cystic artery safely, avoiding accidental injury to the common bile
duct or hepatic vessels. The other options describe structures in unrelated
abdominal regions.
4. Surgical Instrumentation
, The surgical technologist is setting up a case that requires the cutting and
remodeling of bone tissue, such as a total knee arthroplasty. Which type of
instrument is explicitly classified as a powered surgical instrument used for this
purpose?
A. Oscillating sagittal saw
B. Lebsche sternal knife
C. Liston bone cutting forceps
D. Gigli wire saw
CORRECT ANSWER: A. Oscillating sagittal saw
RATIONALE: An oscillating sagittal saw is a power tool driven by
compressed air (pneumatic) or electricity, designed to make precise cuts in bone
tissue during orthopedic surgeries. A Lebsche knife and Liston forceps are manual
instruments. A Gigli wire saw is a manual, flexible wire saw used for bone
transection, not a powered surgical tool.
5. Legal & Ethical Doctrines
While adjusting the surgical lights, the surgical technologist accidentally breaks a
component that falls into an open laparotomy wound, injuring the patient. The
legal concept that establishes accountability because the injury was completely
preventable and under the direct control of the surgical team is:
A. Res ipsa loquitur
B. Primum non nocere
C. Aegor primi
D. Respondeat superior
CORRECT ANSWER: A. Res ipsa loquitur
RATIONALE: Res ipsa loquitur is a legal doctrine meaning "the thing speaks
for itself." It applies to situations where an injury occurs that would not normally
happen unless someone was negligent, and the instrument causing injury was
under the exclusive control of the defendant. Primum non nocere is the ethical
maxim "first, do no harm." Aegor primi is the AST motto "the patient first."
Respondeat superior means "let the master answer," holding the employer liable
for an employee's actions.
for Surgical Technology, 7th Edition
ST 210: Surgical Technology Core Review Prep with Detailed
Rationales
Course Name: Surgical Technology Core Review
Topic: Perioperative Case Management, Aseptic Technique, Surgical Procedures
etc.
Academic Year: 2026/2027
1. Perioperative Case Management
,During the preoperative case management phase, the surgical technologist is
preparing the sterile field for a laparotomy. When opening instrument trays, the
technologist notices that the chemical indicator inside a major tray has not
changed to the appropriate color. Which action should the technologist take
immediately?
A. Consider the entire tray unsterile, remove it from the field, and obtain a
replacement tray
B. Use the instruments anyway if the external autoclave tape indicates sterilization
C. Flash sterilize the specific instruments that will be needed first for the incision
D. Ask the circulator to pour sterile water over the tray to rinse any chemical
residue
CORRECT ANSWER: A. Consider the entire tray unsterile, remove it from
the field, and obtain a replacement tray
RATIONALE: An unchanged chemical indicator demonstrates that the
parameters of sterilization (such as steam penetration, temperature, or time) were
not fully met inside the tray. According to the AST Standards of Practice, if a
chemical monitor fails or is suspect, the load must be considered unsterile. Using
the instruments poses a severe risk of surgical site infection (SSI). External
autoclave tape only proves the outside package was exposed to heat, not that
sterilization occurred inside. Flash sterilization (Immediate Use Steam
Sterilization) is reserved for urgent individual items, not a failed primary tray.
Rinsing with sterile water does not sterilize items.
2. Aseptic Technique & Microbiology
The surgical technologist has established the sterile field. During the procedure, the
surgeon asks for a specialized retractor that is stored in a sterile peel-pack. As the
circulating nurse opens the peel-pack, the technologist observes the edge of the
retractor touching the unsterile lip of the packaging. How should this item be
managed?
A. Reject the retractor as contaminated and request a new, sterile instrument
B. Accept the instrument onto the field since it only touched the inner 1-inch
border
C. Wipe the retractor down with a sterile lap sponge soaked in normal saline before
,use
D. Use the instrument only if the surgeon states that the location is non-critical
CORRECT ANSWER: A. Reject the retractor as contaminated and request
a new, sterile instrument
RATIONALE: In aseptic technique, any item that touches an unsterile surface
or boundary must be considered contaminated. The lip of a peel-pack is unsterile
because it is exposed to the environment when peeled open. Wiping an instrument
with saline does not resterilize it. Surgeon preference or the "critical nature" of the
surgical site does not override strict rules of sterility; maintaining asepsis is an
absolute requirement to prevent patient harm.
3. Surgical Anatomy & Pathophysiology
During a cholecystectomy, the surgeon must carefully identify and ligate the
structures within the Triangle of Calot before removing the gallbladder. Which
structural margins define this anatomical space?
A. The cystic duct, the common hepatic duct, and the inferior border of the
liver
B. The hepatic artery, the portal vein, and the common bile duct
C. The celiac trunk, the splenic vein, and the pancreatic duct
D. The gastroduodenal artery, the pylorus, and the lesser curvature of the stomach
CORRECT ANSWER: A. The cystic duct, the common hepatic duct, and the
inferior border of the liver
RATIONALE: The Triangle of Calot is a critical anatomical landmark during
a cholecystectomy. Its boundaries are formed by the cystic duct, the common
hepatic duct, and the inferior border of the liver (or cystic artery). Accurate
identification of this triangle allows the surgical team to isolate and ligate the
cystic duct and cystic artery safely, avoiding accidental injury to the common bile
duct or hepatic vessels. The other options describe structures in unrelated
abdominal regions.
4. Surgical Instrumentation
, The surgical technologist is setting up a case that requires the cutting and
remodeling of bone tissue, such as a total knee arthroplasty. Which type of
instrument is explicitly classified as a powered surgical instrument used for this
purpose?
A. Oscillating sagittal saw
B. Lebsche sternal knife
C. Liston bone cutting forceps
D. Gigli wire saw
CORRECT ANSWER: A. Oscillating sagittal saw
RATIONALE: An oscillating sagittal saw is a power tool driven by
compressed air (pneumatic) or electricity, designed to make precise cuts in bone
tissue during orthopedic surgeries. A Lebsche knife and Liston forceps are manual
instruments. A Gigli wire saw is a manual, flexible wire saw used for bone
transection, not a powered surgical tool.
5. Legal & Ethical Doctrines
While adjusting the surgical lights, the surgical technologist accidentally breaks a
component that falls into an open laparotomy wound, injuring the patient. The
legal concept that establishes accountability because the injury was completely
preventable and under the direct control of the surgical team is:
A. Res ipsa loquitur
B. Primum non nocere
C. Aegor primi
D. Respondeat superior
CORRECT ANSWER: A. Res ipsa loquitur
RATIONALE: Res ipsa loquitur is a legal doctrine meaning "the thing speaks
for itself." It applies to situations where an injury occurs that would not normally
happen unless someone was negligent, and the instrument causing injury was
under the exclusive control of the defendant. Primum non nocere is the ethical
maxim "first, do no harm." Aegor primi is the AST motto "the patient first."
Respondeat superior means "let the master answer," holding the employer liable
for an employee's actions.
