AST PRACTICE TEST EXAM #1 (FOR CERTIFICATION EXAM) QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM UPDATE 2026/2027.
Core Domains
1. Surgical Anatomy and Physiology
2. Aseptic Technique and Sterilization
3. Surgical Instrumentation and Equipment
4. Pharmacology and Anesthesia
5. Patient Care and Safety
6. Surgical Procedures and Techniques
7. Medical Terminology and Documentation
8. Regulatory Compliance and Ethical Standards
9. Emergency Situations and Critical Thinking
10. Professional Development and Communication
Introduction
This comprehensive examination is designed to assess the knowledge and skills essential for certification as a
surgical technologist. The test covers a wide range of topics, including surgical anatomy, aseptic techniques,
instrumentation, and patient care, with a strong emphasis on real-world application and decision-making. The
questions are presented in a multiple-choice format, featuring clinical scenarios that reflect the challenges and
responsibilities encountered in the operating room. This assessment aims to evaluate not only foundational
knowledge but also the critical thinking and ethical judgment required to ensure patient safety and successful
surgical outcomes. Successful completion of this practice exam will indicate readiness for the official certification
examination.
,SECTION ONE: QUESTIONS 1-100
Question 1
A surgical technologist is preparing the back table for a total knee arthroplasty. Which of the following is the
MOST critical action to prevent a retained foreign body?
A. Counting all sponges and sharps at the end of the procedure only.
B. Using radiopaque sponges exclusively for the procedure.
C. Performing a wound check and counting sponges before closure.
D. Verifying the count with the circulating nurse at the end of the procedure.
🟢C
🔴 RATIONALE: The most critical action to prevent a retained foreign body is performing a wound check and
counting sponges before closure. While final counts are essential, the wound check is the definitive step to
ensure no items are left in the patient. Counting only at the end could still result in a retained item if the count
is incorrect or if an item is missed.
Question 2
In the context of surgical asepsis, the sterile field is considered contaminated if:
A. The sterile drape is placed over a non-sterile table.
B. A sterile team member’s hands fall below the waist.
C. The circulating nurse touches the sterile field with a sterile gloved hand.
D. An unsterile item is introduced within six inches of the sterile field.
,🟢B
🔴 RATIONALE: A sterile team member's hands falling below the waist is a violation of sterile technique because
the area below the waist is considered unsterile. The sterile field is only as sterile as the personnel and items
within it. The other options are also breaches, but the question asks for when the field is considered
contaminated based on a specific action.
Question 3
A patient undergoing a laparoscopic cholecystectomy has a sudden drop in end-tidal CO2. What is the MOST
likely cause?
A. Hypothermia
B. Bronchospasm
C. Venous air embolism
D. Malignant hyperthermia
🟢C
🔴 RATIONALE: A sudden drop in end-tidal CO2 during laparoscopic surgery is highly suggestive of a venous
air embolism. Carbon dioxide insufflation can enter a blood vessel, traveling to the heart and lungs, causing a
rapid decrease in CO2 elimination. Hypothermia and bronchospasm typically cause other changes, and
malignant hyperthermia is associated with a rise in CO2.
, Question 4
Which of the following is the PRIMARY purpose of applying a pneumatic tourniquet?
A. To prevent venous stasis.
B. To provide a bloodless surgical field.
C. To reduce the risk of deep vein thrombosis.
D. To immobilize the surgical site.
🟢B
🔴 RATIONALE: The primary purpose of a pneumatic tourniquet is to provide a bloodless surgical field by
occluding arterial blood flow to the extremity. This improves visualization, facilitates dissection, and reduces
blood loss. While it may indirectly reduce the risk of other complications, the primary goal is hemostasis for
better surgical conditions.
Question 5
A surgical technologist is performing a count and finds a discrepancy in the sponge count. What is the FIRST
action to take?
A. Inform the surgeon immediately.
B. Notify the circulating nurse.
C. Begin a systematic search for the missing sponge.
D. Document the discrepancy in the patient's record.
🟢B
ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM UPDATE 2026/2027.
Core Domains
1. Surgical Anatomy and Physiology
2. Aseptic Technique and Sterilization
3. Surgical Instrumentation and Equipment
4. Pharmacology and Anesthesia
5. Patient Care and Safety
6. Surgical Procedures and Techniques
7. Medical Terminology and Documentation
8. Regulatory Compliance and Ethical Standards
9. Emergency Situations and Critical Thinking
10. Professional Development and Communication
Introduction
This comprehensive examination is designed to assess the knowledge and skills essential for certification as a
surgical technologist. The test covers a wide range of topics, including surgical anatomy, aseptic techniques,
instrumentation, and patient care, with a strong emphasis on real-world application and decision-making. The
questions are presented in a multiple-choice format, featuring clinical scenarios that reflect the challenges and
responsibilities encountered in the operating room. This assessment aims to evaluate not only foundational
knowledge but also the critical thinking and ethical judgment required to ensure patient safety and successful
surgical outcomes. Successful completion of this practice exam will indicate readiness for the official certification
examination.
,SECTION ONE: QUESTIONS 1-100
Question 1
A surgical technologist is preparing the back table for a total knee arthroplasty. Which of the following is the
MOST critical action to prevent a retained foreign body?
A. Counting all sponges and sharps at the end of the procedure only.
B. Using radiopaque sponges exclusively for the procedure.
C. Performing a wound check and counting sponges before closure.
D. Verifying the count with the circulating nurse at the end of the procedure.
🟢C
🔴 RATIONALE: The most critical action to prevent a retained foreign body is performing a wound check and
counting sponges before closure. While final counts are essential, the wound check is the definitive step to
ensure no items are left in the patient. Counting only at the end could still result in a retained item if the count
is incorrect or if an item is missed.
Question 2
In the context of surgical asepsis, the sterile field is considered contaminated if:
A. The sterile drape is placed over a non-sterile table.
B. A sterile team member’s hands fall below the waist.
C. The circulating nurse touches the sterile field with a sterile gloved hand.
D. An unsterile item is introduced within six inches of the sterile field.
,🟢B
🔴 RATIONALE: A sterile team member's hands falling below the waist is a violation of sterile technique because
the area below the waist is considered unsterile. The sterile field is only as sterile as the personnel and items
within it. The other options are also breaches, but the question asks for when the field is considered
contaminated based on a specific action.
Question 3
A patient undergoing a laparoscopic cholecystectomy has a sudden drop in end-tidal CO2. What is the MOST
likely cause?
A. Hypothermia
B. Bronchospasm
C. Venous air embolism
D. Malignant hyperthermia
🟢C
🔴 RATIONALE: A sudden drop in end-tidal CO2 during laparoscopic surgery is highly suggestive of a venous
air embolism. Carbon dioxide insufflation can enter a blood vessel, traveling to the heart and lungs, causing a
rapid decrease in CO2 elimination. Hypothermia and bronchospasm typically cause other changes, and
malignant hyperthermia is associated with a rise in CO2.
, Question 4
Which of the following is the PRIMARY purpose of applying a pneumatic tourniquet?
A. To prevent venous stasis.
B. To provide a bloodless surgical field.
C. To reduce the risk of deep vein thrombosis.
D. To immobilize the surgical site.
🟢B
🔴 RATIONALE: The primary purpose of a pneumatic tourniquet is to provide a bloodless surgical field by
occluding arterial blood flow to the extremity. This improves visualization, facilitates dissection, and reduces
blood loss. While it may indirectly reduce the risk of other complications, the primary goal is hemostasis for
better surgical conditions.
Question 5
A surgical technologist is performing a count and finds a discrepancy in the sponge count. What is the FIRST
action to take?
A. Inform the surgeon immediately.
B. Notify the circulating nurse.
C. Begin a systematic search for the missing sponge.
D. Document the discrepancy in the patient's record.
🟢B
