CSFA CSFA Surgical Equipment and Technology 1 — Questions and Answers
Question 1: Before activating a pneumatic tourniquet, the surgical first assistant should confirm which critical parameter has been set correctly?
- Patient's blood type
- Inflation pressure appropriate for the patient's systolic blood pressure and limb occlusion pressure (Correct answer)
- Room temperature
- Anesthesia machine settings
Correct answer: Inflation pressure appropriate for the patient's systolic blood pressure and limb occlusion pressure
Tourniquet pressure is typically set 50–100 mmHg above systolic blood pressure or based on limb occlusion pressure to ensure complete arterial occlusion without excessive tissue damage.
Question 2: Which laparoscopic energy device uses ultrasonic vibration to simultaneously cut and coagulate tissue?
- Monopolar hook electrode
- Harmonic scalpel (ultrasonic dissector) (Correct answer)
- Bipolar LigaSure
- CO2 laser
Correct answer: Harmonic scalpel (ultrasonic dissector)
The Harmonic scalpel vibrates at 55,500 Hz, generating frictional heat that denatures proteins, sealing vessels while simultaneously cutting tissue.
Question 3: What is the maximum recommended safe intra-abdominal insufflation pressure during routine laparoscopic surgery in adults?
- 5–8 mmHg
- 10–12 mmHg
- 15 mmHg (Correct answer)
- 20–25 mmHg
Correct answer: 15 mmHg
Standard insufflation pressure for adult laparoscopy is 12–15 mmHg; pressures above 15 mmHg impair venous return and diaphragmatic excursion.
Question 4: A surgical robot's 'EndoWrist' instruments are designed to provide what advantage over straight laparoscopic instruments?
- Faster instrument exchanges
- Seven degrees of freedom with 360° articulation, mimicking open surgical hand movement (Correct answer)
- Elimination of the need for a sterile field
- Automatic suturing without surgeon input
Correct answer: Seven degrees of freedom with 360° articulation, mimicking open surgical hand movement
EndoWrist technology replicates the wrist's natural motion with multiple axes of movement, enabling complex dissection and suturing in confined spaces.
Question 5: Which gas is most commonly used for laparoscopic insufflation, and why?
- Oxygen — because it supports combustion and is inert
- Nitrous oxide — cheapest available gas
- Carbon dioxide — rapidly absorbed, non-combustible, and inexpensive (Correct answer)
- Nitrogen — provides the longest working time
Correct answer: Carbon dioxide — rapidly absorbed, non-combustible, and inexpensive
CO2 is preferred because it is non-flammable (safe with electrosurgery), rapidly absorbed by tissues if a gas embolism occurs, and cost-effective.
Question 6: What action should the surgical first assistant take when a smoke evacuator is not functioning during electrosurgical use?
- Continue using electrosurgery; smoke is not a hazard
- Pause electrosurgery and notify the team to address the evacuator before continuing, to protect all personnel from surgical plume (Correct answer)
- Increase the electrosurgical unit power setting
- Replace the grounding pad
Correct answer: Pause electrosurgery and notify the team to address the evacuator before continuing, to protect all personnel from surgical plume
Surgical smoke contains carcinogens, viable cellular material, and viral particles; OSHA guidelines require evacuation of surgical plume to protect OR personnel.
CSFA CSFA Surgical Equipment and Technology 1
Before activating a pneumatic tourniquet, the surgical first assistant should confirm which critical parameter has been set correctly?