CSFA Intraoperative Procedures and Techniques 4 — Questions and Answers
Question 1: During a mastectomy with sentinel lymph node biopsy, the blue-stained lymph node is identified but appears to be in close proximity to the axillary vein. What is the first assistant's primary responsibility at this moment?
- Immediately clamp the node and divide it
- Provide meticulous retraction and clear visualization to protect the vein during dissection (Correct answer)
- Inject additional blue dye to confirm mapping
- Place a vessel loop around the axillary vein as a precaution
Correct answer: Provide meticulous retraction and clear visualization to protect the vein during dissection
The first assistant's primary role is to provide optimal retraction and exposure so the surgeon can safely dissect the sentinel node away from the axillary vein.
Question 2: What does the term 'cystotomy' refer to in the context of intraoperative technique?
- Incision into the common bile duct
- Incision into the urinary bladder or cystic structure (Correct answer)
- Removal of a cyst via enucleation
- Creation of a stoma from the cyst to skin
Correct answer: Incision into the urinary bladder or cystic structure
Cystotomy is the surgical incision into the bladder or any cystic structure, commonly performed for stone removal or intravesical procedures.
Question 3: During a laparoscopic appendectomy, the surgical first assistant is using an endoscopic stapler to divide the mesoappendix. The stapler fires but the tissue appears inadequately transected. What is the correct next step?
- Fire the stapler a second time immediately on the same tissue
- Notify the surgeon and evaluate the staple line before proceeding (Correct answer)
- Apply an endoclip across the mesoappendix proximal to the staple line
- Proceed with transection using monopolar scissors
Correct answer: Notify the surgeon and evaluate the staple line before proceeding
A misfire or incomplete staple line requires stopping to assess the situation with the surgeon before any further action to prevent hemorrhage or incomplete division.
Question 4: When assisting during an open inguinal hernia repair using the Lichtenstein tension-free mesh technique, the mesh is anchored along the inguinal ligament using which suture material?
- Chromic catgut (absorbable)
- Monofilament permanent or slowly absorbable suture (Correct answer)
- Braided polyester (Ethibond)
- Rapidly absorbable polyglactin (Vicryl Rapide)
Correct answer: Monofilament permanent or slowly absorbable suture
Permanent or slowly absorbable monofilament suture secures the mesh to the inguinal ligament to ensure durable fixation without long-term foreign body braided suture issues.
Question 5: A patient undergoing a total knee arthroplasty has a tourniquet applied to the upper thigh. The surgical first assistant is asked to set the tourniquet pressure. What is the standard recommended tourniquet pressure for a lower extremity procedure?
- 50 mmHg above systolic blood pressure
- 100–150 mmHg above systolic blood pressure (Correct answer)
- A fixed 250 mmHg regardless of patient blood pressure
- Equal to the patient's mean arterial pressure
Correct answer: 100–150 mmHg above systolic blood pressure
Tourniquet pressure for the lower extremity is typically set 100–150 mmHg above systolic pressure to ensure arterial occlusion while minimizing tissue damage.
Question 6: During a right hemicolectomy, the ileocolic artery is divided. Which structure must the surgical first assistant be careful to avoid injuring during retroperitoneal dissection at this step?
- Superior mesenteric vein
- Right ureter as it crosses over the iliac vessels (Correct answer)
- Gonadal vessels
- Inferior mesenteric artery
Correct answer: Right ureter as it crosses over the iliac vessels
The right ureter runs retroperitoneally and crosses over the right iliac vessels; it is at risk during right colectomy mesenteric dissection.
Question 7: When assisting with a free tissue transfer (free flap), the most critical intraoperative parameter the surgical first assistant should help maintain throughout the microsurgical anastomosis is:
- Patient core temperature below 35°C to reduce metabolic demand
- Adequate systemic perfusion pressure and avoidance of vasopressors (Correct answer)
- Tight glycemic control with insulin infusion
- High-dose anticoagulation with heparin boluses every 30 minutes
Correct answer: Adequate systemic perfusion pressure and avoidance of vasopressors
Adequate perfusion pressure without vasoconstrictors is essential for free flap survival; vasopressors can cause anastomotic spasm and flap failure.
CSFA Intraoperative Procedures and Techniques 4
During a mastectomy with sentinel lymph node biopsy, the blue-stained lymph node is identified but appears to be in close proximity to the axillary vein.
What is the first assistant's primary responsibility at this moment?