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66

R. Jamjoom et al.

 

 

Fig. 6.1  CTA of chest demonstrating 7.3 cm TAA in size

Question 2

What are the contraindications for standard TEVAR?

A.  Diseased (<7mm) external iliac artery

B.  No landing zone distal to the subclavian (<2cm)

C.  Concurrent abdominal aortic aneurysm

D.  Circumferential thrombus in proximal and distal landing zones

Question 3

How would you position the patient in the operating room?

A.  Supine with bilateral arm extension (90°)

B.  Supine with left arm tucked in and right arm extended C.  Supine with both arms tucked in

D.  Supine with right arm tucked in and left arm extended

Right common femoral artery exposure is performed and arterial access is gained for positioning of the extra-stiff 260–300 cm guide wire.

Question 4

Optimal distal position of the tip of the stiff wire is:

A.  Distal to subclavian

B.  In the left ventricle

6  Endovascular Management of Thoracic Aneurysm

67

 

 

C.  Above the aortic valve D.  Proximal to subclavian

In the left groin you place a percutaneous 5Fr sheath and place the pigtail catheter in the ascending aorta.

Question 5

What are possible intra-operative complications of TEVAR?

Question 6

What are the options to induce hypotension during graft deployment to ensure accurate placement?

A.  Rapid ventricular pacing B.  Administration of Adenosine C.  Administration of nitrates

D.  Partial right atrial inflow balloon occlusion

Question 7

List possible methods to prevent spinal cord ischemia during and after TEVAR?

Question 8

What are the most important parameters to observe in the early postoperative period?

A.  Neurological exam B.  Renal function

C.  Compartment syndrome D.  Cardiac enzymes

Question 9

How would you follow up your patient postoperatively?

A.  Chest X-ray and renal function at 6 weeks and every 3 month

B.  CTA and renal function at 3, 6 and 12 months, then every 12 month C.  CTA and renal function every 6 month

D.  Abdominal ultrasound and chest X-ray every 6 month

68

R. Jamjoom et al.

 

 

A76-yearoldmale,otherwisehealthy,issenttoyourclinicafteranincidental­finding of TAA during investigation of a possible pulmonary embolus. Subsequent CTA is ordered and is shown in Fig. 6.2

Fig. 6.2  CTA of chest demonstrating TAA 6.2 cm in size, starting just proximal to the subclavian artery. The distance between the left common carotid and left subclavian is 1.5 cm and between the left subclavian and innominate is 2.5 cm

Question 10

What is your endovascular option of treatment?

A.  Direct antegrade bypass to the left common carotid artery and the subclavian artery from the ascending thoracic aorta and TEVAR

B.  Right to left carotid-carotid bypass and left carotid subclavian bypass and TEVAR C.  Carotid subclavian bypass and TEVAR

D.  Transposition of the subclavian to the carotid artery and TEVAR

Question 11

What is another important investigation you need to do before proceeding with your bypass?

A.  MRI brain B.  ABI

C.  Carotid Duplex ultrasound D.  Abdominal ultrasound

You have obtained a Carotid Duplex ultrasound that shows no significant stenosis.

Question 12

In which circumstances is left carotid subclavian bypass strongly recommended before covering the left subclavian artery?

6 Endovascular Management of Thoracic Aneurysm

69

 

 

A.Dominant left vertebral artery

B.History of CABG using LIMA

C.Covering more than 20 cm of thoracic aorta

D.Left carotid stenosis > 80%

You perform a carotid–carotid bypass and carotid–subclavian bypass with ligation of the proximal left carotid and endovascular occlusion of the subclavian artery proximal to the left vertebral artery. Two weeks later you book your patient for TEVAR under general anesthesia. Pre-deployment angiogram is demonstrated in Fig. 6.3.

Question 13

What are the advantages of staged procedures?

You were successful with the procedure and your completion intraoperative angiogram is shown in Fig. 6.4. Patient is discharged 2 days postoperatively and booked for a followup CTA in 3 months.

Fig. 6.3 Intraoperative angiography, demonstrating the TAA and right carotid to left carotid and subclavian bypass

Fig. 6.4 Intraoperative completion angiography

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