Factors for sac size change of abdominal aortic aneurysm after endovascular repair.
OBJECTIVE
Factor(s) affecting the sac size of an abdominal aortic aneurysm (AAA) after endovascular aneurysm repair (EVAR) remain unclear. We compared the diameter of the aneurysm sac at one year after surgery with the preoperative diameter using CT images.


METHODS
Patients who underwent EVAR at Juntendo University Hospital were involved. According to the size change in treated lesions of the aorta, patients were categorized into the following 3 groups: shrink (&lt;5 mm of reduction), enlarge (&gt;5 mm of expansion), and no change (size change within 5 mm). The patients' background, laboratory data, devices used, medications, anatomical characteristics, and presence/absence of postoperative endoleaks were examined.


RESULTS
Of the 68 consecutive patients, 23 were excluded. Seventeen patients were classified into the shrink group, 28 patients into the no change group, and no patients into the enlarge group. Patients with higher thrombotic area rate on the preoperative AAA tended to present AAA sac shrinkage (p = 0.05). No other variables affected the size change in this study. In addition, the existence of an endoleak suggested the interference of sac shrinkage.


CONCLUSIONS
The higher AAA thrombotic area rate tended to associate with AAA sac shrinkage.
Department of Cardiovascular Surgery, Juntendo University, School of Medicine, Tokyo, Japan.
Yoshiaki
Y
Tsuyuki
Satoshi
S
Matsushita
Shizuyuki
S
Dohi
Taira
T
Yamamoto
Keiichi
K
Tambara
Hirotaka
H
Inaba
Atsushi
A
Amano
D000368:Aged; D000369:Aged, 80 and over; D017544:Aortic Aneurysm, Abdominal / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D001027:Aortography / Q000379:methods; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects; D057867:Endoleak / Q000175:diagnosis / Q000209:etiology; D057510:Endovascular Procedures / Q000009:adverse effects; D005260:Female; D006785:Hospitals, University; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D013927:Thrombosis / Q000175:diagnosis / Q000209:etiology; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome