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Purpose <p>To evaluate the intra-aneurysm pressure (IAP) after the implantation of various off-the-shelf endovascular aneurysm repair (EVAR) devices and examine its clinical implications.</p> Methods <p>A retrospective review of 153 EVAR cases for infrarenal abdominal aortic aneurysm (AAA) with bilateral common iliac landings and no residual type I/III endoleaks was conducted. During EVAR, the IAP and abdominal aortic pressure (AAP) were measured, and the aorta–aneurysm systolic pressure gradient (AASPG = systolic AAP − systolic IAP) was compared among the devices and between the graft fabric materials. The associations between the AASPG and postoperative AAA shrinkage were also assessed.</p> Results <p>The AASPGs (mmHg) for the devices were as follows: Aorfix (34 cases), 17.8 ± 12.9; Endurant (32 cases), 22.3 ± 16.9; AFX (26 cases), 17.5 ± 18.0; Zenith Alpha (20 cases), 25.7 ± 16.3; Excluder (16 cases), 26.4 ± 19.7; TREO (13 cases), 30.5 ± 11.8; and Alto (12 cases), 37.7 ± 14.5 (<i>p</i> = 0.002). Polytetrafluoroethylene grafts showed a higher AASPG than woven polyester grafts (31.3 vs. 22.5 mmHg, <i>p</i> = 0.009). No significant association was observed between the AASPG and AAA shrinkage.</p> Conclusion <p>The degree of IAP reduction differs according to the EVAR device and graft fabric material. These findings provide baseline data on the device-specific effects of IAP.</p>

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Comparison of the intraoperative intra-aneurysm pressure gradients among seven off-the-shelf endovascular aneurysm repair devices

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Kenichi Kato,
  • Yoshihiko Kurimoto,
  • Ryushi Maruyama,
  • Mika Yamamoto,
  • Keita Sasaki,
  • Takahiko Masuda,
  • Naritomo Nishioka,
  • Shuichi Naraoka

摘要

Purpose

To evaluate the intra-aneurysm pressure (IAP) after the implantation of various off-the-shelf endovascular aneurysm repair (EVAR) devices and examine its clinical implications.

Methods

A retrospective review of 153 EVAR cases for infrarenal abdominal aortic aneurysm (AAA) with bilateral common iliac landings and no residual type I/III endoleaks was conducted. During EVAR, the IAP and abdominal aortic pressure (AAP) were measured, and the aorta–aneurysm systolic pressure gradient (AASPG = systolic AAP − systolic IAP) was compared among the devices and between the graft fabric materials. The associations between the AASPG and postoperative AAA shrinkage were also assessed.

Results

The AASPGs (mmHg) for the devices were as follows: Aorfix (34 cases), 17.8 ± 12.9; Endurant (32 cases), 22.3 ± 16.9; AFX (26 cases), 17.5 ± 18.0; Zenith Alpha (20 cases), 25.7 ± 16.3; Excluder (16 cases), 26.4 ± 19.7; TREO (13 cases), 30.5 ± 11.8; and Alto (12 cases), 37.7 ± 14.5 (p = 0.002). Polytetrafluoroethylene grafts showed a higher AASPG than woven polyester grafts (31.3 vs. 22.5 mmHg, p = 0.009). No significant association was observed between the AASPG and AAA shrinkage.

Conclusion

The degree of IAP reduction differs according to the EVAR device and graft fabric material. These findings provide baseline data on the device-specific effects of IAP.