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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
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External Stenting (Exostenting) to Correct Vascular Torsion and Angulation.

Michael B Silva1, Muhammad Shoaib2,3,4, Santiago J Miyara3,5

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The International Journal of Angiology : Official Publication of the International College of Angiology, Inc
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Vascular complications like vessel torsion and angulation can jeopardize organ transplants. A novel exostenting technique using a synthetic graft successfully corrected severe external iliac artery kinking in a kidney transplant recipient.

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exostentingexternal stentingkidneyorgan compromisesupporttorsiontortuositytransplantvascularvessel

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Area of Science:

  • Vascular Surgery
  • Transplant Surgery
  • Biomedical Engineering

Background:

  • Vascular torsions and angulations are significant complications in organ transplantation.
  • These abnormalities can compromise vessel integrity, obstruct blood flow, and lead to organ loss.
  • Existing methods like organ repositioning or using fat pads have limitations for severe cases.

Purpose of the Study:

  • To introduce and evaluate a novel exostenting technique for correcting severe vascular torsions and angulations in organ transplantation.
  • To demonstrate the application of this technique in a kidney transplant scenario with external iliac artery compromise.

Main Methods:

  • A technique involving a longitudinally opened, rigid synthetic graft (ringed polytetrafluoroethylene) used as an external stent (exostent).
  • The exostent is placed around the angulated or torsioned vessel to maintain its patency and correct the deformity.
  • Illustrated in a kidney transplant recipient with severe external iliac artery torsion/angulation unresponsive to other measures.

Main Results:

  • Successful correction of severe external iliac artery torsion/angulation using the exostenting technique.
  • Avoidance of more invasive procedures such as organ reimplantation or vessel resection.
  • The method provided a stable correction without compromising vascular integrity.

Conclusions:

  • Exostenting with a rigid synthetic graft is an effective and minimally invasive strategy for managing severe vascular torsions and angulations in transplantation.
  • This technique offers a valuable alternative when conventional methods fail.
  • The approach is potentially applicable to various vessels and transplant types facing similar vascular challenges.