AAA: Abdominal Aortic Aneurysm. They are also called infrarenal abdominal aortic aneurysms.
ANEURYSM: Is the dilation of an artery
SELFEXPANDABLE: Name given to an endoprosthesis where its machanical nature expand themselves inside the body.
NECK: The distance between renal arteries and the beginning of the renal arteries.The following characteristics are to be considered about aneurysmatic necks:
Short neck: Sanitary authoruties in different countries established minimal lengths to accept the implant of an aortic endograft for the treatment of abdominal aortic aneurysms. The minimal length for the implant of an selfexpandable endograft is 15 mm. When shorter, it is considered inapropriate for the implant of a selfexpandable graft. There are some cases in which the neck is virtually unexistent, they are called “Zero” neck.
Angled neck: The axis of the anurysm and the axis of its neck compose a measurable angle. It is said that the neck is angled when it is over 60°.
- Neck dilation: Scientific papers have described a phenomenon consisting in the dilation of the aortic necks after the implant of selfexpandable endografts.The aortic necks, undergoing a continuous expanding radial forces by the selfexpandable endografts suffer dilation.
ENDOLEAK: It is the name of flow persistently running outside the lumen of the endograft to the inside part of the aneurysmatic sac. There are four types of endoleaks:
- Type 1: Caused by failing seal-adhesion or exclusion of the aneurysm either proximal or distal.
- Type 2: Entrance of retrograde blood flow to the aneurysmatic sac through a lumbar or mesenteric patent artery.
- Type 3: Caused by rupture or tear of the material of the graft, not only due to material fatigue but also the disconnection of the components of a modulardevice.
- Type 4: Presence of contrast outside the lumen of the graft which is presumed to be a difussion through the pores of the prostetic material. It usually desappears after a few minutes.
ENDOGRAFTS: In a generis way it is the name given to implantable grafos by means of minimally invasive surgery
STENOSIS: pathologic narrowing of the lumen of a vessel
BALLOON EXPANDABLE: Devices placed and implanted by using of a baloon that is inflated inside the body
FENESTRATED:When an aneurysm involves the ostium of an important artery such as renal arteries or superior mesenteric artery, the implant of a standard endograft might occlude its flow. To avoid this situation fenestrated endografts were designed where the method of implant allows the arterial branches to be perfused.They are custom manufactured endografts.
LEAK: The filling of the aneurysmal sack after the implant of an endograft. They classify in relation to the cause or in relation to the moment they occurred. Thus they can be:
- Early: The endoleak is defined as an early one when it occurs immediately after the implantation of the endograft.
- Late: The endoleak is defined as an late one when it occurs 6 months after the implantation of the endograft.
CUSTOM MADE: Some aneurysms present some unusual characteristics that make impossible the endovascular treatment with standard endografts. In this cases, and according to the medical studies, a specific graft to suit the requirements is especially designed. This are called custom made endografts.
MIGRATION: Movement of the endograft from the original place where it was implanted.
NON-ABSORBENT: This is the name given to biomedical devices that, after being implanted on the body, remain unchanged through time.
SEMI-ABSORBENT: This is the name given to biomedical devices that are partialy resorbed after being implanted in the human body.
STENT GRAFT: The combination of a metalic skeleton (stent) and a prosthetic mesh (graft) result in an endoprosthesis called stent graft.