Impact of the volume of aneurysmal contents on intraaneurysmal pressure after endovascular grafting (experimental studies).
With the purpose of clarifying the nature and outlining certain constituents of such an undesirable condition designated as "endotension", that emerges after transluminal grafting of the aneurysmally changed aorta, a basic theoretical model was worked out for explanation of "endotension". Also, there was designed and constructed in vitro an original experimental model using which the authors carried out a study into the relationship between the pressure in the aneurysm after its complete exclusion from the blood flow by an endovascular graft and the volume of the aneurysmal contents. Some factors described in the literature as influencing the pressure level in the aneurysm were at the given stage purposefully excluded. The volume of the "aneurysm" reproduced in our model was equal to 675 ml; each of five vascular grafts implanted into the aneurysm measured 110 mm in length. The pulsating liquid flow was reproduced in the system using a serial appliance for extracorporeal circulation. The liquid was aspirated from the aneurysm by means of a syringe with concurrent pressure guidance in the sac. To start pressure lowering, it was necessary to evacuate 0.4-1.6 ml of the liquid. The real clinical situations were considered from the standpoint of our results.
Kharkov Center of Cardiovascular Surgery, Ukraine. sv15@kharkov.com
S N
SN
Volodos'
R D
RD
Sayers
P R F
PR
Bell
J P
JP
Gostelow
D001014:Aortic Aneurysm / Q000097:blood / Q000503:physiopathology* / Q000601:surgery*; D001794:Blood Pressure; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation; D001809:Blood Viscosity; D006801:Humans; D008955:Models, Cardiovascular; D008961:Models, Structural; D011138:Polytetrafluoroethylene; D011312:Pressure
D011138:Polytetrafluoroethylene