Hemocompatibility of carotid artery stents: alterations of the electrical parameters of erythrocyte cell membrane--a word of caution.
The hemocompatibility of standard surgical treatment of carotid artery disease through the insertion of metallic stents is investigated by means of radio wave dielectric spectroscopy technique that allows the measurements of the electrical parameters of the red blood cell membrane. Our measurements suggest that both the membrane permittivity and the membrane conductivity, which characterize the overall electrical behavior of the cell membrane, undergo an appreciable alteration of their standard values as a consequence of the stent insertion. These alterations persist over long period of time, up to 4 weeks. Even if these effects could not cause any evident damage at physiological or clinical level to the patient, the presence of a host response to the stent implant suggests that a full hemocompatibility has not yet reached, and a word of caution is necessary.
Clinica Chirurgica II, Università di Roma La Sapienza, Rome, Italy.
Antonio
A
Basoli
Cesare
C
Cametti
Vittorio
V
Faraglia
Tommaso
T
Gili
Luigi
L
Rizzo
Maurizio
M
Taurino
D017130:Angioplasty / Q000009:adverse effects / Q000295:instrumentation*; D001672:Biocompatible Materials; D002340:Carotid Artery Diseases / Q000097:blood / Q000601:surgery*; D004553:Electric Conductivity; D017097:Electric Impedance; D004910:Erythrocyte Membrane / Q000473:pathology*; D006801:Humans; D008670:Metals; D018570:Risk Assessment; D013057:Spectrum Analysis; D015607:Stents / Q000009:adverse effects; D013997:Time Factors; D016896:Treatment Outcome
D001672:Biocompatible Materials; D008670:Metals