Naslov
Properties of Ultrasonically Marked Leads

Autori
Breyer, Branko ; Ferek-Petrić, Božidar ; Čikeš, Ivo

Izvornik
Pacing and clinical electrophysiology (0147-8389) 12 (1989), 8; 1369-1380

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pregledni rad, znanstveni

Ključne riječi
pacing leads ; ultrasound ; electrophysiological leads ; safety ; ultrasonic guidance ; pacemaker follow-up

Sažetak
We have developed an ultrasonic marking system for pacing leads and Ihe eiectrophysiologicai study 0/ catiieters. The aim 0/ this study was to evaluate the accuracy of our system, its usability in the measurement 0/performance 0/implanted leads, and to investigate the potential o/eJectricai shock and ultrasonic hazard. The measurements have shown that different applications require specijic electronic design, involving some compromise between accuracy and sensitivity. A higher sensitivity at the beginning 0/ the uitrasonicaJiy guided cardiac lead impiantation yields poorer accuracy. Quantitative measurements show that accuracy can be subsequently improved by reduction 0/sensitivity of the marking system. The transponder marking circuit is better suited for general use and the passive electronic circuit is better suited for multiple electrode eiectrophysiologicai studies. Experiments concerning electrical safety show that in the worst failure case, the energy of the marking system released within the heart is <10'^ J per pulse within the pacing frequency spectrum and the current was below 50 microamperes. Ultrasound intensities were within the safety limits set by international and national organizations. The experiments using the marking system for detection of the pacing lead failure showed that the system can yield an early warning of the lead malfunction. The system con signi/icantly reduce the exposure of the medical staff and the patients to x rays as well as improve patient follow-up accuracy.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Kliničke medicinske znanosti

Napomena
Nagrada za znanstveni rad Nikola Tesla dodjeljena je
1985. godine znanstvenicima: Branku Breyeru, Ivi
Čikešu i Božidaru Ferek-Petriću za otkriće
ultrazvučno označenih katetera.

POVEZANOST RADA