1.
Cardiovasc Res
; 14(8): 490-4, 1980 Aug.
Artículo
en Inglés
| MEDLINE
| ID: mdl-7438151
RESUMEN
The flip-flop producing a pulse proportional to the transit time of an ultrasonic burst between two piezoelectric crystals was often reset by transmission artefacts in sonomicrometers. A design improvement was made. The insertion of two monostable vibrators and one nand gate corrected the resetting caused by transmission artefacts. The new design produced a flip-flop pulse that was proportional to the transit time of the ultrasonic burst through the aorta. Ascending aortic diameter was monitored in unanaesthetised dogs for 6 to 8 weeks using the new design.
Asunto(s)
Aorta/anatomía & histología , Ultrasonido/instrumentación , Ultrasonografía , Animales , Biometría , Perros , Electrónica Médica , Femenino , Masculino , Monitoreo Fisiológico/instrumentación
2.
Med Biol Eng
; 11(5): 656-7, 1973 Sep.
Artículo
en Inglés
| MEDLINE
| ID: mdl-4788895