Monitoring hemodialysis vascular access by digital phonoangiography.
We are intrigued by the possibility of using digital spectral analysis to detect hemodialysis vascular access stenosis. Such a monitor could be inexpensive, noninvasive, and portable enough to allow continuous monitoring. This report suggests how individuals wishing to conduct such research can use a simple but effective transducer design we have employed, how the data so obtained can be analyzed in the time and frequency domains using inexpensive digital signal processing software available via the Internet, and how data recordings might be shared via the Internet to facilitate collaboration.
Doyle
D John
DJ
Cleveland Clinic Foundation, OH 44195, USA. djdoyle@inforamp.net
Mandell
Daniel M
DM
Richardson
Robert M
RM
D001166:Arteriovenous Shunt, Surgical / Q000009:adverse effects / Q000379:methods; D001314:Auscultation / Q000295:instrumentation* / Q000379:methods; D001783:Blood Flow Velocity; D002408:Catheters, Indwelling / Q000009:adverse effects; D003251:Constriction, Pathologic / Q000175:diagnosis / Q000209:etiology; D003299:Cooperative Behavior; D016208:Databases, Factual; D004867:Equipment Design; D006083:Graft Occlusion, Vascular / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D020407:Internet; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods; D006435:Renal Dialysis / Q000009:adverse effects / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D019023:Stethoscopes; D014159:Transducers