Development of a fully implantable wireless pressure monitoring system.
A fully implantable wireless pressure sensor system was developed to monitor bladder pressures in vivo. The system comprises a small commercial pressure die connected via catheter to amplifying electronics, a microcontroller, wireless transmitter, battery, and a personal digital assistant (PDA) or computer to receive the wireless data. The sensor is fully implantable and transmits pressure data once every second with a pressure detection range of 1.5 psi gauge and a resolution of 0.02 psi. In vitro calibration measurements of the device showed a high degree of linearity and excellent temporal response. The implanted device performed continuously in vivo in several porcine studies lasting over 3 days. This system can be adapted for other pressure readings, as well as other vital sign measurements; it represents the first step in developing a ubiquitous sensing platform for telemedicine and remote patient monitoring.
Tan
Robert
R
Department of Bioengineering, University of California, Los Angeles, CA, 90095, USA.
McClure
Timothy
T
Lin
C K
CK
Jea
David
D
Dabiri
Foad
F
Massey
Tammara
T
Sarrafzadeh
Majid
M
Srivastava
Mani
M
Montemagno
C D
CD
Schulam
Peter
P
Schmidt
Jacob
J
D000818:Animals; D003201:Computers; D005260:Female; D008991:Monitoring, Physiologic / Q000295:instrumentation* / Q000379:methods*; D011312:Pressure; D019736:Prostheses and Implants; D013552:Swine; D014160:Transducers, Pressure; D001743:Urinary Bladder / Q000503:physiopathology*