| 摘要 |
PCT No. PCT/EP88/00062 Sec. 371 Date Nov. 22, 1988 Sec. 102(e) Date Nov. 22, 1988 PCT Filed Jan. 27, 1988 PCT Pub. No. WO88/05314 PCT Pub. Date Jul. 28, 1988.A dispensing device for use in an implantable drug delivery system for ambulatory patients comprises a pump in a drug reservoir and a piezoelectric disc element bonded to a diaphragm member forming one wall of a pump chamber and a battery and electrical circuits for cyclically applying electrical voltage to the piezoelectric member for inducing pumping movement in the diaphragm member to pump drugs from a reservoir via a valve and to a delivery catheter via another valve. A gas spring is provided to move the pump to maintain adequate pressure in the drug reservoir.
|
