公开(公告)号：JPS6420469A

公开(公告)日：1989-01-24

申请号：JP10984588

申请日：1988-05-02

Applicant: ABBOTT LAB

Inventor： JIYON PASUTOROONE ,  MAIKERU ROORESU ,  JIYOOJI EICHI FUERINGAMU

IPC: A61B8/06 ,  A61M5/36 ,  G01N29/032 ,  G01N29/036 ,  G01N29/22 ,  G01N29/24 ,  G01N29/28 ,  G01N29/34 ,  G01N29/46 ,  G01S15/88

Abstract: PURPOSE: To detect if the air is mixed in an intravenous injection feeding tube by providing an ultrasonic transmitter and an ultrasonic receiver on both sides of a flow passage. CONSTITUTION: A cassette pump 10 forms a flow passage 40 by interposing an elastic member 16 between a front plate 12 and a rear plate 14. An injection is supplied to a patient from an injection source through a flowing-in port 18, the flow passage 40, and a flowing-out port. The passage 40 is bent in semicircular states in air detecting means 22 and 24 which are held in ultrasonic detectors 26 and 28 respectively having ultrasonic transmitters 54 and receivers 56 provided with piezoelectric chips 72 on substrates 58. The quantities of ultrasonic waves propagated to the receivers 56 from the transmitters 54 decrease when air exists in the flow passage 40. When the signal from the receiver 56 drops, an alarm device is actuated to stop the supply of the injection.

公开(公告)号：JPS645558A

公开(公告)日：1989-01-10

申请号：JP10984488

申请日：1988-05-02

Applicant: ABBOTT LAB

Inventor： JIYON PASUTOROONE ,  EDOWAADO REENEN ,  REERANDO DEI SHIYAMUNESU ,  JIYOOJI FUERINGAMU ,  UORUTAA ERU JIMISON

IPC: F04B43/02 ,  A61M1/00 ,  A61M5/142 ,  F04B49/03

Abstract: PURPOSE: To easily manufacture a pump cassette at a relatively low cost by forming it with a nearly hard or solid surface member, a hard or solid back member, and an elastomer diaphragm arranged between both members. CONSTITUTION: A surface member 12 is provided with a plunger opening 18 having an elastomer member 16 spread across it. A back member 14 is provided with an expanded recess 20 on the back of the plunger opening 18 to form a plunger chamber 22. When a fluid is to be pumped out from the chamber 22, a diaphragm crossing the opening 18 via the reciprocating motion of the plunger 24 in the opening 18 is thrust into or out of the chamber 22. When the plunger 24 is excited against the diaphragm, a pump chamber outlet valve actuator 26 is opened, a pump chamber inlet valve actuator 28 is closed, and the fluid is sent out from the chamber 22 via a cassette outlet 30.