公开(公告)号：IT1170749B

公开(公告)日：1987-06-03

申请号：IT4787981

申请日：1981-02-24

Applicant: ANDROS INC

Inventor： JASSAWALLA JAL S ,  CHEN HERBERT

IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  F04B43/08 ,  A61M

公开(公告)号：CA1148824A

公开(公告)日：1983-06-28

申请号：CA371814

申请日：1981-02-26

Applicant: ANDROS INC

Inventor： JASSAWALLA JAL S ,  CHEN HERBERT

IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  F04B43/08 ,  A61M5/14

Abstract: MEDICAL INFUSION SYSTEM AND METHOD OF OPERATION A medical infusion system is described emploting a pump and cassette combination for conducting fluid or semi-solids from an upstream portion to a downstream portion of the system. The cassette includes a rigid enclosure defining a pumping cavity and has a window with a diaphragm spanning the window. The diaphragm is engaged by an actuator on the pump for varying the volume of the pumping cavity, Restrictors at the upstream and downstrem portions close off and open, respectively, the flow into and out of the pumping cavity in a sequence related to the actuator movement such that the pumping cavity alternately is filled and substantially emptied. To minimize the detrimental effects of air in the pumping cavity: 1) the actuator is operated to substantially increase the volume of the pumping cavity prior to opening of the upstream portion; and 2) the actuator is operated to reduce the volume of the pumping cavity to a residual volume of less than about 0.07 ml subsequent to closing of the upstream portion and opening of the downstream portion.

公开(公告)号：CA1148431A

公开(公告)日：1983-06-21

申请号：CA371831

申请日：1981-02-26

Applicant: ANDROS INC

Inventor： JASSAWALLA JAL S ,  CHEN HERBERT

IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  A61M5/14

Abstract: MEDICAL INFUSION SYSTEM A medical infusion system is described employing a pump and cassette combination for conducting fluid or semisolids from an upstream portion to a downstream portion of the system. The cassette includes a rigid enclosure defining a pumping chamber and has a window with a diaphragm spanning the window. The diaphragm is engaged by means on the pump for varying the volume of the pumping chamber. The configuration of the cassette is such that the outlet for the pumping chamber is located at the top of the pumping cavity and the internal configuration of the cavity causes gas bubbles to migrate to the outlet opening. A passage communicates between the outlet opening and a location proximate to the lower portion of the cassette.

公开(公告)号：CA1127491A

公开(公告)日：1982-07-13

申请号：CA306306

申请日：1978-06-27

Applicant: ANDROS INC

Inventor： JASSAWALLA JAL S

IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  F04B43/08 ,  A61M5/14

Abstract: A medical infusion system is described employing a pump for conducting fluid or semi-solids from an upstream portion to a downstream portion of the system. The pump includes conduit means defining, in part, a removable cassette having a window therein and a diaphragm spanning the window. The casette has inlet and outlet openings valvelessly communicating with the pumping chamber or cavity of an opening the conduit means at three different locations, one of which is before the casette and one of which is after the casette and the third of which is at the diaphragm of the casette.

公开(公告)号：IT8147879D0

公开(公告)日：1981-02-24

申请号：IT4787981

申请日：1981-02-24

Applicant: ANDROS INC

Inventor： JASSAWALLA JAL S ,  HERBERT CHEN

IPC: A61M1/00 ,  A61M5/142 ,  F04B43/00 ,  F04B43/08 ,  A61M

公开(公告)号：CA1064792A

公开(公告)日：1979-10-23

申请号：CA258024

申请日：1976-07-28

Applicant: ANDROS INC

Inventor： PORTNER PEER M ,  JASSAWALLA JAL S

IPC: A61M5/142 ,  A61M5/172 ,  A61M5/00

Abstract: An intravenous and intra arterial delivery system is described having a disposable cassette actuated by a pump and control electronics for providing positive but variable delivery rates. The cassette is self-priming and provides protection against the delivery of air by being unable to impel air, and means provide an indication of excessive air in the cassette. The electronics has low power consumption so as to be suitable for battery operation, such as by way of rechargeable batteries. A pressure sensor in the delivery line may be used to sense infiltration. The system further features a provision for predetermining the amount of fluid to be delivered, and a detection system for detecting an empty supply bottle.

公开(公告)号：CA1139174A

公开(公告)日：1983-01-11

申请号：CA346522

申请日：1980-02-27

Applicant: ANDROS INC

Inventor： PORTNER PEER M ,  JASSAWALLA JAL S

IPC: A61M1/00 ,  A61M5/00 ,  A61M5/142 ,  A61M5/152 ,  A61M7/00

Abstract: IMPLANTABLE INFUSION DEVICE Multiple embodiments of an implantable infusion device for delivering precisely regulated dosages of drugs are disclosed, each device including reservoir means (16) for containing the drug, catheter means (22) for delivering the drug to the body and an actuating means (44) which is responsive to a signal applied externally of the body for initiating delivery of a precisely regulated dosage. In one embodiment, the device is implanted subcutaneously to permit actuation by a solenoid driven element responsive to coded telemetry signal applied through the skin. In additional embodiments, the reservoir is pressurized for example, by means of vapor pressure or a mechanical spring, the drug under pressure in the reservoir being released in response to an externally applied signal.