Infusion apparatus

• US 5,057,076 A
• Filed: 10/29/1990
• Issued: 10/15/1991
• Est. Priority Date: 11/28/1989
• Status: Expired due to Fees

• Current Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Original Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Inventors: Polaschegg, Hans D.
• Primary Examiner(s): Hirsch, Paul J.
• Application Number:
  US07/604,961
• Time in Patent Office: 351 Days
• Field of Search: 604/131, 604/65, 604/67, 604/66, 128/DIG. 13
• US Class Current: 604/67
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16886 for measuring fluid flow rate, i.e. flowmeters
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: Y10S 128/13 Infusion monitoring

Abstract

This invention relates to an apparatus for dosed, continuous and simultaneous infusion operations. To prevent an uncontrolled flow through the conveying conduits, which can above all occur during the installation of a flexible tube into or its removal from a peristaltic pump due to the action of gravity, the invention provides a valve (5, 6) which is positioned in the conveying conduit of the peristaltic pump and operatively connected to a door detector of the pump in such a way that the valve is closed when the door is opened, and opened when the door is closed.

Claims

1. An apparatus for the dosed, continuous and simultaneous infusion of a plurality of infusion solutions or medicament solutions, comprising at least one pump (1, 2) respectively provided with a housing and a door, conveying conduits (18-21) which pass from containers containing said infusion solutions or medicament solutions and are connected via a transition member to a common patient'"'"'s conduit (23), valves (5-12) provided in each of said conveying conduits, a flow sensor (14) provided in said patient'"'"'s conduit (23) for sensing the flow rate, and a control unit operatively connected to said valves (5-12), said pump (1, 2) and said flow sensor (14), said flow sensor (14) being arranged downstream of said pump, and said control unit initiating the closure of said valves (5-12) upon detection of a fluid stop by said flow sensor (14),

characterized in that a said valve (5, 6) provided in said conveying conduit of a said peristaltic pump (1, 2) is operatively connected to a door detector of said associated pump (1, 2) in such a way that said valve (5, 6) is closed when said door is opened, and opened when said door is closed.

2. An apparatus according to claim 1, characterized in that said valve (5, 6) is electrically actuable.

3. An apparatus according to claim 1, characterized in that said valve (5, 6) is mechanically actuable.

4. An apparatus according to claim 3, characterized in that said valve is integrated into said pump and actuable by means of said door.

5. An apparatus according to claim 3 or 4, characterized in that said valve (5, 6) consists of a spring element (40) which clamps off said conveying conduit in the opened state of said door and can be expanded for releasing said conveying conduit when said door is closed.

6. An apparatus according to claim 5, characterized in that said spring element (40) rests on an abutment at the side facing away from said door.

7. An apparatus according to claim 1 or 2, characterized in that said valve (5, 6) is an electrically switchable valve which is in the closed position in the currentless state.

8. An apparatus according to claim 7, characterized in that said door detector is connected to said valve (5, 6) via said control unit.

9. An apparatus according to claim 1, characterized in that said valve (5, 6) is integrally formed with said valve arranged in said conveying conduit.

10. An apparatus according to claim 1, characterized in that said valve (5, 6) is formed as a separate valve.