Apparatus for delivering fluid to a patient

• US 5,649,810 A
• Filed: 06/07/1995
• Issued: 07/22/1997
• Est. Priority Date: 11/28/1994
• Status: Expired due to Term

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Sherwood Medical Company (Medtronic Plc)
• Inventors: Krohn, Randall J., Schweitzer, Frederick F. Jr., Walker, Clarence L.
• Primary Examiner(s): FREAY, CHARLES GRANT
• Application Number:
  US08/481,592
• Time in Patent Office: 776 Days
• Field of Search: 417/63, 417/290, 417/298, 417/305, 417/505, 137/454.2, 137/454.4, 251/129.11, 604/151, 604/152, 604/153, 604/154, 604/155
• US Class Current: 417/298
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 39/223 Multiway valves
• 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 5/16827 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 5/36 with means for eliminating or preventing injection or infusion of air into body dialysis systems, blood oxygenators A61M1/14; haemofiltration equipment A61M1/34; automatic tube cut-off A61M39/281
• CPC Class Codes: Y10T 137/7559 Pump type

Abstract

A fluid delivery system is disclosed which includes a pump and a fluid delivery set. The fluid delivery set includes a stop cock valve, and the pump includes a valve actuation unit into which the stop cock valve is positioned for operation of the system. The valve actuation unit includes a valve receiving mechanism which requires the valve to be closed in order to be inserted into or removed from the valve actuation unit, thereby preventing accidental free flow of fluid at all times. The fluid delivery set may also include an auxiliary fluid source to allow periodic flushing of the fluid delivery line, and the valve actuation unit can be programmed by the pump to automatically initiate periodic flushing cycles if desired.

Claims

1. A fluid flow control system including a fluid flow control valve and a valve actuation device for automatic operation of the fluid flow control valve, said fluid flow control system comprising:

a valve actuation device having a valve receiving mechanism for receiving a valve handle of said fluid flow control valve for actuation, and a valve interface member for insuring proper orientation of said fluid flow control valve relative to said valve receiving mechanism when said valve handle of said fluid flow control valve is inserted into said valve of receiving mechanism; and

said fluid flow control valve having a valve body having at least one inlet port and at least one outlet port, and a valve stem positioned at least partially within said valve body and including said handle, said valve stem including at least one fluid flow passage therethrough, said handle being insertable into said valve receiving mechanism and said valve stem being rotatable relative to said valve body by rotation of said handle by said valve receiving mechanism between a closed position in which fluid flow between said at least one inlet port and said at least one outlet port is prevented, and an open position in which said at least one fluid flow passage connects said at least one inlet port with said at least one outlet port for fluid flow therethrough;

whereby, said valve receiving mechanism operates to move said valve handle between said at least one closed position to said at least one open position.

2. A fluid flow control system according to claim 1 wherein said valve interface member allows said fluid flow control valve to be received by said valve receiving mechanism only when said fluid flow control valve is in said at least one closed position.

3. A fluid flow control device according to claim 1 wherein said valve interface member allows said fluid flow control valve to be removed from said valve receiving mechanism only when said fluid flow control valve is in said at least one closed position.

4. A fluid flow control device according to claim 1 wherein said valve receiving mechanism further includes a chuck member positioned to contact said handle of said fluid flow control valve when properly positioned within said valve receiving mechanism, and an activation switch for activating rotation of said chuck;

whereby, proper positioning of said fluid flow control valve within said valve receiving mechanism causes said chuck to contact said activation switch and rotate said valve handle to said at least one open position.

5. A fluid flow control device according to claim 4 wherein said valve receiving mechanism and said valve interface member operate to retain said valve handle within said valve receiving mechanism whenever said valve receiving mechanism has operated to move said valve handle to said at least one open position.

6. A fluid flow control device according to claim 1 wherein said valve interface member is detachable from said valve actuation device.

7. A fluid flow control device according to claim 6 wherein detachment of said valve interface member exposes at least a portion of said valve receiving mechanism.

8. A fluid flow control device according to claim 1 wherein said valve handle and said valve receiving mechanism have identical cross-sectional shapes such that said valve handle can be inserted into said valve receiving mechanism in only a single relative orientation.