Blood infusion pump

• US 4,430,078 A
• Filed: 04/24/1981
• Issued: 02/07/1984
• Est. Priority Date: 04/24/1981
• Status: Expired due to Fees

• Current Assignee: Leland L. Sprague
• Original Assignee: Leland L. Sprague
• Inventors: Sprague, Leland L.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US06/257,325
• Time in Patent Office: 1,019 Days
• Field of Search: 128/214 F, 128/214 E, 128/DIG. 12, 222/94-96, 222/105, 604/140-141, 604/118
• US Class Current: 604/141
• CPC Class Codes: A61M 5/1483 using flexible bags externally pressurised by fluid pressure
• CPC Class Codes: Y10S 128/12 Pressure infusion

Abstract

A blood infusion pump designed to be employed in combination with a blood bag. The blood bag is located within a storage container. The storage container includes an inflatable bladder. Pressurized fluid is to be conducted within the inflatable bladder which presses against the blood bag to cause discharge of the blood from the blood bag through a discharge conduit assembly. The container which contains a supply of pressurized fluid is mounted within the housing of the pump of this invention and is connected to the inflatable bladder. There is an access door into the storage chamber, which when opened, prevents the conducting of pressurized fluid to the inflatable bladder through a valve assembly and the simultaneous venting of the inflatable bladder to the ambient.

Claims

1. In combination with a blood bag, a blood infusion pump comprising:

a housing, said housing including a storage chamber for locating said blood bag;

pressure applying means for applying an evenly distributed force to said blood bag; and

pressure supply means for supplying a pressurized fluid through a conduit assembly to said pressure applying means, said pressure supply means comprising a container containing a quantity of pressurized fluid, said container being removable and replaceable within said housing, a valve assembly connected to said conduit assembly, said valve assembly to connect with said container to thereby supply the pressurized fluid from said container into said conduit assembly, said valve assembly being continuously spring biased into an airtight relationship with said container, said valve assembly being movable a limited amount in respect to said conduit assembly so as to positively engage in said airtight relationship with said container, whereby said pressurized fluid is conducted to said pressure applying means which causes blood to be discharged from said blood bag.

2. The combination as defined in claim 1 wherein:

said housing including a door, said door being openable to permit access into said storage chamber, latching means mounted on said housing, said latching means for maintaining said door in the closed position.

3. The combination as defined in claim 1 including:

a pressure regulator, said pressure regulator to be manually setable to different fluid pressure levels, whereby the greater the fluid pressure level also the greater the flow of blood through said discharge conduit assembly.

4. The combination as defined in claim 2 wherein:

a pressure release valve located within said discharge conduit assembly, said pressure release valve to release fluid pressure from said pressure applying means when said access door is opened.

5. The combination as defined in claim 1 wherein:

said pressure applying means taking the form of an inflatable bladder.

6. In combination with a blood bag, a blood infusion pump comprising:

a housing, said housing including a storage chamber for locating said blood bag;

pressure applying means for applying an evenly distributed force to said blood bag;

pressure supply means for supplying a pressurized fluid through a conduit assembly to said pressure applying means, whereby said pressurized fluid is conducted to said pressure applying means which causes blood to be discharged from said blood bag;

said housing including a door, said door being openable to permit access into said storage chamber, latching means mounted on said housing, said latching means for maintaining said door in the closed position;

a pressure release valve located within said conduit assembly, said pressure release valve to release fluid pressure from said pressure applying means when said access door is opened;

said pressure supply means comprising a container containing a quantity of pressurized fluid, a valve assembly connected to said conduit assembly, said valve assembly to connect with said container to thereby supply the pressurized fluid from said container into said conduit assembly;

said valve assembly being continuously spring biased into an airtight relationship with said container, said valve assembly being movable a limited amount in respect to said conduit assembly; and

said container being mounted on a container support assembly, said container support assembly being adjustable to accommodate different heights of containers.

7. The combination as defined in claim 6 wherein

said housing including a door, said door being openable to permit access into said storage chamber, latching means mounted on said housing, said latching means for maintaining said door in the closed position.

8. The combination as defined in claim 7 wherein:

a pressure release valve located within said discharge conduit assembly, said pressure release valve to release fluid pressure from said pressure applying means when said access door is opened.

9. The combination as defined in claim 8 wherein:

said pressure applying means taking the form of an inflatable bladder.