Injection system, pump system for use therein and method of use of pumping system

• US 6,197,000 B1
• Filed: 04/13/1999
• Issued: 03/06/2001
• Est. Priority Date: 02/14/1997
• Status: Expired due to Term

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M., Hirschman, Alan D.
• Primary Examiner(s): NGUYEN, ANH TUAN TUONG
• Application Number:
  US09/290,451
• Time in Patent Office: 693 Days
• Field of Search: 604/151, 604/152, 604/153, 604/154, 604/191, 604/131, 604/135, 604/33, 604/31, 604/32
• US Class Current: 604/152
• CPC Class Codes: A61M 2206/22 eliminating pulsatile flows, e.g. by the provision of a dampening chamber
• 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

Abstract

The present invention provides an injection system and a pump system for use therein for pressurizing a liquid medium for injection into a patient. In general, the pump system comprises a pressurizing unit having at least one chamber. Each chamber has disposed therein a pressurizing mechanism to pressurize liquid medium within the chamber. Preferably, the pressurizing mechanism positively displaces the liquid medium through generally linear motion of the pressurizing mechanism within the chamber. Through reciprocating linear motion of the pressurizing mechanism (for example, a piston), the liquid medium is alternatively drawn into the chamber from a source of liquid medium (for example, a container) and forced out of the chamber under a desired pressure. Each chamber comprises an inlet port and an outlet port. The pump system also preferably comprises an inlet port check valve which allows the liquid medium to flow into the chamber through the inlet port, but substantially prevents the liquid medium from flowing out of the chamber through the inlet port. Likewise, the pump system preferably comprises an outlet port check valve which allows pressurized liquid medium to flow out of the chamber through the outlet port, but substantially prevents the liquid medium from flowing into the chamber through the outlet port. Each inlet port is connected to a source of liquid medium. Each outlet port is connected to a common outlet line or channel leading to the patient.

Claims

1. A pump system for pressurizing a liquid medium for injection into a patient, the pump system comprising:

at least two chambers, each chamber having disposed therein a pressurizing mechanism comprising an extending member to pressurize the liquid medium within the chamber; and

a drive mechanism in operative connection with the extending members of the pressurizing mechanisms, the drive mechanism comprising timing means for driving the extending members of each pressurizing mechanism in a timed fashion, each chamber in fluid communication with a separate inlet port and a separate outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to an outlet line for transmitting pressurized liquid medium to the patient, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient.

2. The pump system of claim 1 wherein the drive mechanism is readily removable from connection with the pressurizing mechanism of each chamber.

3. The pump system of claim 1 wherein the chambers are in generally linear, side-by-side alignment.

4. The pump system of claim 1 wherein the pump system comprises at least three chambers.

5. The pump system of claim 1 wherein the pressurizing mechanism further comprises a piston, and further wherein the extending member comprises a connector on a distal end thereof to releasably connect the extending member to the drive mechanism.

6. The pump system of claim 1 wherein the inlet port of each chamber is connected to a common source of liquid medium.

7. The pump system of claim 1 wherein the inlet port of one chamber is connected to a first liquid medium container containing a first liquid medium and the inlet port of at least one other chamber is connected to a second liquid medium container containing a second liquid medium.

8. The pump system of claim 1 further comprising a dampening chamber in fluid connection with the common outlet line.

9. A pump system for pressurizing a liquid medium for injection into a patient, the pump system comprising:

at least two chambers, each chamber having disposed therein a pressurizing mechanism comprising an extending member to pressurize the liquid medium within the chamber; and

a drive mechanism in operative connection with the extending members of the pressurizing mechanisms, the drive mechanism comprising timing means for driving the extending members of each pressurizing mechanism in a timed fashion to control the pulsatile nature of the flow in an outlet line, each chamber in fluid communication with a separate inlet port and a separate outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to an outlet line for transmitting pressurized liquid medium to the patient, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient.

10. The pump system of claim 9 wherein the drive mechanism is readily removable from connection with the pressurizing mechanism of each chamber.

11. The pump system of claim 9 wherein the pressurizing mechanism further comprises a piston, and further wherein the extending member comprises a connector on a distal end thereof to releasably connect the extending member to the drive mechanism.

12. The pump system of claim 9 wherein the inlet port of each chamber is connected to a common source of liquid medium.

13. The pump system of claim 9 wherein the inlet port of one chamber is connected to a first liquid medium container containing a first liquid medium and the inlet port of at least one other chamber is connected to a second liquid medium container containing a second liquid medium.

14. An injection system for injecting a liquid medium into a patient, the injection system comprising:

a pump system in fluid connection with the at least one liquid medium container, the pump system comprising at least two chambers, each chamber having disposed therein a pressurizing mechanism comprising an extending member to pressurize the liquid medium within the chamber, and a drive mechanism in operative connection with the extending members of the pressurizing mechanisms, the drive mechanism comprising timing means for driving the extending members of the pressurizing mechanisms in a timed fashion, each chamber further comprising a separate inlet port and a separate outlet port, each inlet port being connected to the at least one liquid medium container, each outlet port being connected to an outlet line for transmitting pressurized liquid medium to the patient, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient; and

a disposable patient interface in contact with the patient for injection of pressurized liquid medium into the patient, the disposable patient interface being in fluid connection with the outlet line.

15. The injection system of claim 14 wherein the drive mechanism is readily removable from connection with the pressurizing mechanism of each chamber.

16. The injection system of claim 14 wherein the chambers are in generally linear, side-by-side alignment.

17. The injection system of claim 14 wherein the pump system comprises at least three chambers.

18. The injection system of claim 14 wherein the pressurizing mechanism further comprises a piston, and further wherein the extending member comprises a connector on a distal end thereof to releasably connect the extending member to the drive mechanism.

19. The injection system of claim 14 wherein the inlet port of each chamber is connected to one liquid medium container.

20. The injection system of claim 14 wherein the inlet port of one chamber is connected to a first liquid medium container containing a first liquid medium and the inlet port of at least one other chamber is connected to a second liquid medium container containing a second liquid medium.

21. The injection system of claim 14 further comprising a dampening chamber in fluid connection with the common outlet line.

22. A disposable pump for use with a pumping system comprising a powered drive mechanism having timing means to inject a liquid medium into a patient, the disposable pump comprising at least two chambers, each of the chambers having disposed therein a pressurizing mechanism to pressurize the liquid medium, the pressurizing mechanism of each chamber comprising an extending member having a connector to releasably connect the pressurizing mechanism of each chamber to the timing means of the powered drive mechanism, the timing means driving the extending members of the pressurizing mechanisms in a timed fashion, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient.

23. The disposable pump of claim 22 wherein the at least two chambers comprises at least three chambers.

24. The disposable pump of claim 22 wherein each chamber further comprises an inlet port and an outlet port, the inlet port of each chamber being in fluid connection with an inlet port check value adapted to allow the liquid medium to flow into the chamber through the inlet port and to substantially prevent the liquid medium from flowing out of the chamber through the inlet port, the outlet port of each chamber being in fluid connection with an outlet port check valve adapted to allow pressurized liquid medium to flow out of the chamber through the outlet port and to substantially prevent the liquid medium from flowing into the chamber through the outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to a common outlet line for transmitting pressurized liquid medium to the patient.

25. The disposable pump of claim 22, further comprising a head unit comprising a common channel in fluid connection with the common outlet line and a common inlet line in fluid connection with the liquid medium source and with each inlet port.

26. The disposable pump of claim 22, further comprising a head unit comprising a common outlet channel in fluid connection with the common outlet line and a first inlet channel, the first inlet channel being connected to a first liquid medium container containing a first liquid medium, the inlet port of one chamber being in fluid connection with the first inlet channel to receive the first liquid medium from the first liquid medium container, the head unit further comprising a second inlet channel, the second inlet channel being in fluid connection with a second liquid medium container containing a second liquid medium, the inlet port of another chamber being in fluid connection with the second inlet channel to receive the second liquid medium from the second liquid medium source.

27. A method of using a pump system comprising a powered drive mechanism for injecting a liquid medium into a patient, the method comprising the following steps:

providing a disposable pump unit comprising at least two chambers each chamber having disposed therein a pressurizing mechanism to pressurize the liquid medium via generally linear motion of the pressurizing mechanism, the pressurizing mechanism of each chamber comprising a connector to releasably connect the pressurizing mechanism of each chamber to the powered drive mechanism, each chamber further comprising a separate inlet port and a separate outlet port, the inlet port of each chamber being in fluid communication with an inlet port check valve adapted to allow the liquid medium to flow into the chamber through the inlet port and to substantially prevent the liquid medium from flowing out of the chamber through the inlet port, the outlet port of each chamber being in fluid communication with an outlet port check valve adapted to allow pressurized liquid medium to flow out of the chamber through the outlet port and to substantially prevent the liquid medium from flowing into the chamber through the outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to a common outlet line for transmitting pressurized liquid medium to the patient;

releasably connecting the disposable pump unit to the drive mechanism; and

driving the pressurizing mechanism of each chamber via the drive mechanism in a timed fashion such that the flow rate and pressure of the liquid medium in the outlet line remain substantially constant.

28. The method of claim 27, further comprising the steps of:

providing a patient interface having a first end and a second end;

connecting the first end of the patient interface to the outlet line; and

connecting the second end of the patient interface to the patient.

29. A method of using a pump system comprising a powered drive mechanism for injecting a liquid medium into a patient, the method comprising the following steps:

providing a disposable pump unit comprising at least three chambers, each of the chamber having disposed therein a pressurizing mechanism to pressurize the liquid medium via generally linear motion of the pressurizing mechanism, the pressurizing mechanism of each chamber comprising a connector to releasably connect the pressurizing mechanism of each chamber to the powered drive mechanism, each chamber further comprising a separate inlet port and a separate outlet port, the inlet port of each chamber being in fluid communication with an inlet port check valve adapted to allow the liquid medium to flow into the chamber through the inlet port and to substantially prevent the liquid medium from flowing out of the chamber through the inlet port, the outlet port of each chamber being in fluid communication with an outlet port check valve adapted to allow pressurized liquid medium to flow out of the chamber through the outlet port and to substantially prevent the liquid medium from flowing into the chamber through the outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to a common outlet line for transmitting pressurized liquid medium to the patient;

releasably connecting the disposable pump unit to the drive mechanism; and

reciprocally driving the pressurizing mechanism of each chamber via the drive mechanism in a timed fashion.

30. The method of claim 29, further comprising the steps of:

providing a patient interface having a first end and a second end;

connecting the first end of the patient interface to the outlet line; and

connecting the second end of the patient interface to the patient.

31. A pump for cooperating with a powered drive mechanism having timing means to inject a liquid medium into a patient, the pump comprising at least two chambers, each of the chambers having disposed therein a pressurizing mechanism to pressurize the liquid medium, the pressurizing mechanism of each chamber comprising an extending member having a connector to releasably connect the pressurizing mechanism of each chamber to the timing means of the powered drive mechanism, the timing means driving the extending members of the pressurizing mechanisms in a timed fashion, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient.

32. A pump system for cooperating with a powered drive mechanism to inject a liquid medium into a patient, the pump system comprising a disposable pump unit, the disposable pump unit comprising at least two chambers, each of the chambers having disposed therein a pressurizing mechanism to pressurize the liquid medium via reciprocal motion of the pressurizing mechanism, the pressurizing mechanism of each chamber comprising an extending member having a connector to releasably connect the pressurizing mechanism of each chamber to timing means of the powered drive mechanism, the timing means driving the extending members of the pressurizing mechanisms in a timed fashion to reduce the pulsatile nature of the flow in a separate outlet line of the pump unit.

33. A pump system for use in pressurizing a liquid medium for injection into a patient, the pump system comprising:

at least three chambers, each chamber having disposed therein a pressurizing mechanism comprising an extending member to pressurize the liquid medium, the pressurizing mechanism pressurizing the liquid medium via generally linear motion of the pressurizing mechanism within the chamber; and

a drive mechanism in operative connection with the extending members of the pressurizing mechanisms, the drive mechanism comprising timing means for driving the extending members of the pressurizing mechanisms in a timed fashion, each chamber further comprising a separate inlet port and a separate outlet port, each inlet port being in fluid connection with an inlet port valve adapted to allow the liquid medium to flow into the chamber through the inlet port and to substantially prevent the liquid medium from flowing out of the chamber through the inlet port, each outlet port being in fluid connection with an outlet port check valve adapted to allow pressurized liquid medium to flow out of the chamber through the outlet port and to substantially prevent the liquid medium from flowing into the chamber through the outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to a common outlet line for transmitting pressurized liquid medium to the patient.

34. An injection system for use in injecting a liquid medium into a patient, the injection system comprising:

a pump system in fluid connection with the at least one liquid medium container, the pump system comprising at least three chambers, each chamber having disposed therein a pressurizing mechanism comprising an extending member to pressurize the liquid medium, the pressurizing mechanism pressurizing the liquid medium via generally linear motion of the pressurizing mechanism within the chamber, and a drive mechanism in operative connection with the extending members of the pressurizing mechanisms, the drive mechanism comprising timing means for driving the extending members of the pressurizing mechanisms in a timed fashion, each chamber further comprising a separate inlet port and a separate outlet port, the inlet port of each chamber being in fluid connection with an inlet check valve adapted to allow the liquid medium to flow into the chamber through the inlet port and to substantially prevent the liquid medium from flowing out of the chamber through the inlet port, the outlet port of each chamber being in fluid connection with an outlet port check valve adapted to allow pressurized liquid medium to flow out of the chamber through the outlet port and to substantially prevent the liquid medium from flowing into the chamber through the outlet port, each inlet port being connected to the at least one liquid medium container, each outlet port being connected to a common outlet line for transmitting pressurized liquid medium to the patient; and

a disposable patient interface in contact with the patient for injection of pressurized liquid medium into the patient, the disposable patient interface being in fluid connection with the common outlet line.

35. A method of injecting a liquid medium into a patient, comprising the following steps:

providing a drive mechanism comprising timing means;

providing a pump unit comprising at least two chambers, each of the chambers having disposed therein a pressurizing mechanism to pressurize the liquid medium, the pressurizing mechanism of each chamber comprising an extending member having a connector to connect the pressurizing mechanism of each chamber to the timing means of the drive mechanism, each chamber in fluid communication with a separate inlet port and a separate outlet port, each inlet port being connected to a liquid medium source, each outlet port being connected to an outlet line for transmitting pressurized liquid medium to the patient;

connecting the pump unit to the drive mechanism; and

driving the extending members of the pressurizing mechanisms of each chamber via the timing means of the drive mechanism in a timed fashion, wherein each pressurizing member is reciprocally driven by the drive mechanism to inject the liquid medium into the patient.

36. The method of claim 35 wherein the pump unit comprises three or more chambers.

37. The method of claim 35 wherein said connecting step comprises releasably connecting the pump unit to the drive mechanism.

38. The method of claim 35, further comprising the steps of:

providing a patient interface having a first end and a second end;

connecting the first end of the patient interface to the outlet line; and

connecting the second end of the patient interface to the patient.