Reusable medical cassette for ambulatory medical infusion pumps

• US 5,397,222 A
• Filed: 11/01/1993
• Issued: 03/14/1995
• Est. Priority Date: 11/01/1993
• Status: Expired due to Fees

• Current Assignee: Fredrick Kamienny
• Original Assignee: Fredrick Kamienny
• Inventors: Moss, Richard, Erlich, Frederick L.
• Primary Examiner(s): Bertsch, Richard A.
• Assistant Examiner(s): KORYTNYK, PETER G
• Application Number:
  US08/145,866
• Time in Patent Office: 498 Days
• Field of Search: 417/474-477, 417/360, 604/153, 604/154
• US Class Current: 417/477.2
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 5/1413 Modular systems comprising interconnecting elements
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps

Abstract

A reusable cassette assembly (14) for an ambulatory medical infusion pump (10) with a reservoir bag (22) has a pump plate 16 removably attached to the shell (18). The pump plate includes a retainer (30) and latch (50) that have distal ends (44) and (56) spaced from the upper surface (26) of the pump plate to allow the tube (22) of the reservoir bag (22) to be laterally engaged or disengaged thereunder. The plate has a slot (25) that is opened or closed by a removable wall section (63) of the shell (18) to allow the tube to laterally disengage from the slot (25).

Claims

1. A reusable cassette casing for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate member that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing that presses said tube against said plate member, said cassette casing characterized by:

said plate member being removably secured to a cassette shell via a plurality of connection devices;

an open end of said cassette shell being sized and shaped to provide removal of a reservoir bag from an interior of said shell and insertion and installation of a second reservoir bag within said interior of said shell;

said connection devices cooperating with said shell and plate member to removably mount said plate member to said shell at said open end of said shell and be usable to reconnect said plate member to said shell member; and

said connection devices being moveable between a first and second position such that when in the second position, the plate member is free to be removable from said shell and when in a first position said connection device securely affix said plate member onto said shell.

2. A reusable cassette casing for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate member that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing that presses said tube against said plate member, said cassette casing characterized by:

said plate member being removably secured to a cassette shell via a plurality of connection devices;

an open end of said cassette shell being sized and shaped to provide removal of a reservoir bag from an interior of said shell and insertion and installation of a second reservoir bag within said interior of said shell;

said connection devices cooperating with said shell and plate member to removably mount said plate member to said shell at said open end of said shell and be usable to reconnect said plate member to said shell member;

said connection devices including a plurality of resilient prongs connected to a one of said plate member about its periphery and said shell about said top open end; and

said connection devices including a plurality of notches sized to receive said resilient prongs in the other of said plate member about its periphery and said shell about said top open end; and

said connection devices constructed for automatically locking said plate in a closed position when positioned into said closed position over open end of said shell, said connection devices being constructed to be openable to allow said plate member to move to an open position with respect to said top open end of said shell.

3. A reusable cassette casing for a medic infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate member that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing that presses said tube against said plate member, said cassette casing characterized by:

said plate member being removably secured to a cassette shell via a plurality of connection devices;

an open end of said cassette shell being sized and shaped to provide removal of a reservoir bag from an interior of said shell and insertion and installation of a second reservoir bag within said interior of said shell;

said connection devices cooperating with said shell and plate member to removably mount said plate member to said shell at said open end of said shell and be usable to reconnect said plate member to said shell member;

said connection devices including a slide channel at said top open end of said shell, said plate having a peripheral edge section slidably receivable in said slide channel of said shell to be slidable between an open position and a closed position; and

a latch device for automatically locking said plate in said closed position when slid into said closed position, said latch device being openable to allow said plate member to slide to the open position.

4. A reusable cassette casing for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate member that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing that presses said tube against said plate member, said cassette casing characterized by:

said plate member being removably secured to a cassette shell via a plurality of connection devices;

an open end of said cassette shell being sized and shaped to provide removal of a reservoir bag from an interior of said shell and insertion and installation of a second reservoir bag within said interior of said shell;

said connection devices cooperating with said shell and plate member to removably mount said plate member to said shell at said open end of said shell and be usable to reconnect said plate member to said shell member; and

said mounting system for mounting said plate member to a pump assembly including a hook-like protrusion that is sized to be engageable to a latch mechanism on said pump assembly;

said hook-like protrusion having a distal end space from a main plate section of said plate member to provide for lateral engagement of a tube member under said hook like protrusion and lateral disengagement of said tube member out from under said hook like protrusion; and

said plate member including a slot extending from a peripheral edge of said plate member and under said hook-like protrusion for allowing said tube member to laterally be received in said slot and laterally disengaged from said slot when said plate member is disconnected from said cassette shell member.

5. A cassette casing as defined in claim 4 further characterized by:

said plate member including a tube positioning hook having a distal end spaced from said main plate section of said plate member a distance less than the diameter of said tube to allow said tube to be laterally engaged and retained under said tube positioning hook; and

said tube being squeezable to laterally engage and disengage from said tube positioning hook.

6. A cassette casing as defined in claim 4 further characterized by:

said connection devices including a plurality of resilient prongs connected to a one of said plate member about its periphery and said shell about said top open end; and

said connection devices including a plurality of notches sized to receive said resilient prongs in the other of said plate member about its periphery and said shell about said top open end; and

said connection devices constructed for automatically locking said plate in a closed position when positioned into said closed position over open end of said shell, said connection devices being constructed to be openable to allow said plate member to move to an open position with respect to said top open end of said shell.

7. A reusable cassette casing for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate section that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing against said plate section, said cassette casing characterized by:

said plate section Being integrally formed with a first shell section member;

said first cassette shell section member being removably connected to a second cassette shell section member via a connector mechanism to define an interior of said cassette casing and movable between an open position to open said casing to provide removal of said reservoir bag from said interior and insertion and installation of a second reservoir bag within said interior of said casing and closed position after said second bag is installed.

8. A cassette casing as defined in claim 7 further characterized by:

said mounting system for joining said plate member to a pump assembly including a hook-like protrusion that is sized to be engageable to a latch mechanism on said pump assembly;

said hook-like protrusion having a distal end space from a main plate section of said plate member to provide for lateral engagement of a tube member under said hook like protrusion and lateral disengagement of said tube member out from under said hook like protrusion; and

said plate member including a slot extending from a peripheral edge of said plate member and under said hook-like protrusion for allowing said tube member to laterally be received in said slot and laterally disengaged from said slot when said plate member is disconnected from said cassette shell member.

9. A cassette casing as defined in claim 8 further characterized by:

said plate member including a tube positioning hook having a distal end spaced from said main plate section of said plate member a distance less than the diameter of said tube to allow said tube to be laterally engaged and retained under said tube positioning hook; and

said tube being squeezable to laterally engage and disengage from said tube positioning hook.

10. A reusable pumping plate member for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said plate member is adjacent a squeezable tube member that transports fluid from a reservoir bag that is squeezable by a pump in said pump housing by pressing said tube against said plate member, said plate member characterized by:

said mounting system for joining said plate member to a pump assembly including a hook-like protrusion extending from said plate member and is sized to be engageable to a latch mechanism on said pump assembly;

said hook-like protrusion having a distal end space from a main plate section of said plate member to provide for lateral engagement of said tube member under said hook like protrusion and lateral disengagement of said tube member out from under said hook like protrusion; and

said plate member including a slot extending from a peripheral edge of said plate member and under said hook-like protrusion for allowing said tube member to laterally be received in said slot and laterally disengageable from said slot when said plate member is disconnected from said cassette shell member.

11. A plate member as defined in claim 10 further characterized by:

said plate member including a tube positioning hook having a distal end spaced from a main plate section of said plate member a distance less than the diameter of said tube member to allow said tube member to be laterally engaged and retained under said tube positioning hook; and

said tube member being squeezable to laterally engage and disengage from said tube positioning hook.

12. A reusable cassette casing for a medical infusion pump system that is removably attachable to a pump housing via a mounting system, said cassette casing including a plate member that is adjacent a squeezable tube of a reservoir bag that is squeezable by a pump in said pump housing that presses said tube against said plate member, said cassette casing characterized by:

said plate member being removably secured to a cassette shell via a connection device;

an open end of said cassette-shell being sized and shaped to provide removal of a reservoir bag from an interior of said shell and insertion and installation of a second reservoir bag within said interior of said shell;

said connection device cooperating with said shell and plate member to removably mount said plate member to said shell at said open end of said shell and be usable to reconnect said plate member to said shell member; and

said connection device being moveable between a first and second position such that when in the second position, the plate member is free to be removable from said shell and when in a first position securely affixes said plate member onto said shell.