Personally portable vacuum desiccator

• US 6,648,862 B2
• Filed: 11/20/2001
• Issued: 11/18/2003
• Est. Priority Date: 11/20/2001
• Status: Expired

• Current Assignee: KCI Licensing Incorporated (3M Company)
• Original Assignee: Spheric Products, Ltd.
• Inventors: Watson, Richard
• Primary Examiner(s): Lo, Weilun
• Assistant Examiner(s): BOGART, MICHAEL G
• Application Number:
  US09/996,970
• Publication Number:
  US 20030097100A1
• Time in Patent Office: 728 Days
• Field of Search: 604/317-328, 604/313
• US Class Current: 604/319
• CPC Class Codes: A61M 1/60 Containers for suction drainage, adapted to be used with an external suction source containers not adapted for subjection to vacuum A61M1/69
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 2205/8206 battery-operated

Abstract

The vacuum desiccator low pressure vacuum pump and trap and is transportable upon a user'"'"'s person. The device is especially useful to remove excess fluids from wounds and incisions as they heal. The device includes a desiccator cartridge containing a fluid trapping agent. The desiccator cartridge is connected to a vacuum pump member providing a low vacuum pressure to the interior chamber of the desiccator cartridge. A small battery powered, electric motor drives the pump member. An electrical control circuit, including the battery power source, controls the operation of the electric motor. A single passage, one-way, gas/liquid flow pathway connects the inlet port of the desiccator cartridge to an occlusive dressing covering the wound to be drained. The control circuit includes one or more ancillary circuits for controlling operation of the device, such as: a power circuit, a moisture sensor, a timer circuit, a vacuum pressure sensor, and a pressure differential sensor.

Claims

1. A personally portable vacuum desiccator comprising:

a moisture trap, the trap further comprising a desiccator cartridge having an interior chamber containing a trapping agent, and an inlet port and an outlet port in gas/liquid communication with the interior chamber;

a vacuum pump member having a low pressure port and an exhaust port, the low pressure port in gas/liquid flow communication with the outlet port of the desiccator cartridge and with the exhaust port vented to atmosphere, and the vacuum pump member being operable to provide a low vacuum pressure to the interior chamber;

an electric motive means in communication with the vacuum pump member and operative to drive the vacuum pump member; and

an electrical control circuit, including an electrical power source, the control circuit in electrical communication with and operative to control operation of the electric motive means;

wherein said personally portable vacuum desiccator is generally flat and may be worn unobtrusively by a user and is adaptable for collecting and trapping liquid from a wound or incision on the user in said moisture trap.

2. The personally portable vacuum desiccator of claim 1, further comprising a single passage gas/liquid flow path delivery tube, having an input end and an output end, the output end being connected to the inlet port of the desiccator cartridge.

3. The personally portable vacuum desiccator of claim 1, further comprising a housing containing the electric motive means and the electrical control circuit.

4. The personally portable vacuum desiccator of claim 1, further comprising a housing containing the electric motive means and the electrical control circuit and at least one additional element selected from the group consisting of the desiccator cartridge and the vacuum pump member.

5. The personally portable vacuum desiccator of claim 1, wherein the vacuum pump member is integral with the desiccator cartridge.

6. The personally portable vacuum desiccator of claim 1, wherein the electric motive means includes an electric motor mechanically coupled to the vacuum pump member.

7. The personally portable vacuum desiccator of claim 1, wherein the electric motive means includes an electric motor magnetically coupled to the vacuum pump member.

8. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes an electrical power source comprising a battery.

9. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes an electrical power source comprising a battery, and the battery is removable from the electrical control circuit and replaceable.

10. The personally portable vacuum desiccator of claim 1, further comprising a one-way valve disposed proximate the inlet port of the desiccator cartridge, the one-way valve preventing gas/liquid and particulate flow out of the inlet port.

11. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes a moisture sensor for detecting the presence of moisture proximate the low pressure port of the vacuum pump member.

12. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes a timer circuit for intermittently operating the electric motive means.

13. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes a vacuum pressure sensor for detecting a vacuum pressure in the interior chamber of the desiccator cartridge.

14. The personally portable vacuum desiccator of claim 1, wherein the electrical control circuit includes a pressure differential sensor for sensing a difference in pressure between the inlet and outlet ports of the desiccator cartridge.

15. The personally portable vacuum desiccator of claim 1, wherein the desiccator cartridge is removable from the vacuum desiccator and replaceable.

16. The personally portable vacuum desiccator of claim 1, wherein components in gas/liquid flow communication are replaceable.

17. The personally portable vacuum desiccator of claim 1, wherein the desiccator cartridge contains a trapping agent selected from the group consisting of:

a desiccant, an adsorbent and an absorbent.

18. The personally portable vacuum desiccator of claim 1, further comprising a micro-filter positioned after the outlet port of the desiccator cartridge and before the exhaust port of the vacuum pump member, the micro-filter blocking the passage of bacteria.

19. The personally portable vacuum desiccator of claim 1, wherein the power source is integrally combined with the desiccator cartridge, and the combined desiccator-power source being installable in and removable from the vacuum desiccator as a single unit.

20. A personally portable vacuum desiccator comprising:

a desiccator cartridge, the cartridge being removable from the vacuum desiccator and replaceable, and having an interior chamber containing a trapping agent, the trapping agent being a moisture tapping pillow, and an inlet port and an outlet port in gas/liquid communication with the interior chamber, and a one-way valve disposed proximate the inlet port for preventing gas/liquid and particulate flow out of the inlet port;

a single passage gas/liquid flow pathway having an input end and an output end, the output end being connected to the inlet port of the desiccator cartridge;

a vacuum pump member having a low pressure port and an exhaust port, the low pressure port in gas/liquid flow communication with the outlet port of the desiccator cartridge and with the exhaust port vented to atmosphere, and the vacuum pump member being operable to provide a low vacuum pressure to the interior chamber;

an electric motive means in communication with the vacuum pump member and operative to drive the vacuum pump member, the electric motive means including an electric motor coupled to the vacuum pump member; and

an electrical control circuit, including an electrical power source, the control circuit in electrical communication with and operative to control operation of the electric motive means, the electrical power source comprising a battery, with the battery being removable from the electrical control circuit and replaceable, and wherein the electrical control circuit includes one or more ancillary circuits selected from the group consisting of;

a power circuit for turning the electrical control circuit on and off, a moisture sensor for detecting the presence of moisture proximate the low pressure port of the vacuum pump member, a timer circuit for intermittently operating the electric motive means, a vacuum pressure sensor for detecting a vacuum pressure in the interior chamber of the desiccator cartridge, a pressure differential sensor for sensing a difference in pressure between the inlet and outlet ports of the desiccator cartridge.

21. A personally portable vacuum desiccator for draining and collecting excess fluid from a wound ox incision on a user, said vacuum desiccator comprising;

a thin moisture trap having a fluid trapping agent, an inlet port, and an outlet port;

a delivery tube having a first end positionable in gas/liquid flow communication with the wound or incision on the user and a second end in gas/liquid flow communication with said inlet port;

a vacuum pump in gas/liquid flow communication with said outlet port;

an electric motor operably connected to said vacuum pump; and

a control circuit in electrical communication with said motor, said control circuit having an electric power source and being operable for controlling the operation of said motor;

said vacuum desiccator being transportable upon the user'"'"'s person

said vacuum pump being operable to draw fluid from the wound or incision through said delivery tube and into said moisture trap;

said fluid trapping agent having a capacity for trapping a volume of the fluid.

22. The personally portable vacuum desiccator of claim 21 wherein said delivery tube comprises a single passage gas/liquid flow path.

23. The personally portable vacuum desiccator of claim 21 wherein:

said moisture trap comprises a desiccator cartridge having an interior chamber;

said interior chamber having a gas flow channel and said fluid trapping agent disposed therein;

said gas flow channel being connected to said outlet port.

24. The personally portable vacuum desiccator of claim 23 wherein said gas flow channel comprises a second tube having perforations therein.

25. The personally portable vacuum desiccator of claim 24 wherein said second rube is arranged in a configuration selected from the group consisting of coiled and snaked.

26. The personally portable vacuum desiccator of claim 23 wherein said desiccator cartridge comprises a cover member and a body member, said gas flow channel being integrated into said cover member.

27. The personally portable vacuum desiccator of claim 21 further comprising a one-way valve proximate said inlet port to prevent gas/liquid flow out of said moisture trap through said inlet port.

28. The personally portable vacuum desiccator of claim 21 further comprising a micro-filter proximate said outlet port to prevent bacteria or moisture from leaving said moisture tap through said outlet port.

29. The personally portable vacuum desiccator of claim 21 further comprising a moisture sensor proximate said outlet port and in communication wit said control for controlling said motor in response to the detection of moisture proximate circuit said outlet port.

30. The personally portable vacuum desiccator of claim 21 further comprising a vacuum pressure sensor for detecting the vacuum pressure within said moisture trap, said vacuum pressure sensor being in communication with said control circuit for controlling said motor in response to said vacuum pressure.

31. The personally portable vacuum desiccator of claim 21 further comprising a pressure differential sensor for detecting the pressure differential between said inlet port and said outlet port, said pressure differential sensor being in communication with said control circuit for controlling said motor in response to said pressure differential.

32. The personally portable vacuum desiccator of claim 21 wherein said volume is about 50 cc.

33. The personally portable vacuum desiccator of claim 21 wherein said fluid tapping agent is selected from the group consisting of desiccants, adsorbent;

and absorbents.

34. The personally portable vacuum desiccator of claim 21 wherein said moisture trap has a generally rectangular shape.