Mobile extremity pumping apparatus

• US 5,891,065 A
• Filed: 07/31/1996
• Issued: 04/06/1999
• Est. Priority Date: 07/31/1996
• Status: Expired due to Term

• Current Assignee: Spinal Cord Society
• Original Assignee: Spinal Cord Society
• Inventors: Jeutter, Dean C., Liang, Shih-Kang, Cariapa, Vikram
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): KOO, BENJAMIN K
• Application Number:
  US08/690,611
• Time in Patent Office: 979 Days
• Field of Search: 601/148, 601/149, 601/150, 601/151, 601/152, 128/DIG. 20
• US Class Current: 601/152
• CPC Class Codes: A61H 2205/12 Feet
• CPC Class Codes: A61H 9/0078 with intermittent or alternately inflated bladders or cuffs mattresses for preventing bed-sores with alternated pressurized chambers A61G7/05776

Abstract

The present invention is a vehicle having a mobile extremity pumping apparatus mounted thereon. The mobile extremity pumping apparatus comprises a control module, a driver module and one or more compression units. A two-layer bladder assembly is positioned between the inner layer and the outer shell comprising precompression and compression bladder layers. The precompression bladder layer extends longitudinally along the person'"'"'s extremity with the individual bladders each wrapping around and arranged sequentially along the extremity. The precompression bladder layer is surrounded by a compression bladder layer mounted between the precompression bladder layer and the outer shell. A pump in the driver module compresses the media, which may be water, air, or similar media, and directs the compressed media to a manifold for distribution to each valve in the driver module. A control processor unit in the control module is connected to each valve in the driver module and further connected to each pressure sensor in the driver module to monitor the pressure in each bladder in the two-bladder layer assembly.

Claims

1. A mobile extremity pumping apparatus for a person having an extremity, the apparatus comprising:

a) a support structure for holding the person;

b) wheels rotatably attached to the support structure;

c) a driver portion attached to the support structure, the driver portion having a pump and a plurality of valves connected to the pump;

d) a control portion attached to the support structure, the control portion configured to control the pump and valves in the driver portion;

e) a compression unit configured to wrap around and engage the extremity, the compression unit comprising;

i) a precompression bladder layer in the compression unit proximate to the extremity, the precompression bladder layer having a plurality of bladders, such that each bladder has at least one adjacent bladder and wherein each bladder overlaps with an adjacent bladder in the precompression layer, the precompression bladder layer arranged for wrapping around and extending along the extremity, the bladders in the precompression bladder layer in communication with the pump, at least one of the plurality of valves in the driver portion connected for controlling at least one bladder in the precompression layer; and

ii) a compression bladder layer having a plurality of bladders such that each bladder has at least one adjacent bladder and wherein each bladder overlays with an adjacent bladder, the compression bladder layer also arranged for wrapping around and extending along the extremity, the compression bladder layer positioned adjacent the precompression bladder layer to extend over the precompression bladder layer when the compression unit is wrapped around an extremity, at least one other of the plurality of valves in the driver portion connected for controlling at least one bladder in the compression bladder layer;

f) a compression media pumpable by the pump for pressurizing the bladders; and

g) a power supply connected to the control portion and the driver portion.

2. The invention of claim 1 wherein each bladder in the precompression bladder layer is bonded to an adjacent bladder.

3. The invention of claim 1 further comprising a shell surrounding the compression unit.

4. The invention of claim 3 wherein the shell comprises a series of overlapping compartments, each compartment separated from an adjacent compartment by a compartment wall, the bladders of the precompression bladder layer mounted in each compartment whereby when the compression unit is wrapped around an extremity said bladders are adjacent the extremity and the overlapping compartments hold the adjacent bladders in the precompression bladder layer in an overlapping configuration.

5. The invention of claim 4 wherein each bladder forming the compression bladder layer is mounted respectively in each overlapping compartment adjacent the precompression bladder layer opposite the extremity and the shell, the shell holding the side portions of each bladder in the compression bladder layer in an overlapping configuration with respect to an adjacent bladder in the compression bladder layer.

6. The invention of claim 1 further comprising a means for sensing edema in communication with the control portion for sensing the onset of edema in the extremity and actuating the pump, said means for sensing edema being activated by an increase in pressure in one or more of the bladders in the precompression bladder layer caused by an increase in the diameter of the extremity.

7. The invention of claim 1 further comprising a quick disconnect connector on each bladder.

8. The invention in claim 1 wherein the compression media is selected from the group consisting of water and air.

9. The invention in claim 8 further comprising a reservoir on the support structure and in communication with the pump, the reservoir holding the compression media.

10. The invention of claim 1 further comprising a pressure sensor in communication with at least one bladder in the precompression bladder layer.

11. The invention of claim 1 further comprising an edema sensing portion comprising a pressure sensor in communication with a bladder in the precompression bladder layer.

12. The invention of claim 1 wherein the extremity is a leg with a foot having a heel and toes wherein the bladders in the precompression bladder layer further comprise a toe bladder mounted proximate to the toes, a mid-foot bladder mounted proximate to the foot and a plurality of leg bladders mounted proximate to the leg of the extremity.

13. The invention of claim 12 further comprising a heel bladder mounted proximate to the heel portion adjacent to the mid-foot bladder.

14. The invention of claim 1 further comprising a control processor unit in the control portion configured to control each valve connected to the precompression bladder layer to uniformly compress the leg by directing the compression media to each bladder in the precompression bladder layer.

15. The invention of claim 1, the extremity comprising a distal portion and a proximal portion, further comprising a different valve in the driver portion connected to each bladder in the compression bladder layer, a control processor unit in the control portion electrically connected to each valve in the driver portion, the control processor unit configured to sequentially compress the extremity by directing the compression media from the pump to the bladders in the compression bladder layer such that the bladders in the compression bladder layer are filled sequentially with the compression media compressing the bladders proximate to the distal portion first and next sequentially compressing adjacent bladders to form a compressive wave from the distal portion to the proximal portion.

17. The invention of claim 14 further comprising a pressure sensor in communication with at least one bladder in the compression unit, the pressure sensor connected to the control portion.

18. The invention of claim 14 further comprising a pressure sensor in communication with at least one bladder in the compression bladder layer and connected to the control portion.

19. The invention of claim 18 wherein the control portion is configured to direct the flow of the compression media into the compression unit upon the edema sensing portion sensing a predetermined level of edema.

22. The invention of claim 19 further comprising a removable inner fabric layer between the compression unit and the extremity.

27. The invention of claim 17 further comprising a control processor unit in the control portion, the control processor unit connected to the pressure sensor in communication with at least one bladder in the compression unit, the control processor unit configured to detect a change in the pressure in the connected bladder caused by an increase in the diameter of the extremity indicating the onset of edema.

16. A mobile extremity pumping apparatus for a patient having an extremity, the apparatus comprising:

a) a vehicle having a support structure and a plurality of wheels rotatably mounted on the support structure for providing mobility;

b) a driver portion having a pump and a plurality of valves, the valves in fluid communication with the pump, the driver portion on the support structure;

c) a control portion on the vehicle, the control portion connected to the valves and the pump for controlling the flow of a compression media through each valve;

d) a compression unit comprising a plurality of bladders along the extremity, the bladders in fluid communication with at least one valve in the driver portion; and

e) an edema sensing portion for detecting the onset of edema in an extremity, the edema sensing portion in communication with the extremity and the control portion;

whereby, upon detection of edema, the edema sensing portion communicates with the control portion to pressurize the bladders of the on unit.

20. The invention of claim 16 further comprising a separate valve in the driver portion for each bladder in the compression unit for controlling the flow of the compression media between the pump and the respective bladders, a control processor unit in the control portion configured to activate the valves for sequential pressurization of the bladders from a distal portion of the extremity to a proximal portion of the extremity forming a compressive wave.

21. The invention of claim 16 further comprising a removable interchangeable shell attached to the compression unit.

23. The invention of claim 16 wherein the bladders in the compression unit are arranged to form a precompression bladder layer adjacent the extremity and a compression bladder layer between the precompression bladder layer and the outer shell.

24. The invention of claim 23 further comprising an edema sensing portion in communication with the precompression bladder layer.

25. The invention of claim 23 wherein each bladder in the compression bladder layer is connected to a respective valve in the driver portion and a valve connected to at least one bladder in the precompression bladder layer.

26. The invention of claim 23 further comprising a separate pressure sensor for each bladder in the compression bladder layer, each pressure sensor inserted intermediate the pump and the respective bladder in the compression bladder layer.

28. A wheelchair mobility supporting a person having an extremity in combination with a mobile extremity pumping apparatus, the mobile extremity pumping apparatus comprising:

a) a wheelchair having a support structure and a plurality of wheels rotatably mounted on the support structure;

b) a control portion having a control processor unit, a plurality of outputs and a plurality of inputs, the control processor configured to detect signals at one of the plurality of inputs and turn one or more of the plurality of outputs on or off;

c) a driver portion comprising a pump connected to one of the plurality of outputs, a plurality of valves in fluid communication with the pump, each valve connected to a respective one of the plurality of outputs in the control portion, the control processor unit configured to control the valves;

d) a flexible compression unit for removably wrapping around the extremity, the compression unit extending from a proximal portion of the extremity to a distal portion of the extremity, the compression unit having a two-bladder layer assembly comprising;

i) a precompression bladder layer having a plurality of overlapping bladders arranged proximate to the extremity and supported in position to wrap around the extremity, the bladders arranged sequentially along the extremity from the distal portion to the proximal portion, each bladder having side portions, each side portion of each bladder overlapping with adjacent side portions of adjacent bladders, at least one valve in the driver portion connected to the bladders in the precompression bladder layer, a pressure sensor in communication with at least one bladder in the precompression bladder layer;

ii) a compression bladder layer having a plurality of bladders arranged sequentially along the precompression bladder layer from the distal portion of the extremity to the proximal portion of the extremity, each bladder in the compression bladder layer connected to a respective one of the plurality of valves in the driver portion;

d) a removable outer shell for wrapping around the compression unit;

e) an edema sensing portion for sensing edema; and

f) circuitry in the control processor unit in communication with the edema sensing portion and configured to sequentially compress the bladders in the compression bladder layer.