Apparatus for facilitating circulation

1. A circulation facilitating apparatus comprising:

a pneumatic assembly comprising,

a pump assembly;

a control assembly for controlling the pump assembly, the control assembly including microprocessor means and means for programming the microprocessor means;

an air controller assembly coupled to the pump assembly; and

means for energizing the pump assembly, the control assembly and the air controller assembly;

a first and a second leg assembly, each leg assembly comprising:

a housing for attaching the respective leg assembly to a respective leg of a patient;

a bladder assembly having a first chamber, a second chamber and a third chamber; and

an air passage assembly having,

a first passageway having a first component and a second component,

a second passageway having a first check valve,

a third passageway having a second check valve, the second check valve having a lower opening pressure than the first check valve,

a return passageway,

a differential piston having a first inlet, a second inlet, an outlet and a piston member, the piston member positionable in a first position wherein fluid communication is established between the first inlet and the outlet and in a second position wherein fluid communication between the first inlet and the outlet is substantially precluded, and

a return vent passageway assembly,

wherein the first component of the first passageway extends from the pump assembly to the first inlet of the differential piston, the second component of the first passageway extends from the outlet of the differential piston to the first chamber, the second passageway extends between the first chamber and the second chamber, the third passageway extends between the second chamber and the third chamber, the return passageway is positioned between the third chamber and the second inlet of the differential piston, and wherein the return vent passageway assembly includes a vent passageway extending between each chamber and the first component of the first passageway, each vent passageway including a check valve which opens when the pressure in a respective chamber exceeds the pressure in the first component in the first passageway.

2. The circulation facilitating apparatus of claim 1 wherein the air controller assembly comprises a single two position solenoid coupled to each of the first and second leg assemblies.

3. The circulation facilitating apparatus of claim 1 wherein the programming means programs at least one of a cycle time, a pressure and a hold time.

4. The circulation facilitating apparatus of claim 1 wherein the control assembly further comprises a display which comprises one of an LED, a LCD and an OLED display.

5. The circulation facilitating apparatus of claim 1 wherein the control assembly further comprises means for storing data pertaining to at least one on a program for the microprocessor means and data pertaining to an administered treatment.

6. The circulation facilitating apparatus of claim 1 wherein the programming means comprises a plurality of at least one of buttons, switches and a touch screen.

7. The circulation facilitating apparatus of claim 1 wherein the energizing means comprises a plurality of secondary cells.

8. The circulation facilitating apparatus of claim 1 wherein the housing comprises a material encircling a leg of a patient having a plurality of hook and loop fasteners retaining the position.

9. A method of facilitating circulation comprising the steps of:

providing a circulation facilitating apparatus comprising:

a pneumatic assembly comprising,

a pump assembly;

a control assembly for controlling the pump assembly, the control assembly including microprocessor means and means for programming the microprocessor means;

an air controller assembly coupled to the pump assembly; and

means for energizing the pump assembly, the control assembly and the air controller assembly;

a first and a second leg assembly, each leg assembly comprising:

a housing for attaching the respective leg assembly to a respective leg of a patient;

a bladder assembly having a first chamber, a second chamber and a third chamber; and

an air passage assembly having,

a first passageway having a first component and a second component,

a second passageway having a first check valve,

a third passageway having a second check valve, the second check valve having a lower opening pressure than the first check valve,

a return passageway,

a differential piston having a first inlet, a second inlet, an outlet and a piston member, the piston member positionable in a first position wherein fluid communication is established between the first inlet and the outlet and in a second position wherein fluid communication between the first inlet and the outlet is substantially precluded, and

a return vent passageway assembly,

wherein the first component of the first passageway extends from the pump assembly to the first inlet of the differential piston, the second component of the first passageway extends from the outlet of the differential piston to the first chamber, the second passageway extends between the first chamber and the second chamber, the third passageway extends between the second chamber and the third chamber, the return passageway is positioned between the third chamber and the second inlet of the differential piston, and wherein the return vent passageway assembly includes a vent passageway extending between each chamber and the first component of the first passageway, each vent passageway including a check valve which opens when the pressure in a respective chamber exceeds the pressure in the first component in the first passageway;

positioning the first leg assembly around a patient;

positioning the second leg assembly around a patient;

coupling the first and second leg assembly to the pneumatic assembly;

programming the pneumatic assembly for at least cycle time and hold time;

administering a programmed treatment to each of the first leg and the second leg.