| 摘要 |
A portable, hydraulic extremity pump apparatus for treatment of edema is disclosed. The apparatus consists of a flexible compression unit (24) configured to wrap around an individual's extremity. The compression unit (24) has a plurality of annular compartments (42, 44, 46, 48, 50, 52). Each compartment contains a prefill bladder (56) and a compression bladder (58) which are connected to a hydraulic pump (28) for pressurizing the bladders. Prefill control valves (72) are inserted between the pump (28) and each prefill bladder (56) and similarly compression control valves (70) are inserted between the hydraulic pump (28) and each compression bladder (58). Pressure sensors (76) are connected to prefill bladders (56). The control valves (70, 72) and pressure sensors (76) are connected to a programmable control processor (26) to operate the valving and monitor the bladder pressures. The prefill bladders (56) are pressurized by way of operating the hydraulic pump (28) and opening the prefill valves (72) until an appropriate pressurization is achieved. The prefill valves (72) are then closed and the pump (28) shut down with the compression unit (24) molded around the extremity. The occurrence of edema is then detected by the monitoring of the pressure in the prefill bladders by way of the pressure sensors (76) and control processor (26). Upon detecting an increase in pressure, the control processor (26) activates the pump and opens the compression control valves (70) in a sequential manner beginning with the control valve connected to the most distal bladder (52) with respect to the extremity. This causes a sequential pressurization and creates a wave of compression moving proximally on the extremity.
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