| 摘要 |
An apparatus (10) for the patient-controlled delivery of a beneficial agent comprising a dose reservoir (30) for receiving and storing a beneficial agent, inlet means (40) to and outlet means from the dose reservoir (30) and pump means (23) operative in response to an external force supplied to the pump means (23) for drawing beneficial agent into the dose reservoir (30) at a relatively constant rate and for discharging the beneficial agent out of the dose reservoir (30) through th outlet means.
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