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A wearable infusion device delivers a liquid medicant, such as insulin, to a patient. The infusion device comprises a base that contacts a patient's skin and a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin. The reservoir has an outlet through which the medi

A wearable infusion device delivers a liquid medicant, such as insulin, to a patient. The infusion device comprises a base that contacts a patient's skin and a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin. The reservoir has an outlet through which the medicant flows. The infusion device further includes a flexible conduit communicating with the outlet of the reservoir and a pump that causes the medicant to flow down the conduit.

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What is claimed: 1. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the ou

What is claimed: 1. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the outlet of the reservoir, the conduit being configured to be compressed by at least one pressure member; and a pump comprising at least one pressure member that applies pressure to the conduit to cause the medicant to flow down the conduit, and a pair of opposed actuator buttons coupled to the pump which, when concurrently pressed, cause the pump to act upon the conduit to cause the medicant to flow down the conduit. 2. The device of claim 1, wherein the pump acts upon the conduit to cause the medicant to flow. 3. The device of claim 2, further comprising a valve upstream from the pump that seals off the conduit from the reservoir as the pump acts upon the conduit. 4. The device of claim 2, wherein the pump is a peristaltic pump. 5. The device of claim 4, wherein the peristaltic pump comprises a linear peristaltic pump. 6. The device of claim 1, further comprising a spring associated with each of the actuator buttons that bias the actuating buttons into a starting position. 7. The device of claim 1, wherein the at least one pressure member is integrally formed with one of the actuator buttons. 8. The device of claim 1, wherein the pump comprises a pair of pressure members that apply pressure to opposite sides of the conduit, and wherein each pressure member is integrally formed with one of the actuator buttons. 9. The device of claim 8, wherein the pressure members are elongated and disposed on opposite sides of the conduit. 10. The device of claim 1, further comprising a check valve downstream from the pump that precludes backflow of the medicant. 11. The device of claim 10, further comprising an actuator that actuates the pump, and wherein the check valve closes in response to the actuator. 12. The device of claim 11, wherein the check valve is coupled to the actuator. 13. The device of claim 11, wherein the check valve is coupled to the actuator. 14. The device of claim 1, further comprising a check valve downstream from the pump that closes the conduit after the pump causes the fluid mendicant to flow to preclude medicant from dripping from the reservoir. 15. The device of claim 14, further comprising an actuator that actuates the pump, and wherein the check valve closes in response to the actuator returning to a start position. 16. A wearable infusion device comprising: a base that contact a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the outlet of the reservoir; a pump that causes the medicant to flow down the conduit; and a pair of opposed actuator buttons coupled to the pump which, when concurrently pressed, cause the pump to act upon the conduit to cause the medicant to flow down the conduit, wherein the pump comprise a pair of pressure members that apply pressure to opposite sides of the conduit, wherein each pressure member is integrally formed with one of the actuator buttons, wherein the pressure members are elongated and disposed on opposite sides of the conduit, and wherein the pressure members are spaced apart from the conduit on opposite sides of the conduit and are progressively more closely spaced in the direction of the reservoir. 17. The device of claim 16, wherein each pressure member and its associated actuator button are formed of one-piece plastic. 18. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the outlet of the reservoir the flexible conduit being configured to be compressed by at least one pressure member; a peristaltic pump comprising at least one pressure member that acts upon the conduit to cause the medicant to flow down the conduit; and a pair of actuator buttons, which, when concurrently pressed, cause the peristaltic pump to act upon the conduit. 19. The device of claim 18, further comprising a check valve downstream from the peristaltic pump that precludes backflow of the medicant. 20. The device of claim 19, wherein the check valve is coupled to at least one of the actuator buttons. 21. The device of claim 18, wherein the peristaltic pump comprises a pair of pressure members disposed on opposite sides of the conduit. 22. The device of claim 21, wherein each pressure member of the pump is integrally formed with one of the actuator buttons. 23. The device of claim 18, further comprising a spring associated with each of the actuator buttons for biasing the actuating buttons into a starting position. 24. A wearable infusion device comprising: a base that contact a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the outlet of the reservoir; a peristaltic pump that acts upon the conduit to cause the medicant to flow down the conduit; and a pair of actuator buttons, which, when concurrently pressed, cause the peristaltic pump to act upon the conduit, wherein the peristaltic pump comprises a pair of pressure members disposed on opposite sides of the conduit, and wherein the pressure members are elongated, spaced apart from the conduit on opposite sides of the conduit, and are progressively more closely spaced in the direction of the reservoir. 25. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a flexible conduit communicating with the outlet of the reservoir; a peristaltic pump that acts upon the conduit to cause the medicant to flow down the conduit; and a pair of actuator buttons, which, when concurrently pressed, cause the peristaltic pump to act upon the conduit, wherein the peristaltic pump comprises a pair of pressure members disposed on opposite sides of the conduit, and wherein each pressure member is plastic and formed as one-piece with an associated one of the actuator buttons. 26. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a conduit communicating with the outlet of the reservoir the flexible conduit being configured to be compressed by at least one pressure member; a pump comprising at least one pressure member that causes the medicant to flow down the conduit; and a pair of actuator buttons coupled to the pump which, when concurrently pressed, cause the pump to cause the medicant to flow down the conduit. 27. The device of claim 26, wherein the actuator buttons are substantially opposed to each other. 28. The device of claim 26, further comprising a housing covering the base that encloses the reservoir, the conduit, and the pump, wherein the housing has an outer surface, and wherein each of the actuator buttons has an actuation surface separated from the housing outer surface to render the actuator buttons tactilely detectable. 29. The device of claim 28, wherein the actuation surfaces of the actuator buttons are recessed with respect to the housing outer surface. 30. The device of claim 26, further comprising a valve upstream from the pump that seals off the conduit from the reservoir as the pump causes the medicant to flow down the conduit, wherein the valve is closed responsive to the actuator buttons. 31. The device of claim 30, wherein the valve is closed when the actuator buttons are concurrently pressed. 32. The device of claim 26, wherein the pump is a mechanical pump. 33. The device of claim 26, further comprising a valve downstream from the pump. 34. The device of claim 33, wherein the valve downstream from the pump is a check valve. 35. The device of claim 33, wherein the valve downstream from the pump is a safety valve. 36. The device of claim 33, wherein the valve downstream from the pump is arranged to be actuated responsive to one of the actuator buttons being depressed. 37. The device of claim 33, wherein the valve downstream from the pump is arranged to be actuated into an open condition responsive to one of the actuator buttons being depressed. 38. A wearable infusion device comprising: a base that contacts a patient's skin; a reservoir arranged to contain a liquid medicant to be delivered beneath a patient's skin, the reservoir having an outlet through which the medicant flows; a conduit communicating with the outlet of the reservoir the flexible conduit being configured to be compressed by at least one pressure member; a pump comprising at least one pressure member that causes the medicant to flow down the conduit; a housing covering the base that encloses the reservoir, the conduit, and the pump, wherein the housing has an outer surface, and at least one actuator button coupled to the pump which, when pressed, causes the pump to cause the medicant to flow down the conduit, the at least one actuator button having an actuation surface separated from the housing outer surface to render the actuator button tactilely detectable. 39. The device of claim 38, wherein the actuation surface is recessed with respect to the housing outer surface.