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A modular external infusion device that controls the rate a fluid is infused into an individual's body, which includes a first module and a second module. More particularly, the first module may be a pumping module that delivers a fluid, such as a medication, to a patient while the second module may

A modular external infusion device that controls the rate a fluid is infused into an individual's body, which includes a first module and a second module. More particularly, the first module may be a pumping module that delivers a fluid, such as a medication, to a patient while the second module may be a programming module that allows a user to select pump flow commands. The second module is removably attachable to the first module.

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1. An external infusion device for infusing a fluid into a user's body comprising: a portable first module configured to be worn by the user, the first module including: a first housing;an alarm in the first housing;a reservoir in the first housing to hold a fluid; anda pump in the first housing to

1. An external infusion device for infusing a fluid into a user's body comprising: a portable first module configured to be worn by the user, the first module including: a first housing;an alarm in the first housing;a reservoir in the first housing to hold a fluid; anda pump in the first housing to pump the fluid from the reservoir; anda portable second module configured to removably attach to the first module so as to form a unitary portable device, the second module including: a second housing; anda display in the second housing,wherein the second module communicates with the first module to provide a fluid delivery program for the flow of the fluid from the first housing, wherein the first module is configured to continue delivering fluid according to the fluid delivery program when the first module is not attached to the second module, wherein the unitary portable device is configured to be worn under the user's clothing, and wherein the alarm is triggered when the user's glucose level value goes beyond an allowed value range. 2. The external infusion device of claim 1, wherein the second module is easily attachable to and removable from the first module without interrupting fluid delivery from the first module. 3. The external infusion device of claim 1, wherein the first module further includes a memory to store the fluid delivery program, a processor to retrieve the fluid delivery program from the memory and to control the pumping of the fluid from the first reservoir, and at least one power supply that provides power to actuate the pump. 4. The external infusion device of claim 1, wherein the second module is configured to removably attach to the first module by at least one of sliding onto the first module, snapping onto the first module, and hook and loop fasteners. 5. The external infusion device of claim 1, wherein the alarm is selected from the group consisting of a tactile alarm, an auditory alarm, and a visual alarm. 6. The external infusion device of claim 1, wherein the alarm is further triggered when there is a pump blockage or when a malfunction is detected. 7. The external infusion device of claim 1, wherein the second module further includes a sensor interface, the sensor being a continuous glucose sensor. 8. The external infusion device of claim 1, wherein the second module further includes a blood glucose meter. 9. The external infusion device of claim 1, wherein the second module includes a Global Positioning System (GPS) device. 10. The external infusion device of claim 1, wherein the communication between the second and first modules is wireless. 11. An external infusion device for infusing a fluid into a user's body comprising: a portable first module configured to be worn by the user, the first module including: a first housing;an alarm in the first housing;a reservoir in the first housing to hold a fluid; anda pump in the first housing to pump the fluid from the reservoir; anda portable second module configured to removably attach to the first module so as to form a unitary portable device, the second module including: a second housing; anda display in the second housing,wherein the second module communicates with the first module to provide a fluid delivery program for the flow of the fluid from the first housing, wherein the first module is configured to continue delivering fluid according to the fluid delivery program when the first module is not attached to the second module, wherein the unitary portable device is configured to be worn under the user's clothing, and wherein the alarm is triggered when communication between the second and the first modules is disrupted. 12. The external infusion device of claim 11, wherein the second module is easily attachable to and removable from the first module without interrupting fluid delivery from the first module. 13. The external infusion device of claim 11, wherein the alarm is further triggered when there is a pump blockage or when a malfunction is detected. 14. The external infusion device of claim 11, wherein the alarm is selected from the group consisting of a tactile alarm, an auditory alarm, and a visual alarm. 15. The external infusion device of claim 11, wherein the second module is configured to removably attach to the first module by at least one of sliding onto the first module, snapping onto the first module, and hook and loop fasteners. 16. The external infusion device of claim 11, wherein the first module further includes a memory to store the fluid delivery program, a processor to retrieve the fluid delivery program from the memory and to control the pumping of the fluid from the first reservoir, and at least one power supply that provides power to actuate the pump. 17. The external infusion device of claim 16, wherein the memory is a flash memory and the at least one power supply is a rechargeable battery. 18. The external infusion device of claim 11, wherein the display is touch sensitive and is configured to display various icons with which the user programs the infusion of fluid into the user's body. 19. An external infusion device for infusing a fluid into a user's body comprising: a portable first module configured to be worn by the user, the first module including: a first housing;an alarm in the first housing;a reservoir in the first housing to hold a fluid; anda pump in the first housing to pump the fluid from the reservoir; anda portable second module configured to removably attach to the first module so as to form a unitary portable device, the second module including: a second housing; anda display in the second housing,wherein the second module communicates with the first module to provide a fluid delivery program for the flow of the fluid from the first housing, wherein the second module is easily attachable to and removable from the first module without interrupting fluid delivery from the first module, wherein the unitary portable device is configured to be worn under the user's clothing, and wherein the alarm is triggered when the user's glucose level value goes beyond an allowed value range. 20. The external infusion device of claim 19, wherein the first module further includes a memory to store the fluid delivery program, a processor to retrieve the fluid delivery program from the memory and to control the pumping of the fluid from the first reservoir, and at least one power supply that provides power to actuate the pump. 21. The external infusion device of claim 19, wherein the second module is configured to removably attach to the first module by at least one of sliding onto the first module, snapping onto the first module, and hook and loop fasteners. 22. The external infusion device of claim 19, wherein the alarm is selected from the group consisting of a tactile alarm, an auditory alarm, and a visual alarm. 23. The external infusion device of claim 19, wherein the alarm is further triggered when there is a pump blockage or when a malfunction is detected. 24. The external infusion device of claim 19, wherein the second module further includes a sensor interface, the sensor being a continuous glucose sensor. 25. The external infusion device of claim 19, wherein the second module further includes a blood glucose meter. 26. The external infusion device of claim 19, wherein the second module includes a Global Positioning System (GPS) device. 27. The external infusion device of claim 19, wherein the communication between the second and first modules is wireless. 28. An external infusion device for infusing a fluid into a user's body comprising: a portable first module configured to be worn by the user, the first module including: a first housing;an alarm in the first housing;a reservoir in the first housing to hold a fluid; anda pump in the first housing to pump the fluid from the reservoir; anda portable second module configured to removably attach to the first module so as to form a unitary portable device, the second module including: a second housing; anda display in the second housing,wherein the second module communicates with the first module to provide a fluid delivery program for the flow of the fluid from the first housing, wherein the second module is easily attachable to and removable from the first module without interrupting fluid delivery from the first module, wherein the unitary portable device is configured to be worn under the user's clothing, and wherein the alarm is triggered when communication between the second and the first modules is disrupted. 29. The external infusion device of claim 28, wherein the alarm is further triggered when there is a pump blockage or when a malfunction is detected. 30. The external infusion device of claim 28, wherein the alarm is selected from the group consisting of a tactile alarm, an auditory alarm, and a visual alarm. 31. The external infusion device of claim 28, wherein the second module is configured to removably attach to the first module by at least one of sliding onto the first module, snapping onto the first module, and hook and loop fasteners. 32. The external infusion device of claim 28, wherein the first module further includes a memory to store the fluid delivery program, a processor to retrieve the fluid delivery program from the memory and to control the pumping of the fluid from the first reservoir, and at least one power supply that provides power to actuate the pump. 33. The external infusion device of claim 32, wherein the memory is a flash memory and the at least one power supply is a rechargeable battery. 34. The external infusion device of claim 28, wherein the display is touch sensitive and is configured to display various icons with which the user programs the infusion of fluid into the user's body.