Multi-cartridge fluid delivery device
View Patent ↗A fluid delivery device for administering a first medicament and a second medicament includes a first fluid reservoir configured to contain the first medicament and a second fluid reservoir configured to contain the second medicament. The fluid delivery device may include one or more basal drive mechanisms to provide a basal delivery of one or more of the first and second medicaments. The fluid delivery device may further include one or more bolus drive mechanisms to provide a bolus delivery of one or more of the first and second medicaments.
1. A method of administering first and second medicaments from a fluid delivery device, the method comprising:
forcing hydraulic fluid from a hydraulic fluid reservoir into a first pump chamber, the hydraulic fluid in the first pump chamber exerting a force on a first piston to expel at least a portion of the first medicament through an aperture of a first fluid reservoir and deliver a first basal delivery of the first medicament;
forcing hydraulic fluid from the hydraulic fluid reservoir into a second pump chamber, the hydraulic fluid in the second pump chamber exerting a force on a second piston to expel at least a portion of the second medicament through an aperture of a second fluid reservoir and deliver a second basal delivery of the second medicament.
2. The method of claim 1 , wherein forcing hydraulic fluid from the hydraulic fluid reservoir includes applying a spring force to a piston within the hydraulic fluid reservoir.
3. The method of claim 1 , wherein forcing the hydraulic fluid from the hydraulic fluid reservoir includes forcing hydraulic fluid from the hydraulic fluid reservoir through a flow restrictor and into the first and second pump chambers.
4. A method of administering first and second medicaments from a fluid delivery device, the method comprising:
delivering a first basal delivery of the first medicament, and
delivering a second basal delivery of the second medicament,
wherein the fluid delivery device comprises:
a housing;
a first reservoir within the housing and configured to contain the first medicament;
a second reservoir within the housing and configured to contain the second medicament;
a first basal drive mechanism within the housing and having a first hydraulic fluid reservoir;
a first pump chamber in fluid communication with the first hydraulic fluid reservoir of the first basal drive mechanism via a first flow restrictor, the first pump chamber configured to engage the first reservoir to provide a basal delivery of the first medicament during use;
a second basal drive mechanism within the housing and having a second hydraulic fluid reservoir;
a second pump chamber in fluid communication with the second hydraulic fluid reservoir of the second basal drive mechanism via a second flow restrictor, the second pump chamber configured to engage the second reservoir to provide a basal delivery of the second medicament during use; and
a needle having a first end configured for fluid communication with the first reservoir and a second end configured to extend exteriorly from the housing.
5. The method of claim 4 , wherein the fluid delivery device further comprises a bolus drive mechanism coupled to the first pump chamber and configured to provide a bolus delivery of the first medicament.
6. The method of claim 5 , wherein the bolus drive mechanism is coupled to the second pump chamber and is configured to provide a bolus delivery of the second medicament.
7. The method of claim 5 , wherein the bolus drive mechanism is a first bolus drive mechanism and wherein the fluid delivery device further comprises a second bolus drive mechanism coupled to the second pump chamber and configured to provide a bolus delivery of the second medicament.
8. The method of claim 5 , wherein the bolus drive mechanism includes a ratchet and a bolus piston coupled to the ratchet.
9. The method of claim 8 , wherein the bolus of the first medicament is larger than the bolus of the second medicament.
10. The method of claim 4 , wherein the first and second basal drive mechanisms each include a coil spring coupled to a drive piston.
11. The method of claim 4 , wherein the fluid delivery device further comprises a first delivery piston coupled to the first pump chamber and positioned within the first fluid reservoir to exert a force on the first medicament within the first fluid reservoir and a second delivery piston coupled to the second pump chamber and positioned within the second fluid reservoir to exert a force on the second medicament within the second fluid reservoir.
12. The method of claim 4 , wherein the fluid delivery device is an ambulatory infusion pump.
13. The method of claim 4 , wherein the needle includes a third end configured for fluid communication with the second reservoir.
14. The method of claim 4 , wherein the needle configured for fluid communication with the first reservoir is a first needle, the fluid delivery device further comprising a second needle configured for fluid communication with the second reservoir.
15. A method of administering first and second medicaments from a fluid delivery device, the method comprising:
delivering a first basal delivery of the first medicament, and
delivering a second basal delivery of the second medicament,
wherein the fluid delivery device comprises:
a housing;
a first reservoir within the housing and configured to contain the first medicament;
a second reservoir within the housing and configured to contain the second medicament;
a basal drive mechanism within the housing and having a hydraulic fluid reservoir;
a first pump chamber in fluid communication with the hydraulic fluid reservoir of the basal drive mechanism via a first flow restrictor, the first pump chamber configured to engage the first reservoir to provide basal delivery of the first medicament during use; and
a second pump chamber in fluid communication with the hydraulic fluid reservoir of the basal drive mechanism via a second flow restrictor, the second pump chamber configured to engage the second reservoir to provide basal delivery of the second medicaments during use.
16. The method of claim 15 , wherein the fluid delivery device further comprises a bolus drive mechanism coupled to the first and second pump chambers to provide bolus deliveries of the first and second medicaments.
17. The method of claim 16 , wherein the bolus drive mechanism includes a ratchet and piston.
18. The method of claim 16 , wherein the bolus of the first medicament is larger than the bolus of the second medicament.
19. The method of claim 15 , wherein the fluid delivery device further comprises a first bolus drive mechanism coupled to the first pump chamber to provide a bolus delivery of the first medicament and a second bolus drive mechanism coupled to the second pump chamber to provide a bolus delivery of the second medicament.
20. The method of claim 15 , wherein the fluid delivery device further comprises a needle having a first end configured for fluid communication with the first reservoir, a second end configured for fluid communication with the second reservoir and a third end configured to engage a user.
21. The method of claim 15 , wherein the fluid delivery device further comprises a first needle configured for fluid communication with the first reservoir and a user and a second needle configured for fluid communication with the second reservoir and the user.
22. The method of claim 15 , wherein the fluid delivery device is an ambulatory infusion pump.