Infusion device and method thereof

• US 20040006316A1
• Filed: 07/02/2002
• Published: 01/08/2004
• Est. Priority Date: 07/02/2002
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Patton Medical Devices LP
• Inventors: Patton, Catherine C.
• Granted Patent: US 7,338,465 B2
• Time in Patent Office: Days
• US Class Current: 604/244
• CPC Class Codes: A61M 2039/027 having a particular valve, seal or septum septum A61M2039/0036
• CPC Class Codes: A61M 2039/0294 having a specific shape matching the shape of a tool to be inserted therein, e.g. for easy introduction, for sealing purposes, guide
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053
• CPC Class Codes: A61M 39/04 having pierceable self-sealing members
• CPC Class Codes: A61M 5/162 Needle sets, i.e. connections by puncture between reservoir and tube ; Connections between reservoir and tube in jet-action syringes A61M5/30; connectors for tubes having sealed ends and a needle for piercing them A61M39/14

Abstract

The disclosures made herein relate to an infusion device specifically adapted for syringe injections. In one embodiment of the disclosures made herein, an infusion device comprises a body including an accessible surface having a single inlet port therein, an engagement surface having a single outlet port therein, a medication delivery channel extending between the single inlet port and the single outlet port, and an identification feature on the accessible surface of the body adjacent to the single inlet port. The single inlet port of the medication delivery channel is tapered thereby forming a funnel-shaped entry into the medication delivery channel. A cannula is coupled to the body at the single outlet port and is adapted for receiving medication from the single outlet port and transmitted the medication there through. The cannula has an essentially straight longitudinal axis that extends generally perpendicular to the engagement surface of the body. A first self-sealing member is attached to the body and forms a first septum for the medication delivery channel. A needle stop is positioned within the medication delivery channel. An infusion device in accordance with embodiments of the disclosures made herein may be mounted on a patient with the cannula extending into or through subcutaneous tissue of the patient. Once the infusion device is mounted on the patient, the patient may use a syringe and injection needle for receiving an injection of one or more medications via the infusion device. An advantage of receiving an injection via an infusion device as disclosed herein is that the patient is spared having their skin pierced by the injection needle. After an initial skin piercing by an insertion needle of the infusion device, all injections are facilitated via the injection needle being engaged with the infusion device rather than through the skin of the patient.

Claims

1. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a single inlet port therein, an engagement surface having a single outlet port therein and a medication delivery channel extending between the single inlet port and the single outlet port;

a cannula coupled to the body at the single outlet port, wherein the cannula is adapted for receiving medication from the single outlet port and transmitted said medication there through; and

a first self-sealing member attached to the body and forming a first septum for the medication delivery channel.

2. The device of claim 1 wherein a portion of the medication delivery channel adjacent to the single inlet port is tapered, thereby forming a funnel-shaped entry into the medication delivery channel.

3. The device of claim 2 wherein:

the single inlet port of the medication delivery channel defines an opening at the accessible surface of the body; and

the opening has a minor diametrical dimension at least about two times greater than a minor diametrical dimension of the medication delivery channel.

4. The device of claim 2 wherein:

the single inlet port and the medication delivery channel each have a substantially circular cross-sectional profile;

the single inlet port of the medication delivery channel defines a circular shaped opening at the accessible surface of the body; and

the circular shaped opening has a diameter at least about two times greater than a minor diameter of the medication delivery channel.

5. The device of claim 1 wherein the medication delivery channel and the cannula have a common essentially-straight longitudinal axis.

6. The device of claim 5 wherein:

the common longitudinal axis extended generally perpendicular to the engagement surface of the body.

7. The device of claim 1 wherein the cannula has n essentially straight longitudinal axis extending generally perpendicular to the engagement surface of the body.

8. The device of claim 1 wherein:

the single inlet port of the medication delivery channel defines an opening at the accessible surface of the body; and

the opening has a minor diametrical dimension at least about two times greater than a minor diametrical dimension of the medication delivery channel.

9. The device of claim 1 wherein:

the single inlet port and the medication delivery channel each have a substantially circular cross-sectional profile;

the single inlet port of the medication delivery channel defines a circular shaped opening at the accessible surface of the body; and

the circular shaped opening has a diameter at least about two times greater than a minor diameter of the medication delivery channel.

10. The device of claim 1 wherein the body further includes an identification feature adjacent to the single inlet port of the medication delivery channel for identifying the medication delivery channel.

11. The device of claim 10 wherein the identification feature is at least partially raised with respect to the accessible surface of the body.

12. The device of claim 10 wherein the identification feature is at least partially recessed with respect to the accessible surface of the body.

13. The device of claim 10 wherein the identification feature encompasses the single inlet port of the medication delivery channel.

14. The device of claim 1 wherein the first self-sealing member includes an identification feature adjacent to the single inlet port of the medication delivery channel for identifying the medication delivery channel.

15. The device of claim 1, further comprising:

a needle stop positioned within the medication delivery channel.

16. The device of claim 15 wherein the needle stop is positioned adjacent to the single outlet port of the medication delivery channel.

17. The device of claim 1, further comprising:

a second self-sealing member mounted on the body and forming a second septum for the medication delivery channel, wherein the first septum is adjacent to the single inlet port and the second septum is adjacent to the single outlet port.

18. The device of claim 1 wherein an exposed surface of the first septum is essentially contiguous with the accessible surface of the body.

19. The device of claim 1 wherein the first septum extends across the medication delivery channel adjacent to the single inlet port.

20. The device of claim 1 wherein the first septum extends across the medication delivery channel adjacent to the single outlet port.

21. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a single inlet port therein, an engagement surface having a single outlet port therein, a medication delivery channel extending between the single inlet port and the single outlet port, and an identification feature on the accessible surface of the body adjacent to the single inlet port, wherein the medication delivery channel is tapered adjacent to the single inlet port thereby forming a funnel-shaped entry into the medication delivery channel;

a cannula coupled to the body at the single outlet port, wherein the cannula is adapted for receiving medication from the single outlet port and transmitted said medication there through, wherein the cannula includes a generally straight longitudinal axis extending generally perpendicular to the engagement surface of the body;

a first self-sealing member attached to the body and forming a first septum for the medication delivery channel, wherein an exposed surface of the first self-sealing member is essentially contiguous with the accessible surface of the body; and

a needle stop positioned within the medication delivery channel.

22. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a single inlet port therein, an engagement surface having a single outlet port therein, a medication delivery channel extending between the single inlet port and the single outlet port, an identification feature on the accessible surface of the body adjacent to the single inlet port, wherein the medication delivery channel adjacent to the single inlet port is tapered thereby forming a funnel-shaped entry into the medication delivery channel;

a cannula coupled to the body at the single outlet port, wherein the cannula is adapted for receiving medication from the single outlet port and transmitted said medication there through, wherein the cannula has an essentially straight longitudinal axis extending generally perpendicular to the engagement surface of the body; and

means attached to the body for limiting flow of a substance from the medication delivery channel through the single inlet port.

23. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a plurality of inlet ports therein, an engagement surface having a plurality of outlet ports therein and a discrete medication delivery channel extending between a respective one of said inlet ports and a respective one of said outlet ports;

a plurality of cannulas, each one of said cannulas coupled to the body at a respective one of said outlet ports, wherein each one of said cannulas is adapted for receiving medication from the respective one of said outlet ports and transmitted said medication there through; and

a first self-sealing member attached to the body and forming a first septum for at least one discrete medication delivery channel.

24. The device of claim 23 wherein each discrete medication delivery channels is spaced apart from each adjacent discrete medication delivery channel by a prescribed distance.

25. The device of claim 23 wherein an exposed surface of the first septum each one of said first self-sealing septums is essentially contiguous with the accessible surface of the body.

26. The device of claim 23 wherein each one of said discrete medication delivery channels is tapered adjacent to a respective one of the inlet ports, thereby forming a respective funnel-shaped entry into each one of said discrete medication delivery channels.

27. The device of claim 26 wherein:

the inlet port of each one of said discrete medication delivery channels defines a respective opening at the accessible surface of the body; and

each respective opening has a minor diametrical dimension at least about two times greater than a minor diametrical dimension of the medication delivery channel.

28. The device of claim 26 wherein:

the inlet port of each said discrete medication delivery channel and each one of said discrete medication delivery channels each have a substantially circular cross-sectional profile;

the inlet port of each one of said discrete medication delivery channel defines a respective circular shaped opening at the accessible surface of the body; and

each respective circular shaped opening has a diameter at least about two times greater than a minor diameter a corresponding one of said discrete medication delivery channels.

29. The device of claim 23 wherein:

the inlet port of each one of said discrete medication delivery channels defines a respective opening at the accessible surface of the body; and

each respective opening has a minor diametrical dimension at least about two times greater than a minor diametrical dimension of the medication delivery channel.

30. The device of claim 23 wherein:

the inlet port of each said discrete medication delivery channel and each one of said discrete medication delivery channels each have a substantially circular cross-sectional profile;

the inlet port of each one of said discrete medication delivery channel defines a respective circular shaped opening at the accessible surface of the body; and

each respective circular shaped opening has a diameter at least about two times greater than a minor diameter a corresponding one of said discrete medication delivery channels.

31. The device of claim 23 wherein each medication delivery channel and a corresponding one of said cannula have a respective common essentially-straight longitudinal axis.

32. The device of claim 31 wherein each respective common essentially-straight longitudinal axis extends generally perpendicular to the engagement surface of the body.

33. The device of claim 23 wherein each one of said cannulas includes an essentially straight longitudinal axis extending generally perpendicular to the engagement surface of the body.

34. The device of claim 23 wherein the body further includes a first identification feature at the accessible surface adjacent to at least one of said inlet ports.

35. The device of claim 34 wherein the first identification feature is at least partially raised with respect to the accessible surface of the body.

36. The device of claim 34 wherein the first identification feature is at least partially recessed with respect to the accessible surface of the body.

37. The device of claim 34 wherein the first identification feature encompasses the inlet port of the first one of said discrete medication delivery channel.

38. The device of claim 34 wherein:

the body further includes a second identification feature adjacent to the inlet port associated with a second one of said discrete medication delivery channels; and

the second identification feature is identifiably different than the first identification feature.

39. The device of claim 23 wherein the first self-sealing member includes a first identification feature adjacent to the inlet port associated with a first one of said discrete medication delivery channels for identifying the first one of said discrete medication delivery channels.

40. The device of claim 23, further comprising:

a needle stop positioned within at least one of said discrete the medication delivery channel.

41. The device of claim 40 wherein the needle stop is positioned adjacent to the outlet port of said at least one of said discrete medication delivery channels.

42. The device of claim 23 wherein a cannula length of a first one of said cannulas is greater than a cannula length of a second one of said cannulas.

43. The device of claim 23, further comprising:

a second self-sealing member attached to the body and forming a second septum for at least the first one of said discrete medication delivery channels, wherein the first septum is adjacent to the inlet port of said at least one of said discrete medication delivery channels and the second septum is adjacent to the outlet port of said at least one of said discrete medication delivery channels.

44. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a plurality of inlet ports therein, an engagement surface having a plurality of outlet ports therein, a discrete medication delivery channel extending between a respective one of said inlet ports and a respective one of said outlet ports, and an identification feature at the accessible surface adjacent to one at least one of said the inlet ports;

a plurality of cannulas, each one of said cannulas coupled to the body at a respective one of said outlet ports, wherein each one of said cannula is adapted for receiving medication from the respective one of said outlet ports and transmitted said medication there through, wherein each one of said cannulas has an essentially straight longitudinal axis extending generally perpendicular to the engagement surface of the body; and

a first self-sealing member attached to the body and forming a first septum for at least a first one of said discrete medication delivery channels.

45. An infusion device specifically adapted for receiving an injection from a syringe, comprising:

a body including an accessible surface having a plurality of inlet ports therein, an engagement surface having a plurality of outlet ports therein, a discrete medication delivery channel extending between a respective one of said inlet ports and a respective one of said outlet ports, and an identification feature at the accessible surface adjacent to one at least one of said the inlet ports;

a plurality of cannulas, each one of said cannulas coupled to the body at a respective one of said outlet ports, wherein each one of said cannula is adapted for receiving medication from the respective one of said outlet ports and transmitted said medication there through, wherein each one of said cannulas has an essentially straight longitudinal axis extending generally perpendicular to the engagement surface of the body; and

means attached to the body for limiting flow of a substance from each one of said discrete medication delivery channels through the respective one of said inlet ports.

46. A method for delivering medication to a patient, comprising:

mounting a infusion device on a patient, wherein the infusion device includes;

a body including an accessible surface having a plurality of inlet ports therein, an engagement surface having a plurality of outlet ports therein and a discrete medication delivery channel extending between a respective one of said inlet ports and a respective one of said outlet ports;

a plurality of cannulas, each one of said cannulas coupled to the body at a respective one of said outlet ports, wherein each one of said cannula is adapted for receiving medication from the respective one of said outlet ports and transmitted said medication there through; and

a first self-sealing member attached to the body and forming a first septum for at least a first one of said discrete medication delivery channels;

facilitating a first portion of a plurality of medication injections to the patient via a first one of said medication delivery channels; and

facilitating a second portion of the plurality of medication injections to the patient via a second one of said medication delivery channels.

47. The method of claim 46 wherein:

each one of said cannulas has an essentially straight longitudinal axis;

the essentially straight longitudinal axis of each one of said cannulas extends generally perpendicular to the engagement surface of the body; and

mounting the infusion device includes inserting each one of said cannulas into subcutaneous tissue of the patient until the engagement surface of the body engages a skin surface of the patient.

48. The method of claim 47 wherein the device further includes a plurality of insertion needles, each one of said insertion needles extend through a channel of a respective one of said cannulas for retaining the respective one of said cannulas in a generally straight orientation while inserting the respective one of said cannulas into said subcutaneous tissue.

49. The method of claim 46 wherein a cannula length of the first one of said cannulas is greater than a cannula length of the second one of said cannulas, thereby enabling the first portion of the plurality of medication injections to be delivered at a first distance below a skin surface of the patient and enabling the second portion of the plurality of medication injections to be delivered at a second distance below the skin surface of the patient.

50. A method for delivering medication to a patient, comprising:

mounting a plurality of infusion devices on a patient, each one of said infusion devices having;

a body including an accessible surface having a inlet port therein, an engagement surface having a outlet port therein and a medication delivery channel extending between the inlet port and the outlet port;

a cannula coupled to the body at the outlet port, wherein the cannula is adapted for receiving medication from the outlet port and transmitted said medication there through; and

a first self-sealing member attached to the body and forming a first septum for the medication delivery channel;

facilitating a first portion of a plurality of medication injections to the patient via the medication delivery channel of a first one of said medication delivery devices; and

facilitating a second portion of the plurality of medication injections to the patient via the medication delivery channel of a second one of said medication delivery devices.

51. The method of claim 50 wherein:

the cannula of each one of said infusion devices has an essentially straight longitudinal axis;

the essentially straight longitudinal axis of each cannula extends generally perpendicular to the engagement surface the respective body; and

mounting the plurality of infusion devices includes inserting the cannula of a respective one of said infusion devices into subcutaneous tissue of the patient until the engagement surface of the respective one of said infusion devices engages a skin surface of the patient.

52. The method of claim 51 wherein each one of said infusion devices further includes an insertion needle extending through a channel of the respective for retaining the respective cannula in a generally straight orientation while inserting the respective cannula into said subcutaneous tissue.

53. The method of claim 50 wherein a cannula length of the first one of said medication delivery devices is greater than a cannula length of the second one of said medication delivery devices, thereby enabling the first portion of the plurality of medication injections to be delivered at a first distance below a skin surface of the patient and enabling the second portion of the plurality of medication injections to be delivered at a second distance below the skin surface of the patient.

54. The method of claim 50 wherein:

mounting the plurality of infusion devices includes mounting the first one of said infusion devices at a first location on the patient and mounting the second one of the infusion devices at a second location on the patient;

the first location being located on a first physiological portion of the patient; and

the second location being located on a second physiological portion of the patient.

55. The method of claim 50 wherein:

a cannula length of the first one of said medication delivery devices is greater than a cannula length of the second one of said medication delivery devices, thereby enabling the first portion of the plurality of medication injections to be delivered at a first distance below a skin surface of the patient and enabling the second portion of the plurality of medication injections to be delivered at a second distance below the skin surface of the patient;

mounting the plurality of infusion devices includes mounting the first one of said infusion devices at a first location on the patient and mounting the second one of the infusion devices at a second location on the patient;

the first location being located on a first physiological portion of the patient having a first subcutaneous tissue depth; and

the second location being located on a second physiological portion of the patient having a second subcutaneous tissue depth.