Pivotable needle unit

• US 20060135913A1
• Filed: 11/04/2005
• Published: 06/22/2006
• Est. Priority Date: 05/08/2003
• Status: Active Grant

• Current Assignee: Novo Nordisk A/S
• Original Assignee: Novo Nordisk A/S
• Inventors: Ethelfeld, Erik Winkel
• Granted Patent: US 7,628,770 B2
• Time in Patent Office: Days
• US Class Current: 604/131
• CPC Class Codes: A61B 5/6849 in combination with a needle set
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

The present invention generally relates to the insertion of needles or needle-like members. Thus, a device comprises a housing having a mounting surface adapted for application to the skin of a subject, and a needle unit connected to the housing by a hinge allowing the needle unit to pivot corresponding to a pivoting axis defined by the hinge, the pivoting axis being arranged substantially in parallel with the mounting surface. The needle unit comprises a needle having a distal pointed portion adapted to penetrate the skin of the subject, the distal portion extending generally perpendicular to the mounting surface, and a proximal portion arranged substantially corresponding to the pivoting axis, whereby the needle unit is arranged to pivot between a first position in which the distal portion of the needle is retracted within the housing, and a second position in which the distal portion projects relative to the mounting surface. The needle may e.g. be in the form of a hollow needle or a needle sensor.

Claims

1. A medical device (100), comprising:

a housing (110, 120) having a mounting surface (121) adapted for application to the skin of a subject,

a transcutaneous device unit (150) connected to the housing thereby providing a hinge (138, 154, 580) allowing the transcutaneous device unit or a portion thereof to pivot corresponding to a pivoting axis defined by the hinge, the pivoting axis being arranged substantially in parallel with the mounting surface,

the transcutaneous device unit comprising a transcutaneous device, the transcutaneous device comprising a distal pointed portion (151) adapted to penetrate the skin of the subject, the distal portion extending generally perpendicular to the mounting surface, and a proximal portion (152) arranged substantially corresponding to the pivoting axis,

wherein the transcutaneous device unit is arranged to provide a pivoting movement between a first position in which the distal portion of the needle is retracted within the housing, and a second position in which the inlet portion projects relative to the mounting surface.

2. A medical device as defined in claim 1, further comprising:

a reservoir (160) adapted to contain a liquid drug and comprising in a situation of use an outlet in fluid communication with the transcutaneous device, and

expelling means for expelling a drug out of the reservoir and through the skin of the subject via the transcutaneous device.

3. A medical device as defined in claim 2, wherein the reservoir comprises outlet means (161) adapted to cooperate with the proximal portion of the transcutaneous device, the outlet means being arranged substantially corresponding to the pivoting axis, thereby allowing the transcutaneous device unit to pivot substantially without non-rotational displacement of the proximal portion of the transcutaneous device relative to the outlet means.

4. A medical device as defined in claim 3, wherein the reservoir and the proximal portion are moveable relative to each other substantially in parallel with the pivoting axis, between a disconnected position in which there is no fluid communication between the reservoir and the proximal portion of the transcutaneous device, and a connected position in which fluid communication between the reservoir and the proximal portion of the transcutaneous device is established.

5. A medical device as defined in claim 4, wherein the proximal portion of the transcutaneous device comprises a pointed end, and the outlet means of reservoir comprises a needle-penetratable septum.

6. A medical device as defined claim 1, further comprising actuatable driving means (137) disposed within the housing and adapted to pivot the transcutaneous device unit from the first position to the second position.

7. A medical device as defined in claim 6, further comprising actuation means (130) moveable, relative to the housing, from a first position to a second position thereby actuating the driving means.

8. A medical device as defined in claim 7, wherein the reservoir (160) is connected to the actuation means, whereby movement of the actuation means between the first and the second position causes the reservoir to be arranged in fluid communication with the infusion needle.

9. A medical device as defined in claim 5, further comprising actuation means (130) moveable, relative to the housing, from a first position to a second position thereby actuating the driving means (137), wherein the reservoir is connected to the actuation means such that movement of the actuation means between the first and the second position causes the reservoir to be arranged in fluid communication with the transcutaneous device, the proximal portion of the transcutaneous device being introduced through the needle-penetratable septum either before or after the transcutaneous device unit is pivoted from the first position to the second position.

10. A medical device as defined in claim 1, wherein the transcutaneous device unit comprises a transcutaneous device carrier (153, 154, 550), the transcutaneous device being carried by the carrier, the carrier being connected to the housing.

11. A medical device as defined in claim 10, wherein the transcutaneous device carrier comprises a pump (940) for pumping a liquid between the proximal and the distal portion of the transcutaneous device.

12. A medical device as defined in claim 1, wherein the transcutaneous device is a unitary hollow infusion needle forming the distal and proximal portions.

13. A medical device as defined claim 1, wherein the distal portion is formed by a cannula (351) in combination with a pointed insertion needle (361) accommodated at least partially within the cannula, the cannula having a distal opening, wherein the insertion needle is arranged to be moveable away from the distal opening when the cannula and the insertion needle have been moved to their second position.

14. A transcutaneous device unit (550) comprising first and second portions (570, 560) connected by a hinge (580) allowing the first portion to pivot corresponding to a pivoting axis defined by the hinge,

the first portion comprising a transcutaneous device (590) having a distal pointed portion (591) adapted to penetrate the skin of a subject, the distal portion extending from the first portion, and a proximal portion (592) arranged substantially corresponding to the pivoting axis,

wherein the first portion can be pivoted between a first position and a second position relative to the second portion and corresponding to the pivoting axis.

15. A transcutaneous device unit as defined in claim 14, further comprising biasing means biasing the first portion from its first to its second position.

16. A transcutaneous device unit as defined in claim 15, further comprising releasable coupling means (563) for holding the first portion in its first position against the biasing force of the biasing means.