Indwelling assembly

• US 9,700,671 B2
• Filed: 03/29/2016
• Issued: 07/11/2017
• Est. Priority Date: 03/26/2010
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Corporation
• Inventors: Ishida, Masahiro
• Primary Examiner(s): STIGELL, THEODORE J
• Application Number:
  US15/083,943
• Publication Number:
  US 20160206812A1
• Time in Patent Office: 469 Days
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• 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

An indwelling assembly includes an inner needle having a sharp needlepoint, an inner needle hub fixed to the inner needle, a hollow elongated outer member in which the inner needle is positioned and movable in a distal direction relative to the inner needle after puncturing the blood vessel to position the elongated outer member at a desired position in the blood vessel, an outer member hub fixed to hollow elongated outer member, a projection removably connected to the outer member hub and configured to be engaged by a finger of the user to apply a force to the projection causing the outer member hub and the hollow elongated outer member to move together with the projection in the distal direction relative to the inner needle and the inner needle hub, and an elongated movable member that is movable relative to the hollow elongated outer member and the outer member hub.

Claims

1. A method comprising:

positioning an assembled indwelling assembly adjacent a patient, the assembled indwelling assembly comprising;

an inner needle having a sharp needlepoint at a distal end;

an inner needle hub fixed to a proximal portion of the inner needle;

a hollow outer member in which the inner needle is positioned, the hollow outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow outer member so that the hollow outer member and the outer member hub move together;

an advancing member detachably connected to the outer member hub to advance the outer member hub and the hollow outer member by advancing the advancing member; and

an elongated housing projecting in a distal direction from the inner needle hub, the elongated housing possessing a distal end positioned distal of the proximal portion of the hollow outer member in an assembled state of the indwelling assembly before use;

gripping the elongated housing and moving the indwelling assembly to puncture a blood vessel of the patient with the sharp needlepoint of the inner needle, the gripping of the elongated housing comprising gripping the elongated housing while the outer member hub and the proximal portion of the hollow outer member are positioned in the elongated housing;

advancing the hollow outer member in a distal direction relative to the inner needle such that a distal portion of the hollow outer member is inserted to a target position in the blood vessel, the advancing of the hollow outer member in the distal direction relative to the inner needle being performed by advancing the advancing member relative to the housing, the advancing of the hollow outer member being performed after the puncturing of the blood vessel with the sharp needlepoint of the inner needle;

moving the inner needle hub in a proximal direction using one hand while holding the advancing member with an other hand to pull-out the inner needle from the hollow outer member and to entirely remove the inner needle from the hollow outer member; and

detaching the advancing member from the outer member hub.

2. The method according to claim 1, wherein the hollow outer member is an outer needle, the outer member hub is an outer needle hub, and the advancing member is a pressing member connected to the outer needle hub at a hinge connection.

3. The method according to claim 1, wherein the hollow outer member is an outer needle, the outer member hub is an outer needle hub, and the elongated housing is a grip member.

4. The method according to claim 3, wherein the grip member possesses a longitudinal extent, at least a portion of the longitudinal extent of the grip member is U-shaped in transverse cross-section.

5. The method according to claim 4, wherein the outer member hub possesses an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the gripping of the elongated housing comprising gripping the elongated housing while the lower portion of the outer peripheral surface of the outer member hub is positioned in the U-shaped portion of the elongated housing.

6. The method according to claim 1, wherein the outer member hub includes an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the advancing member being connected to the outer member hub at the upper portion of the outer peripheral surface of the outer member hub.

7. The method according to claim 1, wherein the detaching of the advancing member from the outer member hub is performed after the hollow outer member is positioned at the target position in the blood vessel.

8. The method according to claim 1, wherein the detaching of the advancing member from the outer member hub is performed after the inner needle is entirely removed from the hollow outer member.

9. The method according to claim 1, wherein the elongated housing possesses an interior and an open upper end, and further comprising a cover section extending across the open upper end of the elongated housing and covering the interior of the elongated housing for a part of the longitudinal extent of the elongated housing;

and the cover part covering, in the assembled state of the indwelling assembly before use, a portion of the interior of the elongated housing in which the outer member hub and a part of the advancing member are positioned, a portion of the advancing member being exposed outside the cover part; and

the advancing of the advancing member relative to the housing comprising engaging with a finger the portion of the advancing member that is exposed outside the cover part and moving the portion of the advancing member in a distal direction to move the advancing member in the distal direction and thereby advance the hollow outer member in the distal direction relative to the inner needle and the elongated housing such that the distal portion of the hollow outer member is positioned at the target position in the blood vessel.

10. The method according to claim 9, wherein the detaching of the advancing member from the outer member hub is performed after the inner needle is entirely removed from the hollow outer member.

11. The method according to claim 9, wherein the detaching of the advancing member from the outer member hub is performed after the hollow outer member is positioned at the target position in the blood vessel.

12. A method comprising:

positioning an assembled indwelling assembly adjacent a patient, the assembled indwelling assembly comprising;

an inner needle having a sharp needlepoint at a distal end;

an inner needle hub fixed to a proximal portion of the inner needle;

a hollow outer member in which the inner needle is positioned, the hollow outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow outer member so that the hollow outer member and the outer member hub move together, the outer member hub possessing a distal end, a proximal end and an axial midpoint between the distal and proximal ends;

an advancing member detachably connected to the outer member hub to advance the outer member hub and the hollow outer member by advancing the advancing member; and

an elongated housing connected to the inner needle hub so that axial movement of the elongated housing results in axial movement of the inner needle hub, the elongated housing axially overlapping the axial midpoint of the outer member hub in an assembled state of the indwelling assembly before use;

puncturing a blood vessel of the patient with the sharp needlepoint of the inner needle of the assembled indwelling assembly while gripping the elongated housing;

advancing the advancing member in a distal direction relative to the inner needle while the advancing member is connected to the outer member hub so that the advancing of the advancing member also advances the hollow outer member and the outer member hub relative to the inner needle, the inner needle hub and the elongated housing, the advancing of the advancing member being performed to move the hollow outer member in the blood vessel and position the hollow outer member at a target position in the blood vessel, the advancing of the advancing member being performed after the puncturing of the blood vessel with the sharp needlepoint of the inner needle;

moving the inner needle and the inner needle hub in a proximal direction while maintaining the hollow outer member at the target position in the blood vessel to pull-out the inner needle from the hollow outer member and to entirely remove the inner needle from the hollow outer member; and

detaching the advancing member from the outer member hub.

13. The method according to claim 12, wherein the outer member hub includes an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the advancing member being connected to the outer member hub at the upper portion of the outer peripheral surface of the outer member hub.

14. The method according to claim 12, wherein the detaching of the advancing member from the outer member hub is performed after the hollow outer member is positioned at the target position in the blood vessel.

15. The method according to claim 12, wherein the detaching of the advancing member from the outer member hub is performed after the inner needle is entirely removed from the hollow outer member.

16. The method according to claim 12, wherein the elongated housing projects in a distal direction from the inner needle hub, the elongated housing possessing a distal end positioned distal of the proximal portion of the hollow outer member in the assembled state of the indwelling assembly before the puncturing of the blood vessel, the puncturing of the blood vessel of the patient with the sharp needlepoint of the inner needle method further comprising, after the gripping of the elongated housing, moving the gripped indwelling assembly toward the patient to puncture the blood vessel.

17. The method according to claim 16, wherein the elongated housing possesses a longitudinal extent, at least a portion of the longitudinal extent of the grip member is U-shaped in transverse cross-section, the gripping of the elongated housing comprising gripping the portion of the elongated housing that is U-shaped in transverse cross-section.

18. The method according to claim 17, wherein the outer member hub possesses an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the gripping of the elongated housing comprising gripping the elongated housing while the lower portion of the outer peripheral surface of the outer member hub is positioned in the U-shaped portion of the elongated housing.

19. A method comprising:

positioning an assembled indwelling assembly adjacent a patient, the assembled indwelling assembly comprising;

an inner needle having a sharp needlepoint at a distal end;

an inner needle hub fixed to a proximal portion of the inner needle;

a hollow outer member in which the inner needle is positioned, the hollow outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow outer member so that the hollow outer member and the outer member hub move together;

a main body detachably connected to the outer member hub so that advancement of the main body results in advancement of the hollow outer member and the outer member hub, and including a plurality of finger-engaging projections projecting from the main body and engageable by a user to advance the main body, the main body overlying at least a portion of the inner needle in an assembled state of the indwelling assembly before use; and

an elongated housing connected to the inner needle hub so that axial movement of the elongated housing results in axial movement of the inner needle hub, the elongated housing underlying the at least a portion of the inner needle in the assembled state of the indwelling assembly before use;

puncturing a blood vessel of the patient with the sharp needlepoint of the inner needle of the assembled indwelling assembly while gripping the elongated housing;

engaging a finger on at least one of the finger-engaging projections projecting from the main body and using the finger to advance the main body in a distal direction relative to the inner needle while the main body is connected to the outer member hub to advance the hollow outer member and the outer member hub relative to the inner needle, the inner needle hub and the elongated housing, the advancing of the main body being performed after the puncturing of the blood vessel with the sharp needlepoint of the inner needle;

the advancing of the main body comprising advancing the main body to position the hollow outer member at a target position in the blood vessel;

moving the inner needle and the inner needle hub in a proximal direction while maintaining the hollow outer member at the target position in the blood vessel to pull-out the inner needle from the hollow outer member and to entirely remove the inner needle from the hollow outer member; and

detaching the advancing member from the outer member hub.

20. The method according to claim 19, wherein the outer member hub possesses a proximal end, the finger-engaging projections being positioned distal of the proximal end of the outer member hub.

21. The method according to claim 19, wherein the outer member hub possesses an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the main body being connected to the outer member hub at the upper portion of the outer peripheral surface of the outer member hub.

22. The method according to claim 19, wherein the detaching of the advancing member from the outer member hub is performed after the hollow outer member is positioned at the target position in the blood vessel.

23. The method according to claim 19, wherein the detaching of the advancing member from the outer member hub is performed after the inner needle is entirely removed from the hollow outer member.

24. The method according to claim 19, wherein the elongated housing projects in a distal direction from the inner needle hub and possesses a distal end positioned distal of the proximal portion of the hollow outer member in the assembled state of the indwelling assembly before the puncturing of the blood vessel of the patient with the sharp needlepoint of the inner needle, the elongated housing possesses an interior and an open upper end, the main body extending across the open upper end of the elongated housing and covering the interior of the elongated housing for a part of the longitudinal extent of the elongated housing;

and the main body covering, in the assembled state of the indwelling assembly before the puncturing of the blood vessel of the patient with the sharp needlepoint of the inner needle, a portion of the interior of the elongated housing in which the outer member hub and a part of the main body are positioned, a portion of the main body being exposed outside the cover part; and

the advancing of the main body in the distal direction relative to the inner needle comprising engaging with a finger the portion of the main body that is exposed outside the cover part and moving the portion of the main body in a distal direction to move the main body in the distal direction and thereby advance the hollow outer member in the distal direction relative to the inner needle and the elongated housing such that the distal portion of the hollow outer member is positioned at the target position in the blood vessel.

25. The method according to claim 19, wherein the elongated housing projects in a distal direction from the inner needle hub, the elongated housing possessing a distal end positioned distal of the proximal portion of the hollow outer member in the assembled state of the indwelling assembly before the puncturing of the blood vessel, the puncturing of the blood vessel of the patient with the sharp needlepoint of the inner needle method further comprising gripping the elongated housing with one hand and moving the one hand toward the patient while gripping the elongated housing to puncture the blood vessel.

26. The method according to claim 19, wherein the elongated housing possesses a longitudinal extent, at least a portion of the longitudinal extent of the grip member is U-shaped in transverse cross-section, the gripping of the elongated housing comprising gripping the portion of the elongated housing that is U-shaped in transverse cross-section.

27. The method according to claim 26, wherein the outer member hub includes an outer peripheral surface, the outer peripheral surface of the outer member hub including a lower portion and an upper portion, the gripping of the elongated housing comprising gripping the elongated housing while the lower portion of the outer peripheral surface of the outer member hub is positioned in the U-shaped portion of the elongated housing.