INDWELLING ASSEMBLY

• US 20150112266A1
• Filed: 12/26/2014
• Published: 04/23/2015
• Est. Priority Date: 03/26/2010
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: ISHIDA, Masahiro
• Granted Patent: US 9,186,483 B2
• Time in Patent Office: Days
• US Class Current: 604/165.02
• 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 at a distal end to puncture a blood vessel of a patient, an inner needle hub fixed to the proximal portion of the inner needle, a hollow elongated outer member in which the inner needle is positioned, with the hollow elongated member being movable in a distal direction relative to the inner needle after puncturing the patient'"'"'s blood vessel, an outer member hub fixed to the proximal portion of the hollow elongated outer member, an elongated contact member configured to contact an intermediate portion of the hollow elongated outer member, and an elongated movable member movable relative to the hollow elongated outer member and the outer member hub. The elongated movable member is connected to the inner needle hub so that the inner needle hub, the inner needle and the elongated movable member move together.

Claims

1. An indwelling assembly comprising:

an inner needle having a sharp needlepoint at a distal end to puncture a blood vessel of a patient when the indwelling assembly is moved toward the patient, the inner needle possessing a proximal portion;

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

a hollow elongated outer member in which the inner needle is positioned, the hollow elongated member being movable in a distal direction relative to the inner needle after puncturing the patient'"'"'s blood vessel with the sharp needlepoint to position the hollow elongated outer member at a desired position in the blood vessel, the hollow elongated outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow elongated outer member;

an elongated contact member configured to contact an intermediate portion of the hollow elongated outer member located between proximal and distal ends of the hollow elongated outer member when the indwelling assembly is moved toward the patient to puncture the blood vessel of the patient with the sharp needlepoint of the inner needle;

an elongated movable member that is movable relative to the hollow elongated outer member and the outer member hub, the elongated movable member being connected to the inner needle hub so that the inner needle hub, the inner needle and the elongated movable member move together, the elongated movable member projecting in the distal direction from the inner needle hub;

the elongated movable member being movable together with the inner needle hub and the inner needle in a proximal direction relative to the hollow elongated outer member and the outer member hub after the hollow elongated outer member is positioned in the patient'"'"'s blood vessel to remove the inner needle from the patient'"'"'s blood vessel while the hollow elongated outer member remains positioned in the patient'"'"'s blood vessel and to entirely remove the inner needle from the hollow elongated outer member;

at least a portion of the elongated movable member being U-shaped in transverse cross-section, and a portion of the inner needle axially overlapping the U-shaped portion of the elongated movable member; and

the portion of the inner needle that axially overlaps the U-shaped portion of the elongated movable member extending from the inner needle hub in the distal direction.

2. The indwelling assembly according to claim 1, wherein:

the hollow elongated outer member is an outer needle;

the outer member hub is an outer needle hub;

the elongated contact member is a pressing member connected to the outer needle hub, and the elongated movable member is a grip member.

3. The indwelling assembly according to claim 1, wherein the elongated movable member includes a plurality of spaced apart ribs grippable by a hand of a user to prevent the user'"'"'s hand from slipping along the elongated movable member.

4. The indwelling assembly according to claim 1, wherein the outer member hub axially overlaps with the U-shaped portion of the elongated movable member.

5. The indwelling assembly according to claim 1, wherein the inner needle possesses a distal-most end that projects distally beyond a distal-most end of the hollow elongated outer member.

6. The indwelling assembly according to claim 1, wherein the elongated movable member is U-shaped along its entire longitudinal extent.

7. The indwelling assembly according to claim 6, wherein the U-shaped elongated movable member includes a bottom plate and a groove formed in an upper surface of the bottom plate.

8. The indwelling assembly according to claim 1, wherein the proximal portion of the hollow elongated outer member is disposed in the elongated movable member.

9. An indwelling assembly comprising:

an inner needle having a sharp needlepoint at a distal end to puncture a blood vessel of a patient when the indwelling assembly is moved toward the patient, the inner needle possessing a proximal portion;

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

a hollow elongated outer member in which the inner needle is positioned, the hollow elongated member being movable in a distal direction relative to the inner needle after puncturing the patient'"'"'s blood vessel with the sharp needlepoint to position the hollow elongated outer member at a desired position in the blood vessel, the hollow elongated member possessing a distal end and a proximal end, the hollow elongated outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow elongated outer member;

an elongated contact member axially overlapping a part of the hollow elongated outer member that extends from the outer member hub toward the distal end of the hollow elongated movable member, the elongated contact member being configured to contact an intermediate portion of the hollow elongated outer member located between the proximal and distal ends of the hollow elongated outer member while moving the indwelling assembly toward the patient to puncture the patient'"'"'s blood vessel with the sharp needlepoint of the inner needle;

an elongated movable member that is movable relative to the hollow elongated outer member and the outer member hub, the elongated movable member being connected to the inner needle hub so that the inner needle hub, the inner needle and the elongated movable member move together, the elongated movable member projecting in the distal direction from the inner needle hub;

portions of the elongated movable member, the elongated contact member, the hollow elongated outer member and the inner needle axially overlapping one another;

the elongated movable member being movable together with the inner needle hub and the inner needle in a proximal direction relative to the hollow elongated outer member and the outer member hub after the hollow elongated outer member is positioned in the patient'"'"'s blood vessel to remove the inner needle from the patient'"'"'s blood vessel while the hollow elongated outer member remains positioned in the patient'"'"'s blood vessel and to entirely remove the inner needle from the hollow elongated outer member;

at least a portion of the elongated movable member being U-shaped in transverse cross-section so that the portion of the elongated movable member is open along one longitudinally extending side, the U-shaped portion of the elongated movable member axially overlapping a portion of the inner needle;

the U-shaped portion of the elongated movable member extending from the inner needle hub in the distal direction; and

the elongated contact member covering the longitudinally extending open side of the U-shaped portion of the elongated movable member so that the elongated movable member and the elongated contact member enclose a space in which the inner needle is positioned.

10. The indwelling assembly according to claim 9, wherein the elongated movable member includes a plurality of spaced apart ribs grippable by a hand of a user to prevent the user'"'"'s hand from slipping along the elongated movable member.

11. The indwelling assembly according to claim 9, wherein the outer member hub axially overlaps with the U-shaped portion of the elongated movable member.

12. The indwelling assembly according to claim 9, wherein the elongated movable member is U-shaped along its entire longitudinal extent.

13. The indwelling assembly according to claim 9, wherein the proximal portion of the hollow elongated outer member is disposed in the elongated movable member.

14. An indwelling assembly comprising:

a hollow inner needle having a sharp needlepoint at a distal end to puncture a blood vessel of a patient when the indwelling assembly is moved toward the patient, the hollow inner needle possessing an interior that opens to the sharp needlepoint at the distal end of the needle so that blood from the patient'"'"'s blood vessel flows into the interior of the inner needle after the sharp needlepoint punctures the patient'"'"'s blood vessel, the inner needle possessing a proximal portion;

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

a hollow elongated outer member in which the inner needle is positioned, the hollow elongated member being movable in a distal direction relative to the inner needle after puncturing the patient'"'"'s blood vessel with the sharp needlepoint to position the hollow elongated outer member at a desired position in the blood vessel, the hollow elongated outer member possessing a proximal portion;

an outer member hub fixed to the proximal portion of the hollow elongated outer member;

an elongated contact member configured to contact an intermediate portion of the hollow elongated outer member located between proximal and distal ends of the hollow elongated outer member when the indwelling assembly is moved toward the patient to puncture the blood vessel of the patient with the sharp needlepoint of the inner needle;

an elongated movable member that is movable relative to the hollow elongated outer member and the outer member hub, the elongated movable member being connected to the inner needle hub so that the inner needle hub, the inner needle and the elongated movable member move together, the elongated movable member projecting in the distal direction from the inner needle hub; and

the elongated movable member being movable together with the inner needle hub and the inner needle in a proximal direction relative to the hollow elongated outer member and the outer member hub after the hollow elongated outer member is positioned in the patient'"'"'s blood vessel to remove the inner needle from the patient'"'"'s blood vessel while the hollow elongated outer member remains positioned in the patient'"'"'s blood vessel and to entirely remove the inner needle from the hollow elongated outer member.

15. The indwelling assembly according to claim 14, wherein the elongated movable member includes a plurality of spaced apart ribs grippable by a hand of a user to prevent the user'"'"'s hand from slipping along the elongated movable member.

16. The indwelling assembly according to claim 14, wherein the outer member hub axially overlaps with a U-shaped portion of the elongated movable member.

17. The indwelling assembly according to claim 14, wherein the inner needle possesses a distal-most end that projects distally beyond a distal-most end of the hollow elongated outer member.

18. An indwelling assembly according to claim 14, wherein at least a portion of the elongated movable member is U-shaped, and a portion of the inner needle axially overlaps the U-shaped portion of the elongated movable member, the portion of the inner needle that axially overlaps the U-shaped portion of the elongated movable member extending from the inner needle hub in the distal direction.

19. The indwelling assembly according to claim 14, wherein the elongated movable member is U-shaped along its entire longitudinal extent.

20. The indwelling assembly according to claim 14, wherein the proximal portion of the hollow elongated outer member is disposed in the elongated movable member.