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US 11,684,756 B2Granted
Catheter assembly
AssigneeTerumo Kabushiki Kaisha
InventorMasahiro Ishida
Life of this patent
Estimating the term…
Abstract
A catheter assembly includes a first assembly including a catheter and a catheter hub, a second assembly including an inner needle and a housing, and a catheter operating member. The catheter assembly also includes a separation restricting mechanism separate from the housing. The separation restricting mechanism restricts separation of the first assembly and the catheter operating member in an inserted state in which the inner needle is inserted in the catheter, and allows the separation of the first assembly and the catheter operating member in a non-inserted state in which the inner needle is separated from the catheter.
Claims6
A catheter assembly comprising:
- a first assembly comprising:
- a catheter, and
- a catheter hub that fixes and holds the catheter;
- a second assembly comprising:
- an inner needle removably inserted in the catheter and the catheter hub, and
- a needle hub that fixes and holds the inner needle;
- and
- a catheter operating member that controls relative movement of the first assembly with respect to the second assembly in an axial direction of the inner needle, the catheter operating member comprising:
- a connecting unit on a proximal side of the catheter hub, the connecting unit including a distal-most end face, a proximal-most end face, and an engagement hole penetrating from the distal-most end face to the proximal-most end face, wherein the inner needle is slidably inserted in the engagement hole and in direct contact with the connecting unit, and
- an operating projection positioned away from the connecting unit at a predetermined interval in the axial direction of the inner needle,
- wherein, when the inner needle is in an inserted state in which the inner needle is inserted in the catheter hub and the engagement hole, a portion of a proximal-most end face of the operating projection contacts a portion of a distal-most end face of the catheter hub and a portion of the distal-most end face of the connecting unit contacts a portion of a proximal-most end face of the catheter hub,
- wherein, when the inner needle is in a non-inserted state in which the inner needle is separated from the catheter hub and positioned entirely outside of the engagement hole, a distal end of the inner needle is exposed, and
- wherein (i) when the inner needle is in the inserted state, the connecting unit allows movement of the first assembly in the axial direction but restricts separation of the first assembly from the catheter operating member, and (ii) when the inner needle is in the non-inserted state, the connecting unit allows separation of the first assembly from the catheter operating member.
10 more elements
A method of using a catheter assembly, the method comprising:
- providing a catheter assembly comprising:
- a first assembly comprising:
- a catheter, and
- a catheter hub that fixes and holds the catheter;
- a second assembly comprising:
- an inner needle removably inserted in the catheter and the catheter hub, and
- a needle hub that fixes and holds the inner needle;
- and
- a catheter operating member that controls relative movement of the first assembly with respect to the second assembly in an axial direction of the inner needle, the catheter operating member comprising:
- a connecting unit on a proximal side of the catheter hub, the connecting unit including a distal-most end face, a proximal-most end face, and an engagement hole penetrating from the distal-most end face to the proximal-most end face, wherein the inner needle is slidably inserted in the engagement hole and in direct contact with the connecting unit, and
- an operating projection positioned away from the connecting unit at a predetermined interval in the axial direction of the inner needle,
- wherein, when the inner needle is in an inserted state in which the inner needle is inserted in the catheter hub and the engagement hole, a portion of a proximal-most end face of the operating projection contacts a portion of a distal-most end face of the catheter hub and a portion of the distal-most end face of the connecting unit contacts a portion of a proximal-most end face of the catheter hub,
- wherein, when the inner needle is in a non-inserted state in which the inner needle is separated from the catheter hub and positioned entirely outside of the engagement hole, a distal end of the inner needle is exposed,
- placing the inner needle in the inserted state in which the connecting unit allows movement of the first assembly in the axial direction but restricts separation of the first assembly from the catheter operating member;
- and
- placing the inner needle in the non-inserted state in which the connecting unit allows separation of the first assembly from the catheter operating member.
13 more elements
Dependencies are inferred from the claim text.