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Hub assembly

A technology of assembly and needle seat, which is applied in the direction of needles, guide needles, body balance valves, etc., and can solve problems such as blood leakage

Active Publication Date: 2020-10-13
NIPRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technology of Patent Document 2, since the vent groove is interposed between the partition wall and the inner surface of the catheter adapter, the fluid flows toward the base end side of the partition wall, so there is a possibility that in addition to air, blood also flows to the base end side of the partition wall. Danger of end-to-side leakage
In addition, in the technology of Patent Document 3, the blocking mechanism part arranged on the base end side of the hemostatic valve 24 can allow air to flow and block the flow of blood. Danger of end-to-side leakage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075]

[0076] figure 1 and figure 2 The outer needle unit 12 in the indwelling needle assembly provided with the hub assembly 10 as an embodiment of the present invention is shown. figure 1 (a) is a perspective view of the outer needle unit 12, figure 1 (b) is an enlarged view in which the perspective view of the hub assembly 10 is particularly enlarged. figure 2 It is a cross-sectional view of the outer needle unit 12 viewed from a direction perpendicular to the axial direction. It should be noted that, in this specification, the axial direction refers to the length direction of the fluid passage formed by the outer needle unit 12, which is figure 2 in the left-right direction. In addition, the tip side refers to figure 2 In the left side, the proximal side refers to the figure 2 on the right side of the .

[0077] exist figure 1 In the shown outer needle unit 12, it becomes the following structure: the base end of a cylindrical clamping tube (clamping tube) ...

Embodiment 2

[0112] Next, Example 2 of the present invention will be described. In this embodiment, an example in which the opening of the flow path from the flow path of the liquid in the hub assembly to the air passage leading to the filter is opened on the distal side as compared with the first embodiment will be described. In Example 1, in the communication hole 16b, the vent groove 16g, which is a ventilating path for air and blood to the filter 25, opens from immediately in front of the distal end surface of the disk valve 20. This is to more reliably close the vent groove 16g when the plunger 22 pushes open the slit 20c of the disk valve 20 .

[0113] However, in the case where the plunger 22 pushes open the slit 20 c of the disc valve 20 , it is not necessarily necessary to completely block the vent groove 16 g by the disc valve 20 . In addition, the ventilation groove 16g may be surrounded without being in direct contact with the ventilation groove 16g. In addition, if the defor...

Embodiment 3

[0121]

[0122] Figure 11 and Figure 12 An outer needle unit 42 including an indwelling needle assembly as the hub assembly 40 according to the third embodiment of the present invention is shown. Figure 11 (a) is a perspective view of the outer needle unit 42, Figure 11 (b) is an enlarged view in which the perspective view of the hub assembly 40 is particularly enlarged. Figure 12 It is a cross-sectional view of the outer needle unit 42 viewed from a direction perpendicular to the axial direction. Figure 11 The cylindrical clamp tube 13, the outer needle 14, and the outer needle base 14a in the illustrated outer needle unit 42 are the same as those described in Embodiment 1, and therefore description thereof will be omitted here.

[0123] Such as Figure 12 As shown, the schematic shape of the hub assembly 40 is formed by inserting the guide connector 39 as an example of the hub main body into the base end side of the connector cover 46 as an example of the hub hou...

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PUM

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Abstract

The objective of the present invention is to obtain a hub assembly with which blood flashback can be verified more reliably, and with which reliability is improved by preventing the inflow of blood from a separating wall to a base end side. This hub assembly is provided with a hub body (9) connected to a tube from an external appliance, a hub outer casing (16) which is coupled to the hub body (9)and forms a liquid passage, a slitted separating wall (20) disposed in the liquid passage in the hub outer casing (16), a filter (25) disposed on the living body-side of the separating wall (20) to allow the passage of gas and regulate the passage of liquid, and a ventilation passage (16h) which provides communication between the liquid passage and the outside of the hub outer casing (16) by way of the filter (25), wherein an end portion of the ventilation passage (16h) on the separating wall (20) side of an opening portion facing the liquid passage is provided in a location at most 10 mm toward the distal end side relative to the distal end of the separating wall (20).

Description

technical field [0001] The present invention relates to a hub assembly used for puncturing a blood vessel or the like during infusion, blood transfusion, artificial dialysis, etc. in the medical field. Background technique [0002] Conventionally, a hub assembly having a partition wall with a slit is known as a type of medical device used for infusion, blood collection, hemodialysis, and the like. As a technology related to them, the partition wall is formed in a disk shape, an annular groove extending in the circumferential direction is formed on the partition wall, a slit is formed at a central portion located on the inner periphery than the annular groove, and On the one hand, technologies such as forming a retaining portion that enters into an annular groove at an axial tip end of a plunger guide on the partition wall side or at an axial tip end of a plunger on the partition wall side are known (for example, refer to Patent Document 1). [0003] In such a hub assembly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/158A61M5/165A61M25/06A61M39/06A61M39/26
CPCA61M39/06A61M5/165A61M39/26A61M5/158A61M39/0693A61M25/0097A61M25/0606A61M5/385
Inventor 中神裕之阪本慎吾秋本春男
Owner NIPRO CORP