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Medical equipment

A technology of fixer and injection needle, which is applied in the field of medical equipment, can solve the problems of blood spillage, pollution of sleeping clothes or bed quilt, cover separation, etc., and achieve the effect of aggravating pain

Inactive Publication Date: 2008-02-27
ENOMOTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hose may be unplugged and the cover may be detached
These accidents will cause blood to spill through the external injection needle or butterfly needle, contaminating sleepwear or bedding
If you leave the patient for a long time without noticing these, you will face the risk of death due to excessive blood loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 2 example

[0117] Second Embodiment (First Aspect of the Invention)

[0118] Fig. 2 is a schematic sectional view of the indwelling injection needle of the second embodiment. The second embodiment is an improvement of the cylindrical valve 32 ′ in the first embodiment. The opening at the lower end of the cylindrical valve 32 ′ is compressed from both sides to form a butt valve slit 329 in a flat shape. The butt valve slit 329 can be molded with a relatively simple injection mold, such as the cylindrical valve 32 ′ molded with flexible and elastic resin or rubber, so that economical production of the cylindrical valve slit 329 with the butt valve slit 329 can be realized. Valve 32'.

[0119] According to the indwelling injection needle (the external injection needle of the catheter) in the first embodiment and the second embodiment in the first aspect of the present invention, the indwelling injection needle includes a one-way valve, so that blood can be effectively prevented from flowin...

no. 3 example

[0120] Fig. 39 is a schematic diagram of an improved indwelling injection needle according to the second embodiment of the first aspect of the present invention. A disc valve 36 with a valve slit 323 is located adjacent to the larger diameter opening of the dense cup 33 . One end of the conduit 37 is in contact with the disc valve 36 . The protruding portion 38a of the injection needle catheter 38 is inserted into the catheter 37 . The injection needle guide 38 is guided by the guide guide 37 and can move along the axis of the hub 11 . A spring 39 can detach the needle guide 38 from the disc valve 36 . When inserting the indwelling injection needle with the internal injection needle and restraining the pulling force of the spring, the injection needle conduit 38 moves toward the disc valve 36, the end 38b of the injection needle conduit 38 pushes the disc valve 36, and the disc valve 36 opens (see Figure 39(b) for details. ) and 39(d)). On the other hand, when the inner in...

no. 4 example

[0135] Fourth Embodiment (First Aspect of the Invention)

[0136] Figure 6 depicts another embodiment (fourth embodiment) of the one-way valve housed in the inner needle hub. The one-way valve 3 "comprises a funnel-shaped valve holder 34, which is liquid-tightly or air-tightly engaged with a locking step 44 formed on the inner peripheral surface of the hub 43, and a valve body 35 mounted on the valve holder. On and fixed by the outer peripheral surface of the small diameter tube 342 of the device 34, the valve body 35 is made of a soft and elastic material.

[0137] The opening of the valve body 35 has a circumferential thickness T so that it can be compressed between the conical surface 45 formed on the inner circumferential surface of the hub 43 and tapered downward and the outer surface of the valve holder 34 . There is a valve slit at the bottom of the valve body 35, which is usually blocked due to flexibility and elasticity so that liquid cannot flow through.

[0138] T...

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PUM

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Abstract

A first object of the invention is to provide a medical device capable of effectively preventing backwards flow of blood. A first aspect of the invention is a medical device including a check valve therein, the check valve including: a valve holder that has a tapered pipe, and a small diameter pipe connecting to a small diameter opening of the tapered pipe and extending outwards, a larger diameter opening of the tapered pipe being fluid-tightly fitted to an inner surface of a medical device; and a flexible valve body that is fitted to an outer peripheral surface of the small diameter pipe of the valve holder, and has a slit that is opened by fluid pressure from a large diameter opening side of the tapered pipe, or by a lateral pressure, but closed by a fluid pressure from a small diameter pipe side.

Description

technical field [0001] The present invention relates to medical devices for use in humans and animals, in particular catheter external needles (indwelling needles), internal needles, stoppers, butterfly needles, access tubes and side branches. Background technique [0002] First prior art (catheter external injection needle, internal injection needle) [0003] Fig. 30 is an assembly diagram of a traditional catheter structure. This catheter includes an outer injection needle and an inner injection needle. The catheter external injection needle 1 includes: a cylindrical hub 11 made of transparent resin; an injection needle 12 installed in the hub 11 and connected to one end thereof, the injection needle 12 is made of soft resin; A dense cup 33 is formed which fits inside the hub 11 and keeps the mating connection between the hub 11 and the injection needle 12 air and liquid tight. [0004] The catheter is inserted into the patient's skin in the following steps: The injecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M39/22A61M5/00A61M5/14A61M25/00A61M25/06A61M25/18A61M39/06A61M39/24F16K15/14
CPCA61M2039/242A61M39/0606A61M25/0606A61M39/24A61M25/0075A61M5/1408A61M2039/2426F16K15/147A61M2039/062A61M25/0693
Inventor 榎本信雄宫城典雄大神田高贵细田光司山田和夫
Owner ENOMOTO