CN107115109B - Protection type arterial puncture detaining needle - Google Patents

Abstract

A protective indwelling needle for arterial puncture, including an indwelling needle overtube, a needle core and a needle seat. The indwelling needle overtube is provided with a pressure-measuring interface, and inside the indwelling needle overtube, on the right side of the pressure-measuring interface is a An annular stopper; the needle core is covered with a rubber stopper and a needle point protection cover, the rubber stopper can prevent blood from being sprayed out, and the needle point protection cover can automatically trigger protection, effectively eliminating potential safety hazards.

Description

Protected arterial puncture catheter

technical field

The invention relates to the field of medical devices, in particular to a protective arterial puncture indwelling needle.

Background technique

For critical surgical patients or intensive care patients who need real-time monitoring of blood pressure, invasive blood pressure monitoring is usually used, that is, an arterial puncture needle is inserted into the artery, and then connected to an arterial manometry device. Due to high arterial blood pressure, blood is often ejected from the needle tube or hydraulic interface during puncture, causing contamination and increasing the chance of iatrogenic disease transmission. In addition, when the needle core withdraws from the needle tube, the needle point has certain dangers, and if the needle point is handled separately, time and energy will be wasted.

Contents of the invention

In order to solve the defects in the above-mentioned prior art, the present invention provides a protective arterial puncture indwelling needle, which can prevent blood from ejecting, and at the same time, when the needle core is pulled out, the needle tip protective cover automatically covers the needle tip, eliminating potential safety hazards.

The technical scheme adopted in the present invention: a protective arterial puncture indwelling needle, including an indwelling needle overtube, a needle core and a needle seat, the indwelling needle overtube is provided with a pressure measuring interface, inside the indwelling needle overtube, measuring The right side of the crimping interface is provided with an annular stopper; the needle core is covered with a rubber stopper and a needle point protective sleeve; the side of the needle core close to the needle point is provided with a wide body; the position of the rubber stopper is measured On the left side of the crimping port; the needle tip protection sleeve passes through the hollow part of the annular stopper; the needle tip protection sleeve includes a base and clamp feet; the base is provided with a hole for the needle core to pass through, and the wide body The width is greater than the diameter of the hole.

Preferably, the needle tip protection cover is composed of a base and two L-shaped clip feet, and the edges of the clip feet are provided with a bent portion to prevent the needle point from passing through.

Preferably, the pressure measuring interface is at an angle of 15 degrees with the outer cannula of the indwelling needle.

Preferably, the wide body is formed by partial punching of the needle core.

Beneficial effects of the present invention: the needle core is worn with a rubber stopper, and in the process of pulling out the needle core, the rubber stopper moves from the left side to the right side of the pressure measurement interface along with the needle core under the push of the wide body, and the pressure measurement interface is opened, Make the blood flow to the pressure measuring interface, during this period, the pressure measuring device can be connected in advance to prevent the blood from being ejected suddenly. When the rubber stopper moves to the blocking body, it cannot continue to move to the right. At this time, continue to draw the needle core outward. Under the action of pressure, the gap in the center of the rubber stopper expands to allow the wide body to pass through. Elastic, the slit in the center closes automatically to prevent blood from spilling. The needle tip protection cover is for one-time use. When the protection is not triggered, the needle tip protection cover is set in the hollow of the stopper. When the needle core is inserted, the width of the two clamping legs is larger than the diameter of the hollow part of the stopper. When the needle tip protection cover is not drawn out; when the needle tip is pulled out to the needle tip protection cover, the clip legs are clamped together under the action of elasticity, and the needle tip is clamped and protected in the bending part, and the needle tip is withdrawn from the indwelling needle outer sleeve together. Since the width of the wide body is greater than the diameter of the hole on the base of the needle tip protection cover, the needle tip cannot be pulled out from the bottom of the needle tip protection cover, and the needle tip cannot be pulled out from the top of the needle tip protection cover due to the double-bending structure at the pinch of the needle tip protection cover. Out, so this kind of protection is very reliable, and the material is very economical.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is a schematic structural view of the needle tip protection sleeve of the present invention;

Fig. 3 is a schematic structural view of the needle tip protection function of the present invention in a state in which it is not triggered;

Fig. 4 is a cross-sectional top view of the triggering state of the needle tip protection function of the present invention;

Fig. 5 is a cross-sectional left view of the triggering state of the needle tip protection function of the present invention;

Fig. 6 is a schematic structural diagram of the triggering state of the needle tip protection function of the present invention;

Fig. 7 is a top view of the present invention.

Detailed ways

As shown in Figure 1, a protective arterial puncture indwelling needle includes an indwelling needle overtube 1, a needle core 2 and a needle holder 3, and is characterized in that: the indwelling needle overtube 1 is provided with a pressure measuring interface 6, Inside the indwelling needle overtube 1, an annular stopper 7 is provided on the right side of the pressure measuring interface 6; the needle core 2 is covered with a rubber stopper 4 and a needle tip protection sleeve 5; the needle core 2 is close to the needle tip The side is provided with a wide body 8; the position of the rubber stopper 4 is on the left side of the pressure measuring interface 6; the needle tip protection cover 5 passes through the hollow part of the ring stopper 7; the needle tip protection cover includes a base 5.2 And clamp foot 5.1; The base is provided with a hole for the needle core 2 to pass through, and the width of the wide body 8 is greater than the diameter of the hole.

In this embodiment, the pressure measuring interface 6 is at an angle of 15 degrees with the indwelling needle outer tube 1; the wide body 8 is formed by partially punching the needle core 2 .

When in use, the artery is punctured with the needle core 2, and the blood enters the indwelling needle outer tube 1 and is hindered by the rubber stopper 4, so that it cannot flow out. Connect the pressure measuring device to the pressure measuring interface 6, then slowly pull out the needle core 2, and the rubber stopper 4 moves from left to right under the push of the wide body 8, so that the blood enters the pressure measuring interface 6, thereby preventing the blood from flowing through the pressure measuring interface. 6 spray out to cause pollution.

If the needle core 2 is not completely withdrawn from the indwelling needle outer sleeve 1, it will affect the pressure measurement results. After the needle core 2 is pulled out by the ordinary arterial puncture needle, there will be a safety hazard because the needle tip has no protection device. Therefore, we designed A needle point protective cover 5, as shown in Figure 2, is composed of a base 5.2 and two L-shaped clamp feet 5.1, the edge of the clamp foot 5.1 is provided with a bending part 5.3 to prevent the needle point from passing through, and its side is X-shaped , the needle tip protection sheath 5 is made of metal, and uses the elasticity of the metal sheet itself to trigger the protection action. When the protection is not triggered, that is, when the needle core 2 passes through the needle point protection cover 5, the width of the two clamping feet 5.1 of the needle point protection cover 5 after being stretched is greater than the diameter of the hollow part of the ring stopper 7, and the needle point protection cover 5 is arranged on At the hollow of the ring stopper 7, the needle point protection cover 5 will not be pulled out at this time; when the needle point is pulled out into the needle point protection cover 5, the clip feet 5.1 are clamped together under the action of elasticity, and the needle point is clamped and protected at the bending part Inside, exit the indwelling needle overtube together with the needle tip. Since the width of the wide body 8 is greater than the diameter of the hole on the base of the needle point protection cover 5.2, the needle point cannot be drawn out from the bottom of the needle point protection cover 5, and because the pinch 5.1 of the needle point protection cover 5 is provided with a double-bending structure, the needle point cannot be pulled out from the bottom of the needle point protection cover 5. The top of the needle tip protection sheath 5 comes out, that is to say, once the protection function of the needle tip protection sheath 5 is triggered, it will tightly wrap the needle tip, and the protection function will be automatically triggered as the needle core 2 is pulled out, which is simple, convenient and low in cost .

Claims (4)

1. a kind of protection type arterial puncture detaining needle, including remaining needle outer tube（1）, needle core（2）And needle stand（3）, described stays Set needle outer tube（1）The interior annular that is equipped with works as body（7）, the needle core（2）On be cased with needle tip protection sleeve（5）；The needle core（2） It is equipped with expanded letter close to the side of needle point（8）；The needle tip protection sleeve（5）From annular block body（7）Hollow space pass through；It is described Needle tip protection sleeve（5）Including pedestal（5.2）And pinch（5.1）, the pedestal（5.2）It is equipped with for needle core（2）It passes through Hole, the expanded letter（8）Width be more than the hole diameter；It is characterized in that：The annular block body（7）Left side be equipped with pressure measurement Interface（6）, the needle core（2）On be cased with rubber stopper（4）, the rubber stopper（4）Position in pressure measurement interface（6）Left side.

2. protection type arterial puncture detaining needle according to claim 1, it is characterised in that：The needle tip protection sleeve（5） By a pedestal（5.2）With the L-shaped pinch of two panels（5.1）Composition, pinch（5.1）Edge be equipped with prevent the bending that needle point is pierced by Portion（5.3）.

3. protection type arterial puncture detaining needle according to claim 1, it is characterised in that：The pressure measurement interface（6）With Remaining needle outer tube（1）At 15 degree of angles.

4. protection type arterial puncture detaining needle according to claim 1, it is characterised in that：The expanded letter（8）Using pair Needle core（2）The mode of local punching press is formed.