CN111714138A

Movatterモバイル変換

Info

Publication number: CN111714138A
Application number: CN202010607071.3A
Authority: CN
Inventors: 佟强; 张红侠; 马琪
Original assignee: Weihai Weigao Blood Collection Consumables Co ltd
Current assignee: Weihai Weigao Blood Collection Consumables Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-29

Abstract

The invention relates to an arterial blood-gas needle. The technical scheme is as follows: the piston comprises an outer sleeve, a core rod, a piston, an air filter and an injection needle, wherein the core rod, the piston, the air filter and the injection needle are arranged on the outer sleeve; the air filter is arranged in the piston and close to the opening. Through being provided with novel piston structure, place the piston in air cleaner in, set up the opening part slope of exhaust passage, can directly touch air cleaner's technical problem when having avoided blood to advance blood.

Description

Arterial blood-gas needle

Technical Field

The invention relates to the technical field of medical instruments, in particular to an arterial blood-gas needle.

Background

In clinical work, the arterial blood gas analysis is an effective operation commonly used for clinical diagnosis and rescue of patients, and the arterial blood sample collection method has important influence on the blood gas analysis result.

Current arterial blood gas needle, during the use, air cleaner installs in piston centre bore department, just to drawing blood mouthful department, and when arterial blood arrived to predetermine position contact air cleaner, air cleaner seals under the blood effect to reach the purpose of isolated air, influence arterial blood gas testing result in order to avoid air contact arterial blood. The problem that the blood entering amount of the arterial blood is small and the blood cannot reach the preset position easily occurs in the process of collecting the arterial blood is found through analysis. The collection of arterial blood sample and blood gas analysis of severe patients can not be completed in the first time, which is not favorable for disease judgment and delays treatment.

Disclosure of Invention

The invention mainly aims to provide an arterial blood needle, and aims to solve the technical problems that when arterial blood is extracted, the arterial blood is easy to splash on an air filter and stops flowing when the air filter on the existing arterial blood needle is not arranged properly.

The invention provides an arterial blood gas needle, which comprises an outer sleeve, and a core bar, a piston, an air filter and an injection needle which are arranged on the outer sleeve, wherein the outer sleeve is in a cylindrical design, the core bar is in a cylindrical design, the top of the core bar is provided with a push-pull head, the push-pull head extends out of the top end of the outer sleeve, the push-pull head can control the core bar to axially move in the outer sleeve, the bottom of the core bar is provided with a conical plug, and the plug is arranged on the top of the piston;

the piston is in a columnar hollow design, is arranged in the outer sleeve and can move up and down in the outer sleeve; a bayonet is arranged at the top of the piston, and the bayonet clamps the plug so that the piston can axially move in the outer sleeve along with the core rod;

the lower end of the piston is in a circular truncated cone shape, a channel is arranged along the circular truncated cone-shaped side surface of the piston and is connected with the bottom surface of the piston, an opening is arranged at the joint of the channel and the bottom surface of the piston, the opening and the channel form an included angle of 45 degrees in an axial direction and are connected with the bottom surface of the piston, and the opening is communicated with the hollow part in the piston; the air filter is arranged in the piston and close to the opening;

the bottom of the outer sleeve is provided with an installation head, and the injection needle is installed on the installation head.

Furthermore, four channels are symmetrically arranged on the circular truncated cone-shaped side surface of the piston, and openings are formed in the joints of the four channels and the bottom surface of the piston.

Further, the sectional area of the opening is 3.75mm²。

Furthermore, the outer side wall of the outer sleeve is provided with milliliter scales, and the accurate value of the milliliter scales is 0.1 milliliter.

According to the arterial blood gas needle provided by the invention, the air filter is arranged in the piston through the novel piston structure, the opening of the exhaust channel is obliquely formed, and the technical problem that blood can directly touch the air filter when entering blood is solved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the construction of the piston of the present invention;

fig. 3 is a schematic structural view of a half-sectional view of the piston of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-3, the arterial blood gas needle provided by the invention comprises anouter sleeve 3, and acore bar 5, apiston 2, an air filter 23 and aninjection needle 1 which are arranged on theouter sleeve 3, wherein theouter sleeve 3 is designed in a syringe shape, thecore bar 5 is designed in a columnar shape, a push-pull head 4 is arranged at the top of thecore bar 5, the push-pull head 4 extends out of the top end of theouter sleeve 3, the push-pull head 4 can control thecore bar 5 to axially move in theouter sleeve 3, a tapered plug is arranged at the bottom of thecore bar 5, and the plug is arranged at the top of thepiston 2;

thepiston 2 is in a columnar hollow design, and thepiston 2 is arranged in theouter sleeve 3 and can move up and down in theouter sleeve 3; a bayonet is arranged at the top of thepiston 2, and the bayonet clamps the plug so that thepiston 2 can axially move in theouter sleeve 3 along with thecore rod 5;

thepiston 2 is hollow, the lower end of thepiston 2 is designed in a circular truncated cone shape, a channel 21 is formed along the circular truncated cone-shaped side surface of thepiston 2, the channel 21 is connected with the bottom surface of thepiston 2, anopening 22 is formed at the joint of the channel 21 and the bottom surface of thepiston 2, theopening 22 and the channel 21 are connected with the bottom surface of thepiston 2 in an axial inclined included angle of 45 degrees, and the opening 22 is communicated with the hollow part in thepiston 2; the air filter 23 is arranged in thepiston 2 close to the opening 22;

the bottom of theouter sleeve 3 is provided with an installation head, and theinjection needle 1 is installed on the installation head.

The four channels 21 are symmetrically arranged on the circular truncated cone-shaped side surface of thepiston 2, andopenings 22 are formed at the joints of the four channels and the bottom surface of thepiston 2.

The cross section of theopening 22 is 3.75mm²。

Be provided with the milliliter scale on the 3 lateral walls of overcoat, the accurate value of milliliter scale is 0.1 milliliter.

According to the novel arterial blood needle, the air filter 23 is arranged inside thepiston 2, so that the air filter 23 is prevented from being exposed outside, and on the basis of ensuring good exhaust performance, blood is prevented from directly splashing to the air filter 23 after the arterial needle punctures an artery, so that the air filter 23 is closed and cannot exhaust, and the problems of no blood inlet and insufficient blood sampling are solved. Four independent vent channels 21 are arranged at the bottom of thepiston 2, compared with the existing arterial blood needle channels 21, the four vent channels are increased, so that better air exhaust performance is ensured,openings 22 with axial planes inclined at 45 degrees are respectively arranged at the joints with the ground, and when arterial blood splashes into theouter sleeve 3 during blood inflow, the inclined design of theopenings 22 directly prevents the arterial blood from splashing on an air filter 23 in thepiston 2. The opening 22 with the axial plane inclined at an angle of 45 degrees effectively prevents the arterial blood from splashing on the air filter 23 in thepiston 2 when being sprayed into thejacket 3. in the invention, the sectional area of theopening 22 is 3.75mm²The total cross-sectional area of the fouropenings 22 is 15mm²Compared with the existing arterial blood-gas needle with the diameter of 2.5mm²The area of the air outlet is increased by 6 times, and the air outlet efficiency is greatly improved.

It should be noted that, in the present invention, the passages 21 at the bottom of thepiston 2 are provided with, but not limited to, four.

Be provided with the milliliter scale on theovercoat 3 lateral wall, the accurate value is 0.1 milliliter, according to the required blood extraction milliliter value when using, the push-and-pull head 4 at twitchcore bar 5 top,core bar 5drives piston 2 of connection and moves to corresponding scale value department, puncture throughsyringe needle 1 and wait to extract the person's artery, blood is in automatic enteringovercoat 3 under the arterial pressure effect, the air inovercoat 3 is discharged through air cleaner 23 in thepiston 2, blood draws appointed milliliter numerical value after, contact air cleaner 23 in thepiston 2, because air cleaner 23 has the ability of meeting water confined of ventilating, air cleaner 23 is automatic seals the opening 22 ofpiston 2 department, accomplish the blood extraction process.

In summary, the structure of the arterialblood needle piston 2 provided by the invention has the advantages that the air filter is arranged in thepiston 2 through the novel piston structure, theopening 22 of the channel 21 is obliquely formed, and the technical problem that the air filter 23 can be directly touched when blood enters is avoided.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An arterial blood gas needle is characterized by comprising an outer sleeve, and a core bar, a piston, an air filter and an injection needle which are arranged on the outer sleeve, wherein the outer sleeve is in a cylindrical design, the core bar is in a cylindrical design, the top of the core bar is provided with a push-pull head, the push-pull head extends out of the top end of the outer sleeve, the push-pull head can control the core bar to axially move in the outer sleeve, the bottom of the core bar is provided with a conical plug, and the plug is arranged on the top of the piston;

2. The arterial blood needle of claim 1 wherein there are four channels symmetrically disposed on the frustoconical side of the piston, and each channel has an opening at the junction with the bottom surface of the piston.

3. The arterial needle of claim 2 wherein said open cross-sectional area is 3.75mm²。

4. The arterial blood needle of claim 1 wherein the outer wall of said outer sleeve is provided with a ml scale, said ml scale having an accuracy of 0.1 ml.