CN220293601U - Blood-qi needle piston and blood-qi needle - Google Patents

Abstract

The utility model discloses a blood-gas needle piston and a blood-gas needle, which are characterized by comprising a piston body and a piston cavity, wherein the piston cavity is of a hollow communication design, the upper end of the piston body is provided with a piston head, the side surface of the piston head is provided with an exhaust channel, the exhaust channel is communicated with the piston cavity to the bottom surface of the piston, the piston cavity is provided with an air filter, the bottom surface of the piston is provided with an opening, and a step-shaped structure is arranged between the opening and the piston cavity.

Description

Blood-qi needle piston and blood-qi needle

Technical Field

The utility model relates to the field of medical equipment, in particular to a blood-qi needle piston and a blood-qi needle.

Background

The human arterial blood sample collector (blood gas needle) is used for collecting arterial blood and is mainly used for blood gas analysis. At present, arterial blood collection is mainly preset, namely, a collector is preset to a required scale, arterial blood enters a blood gas needle under arterial pressure after arterial puncture or arterial catheter connection, air in the blood gas needle is discharged, and arterial blood is automatically filled with a required volume.

The novel femoral artery blood sampling injector for blood gas analysis has the advantages that the piston of the novel femoral artery blood sampling injector for blood gas analysis in the existing market has a structure as a whole, the exhaust hole is smaller, the exhaust speed is low, blood sampling failure is easy to occur, or the collected blood sample contains bubbles, so that the detection result is influenced, and the clinical judgment is influenced; an incomplete sealing phenomenon can occur, and a small amount of blood flows back to the core rod through the inner cavity of the piston. Arterial blood sample collection and blood gas analysis of severe patients cannot be completed in the first time, so that judgment of the illness state is not facilitated, and treatment is delayed.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides the blood gas needle piston which is high in exhaust speed, good in sealing effect, free of bubbles in collected blood samples and free of backflow of blood.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a blood gas needle piston, includes piston body and piston inner chamber, the piston inner chamber is cavity intercommunication design, piston body upper end is equipped with the piston head, exhaust passage has been seted up to piston head side, exhaust passage intercommunication piston inner chamber to piston bottom surface, the piston inner chamber is equipped with air cleaner, the opening has been seted up to the piston bottom surface, be equipped with step-like structure in the middle of opening and the piston inner chamber.

The further preferable technical scheme is that the piston head is composed of a hemisphere and a cylinder, and four exhaust channels are formed in the side face of the cylinder.

The further preferable technical scheme is that a cross rib structure is arranged between the exhaust channel and the inner cavity of the piston.

The further preferable technical scheme is that the air filter is matched with the inner cavity of the piston and is arranged at the upper part of the inner cavity of the piston.

Further preferable technical scheme is that the exhaust channel is of a horn-shaped structure, and a hole with a large opening of the exhaust channel is perpendicular to a hole with a small opening, so that a transverse exhaust groove and a longitudinal exhaust groove are formed.

The utility model provides a blood gas needle, includes blood gas needle piston, includes sleeve, core bar and syringe needle, the one end of core bar is equipped with T form pole head, T form pole head stretches into the piston inner chamber, T form pole head is laminated with step form structure, the horizontal end of T form pole head is equipped with the slot, blood gas needle piston can be along with the core bar is in sleeve axial activity.

The further preferable technical scheme is that scale marks are arranged outside the sleeve.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the lateral surface of the piston head is provided with the plurality of horn-shaped exhaust channels, the exhaust channels form the transverse exhaust grooves and the longitudinal exhaust grooves, meanwhile, the rod is in clearance fit with the sleeve, a second exhaust passage is formed between the rod and the sleeve, air is discharged through the exhaust channels and the second exhaust passage, the exhaust speed is high, the exhaust efficiency is high, the blood sampling success rate is high, the collected blood sample detection result is accurate, the collected blood sample does not contain bubbles, meanwhile, the air filter is arranged at the upper part of the inner cavity of the piston and is attached to the inner cavity of the piston, the blood can be quickly contacted with the air filter, and the air filter is ventilated and is not in liquid communication, so that the blood is prevented from flowing into the inner cavity of the piston, and the tightness of the inner cavity is improved.

Drawings

FIG. 1 is a cross-sectional view of a blood needle piston of the present utility model;

FIG. 2 is a bottom view of the blood gas needle piston of the present utility model with the air filter removed;

FIG. 3 is a schematic view of the blood-gas needle structure of the present utility model;

FIG. 4 is a front view of a blood gas needle piston of the present utility model;

in the figure: 1. a piston body; 2. a piston inner chamber; 3. a piston head; 4. an exhaust passage; 5. an air filter; 6. an opening; 7. a transverse exhaust slot; 8. a longitudinal exhaust slot; 9. a sleeve; 10. a core bar; 11. a needle; a t-bar head; 13. a cross rib structure.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Example 1

As shown in fig. 1-4, a blood gas needle piston comprises a piston body 1 and a piston inner cavity 2, wherein the piston inner cavity 2 is in a hollow communication design, a piston head 3 is arranged at the upper end of the piston body 1, an exhaust channel 4 is formed in the side face of the piston head 3, the piston head 3 comprises a hemisphere and a cylinder, four exhaust channels 4 are formed in the side face of the cylinder, the exhaust channels 4 are in a horn-shaped structure, a hole with a large opening of the exhaust channel 4 is perpendicular to a hole with a small opening, and a transverse exhaust groove 7 and a longitudinal exhaust groove 8 are formed. Make gas displacement big, exhaust speed is fast, exhaust passage 4 intercommunication 2 chambeies in the piston to the piston bottom surface, be equipped with cross muscle structure 13 between exhaust passage 4 and the piston inner chamber 2, make overall structure strengthen, piston inner chamber 2 is equipped with air cleaner 5, specificly, air cleaner 5 and the laminating of piston inner chamber 2, and fixedly set up in the upper portion of piston inner chamber 2, prevent blood entering piston inner chamber, promote the leakproofness of piston inner chamber, opening 6 has been seted up to the piston bottom surface, be equipped with step-like structure in the middle of opening 6 and the piston inner chamber 2, conveniently block the T form pole head 12 of core bar 10.

The blood and gas needle comprises a blood and gas needle piston, a sleeve 9, a core rod 10 and a needle head 11, wherein one end of the core rod 10 is provided with a T-shaped rod head 12, the T-shaped rod head 12 extends into a piston inner cavity 2, the T-shaped rod head 12 is matched with a step-shaped structure, the transverse end of the T-shaped rod head 12 is provided with a groove, and the blood and gas needle piston can axially move along with the core rod 10 in the sleeve 12. Graduation marks are arranged outside the sleeve 12.

The working process of the utility model is as follows: the transverse exhaust groove 7 and the longitudinal exhaust groove 8 are communicated to form an exhaust channel 4, air enters the air filter 5 through the exhaust channel 4, the air filter isolates blood from the outside, air enters the exhaust cavity 2, the core bar 10 is in clearance fit with the sleeve 9 when being discharged from the opening 6, a second exhaust passage is formed between the core bar and the sleeve, and the air is discharged through the second exhaust passage. In the clinical use process, when the core rod 10 is pulled to drive the blood needle piston to a preset scale, the T-shaped rod head of the core rod is tightly attached to the axial inner wall of the piston. The transverse exhaust grooves 7 and the longitudinal exhaust grooves 8 of the exhaust channel are communicated, so that the exhaust channel which is communicated longitudinally and longitudinally is formed, and the exhaust function is realized.

According to the utility model, the lateral surface of the piston head is provided with the plurality of horn-shaped exhaust channels, the exhaust channels form the transverse exhaust grooves and the longitudinal exhaust grooves, meanwhile, the rod is in clearance fit with the sleeve, a second exhaust passage is formed between the rod and the sleeve, air is discharged through the exhaust channels and the second exhaust passage, the exhaust speed is high, the exhaust efficiency is high, the blood sampling success rate is high, the collected blood sample detection result is accurate, the collected blood sample does not contain bubbles, meanwhile, the air filter is arranged at the upper part of the inner cavity of the piston and is attached to the inner cavity of the piston, the blood can be quickly contacted with the air filter, and the air filter is ventilated and is not in liquid communication, so that the blood is prevented from flowing into the inner cavity of the piston, and the tightness of the inner cavity is improved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (7)

1. The utility model provides a blood gas needle piston, its characterized in that, includes piston body and piston inner chamber, the piston inner chamber is cavity intercommunication design, piston body upper end is equipped with the piston head, exhaust passage has been seted up to piston head side, exhaust passage intercommunication piston inner chamber to piston bottom surface, the piston inner chamber is equipped with air cleaner, the opening has been seted up to the piston bottom surface, be equipped with step-like structure in the middle of opening and the piston inner chamber.

2. A blood gas needle piston according to claim 1 wherein the piston head is comprised of a hemisphere and a cylinder, the cylinder side being provided with four vent passages.

3. A blood gas needle piston as claimed in claim 2 wherein a cross rib structure is provided between the vent passage and the piston bore.

4. A blood gas needle piston according to claim 1 wherein the air filter is attached to the interior of the piston and is disposed in the upper portion of the interior of the piston.

5. The blood gas needle piston of claim 1 wherein said vent passage is of a trumpet-like configuration, and wherein a large opening of said vent passage is perpendicular to a small opening of said vent passage to form a transverse vent slot and a longitudinal vent slot.

6. A blood gas needle comprising the blood gas needle piston according to any one of claims 1-5, characterized by comprising a sleeve, a core rod and a needle head, wherein one end of the core rod is provided with a T-shaped rod head, the T-shaped rod head stretches into an inner cavity of the piston, the T-shaped rod head is adapted to a stepped structure, a groove is formed in the transverse end of the T-shaped rod head, and the blood gas needle piston can axially move in the sleeve along with the core rod.

7. A blood gas needle according to claim 6 wherein the sleeve is provided with graduation marks.