CN216602880U - Piston capable of realizing rapid exhaust of blood-gas needle and rapid exhaust blood-gas needle - Google Patents

Abstract

The utility model relates to a piston capable of realizing quick exhaust of a blood-gas needle and a quick exhaust blood-gas needle, and belongs to the technical field of medical instruments. The piston capable of realizing rapid exhaust of the blood gas needle comprises a piston body, wherein a ventilation port is formed in the bottom of the piston body, an exhaust port is formed in the top of the piston body, an exhaust inner cavity is formed in the middle of the piston body, and the ventilation port, the exhaust inner cavity and the exhaust port are communicated with an exhaust channel; the bottom of the exhaust port is provided with a transverse exhaust groove along the radial direction, the inner side surface of the exhaust port is provided with a longitudinal exhaust groove along the axial direction, and the transverse exhaust groove and the longitudinal exhaust groove are communicated to form a first exhaust passage. The utility model has high success rate of blood collection and accurate detection result of collected blood samples.

Description

Piston capable of realizing rapid exhaust of blood-gas needle and rapid exhaust blood-gas needle

Technical Field

The utility model relates to a piston capable of realizing quick exhaust of a blood-gas needle, and belongs to the technical field of medical instruments.

Background

A human artery blood sample collector, called blood-gas needle for short, is used for collecting artery blood and is mainly used for blood-gas analysis. At present, the collection of arterial blood is mainly of a preset type, namely, the collector is preset to a required scale, after arterial puncture or connection of an arterial catheter, arterial blood enters a blood-gas needle under arterial pressure and air in the blood-gas needle is discharged, and the arterial blood sample is automatically filled in a required volume. The preset type has the advantages over the drawing type that: can effectively prevent the generation of bubbles, and the detection result is inaccurate because the bubbles can bring great influence on the detection result, thereby influencing the clinical judgment of the state of an illness.

The prior art has the following technical defects:

the exhaust speed is slow, which easily causes blood sampling failure, or the collected blood sample contains air bubbles, which affects the detection result, thereby affecting clinical judgment.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the defects of the prior art are overcome, the piston capable of achieving quick exhaust of the blood-gas needle and the quick exhaust of the blood-gas needle are provided, the blood sampling success rate is high, and the collected blood sample detection result is accurate.

The piston capable of realizing rapid exhaust of the blood gas needle comprises a piston body, wherein the bottom of the piston body is provided with a ventilation port, the top of the piston body is provided with an exhaust port, the middle of the piston body is provided with an exhaust inner cavity, and the ventilation port, the exhaust inner cavity and the exhaust port are communicated with an exhaust channel;

the bottom of the exhaust port is provided with a transverse exhaust groove along the radial direction, the inner side surface of the exhaust port is provided with a longitudinal exhaust groove along the axial direction, and the transverse exhaust groove and the longitudinal exhaust groove are communicated to form a first exhaust passage.

Working process or working principle:

the piston capable of achieving rapid exhaust of the blood needle adopts a preset type, air in the blood needle can be rapidly exhausted through the ventilation port, the exhaust inner cavity and the exhaust port under arterial pressure, the exhaust efficiency is improved through the transverse exhaust groove and the longitudinal exhaust groove, the blood sampling success rate is improved, and the accuracy of a blood sampling detection result is ensured.

The transverse exhaust groove is communicated with the longitudinal exhaust groove, and gas firstly passes through the transverse exhaust groove and then enters the longitudinal exhaust groove, so that the gas is exhausted out of the piston.

Preferably, a plurality of lateral exhaust grooves and a plurality of longitudinal exhaust grooves are provided around the exhaust port.

Preferably, the ventilation opening, the exhaust lumen and the exhaust opening are on the same central axis.

Preferably, the piston body is made of a high polymer elastic material.

The utility model relates to a quick qi and blood exhausting needle, which comprises a piston and a core rod, wherein a sleeve is sleeved outside the piston and the core rod, an inverted T-shaped connector is arranged at the end part of the core rod, penetrates through an exhaust port and is arranged in an exhaust inner cavity; the T-shaped air vent plug is inserted into the air vent, and the air vent plug is not communicated with liquid; the core rod is in clearance fit with the sleeve. After the blood sample is collected, the air vent plug meets the liquid blood sample to realize self-sealing.

Working process or working principle:

the air passes through the exhaust plug, passes through the exhaust inner cavity, and the transverse exhaust groove and the longitudinal exhaust groove are communicated to form a first exhaust passage; the core rod and the sleeve are in clearance fit, a second air exhaust channel is formed in the clearance, and air is exhausted through the first air exhaust channel and the second air exhaust channel. In the clinical use, when the pull core bar drives the piston to preset scales, the inverted T-shaped transverse end surface of the core bar is tightly attached to the axial inner wall of the piston, no gap exists, and the transverse exhaust groove is communicated with the longitudinal exhaust groove, so that an exhaust channel which is communicated vertically and horizontally is formed, and the exhaust function is realized.

The exhaust channel is widened by the transverse exhaust groove and the longitudinal exhaust groove, the exhaust speed is higher, the exhaust efficiency is higher, the blood sampling success rate is high, and the collected blood sample detection result is accurate.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the piston capable of realizing rapid exhaust of the blood needle, the vent hole, the exhaust port, the exhaust inner cavity, the transverse exhaust groove and the longitudinal exhaust groove are arranged, so that the exhaust channel is smooth, the exhaust speed is high, the exhaust efficiency is high, rapid exhaust can be realized, the whole preset volume is filled with arterial blood, the blood sampling success rate is improved, and the accuracy of the collected blood sample detection result is improved.

2. According to the rapid exhaust needle for qi and blood, the piston, the core rod and the sleeve are arranged, the piston is provided with the first exhaust channel and the second exhaust channel which are formed by the longitudinal exhaust channel and the transverse exhaust channel, rapid exhaust can be realized, arterial blood is filled in the whole preset volume, and the problem that blood sampling failure caused by poor exhaust or a detection result is influenced by bubbles mixed in a collected blood sample is avoided.

Drawings

FIG. 1: the utility model discloses a structural schematic diagram of a piston capable of realizing quick exhaust of a blood needle,

FIG. 2: the top view of the exhaust port in figure 1 is schematically illustrated,

FIG. 3: the section A-A in FIG. 1 is a schematic structural view.

FIG. 4 is a schematic view of: the working process and the working principle of the piston in the sleeve are shown in the figure,

FIG. 5: the structure of one embodiment of the needle for quickly exhausting qi and blood is schematically shown.

In the figure: 1. the device comprises a piston 2, an inverted T-shaped connector 3, a first exhaust passage 4, a core rod 5, a second exhaust passage 6, an exhaust plug 7, a sleeve 9, a conical head 10, a needle seat 11 and a needle tube;

1.1, a ventilation opening 1.2, an exhaust inner cavity 1.3, a piston body 1.4, an exhaust opening 1.5, a longitudinal exhaust groove 1.6 and a transverse exhaust groove.

The arrows in fig. 4 indicate the direction of air flow.

Detailed Description

The technical solution in the embodiments of the present invention will be further clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:

example 1

As shown in fig. 1 to 4, the piston capable of achieving rapid exhaust of a blood gas needle according to the present invention includes a piston body 1.3, a ventilation port 1.1 is provided at the bottom of the piston body 1.3, an exhaust port 1.4 is provided at the top of the piston body 1.3, an exhaust inner cavity 1.2 is provided at the middle part of the piston body 1.3, and the ventilation port 1.1, the exhaust inner cavity 1.2 and the exhaust port 1.4 are communicated with an exhaust channel;

the bottom of the exhaust port 1.4 is provided with a transverse exhaust groove 1.6 along the radial direction, the inner side surface of the exhaust port 1.4 is provided with a longitudinal exhaust groove 1.5 along the axial direction, and the transverse exhaust groove 1.6 is communicated with the longitudinal exhaust groove 1.5 to form a first exhaust passage 3. A plurality of transverse exhaust slots 1.6 and a plurality of longitudinal exhaust slots 1.5 are provided around the exhaust port 1.4. At least 3 transverse exhaust grooves and at least 3 longitudinal exhaust grooves can be arranged, and a plurality of longitudinal exhaust grooves and transverse exhaust grooves are arranged, so that gas can be smoothly and quickly exhausted.

The utility model adopts the piston capable of realizing the quick exhaust of the blood gas needle to quickly exhaust the blood gas needle, and comprises a core rod 4 and a sleeve 7, wherein the bottom of the sleeve 7 is provided with a conical head 9, the conical head 9 is provided with a needle base 10, the needle base 10 is provided with a needle tube 11, the piston 1 is also included, the end part of the core rod 4 is provided with an inverted T-shaped connector 2, and the inverted T-shaped connector 2 penetrates through an exhaust port 1.4 and is arranged in an exhaust inner cavity 1.2;

the T-shaped air vent plug 6 is inserted into the air vent 1.1, and the air vent plug 6 is not communicated with liquid; the air vent plug can realize air exhaust, and when meeting the blood sample of collection, realize self sealedly. The vent plug is a common application in the art and will not be described in detail.

There is no gap between the inverted T-shaped connector 2 and the exhaust port 1.4, so that the core rod is prevented from being separated from the piston when the core rod is pulled. Therefore, the mode of arranging the transverse exhaust grooves and the longitudinal exhaust grooves realizes that the inverted T-shaped connector 2 can exhaust air quickly under the condition of being tightly connected with the exhaust port 1.4.

The core rod 4 is in clearance fit with the sleeve 7.

And a second exhaust passage 5 is formed by a gap between the core rod 4 and the sleeve 7.

The core rod can pull the piston to slide up and down in the sleeve.

Example 2

As shown in fig. 1 to 4, the ventilation port, the exhaust inner cavity and the exhaust port are communicated and are on the same central axis, so that an exhaust channel is formed; under the action of external force, gas is discharged from bottom to top;

the piston body of the piston capable of realizing the rapid exhaust of the blood gas needle can be made of a high polymer elastic material, and can be made of a high polymer elastic material TPU (thermoplastic polyurethane), which is also called silicone rubber. The rest is the same as example 1.

Working process or working principle:

the core rod 4 is pulled, the piston 1 is pulled to a position required by the sleeve 7, air in the sleeve 7 can pass through the exhaust plug 6, the exhaust inner cavity 1.2, the first exhaust passage 3 and the second exhaust passage 5 from bottom to top respectively under the action of arterial pressure, and the air is exhausted, so that the blood is filled with a required preset volume, and blood sample collection is realized.

Can set up a plurality of vertical exhaust grooves 1.5 and horizontal exhaust groove 1.6 in the gas vent 1.4, form first exhaust flue 3, under the exogenic action, the air can be discharged fast through vertical exhaust groove 1.5 and horizontal exhaust groove 1.6 smoothly to it is long when shortening the blood sampling.

The description of the directions and the relative positions of the structures in the present invention, such as the description of the front, the back, the left, the right, the upper and the lower, does not limit the present invention, and is only for the convenience of description.

Claims (5)

1. The piston capable of achieving rapid exhaust of the blood-gas needle is characterized by comprising a piston body (1.3), wherein a ventilation port (1.1) is formed in the bottom of the piston body (1.3), an exhaust port (1.4) is formed in the top of the piston body (1.3), an exhaust inner cavity (1.2) is formed in the middle of the piston body (1.3), and the ventilation port (1.1), the exhaust inner cavity (1.2) and the exhaust port (1.4) are communicated with an exhaust channel;

the bottom of the exhaust port (1.4) is provided with a transverse exhaust groove (1.6) along the radial direction, the inner side surface of the exhaust port (1.4) is provided with a longitudinal exhaust groove (1.5) along the axial direction, and the transverse exhaust groove (1.6) is communicated with the longitudinal exhaust groove (1.5) to form a first exhaust passage (3).

2. Piston capable of achieving rapid exhaust of a blood needle according to claim 1, characterized in that a plurality of transverse exhaust grooves (1.6) and a plurality of longitudinal exhaust grooves (1.5) are arranged around the exhaust port (1.4).

3. The piston capable of realizing the quick exhaust of the blood gas needle as claimed in claim 1 or 2, wherein the air vent, the exhaust inner cavity and the exhaust port are on the same central axis.

4. The piston of claim 3, wherein the piston body is made of a high polymer elastic material.

5. The quick exhaust qi and blood needle adopting the piston capable of realizing quick exhaust of the blood and blood needle as claimed in claims 1 to 4, is characterized by comprising a piston (1) and a core rod (4), wherein a sleeve (7) is sleeved outside the piston (1) and the core rod (4), the end part of the core rod (4) is provided with an inverted T-shaped connector (2), and the inverted T-shaped connector (2) penetrates through an exhaust port (1.4) and is arranged in an exhaust inner cavity (1.2);

the T-shaped vent plug (6) is inserted into the vent hole (1.1), and the vent plug (6) is not communicated with liquid;

the core rod (4) is in clearance fit with the sleeve (7).

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