CN111671440A - Artery blood sampling device - Google Patents

Artery blood sampling device Download PDF

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Publication number
CN111671440A
CN111671440A CN202010709787.4A CN202010709787A CN111671440A CN 111671440 A CN111671440 A CN 111671440A CN 202010709787 A CN202010709787 A CN 202010709787A CN 111671440 A CN111671440 A CN 111671440A
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ring groove
arterial blood
hole
collection device
blood collection
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CN111671440B (en
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张小宁
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Xuzhou Medical University
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Xuzhou Medical University
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150015Source of blood
    • A61B5/15003Source of blood for venous or arterial blood
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150206Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/150007Details
    • A61B5/150206Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150221Valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/15Devices for taking samples of blood
    • A61B5/153Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Hematology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Manufacturing & Machinery (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses an artery blood sampling device which comprises a needle head, a pressurizing piece and an extracting piece, wherein a luer connector is arranged at the end part of the pressurizing piece, one end of the needle head is connected with the luer connector through a flexible leather hose, and one end of the needle head is a metal puncture head; the pressurizing part comprises a shell and an inner conversion pipe, a through hole is formed in the shell, the inner conversion pipe is arranged in the through hole, a first chamber is arranged in the side wall of the shell, and the first chamber divides the side wall of the shell into an inner wall and an outer wall; in the practical process, the position of the inner conversion pipe can be adjusted by the extracting piece, so that the state of the pressurizing piece can be changed. So that the blood can be extracted and temporarily placed under positive pressure to prevent the outflow of blood.

Description

Artery blood sampling device
Technical Field
The invention relates to the technical field of medical equipment, in particular to an artery blood sampling device.
Background
In a child hospital, arterial blood collection for a pediatric patient is one of the commonly used nursing operations in clinical work, the hospital needs to confirm the physical condition of the patient according to the collected blood sample and determine the next treatment scheme according to the data of the blood sample, at present, critical patients, mechanically ventilated patients, hemodynamically unstable patients and the like can carry out invasive arterial blood pressure monitoring, a radial artery placing tube is usually selected for the arterial placing tube of the patients, a prepared weak heparin is usually pumped into the arterial placing tube by using a pressurizing bag to prevent blood backflow and blocking the placing tube, so the conventional method for collecting blood of the radial artery of the patients firstly clamps an indwelling needle (namely the arterial placing tube), disconnects an arterial pressure measuring device, uses a syringe to draw part of blood out, firstly draws out the heparin and part of blood in the arterial placing tube, and then replaces the syringe to begin formal blood collection, the blood sampling method is characterized in that a patient needs to puncture at least twice each time, the puncture part is easy to be infected by frequently puncturing an artery, complications such as local hematoma, arterial thromboembolism and even pseudo aneurysm are caused, and for the patient with serious illness in hospital, arterial blood sampling and blood sampling are basically needed every day for analyzing, obviously, blood sampling is not suitable every time, the patient can monitor the blood pressure condition of the patient during the hospital except blood sampling analysis, but the current methods are more traditional and are recorded after the pressure measurement of a non-invasive pressure measuring instrument, the pain of the patient is easily increased under the condition that the patient hangs a drip, on one hand, the blood pressure condition of the patient cannot be dynamically monitored in real time, and on the other hand, the measured data is greatly influenced by the outside and the patient, and is not necessarily accurate.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that a secondary needle insertion is needed and the backflow of blood is prevented in the process of arterial blood sampling.
In order to solve the technical problems, the invention provides the following technical scheme: an artery blood sampling device comprises a needle head, a pressurizing piece and an extracting piece, wherein a luer connector is arranged at the end part of the pressurizing piece, one end of the needle head is connected with the luer connector through a flexible leather hose, and one end of the needle head is a metal puncture head;
the pressurizing part comprises a shell and an inner conversion pipe, a through hole is formed in the shell, the inner conversion pipe is arranged in the through hole, a first chamber is arranged in the side wall of the shell, and the first chamber divides the side wall of the shell into an inner wall and an outer wall;
the inner wall comprises a first shaft end, a middle end and a second shaft end, and the inner diameters of the first shaft end and the second shaft end are the same as the outer diameter of the inner conversion pipe; the inner diameter of the middle end is larger than the outer diameter of the inner conversion pipe, and a second chamber is formed between the middle end and the inner conversion pipe;
first liquid passing holes are formed in the first shaft end and the second shaft end, second liquid passing holes are formed in the end portion of the inner conversion pipe, and the axial distance between the second liquid passing holes is smaller than that between the first liquid passing holes;
the inner conversion pipe is internally provided with a one-way valve, and the outer side of the middle part of the inner conversion pipe is connected with the inner side of the middle end.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: the check valve comprises a first partition plate, a second partition plate, a first spring and a flow resisting ball, wherein the first spring is connected between the middle of the first partition plate and the flow resisting ball.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: the periphery of the first partition plate is provided with a first through hole, the middle of the second partition plate is provided with a second through hole, and the diameter of the second through hole is smaller than that of the ball of the flow resisting ball.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: the outer side of the inner conversion pipe is provided with an auxiliary plate, and the auxiliary plate is arranged in the second chamber.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: a first ring groove and a second ring groove are formed in the inner wall of the middle end, and the width and the depth of the first ring groove and the second ring groove are the same;
the first ring groove and the second ring groove are connected through a first short groove, and the first short grooves are distributed between the first ring groove and the second ring groove in a circumferential array mode;
the first short groove and the first ring groove have the same depth.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: guide blocks are arranged on the outer side of the auxiliary plate, the guide blocks are distributed on the outer side of the auxiliary plate in a circumferential array mode, and the number of the guide blocks corresponds to that of the first short grooves;
the guide block width is the same as the first ring groove width, and the guide block is embedded in the first ring groove.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: the distance from the guide block to the second liquid passing hole is equal to the distance from the second annular groove to the first liquid passing hole correspondingly.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: and a second spring is arranged in the second chamber and is connected with the auxiliary plate and the inner end wall of the second chamber.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: the extracting piece comprises a liquid storage cylinder, a piston and a drawing rod, wherein the piston is arranged in the liquid storage cylinder, and the drawing rod is connected with the piston;
the liquid storage cylinder tip is provided with the grafting end, grafting end tip is provided with first spline, interior converter tube end portion be provided with first spline complex second spline.
As a preferable aspect of the arterial blood collecting device of the present invention, wherein: an external pipe is arranged on the outer wall, and a pipeline is arranged in the external pipe and communicated with the first cavity;
the end part of the external connecting pipe is provided with a plugging block.
The invention has the beneficial effects that: when the blood pressure regulator is used, the position of the inner conversion pipe can be adjusted by the extraction piece, so that the state of the pressurizing piece is changed, blood can be extracted, and the blood can be temporarily released under positive pressure to prevent backflow of the blood.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic view of an arterial blood collection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an exploded cross-sectional view of a compression member of an arterial blood collection device according to an embodiment of the present invention;
FIG. 3 is a schematic sectional view of a pressurizing member of an arterial blood sampling device according to an embodiment of the present invention;
FIG. 4 is a schematic structural view illustrating a blood drawing state of a pressurizing member in the arterial blood drawing device according to an embodiment of the present invention;
FIG. 5 is a schematic view illustrating a structure of a pressure applying member in an arterial blood sampling device according to an embodiment of the present invention in a cleaning state;
FIG. 6 is a schematic structural view of an inner transition tube of an arterial blood sampling device according to an embodiment of the present invention;
fig. 7 is a schematic structural view of an extraction member in the arterial blood collection device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Referring to fig. 1 to 7, the present embodiment provides an arterial blood sampling device, including,
the puncture needle comprises a needle head 100, a pressurizing part 200 and an extracting part 300, wherein a luer connector 201 is arranged at the end part of the pressurizing part 200, one end of the needle head 100 is connected with the luer connector 201 through a flexible leather hose 202, and one end of the needle head is a metal puncture head 101;
the pressurizing member 200 comprises a shell 203 and an inner conversion pipe 204, wherein a through hole 205 is formed in the shell 203, the inner conversion pipe 204 is arranged in the through hole 205, a first chamber 206 is formed in the side wall of the shell 203, and the first chamber 206 divides the side wall of the shell 203 into an inner wall 207 and an outer wall 208;
the inner wall 207 includes a first shaft end 207a, an intermediate end 207b, and a second shaft end 207c, the first shaft end 207a and the second shaft end 207c having the same inner diameter as the outer diameter of the inner transition tube 204; the intermediate end 207b has an inner diameter greater than the outer diameter of the inner transition tube 204 and defines a second chamber 207d therebetween;
first liquid passing holes 207e are formed in the first shaft end 207a and the second shaft end 207c, second liquid passing holes 204a are formed in the end portion of the inner conversion pipe 204, and the axial distance between the second liquid passing holes 204a is smaller than the axial distance between the first liquid passing holes 207 e;
the inner switching tube 204 is provided with a check valve 204b therein, and the outside of the middle portion of the inner switching tube 204 is connected to the inside of the middle end 207 b.
The diameter of the second through hole 204b-6 is smaller than the spherical diameter of the flow resisting ball 204 b-4.
An auxiliary plate 401 is disposed outside the inner transition pipe 204, and the auxiliary plate 401 is disposed in the second chamber 207 d.
A first ring groove 402 and a second ring groove 403 are formed in the inner wall of the middle end 207b, and the width and the depth of the first ring groove 402 and the depth of the second ring groove 403 are the same;
the first ring groove 402 and the second ring groove 403 are connected through a first short groove 404, and the first short grooves 404 are distributed between the first ring groove 402 and the second ring groove 403 in a circumferential array;
the other side of the second annular groove 403 is also provided with a third annular groove 408 and a second short groove 407, the second short groove 407 is communicated with the second annular groove 403 and the third annular groove 408, and the second short groove 407 is not corresponding to the first short groove 404 in the axial direction.
The first short groove 404 has the same depth as the first ring groove 402.
The guide blocks 405 are arranged on the outer side of the auxiliary plate 401, the guide blocks 405 are distributed on the outer side of the auxiliary plate 401 in a circumferential array mode, and the number of the guide blocks 405 corresponds to the number of the first short grooves 404;
the width of the guide block 405 is the same as the width of the first groove 402, and the guide block 405 is embedded in the first groove 402.
The distance from the guide block 405 to the second liquid passing hole 204a is equal to the distance from the second annular groove 403 to the first liquid passing hole 207 e.
A second spring 406 is disposed in the second chamber 207d, and the second spring 406 connects the auxiliary plate 401 and the inner end wall of the second chamber 207 d.
The positioning of the guide block 405 in the third groove 408 has the same effect as the positioning of the guide block 405 in the first groove 402.
The second spring 406 is used for returning the auxiliary plate 401 and the inner switching tube 204 integrally, when the guide block 405 is located in the second annular groove 403 to rotate the guide block 405 to a position corresponding to the position of the first short groove 404, the second spring 406 pushes the auxiliary plate 401, and the guide block 405 enters the first annular groove 402 along the first short groove 404 to push the inner switching tube 204 integrally.
The extraction piece 300 comprises a liquid storage cylinder 301, a piston 302 and an extraction rod 303, wherein the piston 302 is arranged in the liquid storage cylinder 301, and the extraction rod 303 is connected with the piston 302;
the end of the liquid storage barrel 301 is provided with a plugging end 301a, the end of the plugging end 301a is provided with a first spline 301b, and the end of the inner conversion pipe 204 is provided with a second spline 204c matched with the first spline 301 b.
An outer connecting pipe 208a is arranged on the outer wall 208, and a pipeline 208b is arranged in the outer connecting pipe 208a and communicated with the first chamber 206;
the end of the extension tube 208a is provided with a block 208 c. The block 208c is a soft rubber that seals the end of the extension tube 208 a. Further, the blocking block 208c is a luer connector, so that the disposable medical catheter is convenient to use for multiple times and is more sanitary.
Heparin may be injected into the first chamber 206 through the extension tube 208 a.
The check valve 204b includes a first diaphragm 204b-1, a second diaphragm 204b-2, a first spring 204b-3, and a choke ball 204b-4, wherein the first spring 204b-3 connects the middle of the first diaphragm 204b-1 with the choke ball 204 b-4.
The periphery of the first partition plate 204b-1 is provided with a first through hole 204b-5, the middle of the second partition plate 204b-2 is provided with a second through hole 204b-6, and the diameter of the second through hole 204b-6 is smaller than the spherical diameter of the flow blocking ball 204 b-4.
The inner conversion pipe 204 can rotate by controlling the rotation of the liquid storage barrel 301 through the matching connection of the first spline 301b and the second spline 204c, and the inner conversion pipe 204 is provided with the guide block 405 which is embedded into the first annular groove 402 to limit the axial direction of the inner conversion pipe 204, so that the inner conversion pipe 204 can rotate without axial movement, at the moment, the first liquid passing hole 207e and the second liquid passing hole 204a are not in corresponding positions, and meanwhile, the first chamber 206 is not communicated with the inner space of the inner conversion pipe 204, as shown in the structure of fig. 3, at the moment, the flow blocking ball 204b-4 is abutted against the second through hole 204b-6 under the action of the first spring 204b-3, the space on the left side of the luer 201 is closed, and blood in the needle head on the right side cannot flow out under the positive pressure.
During the rotation process, when the guide block 405 corresponds to the first short groove 404, the guide block 405 can enter the second annular groove 403 through the first short groove 404, at this time, the first liquid passing hole 207e corresponds to the second liquid passing hole 204a, and the first chamber 206 is communicated with the space in the inner conversion pipe 204.
The insertion end 301a is a circular tube disposed at the end of the liquid storage barrel 301, and the outer wall of the insertion end is in interference fit with the through hole 205 to ensure that the insertion end can be kept tight and will not fall off when the pull rod 303 is pulled.
Referring to fig. 3, it is noted that the guide block 405 is in a blocking state when being in the third ring groove 408, and at this time, the first liquid passing hole 207e and the second liquid passing hole 204a do not correspond in position, specifically, the inner transfer pipe 204 blocks the first liquid passing hole 207e on the left side, and the first liquid passing hole 207e on the right side corresponds in position to the second liquid passing hole 204a on the right side, that is, the first chamber 206 communicates with the through hole 205 through the first liquid passing hole 207e on the right side, specifically, the through hole 205 area on the right side of the check valve 204 b;
referring to fig. 4, it is noted that the guide block 405 is in the blood drawing state in the second ring groove 403, and at this time, the first liquid passing holes 207e on both sides are blocked by the inner transfer tube 204, and the first chamber 206 is not communicated with the through hole 205 at all.
Referring to fig. 5, it is noted that the guide block 405 is in a cleaning state in the first ring groove 402, at this time, the first liquid passing hole 207e on the left side corresponds to the second liquid passing hole 204a on the left side, the first liquid passing hole 207e on the right side is blocked by the inner transfer pipe 204, and at this time, the first chamber 206 is communicated with the through hole 205 through the first liquid passing holes 207e on both sides, specifically, the through hole 205 area on the left side of the check valve 204 b;
when the device is in a blood drawing state initially, the needle 100 is partially inserted into an artery, when the device is used, when the drawing part 300 is inserted into the through hole 205 through the end part, blood is drawn, because the internal space of the pressurizing part 200 is in a sealed state, when the drawing rod 303 is drawn, because the air pressure at two ends of the second partition plate 204b-2 is changed, the flow blocking ball 204b-4 is pressed by the air pressure to be far away from the second partition plate 204b-2, the blood is drawn to flow from one side of the second partition plate 204b-2 to one side of the first partition plate 204b-1, and then enters the liquid storage barrel 301, and the blood drawing is completed.
In the process, blood enters the pupil 205 through the needle 100, the flexible leather tube 202 and the luer 201, and then enters the liquid storage barrel 301 through the one-way valve 204b inside the inner transfer tube 204.
The drawing member 300 is still connected to the pressurizing member 200 near the end of the blood drawing, and preferably, the drawing member 300 is pulled out after the blood drawing is finished, a new drawing member 300 is connected to the pressurizing member 200, and the following actions are performed:
the state of the device is adjusted to be in a blocking state, heparin is injected into the first cavity 206, so that the heparin enters the first cavity 206 and is communicated with the area of the through hole 205 on the right side of the one-way valve 204b through the first liquid passing hole 207e on the right side, the heparin is filled into the first cavity 206 through the external connection tube 208a by utilizing the needle cylinder at the moment, the first cavity 206 can be filled with the heparin, and when the heparin is injected, due to the fact that new liquid is added into the first cavity 206, the original air, namely the liquid mixed by the heparin and the blood, is discharged into the new needle cylinder from the left side through the one-way valve 204b, and therefore positive pressure is formed between the first cavity 406 and the right.
After the single use, the apparatus is adjusted to a cleaning state, and blood and heparin are blocked in the through hole 204 space on the right side of the check valve 204b, and a cleaning solution or the like is injected from the left side, whereby the space in the through hole 205 on the left side of the check valve 204b and the space in the first chamber 206 can be cleaned and sterilized.
When the liquid needs to be taken again, the inserting end 301a is inserted into the through hole 205, the extracting member 300 is rotated to adjust the position of the guide block 405 to move the guide block into the second annular groove 403, the guide block 405 is clamped in the second annular groove 403, the inner conversion tube 204 integrally moves along the axial direction at the moment, the first liquid passing hole 207e corresponds to the second liquid passing hole 204a in position, and at the moment, the extracting member 300 is used for formally extracting blood.
The device saves time, reduces the puncture times and relieves the pain of patients.
The arrangement is merely illustrative. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. An arterial blood collection device characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the puncture needle comprises a needle head (100), a pressurizing piece (200) and an extracting piece (300), wherein a luer connector (201) is arranged at the end part of the pressurizing piece (200), one end of the needle head (100) is connected with the luer connector (201) through a flexible leather hose (202), and one end of the needle head is a metal puncture head (101);
the pressurizing part (200) comprises a shell (203) and an inner conversion pipe (204), a through hole (205) is formed in the shell (203), the inner conversion pipe (204) is arranged in the through hole (205), a first chamber (206) is formed in the side wall of the shell (203), and the first chamber (206) divides the side wall of the shell (203) into an inner wall (207) and an outer wall (208);
the inner wall (207) includes a first axial end (207a), an intermediate end (207b), and a second axial end (207c), the first and second axial ends (207a, 207c) having an inner diameter that is the same as an outer diameter of the inner transition tube (204); the inner diameter of the middle end (207b) is larger than the outer diameter of the inner transition tube (204), and a second chamber (207d) is formed between the middle end and the inner transition tube;
a first liquid passing hole (207e) is formed in each of the first shaft end (207a) and the second shaft end (207c), a second liquid passing hole (204a) is formed in the end portion of the inner conversion pipe (204), and the axial distance between the second liquid passing holes (204a) is smaller than the axial distance between the first liquid passing holes (207 e);
a one-way valve (204b) is arranged in the inner conversion pipe (204), and the outer side of the middle part of the inner conversion pipe (204) is connected with the inner side of the middle end (207 b).
2. The arterial blood collection device according to claim 1, wherein: the check valve (204b) comprises a first partition plate (204b-1), a second partition plate (204b-2), a first spring (204b-3) and a flow blocking ball (204b-4), wherein the first spring (204b-3) is connected between the middle of the first partition plate (204b-1) and the flow blocking ball (204 b-4).
3. The arterial blood collection device according to claim 1 or 2, wherein: a first through hole (204b-5) is formed in the periphery of the first partition plate (204b-1), a second through hole (204b-6) is formed in the middle of the second partition plate (204b-2), and the diameter of the second through hole (204b-6) is smaller than the spherical diameter of the flow blocking ball (204 b-4).
4. An arterial blood collection device according to claim 3 wherein: an auxiliary plate (401) is arranged on the outer side of the inner conversion pipe (204), and the auxiliary plate (401) is arranged in the second chamber (207 d).
5. The arterial blood collection device according to claim 4, wherein: a first ring groove (402) and a second ring groove (403) are formed in the inner wall of the middle end (207b), and the width and the depth of the first ring groove (402) and the second ring groove (403) are the same;
the first ring groove (402) and the second ring groove (403) are connected through a first short groove (404), and the first short grooves (404) are distributed between the first ring groove (402) and the second ring groove (403) in a circumferential array;
the first short groove (404) and the first ring groove (402) have the same depth.
6. The arterial blood collection device according to claim 5, wherein: guide blocks (405) are arranged on the outer side of the auxiliary plate (401), the guide blocks (405) are distributed on the outer side of the auxiliary plate (401) in a circumferential array mode, and the number of the guide blocks (405) corresponds to the number of the first short grooves (404);
the width of the guide block (405) is the same as that of the first ring groove (402), and the guide block (405) is embedded in the first ring groove (402).
7. The arterial blood collection device according to claim 6, wherein: the distance from the guide block (405) to the second liquid passing hole (204a) is equal to the distance from the second annular groove (403) to the first liquid passing hole (207 e).
8. The arterial blood collection device according to claim 7, wherein: a second spring (406) is arranged in the second cavity (207d), and the second spring (406) is connected with the auxiliary plate (401) and the inner end wall of the second cavity (207 d).
9. The arterial blood collection device according to claim 8, wherein: the extraction piece (300) comprises a liquid storage cylinder (301), a piston (302) and a pull rod (303), wherein the piston (302) is arranged in the liquid storage cylinder (301), and the pull rod (303) is connected with the piston (302);
an inserting end (301a) is arranged at the end part of the liquid storage barrel (301), a first spline (301b) is arranged at the end part of the inserting end (301a), and a second spline (204c) matched with the first spline (301b) is arranged at the end part of the inner conversion pipe (204).
10. The arterial blood collection device according to claim 8 or 9, wherein: an outer connecting pipe (208a) is arranged on the outer wall (208), and a pipeline (208b) is arranged in the outer connecting pipe (208a) and communicated with the first chamber (206);
the end part of the external connecting pipe (208a) is provided with a blocking block (208 c).
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JP2017042226A (en) * 2015-08-24 2017-03-02 日機装株式会社 Detention needle assembly
CN207837562U (en) * 2017-04-12 2018-09-11 侯颖萍 Multi-functional remaining needle
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CN210644755U (en) * 2019-06-28 2020-06-02 重庆医科大学附属儿童医院 Remaining needle

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US20180325437A1 (en) * 2003-08-01 2018-11-15 Dexcom, Inc. Analyte sensor
CN201603252U (en) * 2010-01-12 2010-10-13 吴林元 Positive-pressure closed-type arterious and venous indwelling needle
CN204601258U (en) * 2015-04-23 2015-09-02 中国人民解放军第四军医大学 A kind of multi-functional remaining needle
JP2017042226A (en) * 2015-08-24 2017-03-02 日機装株式会社 Detention needle assembly
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