CN108542436B - Suction injector for quantitatively sucking liquid and control method thereof - Google Patents
Suction injector for quantitatively sucking liquid and control method thereof Download PDFInfo
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- CN108542436B CN108542436B CN201810486872.1A CN201810486872A CN108542436B CN 108542436 B CN108542436 B CN 108542436B CN 201810486872 A CN201810486872 A CN 201810486872A CN 108542436 B CN108542436 B CN 108542436B
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- shaped piston
- needle
- liquid
- constant volume
- hollow pipeline
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0283—Pointed or sharp biopsy instruments with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
- A61B2010/0258—Marrow samples
Abstract
The invention discloses a suction injector for quantitatively sucking liquid and a control method thereof. The I-shaped piston is adopted to fix the space of the injector in a set volume, so that the invention can play a role in quantitatively sucking liquid, reduce the sucking times of medical staff and reduce the pain of patients; the I-shaped piston is fixed by the buckle, so that the liquid can be pumped and pushed out conveniently; kong Dan is adopted to control the air inlet and outlet, when in suction, the air in the constant volume cavity enters the needle tube through the small hole on Kong Dan, and the liquid enters the constant volume cavity by utilizing the pressure difference; the invention has simple, effective and safe operation and is suitable for popularization.
Description
Technical Field
The invention relates to the field of medical operation auxiliary instruments, in particular to a suction injector for quantitatively sucking liquid and a control method thereof.
Background
Bone marrow aspiration is a commonly used technique for extracting bone marrow fluid, and successful material drawing is helpful for correctly analyzing the hematopoietic function of bone marrow and observing the cell morphology at each stage. The technique is widely applied to clinical diagnosis, such as hemophilia, unknown blood cell number and morphological abnormality. The correct diagnosis of the bone marrow puncture test depends on the reliability of the sample taken. In the current bone marrow aspiration, bone marrow dilution (mixing blood in bone marrow aspiration liquid) is the most frequently caused cause of sampling failure in clinical practice, and analysis is because quantitative aspiration cannot be completed when the current clinic is used for bone marrow aspiration, so that a bone marrow sample is diluted. This greatly affects the accuracy of the bone marrow test results, and having to resample unnecessarily increases patient pain.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a quantitative aspiration syringe for aspirating bone marrow fluid and a control method thereof, which are used for quantitatively aspirating bone marrow fluid to reduce pain of patients.
It is an object of the present invention to provide a suction syringe for quantitatively sucking a liquid.
The aspiration syringe for quantitatively aspirating a liquid of the present invention comprises: the needle cylinder, the needle head, the pintle, the I-shaped piston, kong Dan and the buckle; wherein, the top end of the cylindrical needle cylinder is provided with a needle head which is communicated with the inside of the needle cylinder, and the bottom end of the needle cylinder is provided with a pintle; an I-shaped piston is arranged in the needle cylinder, the position of the I-shaped piston in the needle cylinder is fixed through a buckle, and a space surrounded by the front surface of the I-shaped piston and the inner wall of the needle cylinder forms a constant volume cavity; the I-shaped piston comprises an upper fixed piston, a longitudinal hollow pipeline and a lower fixed piston, the longitudinal hollow pipeline in the interior is coaxial with the needle cylinder, the outer walls of the front end and the rear end of the longitudinal hollow pipeline are respectively provided with an annular upper fixed piston and a lower fixed piston which are connected with the longitudinal hollow pipeline into a whole, and the outer diameters of the upper fixed piston and the lower fixed piston are equal to the inner diameter of the needle cylinder, so that sealing is realized; kong Dan and Kong Dan are arranged at the top of the longitudinal hollow pipeline of the I-shaped piston, the outer diameter of the Kong Dan and Kong Dan is equal to the inner diameter of the longitudinal hollow pipeline, and the small holes of the Kong Danna can pass through gas, but are closed after encountering liquid; the needle head is connected to the upper-stage needle tube, the needle plug is pulled, and air in the constant volume cavity gap flows out through the small hole of Kong Danna and the longitudinal hollow pipeline of the I-shaped piston; negative pressure is formed in the constant volume cavity, and liquid enters the constant volume cavity by utilizing pressure difference; the liquid fills the constant volume cavity, the volume of the liquid reaches the set volume, and the small holes on Kong Dan are closed; the needle head is separated from the needle tube at the upper stage, the buckle is pulled out, the I-shaped piston is in a free state at the moment, the needle bolt is pushed to push the I-shaped piston under the action of pushing force, and liquid in the constant volume cavity is pushed out from the injector, so that quantitative liquid is obtained.
The buckle comprises a holding handle and a positioning bolt; the transverse hollow pipeline penetrates through the longitudinal hollow pipeline, and the axis of the transverse hollow pipeline and the axis of the longitudinal hollow pipeline are positioned on the same plane and are mutually perpendicular; the side wall of the needle cylinder is provided with a through hole, and the bottom end of the positioning bolt extends into the transverse hollow pipeline through the through hole so as to limit the position of the I-shaped piston, thereby determining the volume of the constant volume cavity; the top end of the positioning bolt is provided with a holding handle, the holding handle is positioned outside the needle cylinder, the outer diameter of the holding handle is larger than the diameter of the through hole, and the clamping buckle is inserted and pulled out through the holding handle. The outer diameter of the transverse hollow tube is smaller than the inner diameter of the wale hollow tube such that gas flows outwardly from the transverse hollow tube through the wale hollow tube.
The position of the I-shaped piston is fixed through the buckle, so that the volume of the constant volume cavity is set, and the volume of the constant volume cavity is 0.1-0.3 ml.
The upper fixed piston and the lower fixed piston of the I-shaped piston are made of rubber so as to realize sealing.
The outer wall of the needle cylinder is provided with scale marks, zero scale marks are aligned with the front end face of the needle cylinder, and the scale marks at the set volume are aligned with the front surface of the I-shaped piston.
Another object of the present invention is to provide a control method of a suction syringe for quantitatively sucking a liquid.
The control method of the suction injector for quantitatively sucking liquid comprises the following steps:
1) The front surface of the I-shaped piston is aligned with scale marks at the set volume, and the position of the I-shaped piston in the needle cylinder is fixed through a buckle;
2) The needle head is connected to the upper-stage needle tube, the needle plug is pulled, and air in the constant volume cavity gap flows out through the small hole of Kong Danna and the longitudinal hollow pipeline of the I-shaped piston;
3) Negative pressure is formed in the constant volume cavity, and liquid enters the constant volume cavity by utilizing pressure difference;
4) The liquid fills the constant volume cavity, the volume of the liquid reaches the set volume, and the small holes on Kong Dan are closed;
5) The needle head is separated from the needle tube at the upper stage, the buckle is pulled out, and the I-shaped piston is in a free state at the moment;
6) Pushing the pintle, and pushing the I-shaped piston by the pintle under the action of the pushing force to push out the liquid in the constant volume cavity from the injector, thereby obtaining quantitative liquid.
The invention has the advantages that:
the I-shaped piston is adopted to fix the space of the injector in a set volume, so that the invention can play a role in quantitatively sucking liquid, reduce the sucking times of medical staff and reduce the pain of patients; the I-shaped piston is fixed by the buckle, so that the liquid can be pumped and pushed out conveniently; kong Dan is adopted to control the air inlet and outlet, when in suction, the air in the constant volume cavity enters the needle tube through the small hole on Kong Dan, and the liquid enters the constant volume cavity by utilizing the pressure difference; the invention has simple, effective and safe operation and is suitable for popularization.
Drawings
FIG. 1 is a cross-sectional view of one embodiment of a pump syringe for quantitatively pumping liquid of the present invention;
fig. 2 is a cross-sectional view of one embodiment of an i-shaped piston of a suction syringe for quantitatively drawing liquid in accordance with the present invention.
Detailed Description
The invention will be further elucidated by means of specific embodiments in conjunction with the accompanying drawings.
As shown in fig. 1, the aspiration syringe for quantitatively aspirating a liquid of the present embodiment includes: the needle cylinder 1, the needle head 2, the needle bolt 3, the I-shaped pistons 4 and Kong Dan 5 and the buckle 6; wherein, the top end of the cylindrical needle cylinder is provided with a needle head 2 which is communicated with the inside of the needle cylinder 1, and the bottom end of the needle cylinder 1 is provided with a pintle 3; an I-shaped piston 4 is arranged in the needle cylinder 1, the position of the I-shaped piston in the needle cylinder is fixed through a buckle 6, and a space surrounded by the front surface of the I-shaped piston 4 and the inner wall of the needle cylinder 1 forms a constant volume cavity; as shown in fig. 2, the i-shaped piston comprises an upper fixed piston 41, a longitudinal hollow pipe 42 and a lower fixed piston 43, wherein the longitudinal hollow pipe 42 with the inner hollow is coaxial with the needle cylinder, the annular upper fixed piston 41 and lower fixed piston 42 which are connected with the front end and the rear end of the longitudinal hollow pipe 42 into a whole are respectively arranged on the outer wall of the front end and the rear end of the longitudinal hollow pipe 42, and the outer diameters of the upper fixed piston and the lower fixed piston are equal to the inner diameter of the needle cylinder 1, so that the sealing is realized; the outer diameter of Kong Dan, kong Dan is set equal to the inner diameter of the wale hollow pipe 42 at the top of the wale hollow pipe 42 of the i-shaped piston 4. In this embodiment, kong Dan uses Kong Dan the same as in the BD blood gas needle.
As shown in fig. 2, the axis of the transverse hollow pipe 63 and the axis of the longitudinal hollow pipe 42 are located on the same plane and are perpendicular to each other, and the bottom end of the positioning bolt of the buckle 6 extends into the transverse hollow pipe 63 through the through hole; the outer diameter of the transverse hollow tubes 63 is smaller than the inner diameter of the wale hollow tubes 42 so that gas flows outwardly from the transverse hollow tubes through the wale hollow tubes.
In this embodiment, a suction syringe for quantitatively sucking a liquid is used for sucking a bone marrow liquid, thereby achieving quantitative suction to reduce pain of a patient.
The control method of the suction injector for quantitatively sucking bone marrow fluid of the embodiment comprises the following steps:
1) The front surface of the I-shaped piston is aligned with the scale mark at the position of 0.2ml, and the position of the I-shaped piston in the needle cylinder is fixed through a buckle;
2) The needle head is connected to the upper marrow puncture needle, the needle plug is pulled, and air in the constant volume cavity gap flows out through the small hole of Kong Danna and the longitudinal hollow pipeline of the I-shaped piston;
3) Negative pressure is formed in the constant volume cavity, and bone marrow fluid enters the constant volume cavity by utilizing pressure difference;
4) The bone marrow fluid fills the constant volume cavity, the volume of the bone marrow fluid reaches 0.2ml, and the small holes on Kong Dan are closed;
5) The needle head is separated from the bone marrow puncture needle, the buckle is pulled out, and the I-shaped piston is in a free state at the moment;
6) Pushing the needle plug, under the action of the pushing force, the needle plug pushes the I-shaped piston to push out the bone marrow fluid in the constant volume cavity from the injector, thereby obtaining quantitative fluid.
Finally, it should be noted that the examples are disclosed for the purpose of aiding in the further understanding of the present invention, but those skilled in the art will appreciate that: various alternatives and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the disclosed embodiments, but rather the scope of the invention is defined by the appended claims.
Claims (7)
1. A suction syringe for quantitatively sucking a liquid, the suction syringe comprising: the needle cylinder, the needle head, the pintle, the I-shaped piston, kong Dan and the buckle; wherein, the top end of the cylindrical needle cylinder is provided with a needle head which is communicated with the inside of the needle cylinder, and the bottom end of the needle cylinder is provided with a pintle; an I-shaped piston is arranged in the needle cylinder, the position of the I-shaped piston in the needle cylinder is fixed through a buckle, and a space surrounded by the front surface of the I-shaped piston and the inner wall of the needle cylinder forms a constant volume cavity; the I-shaped piston comprises an upper fixed piston, a longitudinal hollow pipeline and a lower fixed piston, wherein the longitudinal hollow pipeline in the interior is coaxial with the needle cylinder, the outer walls of the front end and the rear end of the longitudinal hollow pipeline are respectively provided with an annular upper fixed piston and a lower fixed piston which are connected with the longitudinal hollow pipeline into a whole, and the outer diameters of the upper fixed piston and the lower fixed piston are equal to the inner diameter of the needle cylinder, so that sealing is realized; kong Dan is arranged at the top of the longitudinal hollow pipeline of the I-shaped piston, the outer diameter of the Kong Dan is equal to the inner diameter of the longitudinal hollow pipeline, and the small holes of the Kong Danna can pass through gas, but are closed after encountering liquid; the needle head is connected to the upper-stage needle tube, the needle plug is pulled, and air in the constant volume cavity gap flows out through the small hole of Kong Danna and the longitudinal hollow pipeline of the I-shaped piston; negative pressure is formed in the constant volume cavity, and liquid enters the constant volume cavity by utilizing pressure difference; the liquid fills the constant volume cavity, the volume of the liquid reaches the set volume, and the small holes on Kong Dan are closed; the needle head is separated from the needle tube at the upper stage, the buckle is pulled out, the I-shaped piston is in a free state at the moment, the needle bolt is pushed to push the I-shaped piston under the action of pushing force, and liquid in the constant volume cavity is pushed out from the injector, so that quantitative liquid is obtained.
2. The aspiration syringe of claim 1, wherein the catch comprises a handle and a detent; the transverse hollow pipeline penetrates through the longitudinal hollow pipeline, the axis of the transverse hollow pipeline and the axis of the longitudinal hollow pipeline are located on the same plane, and the axis of the transverse hollow pipeline and the axis of the longitudinal hollow pipeline are perpendicular to each other; the side wall of the needle cylinder is provided with a through hole, and the bottom end of the positioning bolt extends into the transverse hollow pipeline through the through hole so as to limit the position of the I-shaped piston, thereby determining the volume of the constant volume cavity; the top end of the positioning bolt is provided with a holding handle, the holding handle is positioned outside the needle cylinder, the outer diameter of the holding handle is larger than the diameter of the through hole, and the clamping buckle is inserted and pulled out through the holding handle.
3. The aspiration syringe of claim 2, wherein the outer diameter of the transverse hollow tube is smaller than the inner diameter of the wale hollow tube such that gas flows outwardly from the transverse hollow tube through the wale hollow tube.
4. The aspiration syringe of claim 1, wherein the volume of the constant volume cavity is 0.1-0.3 ml.
5. The aspiration syringe of claim 1, wherein the upper and lower fixed pistons of the i-shaped piston are rubber.
6. The suction injector of claim 1, wherein the outer wall of the barrel is provided with graduation marks, zero graduation marks are aligned with the front face of the barrel, and graduation marks at a set volume are aligned with the front face of the i-shaped piston.
7. A control method of a suction syringe for quantitatively sucking a liquid according to claim 1, wherein the control method comprises the steps of:
1) The front surface of the I-shaped piston is aligned with scale marks at the set volume, and the position of the I-shaped piston in the needle cylinder is fixed through a buckle;
2) The needle head is connected to the upper-stage needle tube, the needle plug is pulled, and air in the constant volume cavity gap flows out through the small hole of Kong Danna and the longitudinal hollow pipeline of the I-shaped piston;
3) Negative pressure is formed in the constant volume cavity, and liquid enters the constant volume cavity by utilizing pressure difference;
4) The liquid fills the constant volume cavity, the volume of the liquid reaches the set volume, and the small holes on Kong Dan are closed;
5) The needle head is separated from the needle tube at the upper stage, the buckle is pulled out, and the I-shaped piston is in a free state at the moment;
6) Pushing the pintle, and pushing the I-shaped piston by the pintle under the action of the pushing force to push out the liquid in the constant volume cavity from the injector, thereby obtaining quantitative liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810486872.1A CN108542436B (en) | 2018-05-21 | 2018-05-21 | Suction injector for quantitatively sucking liquid and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810486872.1A CN108542436B (en) | 2018-05-21 | 2018-05-21 | Suction injector for quantitatively sucking liquid and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108542436A CN108542436A (en) | 2018-09-18 |
| CN108542436B true CN108542436B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810486872.1A Active CN108542436B (en) | 2018-05-21 | 2018-05-21 | Suction injector for quantitatively sucking liquid and control method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646233B (en) * | 2019-11-22 | 2020-04-07 | 广州赛太特生物医学科技有限公司 | Cell diagnosis is with quantitative sampling device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1287781C (en) * | 1988-07-07 | 1991-08-20 | Jean G. Alary | Syringe locking device (seralitair) |
| CN104382738A (en) * | 2014-10-24 | 2015-03-04 | 苏州仁捷瑞自动化科技有限公司 | Injector capable of realizing quantitative and fast suction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9861763B2 (en) * | 2013-07-01 | 2018-01-09 | Credence Medsystems, Inc. | Safety syringe |
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2018
- 2018-05-21 CN CN201810486872.1A patent/CN108542436B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1287781C (en) * | 1988-07-07 | 1991-08-20 | Jean G. Alary | Syringe locking device (seralitair) |
| CN104382738A (en) * | 2014-10-24 | 2015-03-04 | 苏州仁捷瑞自动化科技有限公司 | Injector capable of realizing quantitative and fast suction |
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| CN108542436A (en) | 2018-09-18 |
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