CN217838947U - Inoculation needle - Google Patents

Abstract

The application provides an inoculating needle, inoculating needle includes barrel, syringe needle and push rod. The cylinder body is provided with a first opening and a second opening which are opposite in the axial direction; the needle head is communicated with the first opening; the push rod is connected to the inner wall of the cylinder in a sliding mode, and the end, away from the first opening, of the push rod is exposed out of the second opening; wherein the inner diameter of the needle head is 0.2 mm-0.3 mm. The application provides an inoculation needle's syringe needle's internal diameter is great, can reduce the velocity of flow of blood in the syringe needle to blood velocity of flow is the too fast problem that leads to the erythrocyte rupture in the time of can improving suction blood, and, behind the circulation cross-section grow of syringe needle, the squeezing action between erythrocyte and the syringe needle alleviates, thereby further alleviates because the rupture phenomenon of the erythrocyte that squeezing action caused.

Description

Inoculation needle

Technical Field

The application relates to the technical field of medical equipment, in particular to an inoculating needle.

Background

Chromosome examination is a basic technology of cytogenetic examination, is also a golden standard for diagnosing chromosomal disorders, and is widely applied to a plurality of research fields of reproductive medicine, obstetrics and gynecology, oncology, hematology and the like. However, chromosome culture and preparation operations are complicated and long in time, so that the requirements on collection, aseptic operation and vessels of chromosome specimens are strict. The chromosome specimen is collected to ensure the successful culture and preparation of the chromosome.

The inoculation needle used for inoculation at present is inconvenient to suck, so that red blood cells in a specimen are easy to break to cause hemolysis, and the chromosome specimen culture fails.

Therefore, there is a need for a new inoculating needle that solves the above problems.

SUMMERY OF THE UTILITY MODEL

The inoculating needle provided by the embodiment of the application can reduce the risk of erythrocyte rupture.

Embodiments of one aspect of the present application provide an inoculating needle, comprising: a cylinder having a first opening and a second opening opposed in an axial direction;

the needle head is communicated with the first opening;

the push rod is connected to the inner wall of the cylinder in a sliding mode, and the end, away from the first opening, of the push rod is exposed out of the second opening;

wherein the inner diameter of the needle head is 0.2 mm-0.3 mm.

According to one aspect of the present application, in any one of the embodiments, the length of the needle in the axial direction of the barrel is L, the inner diameter of the needle is D, and L and D satisfy: L/D is more than or equal to 133 and less than or equal to 225.

According to one aspect of the present application, in any one of the previous embodiments, the needle has a length of 4 cm to 4.5 cm.

According to an aspect of this application, in any of the previous embodiments, the barrel and the needle are integrally formed.

According to one aspect of this application in any of the preceding embodiments, the volume of the cartridge is 1.2ml to 2ml.

According to one aspect of the present application, in any one of the embodiments described above, the inoculating needle further comprises a connecting tube, the connecting tube comprising a first end and a second end opposite to each other in the axial direction of the connecting tube, the first end being wrapped around the needle head, and the second end being wrapped around the first opening; the connecting pipe still includes the pipe body and connects in the annular guide structure of pipe body inner wall, and annular guide structure's one end is connected in the inner wall of pipe body, and the other end is connected in the barrel and is formed first open-ended internal surface.

In accordance with an aspect of this application, in any of the preceding embodiments, the needle further comprises a buffer layer disposed on an inner surface of the needle.

According to one aspect of the present application in any of the previous embodiments, the cushioning layer is coated on the end of the needle facing away from the barrel.

According to an aspect of this application, in any one of the previous embodiments, the cushioning layer is a silicone coating or a rubber coating.

In accordance with one aspect of the present application, in any one of the preceding embodiments, the needle and the barrel are of plastic material.

The application provides an inoculation needle's syringe needle's internal diameter is great, can reduce the velocity of flow of blood in the syringe needle to blood velocity of flow is too fast when can improving the suction blood leads to the problem that red blood cell breaks. Furthermore, after the flow cross section of the needle head is enlarged, the extrusion action between the red blood cells and the needle head is reduced, thereby further reducing the rupture phenomenon of the red blood cells caused by the extrusion action. The internal diameter of the needle head is set to be less than or equal to 0.3 mm, the flow is easy to control, and the use is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural view of an inoculating needle provided by the embodiment of the application;

FIG. 2 is a schematic view of a portion of the tip of the inoculating needle of FIG. 1;

FIG. 3 is a schematic view of another configuration of an inoculating needle provided by the embodiments of the present application.

Description of reference numerals:

100. an inoculating needle;

1. a cylinder body; 11. a first opening; 12. a second opening; 13. a first tube section; 14. a second tube section;

2. a needle head; 21. a buffer layer; D. the inside diameter of the needle; l, the length of the needle head;

3. a push rod;

4. a connecting pipe; 41. a first end; 42. a second end; 43. a tube body; 44. and an annular guide structure.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

The prior art is used for the inoculating needle of chromosome inspection, and the suction is inconvenient, and the suction is too fast moreover and easily produces the hemolysis phenomenon, leads to chromosome specimen culture failure. Accordingly, the present application provides an inoculating needle.

For a better understanding of the technical solutions and effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of an inoculating needle provided by the embodiment of the application; FIG. 2 is a schematic view of a portion of the tip of the inoculating needle shown in FIG. 1.

Referring to fig. 1 and 2 together, an embodiment of an aspect of the present application provides an inoculating needle 100, the inoculating needle 100 comprising: barrel 1, needle 2 and plunger 3. The barrel 1 is provided with a first opening 11 and a second opening 12 which are opposite in the axial direction, and the needle 2 is communicated with the first opening 11; the push rod 3 is connected with the inner wall of the cylinder body 1 in a sliding way, and the end part of the push rod 3 departing from the first opening 11 is exposed out of the second opening 12; wherein the inner diameter D of the needle 2 is 0.2 mm-0.3 mm.

Note that the inner diameter D refers to the diameter of the inner circle in the circular cross section of the needle 2 in the longitudinal direction.

In the inoculating needle 100 provided by the present application, the inner diameter D of the needle head 2 is greater than or equal to 0.2 mm, and compared with the needle head of the existing inoculating needle, the inner diameter D of the needle head 2 of the present application is larger, so the flow section of blood in the needle head 2 is larger, and according to the continuity theorem, the flow rate of fluid in the same flow tube is inversely proportional to the cross section area through which the fluid flows, that is, the flow rate of blood in the flow section is small. Therefore, the inoculating needle 100 provided by the present application can improve the problem of rupture of red blood cells caused by too high blood flow rate when blood is sucked. Furthermore, when the flow cross section of the needle 2 is increased, the pressing action between the red blood cells and the needle 2 is reduced, thereby further reducing the rupture of the red blood cells.

The inventors have found that when the inner diameter of the needle 2 is greater than 0.3 mm, it is inconvenient for medical staff or other operators to control the aspiration flow, resulting in inconvenience in use. In view of this, setting the inner diameter D of the needle 2 to be less than or equal to 0.3 mm makes it easy to control the flow rate and convenient to use.

The inoculating needle 100 provided by the present application can be suitably used in cases where the culture of peripheral blood, umbilical cord blood and bone marrow chromosomes is required, such as chromosome examination before embryo implantation, prenatal diagnosis of umbilical cord blood chromosome examination, blood disease chromosome examination, and genetic disease chromosome examination.

In an alternative embodiment, the inoculating needle 100 further comprises a needle cap, which is sleeved on the needle 2, the needle cap can keep the needle 2 clean, so as to avoid cross infection caused by contamination of the inoculating needle 100, and the needle cap can prevent the needle 2 from being bent or damaged in the transportation or storage process. Moreover, after the inoculating needle 100 is used, the medical staff can sleeve the needle head cap on the needle head 2 again, so that the sharp part can be prevented from accidentally injuring other people, the safety of subsequent cleaning staff for treating medical waste is improved, and the safety accident caused by the medical waste is reduced. Optionally, the needle cap is of plastic material.

Optionally, the push rod 3 includes a piston and a piston rod, the piston contacts with the inner wall surface of the cylinder 1 and moves along the inner wall surface of the cylinder 1, and the piston rod is fixedly connected with one side of the piston far away from the needle 2. Further optionally, the piston is made of rubber, and the piston rod is made of plastic.

In some alternative embodiments, the length of the needle 2 in the axial direction of the barrel 1 is L, the inner diameter of the needle 2 is D, and L and D satisfy: L/D is more than or equal to 133 and less than or equal to 225.

The inventor finds that when the L/D is less than 133 under the premise that the inner diameter meets 0.2 mm-0.3 mm, the needle head is short, and the extraction is inconvenient. When the L/D is more than 225, the needle is longer, the moving path of blood is longer, and the time for drawing and injecting is longer. In view of this, the inventors have made L and D satisfy 133. Ltoreq. L/D. Ltoreq.225, and have made it possible not only to improve the convenience of withdrawal of the inoculating needle 100 but also to shorten the operating time.

In some alternative embodiments, the length of the needle 2 is 4 cm to 4.5 cm.

In these alternative embodiments, the length of the needle 2 is greater than or equal to 4 cm, and the longer needle 2 can be easily inserted into an anticoagulation tube for extraction. The length of the needle head 2 is less than or equal to 4.5 cm, so that the material consumption can be reduced, and the problems of inconvenient extraction and long operation time caused by the overlong needle head 2 can be avoided.

In some alternative embodiments, the barrel 1 and the needle 2 are integrally formed.

In these alternative embodiments, the barrel 1 and the needle 2 are integrally formed, so that the stability of the connection between the barrel 1 and the needle 2 can be improved, the separation and looseness of the barrel 1 and the needle 2 can be reduced, and the leakage between the barrel 1 and the needle 2 can be avoided.

In some alternative embodiments, the cartridge 1 has a volume of 1.2ml to 2ml.

In these alternative embodiments, a cartridge 1 having a volume of 1.2ml to 2ml may be suitable for inoculation of chromosome specimen cultures such as peripheral blood, umbilical cord blood, and bone marrow, and the like. Optionally, four large scales of 0.5ml,1.0ml,1.5ml and 2.0ml can be arranged on the outer wall surface of the cylinder body 1, and a small scale of 0.1ml can be arranged in each large scale.

Referring to FIG. 3, FIG. 3 is a schematic view of another structure of an inoculating needle provided by the embodiment of the present application.

In some alternative embodiments, the inoculating needle 100 further comprises a connecting tube 4, the connecting tube 4 comprises a first end 41 and a second end 42 opposite to each other in the self-axial direction, the first end 41 covers the needle head 2, and the second end 42 covers the first opening 11; the connection pipe 4 includes a pipe body 43 and an annular guide structure 44 connected to an inner wall of the pipe body 43, and one end of the annular guide structure 44 is connected to the inner wall of the pipe body 43 and the other end is connected to an inner surface of the cylinder 1 forming the first opening 11.

In these alternative embodiments, the inoculating needle 100 includes a connecting tube 4, with the first end 41 and the second end 42 of the connecting tube 4 respectively covering the needle 2 and the barrel 1. Since the wall of the barrel 1 forming the first opening 11 is generally thick, red blood cells entering the connecting tube 4 from the needle 2 will collide with the end face of the wall and break, and since the other end of the annular guide structure 44 is connected to the inner surface of the barrel 1 forming the first opening 11, blood sucked by the needle 2 can smoothly flow into the barrel 1 along the inner surface of the annular guide structure 44, and the risk of red blood cell collision and breakage is reduced. Optionally, the needle 2 and the barrel 1 are arranged separately.

Alternatively, the annular guide structure 44 may gradually decrease in size in the direction from the first end 41 to the second end 42. Further alternatively, the annular guide structure 44 is circular in cross-section in the direction from the first end 41 to the second end 42.

The shape of the annular guide structure 44 is not limited in the embodiment of the present application, but needs to satisfy the avoidance function of the side wall forming the first opening 11 of the cylinder 1.

Optionally, the barrel 1 comprises a first section 13 and a second section 14 in communication, the first section 13 being at least partially enclosed within the second end 42 of the connector 4, and one end of the annular guide structure 44 being connected to the first section 13 to form an inner surface of the first section 13. Optionally, the volume of the second tube section 14 is larger than the volume of the first tube section 13, and a plurality of graduation marks can be arranged on the outer surface of the second tube section 14.

As a further alternative, referring to fig. 1, the first tube section 13 includes a first opening 11, the first tube section 13 is connected to the needle 2 through the first opening 11, the second tube section 14 includes a second opening 12, and the push rod 3 is exposed from the second opening 12 of the second tube section 14 and can move along the inner surface of the second tube section 14.

Further alternatively, the inner surface of the second end 42 of the connecting tube 4 and the outer surface of the first tube section 13 may be provided with mutually cooperating threads, and the connecting tube 4 and the first tube section 13 may be threadedly connected. Alternatively, the connecting tube 4 and the first tube section 13 may be sealingly connected by a sealing gasket, thereby preventing leakage.

In some alternative embodiments, needle 2 further comprises a buffer layer 21, buffer layer 21 being disposed on the inner surface of needle 2.

In these alternative embodiments, the buffer layer 21 is disposed on the inner surface of the needle 2, and the buffer layer 21 can reduce the stress on the inner surface of the needle 2 to buffer the blood, so as to reduce the condition that the red blood cells are not uniformly stressed to cause the red blood cells to rupture.

When the buffer layer 21 is provided, the inner diameter of the needle 2 refers to the size of the space surrounded by the buffer layer 21.

Optionally, syringe needle 2 can also be including the slope section and the pipe section that are linked together, and the slope section is used for drawing blood, and the slope section of syringe needle 2 has increased the area of contact with blood, and it is comparatively laborsaving to draw. The inner diameter of the tube segment is 0.2 mm to 0.3 mm.

In alternative embodiments, the buffer layer 21 covers the end of the needle 2 facing away from the barrel 1. So arranged, the possibility that the needle 2 pierces the red blood cells can be reduced, and the risk of red blood cell rupture can be reduced.

In some alternative embodiments, the buffer layer 21 is a silicone coating or a rubber coating.

In these alternative embodiments, silicone-coated or rubber-coated cushioning layer 21 has a high surface finish to reduce the friction of blood on the inner surface of cushioning layer 21, and silicone-coated or rubber-coated cushioning layer 21 also facilitates the storage of needle 2.

In some alternative embodiments, the needle 2 and barrel 1 are of plastics material.

In these alternative embodiments, the needle 2 is made of plastic, which has a lower risk of puncturing erythrocytes than metal, and can avoid being discarded in a trash can or accidentally injuring others when in use, and the needle 2 and the barrel 1 are made of plastic, which can reduce the manufacturing cost and lower the disposal cost of medical waste.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention, and these modifications or substitutions are intended to be included in the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An inoculating needle, comprising:

a cylinder having a first opening and a second opening that are opposite in an axial direction;

the needle head is communicated with the first opening;

the push rod is connected to the inner wall of the cylinder in a sliding mode, and the end, away from the first opening, of the push rod is exposed out of the second opening;

wherein the inner diameter of the needle head is 0.2 mm-0.3 mm.

2. The inoculating needle as claimed in claim 1, wherein the length of the needle head in the axial direction of the barrel is L, the inner diameter of the needle head is D, and L and D satisfy: L/D is more than or equal to 133 and less than or equal to 225.

3. The inoculating needle as claimed in claim 1, wherein the length of the needle head is 4 cm-4.5 cm.

4. The inoculating needle as recited in claim 1, wherein the barrel and the needle are integrally formed.

5. An inoculating needle as claimed in claim 1, in which the barrel has a volume of 1.2ml to 2ml.

6. An inoculating needle as claimed in claim 1, further comprising a connecting tube, the connecting tube comprising a first end and a second end opposite in its own axial direction, the first end covering the needle head and the second end covering the first opening;

the connecting pipe still includes the pipe body and connect in the annular guide structure of pipe body inner wall, the one end of annular guide structure connect in the inner wall of pipe body, the other end connect in the barrel forms first open-ended internal surface.

7. The inoculating needle as recited in claim 1, wherein the needle tip further comprises a cushioning layer disposed on an inner surface of the needle tip.

8. An inoculating needle as claimed in claim 7, in which the buffer layer is coated on the end of the needle facing away from the barrel.

9. An inoculating needle as claimed in claim 7 or 8, characterised in that the buffer layer is a silicone or rubber coating.

10. The inoculating needle as claimed in claim 1, wherein the needle head and barrel are of plastics material.

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