CN211187277U

CN211187277U - Domestic rabbit heart blood sampling device for multi-functional experiments

Info

Publication number: CN211187277U
Application number: CN201921077564.XU
Authority: CN
Inventors: 杨青; 杨晓彬; 姬志林
Original assignee: Chuxiong Medical College
Current assignee: Chuxiong Medical College
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-08-07
Anticipated expiration: 2029-07-11

Abstract

The utility model discloses a rabbit heart blood sampling device for multi-functional experiments, including the syringe needle, the syringe needle includes the needle body, sets firmly in the needle point on needle body top, sets firmly in the connector of needle body bottom, still include with needle body outer fringe sliding fit's position sleeve, the one end of the nearly needle point of position sleeve is equipped with the fixed part that is far away more than the other end, the bottom of fixed part is apart from needle point 3.2 ~ 3.5cm when the position sleeve removes to connector one end. The utility model discloses there is rich experience to control the depth of needle insertion according to experiment operator, general needle insertion surpasss 3.5cm and will puncture the heart, especially the operation is too forcefully violent can be difficult to control the depth of needle insertion and puncture the heart, lead to the rabbit to be pierced through the heart or the dead not enough of lung, and pierce the heart back syringe needle and deviate from easily and the difficult problem of dislocation, but through set up sliding fit's position sleeve at the needle body, steerable degree of depth when the needle insertion and avoid piercing the heart, portable and make the fixed part support the rabbit skin tightly and avoid deviating from and misplacing with fixed needle insertion point after piercing the heart.

Description

Domestic rabbit heart blood sampling device for multi-functional experiments

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to simple structure, the depth of needle insertion is easily controlled, can avoid the syringe needle to deviate from and the dislocation, can realize taking a blood sample in succession and control the multi-functional experiment of the volume of taking a blood sample with rabbit heart blood sampling device.

Background

In animal research, medical experiments and in patient testing, blood needs to be collected for analysis. In the prior art, blood is generally collected from eyes of experimental animals, and although the amount of blood which can be collected is enough, the animals are easy to die; blood can be collected from the tail vein of the experimental animal, but the blood quantity which can be collected is small, and the blood collecting efficiency is relatively low; blood can be collected from the heart of an experimental animal, and although the amount of blood that can be collected is sufficient, the demand for a blood collecting device is high. In order to facilitate the subsequent experimental research and ensure the blood collection quantity, the heart of the animal is usually collected, and the experimental animal after blood collection needs to continue to survive.

According to the traditional rabbit heart blood sampling method, a rabbit is fixed in a supine position, the heart part is sheared and disinfected, a needle cylinder (needle head) is used for closing the 3 rd to 4 th intercostal space on the left side of a sternum and obviously beating the heart to directly penetrate into the heart of the rabbit for blood sampling, the needle head generally penetrates into the position of about 3.5cm (8-9-gauge needle head), if the needle head penetrates into the heart, blood gushes out, the needle insertion is stopped at the moment, the required blood volume is extracted, and the needle is rapidly pulled out after the completion. The above prior art, although simple and fast, has the following disadvantages:

1. since rabbits generally puncture the heart or lung by more than 3.5cm, although the heart position is relatively easy to determine, the depth of the puncture is often controlled by the operator with abundant experience, otherwise, rabbits easily puncture the heart or lung many times to cause death, and especially, the operator can puncture the heart or lung with excessive force more easily.

2. After the needle for blood collection is accurately penetrated into the heart, sometimes the needle is easy to be separated or dislocated due to improper operation of an operator or struggle of the rabbit, blood collection is affected, and even the heart or lung of the rabbit is penetrated.

3. During and after blood collection, blood is collected in a needle cylinder and stored for a period of time, the blood can be transferred to other containers after the blood is collected enough, and the physicochemical properties of the blood can be influenced more or less along with the change of time and contact media, so that the accuracy of subsequent experimental operation or experimental data can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem and not enough to prior art exist provides a simple structure, the easy control of the depth of inserting needle, can avoid the syringe needle to deviate from and the dislocation, can realize taking a blood sample in succession and control the multi-functional experiment of the volume of taking a blood sample with rabbit heart blood sampling device.

The utility model discloses a realize like this: including the syringe needle, the syringe needle includes the needle body, fixes setting up in the needle point on needle body top, fixes setting up in the connector of needle body bottom, still include with needle body outer fringe sliding fit's position sleeve, the one end that the nearly needle point of position sleeve is provided with the fixed part that is far away from the other end, the bottom of fixed part is apart from needle point top 3.2 ~ 3.5cm when the position sleeve removes to connector one end.

The utility model has the advantages that:

1. the utility model discloses when taking a blood sample to rabbit heart among the prior art, experiment operator must have abundant experience could control the depth of needle insertion, general needle insertion surpasss 3.5cm and will puncture the heart, especially the operation is too forcefully violent can the uncontrollable depth and puncture the heart, lead to the rabbit to be pierced through the heart or the dead not enough of lung, but set up sliding fit's position sleeve in the outer fringe of needle body, the characteristics to the rabbit heart blood sampling needle insertion depth very much, the bottom of fixed part is apart from needle point top 3.2 ~ 3.5cm when making the position sleeve remove to connector one end, thereby can control the depth when the needle insertion, especially can prevent that the operator is too violent and puncture the heart, thereby improve experiment rabbit's survival rate.

2. The inner edge of the positioning sleeve of the utility model is an elastic hollow elliptical structure, thereby the minor axis diameter can be increased when the major axis direction is extruded by external force, the outer edge of the needle body can be freely moved, and the positioning is realized by the outer edge of the clamping needle body which is clamped by the elastic restorable self to the minor axis direction inner edge after the external force is removed, and the whole structure is simple and reliable.

3. The utility model discloses after the needle pierces the heart among the prior art when the rabbit heart is taken a blood sample, the syringe needle is because of improper operation of operator or struggle of rabbit and is deviate from and the reality of dislocation easily, but set up the position sleeve sliding fit in the outer fringe of needle body, make the position sleeve have the resistance when the relative needle body slides, prevent the position sleeve free slip on the needle body, thereby can make the position sleeve can remove to the fixed part support tight rabbit skin after piercing the heart, make the syringe needle remain throughout and upright be difficult for the state of rocking in order to avoid deviating from and the dislocation, and can also prevent that the blood when taking a blood sample from pricking some outflow.

4. The utility model discloses a three-way valve and blood collection device intercommunication are connected to the connector of syringe needle, perhaps through heparin tube and vacuum hemostix intercommunication, can avoid the tradition to gather the difficult problem that the back shifts the easy pollution that causes, the ageing weak, the difficult control volume of taking a blood sample from the cylinder to can effectively reduce the time and the accurate control volume of taking a blood sample that blood is detained, with the accuracy that increases the experimental result and can realize continuous, intermittent different mode blood sampling, adapt to the blood sampling requirement of different experiments.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a cross-sectional view of the needle body and the positioning sleeve of FIG. 1;

FIG. 3 is a schematic view of the retaining sleeve of FIG. 1;

FIG. 4 is a schematic view of the connection structure between the three-way valve and the present invention;

FIG. 5 is a schematic view of the connection structure of the blood collection device of the present invention;

in the figure: 1-needle head, 101-needle body, 102-needle tip, 103-connector, 2-positioning sleeve, 201-fixing part, 202-platform part, 3-three-way valve, 4-blood collecting device, 5-blood collecting tube, 6-vacuum hemostix, 8-rabbit heart and 9-rabbit skin.

Detailed Description

The present invention is further described with reference to the following drawings and examples, but the present invention is not limited thereto in any way, and any modification or improvement based on the teaching of the present invention is within the protection scope of the present invention.

As shown in fig. 1 to 5, the utility model discloses a syringe needle 1, the syringe needle includes needle body 101, fixed setting in needle point 102 on needle body 101 top, fixed setting in the connector 103 of needle body 101 bottom, still include with needle body 101 outer fringe sliding fit's position sleeve 2, the one end of the 2 nearly needle points 102 of position sleeve is provided with the fixed part 201 that is far away from the other end, the bottom of fixed part 201 is apart from 3.2 ~ 3.5cm on needle point 102 top when position sleeve 2 removes to connector 103 one end.

As shown in fig. 2, the inner edge of the positioning sleeve 2 is an elastic hollow elliptical structure, and the minor axis diameter m of the inner edge of the positioning sleeve 2 is not greater than the diameter D of the needle body 101 and the major axis diameter n is greater than the diameter D of the needle body 101.

The outer edge of the locating sleeve 2 is provided with platform parts 202 which are vertical to the long shaft at two ends corresponding to the long shaft at the inner edge.

The fixing portion 201 is an integral flange platform-shaped structure or an integral bell mouth-shaped structure perpendicular to the needle body 101, or the fixing portion 201 is a flange platform-shaped structure or a bell mouth-shaped structure perpendicular to the needle body 101 and divided into at least two parts.

At least the fixing part 201 of the positioning sleeve 2 is of a transparent silica gel structure, a transparent plastic structure or a thin-wall stainless steel structure.

As shown in FIG. 1, the tip 102 is a beveled, rounded configuration.

A flat needle handle is fixedly arranged on one side of the needle body 101 close to the connector 103.

As shown in fig. 4 and 5, the connector 103 of the needle 1 is connected to the blood collection device 4 through the three-way valve 3, or connected to the three-way valve 3 or the vacuum blood collection device 6 through the blood collection tube 5.

As shown in fig. 4, the first port of the three-way valve 3 is communicated with the connector 103 and at least the second port or the third port is communicated with the blood collection device 4, and the second port or the third port of the three-way valve 3 which is not connected with the blood collection device 4 is blocked by a plug.

An adjusting switch is arranged on the blood collection tube 5.

The utility model discloses a theory of operation and working process:

the utility model discloses when taking a blood sample to the rabbit heart among the prior art, the experiment operator must have abundant experience can control the depth of needle insertion, generally the needle insertion surpasss 3.5cm and will puncture the heart, especially the operation is too forcefully violent and can be difficult to control the depth and puncture the heart, lead to the rabbit to be impaled the heart or the dead not enough of lung, but set up sliding fit's position sleeve in the outer fringe of needle body, especially to the characteristics of rabbit heart blood sampling needle insertion depth, the bottom of fixed part is 3.2 ~ 3.5cm apart from the needle point top when making the position sleeve move to connector one end, thereby can control the depth when the needle insertion, especially can prevent that the operator is too forcefully violent and punctures the heart, thereby improve the survival rate of experiment rabbit; to among the prior art rabbit heart blood sampling needle pierce the heart after, the syringe needle is because of improper operation of operator or the reality of struggling and deviate from and misplacing of rabbit easily, but set up in the outer fringe of needle body with position sleeve sliding fit, make the position sleeve have the resistance when needle body slides relatively, prevent that the position sleeve from freely sliding on the needle body, thereby can make the position sleeve can make and move to the fixed part and support tight rabbit skin after piercing the heart, make the syringe needle keep upright difficult state of rocking all the time in order to avoid deviating from and misplacing, and can also prevent that the blood when taking a blood from piercing some outflow. Furthermore, the inner edge of the positioning sleeve is of an elastic hollow elliptical structure, the minor axis diameter m of the inner edge of the positioning sleeve is not more than the diameter D of the needle body, the major axis diameter n of the inner edge of the positioning sleeve is more than the diameter D of the needle body, the minor axis diameter can be increased when the external force extrudes the major axis direction, so that the inner edge of the positioning sleeve can freely move along the outer edge of the needle body, the outer edge of the needle body can be clamped by the inner edge of the minor axis direction to realize positioning by means of self elasticity. Furthermore, the needle point is of a beveled flat round structure, so that the damage to the experimental rabbit can be effectively reduced, and the lethality of the experimental rabbit can be effectively reduced. Still further, connect three-way valve and blood collection device intercommunication through the connector of syringe needle, perhaps communicate through heparin tube and vacuum hemostix, can avoid the tradition to gather the easy difficult problem that pollutes, the ageing weak, the difficult control volume of taking a blood sample that the back transfer caused from the cylinder to can effectively reduce the time and the accurate control volume of taking a blood sample that blood is detained, with the blood sampling requirement that increases the accuracy of experimental result and satisfy different experiments. Further, the first port of the three-way valve communicates with the connector and at least the second port or the third port communicates with the blood collection device, thereby having the ability to connect one or two blood collection devices as needed, improving flexibility of use. To sum up, the utility model has the characteristics of simple structure, the easy control of the depth of needle insertion, can avoid the syringe needle to deviate from and the dislocation, can realize taking a blood sample in succession and control the volume of taking a blood sample.

As shown in fig. 1 to 4, in use, the blood collection device 4 is connected to one port of the three-way valve 3, the other port of the three-way valve 3 is connected to the connector 103 of the needle 1 directly or through the blood collection tube 5, and the remaining ports of the three-way valve 3 which are not connected are plugged by plugs.

The rabbit is fixed in a supine position, the heart part is sheared and disinfected, and meanwhile, the positioning sleeve 2 is moved to one end of the connector 103, so that the distance between the bottom end of the fixing part 201 and the top end of the needle point 102 is not more than 3.2-3.5 cm. Then, the needle handle is held by hand to close the 3 rd to 4 th intercostal and heart beat obvious part on the left side of the sternum, the needle point 102 is made to penetrate deeply into the 3.5cm (No. 8 or No. 9 needle), and blood will flow out when the needle is penetrated into the heart 8 of the rabbit. Fixed syringe needle 1 on one hand this moment, another hand is held between the fingers the platform portion 202 of position sleeve 2 and is made it elastic deformation and follow needle body 101 lapse, makes the fixed part 201 bottom of position sleeve 2 support tightly the rabbit and make it fix syringe needle 1, then opens the port switch that the three-way valve 3 that is linked together with blood collection device 4 corresponds, the me needs to extract required blood volume, pulls out the needle rapidly after the completion.

Claims

1. The utility model provides a multi-functional rabbit heart blood sampling device for experiments, includes syringe needle (1), the syringe needle includes needle body (101), fixed set up in needle point (102) on needle body (101) top, fixed connector (103) that set up in needle body (101) bottom, its characterized in that still includes with needle body (101) outer fringe sliding fit's position sleeve (2), the one end of position sleeve (2) nearly needle point (102) is provided with fixed part (201) that is greater than the other end, the bottom of fixed part (201) is apart from needle point (102) top 3.2 ~ 3.5cm when position sleeve (2) remove to connector (103) one end.

2. The multifunctional rabbit heart blood sampling device for experiments according to claim 1, wherein the inner edge of the positioning sleeve (2) is an elastic hollow oval structure, the minor axis diameter m of the inner edge of the positioning sleeve (2) is not more than the diameter D of the needle body (101) and the major axis diameter n is more than the diameter D of the needle body (101).

3. The multifunctional rabbit heart blood sampling device for experiments according to claim 2, wherein the outer edge of the positioning sleeve (2) is provided with a platform part (202) perpendicular to the long axis at two ends corresponding to the long axis of the inner edge.

4. The multifunctional rabbit heart blood sampling device for experiments according to claim 2, wherein the fixing portion (201) is an integral flange platform-like structure or an integral bell mouth-like structure perpendicular to the needle body (101), or the fixing portion (201) is an integral flange platform-like structure or a bell mouth-like structure perpendicular to the needle body (101) and at least divided in two.

5. The multifunctional rabbit heart blood sampling device for experiments according to claim 2, wherein the positioning sleeve (2) has at least a fixing part (201) of a transparent silica gel structure, a transparent plastic structure or a thin-wall stainless steel structure.

6. The multifunctional laboratory rabbit heart blood sampling device according to claim 2, wherein said needle tip (102) is a chamfered flat circular structure.

7. The multifunctional rabbit heart blood sampling device for experiments as claimed in claim 2, wherein a flat needle handle is fixedly arranged on one side of the needle body (101) near the connector (103).

8. The multifunctional rabbit heart blood sampling device for experiments according to any one of claims 1 to 7, wherein the connector (103) of the needle (1) is connected to the blood collection device (4) through a three-way valve (3), or connected to the three-way valve (3) or the vacuum blood sampling device (6) through a blood sampling tube (5).

9. Multifunctional laboratory rabbit heart blood sampling device according to claim 8, characterized in that the first port of the three-way valve (3) is in communication with the connector (103) and at least the second or third port is in communication with the blood collection device (4), the second or third port of the three-way valve (3) not connected to the blood collection device (4) being plugged with a plug.

10. The multifunctional rabbit heart blood sampling device for experiments as claimed in claim 8, wherein the blood sampling tube (5) is provided with an adjusting switch.