A new type of embryo transfer gun for cattle that can bend and extend along with the uterine horn

Abstract

The invention discloses a novel embryo transplant gun for cattle which can bend and extend forward along with the uterine horn, and relates to the field of embryo transplant guns. The invention comprises a gun barrel, a gun core and a culture fluid capillary, wherein the culture fluid capillary is matched and installed in a barrel hole at the inner end of the gun barrel, a piston is arranged in the culture fluid capillary, the gun core is arranged in the gun barrel, and the gun barrel also comprises an inflatable part, a hollow steel needle and an extension catheter, wherein the extension catheter is a hose with a hollow interior. The invention pushes the embryo in the capillary into the extension catheter through the piston, and then pierces the piston through the hollow steel needle to communicate with the inner cavity of the capillary, an operator pushes the piston handle of the syringe to allow the gas in the syringe to enter the extension catheter through the hollow steel needle, and relies on the gas to inject the embryo in the extension catheter into the uterine horn of the cattle, thereby solving the problem that the gun core cannot inject the embryo into the uterus after the capillary is connected to the extension catheter, and the operator does not need to grab the front end of the uterine horn, thereby greatly reducing the operating difficulty, facilitating the use of the operator, and indirectly improving the conception rate.

Description

Technical Field

[0001] The invention belongs to the field of embryo transplant guns, and in particular relates to a novel embryo transplant gun for cattle which can bend and extend forward along with the uterine horn. Background Art

[0002] Since cattle have high economic value, are single-birth animals, have a small number of litters, a long reproductive cycle, and no seasonal reproduction, the entire process of embryo transplantation can be performed without surgery, and donor cattle can be used repeatedly, the embryo transplantation technology of cattle has developed relatively quickly. This technology can greatly increase the number of offspring of good-quality cows, and has broad application prospects in the current situation of a shortage of high-yield dairy cows and purebred beef cattle in my country.

[0003] At present, when performing embryo transplantation in cattle, operators often use a linear rigid embryo transplantation gun. When performing embryo transplantation, the operator needs to reach into the rectum of the cow, grab the uterus, lift the cervix and keep it straight to facilitate the entry of the transplantation gun, and further grab the uterine horn to keep it straight. The transplantation gun is extended as far as the front end (deep part) of the uterine horn to inject the embryo into the uterus.

[0004] However, we have noticed that many operators have some problems in the operation of artificial insemination of cattle, such as:

[0005] 1. The embryo transfer gun may easily puncture the cervix and cause bleeding due to improper operation;

[0006] 2. Since the cow's uterus has a certain gravity and it is very difficult to grab it in the rectum, the uterus is easy to fall out of the hand, which will directly reduce the conception rate, affect the fertility rate of cows and the survival rate of calves, thus bringing inconvenience to users.

[0007] Therefore, we proposed a new type of bovine embryo transfer gun that can bend and extend along with the uterine horn to solve the above problems. Summary of the invention

[0008] Aiming at the problems that the insemination gun currently used by operators is inconvenient to operate, time-consuming and labor-intensive, and easily causes harm to cattle, thus affecting the fertility rate of cattle and the survival rate of calves, the present invention provides a novel embryo transplant gun for cattle that can bend and extend forward along with the uterine horn.

[0009] The solution adopted by the present invention to solve its technical problems is: a new type of embryo transplant gun for cattle that can bend and extend forward with the uterine horn, including a gun barrel, a gun core and a culture fluid capillary, the culture fluid capillary is matched and installed in the inner end barrel hole of the gun barrel, a piston is arranged in the culture fluid capillary, the gun core is arranged in the gun barrel, and also includes an inflatable part, a hollow steel needle and an extension catheter, the extension catheter is a hose with a hollow interior, the extension catheter is detachably installed on the inner end head of the culture fluid capillary, the diameter of the hollow steel needle is smaller than the diameter of the piston, the hollow steel needle can slide along the gun barrel and pierce the piston to communicate with the inner cavity of the culture fluid capillary after the gun core is extracted, the inflatable part is connected to the outer end of the hollow steel needle so that gas can enter the culture fluid capillary through the airway of the hollow steel needle to push out the liquid containing the embryo.

[0010] As a preferred technical solution of the present invention, the inner end of the extension catheter is a blunt round end, and the inner diameter of the extension catheter is the same as the inner diameter of the culture fluid tube.

[0011] As a preferred technical solution of the present invention, a butt joint is installed at the connecting end of the extension catheter, and a culture fluid capillary is matched and inserted in the butt joint.

[0012] As a preferred technical solution of the present invention, the inflatable component is a syringe, the air outlet end of the syringe is equipped with a docking joint, and the outer end of the hollow steel needle is matched and inserted into the docking joint.

[0013] As a preferred technical solution of the present invention, the piston is made of rubber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention pushes the embryo in the capillary into the extension catheter through the piston, and then pierces the piston through the hollow steel needle to communicate with the inner cavity of the capillary. The operator pushes the piston handle of the syringe to allow the gas in the syringe to enter the extension catheter through the hollow steel needle, and relies on the gas to inject the embryo in the extension catheter into the uterine horn of the cow, thereby solving the problem that the gun core cannot inject the embryo into the uterus after the capillary is connected to the extension catheter. The operator does not need to grab the front end of the uterine horn, which greatly reduces the difficulty of operation, facilitates the use of the operator, and indirectly improves the conception rate.

[0016] 2. The present invention provides an extension catheter. The operator slowly places the gun barrel, the culture medium tube and the extension catheter into the shallow part of the cow's uterine angle. Since the extension catheter is a soft tube and the inner end is a blunt round head, the extension catheter can enter the deep part of the uterine horn along the curvature of the uterine horn, avoiding scratching the endometrium of the uterine horn, causing damage, and causing reproductive tract diseases, thereby ensuring the health of the cow and improving embryo implantation and pregnancy rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the front view structure of the gun core state used in the present invention;

[0018] Figure 2 This is a schematic diagram of a partial cross-sectional structure of the present invention when a hollow steel needle is used;

[0019] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0020] Figure 4 It is a schematic diagram of a three-dimensional enlarged structure of the extension catheter of the present invention;

[0021] Figure 5 This is a schematic diagram of an enlarged front view cross section of the culture liquid capillary of the present invention;

[0022] Figure 6 This is a schematic diagram of a three-dimensional enlarged structure of a hollow steel needle according to the second embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the front view structure of the hollow steel needle in Example 3 of the present invention.

[0024] In the figure: 1 gun barrel, 2 gun core, 3 culture medium capillary, 301 piston, 41 connecting tube, 42 extension catheter, 5 hollow steel needle, 501 spiral pattern, 502 positioning sleeve, 6 connectors, 7 syringe. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1-7 The present invention provides a technical solution for a novel embryo transplant gun for cattle that can bend and extend along with the uterine horn:

[0027] Embodiment 1:

[0028] according to Figure 1-5 As shown, it includes a gun barrel 1, a gun core 2 and a culture fluid tube 3. The culture fluid tube 3 is matched and installed in the inner end tube hole of the gun barrel 1. A piston 301 is arranged in the culture fluid tube 3. The piston 301 is made of rubber. The gun core 2 is arranged in the gun barrel 1. The piston 301 is pushed by the gun core 2, and then the embryo in the culture fluid tube 3 can be pushed into the extension catheter 42.

[0029] The apparatus further comprises an inflatable part, a hollow steel needle 5 and an extension catheter 42. The extension catheter 42 is a soft tube with a hollow interior. The inner end of the extension catheter 42 is a blunt round head. The inner diameter of the extension catheter 42 is the same as the inner diameter of the culture fluid tube 3. A docking tube 41 is installed at the connecting end of the extension catheter 42. By setting the docking tube 41, the culture fluid tube 3 can be easily disassembled to facilitate later replacement and disinfection. The culture fluid tube 3 is matched and inserted in the docking tube 41. By setting the extension catheter 42, the operator slowly puts the gun barrel 1, the culture fluid tube 3 and the extension catheter 42 into the shallow part of the cow's uterine horn. Since the extension catheter 42 is a soft tube and the inner end is a blunt round head, the extension catheter 42 can enter the deep part of the uterine horn along the cervix, thereby avoiding damage to the endometrium and causing reproductive tract diseases, thereby improving the embryo implantation and pregnancy rate of the cow.

[0030] The diameter of the hollow steel needle 5 is smaller than that of the piston 301. After the gun core 2 is drawn out, the hollow steel needle 5 can slide along the gun barrel 1 and pierce the piston 301 to communicate with the inner cavity of the culture fluid tube 3. The inflatable piece is connected to the outer end of the hollow steel needle 5 so that the gas can enter the culture fluid tube 3 through the airway of the hollow steel needle 5 to push out the liquid containing the embryo. The inflatable piece is a syringe 7. The air outlet end of the syringe 7 is equipped with a docking head 6. The outer end of the hollow steel needle 5 is matched and inserted in the docking head 6. The piston 301 is pierced by the hollow steel needle 5 to communicate with the inner cavity of the culture fluid tube 3. Then, the operator pushes the piston 301 handle of the syringe 7 to make the gas in the syringe 7 enter the extension catheter 42 through the hollow steel needle 5, and then the embryo in the extension catheter 42 is injected into the uterine horn of the cow by relying on the gas, thereby solving the problem that the gun core 2 cannot inject the embryo into the uterus after the traditional culture fluid tube 3 is connected to the extension catheter 42. The operator does not need to grab the front end of the uterine horn, which greatly reduces the difficulty of operation, facilitates the use of the operator, and indirectly improves the conception rate.

[0031] During specific use, the present invention provides a novel embryo transplant gun for cattle that can bend and extend along with the uterine horn. First, the operator slowly places the gun barrel 1, the culture fluid tube 3 and the extension catheter 42 into the cow's vagina. Since the extension catheter 42 is a soft tube and the inner end is a blunt round head, the extension catheter 42 can bend along the uterine horn and enter the deep part of the uterine horn. Then the operator inserts the gun core 2 into the gun barrel 1 and uses the gun core 2 to push the piston 301. Then the embryo in the culture fluid tube 3 can be pushed into the extension catheter 42. Then the gun core 2 is pulled out, and the hollow steel needle 5 is inserted into the gun barrel 1 and pushed. The hollow steel needle 5 pierces the piston 301 and communicates with the inner cavity of the culture fluid tube 3. Then the operator pushes the piston 301 handle of the syringe 7 to allow the gas in the syringe 7 to enter the extension catheter 42 through the hollow steel needle 5. Then the embryo in the extension catheter 42 is injected into the uterine horn of the cattle by relying on the gas. Finally, the gun barrel 1, the culture fluid tube 3 and the extension catheter 42 are slowly taken out to complete the embryo transplantation operation.

[0032] Embodiment 2:

[0033] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 6 As shown, the front section of the hollow steel needle 5 is provided with a spiral pattern 501. By providing the spiral pattern 501, the operator can rotate the hollow steel needle 5 and pierce the piston 301 while rotating, which further facilitates the operation of the operator.

[0034] Embodiment three:

[0035] Based on the first embodiment, the same points as the first embodiment will not be repeated here, and the differences are as follows: Figure 7 As shown, the outer wall of the hollow steel needle 5 is covered with two positioning sleeves 502, and the positioning sleeves 502 match the inner wall of the gun barrel 1. By setting the positioning sleeves 502, the hollow steel needle 5 can accurately pierce from the axis of the piston 301, avoiding the problem of the hollow steel needle 5 being pierced crookedly.

[0036] Embodiment 4:

[0037] On the basis of Example 1, the similarities between this embodiment and Example 1 are not repeated here, and the differences are as follows: a protective sleeve is provided on the outer side of the gun barrel 1, and the protective sleeve is a silicone sleeve, and the inner end of the protective sleeve is a blunt round head. By providing the protective sleeve, the hard gun barrel 1 is prevented from causing damage to the cervix when the steel needle enters the cervix, thereby protecting the cow's body.

Claims

1. A new type of embryo transfer gun for cattle that can bend and extend with the uterine horn, comprising a gun barrel, a gun core and a culture fluid capillary, wherein the culture fluid capillary is matched and installed in the inner end barrel hole of the gun barrel, a piston is arranged in the culture fluid capillary, and the gun core is arranged in the gun barrel, characterized in that: It also includes an inflatable piece, a hollow steel needle and an extension catheter, wherein the extension catheter is a hose with a hollow interior, and the extension catheter is detachably mounted on the inner end of the culture fluid capillary, the diameter of the hollow steel needle is smaller than the diameter of the piston, and a spiral pattern is provided on the front section of the hollow steel needle, and the hollow steel needle can slide along the gun barrel and pierce the piston to communicate with the inner cavity of the culture fluid capillary after the gun core is pulled out, and the outer wall of the hollow steel needle is covered with two positioning sleeves, and the positioning sleeves match the inner wall of the gun barrel, and by providing the positioning sleeves, the hollow steel needle can accurately pierce the piston from the axis center, and the inflatable piece is connected to the outer end of the hollow steel needle so that the gas can enter the culture fluid capillary through the airway of the hollow steel needle to push out the liquid containing the embryo.

2. The novel embryo transfer gun for cattle that can bend and extend along with the uterine horn according to claim 1 is characterized in that: The inner end of the extension catheter is a blunt round end, and the inner diameter of the extension catheter is the same as the inner diameter of the culture fluid capillary.

3. The novel embryo transfer gun for cattle that can bend and extend along with the uterine horn according to any one of claims 1-2, characterized in that: A butt joint is installed at the connection end of the extension conduit, and a culture fluid capillary is matched and inserted in the butt joint.

4. The novel embryo transfer gun for cattle that can bend and extend along with the uterine horn according to claim 1, characterized in that: The inflatable component is a syringe, the air outlet end of the syringe is equipped with a docking head, and the outer end of the hollow steel needle is matched and inserted into the docking head.

5. The novel embryo transfer gun for cattle that can bend and extend along with the uterine horn according to claim 1 is characterized in that: The piston is made of rubber.

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