JPH03247331A - Method and apparatus for excising overy of mammal - Google Patents

Abstract

PURPOSE:To achieve an excision of an overy handily and quickly without celiotomy while minimizing damage to a cow body by a method wherein an overy held with a hand in a rectum through an intestinal wall is guided to an overy storage section of an overy excising device and cut to store the overy alone into the overy storage section. CONSTITUTION:An overy excising device A inserted into a vagina through an intestinal wall with a hand in a rectum is guided. A transfixing part 2A is stuck into a vagina wall in the periphery of an external womb mouse of a cow to be handled to insert a tip of the overy excising device A, namely, the transfixing part 2A and the overy storage section 2B into the abdominal vagina. An overy held with the hand in the rectum through the intestinal wall is guided into the overy storage section 2B of the overy excising device and when an overy storage space 2a is filled fully, a handle 2D for operating of an internal tube 2 is turned to close both openings 1B and 2b so that an resecting section 5 is formed with the rims 1B' and 2b' to cut off a tissue outside the overy tying the overy to the womb. Then, the overy alone is stored into the overy storage section 2D. By repeating the same operation procedure, another overy is resected to be stored.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for removing the ovaries of a mammal, particularly a cow, and an instrument used for removing the ovaries.

(Conventional technology) Due to changes in the environment surrounding the livestock industry in recent years, including the issue of liberalization of beef imports, there is an urgent need for livestock producers to reduce the production costs of beef cattle (cost reduction). To this end, various technological developments are underway.

One of the ways to deal with this problem is to use artificial insemination and large-scale breeding methods to produce and raise high-quality beef cattle in large quantities at a low price. ■ A method of increasing cow production by in vitro fertilization using the follicular eggs contained in the cow, or ■ A method of increasing cow production by transplanting in vitro fertilized eggs from the ovaries collected from layer-killed cows, and ■ A method of multi-head fattening. Large-scale breeding methods for cows,■ In addition, methods for removing ovaries from living bodies include (surgical) methods for removing ovaries through laparotomy, methods for removing ovaries from the abdominal cavity through the vaginal wall using a finger knife, and A method of removing the ovaries using a commercially available ovarian amputation device has been proposed.

(Problems to be Solved by the Invention) However, in each of the above-mentioned conventional methods ■ to ■, ■ hormone treatment is performed on cows scheduled for stratification to promote the superovulation effect, thereby obtaining several times as many follicular eggs. Even if it is possible, it is impossible to serve the living body as meat after slaughter, and it is uneconomical. Furthermore, it has been difficult to clarify the lineage of removed ovaries due to the high pressure of slaughterhouses and the need to maintain the activity of collected ovaries.

■ The ovary of layer killing is at risk of being affected by mediated infectious diseases, genetic diseases from the mother, and vertically transmitted diseases, and it is impossible to confirm the disease status, so the current Its practical use is not permitted under the law.

■ In the multi-head breeding method, when cows are in heat, the cows may be injured due to noise, riding, and chasing each other. This has resulted in a reduction in fattening efficiency during breeding.

■ Ovarian removal through open surgery is cost-effective, time-consuming, accident-prone, and
There are problems in terms of nursing care and it is not practical. In addition, the method of removing the ovary from the abdominal cavity through the vaginal wall using a finger knife causes peritonitis and bleeding accidents due to contamination of the incision, and is not applicable to nulliparous or vaginally stenotic cows. Even when the method using a strangler was used, there were many bleeding accidents, and in addition, the problem of the ovary remaining in the abdominal cavity was pointed out.

As mentioned above, the biggest problem with each of the conventional methods is how quickly and safely the ovaries can be collected from the living body, and because this problem has not been overcome, Practical implementation of each method in breeding sites was extremely difficult and dangerous.

Therefore, there is a strong need in the industry for a method and a device for removing living ovaries from living bodies that can quickly produce offspring with excellent traits in large quantities and that are unaffected by diseases.

The present invention has been made in view of the above-mentioned problems, and has the following objects: (a) ovaries can be removed from a living body easily and quickly without laparotomy, and without causing damage to the living body; (b) By quarantining farmed cattle with a clear pedigree,
By pre-selecting cows that are free from infectious diseases and then removing their ovaries, we can ensure that offspring with superior pedigree and are unaffected by disease (C). By making it possible to remove the ovaries, cows are prevented from coming into heat, and as a result, the human burden is reduced and multiple cows are raised. It is something to do.

(Means for Solving the Problems) The present invention was invented in view of the above-mentioned problems and objects, and its gist is that one hand is inserted into the rectum (10) of a mammal, and the other hand is inserted into the rectum (10) of a mammal. Insert the ovariectomy device into the vagina (
11) and insert it into the puncture part (2A) of the oophorectomy instrument (A).
) was protruded, the vaginal wall around the external cervical os was punctured, the ovarian removal device (A) was inserted into the abdominal cavity, and the ovary was grasped through the intestinal wall with the hand inserted into the rectum (12).
Guide the ovary to the ovary storage part (2B) of the ovarian removal instrument (^), and remove the extraovarian tissue that connects the ovary stored in the ovary storage part (2B) with the uterus (13) by the resection part (5). A method for removing a pair of ovaries from a mammal, which is characterized by: cutting or crushing the ovaries, and storing only the cut ovaries in an ovary storage part (2B) of an oophorectomy instrument (A), and oophorectomy. The instrument consists of an outer tube (1) that forms the outermost shell, an inner tube (2) that is reciprocatably and rotatably stored inside the outer tube, and an ovary push rod (3) that is reciprocatably stored inside the inner tube. )
The inner tube (2) has a pointed puncture part (2A) at its tip that protrudes and retreats from the puncture opening (1A) at the tip of the outer tube (1), and an inner tube ( 2) an ovary storage part (2B) formed in the inner space and having an ovary storage space (2a) and an opening (2b) for taking in the ovary on its peripheral wall; the tip thereof communicates with the ovary storage part (2B); The device includes an extended rod portion (2C) whose rear end extends to the rear end of the instrument and has a space inside, and an inner tube operating handle (2D) formed at the rear end of this extended rod portion (2C). The outer tube (1) has a puncture opening (1^) on the distal end surface from which the puncture part (2A) protrudes.
And behind it, with the puncture part (2A) of the inner tube (2) stored in the outer tube (1), the ovary storage space (2a) of the inner tube (2) is connected to the outside of the device. An opening (1B) for taking in the ovary that matches the opening (2b) of the inner tube (2) is formed so as to communicate with the inner tube (2).
The inner wall surface (1C) of the outer tube has a thickness that is in sliding contact with the outer wall surface (2c) of the ovary storage portion (2B) in 2), and the gripping portion (1D) of the device that is formed protrudingly on the rear wall thereof. and the ovary pusher rod (3) has the ovary storage part (3) at its tip.
A piston part (3A) that reciprocates within the inner pipe (2B), and a piston part (3A) that reciprocates within the extended rod part (2C) of the inner tube (2) that is connected to the rear of the piston part (3A), 3
A) is provided with a connecting rod portion (3B) for reciprocating the tube, and the cutout portion (5) is located at the edges of both openings (1B) and (2b) of the outer tube (1) and the inner tube (2). Part (1B'), (
2b').

(Example) Hereinafter, examples of the mammalian ovariectomy method and the ovariectomy instrument of the present invention will be described in detail with reference to the drawings.

First, the configuration of the oophorectomy instrument used in the oophorectomy method of the present invention will be explained, and then the operation (function) of the instrument will be explained.
will be explained together with an example of a method for ovariectomy in mammals.

FIG. 2 is a perspective view showing the overall external configuration of the oophorectomy device according to the present invention, and FIG. 3 is a longitudinal cross-sectional view including a partially cut-off portion showing the internal structure thereof.

The oophorectomy device (A) according to this example is shown in FIGS. 2 and 3.
As shown in the figure, the outermost shell has an outer tube (1) which is a cylindrical body having an enlarged diameter portion at the tip, and the outer tube (1) is internally reciprocated and rotatable, and the tip has an enlarged diameter portion. An inner tube (2) having an enlarged diameter portion formed to correspond to the enlarged diameter portion of the outer tube (1), and an ovarian push rod (
3).

The inner tube (2) has a puncture portion (
2A) is formed, and an ovary housing part (2B) is formed in the cylindrical enlarged diameter part at the rear thereof. This ovary storage part (2B) consists of an ovary storage space (2a) formed in the space inside the cylindrical enlarged diameter part and an opening (2b) for taking in the ovary formed in the peripheral wall of the enlarged diameter part. Become. The ovary storage part (2B), that is, the ovary storage space (2a
) and the entrance part (2b) in this embodiment are set to a size that can sufficiently accommodate the ovary of a large adult cow (more precisely, the follicles that constitute the ovary), and the opening (2b) is In the example, the ovary formed in the rear part of the ovarian storage part (2B) and taken in from the opening (2b) is
) is configured to be sent to the front position side by a piston portion (3A) to be described later.

Further, at the rear of the ovary storage part (2B), there is an extension rod portion having a space inside the tip of which communicates with the ovary storage space (2a) and whose rear end extends to the rear end of the device. (2C) is formed, and this extended rod portion (2C
) is provided with an operating handle (2D
) is formed.

The outer tube (1) also has a puncture opening (1) from which the puncture portion (2A) at the tip of the inner tube (2) projects on the distal end surface.
A) is formed, and in the enlarged diameter part of the cylindrical body behind it,
An opening (1B) for taking in the ovary is formed. This opening (1B) is the puncture part (2A) of the inner tube (2).
The opening (2b) of the inner tube (2) allows the ovary storage space (2a) of the inner tube (2) to communicate with the outside of the device when the ovary is housed in the outer tube (1). They are formed in the same size at a position that matches (coincides with).

Furthermore, at the enlarged diameter portions of the cylindrical bodies of the outer tube (1) and the inner tube (2), the outer wall surface (2c) of the inner tube (2) comes into sliding contact with the inner wall surface (1C) of the outer tube (1). (The same applies in this specification, including a state of approximately sliding contact).

This configuration and the configuration in which the inner tube (2) rotates with respect to the outer tube (1) constitute a resection portion (5), and this resection portion (
5), since both openings (1B) and (2b) are aligned, the opening (2b) of the inner tube (2) is aligned with the outer tube (2b).
By shifting to a state hidden within the peripheral wall of 1), both of the openings (1B), the edge (1B') of (2b),
(2b') serve as scissor blades, and the resection part (5
).

Furthermore, in the instrument (A) according to this example, the opening (
When the edges (1B') and (2b') of 1B) and (2b) are formed with saw-blade-like unevenness in a plan view and act as a crushing effect, that is, as a resection part (5), bleeding is minimized. (See Figure 2).

Further, a gripping portion (10) for gripping the instrument during use is formed protruding from the wall surface of the rear end of the outer tube (1).

In addition, the ovary pusher rod (3) installed inside the inner tube (2)
) has a piston part (3^) formed at its tip, and this piston part (3A) is connected to the ovary storage part (2) of the inner tube (2).
2B), that is, the inside of the ovary storage space (2a), is reciprocated by operation from the rear end of this instrument. The connecting rod portion (3B) reciprocates within the extended rod portion (2C).
). That is, this connecting rod part (3B) is longer than the piston part (3B).
3A) is configured to have a length that allows it to reciprocate within the ovary storage space (2a) from the tip to the rear end, and the rear end is connected to the inner tube (2a).
2) protrudes from the rear end, and a pressing portion (3a) is formed in this portion. Therefore, by pushing and retracting the pressing part (3a), the piston part (3A) can be reciprocated from the rear end of the instrument.

In this embodiment, a flange-like protrusion (IE) is formed on the inner wall of the outer tube (1), and the protrusion (IE) and shaft are formed on the rear end of the outer wall of the inner tube (2). Steps facing in the direction (
A compression type spring (4A) is interposed between the projecting piece (IE) and the stepped part (2E), and an inner tube (2E) is formed.
) is not pressed toward the distal end, the inner tube (2) is in a retracted position with respect to the outer tube (1), that is, the puncture portion (2A
) is held so that it does not protrude from the distal end surface of the outer tube (1). Similarly, a step (2F) is formed on the inner wall of the inner tube (2), and a step (3B) is formed at the rear end of the ovary pusher rod (3) axially opposite to this step (2F). ) is formed, and a compression type spring (4B) is interposed between this stage^ff//10) μB frame 90), and the ovary pusher rod (3
) is not pressed toward the distal end, the ovarian push rod (3) is in a retracted position relative to the inner tube (2), that is,
The piston portion (3A) is held at the rear end position within the ovary storage space (2a).

Furthermore, in this embodiment, in order to prevent the pressure within the ovary storage space (2a) from changing when the piston portion (3A) reciprocates within the ovary storage space (2a),
A through hole (3C) is formed inside the piston part (3A) and the connecting rod part (3B).

Furthermore, the outer tube (1), inner tube (2), and ovary pusher rod (3) are each fitted with a plurality of pipe-shaped parts so that they can be disassembled, as shown in FIG. This structure allows for easy disinfection of the instrument and removal of dirt inside the instrument after use.

Next, regarding the usage mode of the above-mentioned oophorectomy instrument (A),
A series of procedures for removing the ovaries of a mammal (in this example, a cow) will be described.

That is, ovarian removal is specifically performed according to the following operating procedure (see the state of use diagram in FIG. 1).

1) First, remove the feces within the diameter (10) of the target cow.

2) Next, wash and disinfect the vulva of the target cow.

3) Once the above preparatory work is completed, insert one hand (generally the dominant hand) into the rectum (10) of the cow, as shown in FIG.

4) Next, as shown in FIG.
) while grasping the grip part (1D) of the ovariectomy instrument (A).
) into the vagina (11) from the vaginal opening of the target cow.

5) Guide the ovariectomy device (A) inserted into the vagina through the intestinal wall with the hand placed in the rectum.

6) When the tip of this device (A) is located around the external cervical os, push the operating handle (2D) of the inner tube (2) of this device (A) against the spring (4A) and hold it at the gripping portion. (1
D) side (the distal end side of this device (A)) and remove the outer tube (1).
from the puncture opening (1A) of the inner tube (2) to the tip puncture part (
2A) to protrude toward the vaginal wall to be punctured.

7) The protrusion of the puncture part (2A) punctures the vaginal wall around the external cervix of the target cow, and the tip of the ovariectomy instrument (A), that is, the puncture part (2A) and the ovary storage part (2B). ) is inserted into the abdominal cavity.

In the direction, the puncture part (2
A) returns to the original state.

8) In this state, the ovary (12), which is grasped through the intestinal wall with the hand inserted into the rectum, is placed in the ovary storage part (
2B) (ovary storage space (2a)).

9) When the ovary is completely accommodated in the ovary storage space (2a) of the ovary storage part (2B), rotate the operating handle (2D) of the inner tube (2) clockwise or in the direction of the half-hour hand. By closing both openings (1B), (2b) and forming the resection (5) at their edges (1B'), (2b'), the extraovarian tissue connecting the ovary to the uterus (13) is removed. The ovary is cut and only the ovary is stored in the ovary storage part (2D).

10) Next, the pressing part (3a) of the ovarian push rod (3)
is pressed against the spring (4B) toward the distal end of the instrument (A), and the ovary is placed in the ovarian housing section (2D) with the piston section (3A) at the distal end via the connecting iron (3B). Push it toward the front.

That is, the opening (1B) of the ovary storage part (2D), (2
b) Make space directly below empty to accommodate another ovary.

Note that the piston portion (2A) returns to its original state due to the elastic force of the spring (4B).

11) Then, repeat the same procedure as 8) and 9) above to remove and store the other ovary.

12) After removing all of the ovaries (12), pull out the actual culprit removal instrument (A) from the vagina. At this time, use the ovariectomy instrument (A)
The wound in the vaginal wall caused by the insertion of the device is small enough to heal naturally, so no special treatment is required. In addition, as mentioned above, the openings of the outer tube (1) and the inner tube (2) (
If the cut is made using the not-so-sharp cut section (5) formed by the edges (1B') and (2b') of 1B) and (2b), there will be less bleeding from the cut than if the cut is made with a sharp knife. In addition, unnecessary fatigue of the cows can be avoided.

Therefore, as shown in the following example, cows whose ovaries have been removed using the apparatus and method of the present invention will not suffer from any problems in their subsequent growth, etc.

(Case study) Below, we will examine the fattening status of cows whose ovaries have been removed using the ovariectomy method using the ovariectomy tool described above, using cows whose ovaries have been removed and those whose ovaries have not been removed. Let's discuss the results of examining the parameters.

That is, when we conducted a fattening effect comparison test using the equipment and method of the present invention on heifer Holstein cows whose ovaries were removed (test group) and heifer Holstein cows whose ovaries were not removed (control group), the results were as follows. As shown in the comparison results, there was almost no difference in the growth status of the two.

In addition, small-sized cows were selected for use in the test plots in order to facilitate ovariectomy.

- Test cows: 13 6-month-old Holstein cows Ovariectomized cows (test group) 6 Ovariectomized equipment Days of breeding: 406 days Breeding method: Ad libitum feeding (rice straw + compound feed), housed.

Fattening results: As shown in Table 1 below.

[Test cows = 23 Holstein cows, 6 to 7 months old, 11 ovariectomized cows (experiment group) Ovariectomy equipment Rearing days: 461 days Rearing method: Same as case 1.

Fattening results: As shown in Table 2 below.

Test results: From the fattening results of Cases 1 and 2 above, it is clear that in both tests, the fattening effect of the test plot exceeds that of the control plot, and the fattening effect of ovariectomy on cows is No impact was observed.

Furthermore, in any of the tests, there was no occurrence of estrus during the testing in the test plots, and the feeding management was very easy.

(Effects) The ovary removal method and the oophorectomy device of the present invention do not cause any hindrance to the growth (development) of the living body;・It can be carried out easily and quickly without requiring a mentally burdensome open surgery, and with minimal damage to the living body. 2) By quarantining farmed cattle with a clear pedigree, it can be ensured that they are free from infectious diseases. By pre-selecting cows and then removing their ovaries, we can ensure that we have descendants with excellent bloodlines and are free from diseases. 3) Ovaries collected from quarantined cows are free from specific diseases. Since it is guaranteed that the cows will be fertilized in vitro, there is no problem in transferring them for in vitro fertilization.4) In addition, cows whose ovaries have been removed are fattened appropriately and then slaughtered, and sold to consumers as meat (products). 5) Furthermore, by making it possible to safely remove the ovaries from the living body, it suppresses estrus in cows, and as a result, reduces the human burden. 6) From the effects of the present invention described in 1) to 5) above, the intended objective was to reduce beef cattle production costs (cost reduction);
It can also be expected to have sufficient economic effects for both livestock (producers) and consumers.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a diagram showing how the instrument of the present invention is used, Fig. 2 is a perspective view showing the overall external configuration of the oophorectomy instrument of the present invention, and Fig. 3 is its interior. FIG. 2 is a vertical cross-sectional view including a partially non-sectional portion showing the structure. (A)... Ovarian removal instrument, (1)... Outer tube, (1A
)...Puncture opening, (1B)...Opening, (1C
)...Inner wall surface, (1D)...Gripping part, (1B')...
... Edge, (2) ... Inner tube, (2A) ... Puncture part,
(2B)...Ovarian storage part, (2C)...Extension rod part, (2D)...Operation handle, (2a)...Ovarian storage space, (2b)...Opening , (2c)...
・Outer wall surface, (2b')...Edge, (3)...Ovarian push rod, (3A)...Piston part, (3B)...
Connecting rondo part, (5)... Resection part, (10)... Rectum, (11)... Vagina, (12)...
・Ovaries, (13)...uterus. 1 0 Figure 1

Claims (2)

[Claims] (1) Insert one hand into the rectum (10) of the mammal, insert the ovariectomy instrument (A) into the vagina (11) with the other hand, and insert the puncture part (2A) of the ovariectomy instrument (A). The ovary was protruded and the vaginal wall around the external cervical os was punctured, the ovary removal device (A) was inserted into the abdominal cavity, and the ovary (12) was grasped through the intestinal wall with the hand inserted into the rectum.
Guide one of the ovaries into the ovary storage part (2B) of the ovarian removal instrument, and remove the extraovarian tissue where the ovary stored in the ovary storage part (2B) is connected to the uterus (13) by the resection part (5). A method for removing a pair of ovaries from a mammal, comprising: cutting or crushing the ovaries, and storing only the removed ovaries in an ovary storage part (2B) of an oophorectomy instrument (A). (2) Insert into the vagina from the vaginal opening and insert the puncture part (2A) into the vaginal wall.
An ovarian removal instrument that punctures the ovary to position the ovary storage part (2B) at the ovary position, stores the ovary in the ovary storage part (2B), and cuts extra-ovarian tissue with the resection part (5), The ovarian removal instrument consists of an outer tube (1) that forms the outermost shell, an inner tube (2) that is housed inside the outer tube so that it can be reciprocated and rotated, and an ovary pusher rod that is housed inside the inner tube so that it can move back and forth. (3
), the inner tube (2) has a pointed puncture part (2A) at its tip that protrudes and retreats from the puncture opening (1A) at the tip of the outer tube (1), and an inner tube behind the pointed puncture part (2A). (2) An ovary storage part (2B) formed in the space inside and having an ovary storage space (2a) and an opening (2b) for taking in the ovary on its peripheral wall, and the tip thereof communicates with the ovary storage part (2B). An extended rod portion (2C) whose rear end extends to the rear end of the instrument and has a space inside, and an inner tube operating handle (2D) formed at the rear end of this extended rod portion (2C). The outer tube (1) has a puncture opening (1A) from which the puncture portion (2A) projects on the distal end surface.
And behind it, with the puncture part (2A) of the inner tube (2) stored in the outer tube (1), the ovary storage space (2a) of the inner tube (2) is connected to the outside of the device. An opening (1B) for taking in the ovary that matches the opening (2b) of the inner tube (2) is formed so as to communicate with the inner tube (2).
The inner wall surface (1C) of the outer tube has a thickness that is in sliding contact with the outer wall surface (2c) of the ovary storage portion (2B) in 2), and the gripping portion (1D) of the device that is formed protrudingly on the rear wall thereof. and the ovary pusher rod (3) has the ovary storage part (3) at its tip.
2B), and a piston part (3A) that reciprocates within the inner pipe (2B), and a piston part (3A) that reciprocates within the extended rod part (2C) of the inner tube (2) that is connected to the rear of the piston part (3A), and moves the piston part from the rear end of the instrument. (3
A) is provided with a connecting rod part (3B) for reciprocating the tube, and the cutout part (5) is located at the edges of both the openings (1B) and (2b) of the outer tube (1) and the inner tube (2). Part (1B'), (2b'
) A mammalian ovariectomy instrument, characterized in that it is formed of: