JPS62112547A - Early stage pregnancy diagnostic device by doppler reaction method of bovine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an early pregnancy diagnostic device for cows.

[Conventional technology]

For dairy farmers, in order to efficiently utilize milk production during a cow's lifetime, it is essential to diagnose whether each cow is pregnant as early as possible and to eliminate infertile cows. For this reason, various early pregnancy diagnosis methods have been used, and the conventional methods are classified as follows.

(a) Presence of return to estrus When pregnancy is established, the 21-day estrous cycle (estrus) stops and the first estrus does not return (no estrus occurs at all until delivery). This cessation of estrus can be seen as a sign of pregnancy, and can be observed under daily supervision. However, some individuals may not come into estrus even if they are not pregnant, or may have weak estrus that may not be visible from the outside, so it is generally used in conjunction with other pregnancy diagnosis methods.

(b) Rectal examination method Rectal examination method is a pregnancy diagnosis method widely applied in large and medium-sized animals. That is, the presence or absence of brain membranes, spores, through the rectum.
This is a method of determining the condition of the uterine horns and ovaries (corpus luteum) by palpation. However, this method requires a certain degree of skill, and in the case of cattle, it is difficult to determine whether the cattle are 6 weeks old or older. Additionally, pregnancy diagnosis around 40 days is sometimes misdiagnosed as uterine tuberculosis or pyometra, and currently the probability is about 80%.
It is.

(c) X-ray method This method utilizes X-ray fluoroscopy or tomography. Pregnancy diagnosis using this method cannot be applied until after the bone tissue of the spores has differentiated, that is, after 2 to 2.5 months, and it cannot be used for early diagnosis compared to the rectal examination method. Furthermore, since it emits X-rays, there are concerns about side effects on breeding cows and fetuses, so it is not used as a field diagnostic method.

(d) Ultrasonic Diagnostic Method This method was originally developed as a method for various clinical diagnosis of humans, but has recently been applied to livestock as well. That is, diagnosis is made by applying a probe for transmitting and receiving ultrasonic waves to the surface of an animal body and detecting changes in the frequency of reflected waves caused by the beating of the fetal heart.
(See Publication No. 3642). However, in the case of cows, there are uteruses on both sides, and if the uterus is conceived on the left side, the rumen becomes an obstruction, making diagnosis difficult. Currently, pregnant N5
It is mainly used to confirm the survival of a fetus after 6 months.

(e) Other attempts have also been made to diagnose pregnancy by using changes in vaginal pH or electrical resistance, or by immunologically measuring progesterone in milk or blood. However, all of these methods are laboratory methods and have the disadvantage of being time-consuming and costly.

[Problem that the invention seeks to solve]

Although there are various methods for diagnosing pregnancy in cows as described above, the main methods are generally confirmation of return to estrus and rectal examination.

However, because the conventional rectal examination method relies only on the sensation of the examiner's fingertips, the client cannot confirm this and has no choice but to trust the examiner's judgment. As mentioned above, since the probability is about 80%, there is a problem that infertile individuals cannot be eliminated.

The present invention aims to improve the problems of the prior art as described above, and to provide a pregnancy diagnostic device that can quickly and reliably diagnose pregnancy in cows.

Further, the present invention aims to provide an early pregnancy diagnostic device that allows not only the examiner but also the requesting animal to confirm pregnancy.

[Means for solving problems]

In order to achieve the above-mentioned objects, the present invention provides a probe for transmitting and receiving ultrasonic waves, and a probe for transmitting and receiving ultrasonic waves in which the frequency of reflected ultrasonic waves changes due to an increase in blood flow to the uterus or the heartbeat of a bovine fetus. The probe is structured so that it can be inserted into the rectum of a cow by holding it between a person's fingers, and detects the uterine junction while palpating the uterine condition during a rectal examination. Enables blood flow in tissues or fetal heart sounds to be heard as audible sounds.

Furthermore, the present invention is equipped with at least two earphones that capture the audible sound, so that when the examiner determines that she is pregnant, she can use one of the earphones to confirm this to the client animal.

[Effect]

The probe for transmitting and receiving ultrasonic waves has a structure that allows it to be inserted into the rectum of a cow by holding it between a person's fingers. As a result, blood flow to the uterus increases around 25 to 30 days after insemination, and by detecting the fetal heartbeat from 40 days after insemination, early and reliable pregnancy diagnosis is possible. can be done. Furthermore, not only the examiner but also the requesting animal can listen to the sound to confirm the fact of pregnancy.

〔Example〕 Hereinafter, an example of implementation of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an external view of a cattle pregnancy diagnostic device to which the present invention is applied. In the figure, a diagnostic device main body 2 is an ultrasonic probe connected to the main body, and has a transmitting transducer and a receiving transducer as described later.

The main body of the diagnostic device includes a power switch 3, a probe connection plug 4, two earphone jacks 5, a speaker selection switch 6, a volume controller 7, a charge lamp 8, a battery indicator 9, and one head. The device is equipped with a neck 10 of a hanging string, and is used by connecting an earphone 11 to each of the earphone jacks. And the ultrasonic probe 2
In order to insert the probe into the rectum of a cow by holding it between the fingers, for example, a protrusion 2a for pinching the finger is provided on the back of the probe 2, and the tip of the protrusion 2a is Ampulla 2b
form. Although this embodiment shows an example in which the protrusion 2a is provided so that the protrusion 2a can be held between the fingers, the protrusion may be replaced by a band that is attached to the finger. In order to be able to insert the probe together with the hand into the rectum of a cow, the probe has dimensions of, for example, a diameter of 40 mm, a thickness of 20 m, and a height of the protrusion 2a of about 20 [1].

FIG. 2 is a block diagram showing the circuit configuration of the diagnostic device. As shown in this figure, this device consists of a source section, a main circuit section, and a probe section.The power section is equipped with a rechargeable battery 11, and a transformer is connected to the commercial power supply. 12. The rechargeable battery 11 is connected to the rechargeable battery 11 via a rectifier circuit 13 and a charging circuit 14.
It is structured so that it can be filled with many people. The main circuit section also includes a high-frequency oscillator 15 that supplies ultrasonic waves to the transmitting transducer 21 of the probe 2, a high-frequency amplifier 16 that receives reflected waves received by the receiving transducer 22, and a detector 17. and a low frequency amplifier 18.

The output of the low frequency amplifier 18 is connected to the earphone 11.

The high-frequency oscillator 15 continuously oscillates a sine wave at an ultrasonic frequency, and supplies the sine wave to the transmitting transducer 21 . The transmitting transducer 21 converts the electrical vibration into mechanical vibration energy and transmits an ultrasonic wave. The receiving transducer 22 receives ultrasonic waves reflected from various parts of the body in addition to ultrasonic waves that have undergone a target Doppler shift. The receiving transducer 22 converts the combined ultrasonic energy into an electrical signal, but since this signal is extremely small, it is amplified by the high frequency amplifier 16 and supplied to the detector 17. Only the Doppler component is extracted to obtain an audio frequency signal, which is further amplified by a low frequency amplifier 18 and supplied to the earphone 11.

Since the early pregnancy diagnostic device of the present invention is constructed as described above, it is possible to perform early diagnosis of pregnancy in cows as described below. That is, a rectal examination is performed by inserting the protrusion 2a of the probe 2 between the index and middle fingers and inserting the hand into the rectum of the cow as shown in FIG.

Signs of pregnancy less than 1 month after insemination are not apparent during conventional rectal examination. However, about 40 days after insemination,
The uterine horns of the inseminated side swell and sink due to the presence of spores, amniotic fluid, and urinary ascites, and the left and right uterine horns become asymmetrical. Additionally, if you are skilled, you will be able to palpate the brain membranes, which will provide clues for pregnancy diagnosis.

In the present invention, during the rectal examination, the probe 2 can be brought into contact with the uterine horn closest to the uterine horn.
At around 30 days, 1IrLdε increases to the uterus, so changes in reflected waves caused by blood flow are used to detect early pregnancy diagnosis. Early pregnancy diagnosis can be performed by replacing changes in reflected waves with sound.

Furthermore, in this case, not only the diagnostician (veterinarian, etc.) can listen, but also the client (the bastard) can listen using a separate earphone, which increases the reliability of the diagnosis.

〔Effect of the invention〕

As described below, the present invention has the effect of allowing early and accurate diagnosis of pregnancy in cows using a probe held between the fingers during a rectal examination.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an outline of a bovine pregnancy diagnostic device according to the present invention, FIG. 2 is a block diagram showing an internal electric circuit, and FIG. 3 is an explanatory diagram during pregnancy diagnosis. 1...Diagnostic device body, 2...Probe, 2a...Protrusion,
2b... Ampulla, 3... Power switch, 4...
Probe connector. 5...Earphone jack, 11...Earphone.

Claims (1)

[Claims] 1. A probe for transmitting and receiving ultrasonic waves, and a Doppler that detects changes in the frequency of reflected ultrasonic waves as audible sounds due to an increase in blood flow to the uterus or the heartbeat of a tallow baby. 1. An early pregnancy diagnostic device using a Doppler reaction method for cattle, characterized in that the probe is configured to be inserted between a human finger and inserted into the rectum of a cow. 2. Claim 1 comprising at least two earphones for capturing the audible sounds of the Doppler diagnostic device.
An early pregnancy diagnostic device using the bovine Doppler reaction method described in Section 1.