1, monitoring follicles and corpus luteum: mainly to cattle and horses reported mainly in large animals, the main reason is that the large animals can grasp the ovary in the rectum and clearly show the ovary of the various facets; in small and medium-sized animals of the ovary is small, often by the intestinal tube and other viscera obscured in the non-surgical condition is difficult to grasp, so it is not easy to show the ovary facets. The ovaries of cows and horses can be observed with a 5.0-7.5 MHz linear or convex array probe through the rectum or vaginal vault, and the follicles and corpus luteum can be observed with the ovaries held in the hand.
2. Monitoring the uterus during the estrous cycle: The uterine sonograms during estrus and other periods of the sexual cycle are distinctly different. The endocervical layer and the myocervical layer of the uterine cervix are clearly demarcated during the estrus period, due to the thickening of the uterine wall, the uterine water content increases and makes the sonogram have more hypoechoic dark areas, uneven texture. In late oestrus and interoestrus the uterine wall image was brighter and endometrial folds were visible, but there was no fluid in the cavity.
3, monitoring the postpartum uterine depreciation: primiparous cows uterine horns in the postpartum more than 40d when the depreciation is complete, the cows need about 50d, the depreciation is close to completion of the uterine myometrium and other tissues boundaries are obvious, the endometrium is gradually thickened, the image becomes white. In dogs, it takes about 15 weeks to complete uterine regrowth.
4, monitoring uterine disease: ultrasound ultrasound is more sensitive to endometritis, uterine pus. Inflammation of the uterine cavity outline blurred, the uterine cavity swelling with some echoes and snow flakes; pus when the uterine body is enlarged, the wall of the uterus is clear, the uterine cavity has a liquid dark area.
5, early pregnancy diagnosis: early pregnancy diagnosis is mainly based on the detection of the gestational sac, or pregnant body. The gestational sac is a round liquid dark area in the uterus, the pregnant body for the uterus in the round liquid dark area of the strong echogenic light mass or spot.
6. Observation of embryonic development: The development of the embryo is determined by observing the changes in the extrauterine and intrauterine structures of the fetus.
7, monitoring the fetal dead and alive: ultrasound detection of fetal heartbeat, can predict the fetal dead and alive. Before the embryo dies, the heartbeat decreases significantly. Fetal movement disappears, the fetal sac is full of liquid dark area, can not see the embryonic buds, uterine echogenicity is disturbed, can not identify the fetal sac, placenta and fetal structure, etc. are all indicative of embryonic death.
8, identify the sex of the fetus: using ultrasound to detect the fetal reproductive nodes and the location of the surrounding structures can accurately identify the sex of the fetus. In the 50-105d after the breeding of cattle, the accuracy rate of identifying the sex of the fetus is 96%.
9, estimate the number of fetuses and predict the age of the fetus: estimate the number of fetuses is mainly used for animals with multiple fetuses. ultrasound can also determine the size of the fetus with a high degree of accuracy, and can predict the date of calving according to the size of the fetus. The size of the fetal sac diameter can be used to roughly estimate the size of the fetus, and the diameter of the chorionic villus cavity and uterine diameter are also used to determine the age of the fetus.
10, monitoring the reproductive organs of male animals: 7.5MHz or 5.0MHz probe through the surface of the male testes and parasympathetic glands, used to diagnose diseases of the reproductive organs of male animals. This is mainly to observe whether there is fluid and calcification in the tissues, and to detect urethral stones, paraphysical cysts, fluid accumulation, hypertrophy, atrophy and so on.
B, veterinary ultrasound in animal husbandry production
1, ultrasound ultrasound for regular pregnancy monitoring, as well as early identification of empty sows and reduce feeding waste, increase economic benefits. Through the ultrasound early pregnancy monitoring diagnosis of pregnancy accuracy increased by at least 9 percentage points, timely detection of non-pregnant sows, to avoid the "ineffective feeding". Only a rough estimate, monitoring of early pregnancy in the first year to save feeding costs, that is, to obtain direct economic benefits of about 5,000 yuan; at the same time, ultrasound monitoring can be early and accurate grasp of the number of gestating sows, play a role in ensuring balanced production. Due to early detection of a large number of empty pregnancy, the reason for this, due to the introduction of boars into the infectious disease infection, timely measures to reduce economic losses. ultrasound can also be abnormal ovarian function or disease, empty pregnancy and uterine disease, stillbirth abortion and boar testes, gonadal diseases such as monitoring, these functions play and profit, can be found in time to detect anomalies, and take appropriate measures to greatly improve the monitoring of the health of the herd. The level of monitoring the health of the herd can be greatly improved and the production efficiency can be increased.
2. Determine the thickness of the pig's backfat and calculate the area of the eye muscle. Breeding farms can use B ultrasound to accurately determine the backfat thickness and calculate the eye muscle area of pigs in vivo without damage, which greatly improves the science and accuracy of breeding selection.
3, transgenic sheep and cloned sheep pregnancy analysis: equipped with a 5MHz rectal probe ultrasound tomography scanner on the transgenic or cell nuclear transplantation of embryo transplantation recipients of white goats and natural mating sheep pregnancy check. The results showed that the accuracy of negative pregnancy diagnosis (ultrasound judgment of non-pregnant goats) was 100% in the test goats from 28 to 102 d after embryo transfer, and the accuracy of positive (ultrasound judgment of pregnancy) and negative pregnancy diagnosis was 100% in the naturally mated goats and cytoskeletal transplantation recipient goats, and false positives were found in some of the transgenic recipient goats due to the cessation of fetal development or miscarriage.
4. B-type ultrasound guided collection of bovine oocytes. The collection of bovine oocytes by B-type ultrasonic conduction is simple, reliable, causes little damage to the vagina and ovaries of cattle, and has no adverse effect on the health and reproductive function of cattle. Egg collection was repeated twice for the same cow at 4-day intervals within a week's time, and the recovery rate of oocytes was 41%.
5. The application of B-mode ultrasonic diagnostic technology in the industrialization of Boer goat embryo transplantation, ultrasonic diagnostic technology has been more frequently applied to pregnancy examination, pregnancy monitoring, and supernumerary ovulation in the research of mammalian embryo engineering and genetic engineering.
C, analysis of practical applications in pig farms
1, the first time to detect whether the pregnancy (the first estrus: 19-21 days) at this time to detect the presence of pregnancy, for farmers is the most cost-effective, and if the empty pregnancy can be re-matched in a timely manner, which greatly shortens the ineffective rearing time.
2, about 30 days after breeding to estimate the number of embryos as a large-scale farms, this is a must pay attention to the indicators. Early estimation of the number of embryos is conducive to the adjustment of nutritional formulas in the diet of pregnant sows as well as the amount of feeding. When the number of embryos and nutrition and diet can not keep up, it is easy to cause abortion or weak fetus; and when the number of embryos and nutrition and diet is too small, it is easy to cause the embryo individual development is too large, causing difficult birth.
3, 65 days after breeding can be detected with or without stillbirth as a farmer, the most afraid of is the emergence of stillbirth, early detection of stillbirth can be avoided not small economic losses. If there are stillbirths, you can do something about it according to the situation.
4, two, three times can not match the check whether there is uterine inflammation, ovarian cysts and other reproductive disorders ovarian cysts: commonly known as pig infertility, is currently plagued by one of the serious problems of the farmers, the main symptom is repeatedly with the infertility, the sows are obvious symptoms of estrus, the time of the estrus is more regular, but just can not match.
5, the mid-term can be detected with or without embryo absorption, is also one of the problems plaguing farmers the main symptoms: after breeding no longer have estrus performance two months or so when the stomach is a little big to the delivery period a little milk, but after the delivery period is not the performance of the litter.
Xuzhou Dawei veterinary b ultrasound machine S10:
First-class digital imaging technology, the image is clearer
Display size: 6.5-inch LCD monitor.
Display magnification: ×0.8, ×1.0, ×1.2, ×1.5, ×1.8, ×2.0 six modes; when ×0.8, ×1.0, it can enhance the depth display.
Local zoom: real-time local 2x zoom.
Dynamic range: 0 to 120dB adjustable.
Concentration: Dynamic digital electronic point-by-point focusing.
Pre-processing: variable aperture, dynamic tracing, dynamic digital filtering.
Post-processing: 8 kinds of γ correction, line correlation, frame correlation, point line correlation, linear interpolation, digital temporal filtering, digital hook edge enhancement, pseudo-color processing and so on.
Variable frequency: with 2.5MHz/3.0MHz/3.5MHz/4.0MHz/5.0MHz five kinds of variable frequency reception;
Image polarity: left/right flip, up/down flip
Movie storage: real-time display of 256 consecutive cycle storage.
Scope of application:
Examination during embryo transfer;
Identification of empty womb of pig, horse, etc.
Determination of muscle thickness and area of avian;
Diagnosis of uterus, ovary, and other diseases of the reproductive system;
Diagnosis of pregnancy, fetal development, fetal viability and sex determination;
Various animals Examination of tumors, abscesses and hematomas on the body surface of the udder machine;
Determination of the thickness of backfat of large animals such as cows, sheep, horses, pigs and camels, and the determination of the mass of rump fat, psoas muscle area and muscle.
Technical parameters of body mold
TMaterial sound velocity: 1540± 10m/s (23 ±3℃);
TMaterial sound attenuation coefficient: 0.70±0.05db/cm/MHz (23 ±3℃);
Nylon target line diameter: 0.3±0.05mm;
Nylon target line tolerance: ± 0.1mm. 0.1mm.
Options:
6.5MHZ/R13 micro-convex probe
7.5MHz/L40 line array probe.