Medical ultrasound (also known as diagnostic sonography or ultrasonography) is a diagnostic imaging technique based on the application of ultrasound. It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. Its aim is often to find a source of a disease or to exclude pathology. The practice of examining pregnant women using ultrasound is called obstetric ultrasound, and was an early development and application of clinical ultrasonography. Full-Digital Ultrasound Machine Medical Full-Digital Pregnancy Fetal Diagnostic，Trolley Ultrasound Machine for Sale，Mindray Ultrasound Machine,Full-Digital Laptop Ultrasound Machine Unimedsume Trading Co., Ltd , https://www.ums-labmed.com
Anti-hypoxia Under normal circumstances, hypoxic pans occur mostly in the summer and autumn high temperature season, and rare in winter. However, in the Feishui Fish Pond, Shentan Deadwater Fishpond, and cage culture conditions, dead fishes with hypoxia can also occur in the winter. As the temperature drops, the temperature of surface water drops, the density increases and it sinks. Underlying anoxic and anaerobic floating will cause serious oxygen deficiency in the upper water. In addition, the photoperiod in the winter is short, the photosynthesis of the phytoplankton in the water is weakened, and the oxygen production is reduced, which also results in insufficient oxygen in the aquaculture water. Therefore, oxygenation measures should be taken timely in these waters to prevent flooding.
Cold winter winter fish species are vulnerable to cold damage. Take the following measures to avoid cold and increase temperature:
Set up shelters to avoid cold and piling on the north side of the pond. Weave a woven bag or straw curtain as a barrier to reduce cold currents.
Fertilize the manure and heat up to about 500 kilograms per hectare of pond to compost the livestock manure, and use the heat released from the fermentation of the fertilizer to increase the water temperature.
During the warm winter days, the north wind whistled, and there was often frost at night. Wet grass could be used to produce smoke on the shore to reduce frost.
Put water plants into the fish ponds in winter to put the appropriate amount of plants to allow the fish to avoid the cold in the grass.
Intensifying water injection In the afternoon of high-temperature sunny days, the water in shallow water ponds with higher water temperature is injected into fish ponds to raise the temperature of fish ponds.
Ultrasound are sound waves with frequencies which are higher than those audible to humans (>20,000 Hz). Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound into tissue using a probe. The ultrasound pulses echo off tissues with different reflection properties and are recorded and displayed as an image.
Many different types of images can be formed. The most common is a B-mode image (Brightness), which displays the acoustic impedance of a two-dimensional cross-section of tissue. Other types can display blood flow, motion of tissue over time, the location of blood, the presence of specific molecules, the stiffness of tissue, or the anatomy of a three-dimensional region.
Compared to other dominant methods of medical imaging, ultrasound has several advantages. It provides images in real-time and is portable and can be brought to the bedside. It is substantially lower in cost than other imaging modalities and does not use harmful ionizing radiation. Drawbacks include various limits on its field of view, such as the need for patient cooperation, dependence on physique, difficulty imaging structures behind bone and air or gases,[note 1] and the necessity of a skilled operator, usually a trained professional.
How to avoid cold and increase temperature of mutton fish
Shallow water is shallow in winter and the water temperature changes quickly, and the temperature difference is large, which is unfavorable for fish growth. After the water level drops, the fish population density increases accordingly, and it is easy to cause lack of oxygen and stop the fish from growing or even die. Therefore, winter ponds should maintain normal water levels.