In this age of talking about 營養品 癌症 cancer discoloration, most people will be surprised to hear about cancer and think that there is almost no chance of cure.

1. Before cancer treatment

Before treating cancer, you should pay attention to nutritional supplements. Because cancer treatment methods are diverse, such as surgery, radiotherapy, chemotherapy and other treatment methods more or less affect the body. Therefore, it is necessary to store energy and provide nutrition to reduce the risk of surgery or other treatments.

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2. After the operation

Cancer patients should pay attention to their diet after surgery. After the operation, you can choose liquid food, semi-liquid food as nutrition. At this time, the patient's digestive ability is reduced, and it is not recommended to eat indigestible, high-calorie foods. Allow patients to eat porridge food appropriately, provide nutrition for vegetable soup and a small amount of protein, and not eat too much animal fat, thereby preventing health effects.

3. Chemotherapy stage

Cancer patients need to pay attention to the correct method when supplementing nutrition, and they need to supplement nutrition when entering the chemotherapy stage. The use of chemicals during chemotherapy may not only kill cancer cells, but may also damage normal cells. Therefore, we must pay attention to nutritional supplements to prevent physical damage.

If you lose your appetite and feel sick after chemotherapy, you can eat more easily digestible foods to improve your appetite. There are also some hard-to-digest foods that need to be preserved. Only by choosing to improve appetite and digestible foods can we gain nutrition and maintain our health.

4. Radiotherapy stage

If cancer patients need to receive radiation therapy, it may cause undesirable symptoms.

You get the right amount of protein and vitamins. In addition, appropriate intake of dietary fiber and carbohydrates, supplement enough energy, and maintain normal life activities. Some foods that are difficult to digest, high-fat and irritating foods need to be kept away. Only a light and healthy diet can prevent the wrong diet from causing harm to patients after radiation therapy.

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1. Mechanical effects. The mechanical action of ultrasound can promote the emulsification of liquids, the liquefaction of gels and the dispersion of solids. When a standing wave is formed in the ultrasonic Portable ultrasound fluid medium, the tiny particles suspended in the fluid are condensed at the nodes due to mechanical force.

Form periodic accumulation in space. When ultrasonic waves propagate in piezoelectric materials and magnetostrictive materials, induced electrical polarization and induced magnetization are caused by the mechanical action of ultrasonic waves.

2. Cavitation. When ultrasonic waves act on liquids, a large number of small bubbles can be produced. One reason is that partial tensile stress occurs in the liquid to form a negative pressure. The decrease in pressure makes the gas originally dissolved in the liquid supersaturate and escape from the liquid and become small bubbles. Another reason is that the strong tensile stress "tears" the liquid into a cavity, which is called cavitation.

Application of Ultrasonic Waves whose frequency is higher than the upper limit of human hearing (approximately 20,000 Hz) are called ultrasonic waves.  The law of reflection, refraction, diffraction, and scattering of ultrasonic waves in the medium is not essentially different from the law of audible sound waves. But the wavelength of ultrasound is very short, only a few centimeters, even a few thousandths of a millimeter. Compared with audible sound waves, ultrasonic waves have many strange characteristics: propagation characteristics-the wavelength of ultrasonic waves is very short, and the size of usual obstacles is many times larger than the wavelength of ultrasonic waves. Therefore, the diffraction power of ultrasonic waves is very poor. It is in a homogeneous medium. It can propagate in a directional straight line, and the shorter the wavelength of the ultrasonic wave, the more significant this characteristic is. Power characteristics-when sound propagates in the air, it pushes the particles in the air to vibrate back and forth to do work on the particles. The power of the sound wave is a physical quantity that expresses the speed of the sound wave's work. Under the same intensity, the higher the frequency of the sound wave, the greater the power it has. Due to the high frequency of ultrasonic waves, the power of ultrasonic waves is very large compared with ordinary sound waves. Cavitation-When ultrasonic waves propagate in the liquid, small cavities are created in the liquid due to the violent vibration of the liquid particles. These small cavities expand and close rapidly, causing violent collisions between the liquid particles, resulting in pressures of thousands to tens of thousands of atmospheres. This violent interaction between the particles will cause the temperature of the liquid to rise suddenly and play a good stirring effect, so that the two immiscible liquids (such as water and oil) emulsify and accelerate the dissolution of solutes. Speed ​​up the chemical reaction. The various effects caused by the action of ultrasonic waves in the liquid are called ultrasonic cavitation.

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