Ultrasoundimhando ye elastic mechanical wave in material medium.Icho chimiro chewave.Nokudaro, inogona kushandiswa kuona ruzivo rwehutano uye pathological yemuviri womunhu, kureva, diagnostic ultrasound.Panguva imwecheteyo, ihwowo chimiro chesimba.Kana imwe dosi ye ultrasound ichipararira muzvisikwa, kuburikidza nekudyidzana kwavo, inogona kukonzera shanduko mukushanda uye chimiro chezvipenyu, kureva, ultrasonic biological effect.

Migumisiro ye ultrasound pamasero inonyanya kusanganisira thermal effect, cavitation effect uye mechanical effect.Mhedzisiro yekupisa ndeyekuti kana ultrasound ichipararira mukati, kukwesha kunotadzisa kuzunguzika kwema molecular kunokonzerwa ne ultrasound uye inoshandura chikamu chesimba mukupisa kwakanyanya kwenzvimbo (42-43 ℃).Nekuti tembiricha inouraya inouraya ye45.7 ℃, uye kunzwa kwekuzvimba kwetishu yeLiu kwakakwira kupfuura yenyama yakajairwa, metabolism yemaseru eLiu akazvimba inokanganiswa nekupisa uku, uye kuumbwa kweDNA, RNA neprotein kunokanganisa. , Saka kuuraya masero egomarara pasina kukanganisa matishu akajairwa.

Cavitation mhedzisiro ndeyekuti pasi pe ultrasonic irradiation, vacuoles inoumbwa mune zvipenyu.Nekuzunguzika kwema vacuoles uye kuputika kwavo kwechisimba, mechanic shear pressure uye mhirizhonga inogadzirwa, izvo zvinoita kuti Liu azvimbe kubuda ropa, kuparara kwetishu uye necrosis.

Pamusoro pezvo, kana bubble recavitation ratsemuka, rinoburitsa tembiricha yakakwira pakarepo (inenge 5000 ℃) uye kukwira kwepamusoro (kusvika 500 ℃) × 104pa), iyo inogona kugadzirwa nekupisa kwekuparadzanisa kwemhute yemvura OH radical uye H atomu, neOH. radical uye The redox reaction inokonzerwa neH atomu inogona kutungamirira mukuparara kwepolymer, enzyme inactivation, lipid peroxidation uye kuuraya masero.

报错 笔记