Cov syringe twj tso kua mis yog hais txog cov khoom siv kho tshuab thiab hluav taws xob tswj, uas tswj cov syringe twj tso kua mis thawb lub taub hau los ua rau ntawm syringe thawb kov los ntawm lub cev muaj zog thiaj li tswj tau qhov kev txhaj tshuaj nrawm.Cov syringe twj tso kua mis yog siv ua ke nrog cov syringe txhaj cov kua rau hauv tus neeg mob lub cev nrog me me metering thiab meej kom muaj nuj nqis.Raws li tus naj npawb ntawm cov channel, nws tuaj yeem muab faib ua ib-channel thiab ntau-channel (dual-channel, plaub-channel, rau-channel, yim-channel, kaum-channel, thiab lwm yam)