Lub blunt-tip cannula yog ib lub raj me me uas muaj qhov tsis sib npaug ntawm qhov kawg, tshwj xeeb tsim los rau kev txhaj tshuaj intradermal ntawm cov kua dej, piv txwv li cov tshuaj txhaj tshuaj. Nws muaj cov chaw nres nkoj ntawm sab uas tso cai rau cov khoom xa tawm ntau qhov sib npaug. Microcannulas, ntawm qhov tod tes, yog blunt thiab ua o ...
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