PVP (tseem hu ua povidone) yog cov dej-soluble polymer zoo ib yam li dextran siv hauv kev kho mob thiab kev lag luam (daim duab saum toj no). Txawm hais tias tsis tshua muaj lus ceeb toom txog kev tsis haum tshuaj loj, povidone feem ntau suav tias yog povidone muaj kev nyab xeeb Lub pH ntawm cov tshuaj ketone-iodine yog kwv yees li 5, thiab cov acidity txo nrog dilution. 10% povidone-iodine muaj 90% dej, 8.5% povidone, thiab 1% iodine thiab iodide.
Povidone-iodine tuaj yeem ua rau ntau yam fungi, protozoa, thiab kab mob. Povidone yog hydrophilic thiab muaj affinity rau cell membranes, thiab ncaj qha thauj diatomic-dawb iodine mus rau saum npoo ntawm lub hom phiaj hlwb. Rau, povidone-iodine feem ntau ua rau cytoplasmic membrane thiab cytoplasm thiab tuaj yeem ua haujlwm li ob peb feeb.
1. Siv 5 feem pua -10 feem pua povidone-iodine
Thoob plaws ntiaj teb, qhov concentration ntawm povidone-iodine siv rau ntawm qhov muag qhov muag yog feem ntau 5 feem pua -10 feem pua
Shimada et al tau tshaj tawm cov txheej txheem uas 0.25 feem pua povidone-iodine tau siv ntau zaus thaum phais kab mob cataract, nrog 2-3 tee txhua 20-30 vib nas this.
Rau qhov mob pob txha, 1.25 feem pua povidone-iodine tuaj yeem siv 4 zaug hauv ib hnub.
Txhawm rau tiv thaiv tus mob ophthalmia, 2.5 feem pua povidone-iodine tuaj yeem siv ib zaug. Tsis muaj cov ntaub ntawv qhia txog kev siv povidone-iodine nyob rau hauv lub anterior chamber.
Hauv kev phais vitreoretinal, 0.025 feem pua povidone-iodine endophthalmitis tuaj yeem muab ntxiv rau perfusate.