This looks like a square with a drop of blood in the center. There are three lines above the drop of blood, each one slightly slanted. A longer line is separating the blood from the liens.
This Dialysis icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 6,000 icons, all in the same style and quality.