An anal fistula is one of many possible reasons for blood in stool. It is a small channel that forms between the skin near the anus and the anal canal. It often causes pain and bleeding when passing stools. In some cases, anal fistula causes persistent drainage. Surgery is the only cure...
Flow of the solution inside the microchannel was basically driven by a constant pressure difference between the inlet and outlet of the channel, maintained by atmospheric pressure and gravitational force. Figure A1. Detailed channel geometry. Magnified view of the channels with the cross-sections of...