anal fistula (fistula in aÂ´no) one opening on the cutaneous surface near the anus, which may or may not communicate with the rectum. arteriovenous fistula one between an artery and a vein, either pathologic (such as a varicose aneurysm) or surgically created to ensure an access site for hemodialysis.
1 millibar (or hectopascal/hPa), is equivalent to 0.02953 inches of mercury (Hg). It is therefore only necessary to multiply a reading in millibars by the latter figure, to achieve the required conversion. E.g. for 1023 mbar, multiply by 0.02953=30.21 inches.
2) Inches of mercury (Hg) on a scale of 0 to 30, and the metric equivalent 3) Millimeters of Hg on a scale of 0 to 760 (A millimeter = 1/000 th of a meter) One needs to be cautious here, as the original mercury in a tube vacuum gauge measures the reduced pressure (vacuum) from atmospheric pressure downwards towards zero pressure, but the numbers on the scale read from 0 towards a maximum of 30.