| open drainage | Drainage allowing air to enter. (05 Mar 2000) |
|---|---|
| through drainage | Drainage obtained by the passage of a perforated tube, open at both extremities, through a cavity; in addition, the cavity can be washed out by a solution passed through the tube. (05 Mar 2000) |
| tidal drainage | Drainage of the urinary bladder by means of an intermittent filling and emptying apparatus. (05 Mar 2000) |