| 摘要 |
A device (1) for use in the discharge of fumes (20) from an operating site (16), e.g. in laser surgery (17, 19), comprises a chamber (3) which is defined by a body (2) and has a bottom opening (4) to be placed over the operating site (16) for conducting fumes (20) emitted therefrom into the chamber (3), and a working opening (5) substantially opposite to the bottom opening (4) for providing access to the operating site (16) through the chamber (3) and the bottom opening (4). A first end (8) of an exhaust duct (7) opens in the vicinity of the chamber (3), and a second end (9) of the exhaust duct is adapted to be connected to a negative pressure for sucking off fumes (20) conducted into the chamber (3). One or more air passages (10-13) extending from the outside of the body (2) and separate from the bottom and working openings (4, 5). These separate air passages (10-13), as well as the first end (8) of the exhaust duct (7), open in the chamber (3) between the bottom opening (4) and the working opening (5) at two opposite sides of the chamber (3). Thus, a lid of laminar air flows (10', 11', 12', 13') is formed in the chamber (3), thus preventing leakage of fumes through the working opening (5). |
