| 摘要 |
An improved electrosurgical pencil system (10) is formed with an in-line filter (32). The system (10) comprises a disposable electrosurgical pencil (12) and a disposable gas tube (14). The filter (32), which is preferably disposable, may be installed anywhere along the system (10) and is preferably positioned at the first end (30) of the tube (14). A filter material (44) comprises a length of tubular fibrous material repeatedly folded back upon itself. The material (44) is then sealed in a cylinder (46) and provided with openings (52) therein for receiving gas. The material (44) allows the gas to pass freely therethrough while preventing the passage of any particles larger than a preselected size. Thus, any bacteria larger than the preselected size are prevented from reaching the patient through the pencil system (12).
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