| 摘要 |
A scanning cannula (105) is disclosed for scanning an electrosurgical instrument for electrical insulation defects, the scanning cannula comprising an elongated cannula configured to be inserted into a body. The cannula has a receiving end with a head portion, an opposite exit end and a passageway extending from the receiving end to the exit end, whereby only one sweeping contact is disposed in the passageway. A circuit is disposed in the head portion of the cannula, the sweeping contact being electrically connected to the circuit, and a communication device is connected to the circuit to transmit signals from the circuit to a controller of a surgical instrument. An electrosurgical instrument inserted into the receiving end of the cannula can pass through the sweeping contact and any electrical insulation defect of the electrosurgical instrument detected by the sweeping contact can be relayed as an error signal to the circuit configured to communicate the error signal to the controller. The head portion is detachable from the remaining portion of the cannula. |
