| 摘要 |
A system for monitoring the advancement of a needle (1) detects the puncture of the peritoneum and of the entrance into the abdominal cavity at the beginning of a laparoscopic operation. The need of such a system is mostly recognized in re-operation cases and in operations on overweight patients with lots of fat tissue. A sensor (3) capable of measuring vibration during punctures is placed and coupled on any location on the needle (1) and is protected against thermal and/or mechanical interactions. Initially the puncture information is relayed to the user of the system via a visual display such as an oscilloscope (6). A computer (8) with communication capabilities (I/O cards) or other means of processing could be added to the system. With the use of a computer (8) the signal can be processed and transformed to other means of display: colour leds, graphs, an audio indicator (change of tone, volume etc...) or a haptic indicator. |
