Abstract: An endoscopy steering structure includes at least two pull strings and a steering module, and the pull string has a lower half of the pull string and an upper half of the pull string, and the steering module is connected to a lens module and a flexible detection tube, and the steering module has first and second hollow gears and a bending rib. The first hollow gear has first and second gullets, and tooth roots at the bottom of the first and second gullets abut the lower half of the pull string. The second hollow gear is next to the first hollow gear, and the second hollow gear has third and fourth gullets, and tooth roots of the third and fourth gullets abut the upper half of the pull string. The bending rib is integrally connected to the first and second hollow gear and bendable in both clockwise and anticlockwise directions.

Abstract: A system for monitoring patient control analgesia (PCA) is provided. The system is used with or without a web page at bedside or a remote end. With the system, patients obtain good pain caring; doctors are provided with abundant reference data; and vendors get controls on device logistics.