Design Of Wireless Sensor Network System For Medical Catheter

At present,it is very common to inject or discharge liquid and gas through hose in the medical field,and it is still the main means to treat diseases.In this process,the circulation in the medical catheter often leads to abnormal circulation due to the movement of patients,and even serious situations such as backflow and blockage.However,the medical staff often cannot find the abnormality at the first time.If it is not handled in time,it may even endanger the safety of patients.The traditional coping style requires medical staff to patrol frequently or the patient’s family members to give problem feedback.Obviously,this method needs to consume a lot of energy and waste a lot of time for long-term monitoring between medical staff and family members,which is difficult to meet the needs of the modern medical system.Aiming at the above problems,this paper adopts the thinking of Internet of things,abandons the traditional manual monitoring,and designs a set of wireless sensor network monitoring system by combining Zig Bee wireless communication technology and embedded technology.This paper includes the selection of wireless network technology,the design of system hardware,the preparation of flexible sensors,the preparation of system software and the construction of host monitoring system,in order to build a complete system from terminal measurement to host monitoring.The design structure of the system includes the host monitoring center and terminal equipment.The terminal equipment contains a sensor connected to the medical catheter,which can timely receive the resistance information collected by the sensor and process the data,upload it to the monitoring system through the wireless network,the monitoring system calculates and simulates the catheter deformation,and alerts and alarms when there are extreme data changes.The combination of wireless communication and embedded technology makes the system reliable,safe and operable.This paper focuses on the selection of wireless communication technology and supporting hardware equipment,the preparation of flexible sensors and the preparation of software system.The Zig Bee wireless communication technology selected by the system has low cost and low power consumption,which ensures the power saving and smooth communication of each node of the network.The supporting equipment of the system node uses CC2530 and corresponding circuit equipment as the main control.The design is simple and convenient for the personalized setting of terminal functions.In the preparation process of the flexible sensor,the friction method is directly carried out on the medical catheter.The high-performance strain sensor is prepared with graphite material,which is combined with the data processing module of the terminal node to form a complete node equipment.The system software meets the three-tier structure of the system: terminal node,coordinator and host computer.In the software design process of the wireless network part of the system,IAR software programming is used to build the transmission structure of the terminal node and coordinator.The monitoring part of the system is designed directly on the host computer to meet the deformation monitoring of the medical catheter.The final designed system realizes wireless and miniaturization,and can monitor the catheter state in the medical environment without installing large-scale hardware equipment around the catheter.Moreover,the wireless sensor network system designed in this paper also has high operability,which is not limited to the data acquisition of the flexible sensors on the outer wall of the medical catheter.All signal acquisition sensors have been debugged,through this system,remote measurement and rapid data collection can be achieved.