Design And Development Of Portable Digestive Endoscopy Host System

ObjectiveThe stress-related gastrointestinal diseases in the special circumstances such as the field environment,military medical service,and disaster relief have a high tendency,which seriously affects the physical and mental health of the troops,victims,and rescue personnel,and is one of the main reasons that lead to the non-combat reduction in combat effectiveness of troops.At the same time,abdominal trauma such as abdominal open trauma,intestinal perforation,gastrointestinal bleeding,and ruptured liver and spleen often occurs in wars and natural disasters.Digestive endoscopy can provide an effective way for the diagnosis and treatment of gastrointestinal diseases and abdominal trauma in field medical cwere and disaster relief.However,the existing digestive endoscopy equipment is bulky,not easy to carry and needs to rely on the supply of commercial power and central vacuum suction system to work,and can not meet the needs of endoscopy treatment under the mobile environment such as field operations and disaster rescue.This study intends to combine the structural composition and imaging principle of the electronic endoscope system,and utilizes the technical experience in the development of integrated endoscopy systems at home and abroad to design and develop a highly integrated,functionally complete,lightweight,easy to carry and use,suitable for mobile.The portable digestive endoscope host system for operation provides technical services for improving the diagnosis and treatment of digestive tract diseases and abdominal trauma under the conditions of field operations,military medical services and disaster relief.MethodsBased on the relevant literature,combined with the system configuration and imaging principle of digestive endoscopy,the portable digestive endoscopehost system was designed and developed.The portable digestive endoscope mainframe system mainly includes a suitcase-type airframe and a host internal work attachment.We designd the suitcase-type airframe and the internal working parts of the mainframe respectively,and finally carried out system integration.The portable digestive endoscope host system is mainly composed of light source lighting,image processing and display,air pump,and vacuum suction and power supply batteries.The performance parameters of the above modules were analyzed,and these with small size,low power,good safety,and stable performance were selected.In order to verify the compatibility of the host system,the accessories were sequentially connected and subjected to imaging tests.Through comparison of the box materials,we choose light and strong materials to make the portable digestive endoscope host system shell to ensure the system's lightness and robustness.In accordance with the scheme of maximizing space utilization,the internal system arrangement and circuit layout of the host system were integrated and integrated into the main chassis.Thus,a new type of small size,light weight,low energy consumption,independent power supply,portability and mobile operation is developed.Digestive endoscopy host system.The use of a portable digestive endoscopy host system with an interconnected electronic gastroscope for upper gastrointestinal endoscopy of the patient to test the initial application of the portable digestive endoscopy host system.ResultsThe overall design idea of the portable digestive endoscope host system was to simplify several parts of the digestive endoscopy system into several modules.The modular design concept is used to split,replan and reintegrate the original digestive endoscopy system,and to integrate light source lighting,image processing,image display,air delivery,suction,and battery power in a host.In order to realize the effect of high-efficiency lighting,a new type of LED light source with stable luminescence performance,small volume,low heat generation and low energy consumption is selected as a lighting device of a portable digestive endoscope system through parameter analysis,and the LEDis encapsulated with epoxy resin under the same optical lens group in parallel with the shape of the field,and cooled by fan-shaped heat sinks and fans to ensure that the light source is in proper working conditions and the luminous efficiency is improved.By comparing and screening a variety of mainstream micro-pumps,the DP0102H-X2 miniature air pump with high airtightness,low noise,low vibration,light weight and stable performance is used to compress air to achieve the purpose of air delivery and water delivery.The performance test results show the air pump performance.Well,there is no significant change in the size of the generated bubbles,and the water flow from the tip of the lens is straight and there is no interruption.Taking the negative pressure suction system as the reference,a small peristaltic pump with a small volume,compact structure,and good stability,KCS type(maximum flow 300ml/min)is used to achieve negative pressure suction function.We used high-performance lithium polymer batteries to provide power support for portable digestive endoscope host systems,performance parameters of several commonly used cathode materials for the preparation of lithium batteries were compared,and iron phosphate Lithium of high energy density,long cycle life,good safety properties is selected to make a lithium battery,and the final capacity of the lithium battery is determined to be 15 Ah according to the working time.Performance test results indicate that the remaining battery capacity of the lithium battery decreases linearly with the working time.The actual working time of the lithium battery is in accordance with the calculated theoretical value.Lithium battery open circuit voltage gradually decreases with the increase of working time,the minimum is 22.2v.The D2846 image processor which is developed by Shanghai Aohua Opto-electronics Endoscope Co.,Ltd.was developed as a core component of the portable digestive endoscope host system,including an image processing system and a control system.It can process digital signals captured and converted by CCD and deal with the overall system control.In order to realize the portability of the display device,the light and thin portable display is selected to match with the image processor,and the digital signal transmission throughthe HDMI video signal interface can ensure clear diagnostic images and surgical field of vision.The host system components were connected in sequence and the imaging test is performed.Each component of the host system is started normally,and the working state is stable.The brightness of the LED light source,the air pump,and the peristaltic pump flow can all be arbitrarily adjusted through the control panel,and the captured text image is clear and can be controlled.The panel performs operations such as white balance,outline emphasis,image freeze,and brightness adjustment on the image output from the monitor.We analyzed mechanical parameters of several commonly used medical equipment housing materials,and compare them from several major aspects of specific gravity density,elastic modulus,tensile strength and yield strength,and select aluminum-magnesium alloy with light-weight,high-strength,strong and durable characteristics to make portable digestive endoscope mainframe body shell.The body of the host computer adopts a suitcase-type design,and an image processing module,an image display module,a light source module,a pressure module and a power supply module.They were integrated inside the box body and the portable display is integrated in the box cover.The box body and the box cover were matched to each other to protec of internal components.Through the integrated design we made the internal structure of the host more compact,easy to carry and use.Following the principle of maximizing internal space utilization,the module arrangement and circuit layout were performed to shorten the connection between the accessories and make the internal structure of the host.More compact and focused.The portable digestive endoscope host system has a size of 464(length)x358(width)x 195 mm(height)and a weight of about 21 kg.It is lightweight,convenient for single-person carrying,and can be used with an electronic endoscope if necessary.In order to test the preliminary application effect of the portable digestive endoscopy host system,the upper digestive tract endoscopy was performed on the patient with the VME-98 electronic gastroscope.The portable digestive endoscope host system has a good working condition and can fill the stomach cavity in a short time.Extensive exposure of the gastricmucosa,while the effective suction of the gastric fluid,to ensure a clear observation of the field of vision,the monitor output image is stable,clear,adequate brightness,to meet the general diagnosis and treatment needs of digestive endoscopy.Conclusion1.We successfully designed and developed a portable digestive endoscope host system to ensure the functional integrity of the portable digestive endoscope host system by integrating the distributed host,display,power supply system,and vacuum suction system.No need for trolleys and any external equipment,associated electronic endoscopes can work independently and have strong practicality.2.Through the suitcase-type integrated design,the miniaturization and energy saving of the portable digestive endoscope mainframe system were realized.The portable digestive endoscope host system has characteristics such as lightweight and portable,rapid development,energy saving and power saving,and movable operation,and is suitable for field environments and military medical services.It is easily carried and used in special environments such as disaster relief.3,The portable digestive endoscopy host system which is stable and simple to operate,can meet the needs of the diagnosis and treatment of digestive tract diseases in the mobile medical environment,with the potential for clinical conversion.