APLIKASI LOAD CELL UNTUK SISTEM MONITORING VOLUME CAIRAN INFUS

Infusion is very important for patients who need additional fluids in the body. Intravenous fluids are injected into the body using needles, through veins. Delayed replacement of IV fluids can pose a very high risk for the patient's condition. One of the risk is that the blood can be sucked back and flow in the IV tube, because there is a difference fluid pressure between the vein and the infusion bag. Therefore, controlling the volume of infusion fluid is very necessary so the infusion bag containing the intravenous fluid must not be used up.To minimize the risk is by replacing the IV bag that must be done in a timely manner. So to find out the amount of infusion fluid volume in the infusion bag it will be designed and realized an instrument that can measure the volume of infusion fluid by weighing the weight of the infusion bag. This tool can stop the flow of IV fluids that flow into veins when the IV fluid will be depleted.The result of this research is that the system will stop the infusion fluid flow by activating the pinch valve by clamping the infusion hose so that the fluid can stop when the infusion fluid volume will run out. Discontinuation of infusion fluid occurs when the remaining infusion fluid volume is 10 mL

A Novel Approach of Controlling Stoppage of Drip Infusion Using Image Processing on Raspberry PI Platform

Intravenous drip diffusion is a common practice to treat patients in hospitals. During treatment, nurses must check the condition of the infusion bag frequently before running out of fluid. This research proposes a novel method of checking the infusion bag using an image processing technique on a compact Raspberry PI platform. The infusion monitoring system proposed here is based solely on capturing the image of the infusion bag and the accompanying bag/ tube. When the infusion fluid enters the patient, the surface of the liquid will decrease, and at the end will reach the bottom of the infusion bag. When the image of the fluid surface touches the bottom of the infusion bag, a mechanism will trigger a relay, and then activate a pinch valve to stop the flow of the infusion fluid before it runs out. The entire system incorporates a digital camera and Raspberry as the image processor. The surface of the liquid is determined using the Canny Edge Detection algorithm, and its relative position in the tube is determined using the Hough Line Transform. The raw picture of the infusion bag and the processed image are then sent via a wireless network to become part of a larger system and can be monitored via a simple smartphone equipped with the proper application, thus becoming an Internet of Things (IoT). With this approach, nurses can carry on other tasks in caring for the patients while this system substitutes some work on checking the infusion fluid.

Utah-Stanford Ventilator (Vent4US): Developing a rapidly scalable ventilator for COVID-19 patients with ARDS

We describe a minimum, rapidly scalable ventilator designed for COVID-19 patients with ARDS. Our design philosophy is not only to try to address potential ventilator shortages, but also to account for uncertainties in the supply chains of parts commonly used in traditional ventilators. To do so we employ a modular design approach and broadly explore taking advantage of parts from non-traditional supply chains. In our current prototype, we demonstrate volume control with assist control on a test lung and present a linear actuator-driven pinch valve-based implementation for both pressure control and volume control with decelerating inspiratory flow. We estimate the component cost of the system to be around $500. We publish our draft design documents and current implementation which is open and accessible in the hope that broadening the community globally will accelerate arriving at a solution and that peer review will improve the final design.

Design & Development of Contactless Valve for Adhesive Fluid Flow

Valves are the components in a fluid flow or pressure control system that regulates either the flow or the pressure of the fluid. Pinch valve is control and shutoff valve, used for slurry application where abrasive or corrosive, powders or granular substances are present. The Objective is to design and manufacture a contactless dispensing valve to avoid curing and rapid hardening of the adhesive/high viscosity fluids, using pinching effect between the flowing fluid and the tube in contact. Validation of this design is done through analysis. The methodology to achieve this objective will be first to define the problem definition. After defining the problem, the literature survey is done on various methods that are already in market and a detail study on the solution or the way to achieve the solution. Design of the valve is done based on the pinching effect. Model is prepared in SolidWorks software and analysis is done in Ansys software. Testing of the valve is the most crucial part for the valve to sustain the design and the parameters. The expected outcome from this paper is to design and manufacture a valve for high viscosity fluid to flow with high pressure and without any curing, metal life will be increased because there is no contact between metal and the fluid. Due to the pinching effect used, the wastage of fluid will be avoided

FEM Analysis and Structure Improvement of Pinch Valve

Pinch valve is an important flow adjusting device in the operating system of polymer materials with characteristics of high viscosity and high solid content, and its service life limits its application and popularization. In this study, for the special application environment and requirements of clevis pinch valve in the operating system, the dual-parameter Mooney-Rivlin constitutive model of rubber and Linear Elastic model of clevis were used. The stress and strain distributions of the rubber hose, while completely closed, were obtained by means of FEM (Finite Element Method) analysis. Parameters of hose thickness and cone length of the rubber hose were optimized, and the structure-improved pinch valve was obtained as well. The strain energy release rate and fatigue life were analyzed for the improved rubber hose at the most dangerous cell.

Investigation of Different Liquid Silicone Rubbers for Micro Pinch Valves

A novel pinch valve has been developed for micro fluidic applications. It has significant advantages regarding dead volume, pressure tolerance, replaceability, scalability and dosage frequency in comparison to competing valve principles and other pinch valves. The transfer of the valve from laboratory sample to an industrial usage required particularly a modification of the tubes. A new geometry has to be developed and sufficient tube material has to be identified. Different silicone rubbers were examined in the course of prototype manufacturing. Preliminary investigations were carried out to qualify the manual manufacturing of the silicones, according to the manufactures specification. Based on these results, the new developed tubes were manufactured and compared to its technical properties. The required parameters were achieved by using heat-cured silicone elastomer. Preliminary dosage tests of the final developed pinch valve had shown good results and satisfy industrial specification.