Designing a Patient-Connected Blood Infusion System

An engineer at a medical device manufacturer was tasked to design a patient-connected blood infusion system. One of the mandatory requirements for this application was for a sensor to be capable of detecting unwanted air bubbles which could potentially become present in the intravenous blood tubing line. This sensor was to alarm immediately as a bubble would pass by. The engineer chose an air bubble sensor which operated using optical technology. He quickly realized that although the optical sensor would alarm on some bubbles, the blood which would stain the inside of the tubing was actually masking bubbles, thus allowing them to pass by undetected. If this were to happen during a medical procedure, the undetected air entering a patient's circulatory system could cause an air embolism which could harm the patient. This engineer knew he had to find a reliable solution.

The AD-101 series, a non-invasive ultrasonic air bubble detector, provided repeatable detection of all air bubbles passing through the flow path of the tubing. The ultrasonic bubble detector was able to sense every air bubble flowing through the tubing even with discoloration or coating of blood present on the tubing's inner walls. The AD-101 operates with high reliability and its detection capabilities are independent of optical or dielectric properties of the tubing and liquid. The air bubble detector quickly became the sensor of choice for this manufacturer's infusion pump system and is now installed in all of their production devices. The AD-101 sensors are used widely in critical applications including medical and lab automated instrumentation as well as in other industries. These bubble detectors can be customized to exact electrical and mechanical specifications.

Comments

Post a Comment

Popular posts from this blog

Lenze 8400 Protec Tailored for Decentralized Applications and Integrated Positioning

Lenze Americas, a leading global manufacturer of electrical and mechanical drives, motion control and automation technology, announced today the release of the Plug and Drive 8400 protec frequency inverter drive for decentralized applications and those requiring integrated positioning. "For decentralized applications that require precision positioning, the 8400 protec frequency inverter is in the right place—mounted on the line or wall adjacent—ready to start, on the spot,” says Darrow Hanesian, Global Director of Inverter Products, Lenze Americas. The Lenze 8400 protec inverter ships ready to install with innovative Plug and Drive Technology, in addition to standard mains, motor, brake and communications connectors. All terminals of the 8400 protec, ranging from the shielded motor cable to the power supply and the fieldbus link, and including the terminal for the sensors, are equipped with standardized connectors to reduce installation time and increase plant availability a...
Read more

8400 HighLine Joins Lenze L-Force 8400 Inverter Drives for Motion Control

Lenze Americas, a leading global manufacturer of electrical and mechanical drives, motion control and automation technology, has launched the new 8400 HighLine Inverter Drives, part of the Lenze L-force 8400 portfolio. Designed for positioning applications, the HighLine model features integrated point-to-point positioning for up to 15 position destinations, and stores the corresponding travel profiles directly in the inverter. “Positioning in motor drive systems used to require a separate motion controller. Most applications don’t require a higher cost servo drive. Dynamic speed, torque and precision motion control can be achieved with a powerful inverter in combination with an asynchronous motor,” states Darrow Hanesian, director of inverter products, Lenze Americas. “Our streamlined HighLine delivers all the cost savings and benefits of combining two drive elements—the motion controller and the frequency inverter — into one.” The HighLine inverters’ integrated components transl...
Read more
Beko Oil-Vapour Monitor Gains TUV Certification Beko's Metpoint OCV oil-vapour monitoring system for chemical and pharmaceutical production processes has been certified by TUV Nord in accordance with the requirements of ISO 8573-1, Classes 1 to 4. According to the company, even 'oil-free' components give no guarantee for 'oil-free' compressed air, owing to the contamination of the ambient air/intake air. In most cases, a certain residual oil content cannot be entirely avoided in standard applications. The precise monitoring of the oil-vapour content, which is possible at any time, is important. In particular, in critical production processes in the chemical and pharmaceutical industry, in food production and surface coating, the analysis and control of compressed-air quality is a crucial factor, according to Beko. The network-compatible Metpoint OCV offers constant monitoring down to the range of a thousandth mg/m3 and features a touch-screen display and 24/7 pr...
Read more