A Look at the Medical Electronics Industry Testing Analysis and Solution
Article by: RIGOL Technologies
With stricter EMC standards, all manufacturers of medical electronic equipment must think about electromagnetic radiation indicators at the R&D stage to improve the electromagnetic compatibility of their products.
With the aging of the global population, rising healthcare costs as well as growing demand for medical diagnostics and treatments from emerging developing countries, the global demand for medical electronics will increase. Amid recent economic development and nation building, the focus continues to be on improving the health care system for society as a whole. The global medical electronics market demand is also showing a rapid and stable development stage.
This continuous demand has greatly boosted investment in the field of medical electronics, with manufacturers of medical electronic equipment constantly improving the technological level and developing innovative applications which promote stable development of the global medical electronics industry.
On the current global constitution of medical electronic products, the products of American and European companies occupy a dominant position, followed by Japan on a number of professional projects. The medical electronics industry in developing countries has started late due to a weak base, their products are mainly concentrated in low-end products, and high-end equipment is seriously dependent on imports. But with the rapid increase in R&D, as well as the market orientation from high-tech to universal, product competitiveness is gradually increased, there have been a number of core competitiveness enterprises with l advantage of digital medical imaging and in vitro diagnostics. With a high investment environment and faster product cycle, how to improve test efficiency and reduce test development costs should also be considered at the product development stage.
Analysis of test technology
RIGOL Technologies can provide customers with comprehensive and cost-effective test measurement instruments, which can meet the testing requirements of medical electronic equipment companies and reduce capital investment in the early stages of pre-research to accelerate development cycles. product development. Here we have focused on the testing analysis of high frequency electric knife and breathing apparatus in the development stage, to help you understand the testing application of RIGOL instrument products.
What developments have taken place in the medical electronics sector? What technologies are in the works? How do technology providers help manufacturers improve their processes? All this and more in this month’s In Focus series.
Product Testing Overview
High frequency electric knife test analysis
High Frequency Electric Cautery Knife (HF Surgical Device) replaces electrosurgical instrument organized by mechanical cutting scalpel. Due to the high frequency electric knife can be cut and coagulated at the same time, in the mechanical scalpel surgery, difficult access and implementation (such as: abdominal pipeline ligation, prostatic urethra tumor resection), it is universally applied. Due to its high precision, and therefore for the power waveform, voltage, current and other safety indicators require rigorous testing. The output power test can be calculated by using an oscilloscope to test the output terminal voltage and output circuit current. The precision and accuracy of the output power adjustment is fundamental to ensure the safety of the surgery, so the precise degree of the adjusted output power of the high frequency electric knife can be accurately measured by a differential probe and an oscilloscope.
Figure 1 High frequency electric knife output power test
In addition, some high frequency electric knife manufacturers have humanized and personalized design. According to human tissue impedance monitoring and neurophysiological stimulation pattern to determine the different parts and pain, adjust the treatment mode. So in the testing process, accurate simulation of human body resistance and nerve signals is necessary to test whether coagulation can produce accurate treatment frequency signal mode. So you can use high precision voltmeter test simulating impedance resistance and use waveform generator to simulate neural signal to test whether the coagulation output mode is accurate.
Figure 2 Simulate physiological stimulation mode
Fan test description
In modern clinical medicine, the ventilator as an effective means of artificial alternative replaces the function of autonomous ventilation in the field of modern medical science occupies a very important position. Usually in the test, the pipeline will be built in the ventilation fan pressure transmitter, the working pressure when the fan passage of the gas in the electrical output to an oscilloscope to display the voltage waveform changes. After a long monitoring, the conclusion that the pressure limits the access by the relation between the tension and the pressure, the key parameters respiratory rate, minute ventilation, etc.
picture 3 Fan stress test.
Introduction to portable mobile medical monitoring equipment communication test. With increasing internet coverage, an aging population, rising healthcare costs, remote monitoring and other new social conditions, this will enable medical devices to evolve towards portability and connectivity. The future mobile Internet health sector will enter a very rapid development phase.
Figure 4 Communication test of remote monitoring equipment.
Figure 5 Wireless receive sensitivity and bit error rate test.
In the mobile Internet medical industry, the requirement of a medical device is not only to meet normal use, but also to meet stable communication. Wi-Fi, Bluetooth and other communication module testing become a key project of medical electronic equipment. Usually, the test project uploaded the signal carrier frequency offset, transmission power, reception end signal reception sensitivity and bit error rate and other parameters. Generally for the test of above indicators, we can provide test system including spectrum analyzer, RF signal source and oscilloscope for accurate and efficient test.
Overview of the ECG test
The electrocardiograph is an instrument for recording the ECG. It can automatically record biological signals (ECG) produced by myocardial excitation of cardiac activity. It is a common medical electronic equipment for clinical diagnosis and research. The ECG machine test usually requires an mV level signal, so we can use an arbitrary waveform generator to generate a low amplitude ECG signal to test the instrument.
Figure 6 Arbitrary waveform generator generates low amplitude ECG signal
Picture 7 Built-in arbitrary waveform generator multiple arbitrary waveforms
Electromagnetic compatibility pre-test of medical electronic products
With the development of medical electronic equipment technology, resulting in more and more complex electromagnetic compatibility environment, such as poor design of EMC performance of medical devices, it is easy to cause equipment malfunction, loss control and failure, endangering the health of patients and medical staff.
Figure 8 Near-field radiation test to determine source of interfering device.
With more stringent EMC standards, all manufacturers of medical electronic equipment need to think about electromagnetic radiation indicators at the R&D stage, or improve the electromagnetic compatibility testing of their products at the medical device inspection institute in order to ‘improve the rate of the product. Based on this, RIGOL can provide customers with a spectrum analyzer with EMI filter and quasi-peak detection function, and is equipped with a near-field probe to ensure electromagnetic radiation pre-test, it can accurately locate the source of interference and debugging. All test results are generated automatically via software.