One of the biggest trends in the medical device industry is miniaturization, which is to develop smaller, more portable devices to meet the limited space of hospital and home health care spaces, enabling healthcare professionals to quickly and easily move devices from one patient to another. At the office. Ventilator, diagnostic equipment, pumps and suction equipment are now being improved to accommodate this trend change. The development of the health care industry has made important contributions to the miniaturization of medical devices, especially in Europe and the United States, where they strive to convert patients from hospitalization to home care treatment as quickly as possible, while in home care treatment, portability is treated and used by patients. Equipment is vital, which helps them achieve the highest possible quality of life.
Device miniaturization is a challenge for medical device designers to not only reduce the size of their products, but also to design devices that enable a variety of configurations and care settings. As a result, sensor manufacturers are beginning to respond to the need for device miniaturization by offering flexible mounting options, smaller size, and integration of multiple sensor functions into one package. In some cases, some sensors have even been used in fields not previously covered, such as surgical instruments.
The sensor platform offers a variety of mechanical interfaces, mounting options, package types, and I/O options, enabling medical device designers to choose the right interface for their applications while reducing cost and board space. For example, pressure sensors can be integrated into a variety of designs because they offer a variety of connections (port styles), package styles (DIP, SIP, surface mount), and output (analog or digital) options.
Flexible sensor package options
The sensor's flexible package style (including manifold mounting and cable assembly options) allows designers greater flexibility in placing sensors on printed circuit boards (PCBs) and, in addition, eliminates piping and related connections The use of the medical device makes the shape of the medical device smaller, the design is simpler, and the assembly is faster. Flexible mounting options also ensure that the sensor is accurately placed in the desired position, ie close to the patient or liquid medium (eg blood, chemicals or water) for accurate and highly accurate measurements.
Pressure Sensor
The ability of the sensor to be placed close to the patient is critical for many applications, such as accurate dialysate and venous pressure in dialysis applications. The pressure sensor must be able to accurately monitor the pressure of the dialysate and blood to ensure it is maintained within the set range.
This type of application requires sensors that are small and capable of withstanding liquid media. In many cases, sensors that are not compatible with liquid media require additional mounting components to protect it, increasing the size, cost, and complexity of the product. Liquid medium tolerance is particularly important when monitoring patient breathing because the sensors here must be able to withstand the patient's cough and exhaled moist air.
For example, Honeywell's TruStability HSC/SSC board-mounted pressure sensor and 26PC flow-through pressure sensor are in direct contact with the liquid and quickly feed back the dialysate pressure while filtering the dialysate used by the patient. These sensors also offer a variety of port options and package designs for dialyzer manufacturers.
Caption: TruStability of Honeywell Sensing and Control? Board-mounted pressure sensors offer a range of mechanical interfaces, mounting options and I/O options, as well as liquid media compatibility options, enabling medical device designers to choose the right interface and package to reduce board space.
Sensor for wound care
Negative pressure wound therapy is another application that benefits from the miniaturization of pressure sensors that provide high reliability and superior quality while minimizing product costs. By platforming, medical device manufacturers can use the same basic sensors in a variety of wound care products, and designers can scale the output to meet the specific needs of the application. For example, Honeywell's NBP Series boards are equipped with a basic pressure sensor that offers a range of package types, pressure ranges, housings and port options that make it easier to integrate into medical devices while considering cost. Packaged in a 7 mm x 7 mm space, the NBP Series sensors meet the space requirements of portable home health care products.
Caption: Honeywell's NBP Series Board Mount Basic Pressure Sensors are small and easy to place on tightly spaced printed circuit boards or small devices. A range of package types, pressure ranges, housings, gel coats and port options are available to meet the specific application needs of medical designers.
Contact force sensor
The force sensor is used in medical applications (such as infusion pumps, etc.) to measure the pressure in the drug delivery tube. These sensors feature piezoresistive technology and are small enough to provide accurate and reliable sensing (100 ppm). The sensor's high sensitivity to pressure changes allows it to detect clogging problems as early as possible and promptly sound alarms to notify health care providers, thereby increasing patient safety. The range of these sensors can also be scaled to different pressure ranges, including 0 to 11â„2 lbf (FS01) and 0 to 3 lbf (FS03), and pre-verified for multiple ranges for greater design flexibility.
The force sensor is available in a variety of package types and can be mounted to the equipment piping in a variety of attachments, providing maximum flexibility, especially in infusion pumps and dialysis applications. Honeywell's FSS, FSG and FS01/FS03 series of force sensors are available in a variety of package types and sizes, making them easy to integrate into space-constrained infusion pump applications and more portable, improving patient quality of life. In addition, Honeywell's FSS and FSG force sensor product lines have added wing-shaped leads, enabling medical device manufacturers to change from through-hole design to surface mount design, which is more conducive to current high volume production.
Integrated component
Some sensors, such as temperature sensors and humidity sensors, integrate multiple functions, which further promote the miniaturization of the device, with a variety of assembly and manufacturing advantages, including:
- Simplifies device design, manufacturing, and installation by eliminating multiple sensors on the board.
- Enhanced the functionality of the device.
- Increased patient comfort and safety: Since the device has an integrated sensor, the number of vulnerable parts and connection points is reduced, reducing the number of potential sources of failure.
- The design verification process is simpler by eliminating the board outline from the PCB to the microprocessor.
- Reduced total cost.
The intelligent device contained inside the sensor itself also contributes to the miniaturization of the product. For example, fully calibrated, temperature compensated, and amplified sensors reduce the number of parts required for a PCB, helping to reduce product size, weight, and cost. Typically, these designs do not require the use of resistors and amplifiers to compensate and calibrate the external components of the sensor signal. Because compensation and calibration are not required, manufacturers can eliminate the time and expense involved in the testing process and ultimately shorten the product development and production cycle.
Manufacturers can also further eliminate external resistors, capacitors, and amplifiers by adding a sensor digital interface option. The digital interface enables sensor signals to be directly connected to the microprocessor, saving board space for space-constrained medical device designs.
Caption: Honeywell's HumidIcon digital temperature and humidity sensor provides two functions in a small package for greater miniaturization.
For example, Honeywell's HumidIcon digital temperature and humidity sensor provides a temperature-compensated digital I2C output that eliminates signal conditioning related components on the PCB, reducing board space and the costs associated with these components. . This not only simplifies the integration of the sensor and the microprocessor, but also eliminates the problems associated with multiple signal conditioning components on the PCB.
The sensor is available in an ultra-small SOIC-8 surface mount package in two configurations: filterless, non-condensing HIH-6130 and HIH-6131 with water blocking filter and anti-condensation. These sensors can operate at voltages as low as 2.3V and can be used in low power applications to extend battery life, which is critical to the portability of the device.
Platform sensor
Platform-based sensors are available in a variety of port types, mounting styles, voltage ratings and output formats (digital or analog) for a variety of medical applications. Its flexibility allows designers to select the right sensor for their application without the need for expensive custom components, while also making it easy for engineers to make changes to their equipment design and specifications. Often this combination of options reduces potential additional costs and speeds time-to-market.
This platform approach can accommodate many of the special needs of medical device design, including device size and shape. The sensor platform building block pre-verifies all standard options and configurations, helping to provide customers with high quality and reliable products from the start, while also speeding up R&D and manufacturing.
Sensor manufacturers can help designers design medical devices for today's medical environments. Whether it's hospitals or home care devices, product size, ease of use, portability, reliability, precision and cost are paramount. As they strive to develop increasingly smaller devices, designers must understand the type and range of pressures required for their application, accuracy, supply voltage, package requirements, and output type so that they can choose the most appropriate sensor for their specific application. In addition, they need to know the liquid medium that the sensor may touch to select a sensor that is compatible with these fluids. Because sensors come in a range of sizes, packaging options, assembly options, port types, and outputs, they can be used in a variety of applications.
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