Honeywell Sensing - Medical Solutions for Hemodialysis Machines
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SOLUTIONS FOR HEMODIAL YSIS MACHINES Sensors and Switches Application Note Honeywell manufactures many sensors and switches which may be used in hemodialysis machines (see Figure 1). This application note shows how these solutions provide dialysate cartridge presence/absence detection, fluid pressure/flow and temperature measurement, and smooth motor control output. BACKGROUND Hemodialysis machine treatments replace some kidney functions by removing waste and fluid from the bloodstream via diffusion and osmosis of solutes and fluid across a semipermeable dialysis membrane. Honeywell sensor and switch solutions are designed to enhance the performance and reliability of hemodialysis machines and ensure the safe administration of the treatment to the patient (See Figure 1). Blood in one compartment is pumped along one side of the membrane while a dialysate (a crystalloid solution that acts as a sponge for impurities) is pumped along the other side, in a separate compartment, in the opposite direction. Ultrafiltration occurs by increasing the hydrostatic pressure across the membrane by applying a negative pressure to the dialysate compartment of the dialyzer. This pressure gradient causes water and dissolved solutes to move from the blood to the dialysate. The cleansed blood returns via the circuit back to the body. SOLUTIONS FOR HEMODIALYSIS MACHINE APPLICATIONS • Force Sensors • Pressure Sensors – Board Mount • Pressure Sensors – Heavy Duty • Flexible Heaters • Temperature Sensors • Magnetic Position Sensor ICs • Basic and AML Switches • Barcode Scan E

Figure 1. Solutions for Hemodialysis Machine Applications OVERVIEW MEMBRANE DETAIL Blood pump Vein Artery Mixing tank Dialysate pressure Water Concentrate 3 Pressure control valve 3 Artificial kidney Pump Membrane Dialysis Membrane Bubble trap Venous pressure Bubble trap 1 Compressed air and carbon dioxide 2 Fresh dialysate cartridge 4 Constant temperature bath MicroForce FMA Series, 1865 Series, FSA Series, TBF Series 2 Pressure Transducers - Heavy Duty 13 mm Series, 19 mm Series, MIP Series Pressure Sensors - Board Mount 3 TruStabilityTM, HSC Series, SSC Series, TSC Series; Basic ABP/ABP2...

PRESSURE SENSORS AND TRANSDUCERS Board Mount: TruStability® HSC. SSC, TSC, Basic ABP Series; 26PC Flowthrough Series Heavy Duty: MIP Series; 13mm/19mm Series Functions/Actions • Monitor and regulate the dialysate flow on the outside of the dialysis filter to enable the filter to capture contaminates within the blood • Improve treatment efficiency and reduce the time it takes to remove fluid from the peritoneum Honeywell’s board mount pressure sensors and heavy duty pressure transducers (see Table 2) are designed to provide enhanced performance and reliability. Board mount pressure sensors...

FLEXIBLE HEATERS TEMPERATURE SENSORS MAGNETIC SENSORS A3100 Series, C3100 Series, A3200 Series, C3200 Series, A3400 Series C3400 Series in Custom Assemblies • Temperature measurement across the dialysis membrane • Control motors and sense motor speed Temperature directly affects the permeation rate across the dialysis membrane. The 192 Series and 194 Series thermistor sensing elements (see Table 4) provide temperature measurement for enhanced control of this variable. The sensor is coupled to a microcontroller designed to monitor the temperature of the operation and to interact with the...

BASIC AND AML BARCODE SCAN PUSHBUTTON SWITCHES ENGINES & SOFTWARE V15W, ZD, ZW Series; AML Series • Used as on/off operator controls, as well as detection for covers, panels and doors • Barcode scan engines and software help ensure the right treatment is administered to the right patient by reading the barcodes on the IV bag and on the patient wrist band. Honeywell MICRO SWITCH basic switches (see Table 6) can be used as on/off operator controls. MICRO SWITCH basic switches can also be used as presence/detection for covers, panels and doors acting as a fail-safe to prevent switching the...

IMPROPER INSTALLATION • Consult with local safety agencies and their requirements when designing a machine control link, interface and all control elements that affect safety. • Strictly adhere to all installation instructions. Failure to comply with these instructions could result in death or serious injury. FOR MORE INFORMATION Honeywell Sensing and Internet of Things services its customers through a distributors. For application assistance, current specifications, pricing, or the nearest Authorized Distributor, visit sensing.honeywell.com or call: +1 305 805 8188 Greater China...