Anesthesia Delivery System

Anesthesia Delivery System Solutions from Texas Instruments

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Design Considerations

Anesthesia Delivery System Solutions from TI

An Anesthesia Delivery System is used to select, mix and deliver controlled concentrations of oxygen and anesthetic gases to a patient.

Pressure sensors play an important role for respiration equipment by converting physical values such as airway pressure and flow into a differential signal. The accurate processing of these signals is life critical. The air and oxygen flow sensors generate signals to help the microprocessor control the valves to deliver the desired inspiratory air and oxygen flows. The airway pressure sensor generates the feedback signal necessary for maintaining the desired positive end expiratory pressure (PEEP). Often, the sensors are very cost-effective with large offset and offset drift causing the signals to be over or under scaled, temperature variant and non-linear. Amplifiers with low offset voltage and drift over time and temperature as well as low-noise and a high common-mode rejection ratio are ideal for signal conditioning.

A number of control design strategies may be appropriate for the control of the air and oxygen flow delivery valves. The microprocessor performs multiple operations including sampling the pressure signals, computing a desired airway pressure and total inspiratory flow level and actuating the air and oxygen valves for each individual inspiratory cycle. To achieve these operations efficiently and in real-time, a high-speed, low-power, highly-integrated microprocessor is needed. DSPs can be used for such demanding control applications. A DSP can also provide fast interrupt response and processing and simultaneous conversions.

Some anesthesia delivery systems are equipped with compressed-gas tanks and backup batteries to provide ventilation in case of power failure or defective gas supplies. It is important that the battery management components accurately assess the energy levels to ensure safety and reliability. Ideal parts include Impedance Track™ technology that measures and maintains a more accurate record of available charge in the battery using its high-performance analog peripherals.

If functional safety certification is required, Hercules™ Safety MCUs are built to ease the development and certification of safety critical systems to the IEC 61508 safety standard. Based on the ARM® Cortex™-R4F core Hercules MCUs provide floating point, SIMD and DSP capability. Hercules MCUs include up to 3MB of flash, 12-bit ADCs, flexible HET Co-Processor and communication peripherals such as USB, Ethernet and CAN that enable the MCU to act as a safe networked controller.

Application Notes (3)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 06 Sep 2011 387
HTM 9 KB 09 Sep 2008 1439
HTM 9 KB 26 Jun 2008 257
    

Reference Designs

Description Part Number Company Tool Type
CC1101EM 315 and 433MHz Reference Design CC1101EM433_REFDES Texas Instruments Reference Designs
CC1101EM 868 and 915MHz Reference Design CC1101EM868-915_REFDES Texas Instruments Reference Designs
CC1110EM 315MHz Reference Design CC1110EM315_REFDES Texas Instruments Reference Designs
CC1110EM 433MHz Reference Design CC1110EM433_REFDES Texas Instruments Reference Designs
CC1111 USB Dongle Reference Design CC1111USB_REFDES Texas Instruments Reference Designs
CC2500EM Reference Design CC2500EM_REFDES Texas Instruments Reference Designs
CC2510EM Reference Design CC2510EM_REFDES Texas Instruments Reference Designs
CC2511 USB Nano Dongle Reference Design CC2511NANO_REFDES Texas Instruments Reference Designs
CC2511 USB-Dongle Reference Design CC2511USB_REFDES Texas Instruments Reference Designs
CC2520EM Reference Design CC2520EM_REFDES Texas Instruments Reference Designs

Selection and Solution Guides

Selection Guides (3)

Title Abstract Type Size (KB) Date Views
PDF 6.63 MB 06 Jan 2014 26613
PDF 9.09 MB 02 May 2013 3420
PDF 11.49 MB 05 Aug 2010 1076

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio (CCS) Integrated Development Environment (IDE) CCSTUDIO Texas Instruments SW Development Tools, IDEs, Compilers
HAL Code Generator tool HALCOGEN Texas Instruments SW Development Tools, IDEs, Compilers
MSP430 USB Stick Development Tool EZ430-F2013 Texas Instruments Evaluation Modules & Boards
MSP430F5438 Experimenter Board MSP-EXP430F5438 Texas Instruments Evaluation Modules & Boards

Product Bulletin & White Papers

Product Bulletin (1)

Title Abstract Type Size (MB) Date Views
PDF 208 KB 25 Jul 2008 179

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