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Infusion Pump

Infusion Pump Solutions from Texas Instruments

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AC/DC Adaptor

Design Considerations

Infusion Pumps are an effective pathway for delivering fluid, blood, and medicants to a patient's vital organs. Since the entire blood supply in a human body completely circulates within 60 seconds, substances introduced into the circulatory system are distributed rapidly. An infusion device typically consists of three major components: the fluid reservoir, a catheter system for transferring the fluids into the body, and most importantly, a device that combines electronics with a mechanism to generate and regulate flow. This regulation of the drug concentration in the body to achieve and maintain a desired result is highly critical, especially if prolonged underinfusion or overinfusion takes place. Although underinfusion may not provide sufficient therapy, overinfusion can produce even more serious toxic side effects.

The infusion of drugs requires high flow rate accuracy and flow uniformity. Sensors can be used to count the number of drops passing through the drip chamber to provide flow feedback for automatic rate adjustment and to detect any downstream occlusions directly below the pumping mechanism. However, flow rate accuracy remains limited by the rate and viscosity of the drip as well as improper angulation if in motion. Flow uniformity can also suffer at low flow rates from the discrete nature of the drop detector. Despite these limitations, a processor with an advanced graphical user interface, smart and real-time physiological processing, and wired and wireless connectivity options for patient monitoring and data logging applications provides an additional level of safety by quickly detecting complications and generating an alarm.

One alternative to the drop sensor is a volumetric metering chamber. A pump with a stepper or servo-controlled dc motor can be used to provide the driving force for the fluid by mechanized displacement of the contents in the volumetric chamber. The stepping resolution along with the chamber elasticity can influence the flow uniformity. When the volume is not uniform over the mechanism's cycle, software control can be used to compensate for the variation.

Application Notes (1)

Title Abstract Type Size (KB) Date Views
HTM 9 KB 26 Jun 2008 1355

User Guides (2)

Title Abstract Type Size (KB) Date Views
htm 8 KB 07 Jul 2010 888
htm 8 KB 20 Jan 2010 1033
    

Reference Designs

Description Part # Company
CC1110EM 315MHz Reference Design CC1110EM315_REFDES Texas Instruments
CC1110EM 433MHz Reference Design CC1110EM433_REFDES Texas Instruments
CC2500 Reference Design (62 mil layer spacing) CC2500_REFDES_062 Texas Instruments
CC2500EM Reference Design CC2500EM_REFDES Texas Instruments
CC2511 USB Nano Dongle Reference Design CC2511NANO_REFDES Texas Instruments
CC2511 USB-Dongle Reference Design CC2511USB_REFDES Texas Instruments
CC2520EM Reference Design CC2520EM_REFDES Texas Instruments

Selection and Solution Guides

Selection Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 9.03 MB 02 Apr 2013 13116
PDF 11.49 MB 05 Aug 2010 3354

Solution Guides (1)

Title Abstract Type Size (KB) Date Views
PDF 3.94 MB 26 Oct 2012 24186

Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio (CCStudio) Integrated Development Environment (IDE) v5 CCSTUDIO Texas Instruments SW Development Tools, IDEs, Compilers

Product Bulletin & White Papers

Product Bulletin (2)

Title Abstract Type Size (MB) Date Views
PDF 208 KB 25 Apr 2011 1999
PDF 208 KB 25 Jul 2008 824

White Papers (2)

Title Abstract Type Size (MB) Date Views
PDF 98 KB 08 Apr 2013 1036
PDF 1014 KB 17 May 2011 1929

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