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Characterization of an Innovative Implantable Valve-less Pump for Bio or Drug Fluid Delivery − Theory and Experiment

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Biomedical Engineering Aims and scope

This article describes the design and testing procedures for an innovative implantable pump for medical applications. In contrast to traditional drug delivery methods, this implantable pump delivers drugs or biofluids (blood, plasma, etc.) with better performance. The valve-less feature of the pump reduces the probability of damaged blood cells during pumping, which may be caused by shearing forces on the cell membrane. High accuracy of drug (or biofluid) administration in an implantable pump is beneficial when treating patients. In addition, the pump does not require an external power source since it relies entirely on the body’s own energy from the pulsating character of blood circulation. The theoretical model of the pump elements is built based on nozzle-diffuser elements. The experiment shows that the efficiency ratio decreases when there is an increase in diameter of the nozzle-diffuser element. The efficiency ratio is also affected by the angle and the length of the channel. The maximum flow rate for the designed pump is around 1 ml/min based on a frequency of 1.16 Hz in pulsatile flow regime. The total dimensions (nozzle-diffuser elements and pumping chambers) of our pump are 45 × 6 × 15 mm. However, it is important to note that the dimensions can vary (from micro to macro sizes) depending on the application.

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Authors and Affiliations

  1. School of Engineering Science, Simon Fraser University, Burnaby, Canada

    Ali Ostadfar & Andrew H. Rawicz

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  1. Ali Ostadfar
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  2. Andrew H. Rawicz
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Correspondence to Ali Ostadfar.

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Translated from Meditsinskaya Tekhnika, Vol. 47, No. 1, Jan.-Feb., 2013, pp. 42-46.

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Ostadfar, A., Rawicz, A.H. Characterization of an Innovative Implantable Valve-less Pump for Bio or Drug Fluid Delivery − Theory and Experiment. Biomed Eng 47, 50–55 (2013). https://doi.org/10.1007/s10527-013-9333-x

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  • DOI: https://doi.org/10.1007/s10527-013-9333-x

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