Microfluidic Emulation of Mechanical Circulatory Support Device Shear-Mediated Platelet Activation.
Thrombosis of ventricular assist devices (VADs) compromises their performance, with associated risks of systemic embolization, stroke, pump stop and possible death. Anti-thrombotic (AT) drugs, utilized to limit thrombosis, are largely dosed empirically, with limited testing of their efficacy. Furthe...
| Published in: | Biomedical Microdevices Vol. 17; no. 6; pp. 1 - 25 |
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| Main Authors: | , , , , , , , |
| Format: | Journal Article |
| Published: |
Springer Nature
Dec2015
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=127516683&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 127516683 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 13872176 ODN jtl: Biomedical Microdevices issn: 13872176 maglogo: N pubinfo: dt: Dec2015 vid: 17 iid: 6 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 127516683 10.1007/s10544-015-0015-1 127516683 ppf: 1 ppct: 24 formats: fmt: @attributes: type: P tig: atl: Microfluidic Emulation of Mechanical Circulatory Support Device Shear-Mediated Platelet Activation. aug: au: Dimasi, A. Rasponi, M. Sheriff, J. Chiu, W.-C. Bluestein, D. Tran, P. L. Slepian, M. J. Redaelli, A. affil: Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milano, 20133, Italy. sug: ab: Thrombosis of ventricular assist devices (VADs) compromises their performance, with associated risks of systemic embolization, stroke, pump stop and possible death. Anti-thrombotic (AT) drugs, utilized to limit thrombosis, are largely dosed empirically, with limited testing of their efficacy. Further, such testing, if performed, typically examines efficacy under static conditions, which is not reflective of actual shear-mediated flow. Here we adopted our previously developed Device Thrombogenicity Emulation methodology to design microfluidic platforms able to emulate representative shear stress profiles of mechanical circulatory support (MCS) devices. Our long-term goal is to utilize these systems for point-of-care (POC) personalized testing of AT efficacy under specific, individual shear profiles. First, we designed different types of microfluidic channels able to replicate sample shear stress patterns observed in MCS devices. Second, we explored the flexibility of microfluidic technology in generating dynamic shear stress profiles by modulating the geometrical features of the channels. Finally, we designed microfluidic channel systems able to emulate the shear stress profiles of two commercial VADs. From CFD analyses, the VAD-emulating microfluidic systems were able to replicate the main characteristics of the shear stress waveforms of the macroscale VADs (i.e. shear stress peaks and duration). Our results establish the basis for development of a lab-on-chip POC system able to perform device-specific and patient-specific platelet activation state assays. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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