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dc.contributor.authorChan, Chris Hoi Houng
dc.contributor.authorDiab, Sara
dc.contributor.authorMoody, Kayla
dc.contributor.authorFrazier, O Howard
dc.contributor.authorSampaio, Luiz C
dc.contributor.authorFraser, Charles D
dc.contributor.authorTeruya, Jun
dc.contributor.authorAdachi, Iki
dc.date.accessioned2019-12-03T01:57:19Z
dc.date.available2019-12-03T01:57:19Z
dc.date.issued2018
dc.identifier.issn0160-564Xen_US
dc.identifier.doi10.1111/aor.13165en_US
dc.identifier.urihttp://hdl.handle.net/10072/389465
dc.description.abstractDevelopment of pediatric ventricular assist devices (VADs) has significantly lagged behind that of adult devices. This frustrating reality is reflected by the fact that the Berlin Heart EXCOR VAD is currently the only approved pediatric-specific device in the USA. An alternative option is an off-label use of adult continuous-flow VADs, such as HeartMate II (HMII), which inevitably causes patient-device size mismatch in small children. We sought to conduct in vitro hemocompatibility testing in a pediatric flow condition, with a specific aim to provide benchmark values for future pediatric device development. Given the aforementioned fact that both pulsatile and continuous-flow devices are being used in the pediatric population, we opted to test both types of devices in the present study. The EXCOR and HMII blood pumps were tested using bovine blood under constant hemodynamic conditions (flow rate, Q = 2.5 ± 0.25L/min; differential pressure across the pump, ΔP = 68 ± 5mm Hg). Hemolysis was measured by Harboe assay. There was a steady increase in plasma free hemoglobin during in vitro testing, with a statistically significant difference between 5 and 360 min for both EXCOR (P < 0.0001) and HMII (P < 0.001). However, the degree of an increase in plasma free hemoglobin was more significant with HMII (P < 0.001). Normalized index of hemolysis for EXCOR and HMII were 0.003 ± 0.0026g/100 L and 0.085 ± 0.0119g/100 L, respectively. There was also a steady increase in platelet activation detected by CAPP2A antibody using flow cytometry, with a statistically significant difference between 5 and 360 min for both devices (P < 0.05). The degree of an increase in platelet activation was similar between the two devices (P = 0.218). High molecular weight von Willebrand factor (HMW vWF) multimer degradation measured by immunoblotting was evident for both devices, however, it was more pronounced with the EXCOR. EXCOR blood samples from all three time points (120, 240, and 360 min) were significantly different from the baseline (5 min), whereas only 360 min samples had a significant difference from the baseline with the HMII. In conclusion, we have observed similarities and differences in hemocompatibility profiles between the EXCOR and HMII, both of which are commonly used in the pediatric population. We anticipate the benchmark values in the present study will facilitate future pediatric VAD development.en_US
dc.languageEnglishen_US
dc.publisherWILEYen_US
dc.relation.ispartofpagefrom1028en_US
dc.relation.ispartofpageto1034en_US
dc.relation.ispartofissue11en_US
dc.relation.ispartofjournalArtificial Organsen_US
dc.relation.ispartofvolume42en_US
dc.subject.fieldofresearchBiomedical Engineeringen_US
dc.subject.fieldofresearchClinical Sciencesen_US
dc.subject.fieldofresearchcode0903en_US
dc.subject.fieldofresearchcode1103en_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsTechnologyen_US
dc.subject.keywordsLife Sciences & Biomedicineen_US
dc.subject.keywordsEngineering, Biomedicalen_US
dc.subject.keywordsTransplantationen_US
dc.titleIn Vitro Hemocompatibility Evaluation of Ventricular Assist Devices in Pediatric Flow Conditions: A Benchmark Studyen_US
dc.typeJournal articleen_US
dcterms.bibliographicCitationChan, CHH; Diab, S; Moody, K; Frazier, OH; Sampaio, LC; Fraser, CD; Teruya, J; Adachi, I, In Vitro Hemocompatibility Evaluation of Ventricular Assist Devices in Pediatric Flow Conditions: A Benchmark Study, Artificial Organs, 2018, 42 (11), pp. 1028-1034en_US
dcterms.dateAccepted2018-03-29
dc.date.updated2019-12-02T09:19:21Z
gro.hasfulltextNo Full Text
gro.griffith.authorChan, Hoi Houng


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