Tubing failure during prolonged roller pump use: a laboratory study

Autor:	Richard K. Firmin, Kim Wong, Hilliary M. Killer, Giles J. Peek, Colin Morrison
Rok vydání:	1999
Předmět:	medicine.medical_specialty Time Factors medicine.medical_treatment Peristaltic pump 030204 cardiovascular system & hematology Extracorporeal 03 medical and health sciences Extracorporeal Membrane Oxygenation 0302 clinical medicine Occlusion Pressure Extracorporeal membrane oxygenation Medicine Radiology Nuclear Medicine and imaging Advanced and Specialized Nursing business.industry General Medicine Compression (physics) Surgery Equipment Failure Analysis Perfusion Equipment and Supplies 030228 respiratory system Microscopy Electron Scanning Heart-Assist Devices Rheology Cardiology and Cardiovascular Medicine business Safety Research Biomedical engineering
Zdroj:	Perfusion. 14:443-452
ISSN:	1477-111X 0267-6591
DOI:	10.1177/026765919901400607
Popis:	Little is known about the mechanical forces acting on extracorporeal circuit tubing with prolonged roller pump use during extracorporeal membrane oxygenation (ECMO). We examined the time to tubing rupture of three different materials during actual roller pump use, mean and standard deviation (SD) (SD shown in parentheses): Tygon® (control) 243.7 h (175.4); LVA 121 h (14.3); and SRT 6.6 h (2.1). Failure times for both LVA and SRT were significantly different from the control (paired t-test, p = 0.02 and p < 0.001, respectively). The minimum failure times for Tygon and LVA were 99 and 101 h, respectively. We then examined Tygon under conditions of pure compression, demonstrating that even after 3.67 million compression cycles at full occlusion crack formation did not occur. If the tubing was over-occluded, cracks appeared within 24 h. Scanning electron microscopy of Tygon, which has been used during clinical ECMO, and the failure pattern during destruction testing demonstrate that shear stress and compression coexist during clinical ECMO. Use of under-occlusive pump settings could improve tubing life.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72b4198efac2b7eb5244f8c25ebdb584 https://doi.org/10.1177/026765919901400607 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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