Investigation of fatigue failure of S-65-HL "Super Tygon" roller pump tubing.

A failure analysis was performed on Norton S-65-HL Tygon® tubing. Fatigue testing was performed on four sizes of this tubing, and essentially showed how the tubing wears out. A dynamic life hours to failure test, which was performed on the 3/8 internal diameter (ID) size, quantified when the tubing ruptured. Based on results of laboratory testing and the institution's clinical extracorporeal membrane oxygenation (ECMO) experience, a reasonable life expectancy for the 3/8 S-65-HL Tygon® size was determined for use in this institution's neonatal ECMO system. An understanding of the expected performance of roller pump tubing - an integral component of the ECMO system - is imperative to providing safe, effective extracorporeal life support.