1. Device mechanical malfunction Decreased oxygen delivery
Rev: April 20, 2008
FAULT TREE ANALYSIS
Retractable Tubing Device
JMAN: Jamie Haney, Nathan Sendgikoski, Michael Smithula, Andrew Vidokle
Device dropped OR
Damage due to spring torque
Housing assembly cracks or breaks
Spring malfunctions
DEVICE
FAILURE
Retraction mechanism fails
Device mechanical malfunction OR
Spring dislodges from attachement OR
Inconsistent retraction due to improper spring
Locking mechanism fails OR
Tubing becomes kinked within housing assembly
Coiled conformation of tubing impedes oxygen delivery OR
Tubing is wound too tightly
Decreased oxygen delivery OR
Oxygen leakage from attachment sites due to improper materials