Fault Tree for Wheelchair Mounted Transfer Assist Device

1
Fault Tree for Wheelchair Mounted Transfer Assist
Device

• Mike Anderson
• Andrew Feola
• Jill Marion
• Bryan Shelly
• BioE1161
• April 18, 2006

2

• Patient Hazard

C
D
B
A
3
Power Hazards
A
Shock from wheelchair (power wheelchairs only)
Power failure of the system
Failure to automatically shut Off power
Power system malfunction
4
B
Mechanical Failures
Transfer Board Mechanics
Transfer Board Position
Wheels not locking In place properly
Failure due to cyclic stress
Failure due to ultimate stress
Transfer board not in a sturdy position
Transfer board doesnt lock in position
5
Patient Errors
C
C.1
Injury during transfer
Fall while performing transfer
Clothing getting stuck in the seat/hardware
Incorrect use of Transfer board
Improper transferring technique
6
Transfer board Incorrectly placed
C.1
Patient attempts to transfer a distance greater
than 18
Transfer board slides from underneath patient
7
Body Injury
D
Increased pressure on patients back/hip
Pressure Sores
Cushion seat wears down
Seat cushion left in an incorrect position