Preliminary

A system enable the measurement of distance between markers in the field using only the camera in the light.

How often do you conduct surgery

4 days a week or more

2 to 3 times a week

weekly

Less than weekly

What is your experience as an orthopaedics surgeon

less than 3 year

3-10 years

10 to 20 years

More than 20 years

How often do you conduct hip replacement surgery ?

More than weekly

Weekly

Monthly

What is your main concern proceeding a hip replacement ?

Avoiding infection

Controlling leg lenght

Decreasing post operative pain

Reducing scar size

How important is the concern of ensuring same leg lenghts

Very important

important

not a major concern

not important at all

How do you ensure leg lenght control ?

Navigation system

Measurement with a ruler

Visual control with ruler

Test