hi,
First of all, for nonweightbearing usually axillary crutches are preffered. Generally, elbow crutches are used to provide lateral stability eg: Paraplegics. The usual pattern of progression is as follows.
a) First, 3-point nonweight bearing followed by
b) toe touch walking, then 3-point partial weightbearing, the amount of weight borne on affected limb varies.
c)4-point crutch walking
d) 2-point crutch walking
With regards,
Venkat