Bromage developed a simple scale based on physical findings to determine the extent of motor block associated with epidural anesthesia. The goal of certain types of anesthesia (such as obstetrical) is to completely block pain without motor block.
Parameters:
(1) ability to move legs freely
(2) ability to flex the knees
(3) ability to move the feet
Able to Move Legs
Able to Flex Knees
Able to Move Feet
Degree of Motor Block
Grade
Yes
Yes
Yes
nil
I
No or minimal
Limited
Yes
partial
II
No
No
Yes
almost complete
III
No
No
No
complete
IV
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