Table 3.

Karlstrom criteria for functional assessment after management of floating knee injuries

CRITERION	EXCELLENT	GOOD	ACCEPTABLE	POOR
Subjective symptoms from thigh or leg	none	Intermittent slight symptoms	More severe symptom impairing function	Considerable functional impairment: pain at rest
Subjective symptoms from knee or ankle joint	none	Same as above	Same as above	Same as above
Walking ability	Unimpaired	Same as above	Walking distance restricted	Uses cane, crutch or other support
Work and sports	Same as before the accident	Given up some sport; work same as before accident	Change to less strenuous work	Permanent disability
Angulation, rotational deformity or both	0	<10 degrees	10 – 20 degrees	> 20 degrees
Shortening	0	< 1 centimetre	1 – 3 centimetres	> 3 centimetres
Restricted joint mobility	0	<10 degrees at ankle; <20 degrees at hip, knee or both	10 – 20 degrees at ankle; 20 – 40 at hip, knee or both	>20 degrees at ankle; >40 degrees at hip, knee or both