Correlation Between Intraoperative Tourniquet Use and Limb pH, Functional Measures and Patient-reported Outcomes After Ankle Fracture Surgery

PROCEDURE

Tourniquet

This arm will have a tourniquet placed about the thigh and inflated to 250mmHg for the duration of ankle fracture surgery or 2 hours, whichever is shorter.

Change from Baseline Patient-Reported Outcomes Measurement Information System Physical Function Subscale at 12 Weeks

Time frame: Collected preoperatively and 12 weeks postoperatively

Patient-Reported Outcomes Measurement Information System (PROMIS) Physical Function (PF) subscale, a Patient Reported Outcome survey used widely in orthopaedic literature, will be obtained and reported in points. For PROMIS measures, higher scores equals more of the concept being measured (e.g., more Fatigue, more Physical Function). A score of 50 is the mean of a relevant reference population and 10 is the standard deviation (SD) of that population. For example a score of 40 is one SD lower than the mean of the reference population where as a score of 60 is one SD higher than the mean of the reference population. Thus a score of 60 is one standard deviation above the average referenced population. This could be a desirable or undesirable outcome, depending upon the concept being measured.

Change from Baseline Patient-Reported Outcomes Measurement Information System Pain Interference Subscale at 12 weeks

Time frame: Collected preoperatively and 12 weeks postoperatively

Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Interference (PI) subscale, a Patient Reported Outcome survey used widely in orthopaedic literature, will be obtained and reported in points. A score of 50 is the mean of a relevant reference population and 10 is the standard deviation (SD) of that population. For example a score of 40 is one SD lower than the mean of the reference population where as a score of 60 is one SD higher than the mean of the reference population. Thus a score of 60 is one standard deviation above the average referenced population. This could be a desirable or undesirable outcome, depending upon the concept being measured.

Change from Baseline Foot and Ankle Ability Measure at 12 weeks

Time frame: Collected preoperatively and 12 weeks postoperatively

Foot and Ankle Ability Measure (FAAM), a Patient Reported Outcome survey used widely in orthopaedic Foot and Ankle literature, will be obtained and reported in points. Scores range from 0% (least function) to 100% (most function).

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