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First evaluation of a novel tri-compartment unloader

This biomechanical study outlines the unique design and function of the Levitation knee brace and demonstrates that Levitation can reduce patellofemoral and tibiofemoral joint contact forces to a level that would be achieved by losing 45 lbs of body weight.

Second biomechanical study of a tri-compartment unloader

By using a biomechanical model of the knee, this study demonstrated a tri-compartment unloader brace (TCU) can reduce a number of contact and ligament forces across the knee during a deep knee bend. The results replicate and extend the findings of Budarick et al. 2020, which demonstrated that a TCU can reduce knee joint loading.

Third biomechanical study of a novel tri-compartment unloader knee brace

This study examined the biomechanical effects of a tri-compartment unloader brace (TCU) in patients with multi-compartment knee OA while they performed actions of daily living. Results showed that Levitation can significantly reduce quadriceps muscle effort and internal knee extension moments.

Research Summary

Retrospective pilot survey of a novel TRI-COMPARTMENT UNLOADER

Preliminary evaluation of a new orthotic for multi-compartment knee osteoarthritis: a retrospective pilot survey

Budarick, A.R., Bishop, E.L., and Cowper-Smith, C.D. (2020). Journal of Prosthetics and Orthotics. Under Peer Review.

Key Findings

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REDUCED PAIN

95% of participants with knee OA experienced a reduction in pain with the Levitation knee brace.

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Increased physical activity

70% of participants with knee OA indicated increased physical activity. On average, physical activity increased by 8 hours per week.

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simplified treatment plan

60% of participants reported a decrease in their use of at least one other treatment for their knee OA.

This study of Levitation knee brace efficacy in users with knee osteoarthritis (OA) demonstrated significant clinical benefits of the brace related to pain, function, mobility, quality of life, and use of medication and other treatments. A survey was completed in a group of 40 adults who exhibited varied patterns of activity-related knee pain characteristic of patellofemoral, tibiofemoral, or multi-compartment knee OA.

Participants used the Levitation brace for at least 1 month and reported on outcomes including pain, function, physical activity, quality of life, and use of medications and other treatments before and after brace use. Validated outcome measures including the visual analog scale (VAS) and the Lower Extremity Functional Scale (LEFS) were used to assess pain and physical function (primary outcome measures) respectively. Exploratory measures were used to quantify physical activity levels and use of medication and other treatments (secondary outcome measures).

Figure 1

The improvement in pain scores with Levitation for all OA types exceeded the externally validated “PASS” threshold (orange line) 1
– Tubach et al. 2005. Ann Rheum Dis. 64(1)
; that is, the pain score below which patients typically consider themselves well.

Clinical study on Levitation 2 Knee brace at mccaig institute

Figure 2

A statistically significant improvement in functional scores was above the minimum clinically relevant threshold of 9 points on the LEFS scale for all OA symptom groups.

Figure 3

Participants ranked the effectiveness of Levitation versus other knee braces they had personally used. Participants consistently ranked Levitation as more effective.

Clinical study on Levitation 2 Knee brace at mccaig institute

Partner Institutions

University of Calgary

Spring Loaded is currently collaborating with researchers at the University of Calgary to understand how the use of the Levitation knee brace influences user-reported outcomes such as pain, knee function, quality of life, physical activity levels and use of medication and other treatments. U of C researchers are also quantifying the potential of Levitation to unload the patellofemoral and tibiofemoral knee compartments.

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Third biomechanical study of a novel tri-compartment unloader knee brace
Third biomechanical study of a novel tri-compartment unloader knee brace

Third biomechanical study of a novel tri-compartment unloader knee brace

This study examined the biomechanical effects of a tri-compartment unloader brace (TCU) in patients with multi-compartment knee OA while they performed actions of daily living. Results showed that Levitation can significantly reduce quadriceps muscle effort and internal knee extension moments.

View Details

Second biomechanical study of a tri-compartment unloader
Second biomechanical study of a tri-compartment unloader

Second biomechanical study of a tri-compartment unloader

By using a biomechanical model of the knee, this study demonstrated a tri-compartment unloader brace (TCU) can reduce a number of contact and ligament forces across the knee during a deep knee bend. The results replicate and extend the findings of Budarick et al. 2020, which demonstrated that a TCU can reduce knee joint loading.

View Details