| Objective: To evaluate the parameters of center of pressure (COP) in patients with CAI by using a dynamic detection device developed by the School of Electronic Information and Electrical Engineering of Shanghai JiaoTong University. Methods: We recruited 28 healthy subjects as control group and 24 patients with CAI as treatment group including 13 patients with mechanical instability (MAI) and 11 patients with functional instability (FAI).The plantar pressure was dynamically detected, and the COP sway length, anterior/posterior(A/P) sway length, medial/lateral(M/L) sway length,A/P sway range and M/L sway range were measured.Results:When standing on both feet, the total length of COP sway, the sway of A/P and M/L in the treatment group were longer, and the sway range of A/P and M/L was significantly larger than those in the control group (all P<0.05 ). When standing on one foot, the COP parameters of the affected side foot and unaffected side foot were significantly larger than those of the control group (all P<0.05) except A/P sway length of unaffected leg, and the M/L sway range of the affected side foot in the treatment group was significantly larger than that of the unaffected side foot (all P<0.05). We observed differences between MAI and FAI patients regarding COP sway length, M/L sway length, A/P sway length and L/L sway range(all P<0.05), but there was no significant difference in A/P shaking range.Conclusion: It indicates that for CAI patients, the change of COP parameter in M/L direction is more sensitive. The device would be helpful for the personalized rehabilitation program and follow up procedure, and increasing patients’ interestingness and compliance. |
