In the Journals

Vibroacoustic patterns from knee can help diagnose certain patellofemoral conditions

Specific vibroacoustic emanations from the knee joint may be linked to certain patellofemoral conditions, according to recently published data.

Investigators analyzed 32 healthy controls and 73 patients with one of three patellofemoral joint conditions. Symptomatic patients were diagnosed with either lateral patellar compression syndrome (LPCS), osteoarthritis (OA) or chondromalacia (22, 30, and 21 patients, respectively). All patients underwent knee flexion and extension testing to evaluate vibroacoustic emanations from motion of the knee joint via an acceleration sensor. Primary metrics studied were variation of mean square (VMS), difference between mean of both four maximum and minimum values (R4), power spectral density for frequency of 50 Hz to 250 Hz (P1) and 250 Hz to 450 Hz (P2).

Patients with disorders of the knee were found to have vibroacoustic emanations of significantly higher parameters than healthy controls, according to the researchers. Additionally, significant vibroacoustic differences were seen between each type of patellofemoral joint disorder evaluated.

Although patients in the chondromalacia and OA cohorts exhibited differences across all metrics, patients with OA showed differences in VMS, P1 and P2 values compared with patients with LPCS.

Significant differences were also seen in R4 values between patients with chondromalacia and LPCS, according to the researchers. – by Christian Ingram

Disclosures: The authors report no relevant financial disclosures.

Specific vibroacoustic emanations from the knee joint may be linked to certain patellofemoral conditions, according to recently published data.

Investigators analyzed 32 healthy controls and 73 patients with one of three patellofemoral joint conditions. Symptomatic patients were diagnosed with either lateral patellar compression syndrome (LPCS), osteoarthritis (OA) or chondromalacia (22, 30, and 21 patients, respectively). All patients underwent knee flexion and extension testing to evaluate vibroacoustic emanations from motion of the knee joint via an acceleration sensor. Primary metrics studied were variation of mean square (VMS), difference between mean of both four maximum and minimum values (R4), power spectral density for frequency of 50 Hz to 250 Hz (P1) and 250 Hz to 450 Hz (P2).

Patients with disorders of the knee were found to have vibroacoustic emanations of significantly higher parameters than healthy controls, according to the researchers. Additionally, significant vibroacoustic differences were seen between each type of patellofemoral joint disorder evaluated.

Although patients in the chondromalacia and OA cohorts exhibited differences across all metrics, patients with OA showed differences in VMS, P1 and P2 values compared with patients with LPCS.

Significant differences were also seen in R4 values between patients with chondromalacia and LPCS, according to the researchers. – by Christian Ingram

Disclosures: The authors report no relevant financial disclosures.