Occupationally related ultrasonic findings in carpet and floor layers' knees.

Soft-tissue changes in the anterior aspect of the knees were evaluated with ultrasonography among 96 randomly selected carpet and floor layers and 72 painters. The ultrasonography showed thickening of the prepatellar or superficial infrapatellar bursa in 49% of the carpet and floor layers and 7% of the house painters. Fluid collection in the prepatellar or superficial infrapatellar bursa was noted for 10 carpet and floor layers, and this ultrasonographic finding was associated with knee pain in kneeling postures.