Current Section
Posterior Sag Test
Posterior Sag Test
|
Name
|
Purpose1
|
Description1
|
Sensitivity, Specificity
|
Validity, Reliability
|
Likelihood Ratio +/-
|
|
Posterior Sag Sign (Gravity Drawer Test)
|
Tests for rotary instability posteriorly and/or torn PCL
|
In supine subjects hip and knee are flexed to 90°while the examiner supports the leg under the lower calf or heel in the air. A positive sign is a posterior sag of the tibia caused by gravitational pull.
|
Sensitivity= 792-1003
Specificity=
1002
|
1. Cook CE, Hegedus EJ. Orthopedic physical examination tests: An evidence-based approach. Upper Saddle River, NJ: Pearson prentice Hall; 2008.
2. Rubinstein RA, Jr., Shelbourne KD, McCarroll JR, Van Meter CD, Rettig AC. The accuracy of the clinical examination in the setting of posterior cruciate ligament injuries. Am J Sports Med. 1994; 22:550-557.
3. Fowler PJ, Messieh SS. Isolated posterior cruciate ligament injuries in athletes. Am J Sports Med. 1987; 15: 553-557.
