Quantcast
skip navigation
Home Orthopedics Neurology Columns What's Happening Media Contributors Store

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.