Posterior Sag Sign | Godfrey’s Test | Step-Off Test
The Posterior Sag Sign, also known under the names of Godfrey’s Test or Step-Off Test is a common orthopedic test to assess the integrity of the posterior cruciate ligament.
The prevalence of PCL injuries remains unknown, also due to the fact that a PCL tear often goes undiagnosed. The most common causes of PCL tears are due to dashboard traumas, a fall on the on the anterior proximal aspect of the tibia with a flexed knee, or hyperextension injuries. According to a study by Rubinstein et al. (1994), the Posterior Sag Sign has a sensitivity of 79% and a specificity of 100%. Although Rubinstein was the only study that evaluated the specificity of the posterior sag sign, it seems that this test has a good clinical value to confirm PCL tears.
In order to perform this test have your patient in supine lying position with the hip flexed to 45° and the knees flexed to 90°. While your patient is encouraged to completely relax his quadriceps, the affected knee is viewed from the side.
This test is positive for a torn PCL if the step between the tibia which usually extends 1cm anteriorly in relation to the femur is lost. For this reason, this test is also known as the step-off test.
This test can easily be progressed into Godfrey’s Sign, for which a posterior sag is noted in case of a torn PCL tear when the patient’s hips and knees are flexed to 90° and to the patient’s heels supported by the examiner. In this test, the posterior sag becomes more prominent due to gravity which pulls the tibia even more posteriorly.
21 OF THE MOST USEFUL ORTHOPAEDIC TESTS IN CLINICAL PRACTICE
What customers have to say about the Assessment E-Book
The Assessment E-Book This book helped me in my studying for my exam and in assessing my first patients. Awesome! Also for beginners!
The Assessment E-Book It’s an amazing Compilation! Congrats to all the work you have put in there. You’ll propably find all the test’s you’ve been looking for with propper explaination and source to doublecheck for you self. definetly a must have for every student, but it will also help an experienced practioner. Im looking forward to the lifelong updates on the topics.
Great work, guys
The Assessment E-Book A must-have for all physiotherapists, osteopaths and manual therapists. The authors conducted an extensive research on assessment tests in manual therapy. I find it very easy to read. The more I read the more I learn. Thank you!
The Assessment E-Book This book is great! It is very structured and detailed. It works extremely well on my Macbook and iPad.
The Assessment E-Book The best way to spend 80euros. Totally worth it. The amount of work you put behind this must have been absolutely huge. Every physical or physiotherapist should own it.
Congrats guys you’ve done an incredible job.
I’ve learnd a lot of new things and my approach to therapy in general have totally changed.
In one word: amazing. Keep going guys ! Best wishes from france.
This content is for members
Create your free account to gain access to this exclusive content and more!
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.