Clarke’s Sign | Patellar Grind Test | Patellofemoral Pain Assessment
Clarke’s Sign aka the patella grind test aims to identify pathological changes in retropatellar cartilage by exerting a compressive force on the patella.
Cook et al. (2012) reviewed the literature on evidence regarding the test’s diagnostic ability to detect patellofemoral disorders in patients with pain identified near the anterior aspect of the knee and found positive likelihood ratios between 0.9 to 7.4 and negative likelihood ratios between .7 to 1.1. None of the studies demonstrated high methodological quality, which is why only a weak clinical value can be attributed to the test.
To conduct the test, the patient is lying supine with the knees extended. Position yourself next to the patient on the involved side and place the web space of the thumb on the superior border of the patella. Then ask your patient to contract the quadriceps as if they were to extend the knee while you apply downward and inferior pressure on the patella.
Pain with movement of the patella or the inability to complete the test is indicative of patellofemoral dysfunction and is considered a positive test.
21 OF THE MOST USEFUL ORTHOPAEDIC TESTS IN CLINICAL PRACTICE
Other common orthopedic tests to assess for patellofemoral pain syndrome are:
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.