727K views · 21K reactions | Putting positive prègnàncy sign on the test strip.  | AngieNation | Facebook

Clarke's Sign / Patellar Grind Test for Patellofemoral Pain The Clarke's Sign is a common test that is used in the diagnosis of patellofemoral pain syndrome (PFPS) as it is reasoned to stress the patellar cartilage. However, Cook et al. (2012) did a systematic review on various tests and clinical findings and found a variable sensitivity of 39-49% and a variable specificity of 67-95%. For this reason, Clarke's Sign does not seem to be able to add much value to the diagnosis of PFPS. | Physiotuto

34K views · 372 reactions | A North Carolina pug may be the first dog to test positive for #COVID19 in the United States. | Dr. Mehmet Oz | Facebook