Posterior Sag Sign | PCL Tear Test
The Posterior Sag Sign is used to assess the integrity of the PCL or posterior cruciate ligament of the knee. How to Perform Posterior Sag Sign Position of Patient: The patient is positioned in supine with the hip at 45 degrees and knee at 90 degrees of flexion. The patient’s foot should be flat on the table and may be further stabilized by the examiner’s body. Performance: The examiner will observe the tibiofemoral joint line for any divot or sagging of the tibia. Further confirmation may be performed by holding the hip and knee at 90 degrees of flexion. While supporting the patient’s heel, observe for any drop or sag of the tibia. How to Interpret Posterior Sag Sign Positive Finding: A positive test occurs when the tibia excessively translates posteriorly beyond the neutral alignment with the femur. Test Accuracy / Reliability / Evidence: Posterior Sag Sign Sensitivity and Specificity Sensitivity = 0.79 Specificity = 1.0 +LR = 79 -LR = .21 Research Source: https://www.ncbi.nlm.nih.gov/pubmed/7... Rubinstein RA, Jr., Shelbourne KD, McCarroll JR, VanMeter CD, Rettig AC. "The accuracy of the clinical examination in the setting of posterior cruciate ligament injuries." The American Journal of Sports Medicine. Jul-Aug 1994; Gear I Use: 🎥 Canon 70D: https://amzn.to/2W6xjpu 💡 Neewer Lights: https://amzn.to/2Wvwiq2 🎤 Rode NTG4+: https://amzn.to/2W70qJh 🧰 Physical Therapy Tools I Use & Recommend: 🏋️♀️ ✅ MedBridge Education for CEUs: https://www.medbridgeeducation.com/pt... 💰 (Save $175 with Promo Code PTProgress) 💡Efficient Therapy Documentation Course ✏️ https://www.ptprogress.com/efficient 📝 Therapy Documentation Templates: https://www.ptprogress.com/templates 😲 It’s how I save 30-60 minutes a day on documentation ⏰ 📚 For PT Students 🎓 🙋🏽 PT School Interview Guide 🙋🏻♀️: https://www.ptprogress.com/PTSIG 😱Picmonic: https://www.ptprogress.com/picmonic 💻 MedBridge Student: https://www.ptprogress.com/medbridge-... (promo code PTPstudent) Interested in Becoming a PT? Get the Interview Guide: 📔NPTE Therapy Ed Guide: https://amzn.to/35DyWy3 **Disclaimer** The content found on this channel and any affiliated websites are not considered medical or financial advice. The information presented is for general education and entertainment purposes only. If you need medical attention, seek care from your physician or physical therapist. You agree to indemnify and hold harmless PTProgress, its employees, officers, and independent contractors for any and all injuries, losses, or damages resulting from any claims that arise from misuse of the content presented on this channel or associated websites. Some of the links above may be affiliate links, which help support the channel but does not cost you anything.
