분류 전체보기607 (Fig 2-C.09) Graft coronal Inclination angle https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 1️⃣ Graft Coronial Inclination Angle The graft coronal inclination angle is a critical measurement in the assessment of the anterior cruciate ligament (ACL). Identify the Medial Edge of the Femoral ACL Attachment Scroll to the Medial Edge of the Tibial ACL Attachment Determine the Angle: The angle formed between the marked medial edge of .. 2024. 3. 2. (Fig 2-C.07) Bi-dimensional sagittal inclination https://youtu.be/o5FY-l_g16s https://youtu.be/uDgqFi3itg0 Bi-dimensional Sagittal Inclination of the ACL 1️⃣ Definition and Importance The sagittal angle is crucial in understanding the anterior cruciate ligament (ACL) dynamics. It is defined as the angle between the anterior margin of the ACL and a line perpendicular to the long axis of the tibia. This measurement is best obtained from a midlin.. 2024. 3. 2. (Fig 2-C.06) Bernard and Hertel’s grid-based technique https://youtu.be/fVe5J_01GsA https://youtu.be/uDgqFi3itg0 Ideal Graft Femoral Tunnel Center 1️⃣ Traditional Method on Conventional X-ray ✅ Assessment in the Sagittal Plane: The position of the femoral tunnel can be evaluated in the sagittal plane by drawing two specific lines: Posterior Cortex Line: A line along the posterior cortex of the femur. Roof Line: Another line along the roof of the int.. 2024. 3. 2. (Fig 2-C.05) Remnant preservation ACL reconstruction https://youtu.be/tzyZ4YJi3bM https://youtu.be/uDgqFi3itg0 ACL Reconstruction with Remnant Preservation 1️⃣ Advantages Faster Healing: Accelerates graft revascularization and remodeling. Improved Sensation: Preserves proprioceptive fibers Better Healing Environment: Enhances the biological setting for recovery. Stable Anchor Point: Maintains natural attachment at the tibia, supporting knee stabil.. 2024. 3. 2. (Fig 2-C.04) Hamstring tendon (HT) autograft https://youtu.be/Eki3acwjyuw https://youtu.be/uDgqFi3itg0 Hamstring Tendon (HT) Grafts Overview: The distal semitendinosus and gracilis tendons are common choices for HT autografts. Grafts are anchored using various surgical devices such as interference screws, endobuttons, and staples. Healing Process: Healing of soft tissue grafts involves progressive mineralization of the fibrovascular interf.. 2024. 3. 2. (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -2 https://mskmri.tistory.com/800 (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -1 https://youtu.be/c3xVsxRqhjQ Bone-Patellar Tendon-Bone (BPTB) Autograft 1️⃣ Optimal Patient Age: Less than 35 years old Engaged in high-level pivoting sports with high physical demand 2️⃣ Advantages Bone-to-bone healing potentially leads to more ag mskmri.tistory.com https://youtu.be/ucPGY9r0cv8 https://you.. 2024. 3. 2. (Fig 2-C.02) Bone-patellar tendon-bone (BPTB) autograft -1 https://youtu.be/ucPGY9r0cv8 https://youtu.be/uDgqFi3itg0 Bone-Patellar Tendon-Bone (BPTB) Autograft 1️⃣ Optimal Patient Age: Less than 35 years old Engaged in high-level pivoting sports with high physical demand 2️⃣ Advantages Bone-to-bone healing potentially leads to more aggressive rehabilitation Low graft rupture rates comparable to quadruple hamstring tendon (QT) grafts High return to sport.. 2024. 3. 2. (Fig 2-C.01) ACL Repair https://youtu.be/J2AaFUMYp2g https://youtu.be/uDgqFi3itg0 ✅ ACL Repair Techniques 1️⃣ Primary ACL Repair Success Criteria: Primary repair is most effective when an avulsion occurs at the ACL's femoral or tibial attachment points. Bony Avulsion Treatment: Bony avulsion of the distal ACL can be treated successfully with direct bone-to-bone fixation. Mid-Substance Tears: Primary repairs for mid-sub.. 2024. 3. 1. (Fig 2-B.31) Ramp lesion versus no ramp lesion in ACL injury https://youtu.be/zefgdfakDLM https://youtu.be/8yHOp_whDZU 1️⃣ Meniscal Ramp Lesion Ramp lesions refer to injuries affecting the posterior horn of the medial meniscus in the setting of ACL tears. A high signal at the meniscocapsular junction without a frank fluid cleft indicates a sprain rather than a true separation. 2️⃣ False Positive Ramp Lesions Edema affecting the posterior capsule reflects .. 2024. 2. 29. (Fig 2-B.29) Segond fracture in ACL injury https://youtu.be/qMzfbQTmWmw https://youtu.be/8yHOp_whDZU ✅ Segond Fracture 1️⃣ Segond Fracture and Associated Injuries Associated Findings: Segond fractures are linked to ACL tears, MCL tears, medial meniscus tears, and posterolateral corner injuries. Indicator of ALRI: Recognized as a marker for anterolateral rotatory instability (ALRI) and a predictor of severe ligamentous injury, particularl.. 2024. 2. 29. (Fig 2-B.28) Avulsion fractures of the fibular head (arcuate sign) https://youtu.be/lyIcSFDWbc0 https://youtu.be/8yHOp_whDZU ✅Avulsion fractures of the fibular head (arcuate sign) Avulsion fractures of the fibular head, also known as the arcuate sign, are significant yet often not found in isolation. These fractures typically occur alongside high-grade injuries to the Posterolateral Corner (PLC) of the knee, commonly accompanied by tears in the cruciate ligamen.. 2024. 2. 26. (Fig 2-B.27) Scar tissue Attachment to the PCL https://youtu.be/cQ1YiSFDZ2I https://youtu.be/8yHOp_whDZU ✅ ACL Scarring: The scar tissue from the ACL most frequently attaches to the lateral side of the proximal PCL and the intercondylar notch. It is less common for the scar to attach back to the ACL's original attachment point. Among these patterns, scarring that reconnects the ACL to its original attachment point is rare but results in the .. 2024. 2. 25. (Fig 2-B.26) Scar tissue Attachment to the Anatomical origin of the ACL https://youtu.be/_dsyOjpKQ70 https://youtu.be/8yHOp_whDZU ★ Patterns of ACL Scarring: End-to-End Scarring: The torn ends of the ACL heal by connecting each other. Scarring to the PCL: The ACL forms scar tissue that attaches to the posterior cruciate ligament (PCL). Scarring to the Roof of the Intercondylar Notch: The ACL scar tissue attaches to the upper area of the intercondylar notch Scarring .. 2024. 2. 25. (Fig 2-B.25) Chronic ACL tears (non-visualization) https://youtu.be/0bFMpdbDbT0 https://youtu.be/8yHOp_whDZU ★ Chronic ACL tears Laxity and abnormal horizontal orientation of fibers are the most useful features for detecting ACL disruption in the chronic setting as opposed to fiber discontinuity and bone contusions, which are the most useful features in the acute setting. Nonvisualization of the ACL has also been described as a finding of chroni.. 2024. 2. 25. (Fig 2-B.24) Chronic ACL tear https://youtu.be/tBMO-n-5DZE https://youtu.be/8yHOp_whDZU ✅ Chronic ACL tears Laxity and abnormal horizontal orientation of fibers are the most useful features for detecting ACL disruption in the chronic setting as opposed to fiber discontinuity and bone contusions, which are the most useful features in the acute setting. Chronically torn ACL is often seen with the horizontal axis or may display.. 2024. 2. 25. (Fig 2-B.23) Subacute ACL tear https://youtu.be/hRrgWgyjkkk https://youtu.be/8yHOp_whDZU ✔️Subacute ACL tears typically have the following characteristics: Improved visibility of the torn ligament fibers as the initial bleeding subsides. The distal part of the ACL may become more horizontal. Clearer definition of fluid within the rupture site. Persistent bone bruising with a possible reduction in signal intensity or extent. P.. 2024. 2. 25. (Fig 2-B.22) Posterolateral bundle tear (Gap sign) -2 https://youtu.be/Mwug3dW_6so https://youtu.be/8yHOp_whDZU ✅Imaging Signs of Isolated Posterolateral Bundle Tear of the ACL An ACL tear may only involve one bundle. The specific imaging signs of an isolated posterolateral bundle tear include: 1️⃣Gap Sign Description: Presence of fluid signal and/or a gap. Location: Between the medial aspect of the lateral femoral condyle and the lateral aspect of.. 2024. 2. 24. (Fig 2-B.21) Posterolateral bundle tear (Gap sign) -1 https://youtu.be/KyybCz-ryFw https://youtu.be/8yHOp_whDZU ✅Imaging Signs of Isolated Posterolateral Bundle Tear of the ACL An ACL tear may only involve one bundle. The specific imaging signs of an isolated posterolateral bundle tear include: 1️⃣Gap Sign Description: Presence of fluid signal and/or a gap. Location: Between the medial aspect of the lateral femoral condyle and the lateral aspect of.. 2024. 2. 24. (Fig 2-B.20) Common pattern of the ACL Partial Tear https://youtu.be/uusDC9pFfiw https://youtu.be/8yHOp_whDZU 1️⃣Partial ACL tears The ACL consists of two primary bundles: the anteromedial bundle (AMB) and the posterolateral bundle (PLB). These bundles have different susceptibilities to injury based on the position and movement of the knee at the time of injury. Anteromedial Bundle (AMB) Injuries: The AMB is more prone to injury when the knee is .. 2024. 2. 24. (Fig 2-B.19) Low-grade Partial tears of the ACL https://youtu.be/4xDpKuZkMSI https://youtu.be/8yHOp_whDZU ✅Understanding ACL Partial Tears 1. Partial ACL Tears: Partial ACL tears account for 15% of all ACL injuries, presenting a diagnostic challenge. MR imaging accuracy rates for detecting partial tears range from 25% to 53%. The difficulty is distinguishing between partial and complete tears and accurately defining bundle involvement. 2. Ris.. 2024. 2. 23. (Fig 2-B.18) Meyers and McKeever classification system type IV https://youtu.be/uJBTc4Fl7ys https://youtu.be/8yHOp_whDZU ✅Intercondylar tibial eminence fracture. Intercondylar tibial eminence fractures stand out as a prevalent type of knee injury among children, most commonly observed between the ages of 8 and 14. These fractures exhibit a range of presentations, from nondisplaced to displaced and from comminuted to non-comminuted forms. Adults, in particul.. 2024. 2. 23. 이전 1 ··· 10 11 12 13 14 15 16 ··· 29 다음
