Femoral Rotational Alignment
Femoral Rotational Alignment - Related Videos
10:45
Central Venous Catheter Insertion: Femoral Vein
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2023
Source: James W Bonz, MD, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA Central venous access is necessary in a multitude of clinical situations, including vascular access, vasopressor and caustic medication delivery, central venous pressure monitoring, volume resuscitation, total parental nutrition, hemodialysis, and frequent phlebotomy. There are three veins in the body that are accessed for central venous cannulation: the internal jugular, the subclavian, and the...
09:25
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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Cited by 4 •
2019
In this work we describe a technique that is used to create new crystals (van der Waals heterostructures) by stacking ultrathin layered 2D materials with precise control over position and relative orientation.
05:56
Mental Rotation
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual mental imagery refers to the ability to conjure images in one’s mind’s eye. This allows people to process visual material above and beyond the constraints of a current point-of-view; for example, a person could imagine, using their mind’s eye, how something might look in a different color, or what it would look like if it were made from a different material or rotated and seen from a different perspective. Mental imagery...
07:10
Femoral Bone Marrow Aspiration in Live Mice
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Cited by 18 •
2014
This protocol describes a procedure for serial sampling of femoral bone marrow (BM) without requiring the sacrifice of mice. This procedure facilitates longitudinal studies of the BM composition of mice over time and provides serial access to cells within the BM for ex vivo and transplantation studies.
07:48
Rotational Inertia
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2023
Source: Nicholas Timmons, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Inertia is the resistance of an object to being accelerated. In linear kinematics, this concept is directly related to the mass of an object. The more massive an object, the more force is required to accelerate that object. This is seen directly in Newton's second law, which states that force is equal to mass times acceleration. For rotation,...
FAQs
Anteversion and retroversion describe opposite deviations in the relationship between the femoral neck axis and the distal femoral condylar axis. Changing this relationship alters how the proximal and distal femur orient relative to one another. That rotational mismatch can therefore affect hip and knee mechanics, rather than representing an isolated anatomical measurement.
Rotational changes can alter the orientation of the hip and knee joints, which may affect the path of the patella during knee movement and the mechanics of the limb during walking. These effects explain why rotational alignment has functional importance beyond bone position alone and why abnormal anteversion or retroversion may be associated with altered gait.
Evaluation focuses particularly on the femoral neck axis and the distal femoral condylar axis. Their angular relationship provides a basis for identifying rotational orientation and recognizing possible torsional deformity. Physical examination can contribute clinical information, while imaging may be used when a more detailed assessment of the osseous relationship is needed.
Assessment combines physical examination with imaging when necessary. Examination provides a clinical evaluation of limb rotation and function, while imaging allows comparison of relevant femoral reference axes. Together, these approaches help determine whether abnormal anteversion or retroversion is present and support interpretation of its possible effects on joint orientation and gait.
Rotational alignment becomes important when surgery must restore or preserve the femur’s intended orientation. In corrective osteotomy, the assessment helps guide correction of a torsional deformity. During fracture fixation, it supports alignment decisions so that the repaired femur does not retain a rotational mismatch that could compromise hip or knee mechanics.
In hip or knee arthroplasty, accurate restoration of femoral rotational alignment helps reestablish appropriate joint orientation and limb biomechanics. Assessment of the relevant axes can guide surgical planning and alignment decisions. Restoring this relationship may improve mechanical function and reduce complications associated with persistent rotational malalignment.