Annuloplasty Ring
Annuloplasty Ring - Related Videos
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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Cited by 2 •
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We are developing a dynamic adaptive exposure technique using our scanning beam digital X-ray system. Rather than exposing an object uniformly, the exposure is adapted depending on the opacity of the object. Here we show an experiment on an anthropomorphic phantom that resulted in a dose saving of 30%.
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During pandemics, medical staff become a key resource in treating and managing patients with these infectious diseases. To achieve the best medical care, relevant techniques and procedures must be taught to medical staff which minimize the risk of work-related transmission of infection. When carrying out hemodynamic monitoring in cardiovascularly unstable patients, it is possible to utilize a Pulse Contour Cardiac Output (PiCCO) catheter. This system utilizes a thermodilution method to analyze...
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Source: Wang, L., et.al. Full-Endoscopic Isolation Zone Technique for the Treatment of Lumbar Disc Herniation. J. Vis. Exp.(2023)This video demonstrates a minimally invasive endoscopic procedure to treat lumbar disc herniation by removing the protruded nucleus pulposus and ruptured annulus fibrosus. The technique decompresses the affected nerve root, alleviates pain, and restores nerve function through targeted tissue resection and radiofrequency modulation.
07:39
Naïve Adult Stem Cells Isolation from Primary Human Fibroblast Cultures
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Cited by 5 •
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We report a method to isolate naïve multipotent skin-derived precursor (SKP) cells from primary human fibroblast cultures. We show that these SKPs derived from fibroblast cultures share similar stem cell properties to the ones derived directly from human skin biopsies. These cells express the neural crest marker, nestin, in addition to the multipotent markers such as OCT4 and Nanog.
06:56
COVID-19 / Coronavirus Outbreak: How to perform complete prone positioning in COVID-Patients
0 Views •
2020
In pandemic times, medical staff is becoming a key resource in fighting the infection. To achieve the best medical care, relevant techniques and procedures have to be taught to medical staff while reducing the risk of infection. COVID-19 patients often develop an acute respiratory distress syndrome with respiratory failure. Prone positioning is established as a core component of management in COVID-19 patients, to enable ventilation of a greater lung area and thereby improve gas exchange. This...
FAQs
Sizing determines how the prosthetic support relates to the valve’s fibrous opening. A properly selected ring reshapes the annulus while limiting excessive dilation, helping the leaflets meet more effectively during the cardiac cycle. This geometric correction is central to reducing backward flow without replacing the patient’s native valve.
Flexible, semi-rigid, and rigid designs differ in structure, yet each can limit excessive annular dilation. That structural distinction matters because the ring must stabilize the valve opening while supporting leaflet coaptation during the cardiac cycle. Comparing these designs therefore focuses on how structural restraint is provided during repair rather than on replacing the native valve.
Restoring valve geometry helps the leaflets align and meet more completely, a process called coaptation. Better coaptation reduces the gap through which blood can move backward during contraction. By combining annular stabilization with improved leaflet contact, the repair addresses both the shape of the valve opening and the regurgitant flow associated with poor closure.
Repair begins with sizing the ring to the valve annulus, followed by implantation around that fibrous opening. The implanted device then provides a stable framework while the surgeon preserves and repairs the patient’s native valve. This sequence links the physical placement of the prosthesis to the intended correction of annular shape and leaflet coaptation.
Annuloplasty rings are used primarily when mitral or tricuspid regurgitation requires reconstructive valve surgery. Their role is especially relevant when the native leaflets can be retained while the supporting annulus is reshaped and stabilized. The approach therefore supports valve repair rather than replacement, making the annulus an important target in managing backward blood flow.
Successful repair can reduce backward blood flow and improve cardiac function by restoring a more effective valve geometry. The ring also supplies a durable foundation for reconstructive surgery, so its contribution extends beyond the immediate reduction of annular dilation. In medical practice, these outcomes explain why annuloplasty is an important component of native-valve repair.