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Orthopaedic surgeons at Spire Murrayfield Hospital can now use Mako’s robotic-arm to assist during total hip replacements and knee replacements. The robotic technology provides a personalised surgical plan for joint replacement surgery.
CT scans are used to create patient-specific, 3-D modelling for pre-surgical planning. In the operating room, your surgeon follows the personalised surgical plan while preparing the bone for the implant. The Mako robotic-arm guides your consultant within pre-defined areas which prevent them from moving outside planned areas, avoiding the removal of healthy bone tissue.
As surgeons use the robotic-arm to resurface the knee or hip joint for the placement of implants, the robotic-arm uses real-time, inter-operative feedback, enabling a high degree of precision and accuracy in placing implants. Research studies have shown that compared to traditional surgery, Mako can perform joint replacement with two to three times’ greater accuracy1
Based on preoperative CT scans, the Mako system generates a 3-D model of a patient's knee or hip joint.
This 3D model is used by the surgeons to determine how much bone to remove, and where to place the implants that replace diseased sections of these bones.
Without Mako, surgeons use a burr saw to remove bone. They work by eye and experience - instead of looking at the bone itself to determine whether enough has been removed. Mako tracks healthy and diseased bone with a LCD panel. Mako shows bone that needs to be removed as green; and areas of healthy tissue (which shouldn’t be removed) appear in red. This allows unparalleled accuracy within about two millimetres.
With Mako, the surgeon operates the robotic-arm that is equipped with a saw. The surgeon is free to remove bone until he reaches the boundaries prescribed during the planning stages. If the surgeon attempts to move outside these boundaries, the saw will turn off. This helps the surgeon minimise the trauma to the hip or knee and preserves the maximum amount of healthy tissue.
Unlike alternative robotic systems which clamp directly onto the bone, Mako is capable of tracking the position of the leg throughout surgery. This is achieved as it is not fixed relative to the bone but uses an infrared camera to track the position of the robotic-arm and the position of reflective bone screws placed in the bone. This is of crucial advantage to Mako patients as it leaves the surgeon free to move, adjust and test the musculoskeletal function of the hip or knee throughout surgery.
1 Accuracy of UKA Implant Positioning and Early Clinical Outcomes in a RCT Comparing Robotic Assisted and Manual Surgery. Blyth MJ; Jones B; MacLean A; Anthony I; Rowe P;
13th Annual CAOS Meeting, June 12-15, 2013, Orlando, FL, USA.
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