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    Breaking News

    3D Printing Helps Surgeons Sharpen Their Craft

    3D printed simulations of lifelike body parts allow surgeons in training the opportunity to practice complex surgeries.

    3D Printing Helps Surgeons Sharpen Their Craft
    3D printed simulations of lifelike body parts help surgeons in training improve practical experience. (Credit: Michigan Medicine)
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    Michigan Medicine - University of Michigan04.12.17
    Cher Zhao recently had the rare opportunity to practice skills belonging to the most advanced surgeons: reconstructive cartilage grafting.
     
    The setting, however, was fitting for the University of Michigan Medical School resident. 
     
    Scalpel in hand, Zhao sat at a table carving precise measurements out of realistic material designed to mimic the texture of human cartilage. 
     
    In the real world, these shapes would be cut from a patient’s rib for grafts used for airway or ear reconstruction. In these procedures, then, it’s vital that the pieces are carved exactly right.
     
    The tool providing Zhao and her peers this immersive experience: Three-dimensional models based on real human cases.
     
    Surgical training is one more way University of Michigan researchers are using 3D printing to advance the quality of care. And the lifelike printed replicas are providing a cost-efficient tool to improve practical experience for more trainees such as Zhao, U-M researchers said in an article published in Otolaryngology-Head and Neck Surgery.
     
    Historically, a surgeon’s skills have been acquired in live patients, anaesthetized animals or human cadavers, but authors say surgical simulation is increasingly recognized as a vital educational tool.
     
    “3D printing is bringing a whole new meaning to hands-on experience for surgeons in training,” said David Zopf, M.D., the article’s senior author and a pediatric head and neck surgeon at C.S Mott Children’s Hospital.
     
    “Hands-on experience is critical for acquiring and improving surgical skills, especially of new and complex procedures,” adds Zopf, who keeps a laser 3D printer in his own office. “This is an exciting tool that not only offers trainees exposure to opportunities they otherwise wouldn’t have but that also allows them to demonstrate proficiency of skills before being performed on children.”
     

    Lifelike 3D printed replicas like these improve practical experience for more surgeons in training. (Credit: Michigan Medicine)
    Endless Potential
    Mott teams have used 3D printing for almost six years, with the ability to now produce models at a low cost and a much faster rate. The models are based on computer designs of CT scans.
     
    The ways in which the technology can be applied are many.
     
    Groundbreaking 3D printed splints made at U-M have helped save the lives of babies with severe tracheobronchomalacia, which causes the windpipe to periodically collapse and prevents normal breathing. Mott has also used 3D printing on fetuses to plan for potentially complicated births. 
     
    It also has been applied to complex cases involving surgically removing tumors—including the full replica of a young patient’s skull to plan a best course of action.
     
    Such breakthroughs are particularly valuable in pediatric surgery when there are few alternative options for hands-on training.
     
    “Airway reconstruction for specialized cases is a technically demanding procedure that often involves carving cartilage to support and expand a reconstructed trachea,” said Zopf, who has helped develop high fidelity models for ear reconstruction, cleft lip, and mandible surgery.
     
    “Currently, a surgeon in training has scarce opportunity to carve cartilage graft for this type of procedure. We want to see if 3D printing can accelerate and enhance surgical training.”
     
    Practice Makes Perfect
    Eighteen surgical trainees in a U-M otolaryngology head and neck surgery dissection course, including Zhao, participated in the exercise last year. They practiced carving on a 3D printed model of a harvested human cartilage graft created through a CT scan of a pediatric patient’s rib. The mold was filled with cornstarch and silicone to give it the real feeling and texture of cartilage. 
     
    Most participants said the exercise was a very relevant training tool and that the replicas also were useful in demonstrating their skills to teachers.
     
    Zhao said the experience may bolster medical training, especially for doctors-to-be like herself who plan to specialize in pediatric otolaryngology treating children with airway disorders. 
     
    “You only get one chance to carve a harvested graft from a patient’s rib, so you have to do it perfectly the first time,” she said. “It takes years of practice to learn the technical skills to do it. This was a very realistic experience and what’s great is you can keep printing dozens of these models at a time so you can practice over and over again.”
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