Release date: 2018-04-04
With the rise of 3D printing technology, in the field of health care, people are more aware of what kind of help and change this technology can bring to medical treatment, for example, printing body tissue for replacement, or through 3D printing. The organ guides the conduct of the medical treatment or is used to educate the patient. Many 3D printing technologies have begun to enter high-end hospitals for practical medical work.
At the Henry Ford Hospital in Detroit, doctors have begun experimenting with 3D printed organ models to guide heart valve surgery planning.
The valve appears to be less noticeable throughout the heart structure, but its role in the heart's never-ending blood circulation is critical: the valve is the equivalent of a guard, preventing blood from flowing back to the atrium or ventricle that has just left. The valve we usually refer to refers to the valve between the atria and the ventricle or between the ventricle and the artery. After the blood flows, the valve closes. When this "guard" has a problem, it will cause a heart function. The most common valve problem is mitral valve prolapse, and the valve between the left atrium and the left ventricle does not close properly.
In the Heart Structural Disease Center at Henry Ford Hospital, there are many 3D printed heart models on the lab display stand. The researchers said the models were printed according to CT scans of the patient's heart.
Both CT scanning and 3D printing are no longer very rare technologies, but the perfect integration of them requires the support of advanced science and technology and challenges remain. Dr. William O'Neill of the Henry Ford Hospital and his team developed and compiled the process with 3D printing company Materialise to obtain these tools that can help with the transcatheter mitral valve replacement (TMVR) surgery program. Located in Michigan, Materialise can convert CT scans of the heart into computer simulations and then acquire a heart model in 3D printing so that it can continue to be examined and manipulated, considering which valve needs to be implanted and where it is placed.
Researchers say that converting CT scans into text that can be 3D printed is still a complex process. To generate useful models, the company developed a suite of software to remove the large amount of noise generated in the scan and generate anatomical segments. The clinician can then do some manual computer work with the help of the Materialise expert to define the final model. These models can then be printed in the hospital and can be used to inspect and evaluate different valves. Once this is possible, the actual procedure becomes easier and more applicable to clinical practice.
The printed model is accurate to within one millimeter of the patient's actual heart. For cardiologists, it can be observed around the model which valve needs to be implanted and where it is deployed.
During an open mitral valve procedure, the surgeon actually inserts the valve's model into the anatomy to see if the valve is suitable, but this is not possible in minimally invasive surgery. High-quality 3D printing is a good way to present this process, providing a very valuable pre-report for practical valvular surgical planning, providing a higher quality solution for patient valve surgery in a minimally invasive manner.
Reference materials:
[1] 3D Printing Helps to Implant RiskyTranscatheter Mitral Valves
Source: Health New Vision
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