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Home » News

3D Bioprinted Heart Provides New Tool For Surgeons

News By AM Chronicle EditorNovember 20, 20203 Mins Read
3D Bioprinted Heart Caregie Mellon University
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3D bioprinted heart has been created by Adam Feinberg and his team. This one being the first full-size 3D bioprinted human heart model uses their Freeform Reversible Embedding of Suspended Hydrogels (FRESH) technique. The model, created from MRI data using a specially built 3D printer, realistically mimics the elasticity of cardiac tissue and sutures. This milestone represents the culmination of two years of research, holding both immediate promise for surgeons and clinicians, as well as long term implications for the future of bioengineered organ research.

The FRESH technique of 3D bioprinting was invented in Feinberg’s lab to fill an unfilled demand for 3D printed soft polymers, which lack the rigidity to stand unsupported as in a normal print. FRESH 3D printing uses a needle to inject bioink into a bath of soft hydrogel, which supports the object as it prints. Once finished, a simple application of heat causes the hydrogel to melt away, leaving only the 3D bioprinted object.

While Feinberg, a professor of biomedical engineering and materials science and engineering has proven both the versatility and the fidelity of the FRESH technique, the major obstacle to achieving this milestone was printing a human heart at full scale. This necessitated the building of a new 3D printer custom made to hold a gel support bath large enough to print at the desired size, as well as minor software changes to maintain the speed and fidelity of the print.

Major hospitals often have facilities for 3D printing models of a patient’s body to help surgeons educate patients and plan for the actual procedure; however, these tissues and organs can only be modeled in hard plastic or rubber. Feinberg’s team’s heart is made from a soft, natural polymer called alginate, giving it properties similar to real cardiac tissue. For surgeons, this enables the creation of models that can cut, suture, and be manipulated in ways similar to a real heart. Feinberg’s immediate goal is to begin working with surgeons and clinicians to fine tune their technique and ensure it’s ready for the hospital setting.

“We can now build a model that not only allows for visual planning, but allows for physical practice,” says Feinberg. “The surgeon can manipulate it and have it actually respond like real tissue, so that when they get into the operating site they’ve got an additional layer of realistic practice in that setting.”

This paper represents another important marker on the long path to bioengineering a functional human organ. Soft, biocompatible scaffolds like that created by Feinberg’s group may one day provide the structure onto which cells adhere and form an organ system, placing biomedicine one step closer to the ability to repair or replace full human organs.

“While major hurdles still exist in bioprinting a full-sized functional human heart, we are proud to help establish its foundational groundwork using the FRESH platform while showing immediate applications for realistic surgical simulation,” added Eman Mirdamadi, lead author on the publication.

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AM Chronicle Editor
3d bioprinting 3D printed heart 3d printing Adam Feinberg additive manufacturing Carnegie Mellon University Medical
AM Chronicle Editor

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