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ETH Zurich uses 3D printing to create “first entirely soft artificial heart

Corey Clarke
ETH Zurich uses 3D printing to create “first entirely soft artificial heart”1
Researchers at ETH Zurich have created a silicone artificial heart using a 3D printer. According to the Swiss group, the silicone structure is “the first entirely soft artificial heart.” 
Developed at the Functional Materials Laboratory by doctoral student Nicholas Cohrs and Professor of Functional Materials Engineering Wendelin Stark. Having fabricated the heart,
the structure was evaluated with the help of the Product Development Group at ETH Zurich. This subsequent research was published in Artificial Organs.
Heart makers
The artificial heart was produced with a 3D printing, lost-wax casting technique which was similarly implemented to create this year’s Oscar awards. This means 3D printing was used to create the intricate molds of the silicone organ.
Cohrs explains the heart “is a silicone monoblock with complex inner structure” and weighs 390 grams with a volume of 679 cm3. In its evaluation, the team found the silicone materials could only last about 3,000 beats which amounts
to a lifespan of less than an hour. However Cohrs explains,This was simply a feasibility test. Our goal was not to present a heart ready for implantation, but to think about a new direction for the development of artificial hearts.

Despite this doctoral student Anastasios Petrou, part of the Product Development Group Zurich, believes the “system is probably one of the best in the world.”
The special testing area for the silicone heart. Photo via Zurich Heart.
Zurich Heart
The silicone artificial heart is part of the Medicine department’s Zurich Heart Project which brings together 20 research groups from Zurich and Berlin. The team explains the motivation for the project is to develop a better solution for artificial heart organs.
The researchers explain current heart pumps are not sufficient and lack the physiological factor of a pulse. Cohrs thereby states the “goal is to develop an artificial heart that is roughly the same size as the patient’s own one and which imitates the human
heart as closely as possible in form and function.”

There is definitely a need for artificial hearts, as ETH Zurich points out, there are 26 million people suffering from heart failure in the world and a prevalent lack of heart donors. Blood pumps are currently used as a substitute or as a stopgap while a patient waits for a donor heart or to recover from the heart problem. ETH Zurich’s researches hope with future research they can create a new device to provide a vital solution to heart problems.
3D printed hearts
3D printing has been explored in this field many times before as Georgia recently constructed a 3D printed heart valve to be used in surgery simulation. While elsewhere, an engineer turned to 3D printing to save his heart
A number of academic institutions are researching into 3D printed blood vessels such as Boston University’s development of a 3D printed vascular patch to promote blood vessel growth.
1Corey has a keen interest in 3D printing and all tech-related news, as well as the wider impact of additive manufacturing.
نشر هذا الخير العلمي في مجلة الوسيط في طب الاسنان العدد 3  2017 مع الترجمة العربية