According to a biomedical engineering study published on the 23rd by the British magazine "Nature", the team of Chinese and American scientists reported a device that can collect the energy generated by the heartbeat without using a battery, and thereby power the pacemaker. This device can also correct sinus arrhythmia after being implanted in adult pigs.
As a more common implantable electronic device, a cardiac pacemaker emits an electrical pulse that is powered by a battery, and the conduction of the wire electrode stimulates the myocardial contacted by the electrode, thereby activating and contracting the heart for therapeutic purposes. However, current implantable medical devices such as pacemakers rely mainly on battery power. These batteries are not only cumbersome and hard, but also have a short life span. Implantable self-driven energy harvesters can be used for physiological regulation, but are currently only shown on small animal and cell models with lower energy requirements.
This time, Li Zhou of the Beijing Institute of Nano-Energy and Systems, Chinese Academy of Sciences, and Wang Zhonglin of the Georgia Institute of Technology and colleagues collaborated to develop an implantable generator that can collect enough energy from the heart beat to make commercial pacing. Power supply.
This energy harvester has good biocompatibility and mechanical durability, and is equipped with a power management unit and a pacemaker. The research team confirmed in pigs that their implantable system can not only perform cardiac pacing, but also correct sinus arrhythmia (an irregular heart rhythm) to prevent the disease from worsening - such as sinus arrest and ventricles Shake to avoid possible death.
Although this system needs to be further optimized for size, efficiency, and long-term biosafety to be ultimately used in the human body, the energy collected during each cardiac cycle has exceeded the energy required for human cardiac pacing.
Researchers believe that this technology has broad application prospects in the fields of tissue engineering, nerve regeneration and stem cell differentiation.
Source: China Science and Technology Network
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