A wireless, battery-less pacemaker that can be implanted directly into a patient’s heart is being introduced by researchers from Rice University and their colleagues at the Texas Heart Institute (THI) at the IEEE’s International Microwave Symposium (IMS) in Honolulu June 4-9.
The pacemaker designed by the Rice lab of electrical and computer engineering professor Aydin Babakhani harvests energy wirelessly from radio frequency radiation transmitted by an external battery pack. In the prototype presented at IMS, the wireless power transmitter can be up to few centimeters away.
Pacemakers use electrical signals to prompt the heart to keep a steady beat, but they’ve traditionally not been implanted directly into a patient’s heart. Instead, they’re located away from the heart, where surgeons can periodically replace their onboard batteries with minor surgery; their electrical signals are transmitted to the heart via wires called “leads.”
Some of the common problems with this arrangement are complications related to the leads, including bleeding and infection. Babakhani said Rice’s prototype wireless pacemaker reduces these risks by doing away with leads.
He said other recently introduced lead-less pacemakers also mitigate some of these complications, but their form factors limit them to a single heart chamber and they are unable to provide dual-chamber or biventricular pacing. In contrast, battery-less, lead-less and wirelessly powered microchips can be implanted directly to pace multiple points inside or outside the heart, Babakhani said.
“This technology brings into sharp focus the remarkable possibility of achieving the ‘Triple Crown’ of treatment of both the most common and most lethal cardiac arrhythmias: external powering, wireless pacing and — far and away most importantly — cardiac defibrillation that is not only painless but is actually imperceptible to the patient,” said Dr. Mehdi Razavi, director of clinical arrhythmia research and innovation at THI and an associate professor at Baylor College of Medicine, who collaborated with Babakhani on development and testing of the new pacemaker.
The chip at the system’s heart is less than 4 millimeters wide and incorporates the receiving antenna, an AC-to-DC rectifier, a power management unit and a pacing activation signal. A capacitor and switch join the chip on a circuit board that is smaller than a dime. The chip receives power using microwaves microwaves in the 8 to 10 gigahertz electromagnetic frequency spectrum.
The frequency of the pacing signals produced by the pacemaker can be adjusted by increasing or decreasing power transmitted to the receiving antenna, which stores it until it reaches a predetermined threshold. At that point, it releases the electrical charge to the heart and begins to fill again.
The team successfully tested the device in a pig and demonstrated it could tune the animal’s heart rate from 100 to 172 beats per minute.
A short paper describing the device will be released at the conference. The paper’s authors are Babakhani and Yuxiang Sun of Rice; Brian Greet, David Burkland and Razavi of Baylor College of Medicine and THI; and Mathews John of THI.
Babakhani said the invention has prompted new collaborations among the Texas Medical Center institutions as well as the University of California at San Diego. The team is further developing its technology in collaboration with Farshad Raissi, a cardiac electrophysiologist and assistant professor of medicine at UCSD, Rice’s Behnaam Aazhang, the J.S. Abercrombie Professor of Electrical and Computer Engineering, and Rice’s Joseph Cavallaro, professor of electrical and computer engineering and of computer science.
Learn more: Texas team debuts battery-less pacemaker
The Latest on: Pacemaker
- Heartless Dilli? Pacemaker falling out, woman shunned by two hospitals on December 13, 2018 at 12:37 pm
NEW DELHI: Two hospitals in the city have refused to treat 62-year-old Roli Somvanshi, days after her pacemaker popped out. A resident of Saifai, Uttar Pradesh, Roli got the pacemaker last year in her ... […]
- Cardiac Pacemaker Industry to 2023: Market Anticipated to Reach 7.9% by Top 10 Global Key Players on December 13, 2018 at 8:46 am
The Global Cardiac Pacemaker Market is expecting a 7.9% CAGR during the forecast period (2017-2023) to claim substantial market valuation by the end of 2023, asserts Market Research Future (MRFR). Thi... […]
- Learn details of the Pacemaker Device market with segmentation by product types and application with forecast to 2025 on December 13, 2018 at 1:35 am
Global Pacemaker Device Market Research Report 2018 contains historic data that spans 2013 to 2017, and then continues to forecast to 2025. That makes this report so invaluable, resources, for the lea... […]
- Family hopes 'brain pacemaker' can stop child's seizures after all else failed on December 12, 2018 at 9:26 pm
TORONTO — Lori Dreher said doctors had tried “everything” to control her daughter Andi’s severe epilepsy — a laundry list of medications, a special diet and a couple of attempted ... […]
- Legendary jockey Lester Piggott recovering in hospital after fitting of pacemaker on December 12, 2018 at 11:56 am
The 83-year-old was admitted to hospital earlier this month with a heart problem The 83-year-old, one of the all-time greats in horse racing, was admitted to hospital in Cambridge earlier this month w... […]
via Google News and Bing News