At least 2.6 million people in the UK have narrowing of the arteries around the heart, which can lead to a heart attack, angina, or both, while The American Heart Association estimates that over 16 million Americans suffer from coronary artery disease, described as the number one killer of men and women in the U.S.. Build-up of fatty material in the arteries can cause them to narrow, in a condition known as atherosclerosis. Medical professionals say that an increased risk of suffering the condition is caused by ageing, high cholesterol and blood pressure, smoking, and as an inherited susceptibility.
A healthy lifestyle is recommended to minimise the onset of atherosclerosis. However, for more severe cases, which can lead to the narrowing or blockage of arteries, restricting blood flow to various organs and tissues, the patient may have to undergo an atherectomy procedure. In this medical procedure, a thin tube is inserted into the affected artery through an incision in the skin. The tube features a grinder at its tip, and through a combination of centrifugal force and sanding, the fatty material, known as arterial calcium or plaque, is removed or modified within the artery. This procedure can also be combined with the insertion of a stent, that opens up and supports the artery, either to biodegrade over time, or remain within the patient.
To fit the existing motor’s form factor and functionality requirements, the Portescap design team engaged with the medical device OEM. High motor speed was crucial for grinding optimisation, so the Portescap engineers specified a two-pole design in a brushless DC (BLDC) format. Along with the improved control offered by electronic commutation, the friction-free operation of the brushless motor enabled it to achieve a greater speed. With this in mind, the Portescap engineering team specified the Ultra EC TM16ECS brushless DC motor design, able to meet the high-speed target at the required torque. The Ultra ECTM design also increased torque density and helped deliver the smooth control crucial to the precise requirements of the arterial procedure.
Given the compact size required for a hand-held device, the motor’s heat efficiency was an additional factor to consider. The OEM specified a low motor operating temperature as surgeons need to hold the devices during the procedure. The frictionless operation of a slotless BLDC motor is enhanced by the Ultra ECTM16ECS’ low iron losses at high speed, achieved thanks to the motor’s proprietary U coil technology. This efficient design allowed Portescap to meet the requirements of high speed while ensuring low operating temperature even within a compact package.
Image 1: Build-up of fatty material in the arteries can cause them to narrow or block, in a condition known as atherosclerosis (Source : AdobeStock_79614760)
Image 2: Atherectomy device
Image 3: Portescap’s Brushless Slotless Ultra 16ECS36 motor
Portescap offers the broadest miniature and specialty motor products in the industry, encompassing coreless brush DC, brushless DC, stepper can stack, gearheads, digital linear actuators, and disc magnet technologies. Portescap products have been serving diverse motion control needs in wide spectrum of medical and industrial applications, lifescience, instrumentation, automation, aerospace and commercial applications, for more than 70 years.
Portescap has manufacturing centers in the United States and India, and utilizes a global product development network with research and development centers in the United States, China, India and Switzerland.
For more information, visit www.portescap.com
Tel: +44 (0)1905 917477
Address: Progress House, Midland Road, Worcester, Worcestershire, WR5 1AQ, United KingdomReader Contact: Portescap: Nicole Monaco
Tel: +1 404.877.2534