Reed switches in Vagus Nerve Stimulators
The Vagus nerve in the neck is one of the primary communication lines to the brain. For patients with epilepsy problems, Vagus nerve stimulators or VNS for short, are implantable devices that help control seizures.
This is generally done as an out-patient procedure as the implant is small and can be embedded near the collar bone, under the skin. Vagus Nerve Stimulators control the stimulation of impulses to the brain, by delivering electrical impulses to the Vagus Nerve.
When a patient senses a seizure coming, a magnetic wand is used over the area where the VNS is implanted, to activate the reed switch inside, which triggers an extra, on-demand stimulation to the Vagus nerve, by controlling the frequency, current, duty cycle and pulse width.
Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.
The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.
R5 Ultra-Miniature SMD Reed Sensor
|Omni polar, normally open (NO), 9.5 mm SMD pitch. 5W switching capability at 0.35...Continue reading|
R4 Ultra-miniature SMD Reed Sensor
|Omni polar, normally open (NO), 12.5 mm SMD pitch. 10W switching capability at 0.5...Continue reading|