Hi valariedl,
So, basically I have a VNS which doesn't work anymore (in stopping seizures at least. It works) Ironically, it was put in when when I was young and just developing as a young woman so the doctors put in as you would a man. You think they read the charts. Needless to say, it is slipping towards my armpit cause I don't have pecs. Besides that: I have been on almost med possible, with Oxycarbazipine being the most recent.
I'm not saying that your VNS doesn't work I'm just saying that the settings might need changed or it may need a new battery.
When I first got my VSN it was put on very low settings. I've had my VNS on several different settings through the years so these are just examples, I don't know if these were ones that I had actually been on.
When I had my VNS put in the first setting might have been staying on for 10 seconds then going off for 3 minutes, then coming back on for 10 seconds and going back off for 3 minutes. The settings were then increased to something like staying on for 15 seconds and going off for 2 minutes then coming back on for 15 seconds then going off for 2 minutes.
At times my neuro may have only had to change the timing of the VNS. It may have stayed on for 15 seconds but gone off for 1 minute then back on for 15 seconds then off for 1 minutes. Sometimes he would only change the length it was on like staying on for 20 seconds then going off for 1 minute then staying on for 20 seconds then going off for 1 minute.
I believe right now my VNS is set to stay on for 20 seconds then go off for 30 seconds then come back on for 20 seconds then off for 30 seconds.
Getting to figure out the settings of the VNS is sort of like finding out what the right dosage of med you should be taking and it takes some time to do it. Taking 100mg of a med isn't going to work for everyone. Some may need a higher dosage and some may need a lesser dosage. Through the years the dosage of your med may even need to be increased, the first dosage you were taking may not be strong enough anymore. This is the same with the VNS.
I've been on several different meds through the years. I am still taking meds along with the VSN and it took some time to figure out which ones and dosages worked best with it. I am still having the dosages of my meds changed at times, either increased or decreased.
The battery life in a VNS is just the same as a regular battery, it's not going to last forever. The more often it is used then the faster the battery is going to die. Your VNS is coming on regularly on it's own, not just when you use the magnet, all day long and it might be on for 2 hours total or it could be on for 5 or more hours depending on the settings. If you use a flashlight for 2 hours a day then the battery is going to last longer than if you were to use the flashlight over 5 hours a day.
When your VNS was put in your body may not have been fully developed which is why you are having problems as to where it is moving in your chest. I know that the muscle in my chest was cut into when my VNS was put in and my left breast, which is the side the VNS is on, hangs lower than my right breast.