The L300 is a functional electronic stimulator (FES). Each time I start to lift my left leg to walk, it sends a low-intensity electrical pulse down a nerve that runs from my knee to my ankle. That pulse forces my foot to flex upward from my ankle so that my toes don’t drag. The electrical pulse replaces the signal that my brain should be sending to the nerve that my MS has blocked, and it counters my foot drop.
About six months ago, L300 manufacturer Bioness received the OK from the U.S. Food and Drug Administration to market a new model of the L300, the L300 Go. A few days ago, I had an opportunity to “test-walk” the Go, and here’s what I found.
No foot sensor needed
The biggest and best difference is that the L300 Go doesn’t require you to use a foot sensor in the heel of your shoe. In the original L300, the sensor is used to detect your motion as you begin to walk. It sends a Bluetooth-like signal to the cuff on your leg, telling it that you’re trying to move. The cuff then generates the pulse that stimulates the nerve in your leg and helps you to lift your foot.
That means that anytime you change shoes, you need to move the sensor to the pair that you’re going to wear. Not only is that a nuisance, there can be a lack of consistency in where you place the sensor in the shoe. Also, because insoles are different, there can be the same inconsistency in the amount of heel pressure that’s required to trigger and to end the pulse.
Naturally, you can’t use the original L300 if you’re barefoot.
3-D motion detection
Without a foot sensor, the L300 Go’s cuff detects the start of your leg motion. This is similar to the process used by the WalkAide, a competitor of the L300. Unlike the WalkAide, the L300 Go has a 3-D-motion-detection system. Not only does it detect the forward and backward motion of your leg, it also detects sideways movement and leg rotation. This allows a physical therapist to adjust the unit more precisely to make it more responsive to each patient’s unique gait. To provide this three-way detection the Go contains four electrodes, compared with the original unit’s two.
No control unit
The original L300 requires you to carry a small control unit, which you use to turn the device on and off, put it into “test mode,” and also to adjust the intensity of its pulse. With the Go, this is all done on the side of the cuff. (If you really want a foot sensor or a control unit, Bioness will sell you one. But why would you want one?)
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