Myoguide Clinical Video
Myoguide Stimulation Location in Hand Case 1
Multi-focal sites, such as the hand, can require the use of stimulation to identify the correct injection sites. EMG itself cannot separate the different fingers, as they all emit EMG signals. Stimulation will invoke a twitch response and identify the finger. The video demonstrates the value of Myoguide in finding the injection site, as indicated by the twitch response. Once more, you will also notice the ease of use. Stimulation location is essential in these areas. The site is located by palpation during finger movement. Once the hypodermic needle electrode is in, the patient is asked to move the finger in question. The site is reinforced as EMG is evoked when the movement is initiated. Stimulation through the needle will confirm the injection site is related to that finger by evoking a muscle contraction. Stimulation parameter can be changed easily with several pulse widths, frequency of pulse presentation, and constant current level. This particular patient encounter required 4mA at 500uS pulse duration, presented at 1 pulse per second. Stimulation evokes movement of the finger, as a twitch response, and is achieved at a very comfortable stimulation current, and was presented continuously in order to simplify the clinicians work. You can see the bright yellow panel light illuminates when actively stimulating.
Videos are for demonstration purposes ONLY
Benefits
• Myoguide provides a superior injection site targeting system with many useful features, such as, the ability to see and hear EMG signals, display real time analyzed EMG, and stimulation location capability.• Myoguide provides both quantitative and qualitative feedback necessary for clinicians to make decisions about treatment and treatment delivery. All these features are wrapped up in a small , battery operated, hand-held device.
• Myoguide helps identify involved muscles through pre-injection, or pre-intervention evaluation. This can be done by either EMG evaluation, or stimulation location, and is particularly useful in cases where the site may be surrounded by essential nerves and blood vessels
• Pre-injection evaluation can lead to use of reduced drug dose and volume, thereby contributing to limiting drug diffusion into adjacent areas. This is especially pertinent in cases where drugs will be re-injected on follow up appointments, as the basal EMG activity level can be assessed before a dose decision is finalized.
Improve Efficacy
The need to increase accuracy when injecting neuromodulators has been highlighted by recent FDA reviews of the dangers of peripheral effects. Use of Myoguide can lead to more accurate injection site targeting, allowing reduced concentrations and volumes of injected drugs.