Navigation Links
Study: Mechanomyography to be accurate in detecting nerves during minimally invasive spine surgery
Date:3/15/2010

An electronic device is an accurate technique for locating and avoiding nerves during spinal procedures, suggests a study by Henry Ford Hospital researchers.

The issue becomes important for patients as the demand for minimally invasive surgical techniques continues to grow, so does the need for effective methods for monitoring the location of nerves during surgery to avoid damage to them.

Mechanomyography (MMG) systems function by measuring the mechanical response of muscle following nerve stimulation, compared to traditional techniques that monitor the electrical response of muscle using electromyography (EMG). EMG systems are widely used as intraoperative tools to help surgeons avoid nerve injury. MMG has been widely used in laboratory settings to study things such as muscle fatigue, however up until now it has not been applied as an intraoperative tool for locating nerves.

"We felt there was a safer and faster way to intra-operatively monitor the location of nerves and we wanted to test this theory by directly comparing MMG to EMG," says Stephen Bartol, MD, orthopedic spine surgeon at Henry Ford Hospital. "We found MMG to be extremely effective for detecting the presence of nerves during minimally invasive surgical procedures when the nerves could not be directly visualized."

Dr. Bartol presented results from the study this week at the Tenth Annual Scientific Conference of the Canadian Spine Society in Alberta.

According to the National Institutes of Health, in a three-month period, about one-fourth of U.S. adults experience at least one day of back pain. It is one of the most common medical issues affecting Americans.

During minimally invasive spine surgery, a common treatment for chronic back pain, a small electrical signal is sometimes used to stimulate nerves and detect responses so that nerves are not damaged during surgery.

"Because conventional EMG systems monitor for subtle changes in muscle electrical activity, there is the potential for electrical interference. By using an MMG system, we are not worried about electrical interference since the response to electrical stimulation is measured through mechanical sensors instead," says Dr. Bartol.

In an animal model, Dr. Bartol and his colleagues measured the EMG and MMG responses to electrical current.

"We found that the MMG system had a faster response, indicating a higher sensitivity for detection of nerves at a lower threshold," says Dr. Bartol.

In another study, also presented at the conference, Dr. Bartol took a look at how the muscle response to electrical stimulus varies with the distance of the nerve from the source of the stimulus.

"We need to know exactly how far away we are from the nerve. Working with different levels of current, we were able to establish a relationship between the current and distance, allowing the surgeon to determine precisely how far a nerve is from the stimulus probe," says Dr. Bartol.

They found MMG detected the presence of a nerve on average 1.2 seconds earlier than EMG, using approximately half the amount of stimulating current. Since electrical resistance is highly variable, depending on the conducting tissue, EMG monitoring systems may utilize currents as high as 200 mA. The MMG system in this study has a maximum current output of 6 mA, nearly 35 times less than comparable EMG systems.

"We found mechanomyography to be a more sensitive indicator for locating nerves," says Dr. Bartol. "We can, without looking, know within a millimeter or two where we are in relation to the nerve. By utilizing a system that requires less electrical current, we may be able to further decrease the risk of injury to our patients."

Dr. Bartol explains that further investigation is needed in human trials.


'/>"/>

Contact: Maria Seyrig
mseyrig1@hfhs.org
313-874-4039
Henry Ford Health System
Source:Eurekalert

Related medicine news :

1. Study: Kidney disease a big risk for younger, low-income minorities
2. Study: Federal funds support health depts., but leadership is key
3. Henry Ford Hospital study: Shoulder function not fully restored after surgery
4. New Study: Improved Immune System with Gene-Eden, a Natural Antiviral Supplement that Targets Chronic Viruses
5. UNC study: Obese 3-year-olds show early warning signs for future heart disease
6. Study: Choice between stroke-prevention procedures influenced by patient age
7. Study: Many physicians not using established criteria
8. New Study: Innovative Technique Allows Male Cancer Survivors Who are Sterile from Treatment to Father Children
9. McGill-CHUM study: 56 percent of young adults in a new sexual relationship infected with HPV
10. IU study: Half of urban teen girls acquire STIs within 2 years of first sexual activity
11. New Study: Life Science Jobs Total 77,000 in Washington State
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... York, NY (PRWEB) , ... October 13, 2017 , ... ... influential people in business to advocate for action towards gender equality at their inaugural ... views from around the globe, and reached a social audience of over 3 million. ...
(Date:10/13/2017)... , ... October 13, 2017 , ... “The Journey: From ... every danger possible to save lost souls in the Philippines. “The Journey: From the ... is a dedicated teacher of the Bible. She has taught all ages and currently ...
(Date:10/12/2017)... ... 2017 , ... The company has developed a suite of ... authorities worldwide. From Children’s to Adults 50+, every formula has been developed by ... , These products are also: Gluten Free, Non-GMO, Vegan, Soy Free, Non-Dairy*, Preservative ...
(Date:10/12/2017)... ... October 12, 2017 , ... Dr. Parsa Mohebi, the Los ... article to the newly revamped Cosmetic Town journal section, featuring articles ... procedure known as Follicular Unit Extraction (FUE). , Dr. Mohebi says ...
(Date:10/12/2017)... ... October 12, 2017 , ... Health Literacy Innovations ... literacy software tool, and the Cancer Patient Education Network (CPEN), an independent professional ... announce a new strategic alliance. , As CPEN’s strategic partner, HLI will ...
Breaking Medicine News(10 mins):
(Date:10/5/2017)... , Oct. 5, 2017  In response to ... Oral and Maxillofacial Surgeons (AAOMS) released prescribing recommendations ... to be used as a first-line therapy to ... Recognizing the value ... White Paper "Opioid Prescribing: Acute and Postoperative Pain ...
(Date:10/2/2017)... 2017  Eli Lilly and Company (NYSE: ... third quarter of 2017 on Tuesday, October 24, 2017. ... day with the investment community and media to further ... call will begin at 9 a.m. Eastern time. Investors, ... webcast of the conference call through a link that ...
(Date:9/28/2017)... Sept. 28, 2017 Cohen Veterans Bioscience and ... use of wearable and home sensors for real-time monitoring ... Signal Foundation, a nonprofit organization focused on disruptive health ... an affordable analytical system to record and integrate behavioral, ... ...
Breaking Medicine Technology: