{"title":"A Report of Two Cases of Lip and Tongue Bite Injury Associated with Transcranial Motor Evoked Potentials","authors":"S. Davis, P. Kalarickal, T. Strickland","doi":"10.1080/1086508X.2010.11079785","DOIUrl":"https://doi.org/10.1080/1086508X.2010.11079785","url":null,"abstract":"ABSTRACT. Transcranial electric motor evoked potentials (TCeMEPs) are routinely used intraoperatively to detect and prevent iatrogenic injury to the spinal cord, specifically the corticospinal tract. Complications related to TCeMEP testing include the potential for seizure induction, cardiac arrhythmia, scalp burns, infection, and tongue or lip laceration. Among this list of potential complications, tongue and lip lacerations are the most common and most directly attributable to transcranial stimulation. The technique of low voltage stimulation and the correct placement of oral bite blocks is successful in preventing patient bite injuries. We report two cases of patient bite injuries following TCeMEPs and discuss potential mechanisms of injury and prevention.","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"39 1","pages":"313 - 320"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76695160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Faisal R Jahangiri, Jonathan H Sherman, Andrea Holmberg, Robert Louis, Jeff Elias, Francisco Vega-Bermudez
{"title":"Protecting the genitofemoral nerve during direct/extreme lateral interbody fusion (DLIF/XLIF) procedures.","authors":"Faisal R Jahangiri, Jonathan H Sherman, Andrea Holmberg, Robert Louis, Jeff Elias, Francisco Vega-Bermudez","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A 77-year-old male presented with a history of severe lower back pain for 10 years with radiculopathy, positive claudication type symptoms in his calf with walking, and severe \"burning\" in his legs bilaterally with walking. Magnetic resonance imaging (MRI) revealed lumbar stenosis at the L3-L4 and L4-L5 levels. During the direct or extreme lateral interbody fusion (DLIF/XLIF) procedure, bilateral posterior tibial, femoral, and ulnar nerve somatosensory evoked potentials (SSEPs) were recorded with good morphology of waveforms observed. Spontaneous electromyography (S-EMG) and triggered electromyography (T-EMG) were recorded from cremaster and ipsilateral leg muscles. A left lateral retroperitoneal transpsoas approach was used to access the anterior disc space for complete discectomy, distraction, and interbody fusion. T-EMG ranging from 0.05 to 55.0 mA with duration of 200 microsec was used for identification of the genitofemoral nerve using a monopolar stimulator during the approach. The genitofemoral nerve (L1-L2) was identified, and the guidewire was redirected away from the nerve. Post-operatively, the patient reported complete pain relief and displayed no complications from the procedure. Intraoperative SSEPs, S-EMG, and T-EMG were utilized effectively to guide the surgeon's approach in this DLIF thereby preventing any post-operative neurological deficits such as damage to the genitofemoral nerve that could lead to groin pain.</p>","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"50 4","pages":"321-35"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29666500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of anesthetic regimens and other confounding factors affecting the interpretation of motor evoked potentials during pediatric spine surgery.","authors":"Mark J Balvin, Kit M Song, Jefferson C Slimp","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Children undergoing corrective spine surgery are at risk of serious neurologic injury. Monitoring transcranial electric motor evoked potentials (TCeMEPs) during these procedures may identify and help prevent injury to motor pathways. The difficulty in obtaining consistent motor evoked potential (MEP) responses during pediatric spine surgery can result in part to the suppression of evoked responses caused by volatile inhalational anesthetics, elevated levels of propofol, and/or physiologic variables. Data obtained from 140 pediatric patients who underwent spine surgery with MEP monitoring were retrospectively analyzed and evaluated for age and anesthetic effects on stimulation variables. MEPs acquired under inhalational anesthetic agents required greater stimulation compared to intravenous propofol anesthesia. Additionally, the responses were more variable when inhalational agents were used. These effects were more prominent in younger age patients. The number of alerts of MEP loss or reduction related to anesthetic levels or blood pressure changes was higher under inhalational agents.</p>","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"50 3","pages":"219-44"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29365530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Potential neurological risk during a titanium rib procedure and appropriate intraoperative neurophysiologic monitoring modalities.","authors":"Megan T Roper","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The titanium rib procedure is a safe and effective way of surgically treating pediatric patients with thoracic insufficiency syndrome and scoliosis. As with any invasive surgical procedure, it is not without risks. This article explains the potential risks to neurological structures while outlining the surgical approach and the neurological anatomy in the vicinity of the implanted instrumentation. The types of potential nerve injury involve ischemia, trauma, compression, and stretch. Furthermore, a suitable compilation of modalities of intraoperative neurophysiologic monitoring is recommended to detect and avoid long-term nerve or spinal cord insult. Monitoring modalities that would be appropriate for this procedure are discussed.</p>","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"50 3","pages":"199-210"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29365528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ace: Aset Continuing Education: AJET Quiz September 2010 • Vol. 50, No. 3","authors":"","doi":"10.1080/1086508x.2010.11079779","DOIUrl":"https://doi.org/10.1080/1086508x.2010.11079779","url":null,"abstract":"Two ASET Continuing Education (ACE) credits will be awarded for reading AJET and answering the posttest questions with 80% accuracy. This is an open-book quiz. Answers must be entered online by September 30, 2013 to receive the ACE credits. In an effort to improve efficiency in scoring and updating ACE transcripts, all AJET quizzes are in an online format only. The online quiz is free for ASET members ($15.00 for non-members). To take the online quiz, got to www.aset.org, log in with your user name and password, and click on Shop at the top of the home page. Once inside the Online Store, click on the AJET Quizzes category and then \"Add to Cart\" AJET quizSeptember 2010 [Vol. 50, No.3].","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"1 1","pages":"250 - 252"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90290824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Brain Computer Interface (BCI) Tools Developed in a Clinical Environment","authors":"N. Anderson, Elise M DeVries","doi":"10.1080/1086508X.2010.11079773","DOIUrl":"https://doi.org/10.1080/1086508X.2010.11079773","url":null,"abstract":"ABSTRACT. Brain computer interfaces are devices that collect signals from a subject's cortical surface and interpret these signals to control a computer. Recently much development has been done on these devices with the help of epilepsy patients and the clinical staff who treat these patients. The types of data collected from epilepsy patients, particularly the invasive data give a unique opportunity to researchers in this area. The clinical staff has a unique opportunity to use the treatment of one patient population to help another.","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"42 1","pages":"187 - 198"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90588214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neurocysticercosis: fireflies in the central nervous system.","authors":"Viroj Wiwanitkit","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"50 3","pages":"245"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29365531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Anesthetic Regimens and Other Confounding Factors Affecting the Interpretation of Motor Evoked Potentials During Pediatric Spine Surgery","authors":"Mark J Balvin, Kit M. Song, J. Slimp","doi":"10.1080/1086508X.2010.11079776","DOIUrl":"https://doi.org/10.1080/1086508X.2010.11079776","url":null,"abstract":"ABSTRACT. Children undergoing corrective spine surgery are at risk of serious neurologic injury. Monitoring transcranial electric motor evoked potentials (TCeMEPs) during these procedures may identify and help prevent injury to motor pathways. The difficulty in obtaining consistent motor evoked potential (MEP) responses during pediatric spine surgery can result in part to the suppression of evoked responses caused by volatile inhalational anesthetics, elevated levels of propofol, and/or physiologic variables. Data obtained from 140 pediatric patients who underwent spine surgery with MEP monitoring were retrospectively analyzed and evaluated for age and anesthetic effects on stimulation variables. MEPs acquired under inhalational anesthetic agents required greater stimulation compared to intravenous propofol anesthesia. Additionally, the responses were more variable when inhalational agents were used. These effects were more prominent in younger age patients. The number of alerts of MEP loss or reduction related to anesthetic levels or blood pressure changes was higher under inhalational agents.","PeriodicalId":7480,"journal":{"name":"American Journal of Electroneurodiagnostic Technology","volume":"95 1","pages":"219 - 244"},"PeriodicalIF":0.0,"publicationDate":"2010-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86755895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}