Academic literature on the topic 'Intraoperative electrophysiology'

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Journal articles on the topic "Intraoperative electrophysiology"

1

Fekete, Gábor, László Bognár, Emanuel Gutema, and László Novák. "Intraoperative electrophysiology in children – Single institute experience of 96 examinations." Neurology India 68, no. 2 (2020): 407. http://dx.doi.org/10.4103/0028-3886.284352.

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2

Augoustides, John, D. Joshua Mancini, and Francis Marchilinski. "An unusual cause of intraoperative confusion in the electrophysiology laboratory." Journal of Cardiothoracic and Vascular Anesthesia 16, no. 3 (2002): 351–53. http://dx.doi.org/10.1053/jcan.2002.124147.

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Hariharan, Praveen, Jeffery R. Balzer, Katherine Anetakis, Donald J. Crammond, and Parthasarathy D. Thirumala. "Electrophysiology of Olfactory and Optic Nerve in Outpatient and Intraoperative Settings." Journal of Clinical Neurophysiology 35, no. 1 (2018): 3–10. http://dx.doi.org/10.1097/wnp.0000000000000416.

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Hariharan, Praveen, Jeffery R. Balzer, Katherine Anetakis, Donald J. Crammond, and Parthasarathy D. Thirumala. "Electrophysiology of Olfactory and Optic Nerve in Outpatient and Intraoperative Settings." Journal of Clinical Neurophysiology 35, no. 4 (2018): 355–56. http://dx.doi.org/10.1097/wnp.0000000000000478.

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5

Sener, Ugur, Aman Dabir, and Christopher Cifarelli. "RADI-08. Elucidating the Electrophysiology of Intraoperative Radiotherapy – Experience from Two Cases." Neuro-Oncology Advances 3, Supplement_3 (2021): iii19. http://dx.doi.org/10.1093/noajnl/vdab071.078.

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Abstract Brain metastases require multimodality treatment, often combining surgical resection, radiation therapy, and individualized systemic pharmacotherapy based on oncogenic drivers. Intraoperative radiation therapy (IORT) is an emerging treatment option where radiation is delivered directly to the resection cavity at the time of surgery. We present two patients who underwent electrocorticography (ECoG) during IORT, providing information regarding electrophysiologic safety and tolerability of the technique. In the first case, a 65-year-old woman underwent resection of a hemorrhagic right occipital metastasis from non-small cell lung cancer. IORT was administered over sixteen minutes for a surface dose of 30 Gy. In the second case, a 73-year-old man with underwent resection of a right posterior frontal metastasis from non-small cell lung cancer. IORT was delivered over eleven minutes for a surface dose of 30 Gy. In both cases, a 1x6 contact array of subdural electrodes was placed adjacent to the planned field of radiation. Electrocortigraphy (HFF 70 Hz, TC 0.3 sec, sensitivity 150uV/mm) was obtained from the array two minutes prior to initiation of therapy, during therapy, and two minutes after completion of therapy in both cases. We found that IORT did not induce electrophysiological change in the tissue surrounding it in both cases with no epileptiform or ictal discharges during 20 minutes of ECoG recording around the time radiation therapy, nor did the patients have episodes suggestive of epileptic seizures in the acute post-operative period. One of the patients (case 1) experienced a single epileptic seizure 4 months after IORT, but this was temporally related to a new intraparenchymal hemorrhage and unlikely due to radiation therapy. These two cases illustrate the relative safety of IORT with respect to induction of immediate epileptiform changes within the brain parenchyma.
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De Vloo, Philippe, Terhi J. Huttunen, Dalila Forte, et al. "Intraoperative electrophysiology during single-level selective dorsal rhizotomy: technique, stimulation threshold, and response data in a series of 145 patients." Journal of Neurosurgery: Pediatrics 25, no. 6 (2020): 597–606. http://dx.doi.org/10.3171/2019.12.peds19372.

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OBJECTIVESelective dorsal rhizotomy (SDR) is effective at permanently reducing spasticity in children with spastic cerebral palsy. The value of intraoperative neurophysiological monitoring in this procedure remains controversial, and its robustness has been questioned. This study describes the authors’ institutional electrophysiological technique (based on the technique of Park et al.), intraoperative findings, robustness, value to the procedure, and occurrence of new motor or sphincter deficits.METHODSThe authors analyzed electrophysiological data of all children who underwent SDR at their center between September 2013 and February 2019. All patients underwent bilateral SDR through a single-level laminotomy at the conus and with transection of about 60% of the L2–S2 afferent rootlets (guided by intraoperative electrophysiology) and about 50% of L1 afferent roots (nonselectively).RESULTSOne hundred forty-five patients underwent SDR (64% male, mean age 6 years and 7 months, range 2 years and 9 months to 14 years and 10 months). Dorsal roots were distinguished from ventral roots anatomically and electrophysiologically, by assessing responses on free-running electromyography (EMG) and determining stimulation thresholds (≥ 0.2 mA in all dorsal rootlets). Root level was determined anatomically and electrophysiologically by assessing electromyographic response to stimulation. Median stimulation threshold was lower in sacral compared to lumbar roots (p < 0.001), and 16% higher on the first operated (right) side (p = 0.023), but unrelated to age, sex, or functional status. Similarly, responses to tetanic stimulation were consistent: 87% were graded 3+ or 4+, with similar distributions between sides. This was also unrelated to age, sex, and functional status. The L2–S2 rootlets were divided (median 60%, range 50%–67%), guided by response to tetanic stimulation at threshold amplitude. No new motor or sphincter deficits were observed, suggesting sparing of ventral roots and sphincteric innervation, respectively.CONCLUSIONSThis electrophysiological technique appears robust and reproducible, allowing reliable identification of afferent nerve roots, definition of root levels, and guidance for rootlet division. Only a direct comparative study will establish whether intraoperative electrophysiology during SDR minimizes risk of new motor or sphincter worsening and/or maximizes functional outcome.
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7

Chen, Jie, Lei Xu, and Dong Tian. "Intraoperative Electrophysiology Examination of Median Nerve Showed the Quick Outcome of Carpal Tunnel Release." HAND 11, no. 1_suppl (2016): 91S. http://dx.doi.org/10.1177/1558944716660555fs.

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8

Preul, Mark C., Richard Leblanc, Fernando Cendes, et al. "Function and organization in dysgenic cortex." Journal of Neurosurgery 87, no. 1 (1997): 113–21. http://dx.doi.org/10.3171/jns.1997.87.1.0113.

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✓ Cerebral dysgenesis is a subject of interest because of its relationship to cerebral development and dysfunction and to epilepsy. The authors present a detailed study of a 16-year-old boy who underwent surgery for a severe seizure disorder. This patient had dysgenesis of the right hemisphere, which was composed of a giant central frontoparietal nodular gray matter heterotopia with overlying large islands of cortical dysplasia around a displaced central fissure. Exceptional insight into the function, biochemistry, electrophysiology, and histological structure of this lesion was obtained from neurological studies that revealed complementary information: magnetic resonance (MR) imaging, [18]fluoro-2-deoxy-d-glucose positron emission tomography (PET), functional PET scanning, proton MR spectroscopic (1H-MRS) imaging, intraoperative cortical mapping and electrocorticography, in vitro electrophysiology, and immunocytochemistry. These studies demonstrated compensatory cortical reorganization and showed that large areas of heterotopia and cortical dysplasia in the central area may retain normal motor and sensory function despite strikingly altered cytoarchitectonic organization and neuronal metabolism. Such lesions necessitate appropriate functional imaging studies prior to surgery and cortical mapping to avoid creating neurological deficits. Integrated studies, such as PET, 1H-MRS imaging, cortical mapping, immunocytochemistry, and electrophysiology may provide information on the function of developmental disorders of cerebral organization.
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9

Makarin, Viktor, Anna Uspenskaya, Arseniy Semenov, et al. "INTRAOPERATIVE CONTINUOUS NEUROMONITORING OF LARYNGEAL RECCURENT NERVES IN PATIENTS WITH THYROID CANCER." Problems in oncology 65, no. 3 (2019): 342–48. http://dx.doi.org/10.37469/0507-3758-2019-65-3-342-348.

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Laryngeal muscles paresis ranks second in prevalence of postoperative complications after thyroid surgery. Intraoperative neuromonitoring (IONM) of recurrent laryngeal nerve (RLN) results in reduction of cases with dysphonia and prevents such severe complication as bilateral paresis. Currently there are two types of monitoring: intermittent and continual. When using intermittent IONM surgeon has no opportunity to control electrophysiology state of RLN during intervals between stimulations. In case of continual IONM date on amplitude and latency are available to surgeon in real time every second, allowing him instantly react to any disturbance of neural transmission to prevent its damage by changing surgical manipulation. This work presents the first experience of using continual neuromonitoring of RLN in Russia, the procedure is described in details its safety. It is represented the possibility of prevention of bilateral laryngeal muscles paresis.
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10

van Ouwerkerk, Willem J. R., Rob L. M. Strijers, Frederik Barkhof, Ulco Umans, and W. Peter Vandertop. "Detection of Root Avulsion in the Dominant C7 Obstetric Brachial Plexus Lesion: Experience with Three-dimensional Constructive Interference in Steady-state Magnetic Resonance Imaging and Electrophysiology." Neurosurgery 57, no. 5 (2005): 930–40. http://dx.doi.org/10.1227/01.neu.0000180813.10843.d4.

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Abstract OBJECTIVE: Preoperative, reliable detection by ancillary investigations of spinal nerve root avulsions in infants with severe obstetric brachial plexus lesions to avoid ineffective operative repair from deceivingly intact but actually avulsed nerve roots. METHODS: Ten infants were selected with an infrequent, severe dominant C7 lesion, primarily because of the anatomically distinct supraclavicular course of this spinal nerve. Three-dimensional constructive interference in steady-state magnetic resonance imaging (3D CISS MRI) studies under mild sedation were performed and evaluated for detection of avulsed nerve roots by two experienced neuroradiologists. Preoperative electrodiagnostics (electromyography and somatosensory evoked potentials) as well as intraoperative somatosensory potentials and muscle contractions after electrostimulation were recorded. Preoperative and intraoperative ancillary investigations were correlated with intraoperative findings in eight patients and clinical status in two children who recovered spontaneously. RESULTS: Despite two minor motion artifacts, the quality of the 3D CISS MRI studies was good. In 8 of 10 patients, prediction of root continuity was consistent with operative or clinical findings, and 2 remained doubtful. Preoperative and intraoperative electrodiagnostics tended not to correlate with intraoperative findings in this small, selected group. CONCLUSION: 3D CISS MRI provides good images of anterior and posterior spinal roots in infants with obstetric brachial plexus lesions. Images seem to allow accurate prediction of root avulsion in the majority of patients. In this study, electrodiagnostics were of limited value.
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