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E Stennert - One of the best experts on this subject based on the ideXlab platform.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Background Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Study design Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Results Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. Conclusion The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
O Guntinas-lichius - One of the best experts on this subject based on the ideXlab platform.
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Prognostic value of Electroneurography and electromyography in facial palsy.
The Laryngoscope, 2008Co-Authors: Maria Grosheva, Claus Wittekindt, O Guntinas-lichiusAbstract:Objectives: To compare the prognostic value of Electroneurography (ENG) and needle electromyography (EMG) to estimate facial function outcome after acute facial palsy. Study Design: Retrospective study using electrodiagnostic data and medical chart review. Methods: Two hundred one patients treated 1995 to 2004 were included. Initial and final facial function was established clinically by the House-Brackmann (HB) scale. ENG results were classified into amplitude loss less than 75% and amplitude loss 75% or greater to predict complete recovery and defective healing, respectively. Initial and follow-up EMG results were classified into neurapraxia and predicted complete recovery. In contrast, axonotmesis/neurotmesis and mixed lesions predicted, by definition, defective healing. Results: Initial HB was II to IV in 154 patients and V to VI in 47 patients. The etiology was idiopathic palsy in 139, iatrogenic lesion in 29, traumatic in 18, and herpes zoster in 15 patients. Finally, 134 (67%) patients showed a full recovery. Sixty-seven (33%) patients showed signs of defective healing. ENG presented a sensitivity, specificity, accuracy, positive predictive value (to predict defective healing), and negative predictive value of 60%, 79%, 73%, 59%, and 80%, respectively. The values for the initial EMG were 66%, 98%, 89%, 91%, and 89%. The best results showed the follow-up EMG with 85%, 100%, 97%, 100%, and 96%. EMG results were not classifiable in 32 (16%) patients. Conclusions: EMG showed higher prognostic values than ENG, especially when repeated during the time course of the facial palsy. ENG might be helpful if the EMG result is not classifiable.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Background Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Study design Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Results Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. Conclusion The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
C Sittel - One of the best experts on this subject based on the ideXlab platform.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Background Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Study design Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Results Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. Conclusion The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
Y S Park - One of the best experts on this subject based on the ideXlab platform.
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prognostic value of Electroneurography in bell s palsy and ramsay hunt s syndrome
Clinical Otolaryngology, 2006Co-Authors: Sayong Chae, Y S ParkAbstract:Objectives: This study evaluated the accuracy of Electroneurography to predict the prognosis of Bell's palsy and Ramsay–Hunt's syndrome. Design: A retrospective, institutional review board-approved study. Setting: A secondary referral and a university-based centre. Participants: The patients had been treated for a sudden onset unilateral facial paralysis over the past 10 years (1994–2004). This retrospective study included only those patients who had been followed up for at least 3 months or if they had reached a complete recovery before then. Main outcomes measures: House–Backmann grade versus Electroneurography value. Results: The recovery rates to House–Brackmann grade II or better were 95% in those with Bell's palsy and 84% in those with herpes zoster oticus. The Electroneurography value of the recovery and non-recovery groups from those with either Bell's palsy or herpes zoster oticus was similar. The logistic regression model between the Electroneurography values and the probability of recovery showed no correlation in those with Bell's palsy or with herpes zoster oticus. This study did not identify the proper Electroneurography value that had enough appropriate sensitivity and specificity to predict the prognosis of paralysis accurately in Bell's palsy or in herpes zoster oticus patients. Conclusion: Electroneurography performed between day 7 and 10 for Bell's palsy or day 10 and 14 for herpes zoster oticus does not provide accurate information on the prognosis or recovery rate of the facial paralysis.
M Streppel - One of the best experts on this subject based on the ideXlab platform.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.
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Variability of repeated facial nerve Electroneurography in healthy subjects.
The Laryngoscope, 1998Co-Authors: C Sittel, O Guntinas-lichius, M Streppel, E StennertAbstract:Background Facial Electroneurography is an objective measurement of a muscle compound action potential. The amplitude ratio between the paretic and the normal side is used as a basis for estimating the prognosis of facial palsy. According to Esslen, the difference of amplitudes in healthy subjects is only 3%. Twenty healthy test persons were investigated with the aim of 1. reproducing the published data on the left-right difference in normal test subjects and 2. determining whether the amplitude ratio is constant over time after repeated measurements. Study design Bilateral Electroneurography was conducted on 20 healthy volunteers (age range, 23-36 y; 12 men, eight women). Two investigators performed four measurements at 1-week intervals on every subject. Results Mean amplitude ratio was 32.5%. Repeated measurements on the same individual differed considerably-- from 0% to 80%. The 99% confidence interval computed from the data ranged from 26% to 39% amplitude ratio. Conclusion The symmetry of facial evoked compound potentials postulated by Esslen and Fisch is not supported by these data. As have other investigators, the authors found significant left-right differences in healthy subjects. Furthermore, they showed for the first time that the amplitude ratio is not constant in every individual at repeated measurements. In light of these data, prognosis of facial palsy based on electroneurographic data alone seems doubtful.