Sphincter Electromyography

Blaivas, Jerry G.

doi:10.1002/nau.1930020403

Cited by 33 publications

(8 citation statements)

References 41 publications

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“…The use of selective needle electrodes is preferable to surface electrodes for the diagnosis of sphincter dyssynergia 20. Blaivas21 recommends the use of needle electrodes when there are doubts about a possible neurogenic aetiology of the dyssynergia, but since all our patients in the case group had suprasacral spinal cord injury, we considered that the use of surface electrodes was acceptable for the diagnosis of periurethral sphincter dyssynergia.…”

Section: Discussionmentioning

confidence: 99%

Usefulness of dynamic urethral resistance relation (DURR) measurement for differential diagnosis between static and dynamic urinary obstruction in male spinal cord injury patients

Chamorro

Salinas

López

et al. 2012

Neurourology and Urodynamics

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Section: Discussionmentioning

confidence: 99%

Usefulness of dynamic urethral resistance relation (DURR) measurement for differential diagnosis between static and dynamic urinary obstruction in male spinal cord injury patients

Chamorro

Salinas

López

et al. 2012

Neurourology and Urodynamics

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“…For scientific neurophysiological investigations a sophisticated technique is required, including needle electrodes and "high-tech" recording equipment (Blaivas, 1983). However, most urodynamic equipment is capable of displaying integrated EMG data on a strip chart recorder and is sufficient for routine EMG studies.…”

Section: Physiological and Technical Considerationsmentioning

confidence: 91%

Disposable Vaginal Surface Electrode for Urethral Sphincter Electromyography

Lose

Andersen

Kristensen

1987

British Journal of Urology

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During the last 2 years we have developed a disposable vaginal surface electrode for electromyographic (EMG) recording from the urethral striated sphincter. We describe the design of the electrode and report the results of laboratory testing, including directional selectivity of the electrode, electrode impedance, testing for movement artefacts and stability of position. Clinical studies which included 138 cystometries with sphincter EMG, 133 pressure-flow EMG studies and four urethral pressure profile studies with sphincter EMG, demonstrated that the electrode gave technically good and reliable electromyographic data. The registration caused no discomfort to the patient and did not disturb the act of micturition. We recommend this technique for the evaluation of urethral striated muscle activity during urodynamic studies in women, since it is simple, inexpensive and reliable.

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“…However, there is not necessarily a parallel change in the activity of each of the two sphincters, especially not in patients with neurogenic bladders [Vereecken and Verduyn, 1970;Nordling and Meyhoff, 1979;Koyanagi et al, 19821. In healthy humans the spontaneous tonic activity has been described as increasing gradually during filling cystometry , thus indicating a pure facilitatory influence of bladder distension on the sphincter motoneurons [Diokno et al, 1974;Sundin and PetersCn, 1975;Vereecken et al, 1975;Blaivas et al, 1977;Blaivas, 19831. Both inhibitory and facilitatory responses to bladder stimuli have been recorded [Bors and Blinn, 19571, and synergic external sphincter relaxation following a reflex detrusor contraction has also been observed in paraplegic patients [Rudy et al, 19881.…”

Section: Introductionmentioning

confidence: 97%

Vesico‐anal influences in healthy intact humans: Quantificated by responses in the external anal sphincter following transcranial cortical stimulation

Hansen

Holmgren²,

Sp∠berg

et al. 1990

Neurourology and Urodynamics

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EMG responses in the external anal sphincter (EAS), the rectus abdominis muscle (RA), and the anterior tibia1 muscle (TA) were recorded following single magnetic transcranial cortical stimulations (TCCS) in seven healthy volunteers. The responses in the EAS differed from the responses in the other muscles. They had comparatively long durations ranging from I to 2 seconds, no inhibitory periods were observed, and there was no tendency for habituation to occur following a limited number of stimuli. The responses recorded in the EAS were used as test responses in order to evaluate the excitability changes in the EAS motoneurons occurring during bladder filling. Cystometries with filling rates of 15, 50 and 200 mumin were done. During these cystometries TCCS were applied repeatedly, with constant strength, after each 50 ml of filling up to bladder capacity. The responses following TCCS changed in a highly reproducible way during bladder filling. After 100-200 ml of filling, the responses had longer latencies, diminished sizes, and shorter durations. When thc filling reached a level 50-150 ml below capacity, the responses in most subjects again became greater and the latencies shorter. The changes were believed to be physiological. It was concluded that the EAS motoneurons are under both inhibitory and facilitatory influence during bladder filling in intact healthy humans. Facilitatory influences are often observed when the bladder is filled close to capacity. At lower bladder volumes the observed influence is always inhibitory. A decrease in the EMG activity of the EAS during filling cystometry should consequently not be regarded as a pathological response,

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Sphincter Electromyography

Cited by 33 publications

References 41 publications

Usefulness of dynamic urethral resistance relation (DURR) measurement for differential diagnosis between static and dynamic urinary obstruction in male spinal cord injury patients

Usefulness of dynamic urethral resistance relation (DURR) measurement for differential diagnosis between static and dynamic urinary obstruction in male spinal cord injury patients

Disposable Vaginal Surface Electrode for Urethral Sphincter Electromyography

Vesico‐anal influences in healthy intact humans: Quantificated by responses in the external anal sphincter following transcranial cortical stimulation

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