Navegando por Palavras-chave "electrodiagnosis"
Agora exibindo 1 - 4 de 4
Resultados por página
Opções de Ordenação
- ItemAcesso aberto (Open Access)Pudendal nerve latency time in normal women via intravaginal stimulation(Sociedade Brasileira de Urologia, 2006-12-01) Cavalcanti, Geraldo A. [UNIFESP]; Manzano, Gilberto Mastrocola [UNIFESP]; Giuliano, Lydia M. [UNIFESP]; Nobrega, João Antonio [UNIFESP]; Srougi, Miguel [UNIFESP]; Bruschini, Homero [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)INTRODUCTION & OBJECTIVES: Studies of motor conduction for the efferent functional assessment of the pudendal nerve in women with pelvic dysfunctions have been conducted through researching distal motor latency times. The transrectal approach has been the classic approach for this electrophysiological examination. The objective of the present study is to verify the viability of the transvaginal approach in performing the exam, to establish normal values for this method and to analyze the influence of age, stature and parity in the latency value of normal women. MATERIALS AND METHODS: A total of 23 volunteers without genitourinary pathologies participated in this study. In each, pudendal motor latency was investigated through the transvaginal approach, which was chosen due to patient s higher tolerance levels. RESULTS: The motor response represented by registering the M-wave was obtained in all volunteers on the right side (100%) and in 13 volunteers on the left side (56.5%). The mean motor latency obtained in the right and left was respectively: 1.99 ± 0.41 and 1.92 ± 0.48 milliseconds (ms). There was no difference between the sides (p = 0.66). Latency did not correlate with age, stature or obstetric history. The results obtained in the present study were in agreement with those found by other researchers using the transrectal approach. CONCLUSION: The vaginal approach represents an alternative for pudendal nerve distal motor latency time, with similar results to those achieved through the transrectal approach. Normative values obtained herein might serve as a comparative basis for subsequent physiopathological studies.
- ItemAcesso aberto (Open Access)Pudendal somatosensory evoked potentials in normal women(Sociedade Brasileira de Urologia, 2007-12-01) Cavalcanti, Geraldo A. [UNIFESP]; Bruschini, Homero [UNIFESP]; Manzano, Gilberto Mastrocola [UNIFESP]; Nunes, Karlo Faria [UNIFESP]; Giuliano, Lydia M. [UNIFESP]; Nobrega, Joao Antonio [UNIFESP]; Srougi, Miguel [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP)OBJECTIVE: Somatosensory evoked potential (SSEP) is an electrophysiological test used to evaluate sensory innervations in peripheral and central neuropathies. Pudendal SSEP has been studied in dysfunctions related to the lower urinary tract and pelvic floor. Although some authors have already described technical details pertaining to the method, the standardization and the influence of physiological variables in normative values have not yet been established, especially for women. The aim of the study was to describe normal values of the pudendal SSEP and to compare technical details with those described by other authors. MATERIALS AND METHODS: The clitoral sensory threshold and pudendal SSEP latency was accomplished in 38 normal volunteers. The results obtained from stimulation performed on each side of the clitoris were compared to ages, body mass index (BMI) and number of pregnancies. RESULTS: The values of clitoral sensory threshold and P1 latency with clitoral left stimulation were respectively, 3.64 ± 1.01 mA and 37.68 ± 2.60 ms. Results obtained with clitoral right stimulation were 3.84 ± 1.53 mA and 37.42 ± 3.12 ms, respectively. There were no correlations between clitoral sensory threshold and P1 latency with age, BMI or height of the volunteers. A significant difference was found in P1 latency between nulliparous women and volunteers who had been previously submitted to cesarean section. CONCLUSIONS: The SSEP latency represents an accessible and reproducible method to investigate the afferent pathways from the genitourinary tract. These results could be used as normative values in studies involving genitourinary neuropathies in order to better clarify voiding and sexual dysfunctions in females.
- ItemSomente MetadadadosTemporal branch of facial nerve A normative study of nerve conduction(Assoc Arquivos Neuro- Psiquiatria, 2010-08-01) Silva, Paula Fabiana Sobral da; Lima, Maria Carolina Martins de; Figueiroa, Jose Natal [UNIFESP]; Lins, Otavio Gomes [UNIFESP]; Inst Med Integral Prof Fernando Figueira IMIP; Universidade Federal de Pernambuco (UFPE); Universidade de São Paulo (USP); Escola Pernambucana Med FBV IMIP; Universidade Federal de São Paulo (UNIFESP)The temporal branch of the facial nerve is particularly vulnerable to traumatic injuries during surgical procedures. It may also be affected in clinical conditions. Electrodiagnostic studies may add additional information about the type and severity of injuries, thus allowing prognostic inferences. The objective of the present study was to develop and standardize an electrophysiological technique to specifically evaluate the temporal branch of the facial nerve. Method: Healthy volunteers (n=115) underwent stimulation of two points along the nerve trajectory, on both sides of the face. The stimulated points were distal (on the temple, over the temporal branch) and proximal (in retro-auricular region). Activities were recorded on the ipsilateral frontalis muscle. The following variables were studied: amplitude (A), distal motor latency (DML) and conduction velocity (NCV). Results: Differences between the sides were not significant. The proposed reference values were: A >= 0.4 mV, DML <3.9 ms and NCV >= 40 m/s. Variation between hemifaces should account for less than 60% for amplitudes and latency, and should be inferior to 20% for conduction velocity. Conclusion: These measurements are an adequate way for proposing normative values for the electrophysiological evaluation of the temporal branch.
- ItemSomente MetadadadosUrethral sensory threshold and urethro-anal reflex latency in continent women(Springer, 2007-12-01) Cavalcanti, Geraldo de Aguiar; Bruschini, Homero; Manzano, Gilberto M.; Giuliano, Lydia P.; Nobrega, Joao Antonio M.; Srougi, Miguel; Universidade Federal de São Paulo (UNIFESP)Aims the sensory evaluation of the lower urinary tract is summarized in the bladder proprioceptive sensitivity during cystometry. Experimental studies suggest that abnormalities of the urethral innervation and micturition reflex can be related to the presence of continence disturbances. This study aimed to measure the urethral sensory threshold and the urethro-anal reflex latency in healthy volunteers, establishing reading criteria, comparing the results and technique used with the literature and verifying the effect of physiological factors.Materials and methods Thirty healthy female volunteers were studied. They had an absence of genital or urinary complaints and had undergone no previous pelvic or vaginal procedures. the measurement of the urethral sensory threshold and urethro-anal reflex latency were performed as described.Results the determination of the urethral sensory threshold and urethro-anal reflex latency were obtained in 96.6% of the volunteers. the electrophysiological parameters did not correlate with age, parity or number of vaginal deliveries. There was a positive association of the urethral sensory threshold with height. Technical aspects were considered and compared with those in the literature as well as the advantages and limitations of the method.Conclusions the measurement of the urethral sensory threshold and urethro-anal reflex latency presented consistent recordings. the urethral sensory threshold should be analyzed carefully in individuals with height above the population average. Subsequent observations are necessary to clarify their function in patients with continence disturbances and to measure the urethral function, but these values can be used as normal parameters for comparison.