Device to predict pelvic floor integrity during vaginal delivery: an intra- and interrater reliability study of the Epi-no distensibility measurement.

OBJECTIVE: To determine the test-retest reliability of the pelvic floor distensibility evaluation with Epi-no® device. METHODS: Prospective, blinded observational study with 32 women pregnant from 35 gestational weeks. An Epi-no® balloon was inflated within the pregnant woman's vagina and the maximum circumference achieved was measured using a standard metric measuring tape. Measurements were performed twice in a day by two physiotherapists in a randomized order. Intraobserver reproducibility was obtained with another evaluation 7-14 d after the initial examination. The intraclass correlation coefficient (ICC) was used to determine the intra and interrater reliability and the respective 95% confidence intervals with an alpha level of 0.05. RESULTS: From a total of 32 included pregnant women, 28 were analyzed; they were 29.3 (±5.97) years old, were at 37 (±1.3) weeks' gestation and presented a mean Epi-no® circumference of 20.4 (±2.4) cm. Regarding the intraobserver analysis, examiner 1 observed a maximum circumference of 20.6 (±2.6) cm in the first evaluation and 20.2 (±2.4) cm in the second evaluation, with good reliability (ICC = 0.85). Examiner 2 observed 19.7 (±2.4) cm in the first evaluation and 21.0 (±2.0) cm in the second one, with moderate reliability (ICC = 0.58). Regarding the interobserver analysis, there was good reliability on two evaluation days, with an ICC of 0.76 and 0.82, respectively. CONCLUSIONS: Epi-no® device is a reliable device for physiotherapists to measure pelvic floor distention during pregnancy.

Quantitative assessment of pelvic floor muscle extensibility in pregnant women with a perineal elasticity meter.

Objective: The objective of this study was to compare measurements of pelvic floor muscle extensibility in pregnant women obtained through the Epi-no® and perineal elasticity meter (PEM) devices.Methods: This was an observational, cross-sectional study with a consecutive sample, conducted in a prenatal care outpatient clinic. The pelvic floors of 62 healthy pregnant women with gestational ages between 35 and 40 weeks were assessed. Perineal extensibility was measured using the Epi-no® and PEM devices. Through the linear regression method, a formula was created to calculate the Epi-no® values from the PEM values. To determine the degree of relationship between both variables, Pearson's correlation coefficient was used.Results: In the comparison of the results for 62 pregnant women using the two perineal extensibility assessment methods, the value obtained in the Pearson correlation coefficient analysis (0.621) indicated a moderate relationship between the variables. This finding was not confirmed by the Kappa correlation test. When the measurements were classified into three groups, a slight correlation was identified (perineum with restrictions, moderate extensibility, and good extensibility).Conclusion: There was a relationship between Epi-no® and PEM from slight to moderate agreement.

Determination of a cutoff value for pelvic floor distensibility using the Epi-no balloon to predict perineal integrity in vaginal delivery: ROC curve analysis. Prospective observational single cohort study / Determinação de um valor de ponto de corte para a extensibilidade do assoalho pélvico pelo balão Epi-no para predizer integridade perineal no parto vaginal: análise pela curva ROC. Estudo prospectivo observacional de coorte única

CONTEXT AND OBJECTIVE: Several risk factors are involved in perineal lacerations during vaginal delivery. However, little is known about the influence of perineal distensibility as a protective factor. The aim here was to determine a cutoff value for pelvic floor distensibility measured using the Epi-no balloon, which could be used as a predictive factor for perineal integrity in vaginal delivery. DESIGN AND SETTING: Prospective observational single cohort study conducted in a maternity hospital. METHODS: A convenience sample of 227 consecutive at-term parturients was used. All women had a single fetus in the vertex presentation, with up to 9.0 cm of dilation. The maximum dilation of the Epi-no balloon was measured using a tape measure after it had been inflated inside the vagina up to the parturients' maximum tolerance. The receiver operating characteristic (ROC) curve was used to obtain the Epi-no circumference measurement with best sensitivity and specificity. RESULTS: Among the 161 patients who were included in the study, 50.9% underwent episiotomy, 21.8% presented lacerations and 27.3% retained an intact perineum. Age > 25.9 years; number of pregnancies > 3.4; number of deliveries > 2.2 and circumference measured by Epi-no > 21.4 cm were all directly correlated with an intact perineum. Circumference measurements using the Epi-no balloon that were greater than 20.8 cm showed sensitivity and specificity of 70.5% and 66.7% (area under curve = 0.713), respectively, as a predictive factor for an intact perineum in vaginal delivery. CONCLUSION: Circumferences greater than 20.8 cm achieved using the Epi-no balloon are a predictive factor for perineal integrity in parturients.

CONTEXTO E OBJETIVO: Diversos fatores de risco estão envolvidos nas lacerações do períneo durante o parto vaginal, contudo, pouco se sabe sobre a influência da extensibilidade perineal como um fator protetor. O objetivo foi avaliar o ponto de corte da extensibilidade do assoalho pélvico medido pelo balão Epi-no, o qual poderia ser usado como fator preditor de integridade perineal no parto vaginal. TIPO DE ESTUDO E LOCAL: Estudo prospectivo observacional de coorte única conduzido em maternidade. MÉTODOS: Uma amostra de conveniência de 277 parturientes consecutivas no termo foi utilizada. Todas as mulheres tinham feto único com apresentação cefálica fletida, com até 9,0 cm de dilatação. A máxima dilatação do balão Epi-no foi medida com fita métrica após a sua insuflação dentro da vagina até a tolerância máxima da parturiente. Uma curva característica de operação do receptor (ROC) foi utilizada para obter a medida da circunferência com a melhor sensibilidade e especificidade. RESULTADOS: Dentre as 161 pacientes que foram incluídas no estudo, 50,9% sofreram episiotomia, 21,8% lacerações e 27,3% tiveram o períneo intacto. Idade > 25,9 anos; número de gestações > 3,4; número de partos > 2,2; e medida do perímetro do Epi-no > 21,4 cm foram todos diretamente correlacionados com períneo intacto. Os valores do perímetro com o balão Epi-no que estavam acima de 20,8 cm mostraram sensibilidade e especificidade de 70,5% e 66,7% (área sob a curva = 0,713), respectivamente, como fator preditor de períneo intacto no parto vaginal. CONCLUSÃO: Circunferência medida pelo balão Epi-no maior que 20,8 cm é fator preditor de integridade perineal em parturientes.

Can Abdominal Hypopressive Technique Change Levator Hiatus Area?: A 3-Dimensional Ultrasound Study.

This study aimed to evaluate the levator hiatus area (LHA) at rest and during the performance of maximal pelvic floor muscle (PFM) contractions, during the abdominal hypopressive technique (AHT), and during the combination of PFM contractions (PFMCs) and the AHT. The study included 17 healthy nulliparous women who had no history of pelvic floor disorders. The LHA was evaluated with the patients in the lithotomy position. After a physiotherapist instructed the patients on the proper performance of the PFM and AHT exercises, 1 gynecologist performed the 3-dimensional translabial ultrasound examinations. The LHA was measured with the patients at rest. The PFMC alone, the AHT alone or the AHT in combination with a PFMC with 30 seconds of rest between the evaluations were performed. Each measurement was performed 2 times, and the mean value was used for statistical analysis. The Wilcoxon test was used to test the differences between the 2 maneuvers. Similar values were observed when comparing the LHA of the PFM at rest (12.2 ± 2.4) cm and during the AHT (11.7 ± 2.6) cm (P = 0.227). The AHT+ PFMC (10.2 ± 1.9) cm demonstrated lower values compared with AHT alone (11.7 ± 2.6) cm (P = 0.002). When comparing the PFMC (10.4 ± 2.1) cm with the AHT + PFMC (10.2 ± 1.9) cm, no significant difference (P = 0.551) was observed. During PFMC, the constriction was 1.8 cm; during the AHT, the constriction was 0.5 cm; and during the AHT + PFMC, it was 2 cm. The LHA assessed by 3-dimensional ultrasound did not significantly change with AHT. These results support the theory that AHT does not strengthen PFM.

Determination of a cutoff value for pelvic floor distensibility using the Epi-no balloon to predict perineal integrity in vaginal delivery: ROC curve analysis. Prospective observational single cohort study.

CONTEXT AND OBJECTIVE: Several risk factors are involved in perineal lacerations during vaginal delivery. However, little is known about the influence of perineal distensibility as a protective factor. The aim here was to determine a cutoff value for pelvic floor distensibility measured using the Epi-no balloon, which could be used as a predictive factor for perineal integrity in vaginal delivery. DESIGN AND SETTING: Prospective observational single cohort study conducted in a maternity hospital. METHODS: A convenience sample of 227 consecutive at-term parturients was used. All women had a single fetus in the vertex presentation, with up to 9.0 cm of dilation. The maximum dilation of the Epi-no balloon was measured using a tape measure after it had been inflated inside the vagina up to the parturients' maximum tolerance. The receiver operating characteristic (ROC) curve was used to obtain the Epi-no circumference measurement with best sensitivity and specificity. RESULTS: Among the 161 patients who were included in the study, 50.9% underwent episiotomy, 21.8% presented lacerations and 27.3% retained an intact perineum. Age > 25.9 years; number of pregnancies > 3.4; number of deliveries > 2.2 and circumference measured by Epi-no > 21.4 cm were all directly correlated with an intact perineum. Circumference measurements using the Epi-no balloon that were greater than 20.8 cm showed sensitivity and specificity of 70.5% and 66.7% (area under curve = 0.713), respectively, as a predictive factor for an intact perineum in vaginal delivery. CONCLUSION: Circumferences greater than 20.8 cm achieved using the Epi-no balloon are a predictive factor for perineal integrity in parturients.

Distensibility and strength of the pelvic floor muscles of women in the third trimester of pregnancy.

OBJECTIVE: The objective of this study was to compare the role of the pelvic floor muscles between nulliparous and multiparous women in the third trimester of pregnancy, by analyzing the relationship between electrical activity (surface electromyography-EMG), vaginal palpation (modified Oxford scale), and perineal distensibility (Epi-no). METHODS: This was an observational cross-sectional study on a sample of 60 healthy pregnant women with no cervical dilation, single fetus, gestational age between 35 and 40 weeks, and maternal age ranging from 15 to 40 years. The methods used were bidigital palpation (modified Oxford scale, graded 0-5), surface EMG (electrical activity during maximal voluntary contraction), and perineal distensibility (Epi-no device). The Pearson correlation coefficient (r) was used to analyze the Epi-no values and the surface EMG findings. The Kruskal-Wallis test was used to compare the median values from surface EMG and Epi-no, using the modified Oxford scale scores. RESULTS: Among the 60 patients included in this study, 30 were nulliparous and 30 multiparous. The average maternal age and gestational age were 26.06 (± 5.58) and 36.56 (± 1.23), respectively. It was observed that nulliparous women had both higher perineal muscle strength (2.53 ± 0.57 versus 2.06 ± 0.64; P = 0.005) and higher electrical activity (45.35 ± 12.24 µV versus 35.79 ± 11.66 µV; P = 0.003), while among the multiparous women, distensibility was higher (19.39 ± 1.92 versus 18.05 ± 2.14; P = 0.013). We observed that there was no correlation between perineal distensibility and electrical activity during maximal voluntary contraction (r = - 0.193; P = 0.140). However, we found a positive relationship between vaginal palpation and surface electromyography (P = 0.008), but none between Epi-no values (P = 0.785). CONCLUSION: The electrical activity and muscle strength of the pelvic floor muscles of the multiparous women were damaged, in relation to the nulliparous women, while the perineal distensibility was lower in the latter group. There was a positive relationship between surface EMG and the modified Oxford scale.

Parturient perineal distensibility tolerance assessed by EPI-NO: an observational study.

OBJECTIVE: To determine how parturient women tolerate the use of a perineal distensibility assessment technique using the EPI-NO device. METHODS: An observational study with a total of 227 full-term parturient women was performed. During the evaluation with EPI-NO, parturient patients were asked about their sensation of discomfort. The degree of discomfort was measured using the Visual Analogue Scale, with a score from zero to 10. The Mann-Whitney test was applied to assess perineal distensibility measured by EPI-NO and the degree of discomfort caused by the test according to parity. The relation between perineal distensibility and discomfort was analyzed by using the Spearman correlation test (r). RESULTS: The test with EPI-NO caused only slight discomfort (mean Visual Analogue Scale of 3.8), and primiparous women reported significantly greater discomfort (mean Visual Analogue Scale of 4.5) than did multiparous (mean Visual Analogue Scale=3.1), with p<0.001 women. A negative correlation was observed, in other words, the greater the perineal distensibility on the EPI-NO, the lower the pain reported by the patients (r=-0.424; p<0.001). CONCLUSION: The assessment of perineal distensibility with EPI-NO was well tolerated by the parturient women.

Parturient perineal distensibility tolerance assessed by EPI-NO: an observational study / Tolerância da parturiente à extensibilidade perineal avaliada pelo EPI-NO: estudo observacional / Tolerância da parturiente à extensibilidade perineal avaliada pelo EPI-NO: estudo observacional

Objective : To determine how parturient women tolerate the use of a perineal distensibility assessment technique using the EPI-NO device. Methods : An observational study with a total of 227 full-term parturient women was performed. During the evaluation with EPI-NO, parturient patients were asked about their sensation of discomfort. The degree of discomfort was measured using the Visual Analogue Scale, with a score from zero to 10. The Mann-Whitney test was applied to assess perineal distensibility measured by EPI-NO and the degree of discomfort caused by the test according to parity. The relation between perineal distensibility and discomfort was analyzed by using the Spearman correlation test (r). Results : The test with EPI-NO caused only slight discomfort (mean Visual Analogue Scale of 3.8), and primiparous women reported significantly greater discomfort (mean Visual Analogue Scale of 4.5) than did multiparous (mean Visual Analogue Scale=3.1), with p<0.001 women. A negative correlation was observed, in other words, the greater the perineal distensibility on the EPI-NO, the lower the pain reported by the patients (r=-0.424; p<0.001). Conclusion : The assessment of perineal distensibility with EPI-NO was well tolerated by the parturient women. .

Objetivo : Determinar como a mulher parturiente tolera o uso de uma nova técnica de extensibilidade perineal, por meio do aparelho EPI-NO. Métodos : Estudo observacional com um total de 227 gestantes a termo. Durante a avaliação pelo EPI-NO, as parturientes foram perguntadas sobre a sensação de desconforto. O grau de desconforto foi medido usando a Escala Visual Analógica, com escore entre zero a 10. O teste de Mann-Whitney foi usado para avaliar a extensibilidade perineal avaliada pelo EPI-NO e o grau de desconforto causado pelo teste de acordo com a paridade. A relação entre extensibilidade perineal e desconforto foi avaliada pelo teste de correlação de Spearman (r). Resultados : O teste com EPI-NO causou apenas leve desconforto (média da Escala Visual Analógica de 3,8), sendo que as primíparas reportaram mais desconforto de modo significativo (média da Escala Visual Analógica de 4,5) que as multíparas (média da Escala Visual Analógica de 3,1), com p<0,001. Observou-se correlação negativa, ou seja, a maior extensibilidade no EPI-NO foi acompanhada de menor dor referida pelas pacientes (r=-0,424; p<0,001). Conclusão : A avaliação da extensibilidade perineal com EPI-NO foi bem tolerada pelas parturientes. .

Electromyographic evaluation of pelvic floor muscles in pregnant and nonpregnant women.

INTRODUCTION AND HYPOTHESIS: We compared the maximal voluntary contraction (MVC) and strength of pelvic floor muscles (PFM) of pregnant and nonpregnant women using surface electromyography (SEMG). METHODS: Fifteen pregnant primiparous women and 15 nulliparous nonpregnant women were evaluated. The healthy pregnant women were in the third trimester of pregnancy with a single fetus and did not have any neuromuscular alterations. The nonpregnant women did not present with PF dysfunctions and, as with the pregnant women, did not have any previous gynecological surgeries or degenerative neuromuscular alterations. The evaluation methods used were digital palpation (Oxford Grading Scale, which ranges from 0 to 5) and SEMG. In the EMG exam, MVC activity was evaluated, and the better of two contractions was chosen. Before the evaluation, all women received information about PFM localization and function and how to correctly contract PFM. RESULTS: In the EMG evaluation, MVC was significantly greater in the nonpregnant group (90.7 µv) than in the pregnant group (30 µv), with p < 0.001. The same results were observed after vaginal palpation, measured by the Oxford scale, which presented an average of 2.1 in the pregnant group and 4.5 in the nonpregnant group (p = 0.005). CONCLUSION: In comparison to nulliparous women, pregnant women demonstrated worse PFM function with decreased strength and electrical activity.

Eletromiografia de superfície para avaliação dos músculos do assoalho pélvico feminino: revisão de literatura / Evaluation of female pelvic floor muscles using surface electromyography: literature review

A eletromiografia de superfície tem grande importância clínica e de pesquisa para o fisioterapeuta. Apesar de captar a atividade elétrica promovida pelo recrutamento das unidades motoras, há boa correlação entre o número de unidades ativadas e a força muscular. É um dos métodos de maior especificidade na avaliação do assoalho pélvico, embora não haja consenso em relação à sua aplicação. Essa revisão de literatura foi desenvolvida com o objetivo de agrupar as informações sobre o uso da eletromiografia de superfície na avaliação do assoalho pélvico. Foram pesquisados artigos nas bases de dados Medline, PubMed, Lilacs, SciELO e Biblioteca Cochrane, e selecionados os que avaliassem o assoalho pélvico feminino por meio de eletromiografia de superfície. Apesar de sua metodologia ainda carecer de padronização, é um instrumento que deve ser considerado nas pesquisas científicas em nosso meio, pois parece apresentar boa reprodutibilidade e confiabilidade. Pacientes com disfunções do assoalho pélvico possuem alterações no tempo de ativação dos músculos do assoalho pélvico (MAP) e músculos abdominais. Quanto à gestação e puerpério, ainda faltam evidências sobre possíveis alterações da ativação elétrica dos MAP nesses períodos.

Surface electromyography has clinical and research importance for the physiotherapist. Although capturing electrical activity promoted by recruitment of motor units, there is a good correlation between the number of activated units and muscle strength. This is one of the methods of higher specificity in pelvic floor evaluation, although the lack of consensus regarding its application. The aim of this literature review was to cluster information regarding to the use of surface electromyography in the evaluation of pelvic floor. Papers were searched in Medline, Pubmed Lilacs, SciELO and Cochrane Library. Were selected papers which methods used surface electromyography to evaluate the pelvic floor. Although its methodology still lacks standardization, is an instrument that should be considered in scientific research in our country because it seems to have good reproducibility and reliability. Women with pelvic floor disorders have changes in the activation time of the pelvic floor muscles (PFM) and abdominal muscles. With respect to pregnancy and postpartum, there is a lack of evidence on possible changes in electrical activation of PFM in these periods.

Pelvic floor muscle and transversus abdominis activation in abdominal hypopressive technique through surface electromyography.

AIMS: The abdominal hypopressive technique (AHT) is performed mainly via transversus abdominis (TrA) activation and has been indicated for pelvic floor muscle (PFM) disorders. In some European countries, this technique has become widely used. This study aimed to investigate PFM and TrA activation during the AHT through surface electromyography. METHODS: Thirty-four nulliparous physical therapists in good general health were asked to participate in the trial. To ascertain a correct PFM contraction, each of the participants was assessed by inspection and digital palpation. Ability to contract the TrA was assessed by surface electromyography and AHT training was given before analysis. TrA and PFM activity was recorded using surface electromyography. RESULTS: The mean age of the volunteers was 28.1 (±6.0) years and the mean body mass index was 23.7 (±3.3) kg/m(2) . More than half of the volunteers were physically active (61.3%) and regularly performed PFM training (52.9%) but not TrA exercises (58.8%). Although the AHT activates the PFM when compared to resting tone (P < 0.001), this method is significantly less effective than PFM alone (P < 0.001). Additionally, the combination of the two techniques (AHT + PFM) was similarly effective as isolated PFM contraction (P = 0.586). Although the AHT activated the TrA significantly more than did PFM alone (P = 0.002), the addition of PFM contraction to the AHT significantly increased the amount of TrA activation (P < 0.001). CONCLUSIONS: Based on our results, the AHT is less effective than PFM contraction alone, and adding PFM contraction to AHT also improves the TrA contraction.

Episiotomia: revendo conceitos / Episiotomy: concepts review

A episiotomia ainda é o procedimento cirúrgico mais utilizado em obstetrícia. Seu uso rotineiro pode levar a uma série de complicações, dentre as quais se destacam: infecção, hematoma, rotura de períneo de terceiro e quarto graus, dispareunia e lesão do nervo pudendo. Este artigo é uma revisão de literatura que aborda o histórico, as indicações, as complicações, os motivos que ainda incentivam sua prática rotineira e os custos envolvidos na episiotomia. Foram utilizadas as bases de dados da Medline, Lilacs, Pubmed e Biblioteca Cochrane. Embora as evidências científicas indiquem que o uso restrito da episiotomia deva ser incorporado em todos os serviços, na América Latina verificamos que sua utilização é muito elevada, podendo atingir taxas de até 90 porcento. Sugerimos que as instituições hospitalares realizam treinamentos e atualizações acerca das diretrizes baseadas em evidências na obstetrícia.

Episiotomy is still the most widely used surgical procedure in obstetrician. Its frequent use may cause complications such as infection, 3rd and 4th grades of perineal lacerations, dyspaurenia and pudendal nerve injury. This paper is a literature review that comprises history, indications, complications, reasons that encourage the routine practice and costs implicated in episiotomy. Medline, Lilacs, Pubmed and Cochrane Library were used as databases. Although evidences suggest that restrictive use of episiotomy may be part of obstetrical care, in the Latin America its use is very common and may reach rates of up to 90 percent. It is suggested that hospital institutions should provide updating about obstetrics evidence based guidelines.