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Abstract Introduction The present study aims to identify normal high-resolution anorectal manometry (HRAM) values and related factors in healthy Vietnamese adults. Methods The present cross-sectional study was conducted at the Viet Duc hospital, Hanoi, Vietnam, during April and May 2019. Healthy volunteers were recruited to participate in the study. Anorectal measurement values from the digestive tract, including pressure, were recorded. Results A total of 76 healthy volunteers were recruited. The mean functional anal canal length was 4.2 ± 0.5 cm, while the mean anal high-pressure zone length was 3.4 ± 0.5 cm. Themean defecation index was 1.4 ± 0.8, with values ranging from 0.3 to 5.0. The mean threshold volume to elicit the rectoanal inhibitory reflex (RAIR) was 18.1 mL. The mean rectal sensation values were 32.4mL, 81.6mL, and 159 mL for first sensation, desire to defecate, and urge to defecate, respectively. Dyssynergic patterns occurred in ~ 50% of the study participants and included mainly types I (27.6%) and III (14.6%). There were significant differences between male and female patients in terms of maximum anal squeeze pressure, maximum anal cough pressure, maximum anal strain pressure, maximum rectal cough pressure, and maximum rectal strain pressure (all p<0.01). Conclusions The present study establishes normal HRAM values in healthy Vietnamese adults, particularly regarding normal values of anorectal pressure and rectal sensation. Further studies that include larger sample sizes should be conducted to further confirm the constants and their relationships.
Resumo Introdução O presente estudo tem como objetivo identificar valores normais de manometria anorretal de alta resolução e fatores relacionados em adultos vietnamitas saudáveis. Métodos O presente estudo transversal foi conduzido no hospital Viet Duc, Hanói, Vietnã, durante abril e maio de 2019. Voluntários saudáveis foram recrutados para participar do estudo. Valores de medição anorretal, incluindo pressão do trato digestivo, foram registrados. Resultados Um total de 76 voluntários saudáveis foram recrutados. O comprimento funcional médio do canal anal foi de 4,2 ± 0,5 cm, enquanto o comprimento médio da zona anal de alta pressão foi de 3,4 ± 0,5 cm. O índice médio de defecação foi de 1,4 ± 0,8, com valores variando de 0,3 a 5,0. O volume limite médio para eliciar o reflexo inibitório retoanal (RAIR, sigla em inglês) foi de 18,1 mL. Os valores médios da sensação retal foram 32,4mL, 81,6mL e 159 mL para a primeira sensação, o desejo de defecar e a urgência de defecar, respectivamente. Os padrões dissinérgicos ocorreram em aproximadamente 50% dos participantes do estudo e incluíram principalmente os tipos I (27,6%) e III (14,6%). Houve diferenças significativas entre homens e mulheres na pressão de compressão anal máxima, pressão de tosse anal máxima, pressão de distensão anal máxima, pressão de tosse retal máxima e pressão de distensão retal máxima (todos p<0,01). Conclusões O presente estudo estabelece valores normais de HRAM em adultos vietnamitas saudáveis, particularmente no que diz respeito aos valores normais de pressão anorretal e sensação retal. Mais estudos que incluam tamanhos de amostra maiores devemser realizados a fim de confirmar melhor as constantes e suas relações.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Anal Canal/anatomy & histology , Manometry/standards , Manometry/statistics & numerical dataABSTRACT
Resumen La manometría anorrectal es la técnica más utilizada para evaluar la función anorrectal y así detectar las anormalidades funcionales del esfínter anal y de coordinación anorrectal. En nuestro laboratorio de fisiología realizamos aproximadamente 15 estudios de manometría anorrectal de alta resolución a la semana, por lo que consideramos que es de vital importancia realizarlo de forma adecuada y tener una correcta interpretación. Mediante este artículo deseamos compartir nuestro protocolo de realización de manometría anorrectal de alta resolución con base en la literatura más relevante.
Abstract Anorectal manometry is the most commonly used technique to evaluate anorectal functioning and coordination and detect functional abnormalities of the anal sphincter. In our physiology laboratory we perform approximately 15 high resolution anorectal manometry studies each week. We consider that proper performance and correct interpretation are vitally important. We want to share our high resolution anorectal manometry protocol based on the most relevant literature through this article.
Subject(s)
Humans , Anal Canal , Physiology , Manometry , LiteratureABSTRACT
Objective@#To evaluate the effect of biofeedback training on bowl function among rectal cancer patients with chemoradiotherapy and temporary enterostomy.@*Methods@#Using randomized controlled trial design, 109 rectal cancer patients were randomly divided into three groups, the first blank control group, the second group pelvic floor muscle exercise group, the third group biofeedback group. High resolution anorectal manometry was used for 6 longitudinal traces in 16 months. Data of bowel function were collected by Memorial Sloan Kettering Cancer Center (MSKCC) Bowel Function Instrument.@*Results@#The main effect of the change of five indicators, anal resting pressure, rectal resting pressure, maximum squeeze pressure, maximum squeeze time and high pressure zone, was time. The other four indicators, rectal volume at first senory, rectal volume at sense of convenience, maximal tolerable rectal volume and rectal compliance, among patients of biofeedback group were (32.71±5.00) ml, (74.26±8.30) ml, (188.40±12.68) ml, (5.69±1.18) ml/kPa and (68.09±6.38). The rectal volume at first senory, rectal volume at sense of convenience, maximal tolerable rectal volume and rectal compliance, among patients of biofeedback group were significant higher than blank control group and pelvic floor muscle exercise group (F=3.589-26.826, P<0.05).@*Conclusion@#The biofeedback could significantly improve the sensory indicators of patients with middle and low rectal cancer. High-resolution anorectal manometry could effectively evaluate the effect of biofeedback training in patients with middle and low rectal cancer.
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Objective To explore the normal values for two-dimension solid state high resolution anorectal manometry (HRAM) in healthy adult volunteers.Methods The healthy adult volunteers were recruited by advertisement and underwent solid state HRAM in the left lateral position.Anorectal pressures and rectal sensation were recorded and analyzed.Results (1) A total of 126 Chinese healthy adult volunteers (male:50 cases (39.7％);age:(37.5 ± 14.2) years old) were recruited in this study.(2)Mean anal resting pressure (MERP) was (71.8 ± 17.3) mmHg (1 mmHg =0.133 kPa).Maximum anal resting pressure (MARP) was (79.3 ± 17.8) mmHg,Maximum anal squeeze pressure (MSP) was (178.7 ± 52.8) mmHg.Anal high pressure zone (HPZ) length was (3.4 ± 0.6) cm.During simulated evacuation,residual anal pressure (RAP) was (63.8 ±20.5) mmHg,and anal relaxation rate (ARR) was (37.0 ± 11.5) ％.Rectal threshold volume for first sensation (FST),desire to defecate (DDT),urgency to defecate (UDT) and maximum discomfort (MDT) was (47.4 ±10.0) ml,(84.5 ±18.2) ml,(125.8 ± 28.5) ml,and (175.5 ±36.1) ml,respectively.(3) Compared with female subjects,male subjects had higher MSP [(211.0 ± 50.7) mmHg vs (157.5 ± 42.5) mmHg],RAP [(71.6 ± 18.1) mmHg vs (58.8 ± 20.5) mmHg]and rectal MDT[(187.0 ±36.4) mmHg vs (168.0 ±34.1)mmHg],but lower ARR [(32.1 ±8.0)％ vs (40.2 ±12.3)％],all P＜0.01.(4) MERP,MARP,MSP and rectal MDT were higher in young group (≤ 40 years old),all P ＜ 0.05.Conclusions These observations provide normal values for two-dimension solid state HRAM,which have significant difference between genders and different age groups.
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Aims: Anorectal manometry is the current gold standard to explore anorectal functional disorders. Recently, three-dimensional high-resolution anorectal manometry (3DHRAM) was developed. However, although procedures are usually performed in the left lateral decubitus position, anorectal symptoms usually occur in the erect or in the sitting position. Our aim was to prospectively compare the values obtained with 3DHRAM in the left lateral decubitus position versus the erect position. Study Design and Setting: A monocentric prospective study was conducted at a tertiary referral center, in the Department of Gastroenterology, Hôpital Nord, Marseille, France. Study Duration: Study was conducted from June 2013 to March 2014. Methodology: All patients referred to our center for 3DHRAM and endoanal ultrasonography to explore faecal incontinence or constipation were eligible. The 3DHRAM was successively performed by the same operator in the left lateral decubitus and then in the erect position. For each patient, the body mass index, the values of the KESS score or of the Wexner score were systematically rated. Results: Forty patients were included in this prospective study (20 with constipation, 20 with faecal incontinence). The median anal resting pressure was the only significantly different parameter between the left lateral decubitus and the erect position, both in patients suffering from constipation or from faecal incontinence (p=0.02 and p<0.001 respectively). All pressures values, as well as anismus diagnosis, were well correlated between the two positions, except the high-pressure zone, the sensation threshold and the need to defecate. Conclusion: In this study, only the median anal resting pressure was significantly different between the two positions. The good correlation between anal pressures values obtained in the two positions allows achieving 3DHRAM in the left lateral decubitus.