Air Filled Manometry (Anopress): Results in an High Volume Coloproctological and Pelvic Center

Background: Functional anorectal disorders are difficult to diagnose and often require clinical tests thatstudy the function beyond the anatomy of the pelvic floor. Manometry is one of the mostused. Recently, THD Anopress manometer has been introduced to facilitate thesemeasurements. Aim: The aim of this study is to provide standard and pathological values observed in people with anorectal pathology due to functional disorders in order to facilitate interpretating results. Methods: This is a retrospective observational study conducted from 2020-2022 involving 300 patientswith functional anorectal disorders that had access to our coloproctological and pelvicdepartment. Inclusion criteria are patient with obstructed defecation syndrome, anal fissuresand fecal incontinence. Exclusion criteria are: psychiatric disorders, inflammatory boweldiseases and age lower than 18 years. Results: In our experience the normal sphincteric tone in a healthy patient is between 30 to 40 mmHg.Anal reflex in a healthy patient is attested from 40 to 50 mmHg and the cough reflex underfrom 50 to 60 mmHg. The squeeze value is almost 100% higher than the basal one. The anorectal reflex normally is lower than the resting value but we obtained higher values even in asymptomatic patients.From our data we have noticed that in patients suffering from anal fissure the resting pressuremostly was normal but squeeze pressure usually was 200% higher than the resting.In patient with obstructed defecation syndrome the anorectal reflex is usually higher than the normal values. Conclusion: THD Anopress manometer is portable and allows you to use a normal clinical room toperform the functional study despite the use needs special expertise, in comparison to thetraditional water perfused manometer, Anopress can be easily used. This study is intended to help other physicians to interpret the results due to insufficient experience with this new device.