Analysis of biomechanical parameters extracted from anorectal manometry of fecally-continent and incontinent patients

Abstract

Objective: to evaluate the average resulting area from the Pressure x Time curves resulting from the manometric anorectal exam and compare it with the support capacity of voluntary squeeze.Materials and Methods: the data set was represented by data from 11 exams from continent patients and eight exams from patients with grade III fecal incontinence. Análisis de parámetros biomecánicos extraídos de la manometría rectoanal de pacientes con continencia e incontinencia fecalObjetivo: evaluar el área media resultante proveniente de las curvas Presión versus Tiempo pertenecientes al examen manometría rectal y afrontarla con la capacidad de sustentación.Materiales y Métodos: la casuística fue representada por datos de 11 exámenes de pacientes moderados y ocho exámenes de pacientes con incontinencia fecal grado III. Por medio del lenguaje computacional R y del algoritmo desarrollado fueron delineadas las curvas manométricas y calculadas las áreas y capacidades de sustentación. Resultados: los medios resultantes de la capacidad de sustentación de pacientes moderados y con incontinencia fecal grado III fueron 33,07 segundos y 30,76 segundos (p>0,05) y las de la área, 2362,04 mmHg x según y 947,92 mmHg x según (p<0,05), respectivamente. Conclusión: el área media resultante fue capaz de diferenciar los pacientes continentes de los incontinentes y demuestra ser un posible parámetro en el análisis del comportamiento biomecánico relacionado a los mecanismos de continencia rectal.

Anorectal Manometry Standard of a Brazilian Population at Productive Age Without Pelvic Floor Disorders: A Prospective Volunteered Study

“…It is an important examination and used in research centers, clinics or specialized hospitals searching for anorectal disorders 22 , 24 ; it may suggest the diagnosis and guide the management 15 , 22 , 24 . This anorectal physiology test has a well-established impact in the evaluation of the abnormalities of the anorectal sphincter function and anal coordination during defecation 1 , 7 , 10 , 18 , 23 .…”

“…Approximately 60% of patients with symptoms of anal incontinence may present normal manometric values 16 , 19 . Anorectal manometry clinical usefulness may be limited by the variation of types of devices used in the market, due to a deficiency of standardized protocols in different facilities and what are considered the normal parameters in healthy individuals without pelvic floor disorders 7 , 13 , 18 .…”

A Novel Nonlinear Parameter Estimation Method of Soft Tissues

“…Many studies had been reported in modeling complex elasticity properties, and biomechanical models are widely used due to the high accuracy achieved [9] , [10] . However, these models are complicated [11] , [12] , and the accuracy obtained relies on the accuracy of tissue geometry modeling and measurements of forces and deformations, as well as the rich excitation of material regimes [8] . Another commonly used model is the mass-spring model.…”