Defecation Patterns in Constipated Patients

Conditions

• Constipation by Outlet Obstruction

Eligibility Criteria

Sex

ALL

Age

21 Years - 75 Years

Healthy Volunteers

Accepted

Interventions

• Bisacodyl — DRUG
  Biscodyl a stimulant laxative is expected to stimulate rectal contraction and enhance expulsion of Fecobionics
• Atropin — DRUG
  Atropin is an anticholinergic drug that is expected to inhibit rectal contractions and make defecation more difficult.

Study Details

Chronic constipation (CC) is a common condition that affects up to 25% of the population in North America. It poses a major burden on the healthcare cost. The pathophysiology of this condition is poorly understood and consequently there are inadequate treatments. Current diagnostic tests provide incomplete and often conflicting information. Fecobionics is an electronic simulated stool that has the consistency and shape of normal stool. The device records pressures, cross-sectional area, orientation, bending, and shape of the rectum and anal canal simultaneously. The central hypothesis is that rectal peristalsis is a key component of the defecatory reflex which is not assessed in the current paradigm of diagnostic testing. The novel Fecobionics device will mimic the natural defecation and provide new mechanistic insights into the anorectal physiology and pathophysiology to facilitate the development of new treatments for CC. The Specific Aims are as follows: 1) Study the defecation dynamics in normal control subjects using Fecobionics. The investigators will establish the role of rectal contraction/peristalsis in the normal evacuation process. 2) Define the defecatory patterns in patients with CC associated with defecatory disorders. The investigators will determine if abnormalities of rectal contraction contribute to the CC. 3) Use a mathematical model of anorectal passage of Fecobionics for enhanced understanding of the normal and abnormal defecatory patterns, including the length-tension properties of the rectum and anal sphincter muscles. The proposal seeks to shift current CC research by providing a stool surrogate for examining the physiologic parameters of defecation reflex using a novel device that will record, pressure, deformability, biomechanics, vectoral and topographic changes in the rectum and anal canal. The noted parameters will be recorded using a wireless Fecobionics device that can examine in detail the mechanistic underpinnings (stress and deformation) of defecation reflex/process in health and disease. The impact of this project is that it assesses a novel, safe, low cost, less invasive, low-risk, radiation-free device in its ability to provide better understanding of evacuation and continence mechanisms and thereby facilitate future development of innovative therapies. The improvement can lead to improvement in diagnostic and therapeutic modalities and reduce healthcare costs associated with anorectal disorders.

Key Dates

Start date

Dec 19, 2022

Status verified

Oct 2025

Primary completion

Dec 30, 2026

Completion

Dec 30, 2026

Study Design

Enrollment

130 participants (estimated)

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

BASIC_SCIENCE

Arms

• Experimental: Effect of atropine on the defecation
  Atropine is an anticholinergic drug and expected to inhibit rectal contractions and inhibit evacuation of the rectal balloon. Each subject will be studied twice once with and once without atropine.
• Experimental: Effect of bisacodyl on the defecation
  Bisacodyl is a stimulant of rectal contraction and expected to facilitate evacuation of rectal balloon (fecobionics device). Each subject will be studied twice, once with and once without bisacodyl.

Primary Outcome Measure

Evacuation duration of rectal balloon. [ Time Frame: 3 years ]

Central Contacts

• Hans Gregersen,, PhD
  858-249-7400
  [email protected]
• Satish Rao, MD, PhD
  7067212238
  [email protected]

Locations (2)

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