Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Coulometry: Overview

Coulometry: Overview

Coulometry is one of the rapid, most accurate, and precise analytical techniques that determine the quantity of an analyte by measuring the electrical charge needed for its complete electrolysis without using any analytical standards. The total charge passed during electrolysis correlates with the analyte amount by Faraday's laws of electrolysis. For accurate coulometric measurements, a charge equal to Faraday's constant multiplied by the number of electrons involved in the relevant...

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...

Controlled-Current Coulometry: Overview

Controlled-Current Coulometry: Overview

Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...

Capillary Electrophoresis: Instrumentation

Capillary Electrophoresis: Instrumentation

Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...

Pulse rhythm

Pulse rhythm

Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...

Controlled-Current Coulometry: Coulometric Titration

Controlled-Current Coulometry: Coulometric Titration

Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Expert Clinical Consensus on Body Surface Gastric Mapping Phenotypes for Gastroduodenal Disorders: 'Auckland Classification' v1.0.

Neurogastroenterology and motility·2026

Same author

Validation of the youth version of the Alimetry® Gut-Brain Wellbeing Survey: a mental health scale for young people with chronic gastroduodenal symptoms.

World journal of pediatrics : WJP·2026

Same author

Gastric electrophysiology.

Expert review of gastroenterology & hepatology·2026

Same author

Spatially and temporally precise microbiome profiling in the small intestine using the SIMBA capsule with X-ray tracking.

Frontiers in microbiomes·2026

Same author

Adolescent Normative Intervals for Body Surface Gastric Mapping: Spectral Analysis.

Neurogastroenterology and motility·2026

Same author

Association between gastric rhythm and gastroesophageal reflux defined by simultaneous body surface gastric mapping and 24-h pH testing.

American journal of physiology. Gastrointestinal and liver physiology·2025

Same journal

Lessons from extended induction and practical evidence for improving tofacitinib therapy in ulcerative colitis.

World journal of gastroenterology·2026

Same journal

Small animal <i>ex vivo</i> machine perfusion of the liver: A comprehensive literature review.

World journal of gastroenterology·2026

Same journal

Comparable remission and health care use in real-world inflammatory bowel disease patients initiating originator biologics <i>vs</i> biosimilars.

World journal of gastroenterology·2026

Same journal

Diagnosis and management of metabolic dysfunction-associated steatohepatitis in patients with chronic hepatitis B infection.

World journal of gastroenterology·2026

Same journal

Simultaneous treatment of concomitant achalasia coexisting with epiphrenic diverticulum: The practice of submucosal tunneling technique.

World journal of gastroenterology·2026

Same journal

Lianhe Xiaozhi ointment ameliorates metabolic dysfunction-associated steatotic liver disease <i>via</i> peroxisome proliferator-activated receptor alpha pathway activation.

World journal of gastroenterology·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 18, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Published on: October 16, 2013

Colometer: a real-time quality feedback system for screening colonoscopy.

Dobromir Filip¹, Xuexin Gao, Leticia Angulo-Rodríguez

¹Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada.

World Journal of Gastroenterology

|September 13, 2012

Summary

This summary is machine-generated.

A new automated colonoscopy quality assessment system shows strong agreement with expert endoscopist ratings. This real-time feedback tool for colonoscopy quality evaluation shows promise for improving procedural standards.

Keywords:

Bowel preparation Colon cancer Colonoscopy Quality assurance Quality improvement Withdrawal time

Related Experiment Videos

Last Updated: May 18, 2026

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Published on: October 16, 2013

Area of Science:

Gastroenterology
Medical Imaging
Health Informatics

Background:

Colonoscopy quality is crucial for effective cancer screening and patient outcomes.
Objective assessment of colonoscopy quality traditionally relies on subjective endoscopist review.
There is a need for automated, real-time systems to provide consistent quality feedback.

Purpose of the Study:

To evaluate the performance of a novel software-based system for automated colonoscopy quality assessment.
To compare automated quality ratings with those provided by experienced endoscopists.

Main Methods:

A software system utilizing image processing algorithms analyzed live video signals for image clarity, withdrawal velocity, and bowel preparation.
Automated quality ratings were computed based on the percentage of withdrawal time with adequate visualization.
Automated ratings were compared to blinded, expert endoscopist assessments using Spearman correlation.

Main Results:

The automated system demonstrated better visualization during withdrawal compared to insertion in polyp-free videos (79% vs. 50%, P < 0.01).
The automated system's median quality rating (3.45) showed strong correlation with endoscopist ratings (3.00, ρ=0.65, P=0.01).
Good correlation was found between automated ratings and endoscopist withdrawal speed ratings (r=0.59, P=0.03), but not image quality ratings (r=0.41, P=0.15).

Conclusions:

A novel automated real-time colonoscopy quality feedback system demonstrated strong agreement with expert endoscopist assessments.
The software-based system shows potential as an objective tool for real-time quality assessment in colonoscopy.
Further validation studies are required to confirm the efficacy and generalizability of this automated approach.