Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Regulation of Stroke Volume01:27

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers, unexplained...
Endoscopic Studies II: Thoracocentesis01:26

Endoscopic Studies II: Thoracocentesis

Thoracentesis(Thoracocentesis), commonly known as pleural tap, is a medical procedure where a 22 gauge needle is inserted into the pleural space, the area between the lung and chest wall. This procedure is commonly performed to diagnose or treat various respiratory disorders.
Description
Excess pleural fluid or air may accumulate in some respiratory disorders in the thoracic cavity. To treat pleural effusion, a physician conducts thoracentesis by carefully piercing the chest wall and entering...
One-Compartment Open Model for IV Bolus Administration: Estimation of Clearance00:56

One-Compartment Open Model for IV Bolus Administration: Estimation of Clearance

Clearance is a key pharmacokinetic parameter that quantifies the volume of body fluid from which a drug is entirely removed within a specific time frame. It is crucial in assessing how a drug is eliminated from the body and has critical clinical applications.
In the one-compartment open model for intravenous (IV) bolus administration, clearance is estimated by dividing the elimination rate by the plasma drug concentration. This equation leverages the elimination rate constant and the apparent...
Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...

You might also read

Related Articles

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

Sort by
Same author

Introducing a Novel Course-Based Undergraduate Research Experience Using Duckweed as a Model System.

Integrative organismal biology (Oxford, England)·2026
Same author

Epidemiology, Treatment Patterns and Survival in Canadian Patients With Chronic Hepatitis B-Related Hepatocellular Carcinoma.

Journal of viral hepatitis·2024
Same author

[Corneal perforations in patients on tyrosine kinase inhibitors].

Journal francais d'ophtalmologie·2023
Same author

Utility of a machine-guided tool for assessing risk behaviour associated with contracting HIV in three sites in South Africa.

Informatics in medicine unlocked·2023
Same author

Single-cell reconstruction of follicular remodeling in the human adult ovary.

Nature communications·2019
Same author

BRD4 bimodal binding at promoters and drug-induced displacement at Pol II pause sites associates with I-BET sensitivity.

Epigenetics & chromatin·2019
Same journal

Evaluation of funding gastroenterology research in Canada illustrates the beneficial role of partnerships.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
Same journal

Use of fecal occult blood test in hospitalized patients: survey of physicians practicing in a large central Canadian health region and Canadian gastroenterologists.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
Same journal

Treatment of chronic hepatitis C in a Canadian Aboriginal population: results from the PRAIRIE study.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
Same journal

A randomized controlled trial comparing sequential with triple therapy for Helicobacter pylori in an Aboriginal community in the Canadian North.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
Same journal

Improving the quality of colonoscopy bowel preparation using an educational video.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
Same journal

Putting an end to the misuse of the fecal occult blood test in diagnostic medicine.

Canadian journal of gastroenterology = Journal canadien de gastroenterologie·2013
See all related articles

Related Experiment Video

Updated: Jun 21, 2026

The Application of Point-of-Care Ultrasonography (POCUS) in the Management of Acute Respiratory Distress Syndrome (ARDS) in the Intensive Care Unit
08:22

The Application of Point-of-Care Ultrasonography (POCUS) in the Management of Acute Respiratory Distress Syndrome (ARDS) in the Intensive Care Unit

Published on: December 12, 2025

Add-on cases in the endoscopy unit: Factors that affect volume.

B Segal1, E Lam, J Amar

  • 1University of British Columbia, St Paul's Hospital, Vancouver, Canada.

Canadian Journal of Gastroenterology = Journal Canadien De Gastroenterologie
|July 23, 2009
PubMed
Summary
This summary is machine-generated.

Emergency add-on endoscopy cases, particularly esophagastroduodenoscopy (EGD), are more common on Mondays. Fewer emergency add-on procedures occur on Fridays and in September, indicating variability that requires careful resource planning for optimal patient care.

Related Experiment Videos

Last Updated: Jun 21, 2026

The Application of Point-of-Care Ultrasonography (POCUS) in the Management of Acute Respiratory Distress Syndrome (ARDS) in the Intensive Care Unit
08:22

The Application of Point-of-Care Ultrasonography (POCUS) in the Management of Acute Respiratory Distress Syndrome (ARDS) in the Intensive Care Unit

Published on: December 12, 2025

Area of Science:

  • Gastroenterology
  • Health Services Research
  • Endoscopic Procedures

Background:

  • Hospital-based endoscopy clinics commonly manage emergency add-on cases, which are resource-intensive compared to elective procedures.
  • Understanding factors influencing emergency add-on case volume is crucial for efficient clinic operations.

Purpose of the Study:

  • To identify specific factors associated with the high volume of emergency add-on cases in a tertiary care endoscopy unit.
  • To compare the characteristics of add-on emergency endoscopy cases with elective cases.

Main Methods:

  • Retrospective chart review of gastrointestinal endoscopy cases (esophagastroduodenoscopy, colonoscopy, flexible sigmoidoscopy) from September 2006 to May 2007.
  • Analysis included day of the week, month, procedure type, and physician, comparing add-on cases with elective procedures.

Main Results:

  • Add-on cases were more likely to be esophagastroduodenoscopies (EGDs) and less likely to be colonoscopies (Cs) compared to elective cases.
  • Significantly more add-on cases occurred on Mondays and fewer on Fridays.
  • Fewer add-on cases were observed in September compared to other months.

Conclusions:

  • The current system, with weekend emergency cases, leads to higher add-on volumes on Mondays.
  • Esophagastroduodenoscopy (EGD) is more frequent in add-on cases, aligning with upper gastrointestinal bleeding as a common emergency.
  • Variability in add-on case numbers suggests multiple influencing factors, necessitating robust resource planning for patient care.