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Related Concept Videos

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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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.
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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
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Endoscopic Studies I: Bronchoscopy and Thoracoscopy01:30

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Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
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Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
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Related Experiment Video

Updated: May 6, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
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Carbon dioxide insufflation during colonoscopy: a randomised controlled trial.

Anne Cleland1, Jenny Carryer, Steve La Grow

  • 1Gastroenterology Department, MidCentral Health, Private Bag, Palmerston North, New Zealand. Anne.cleland@midcentraldhb.govt.nz.

The New Zealand Medical Journal
|October 25, 2013
PubMed
Summary
This summary is machine-generated.

Carbon dioxide (CO₂) insufflation during colonoscopy significantly reduces post-procedure pain compared to air. Patients receiving CO₂ reported less pain and a higher incidence of zero pain post-colonoscopy.

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Area of Science:

  • Gastroenterology
  • Medical Devices
  • Pain Management

Background:

  • Colonoscopy is a common procedure for diagnosing and treating gastrointestinal conditions.
  • Patient discomfort and pain post-colonoscopy are frequently reported, often related to gas insufflation.
  • Air insufflation is standard, but alternative gases may improve patient experience.

Purpose of the Study:

  • To compare the efficacy of carbon dioxide (CO₂) versus air insufflation in reducing post-colonoscopy pain.
  • To evaluate patient-reported pain levels using a numeric rating scale at multiple time points.

Main Methods:

  • A randomized, double-blinded, controlled trial involving 205 patients undergoing elective colonoscopy.
  • Patients were randomized to receive colonic insufflation with either air or CO₂.
  • Pain scores and the proportion of patients reporting zero pain were assessed intra-procedure and at 10, 30, and 60 minutes post-procedure.

Main Results:

  • No significant difference in pain scores was observed intra-procedure between CO₂ and air groups.
  • Patients receiving CO₂ insufflation reported significantly lower mean pain scores post-procedure (p<0.001).
  • A significantly greater proportion of patients in the CO₂ group reported zero pain post-procedure (p<0.001).

Conclusions:

  • Carbon dioxide insufflation during colonoscopy leads to reduced post-procedure pain compared to air.
  • CO₂ is a superior insufflating gas for enhancing patient comfort after colonoscopy.
  • Consideration of CO₂ as the standard insufflating gas during colonoscopy is recommended.