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Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Serum Laboratory Studies, Stool Test, Breath Test01:30

Serum Laboratory Studies, Stool Test, Breath Test

Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...
Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

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.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
Assessment of Respiration01:23

Assessment of Respiration

The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...
Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration can...
Blood Studies I: ABG and VBG01:26

Blood Studies I: ABG and VBG

Blood studies are critical in the medical field, enabling healthcare professionals to assess a patient's health status accurately. This page will focus on two significant blood studies: Arterial Blood Gas (ABG) and Venous Blood Gas (VBG).
Arterial Blood Gas (ABG)
Arterial Blood Gas (ABG) studies are crucial for assessing the lungs' ability to supply oxygen and remove carbon dioxide, reflecting the patient's ventilation status. They also help understand the kidneys' capacity to reabsorb or...

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Related Experiment Video

Updated: Jun 22, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

Fast and Accurate Exhaled Breath Ammonia Measurement

Published on: June 11, 2014

Methods and functions: Breath tests.

Barbara Braden1

  • 1John Radcliffe Hospital, Headley Way, OX3 9DU Oxford, UK. braden@em.uni-frankfurt.de

Best Practice & Research. Clinical Gastroenterology
|June 10, 2009
PubMed
Summary
This summary is machine-generated.

Non-radioactive hydrogen and (13)C-breath tests are safe, non-invasive tools for diagnosing gastrointestinal disorders and assessing organ function. Understanding potential pitfalls is crucial for accurate interpretation of breath test results.

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Last Updated: Jun 22, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

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Published on: June 11, 2014

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06:09

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Published on: February 14, 2019

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08:34

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Area of Science:

  • Medical Diagnostics
  • Biochemistry
  • Physiology

Background:

  • Breath tests offer a non-invasive in vivo method for assessing enzyme activities and organ functions.
  • Both hydrogen and (13)C-breath tests are safe, non-radioactive diagnostic strategies suitable for all age groups, including children and pregnant women.

Purpose of the Study:

  • To highlight the diagnostic value of hydrogen and (13)C-breath tests.
  • To outline the applications of these tests in evaluating gastrointestinal disorders and organ functions.
  • To emphasize the importance of understanding influencing factors for accurate interpretation.

Main Methods:

  • Utilizing hydrogen breath tests for diagnosing carbohydrate malassimilation, small intestinal bacterial overgrowth, and measuring orocecal transit time.
  • Employing (13)C-breath tests to monitor the metabolism of (13)C-labeled substrates for assessing Helicobacter pylori infection, gastric emptying, liver, and pancreatic function.
  • Discussing the principles of both hydrogen and (13)C-breath tests.

Main Results:

  • Hydrogen breath tests are established for gastrointestinal diagnostics.
  • (13)C-breath tests enable non-invasive monitoring of metabolic processes and organ functions.
  • These tests provide valuable data for a range of clinical assessments.

Conclusions:

  • Breath tests, including hydrogen and (13)C-based methods, are versatile and safe non-invasive diagnostic tools.
  • Their applications span gastrointestinal health, metabolic function, and organ assessments.
  • Awareness of potential pitfalls and influencing factors is essential for reliable clinical conclusions.