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Related Concept Videos

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 Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
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...
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without causing...
Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important. 
Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...

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Related Experiment Video

Updated: Jul 19, 2026

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
07:52

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department

Published on: January 29, 2011

Capnometry in the spontaneously breathing patient.

Venkatesh Srinivasa1, Bhavani Shankar Kodali

  • 1Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.

Current Opinion in Anaesthesiology
|October 13, 2006
PubMed
Summary

Capnography monitoring, alongside pulse oximetry, enhances patient safety during anesthesia and sedation. This review highlights its expanding role beyond the operating room for diagnosis and metabolic monitoring.

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Area of Science:

  • Anesthesiology
  • Respiratory Medicine
  • Critical Care

Background:

  • Capnography has been a staple in operating rooms for over a decade, significantly reducing anesthesia-related complications.
  • Traditionally used for endotracheal tube confirmation, its applications are expanding.

Purpose of the Study:

  • To review the current literature on the use of capnography in spontaneously breathing patients.
  • To explore the expanding applications of capnography beyond traditional anesthesiology.

Main Methods:

  • Literature review of studies on capnography use.
  • Analysis of capnography's role in various clinical settings and patient populations.

Main Results:

  • Capnography use in non-operating room settings provides additional safety during sedation.
  • Studies support its diagnostic utility for pulmonary embolism and sleep disorders.
  • It serves as a continuous metabolic monitor for pediatric diabetic ketoacidosis and in lung-function labs.

Conclusions:

  • Capnography is increasingly recognized as a vital monitoring tool in anesthesiology and other specialties.
  • Its adoption by non-anesthesiologists is growing.
  • The authors recommend capnography for all sedation cases, both within and outside the operating room.