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Related Concept Videos

Hypoxia01:23

Hypoxia

Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
General Anesthesia: Overview01:24

General Anesthesia: Overview

Anesthesia is a medical procedure that uses drugs for CNS suppression to enable painless surgeries and procedures. The selection of anesthetics is influenced by their pharmacokinetic properties, side effects, and patient characteristics. Various types of anesthesia include general, local, regional, spinal, and inhalational.
General anesthesia induces unconsciousness in the whole body, while the others target specific areas or sensations. It is administered to minimize adverse effects, maintain...
Stages of General Anesthesia01:22

Stages of General Anesthesia

Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...
Respiratory Assessment: Purpose and Indications01:19

Respiratory Assessment: Purpose and Indications

Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...

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Related Experiment Video

Updated: May 22, 2026

Continuous Video Electroencephalogram during Hypoxia-Ischemia in Neonatal Mice
09:29

Continuous Video Electroencephalogram during Hypoxia-Ischemia in Neonatal Mice

Published on: June 11, 2020

[Hypoxemia after general anesthesia].

H Aust1, L H J Eberhart, P Kranke

  • 1Klinik für Anästhesie und Intensivtherapie, Universitätsklinikum Gießen und Marburg GmbH, Standort Marburg, Baldingerstrasse, Marburg, Deutschland. aust@staff.uni-marburg.de

Der Anaesthesist
|April 25, 2012
PubMed
Summary
This summary is machine-generated.

Despite advances in anesthesia, many patients experience hypoxemia (low oxygen saturation) after general anesthesia (GA). Patient-related factors significantly increase this risk, making transport from the operating room to the post-anesthesia care unit without pulse oximetry questionable for safety.

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Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation
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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
14:52

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

Area of Science:

  • Anesthesiology
  • Patient Safety
  • Respiratory Monitoring

Background:

  • Pulse oximetry (PO) use is standard during general anesthesia (GA) and in post-anesthesia care units (PACU).
  • However, monitoring of peripheral oxygen saturation (SpO2) during transport from the operating room (OR) to the PACU after GA is not standard practice.
  • Previous studies showed high incidence of hypoxemia in this period.

Purpose of the Study:

  • To determine the incidence of hypoxemia in patients immediately after GA during OR to PACU transfer.
  • To assess the reliability of clinical criteria in detecting hypoxemia.
  • To identify risk factors for hypoxemia and current practices regarding PO and oxygen use during transport.

Main Methods:

  • A prospective observational study of 970 patients undergoing elective surgery under GA.
  • SpO2 was measured upon OR to PACU transfer, after anesthetist's clinical estimation.
  • Multivariate analysis identified factors associated with hypoxemia; a survey assessed hospital practices.

Main Results:

  • 17% of patients had SpO2 <90%, and 6.6% had SpO2 <85%.
  • Hypoxemia was clinically unrecognized in 82% of cases.
  • Patient-related factors (BMI, age, ASA status) and anesthetic choices (opioids, relaxants, nitrous oxide) influenced SpO2 levels. 80% of hospitals did not use PO or supplemental oxygen during transport.

Conclusions:

  • While shorter-acting anesthetic agents may help, patient-related factors are primary drivers of hypoxemia.
  • Predicting hypoxemia based on risk factors remains unreliable.
  • Transporting patients post-GA without PO or supplemental oxygen raises patient safety concerns.