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Related Concept Videos

Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

616
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...
616
Pulse Oximetry01:24

Pulse Oximetry

362
Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
362
Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

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Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
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Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

176
Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
176
Respiratory Assessment: Purpose and Indications01:19

Respiratory Assessment: Purpose and Indications

1.1K
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...
1.1K
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

272
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:
272

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Related Experiment Video

Updated: Jul 19, 2025

How to Administer Near-Infrared Spectroscopy in Critically ill Neonates, Infants, and Children
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How to Administer Near-Infrared Spectroscopy in Critically ill Neonates, Infants, and Children

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Early warning for SpO2 decrease by the oxygen reserve index in neonates and small infants.

Eva Wittenmeier1, Irene Schmidtmann2, Pascal Heese1

  • 1Department of Anesthesiology, University Medical Centre of the Johannes Gutenberg University, Mainz, Germany.

Paediatric Anaesthesia
|August 8, 2023
PubMed
Summary
This summary is machine-generated.

The Oxygen Reserve Index (ORI) offered some early warning for oxygen desaturation in infants but lacked sufficient sensitivity and agreement with PaO2. Therefore, ORI is not recommended as a reliable early warning indicator for this pediatric population.

Keywords:
anesthesiahypoxiainfantsoximetrysafety

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Area of Science:

  • Anesthesiology
  • Pediatric Critical Care
  • Biomedical Engineering

Background:

  • Continuous monitoring of patient oxygenation is crucial for safe anesthesia, particularly in neonates and infants.
  • The Oxygen Reserve Index (ORI) is a novel parameter designed to assess oxygenation by relating to arterial oxygen partial pressure (PaO2).
  • Early detection of hypoxemia is vital to prevent adverse events during pediatric anesthesia.

Purpose of the Study:

  • To evaluate the clinical relevance and warning time provided by the ORI for impending SpO2 (pulse oximetry hemoglobin saturation) reductions in neonates and small infants.
  • To assess the sensitivity of ORI alarms in detecting decreases in SpO2 during general anesthesia in infants.
  • To determine the agreement between ORI and PaO2 measurements with blood gas analyses in this pediatric cohort.

Main Methods:

  • Continuous measurement of ORI and SpO2 in infants under 2 years old during general anesthesia.
  • Calculation of warning time and sensitivity for different ORI alarm settings to detect SpO2 decrease.
  • Assessment of ORI and PaO2 agreement with blood gas analysis results.

Main Results:

  • The ORI provided a median warning time of 84 seconds for SpO2 decrease during anesthesia, with a sensitivity of 55%.
  • During anesthesia induction, the warning time was 63 seconds with 56% sensitivity.
  • The agreement between ORI and PaO2 intervals was poor (kappa = 0.00), and infant weight and height correlated with correct PaO2 classification by ORI.

Conclusions:

  • While the ORI offered an early warning for SpO2 decrease in neonates and small infants, its sensitivity and agreement with PaO2 were insufficient for clinical recommendation.
  • The study suggests that the ORI, in its current form, may not be a reliable early warning indicator for detecting hypoxemia in this vulnerable age group.
  • Further research may be needed to refine ORI algorithms or explore its utility in conjunction with other monitoring parameters for pediatric anesthesia.