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Related Concept Videos

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...
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...
Pulmonary Cycle: Exhalation01:17

Pulmonary Cycle: Exhalation

In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
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...
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

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...
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:

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Related Experiment Video

Updated: Jul 3, 2026

A Swine Model of Neonatal Asphyxia
10:36

A Swine Model of Neonatal Asphyxia

Published on: October 11, 2011

[A newborn infant with hyperventilation].

Rolf Lindemann1, Mia C Myhre, Mari Bakken

  • 1Intensivavdelingen for nyfødte, Barneklinikken, Ullevål universitetssykehus, 0407 Oslo. roli@uus.no

Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
|July 9, 2008
PubMed
Summary
This summary is machine-generated.

Respiratory alkalosis in newborns can signal a urea cycle disorder. Early detection and specific treatment are crucial, but even with intervention, outcomes can be poor, highlighting the need for genetic screening.

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A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy
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A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy

Published on: May 16, 2015

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Last Updated: Jul 3, 2026

A Swine Model of Neonatal Asphyxia
10:36

A Swine Model of Neonatal Asphyxia

Published on: October 11, 2011

A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy
10:30

A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy

Published on: May 16, 2015

Area of Science:

  • Biochemistry
  • Genetics
  • Neonatology

Background:

  • Urea cycle disorders (UCDs) are genetic metabolic diseases.
  • Early diagnosis and treatment are critical for infant survival and neurodevelopment.
  • Respiratory alkalosis and hyperammonemia are key indicators of UCDs.

Observation:

  • A neonate presented with respiratory alkalosis and severe hyperammonemia (>700 micromol/L) within 48 hours of birth.
  • The infant did not respond to conventional and specific UCD therapies.
  • Genetic analysis revealed a mutation in the OTC gene (c.67C >T, p.R23X), confirming ornithine transcarbamylase deficiency.

Findings:

  • The patient's condition rapidly deteriorated despite prompt and appropriate medical interventions.
  • The identified OTC gene mutation is a known cause of severe UCD.
  • This case underscores the challenges in managing severe neonatal hyperammonemia.

Implications:

  • Early detection of UCDs through screening is vital for timely intervention.
  • Genetic counseling for families with UCDs is essential for carrier detection and prenatal diagnosis.
  • Further research into novel therapeutic strategies for severe UCDs is warranted.