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Related Concept Videos

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:
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...
Pneumothorax-I01:26

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
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...
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...
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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Mouse Cardiac Arrest Model for Brain Imaging and Brain Physiology Monitoring During Ischemia and Resuscitation
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An unusual accidental death from positional asphyxia.

Fawzi Abdussalam Benomran1, A I Hassan

  • 1Forensic Medicine Department, General Department of Forensic Science, Dubai Police General Headquarters, Dubai, United Arab Emirates. Benemran@hotmail.com

The American Journal of Forensic Medicine and Pathology
|October 13, 2010
PubMed
Summary

A man died from positional asphyxia after sleeping in a knee-chest position. High blood alcohol levels and the body’s position were key factors in this tragic death.

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Area of Science:

  • Forensic Pathology
  • Toxicology

Background:

  • Positional asphyxia occurs when abnormal body positions impede respiration.
  • Diagnosis relies on circumstantial evidence and exclusion of other causes.

Observation:

  • A 37-year-old male was found deceased in a knee-chest position after heavy alcohol consumption.
  • Scene examination and autopsy revealed facial congestion and petechial hemorrhages.

Findings:

  • Autopsy showed no other pathological findings or injuries to explain death.
  • A blood alcohol level of 290 mg/100 mL was recorded.
  • Death was attributed to positional asphyxia secondary to alcohol intoxication.

Implications:

  • Highlights the risk of alcohol intoxication impairing the ability to self-correct dangerous sleeping positions.
  • Underscores the importance of considering positional asphyxia in alcohol-related deaths.
  • Emphasizes the role of scene investigation in diagnosing positional asphyxia.