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Related Concept Videos

Intestinal Obstruction II: Pathophysiology01:07

Intestinal Obstruction II: Pathophysiology

Intestinal obstruction triggers a series of physiological responses, starting with gas and fluid accumulation in the bowel segment proximal to the obstruction, leading to distension. This distended intestine compresses the diaphragm, hindering lung expansion and potentially leading to reduced respiratory effort, atelectasis, and pneumonia.To overcome the blockage, the gut intensifies contractions, causing colicky abdominal pain, nausea, and vomiting, which reduces fluid and food intake and...
Pyloric Obstruction01:11

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Intestinal Obstruction I: Introduction01:29

Intestinal Obstruction I: Introduction

Intestinal obstruction is a partial or complete blockage of the small or large intestine that disrupts the normal flow of intestinal contents through the lumen. This interruption impairs digestion, absorption, and fluid balance, and may lead to serious complications if not treated promptly.Mechanical ObstructionMechanical obstruction occurs when a physical blockage prevents intestinal contents from passing, arising from within the lumen or the bowel wall, or from external compression.Adhesions,...
Pulmonary Embolism I: Introduction01:29

Pulmonary Embolism I: Introduction

Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...

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Related Experiment Video

Updated: Jun 20, 2026

Postoperative Ileus Murine Model
04:26

Postoperative Ileus Murine Model

Published on: July 12, 2024

Sewage Suffocation: A Case Report on Poop Pit Plop Pathophysiology.

Alexandra Fields1, Christopher A Mitchell1, Alexander Barbuto2

  • 1Carl R. Darnall Army Medical Center, Fort Hood, Killeen, TX.

Journal of Special Operations Medicine : a Peer Reviewed Journal for SOF Medical Professionals
|June 18, 2026
PubMed
Summary
This summary is machine-generated.

Exposure to sewage pits poses toxicologic risks beyond microbes. A case report details a patient experiencing altered consciousness and seizures after falling into a sewage pit, highlighting the need for environmental hazard training.

Keywords:
cyanideenvironmental CBRNEenvironmental hazardshydrogen sulfidehypoxiamethanesewage toxicology

Related Experiment Videos

Last Updated: Jun 20, 2026

Postoperative Ileus Murine Model
04:26

Postoperative Ileus Murine Model

Published on: July 12, 2024

Area of Science:

  • Toxicology
  • Environmental Health
  • Emergency Medicine

Background:

  • Poorly maintained sanitation infrastructure presents significant toxicologic risks.
  • Sewage pits can release dangerous gases, posing health hazards.
  • Environmental toxins in austere settings are an underappreciated threat.

Purpose of the Study:

  • To report a case of acute toxicity following submersion in a sewage pit.
  • To explore the potential pathophysiology of sewage-gas-induced illness.
  • To emphasize the importance of CBRNE training in hazardous environments.

Main Methods:

  • Case report detailing a patient's presentation and medical stabilization.
  • Review of potential toxic agents found in sewage, including methane, hydrogen sulfide, and cyanide.
  • Discussion of operational implications in austere settings.

Main Results:

  • A young adult developed altered consciousness, emesis, and seizures after falling into a sewage pit.
  • Potential toxicologic mechanisms involving common sewage gases were investigated.
  • The case underscores the risks associated with environmental hazards in underdeveloped areas.

Conclusions:

  • Exposure to sewage pits can cause severe acute toxicologic effects.
  • Understanding sewage-derived toxins is crucial for medical management in affected regions.
  • Enhanced Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) preparedness is vital for personnel operating in austere environments.