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Related Concept Videos

Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
Free-falling Bodies: Introduction01:07

Free-falling Bodies: Introduction

All objects, neglecting air resistance, fall with the same acceleration towards the Earth's center due to the force exerted by the Earth's gravity. This experimentally determined fact is unexpected because we are so accustomed to the effects of air resistance and friction that we expect light objects to fall slower than heavier ones. People believed that a heavier object had a greater acceleration when falling until Galileo Galilei (1564–1642) proved otherwise. We now know this is not the case.
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
Free-falling Bodies: Example01:05

Free-falling Bodies: Example

An object falling without any air resistance under the influence of gravitational force is said to be in free-fall. For free-falling bodies, the acceleration due to gravity is constant, irrespective of their mass. Free-fall is experienced not only by objects falling downward, but also by all objects whose motion is influenced by gravitational force alone. The dynamics of free-fall motion can be calculated using kinematic equations of motion, since free-fall acceleration is constant.
The...
Physiological Barriers01:25

Physiological Barriers

Physiological barriers are semi-permeable cellular structures restricting drug diffusion into intracellular compartments and tissues. There are six types of physiological barriers: blood endothelial, cell membrane, blood-brain, blood-cerebrospinal fluid (CSF), blood-placenta, and blood-testis barriers.
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Intralumenal Vesicles and Multivesicular Bodies

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Updated: Jun 19, 2026

Grossing of Non-neoplastic Globes, Including Fetal Eyes
05:15

Grossing of Non-neoplastic Globes, Including Fetal Eyes

Published on: May 30, 2025

[The "invisible" foreign body].

A Knopf1, M Dobritz, C Fauser

  • 1Hals-Nasen-Ohren-Klinik und Poliklinik, Klinikum rechts der Isar der technischen Universität München, 81675 München. andreas.knopf1@gmx.net

HNO
|October 20, 2009
PubMed
Summary
This summary is machine-generated.

A bamboo stem penetrating the throat was initially missed on imaging but later found in an abscess. Surgical removal was successful, highlighting the importance of follow-up imaging for suspected retained foreign bodies.

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Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
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Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

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Last Updated: Jun 19, 2026

Grossing of Non-neoplastic Globes, Including Fetal Eyes
05:15

Grossing of Non-neoplastic Globes, Including Fetal Eyes

Published on: May 30, 2025

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
04:55

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

Area of Science:

  • Trauma Surgery
  • Medical Imaging
  • Otolaryngology

Background:

  • A patient sustained a penetrating neck injury from a bamboo plant stem after a fall.
  • Initial management included wound repair and exploration, with no foreign body detected on initial clinical examination or computed tomography (CT) of the neck.

Observation:

  • The patient presented with persistent odynophagy and a putrid taste one week post-injury.
  • A follow-up CT scan of the neck revealed a previously undetected foreign body within a prevertebral abscess cavity.

Findings:

  • The overlooked bamboo foreign body was surgically removed under general anesthesia.
  • Post-operative recovery was uneventful, with no residual complications.

Implications:

  • This case underscores the potential for delayed diagnosis of retained foreign bodies, even after initial negative imaging.
  • Persistent symptoms following penetrating neck trauma warrant thorough re-evaluation and potentially repeat advanced imaging.
  • Prompt surgical intervention is crucial for managing complications such as abscess formation secondary to retained foreign objects.