Quantcast Stages of Inflammation - Oral and Maxillofacial Pathology

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
1-3.
STAGES OF INFLAMMATION
Inflammation is a body defense mechanism that occurs regardless of the source
of injury. The inflammatory response is progressive, in stages; however, it should be
realized that various stages may exist within an injured area at the same time. The
major stages in the inflammatory process are vascular change, exudation, and repair.
The initial inflammatory response is vascular tissue injury resulting in the following
sequence of events.
a. Hyperemia. The presence of an abnormally large blood supply in which the
blood vessels are dilated and the flow of blood is slower.
b. Permeability. Increased permeability in the smaller blood vessels, allowing
the body to position blood elements in the area in order to heal the injured tissue or
combat any introduced foreign agents.
c. Exudation. The movement of fluid and blood cellular elements (exudates)
into the injured tissue(s).
d. Edema. Accumulation of fluids within the tissue(s) that then slows or
stagnates blood flow. This acts to localize the inflammatory process.
1-4.
MAJOR SIGNS AND SYMPTOMS OF INFLAMMATION
The four major signs and symptoms of inflammation are swelling, pain, heat, and
redness. Sometimes a fifth sign is disturbance of function. Swelling is the visual sign of
the accumulation of inflammatory substances (exudates) in the tissues and the
increased amount of blood in the area. The pressure of the exudates (and perhaps the
action of toxins, enzymes, and acids released from injured cells or liberated by
defensive cellular elements) on the nerve endings causes pain. The redness and heat
that accompany inflammation are because of the increased amount of blood in the area.
Inflammatory involvement of the tissue may result in disturbance of function.
1-5.
BENEFICIAL EFFECTS OF INFLAMMATION
The beneficial effects of inflammation are essentially fourfold. First, the
increased fluid dilutes the irritants present in the area (e.g., bacteria and their poisonous
products). Second, the blood cells engulf and often digest bacteria, dead cells, or other
debris that might cause or continue the inflammation. Third, antibodies, which are also
present in the edema fluid, neutralize toxic substances. Fourth, clotting of the edema
fluid walls off the area and prevents the irritant and the inflammation or the inflammatory
process from spreading beyond the affected site.
MD0511
1-3



Medical News
New tuberculosis blood test in children is reliable and highly specific
A new blood test provides a fast and accurate tool...
medicalxpress.com
Invisible blood in urine may indicate bladder cancer
New research which finds that invisible blood in urine may...
medicalxpress.com
The Week Ahead: ESC, ICAAC, ERS, and FDA on Sunscreen
(MedPage Today) -- It's a big week for meetings: MedPage...
medpagetoday.com
Colombian president: No link of vaccine to illness
Colombia's president is dismissing suggestions that a vaccine against cervical...
medicalxpress.com
Health workers death toll mounts in W.Africa as Ebola spreads
Nigeria on Sunday confirmed a fresh case of Ebola in...
medicalxpress.com
Estrogen May Be Key to Anti-Binge Tx (CME/CE)
(MedPage Today) -- Researchers have identified a receptor that mediates...
medpagetoday.com
Gene clues to glaucoma risk
Scientists on Sunday said they had identified six genetic variants...
medicalxpress.com
Memory in silent neurons
According to a generally-accepted model of synaptic plasticity, a neuron...
medicalxpress.com
Memory and Alzheimer's: Towards a better comprehension of the dynamic mechanisms
A study just published in the prestigious Nature Neuroscience journal...
medicalxpress.com
A new way to diagnose malaria, using magnetic fields
Over the past several decades, malaria diagnosis has changed very...
medicalxpress.com
ESC: Evidence Mounts for Injection to Lower LDL-C (CME/CE)
BARCELONA (MedPage Today) -- Four studies testing the injectable novel...
medpagetoday.com
Facts, Myths, and the Stool DNA Test
(MedPage Today) -- Publicity surrounding the FDA's approval of a...
medpagetoday.com
ESC: Nerve Stimulation No Help in Heart Failure (CME/CE)
BARCELONA (MedPage Today) -- Stimulating the vagus nerve didn't improve...
medpagetoday.com
ESC: Quadripolar Tops Bipolar in Cardiac Pacing (CME/CE)
BARCELONA (MedPage Today) -- Quadripolar left ventricle lead technology dramatically...
medpagetoday.com
ESC: Ivabradine Flops in CAD Trial (CME/CE)
BARCELONA (MedPage Today) -- Ivabradine, a novel heart-rate reducing agent,...
medpagetoday.com
Japan porn queens raise thousands of dollars from 'Boob Aid'
A group of Japanese porn actresses raised tens of thousands...
medicalxpress.com
HHS Mulls Lifting Gay Blood Donor Ban
WASHINGTON (MedPage Today) -- The Department of Health and Human...
medpagetoday.com
WHO: Senegal Ebola case 'a top priority emergency'
The World Health Organization says it is treating Senegal's first...
medicalxpress.com
ALS Ice Bucket Challenge arrives in North Korea
It's pretty hard to find a novel way to do...
medicalxpress.com
Renal denervation reduces recurrent AF after ablation
Renal denervation reduces recurrent atrial fibrillation (AF) when performed with...
medicalxpress.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +