- What is a blast injury?
- What is the shockwave of an explosion?
- What does an explosion do to the human body?
- What is a blast concussion?
- Which of the following is an example of a primary blast injury?
- How do bombs work?
- How bomb blasts cause damage?
- What are the different levels of injury associated with a blast explosion injury?
- What PSI is lethal?
- At what psi of blast pressure from an explosion does lung collapse or damage occur?
- Can the human body explode?
- Do explosions throw you?
- At what pounds per square inch of blast pressure from an explosion does lung collapse or damage occur?
- How do Explosions work?
What is a blast injury?
Blast injuries result from explosions that have the capability to cause multisystem, life-threatening injuries in single or multiple victims simultaneously.
These types of events present complex triage, diagnostic, and management challenges for the health care provider..
What is the shockwave of an explosion?
In fluid dynamics, a blast wave is the increased pressure and flow resulting from the deposition of a large amount of energy in a small, very localised volume. … In simpler terms, a blast wave is an area of pressure expanding supersonically outward from an explosive core. It has a leading shock front of compressed gases.
What does an explosion do to the human body?
The main direct, primary effect to humans from an explosion is the sudden increase in pressure that occurs as a blast wave passes. It can cause injury to pressure- sensitive human organs, such as ears and lungs.
What is a blast concussion?
But the most common cause of concussion/mTBI among service members who deployed to Iraq and Afghanistan is a blast from an improvised explosive device (IED). A blast can result in a TBI even when the head does not collide with an object. Blast can affect the entire body, injuring limbs, eyes, and ears, for example.
Which of the following is an example of a primary blast injury?
Injuries caused by these pressure or blast waves are described as primary, secondary, tertiary, and quaternary. Primary blast injury occurs when the blast wave hits the body. … For example, being thrown by the blast might cause the head to strike the ground or a wall.
How do bombs work?
Nuclear fission produces the atomic bomb, a weapon of mass destruction that uses power released by the splitting of atomic nuclei. When a single free neutron strikes the nucleus of an atom of radioactive material like uranium or plutonium, it knocks two or three more neutrons free.
How bomb blasts cause damage?
Since only high order explosives create a blast wave, primary blast injuries are unique to high order explosions. The blast wave causes damage to more extensively to air-filled organs. The resulting barotrauma can affect the lungs, auditory organs, the eye, brain, and gastrointestinal tract.
What are the different levels of injury associated with a blast explosion injury?
The four basic mechanisms of blast injury are termed as primary, secondary, tertiary, and quaternary (Table 1).
What PSI is lethal?
The threshold value for lung damage is 12 psi and fatal effect is 40 psi (Glover, 2002). At a pressure of about 35 kilopascals (5 psi), the human eardrum may rupture. With an overpressure of 100 kPa (14 PSI) almost all eardrums will be ruptured.
At what psi of blast pressure from an explosion does lung collapse or damage occur?
Pulmonary damage occurs in 50% of victims exposed to 500 kPa (72.5 psi), whereas intestinal perforation occurs with much higher pressures. Exposure to pressure levels greater than 550 kPa (79.8 psi) is lethal in more than 50% of cases (Figure 7-2 and Figure 7-3). terrorist bombings: how can we cope?
Can the human body explode?
So if there’s air left in your lungs, they will rupture. Oxygen in the rest of your body will also expand. You’ll balloon up to twice your normal size, but you won’t explode. … Without air in your lungs, blood will stop sending oxygen to your brain.
Do explosions throw you?
Tertiary injuries Displacement of air by the explosion creates a blast wind that can throw victims against solid objects. Injuries resulting from this type of traumatic impact are referred to as tertiary blast injuries.
At what pounds per square inch of blast pressure from an explosion does lung collapse or damage occur?
Overpressure can cause eardrum rupture at a threshold of 5 psi and severe lung injury at 20 to 30 psi.
How do Explosions work?
How Explosions Happen. An explosion occurs when a large amount of energy is released into a small volume of area in a very short time. … Burning very rapidly, explosive material releases concentrated gas that expands quickly to fill the surrounding air space and apply pressure to everything in it.