CHAPTER 4: THE PHYSICS OF TRAUMA PHTLS EXAM

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CHAPTER 4: THE PHYSICS OF TRAUMA (PHTLS) EXAM

QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -35 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Dynamic pressure

Answer:

The component of an explosion that is directional and felt as a blast wind

Question 2: Stipple

Answer:

Multiple small dots resulting from gunpowder from point-blank gunshot wounds

Question 3: Stopping distance

Answer:

The distance over which a moving object comes to a stop; a measure of how quickly energy is dissipated or transferred

Question 4: Newton's first law of motion

Answer:

A body at rest will remain at rest and a moody in motion will remain in motion unless acted on by an outside force

Question 5: Contact wounds

Answer:

He type of wounds that occurs when the muzzle of a gun touches the patient at the time of discharge, resulting in a circular entrance wound, often associated with visible buns, soot, or the imprint of the muzzle.

Question 6: Solid density

Answer:

Tissue density consistent with bone

Question 7: Choke

Answer:

A constriction in the barrel of a shotgun to decrease the amount of pellet spread after firing.

Question 8: Blast wind

Answer:

The result of the sudden displacement of air from an explosion

Question 9: Cavitation

Answer:

The act of forcing tissues of the body out of their normal position; to cause a temporary or permanent cavity (e.g., when the body is struck by a bullet, the the acceleration of particles of tissue away from the missile produces an area of injury in which a large temporary cavity occurs).

Question 10: Compressibility

Answer:

The ability to be deformed by the transfer of energy.

Question 11: Law of conservation of energy

Answer:

A law of physics stating that energy cannot be created or destroyed by only changed in form

Question 12: Shear

Answer:

Change-of-speed force resulting in a cutting or tearing of body parts.

Question 13: Intermediate-range wounds

Answer:

A penetrating gunshot wound that occurs at a distance of approximately 6 to 18 feet (1.8 to 5.5 meters)

Question 14: Blunt trauma

Answer:

Non-penetrating trauma cause by a rapidly moving object that impacts the body.

Question 15: Diverter

Answer:

A device on a shotgun to spread the pellets into a wider, horizontal path when fired.

Question 16: Penetrating trauma

Answer:

Trauma that results when an object penetrates the skin and injures underlying structures. Generally produced both permanent and temporary cavities

Question 17: Stellate (starburst) wound

Answer:

A star-shaped wound

Question 18: Blast overpressure

Answer:

Pressure exceeding normal atmospheric pressure that results from a high-order explosive detonation

Question 19: Fragmentation

Answer:

The breaking up of an object to produce multiple parts or shrapnel.

Question 20: Kinetic energy (KE)

Answer:

Energy available from movement. Function of the weight of an item and its speed: KE = 1/2 of the mass x the velocity squared.

Question 21: Blast wave

Answer:

A sharply-defined wave front of increased pressure that results from a high-order. Explosive detonation

Question 22: Rifling

Answer:

Grooves on the inside of the barrel that spin a single missile (bullet) in the stable flight pattern towards the target.

Question 23: Air density

Answer:

As used in the text, the property of organs having approximately the same weight and density as air; e.g., lung tissue

Question 24: Compression

Answer:

The type of force involved in impacts resulting in a tissue, organ, or other body part being squeezed between two or more object or body parts.

Question 25: Water density

Answer:

Organs that have a tissue density similar to that of water; e.g., liver, spleen, muscle

Question 26: Newton's second law of motion

Answer:

A fundamental law of physics stating that the acceleration of an object is directly proportional to the magnitude of the force applied, in the same direction as the force applied, and inversely proportional to the mass of the object

Question 27: Long-range wounds

Answer:

A penetrating gunshot wound that occurs at a distance greater than 18 feet (5.5 meters)