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Chapter 4: Environmental Injury

Which of the following is not typical of a skin laceration?

A. The edges are irregular.

B. They are more common over underlying bone.

C. There is abrasion of the margins.

D. They are always caused by sharp/cutting instruments.

E. There may be deeper underlying internal injury.

Answer: D

Explanation: The term “laceration” is often used indiscriminately for injuries caused by both blunt and sharp force interactions, but it should only be used to describe injuries caused by shearing, tearing, and crushing forces, that is, blunt trauma. Wounds caused by cutting instruments should be described as cuts or incised wounds. Lacerations of the skin typically have irregular, abraded edges and are often found in skin where there is underlying bone. They may signal the presence of internal injuries from the force of the impact that broke the skin.

Which of the following factors has not been a feature of our current “opioid epidemic?”

A. A change in the accepted practice of prescribing pain medications

B. An increase in the prescribing of narcotic medications

C. The unethical and illegal participation of some physicians in prescribing narcotic medications

D. The adulteration of street drugs like heroin and cocaine with potent synthetic opioids like fentanyl

E. Clandestine farming of opium poppies under grow-lights in parts of the United States

Answer: E

Explanation: Marijuana has been clandestinely and now “legally,” in some states, grown around the United States, but there is no significant cultivation of opium poppies. The other factors have all played a role in the current staggering rise in drug-related deaths with perhaps the most significant one being the addition of fentanyl and its analogs to drugs sold on the street.

Burns may be characterized as being first, second, or third degree. Another classification is partial and full thickness. Which of the following statements is untrue?

A. First degree is partial thickness.

B. Third degree is full thickness.

C. Second degree is full thickness.

D. Second degree is partial thickness.

Answer: C

Explanation: In second-degree burns, islands of intact epidermis survive in the deep dermal appendages, hair follicles, and glands. Thus, the ...

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