Which statement best describes the secondary injury model?

Which statement best describes the secondary injury model?

• A. It encompasses hypoxia, inadequate fuel delivery, and inadequate waste removal
• B. It describes chronic inflammation only
• C. It refers to bone remodeling after fracture
• D. It describes normal healing process

Answer: (A)

The idea being tested is how secondary injury after an initial insult unfolds as a harmful cascade. After the primary injury, the body can suffer further damage from processes like reduced oxygen delivery, energy supply, and waste removal that worsen cell function. This option best fits because it points to these core contributors: hypoxia (less oxygen reaching tissue), inadequate fuel delivery (insufficient substrates and energy production for cells), and inadequate waste removal (accumulation of metabolites and edema that impair function). Together, they drive continued injury beyond the initial event. Chronic inflammation alone isn’t the whole story but part of the cascade, while bone remodeling after fracture and the notion of a normal healing process don’t describe the secondary injury mechanism.

The idea being tested is how secondary injury after an initial insult unfolds as a harmful cascade. After the primary injury, the body can suffer further damage from processes like reduced oxygen delivery, energy supply, and waste removal that worsen cell function.

This option best fits because it points to these core contributors: hypoxia (less oxygen reaching tissue), inadequate fuel delivery (insufficient substrates and energy production for cells), and inadequate waste removal (accumulation of metabolites and edema that impair function). Together, they drive continued injury beyond the initial event.

Chronic inflammation alone isn’t the whole story but part of the cascade, while bone remodeling after fracture and the notion of a normal healing process don’t describe the secondary injury mechanism.