Which statement is true regarding shock progression?

• A. The pulse may become thready as perfusion worsens
• B. Breathing rate never changes
• C. Blood pressure rises early and stays high
• D. Hemostatic agents are used to treat shock

Answer: (A)

Shock progression hinges on how perfusion to tissues declines despite the body's attempts to compensate. In the early, compensated stage, the body ramps up sympathetic activity, causing faster heart rate and vasoconstriction to keep blood flowing to vital organs. As perfusion worsens and the heart and vessels can no longer sustain output, the force behind each heartbeat drops and the distal pulses grow weak and difficult to feel—becoming thready. This change signals that the patient is moving toward decompensation and needs rapid assessment and intervention.

Breathing rate typically increases in shock to help with oxygen delivery and to compensate for metabolic acidosis, so saying it never changes isn’t accurate. Blood pressure also doesn’t rise and stay high; it often stays normal early or may later fall as shock progresses. Hemostatic agents are about stopping bleeding, not directly treating the progression of shock itself, even though controlling hemorrhage is crucial in bleeding-related shock.

So the pulse becoming thready as perfusion worsens best describes the progression pattern you’d expect in shock.