Class I hypovolemic shock is characterized by which of the following?

Class I hypovolemic shock is characterized by which of the following?

• A. Blood loss 1200 ml; blood volume lost 25%; tachycardia; hypotension; RR 28; urine output 20 ml; mental status anxious
• B. Blood loss 100 ml; volume loss 1%; tachycardia; hypertension; RR 12; urine output 100 ml; mental status calm
• C. Blood loss 750 ml; blood volume lost <15%; pulse normal; BP normal; RR normal (14-20); urine output >30 ml; mental status slightly anxious
• D. Blood loss 500 ml; blood volume lost 5%; tachycardia; normal BP; RR 18; urine output 60 ml; mental status alert

Answer: (C)

Class I hypovolemic shock reflects mild blood loss with preserved perfusion. In this stage, the circulating volume is reduced by about 15% or less (roughly up to 750 mL in a typical adult), but the body’s compensatory mechanisms keep blood pressure and perfusion intact. Vital signs stay near normal, with only mild signs of sympathetic activation such as slight anxiety or a normal-to-mild tachycardia. Urine output remains adequate (usually above 30 mL/hour), and respiration is not markedly increased. The best description here shows about 750 mL lost, which is under 15% of total blood volume, with normal pulse and blood pressure, normal respiratory rate, urine output greater than 30 mL, and only slightly anxious mental status. This aligns with Class I: mild hemorrhage with preserved hemodynamics. Other scenarios depict more advanced stages or non-shock patterns (larger blood losses with hypotension and tachypnea, or small losses with hypertension and calm status), which do not fit Class I characteristics.

Class I hypovolemic shock reflects mild blood loss with preserved perfusion. In this stage, the circulating volume is reduced by about 15% or less (roughly up to 750 mL in a typical adult), but the body’s compensatory mechanisms keep blood pressure and perfusion intact. Vital signs stay near normal, with only mild signs of sympathetic activation such as slight anxiety or a normal-to-mild tachycardia. Urine output remains adequate (usually above 30 mL/hour), and respiration is not markedly increased.

The best description here shows about 750 mL lost, which is under 15% of total blood volume, with normal pulse and blood pressure, normal respiratory rate, urine output greater than 30 mL, and only slightly anxious mental status. This aligns with Class I: mild hemorrhage with preserved hemodynamics.

Other scenarios depict more advanced stages or non-shock patterns (larger blood losses with hypotension and tachypnea, or small losses with hypertension and calm status), which do not fit Class I characteristics.