A 10-year-old patient is in hypovolemic shock.

Children compensate for shock through increased heart rate, respiratory rate, and vasoconstriction, which delays blood pressure drop. Therefore:

Tachycardia is often the first sign

Prolonged capillary refill ( > 2 seconds) is an early indicator

Tachypnea supports perfusion

Blood pressure is a late sign in pediatric shock. SpO₂ is helpful but does not specifically indicate shock. Blood glucose may be abnormal in other metabolic conditions but is not an early marker of volume loss.