Which finding indicates that rehydration is complete and hypovolemic shock has been successfully treated in a patient?
1. CVP = 8 mm Hg
2. MAP = 45 mm Hg
3. Urinary output of 0.1 mL/kg/hr
4. Hct = 54%
1
Rationale 1: A CVP reading of 8 mm Hg is within normal range and rehydration has been restored.
Rationale 2: The mean arterial pressure (MAP) should be between 60 to 70 mm Hg as evidence of positive fluid resuscitation efforts.
Rationale 3: Urinary output to reflect adequate rehydration begins at 0.5 to 1 mL/kg/hr. Therefore, 0.1 mL is too small and renal insufficiency may be present due to inadequate circulating blood volume.
Rationale 4: Hematocrit (Hct) is the percentage of the number of RBCs per fluid volume. The normal range is 35% to 45% for an adult. The higher percentage represents a decreased fluid-to-cell ratio, which implies a fluid deficit and rehydration is not complete. An Hct of 54% is critical and increases the risk of clots, strokes, and other vessel obstruction from potential hemolysis and sluggishness of cellular movements.
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