Examkin

Question

Difficulty: MediumPhysiological Adaptation

A client admitted with urosepsis has the following clinical parameters documented over a four-hour period:

Parameter06:00 AM10:00 AM
Temperature37.4°C (99.3°F)38.8°C (101.8°F)
Blood Pressure122/78 mm Hg108/52 mm Hg
Heart Rate82 beats/min116 beats/min
Respiratory Rate16 breaths/min28 breaths/min

What is the most accurate interpretation of these clinical findings?

  1. A
    Progressive hypovolemic shock, evidenced by the decrease in diastolic blood pressure
  2. B
    Respiratory acidosis, resulting from the significant increase in respiratory rate
  3. Early hyperdynamic septic shock, indicated by tachycardia and a widened pulse pressureAnswer
  4. D
    Hemodynamic stability, demonstrated by a systolic blood pressure greater than 100 mm Hg

Answer

The client is exhibiting signs of early hyperdynamic septic shock, characterized by a widened pulse pressure and tachycardia.
In the early, hyperdynamic ('warm') stage of septic shock, systemic inflammatory mediators trigger massive vasodilation. This causes a precipitous drop in systemic vascular resistance, which lowers the diastolic blood pressure more significantly than the systolic pressure, resulting in a widened pulse pressure. This physiological adaptation occurs concurrently with compensatory tachycardia and fever.

Step-by-Step Solution

1
Analyze the blood pressure trend to calculate the pulse pressure.
The pulse pressure at 06:00 AM was 44 mm Hg (122 - 78). At 10:00 AM, the pulse pressure widened to 56 mm Hg (108 - 52).
Pulse pressure trends help distinguish the underlying physiological mechanism of shock (vasodilation vs. vasoconstriction).
2
Evaluate the respiratory rate change in the context of acid-base balance.
The rate increased significantly to 28 breaths/min, which causes excess carbon dioxide elimination.
Tachypnea typically leads to respiratory alkalosis, definitively ruling out respiratory acidosis as an interpretation.
3
Synthesize all clinical data to identify the current hemodynamic status.
The combination of fever, tachycardia, tachypnea, and a widening pulse pressure points to massive systemic vasodilation.
These findings are the classic hallmark signs of the early (warm) hyperdynamic phase of septic shock.

Key Concept

Early Signs of Septic Shock (Hyperdynamic Phase)
Estimated Time:1m 30s
Rate this question

Topics

Physiological Adaptation

More questions from this topic