A nurse is evaluating a client who was intubated and placed on mechanical ventilation 2 ho… — NCLEX-RN

A nurse is evaluating a client who was intubated and placed on mechanical ventilation $2$ hours ago for acute respiratory failure. Current assessment findings include a heart rate of $132$ bpm, blood pressure of $86/52$ mm Hg, and cool, pale extremities. The latest arterial blood gas (ABG) results are pH $7.26$ , $PaCO_2$ $62$ mm Hg, $HCO_3^-$ $25$ mEq/L, and $PaO_2$ $58$ mm Hg. Based on these assessment findings, which of the following clinical judgments and nursing actions are appropriate? Select all that apply.

Analyze the arterial blood gas values as indicative of an uncompensated acid-base imbalance of respiratory origin.Answer
Recognize the vital signs and peripheral assessment findings as clinical indicators of a shock state.Answer
C
Interpret the arterial blood gas values as demonstrating partial metabolic compensation.
D
Attribute the tachycardia and hypotension solely to the expected physiological effects of positive pressure ventilation.
E
Elevate the head of the bed to a high-Fowler's position to maximize lung expansion.

Answer

The correct clinical judgments are concluding that the ABG demonstrates an uncompensated acidotic state of respiratory origin and recognizing the vital signs as indicators of a shock state.

The arterial blood gas results show a pH less than

7.35

and a

PaCO_2

greater than

45

mm Hg, which indicates an acidotic state of respiratory origin. Because the bicarbonate (

HCO_3^-

) level is within the normal range of

22-26

mEq/L, there is no metabolic compensation. Furthermore, the combination of tachycardia, hypotension, and cool, pale extremities strongly indicates inadequate tissue perfusion and compensatory vasoconstriction, which are classic early signs of a shock state.

Step-by-Step Solution

Analyze the arterial blood gas (ABG) values.

pH is

7.26

(acidosis),

PaCO_2

62

mm Hg (respiratory origin), and

HCO_3^-

25

mEq/L (normal, indicating it is uncompensated).

To determine the client's acid-base status and evaluate the effectiveness of the mechanical ventilation.

Evaluate the hemodynamic parameters and physical assessment findings.

Heart rate is

132

bpm, blood pressure is

86/52

mm Hg, and extremities are cool and pale.

To identify signs of inadequate tissue perfusion or impending cardiovascular collapse.

Synthesize the findings to determine appropriate clinical conclusions and interventions.

The client has an uncompensated respiratory acid-base imbalance and is exhibiting signs of a shock state.

To prioritize care and avoid harmful interventions, such as elevating the head of the bed during severe hypotension.

Key Concept

Early recognition of shock and accurate interpretation of uncompensated acid-base imbalances are critical for prioritizing interventions and preventing hemodynamic collapse in mechanically ventilated clients.

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