Normal range of CVP is?

Appeared in: PGIMER Sangrur NO - 2023

Explanation

The accepted normal range for Central Venous Pressure (CVP) in a healthy adult is 5-10 cm H₂O.
This range corresponds to approximately 2-6 mmHg, which reflects normal right atrial pressure and adequate right ventricular preload (volume).
CVP is a fundamental hemodynamic parameter used to assess a patient's fluid volume status and the heart's ability to manage fluid return.
Values within this range typically indicate a state of euvolemia (normal fluid balance).

Option A: This range is too broad. While the lower limit of 5 cm H₂O is correct, the upper limit of 15 cm H₂O is too high and would indicate a state of fluid overload or impaired cardiac function.
Option B: This entire range represents an elevated CVP. A reading of 10 cm H₂O is at the very top of the normal range, and anything above it is considered high.
Option C: This range indicates a significantly high CVP. These values are well above the normal limit and suggest a serious condition.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Normal range of Central Venous Pressure (CVP) as background academic context rather than a clinical decision trigger.
Accurate CVP measurement is vital for guiding fluid resuscitation in critically ill patients, helping nurses prevent both under-hydration (leading to hypoperfusion) and over-hydration (leading to pulmonary edema).
A sudden drop in CVP can be an early warning sign of hemorrhage or severe vasodilation (as in sepsis), prompting immediate nursing assessment and intervention to stabilize the patient.
What if? If a patient is receiving positive pressure mechanical ventilation, the CVP reading may be falsely elevated due to increased intrathoracic pressure. Nurses must interpret the trend in the context of other clinical signs, knowing the true CVP is likely lower than the measured value.

How to Approach the Question

This is a factual recall question that tests your knowledge of a specific clinical parameter.
First, identify the core concept being asked: the 'Normal range of CVP'.
Recall the standard value for CVP taught in nursing. Remember that it can be expressed in two units: cm H₂O or mmHg.
Scan the options provided. They are all in cm H₂O.
Compare the options to the known normal range of 5-10 cm H₂O.
Select the option that exactly matches this standard range.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 1 p. 1902-1904

Practise the full PGIMER Sangrur NO - 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.