The normal central venous pressure (CVP) reading is between?

Appeared in: SCTIMST Staff Nurse - 2015 (Set-A)

Explanation

The normal Central Venous Pressure (CVP) is 5 to 10 cm H₂O.
This range is equivalent to approximately 3.7 to 7.4 mmHg (1 mmHg = 1.36 cm H₂O).
It reflects adequate fluid volume (euvolemia) and normal pressure in the right atrium, which is an indicator of right ventricular preload.

Option A: A CVP reading of 0-5 cm H₂O is below the normal range and indicates hypovolemia (low fluid volume).
Option C: A CVP reading of 10-15 cm H₂O is elevated and suggests a state of fluid overload or impaired cardiac function.
Option D: A CVP reading of 15-20 cm H₂O is significantly elevated and points to severe fluid overload or cardiac dysfunction.

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.
CVP monitoring is a cornerstone of hemodynamic management in intensive care, guiding fluid resuscitation and the use of diuretics or vasoactive drugs.
Inaccurate measurement due to incorrect transducer leveling is a common and preventable error. A transducer placed too low will give a falsely high CVP, while one placed too high will give a falsely low reading.
Always correlate the CVP number with the overall clinical picture, including blood pressure, heart rate, urine output, and signs of edema or dehydration.

How to Approach the Question

Identify the core of the question: it asks for a specific normal hemodynamic value.
Recognize the parameter being measured: Central Venous Pressure (CVP).
Note the specific units requested in the options: centimeters of water (cm H₂O), which is a common unit for bedside CVP measurement.
Recall the standard normal range for CVP in cm H₂O from your studies.
Compare the recalled value (5-10 cm H₂O) to the given options.
Select the option that directly matches the known normal range.

Concept Tested & Keywords

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E6 Medicine Macleod Clinical Examination 15e p. 64-66

E6 Medicine Harrison 22e Part 1 p. 1946-1948

Practise the full SCTIMST Staff Nurse - 2015 (Set-A)

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