What is the typical central venous pressure range in millimeters of mercury (mmHg)?

What is the typical central venous pressure range in millimeters of mercury (mmHg)?

• A. 6–11 mmHg
• B. 0–2 mmHg
• C. 20–25 mmHg
• D. 80–100 mmHg

Answer: (A)

Central venous pressure reflects the right atrial preload—the pressure in the venous system as blood returns to the heart and fills the right atrium. In clinical practice, this preload pressure is typically in the low single digits of millimeters of mercury, often cited roughly around 2–8 mmHg, with values in the higher end indicating a higher preload and potential fluid overload. The options provided include a range that is much lower than normal (0–2 mmHg) and ranges that are extremely high (20–25 mmHg and 80–100 mmHg) that would not be considered typical. The range around 6–11 mmHg sits closest to the commonly observed normal-to-mildly elevated preload in many clinical contexts, making it the best choice among the given options.

Central venous pressure reflects the right atrial preload—the pressure in the venous system as blood returns to the heart and fills the right atrium. In clinical practice, this preload pressure is typically in the low single digits of millimeters of mercury, often cited roughly around 2–8 mmHg, with values in the higher end indicating a higher preload and potential fluid overload. The options provided include a range that is much lower than normal (0–2 mmHg) and ranges that are extremely high (20–25 mmHg and 80–100 mmHg) that would not be considered typical. The range around 6–11 mmHg sits closest to the commonly observed normal-to-mildly elevated preload in many clinical contexts, making it the best choice among the given options.