What is the normal splenic volume index (SVI) range?

What is the normal splenic volume index (SVI) range?

• A. 5-15
• B. 10-40
• C. 8-35
• D. 7-25

Answer: (C)

Splenic size is not the same in every patient, so measuring raw spleen volume can be misleading. The splenic volume index (SVI) fixes that by indexing the spleen’s volume to the patient’s body size, giving a size-adjusted measure in mL per square meter of body surface area. You estimate the spleen volume from ultrasound (often with the ellipsoid formula using length, width, and thickness) and then divide by the patient’s BSA. In healthy individuals, the SVI typically falls around 8 to 35 mL/m^2. Values above this upper limit suggest splenomegaly beyond what’s expected for body size, whereas values within this range reflect normal size for that patient.

Splenic size is not the same in every patient, so measuring raw spleen volume can be misleading. The splenic volume index (SVI) fixes that by indexing the spleen’s volume to the patient’s body size, giving a size-adjusted measure in mL per square meter of body surface area. You estimate the spleen volume from ultrasound (often with the ellipsoid formula using length, width, and thickness) and then divide by the patient’s BSA. In healthy individuals, the SVI typically falls around 8 to 35 mL/m^2. Values above this upper limit suggest splenomegaly beyond what’s expected for body size, whereas values within this range reflect normal size for that patient.