ICH Volume Calculator

An ICH Volume Calculator helps estimate the size of an intracerebral hemorrhage from CT measurements. ICH means intracerebral hemorrhage. It is bleeding inside the brain tissue, which can affect Blood Pressure.

Our calculator uses the simple ABC/2 method. This method uses three measurements from a brain CT scan. It gives the estimated bleed volume in mL or cm³.

The ABC/2 method is widely used because it is fast and simple. Research has also found it useful for estimating ICH volume, though irregular or very large bleeds can be less accurate.

ICH Volume Formula

The main ICH volume calculator formula is:

ICH Volume = (A × B × C) ÷ 2

Here, A is the largest diameter of the bleed. B is the diameter at about 90 degrees to A. C is the vertical depth of the bleed.

All three values should be in the same unit. Our calculator converts the values to centimeters before it calculates the volume.

When C is found from CT slices, use:

C = Number of hemorrhage-containing slices × Slice thickness

For example, 12 slices with a 5 mm thickness give:

C = 12 × 0.5 = 6 cm

The calculator then applies the ABC/2 formula.

How to Use Online ICH Volume Calculator

Using an intracerebral hemorrhage volume calculator is simple.

1. Enter A
   Enter the largest diameter of the hemorrhage. You can enter it in cm, mm, or inches.
2. Enter B
   Enter the perpendicular diameter of the hemorrhage. Use the CT slice with the largest bleed area when taking these measurements.
3. Enter C
   You can enter the vertical depth directly. You can also use the slice option and enter the number of hemorrhage-containing slices and slice thickness.
4. Check the units
   The calculator converts the measurements to centimeters. This helps avoid errors from mixed units.
5. Calculate the result
   The calculator multiplies A, B, and C, then divides the result by 2. The final result is shown in mL.

Example ICH Volume Calculation

Suppose a CT scan shows these measurements:

A = 5 cm

B = 4 cm

C = 6 cm

Use the ICH volume formula:

ICH Volume = (A × B × C) ÷ 2

Insert the values:

ICH Volume = (5 × 4 × 6) ÷ 2

ICH Volume = 120 ÷ 2

ICH Volume = 60 mL

So, the estimated ICH bleed volume is 60 mL.

Example Using CT Slices

Suppose the hemorrhage appears on 12 CT slices. Each slice is 5 mm thick.

First convert the slice thickness:

5 mm = 0.5 cm

Now calculate C:

C = 12 × 0.5 = 6 cm

If A is 5 cm and B is 4 cm:

ICH Volume = (5 × 4 × 6) ÷ 2

ICH Volume = 60 mL

This is how the ICH size calculator can estimate the volume of a brain bleed from CT measurements.

ICH Volume and ICH Score

The ICH Score, which can be related to Stroke Volume, is a separate clinical scoring system. It uses several findings, including Glasgow Coma Scale, age, intraventricular hemorrhage, hemorrhage location, and ICH volume. An ICH volume of 30 mL or more contributes one point to the original ICH Score.

So, an ICH score volume calculator should not be confused with an ICH volume calculator. The volume calculator estimates the size of the hemorrhage. The ICH Score combines volume with other clinical findings.

How Do You Calculate ICH Volume?

The standard quick method is the ABC/2 method:

ICH Volume = A × B × C ÷ 2

A and B come from the CT image. C can be measured directly or estimated from the number of slices and slice thickness.

This method estimates the hematoma as an ellipsoid. It is useful for a quick bedside estimate. More detailed CT-based planimetry or automated volumetric software may be preferred when greater precision is needed. ABC/2 can be less accurate with irregular, heterogeneous, lobar, or very large hemorrhages.

FAQs

What is the ICH volume formula?

The standard formula is ICH Volume = A × B × C ÷ 2. A is the largest diameter, B is the perpendicular diameter, and C is the vertical depth.

How do you calculate ICH volume from CT?

Measure A and B on the CT slice with the largest hemorrhage area. Then determine C from the hemorrhage depth or from slice count multiplied by slice thickness. Apply the ABC/2 formula.

What is the ICH size calculator used for?

An ICH size calculator estimates the volume of an intracerebral hemorrhage. The result is usually reported in mL or cm³.

How do you calculate blood volume in hemorrhagic stroke?

For an intracerebral hemorrhage, the bleed volume can be estimated from CT using the ABC/2 method. This estimates the hematoma volume, not the patient's total blood volume.

How is child blood volume calculated?

Child blood volume is a different medical calculation. It is generally estimated from body weight and an age-specific blood-volume factor. It is not part of the ABC/2 ICH calculation.

How do you calculate the volume of a CT scan?

A CT scan itself does not have an “ICH volume.” In this context, CT images are used to estimate the volume of the hemorrhage seen on the scan. The ABC/2 method estimates the bleed volume, not the physical volume of the CT scan.

Is the ICH volume the same as the ICH Score?

No. ICH volume is one measurement. The ICH Score is a broader clinical score that uses volume along with other findings.