# How is CT pleural effusion volume calculated?

## How is CT pleural effusion volume calculated?

Conversion of this measurement to the appropriate volume is possible by regression equation: Volume = 0.365 × b(3) – 4.529 × b(2) + 159.723 × b – 88.377. Conclusion: We devised a simple method of conversion of a single planar measurement on CT scan to the volume of pleural effusion.

### How much fluid is needed for pleural effusion?

Pleural effusion is the pathologic accumulation of fluid in the pleural space. The physiologic amount of pleural fluid is approximately 5 mL….Table 3.

Effusion Size Criterion
AP Quartile AP Depth
Moderate 25%-50% 3.0-10.0 cm
Large 50%-75% or 75%-100% > 10.0 cm

What can you do about a small pleural effusion?

Pleural effusion can also be treated by removing fluid from the pleural space. This may help relieve symptoms, such as shortness of breath and chest pain. It can also help the lungs to expand more fully. Fluid can be removed by placing a needle into the pleural space.

How long can I live with pleural effusion?

Patients with Malignant Pleural Effusions (MPE) have life expectancies ranging from 3 to 12 months, depending on the type and stage of their primary malignancy.

## How to calculate the volume of the pleural effusion?

the first Goecke formula uses the craniocaudal extent (lateral height) of the effusion one caliper is placed in the near field in the costophrenic angle the subsequent caliper is placed in the far field at the lung base, constituting a maximum distance between lung and diaphragm pleural effusion volume (mL) = distance (cm) x 90

### How much can be removed from a pleural effusion?

Incidentally, it is worth noting that a double-standard exists regarding drainage of a pleural effusion via thoracentesis versus chest tube. Although it is taboo to remove >1500 ml via thoracentesis, it is not uncommon to see a chest tube placed to suction at -20 cm pressure with immediate drainage of much larger volumes.

Is the erect 2 Formula related to volume drained?

Conclusion: Although both erect formulae showed similar correlations, the erect 2 formula (Goecke 2) was most closely correlated with the actual volume drained. Keywords: Quantification; Thoracentesis; Ultrasonography; Volume estimation; Volumetry; Pleural effusion.

How can ultrasound be used to detect pleural fluid?

In controlled settings ultrasound may detect constitutive pleural fluid, can reliably detect effusions >20 mL in clinical settings, and may approach the sensitivity and specificity of computed tomography.

16/10/2020