2. Thoracentesis

The ultrasound shows a pleural effusion (Figure 2A). The diaphragm can be identified as the nearly vertical bright line (arrow). The dark space to the left of the diaphragm is the pleural effusion (star). The patient has no apparent contraindications and a thoracentesis is performed. The result fluid is shown in Figure 2B.

Figure 2. A: Point of contact ultrasound of the left pleural effusion showing the diaphragm (arrow) and pleural effusion (star). B: Fluid from thoracentesis.

What tests should be ordered on the pleural effusion? (Click on the correct answer to proceed to the third of seven pages)

  1. Adenosine deaminase
  2. pH
  3. Triglycerides
  4. 1 and 3
  5. All of the above