Management of Pleural Effusion in CVICU

Definition and Diagnosis

Ultrasound should be used to complement physical examination and conventional chest radiography to diagnose and localize pleural effusions in CVICU patients 2
Ultrasound guidance significantly improves success rates and reduces complications during pleural interventions, with studies showing lower rates of pneumothorax compared to procedures performed without imaging 1, 3

Large-volume diagnostic thoracentesis should be performed to assess symptomatic response to fluid removal, determine lung expandability, and obtain fluid for diagnostic testing 1, 4
Avoid removing more than 1.5L of fluid during a single thoracentesis to prevent re-expansion pulmonary edema 1
Therapeutic pleural interventions should not be performed in asymptomatic patients 4, 3

For symptomatic patients with expandable lung and malignant pleural effusion, either an indwelling pleural catheter (IPC) or chemical pleurodesis can be used as first-line definitive intervention 4, 1
If talc pleurodesis is chosen, either talc poudrage or talc slurry can be used with similar efficacy 4, 3
For patients with non-expandable lung, failed pleurodesis, or loculated effusion, IPCs are recommended over chemical pleurodesis 4, 3
All patients with parapneumonic effusion should receive intravenous antibiotics with coverage for common respiratory pathogens 3
Initial drainage should use a small-bore chest tube (14F or smaller) to reduce complications 3
If pleural fluid pH is low or glucose levels are low, drainage is required as this indicates complicated parapneumonic effusion 3

IPC-associated infections can usually be treated with antibiotics without removing the catheter; consider catheter removal only if the infection fails to improve 4, 1

Use ultrasound guidance for all pleural interventions to improve success and reduce complications 2, 1
When performing talc pleurodesis, use 4-5g of talc in 50ml normal saline, clamp the chest tube for 1 hour after instillation, and remove the tube when 24-hour drainage is 100-150ml 1
For tunneled pleural catheters, avoid placement in patients who are candidates for maximal surgical cytoreduction due to risk of tumor implantation 5
In patients with symptomatic pericardial effusion accompanying pleural effusion, percutaneous catheter drainage or pericardial window may be performed 5

Avoid pleurodesis without confirming complete lung expansion after fluid removal 1, 3
Avoid non-ultrasound guided procedures due to higher risk of pneumothorax (8.9% vs 1.0%) 1
Tunneled pleural catheters are not recommended in patients who are candidates for maximal surgical cytoreduction because of the risk of tumor implantation into the chest wall 5