Can a percutaneous liver biopsy cause bilateral pleural effusions and ascites?

No: it sounds like the liver itself is having problems which can cause effusions and ascites. the liver biopsy was done in attempt to determine the cause/severity but didn't cause the problem

No.: These would be signs of liver and maybe coexisting heart failure. The biopsy was likely done to confirm liver damage and cirrhosis due to alcohol, hepatitis or other primary cause of liver damage. Risks of biopsy would be infection and bleeding predominantly. Was the biopsy guided by ultrasound or fluoroscopy?

Not likely: Most likely the liver condition that you suffer from is at the root of your pleural effusions and ascites. A paracentesis- an abdominal tap or a thoracentesis, a pleural tap might help in better understanding their etiology.

No: no, not generally. liver disease can cause pleural effusions and ascites.

No: not likely. The most likely explanation is the ascites is causing the effusion.

No,: a percutaneous liver biopsy would not cause ascites and pleural effusions. If you have cirrhosis or other generalized liver dysfunction, that could be the cause.