benign plural effusion: PleurX catheter or thoracentesis due to 2.5 years of fluid accumulation

Dilemma: Pleurx catheter vs thoracentesis for postsurgical benign plural effusion combined with slow chylothorax for 2.5 y. 90 y o dear mom had thoracentesis a few times (last one 15 months ago) for evaluation of fluid. Now for the first time ever she is out of breath and has cough due to her moderate R plural effusion increase. Due to ultra low fat diet chylothorax is minimal. In the past asymptomatic plural effusion returned in the same amount within 2 days of thoracentesis. First year after last thoracentesis was asymptomatic but now one or the other needs to be done. Catheter downsides: daily pain, discomfort, and unknown. Thoracentesis's hesitation: I dont know whether there is increased risk due to R lung had been in the pleural effusion environment for 2.5 y and is there a risk to suddenly removing about a liter for a 90 y o- does it add any thoracentesis post procedure risks, like pneumothorax, ability of the lung to open? Which procedure out of two is less risky and which one makes more sense in this case? Thank you very much for any thoughts or sharing experiences