Patients planned to undergo a pleural tap will get verbal explanation or watch a personalized guidance video in addition to verbal explanation. Questionnaires will be filled to assess the effect of the video training on understanding, cooperation and anxiety.

100 patients with pleural effusion, planned to undergo a diagnostic or therapeutic pleural tap, will be randomized to watch a personalized custom video training, explaining the procedure, in addition to the verbal explanation given by the medical staff, or to get the standard verbal explanation alone. Questionnaires regarding their understanding of the procedure, their feelings and the level of anxiety will be filled before and after the video/verbal explanation, and after the procedure. the study aims to check whether the video training provides better understanding of the procedure, increases cooperation and engagement and decreases anxiety.

Inclusion Criteria:

• patients hospitalized in Internal medicine C and D, Tel-Aviv Sourasky Medical Centers
• Patients with pleural effusion, planned to undergo diagnostic or therapeutic pleural tap
• Patients who can read and understand the questions
• Patients who were interested in participating in the clinical trial and signed an informed consent form

Exclusion Criteria:

• Minors < 18 years of age
• Pregnant women
• Patients who cannot read and understand, at the discretion of the investigator
• Patients which their medical condition does not allow them to undergo the study procedure