THE MEDICAL IMAGING EXPERIENCE
INFORMATION FOR THE PATIENT
PARACENTESIS/THORACENTESIS ULTRASOUND

WHAT IS IT?
Ultrasound procedures involve the use of very high frequency sound waves. The actual sound cannot be heard with the human ear. The sound waves are sent into the body using a hand held instrument called a transducer. Ultrasound is used to locate and remove fluid collections in your body.

WHAT WILL HAPPEN TO ME?
The sonographer (the person who operates the ultrasound machine) will assist you as you lie on your back on a padded table. A warm gel will be placed on your skin to allow sound to travel between your body and the ultrasound machine. The procedure will be explained to you and your consent for the procedure will be obtained. The sonographer will make a mark on your skin so the radiologist knows where to drain the fluid. The doctor (radiologist) will numb your skin so all you will feel is pressure. A needle will be inserted that will drain the fluid. After the procedure is complete you will be able to leave immediately.

HOW LONG WILL THIS TEST TAKE?
This ultrasound procedure usually takes 45 - 60 minutes to complete.

WHAT WILL I FEEL -- WILL IT HURT?
You will feel pressure when the sonographer marks your skin. The numbing medicine may cause a temporary burning sensation. When the needle is inserted, all you should feel is pressure. 

WHAT WILL THE TEST SHOW?
The sonographer will locate the fluid to guide the radiologist in placing the needle. If fluid is removed from your lung (Thorocentesis) you should be able to breath easier after the procedure. You may have a cough during the procedure and for a short period after the procedure. If fluid is removed from your abdomen (Paracentesis) the swelling in your abdomen should decrease significantly.  

HOW DO I GET READY?
Blood work will be needed prior to the procedure, but no other preparation is necessary.

Reviewed: September 2005