This procedure has historically been performed in the catheterization laboratory, but is now usually performed in the procedure room of an intensive care unit, or even at the bedside.
An IV line is inserted in case fluids or medications need to be given. Medication may be given to prevent vasovagal reflex resulting in bradycardia (a slowing of the heartbeat) and hypotension (fall in blood pressure). The insertion site just below the sternum (breastbone) will be cleansed and a local anesthetic will be given.
A pericardiocentesis needle will then be introduced into the pericardial sac. Electrocardiographic (ECG) leads may be attached by a clip to the needle to help with proper needle positioning. An echocardiogram is more frequently used to help in positioning the needle and monitoring the drainage procedure.
Once the pericardial sac is reached, a guide wire is passed, the needle removed, and a catheter replaces it. The fluid is withdrawn through this catheter and put into containers. Usually the indwelling pericardial catheter is left in place for continuous draining for several hours.
Surgical pericardiocentesis (i.e., drainage of the pericardium through a more invasive procedure, requiring local anesthesia) may be necessary in difficult cases.
|