Abstract P194: Validation Of A Novel Device For Prevention Of Pneumothorax During Vascular Access.
Pneumothorax is a well-defined complication of vascular access. Presumably, it is due to creation of a communication between the pleural and pulmonary or atmospheric pressures. We hypothesized that the use of a simple device during access could halt such communication and prevent development of pneumothorax.
Methods: The device consists of a slender shaft of bioabsorbable material which is inserted through the lumen of a needle believed to have created a communication pathway. Bi-directional distal expanding tines stabilize the device in the tissue after it is passed through the needle; the needle is subsequently removed, leaving the device to create a plug coursing the needle tract. In a canine model (3 animals), multiple needle sticks (14 gauge) through the chest wall, penetrating the lung parenchyma, were performed. When used, the device was easily advanced through the needles and self-anchored. After a 30 minute observation period the presence or absence of pneumothorax was assessed. In 2 animals the device was then removed. After 30 minutes the presence or absence of pneumothorax was reassessed. In another animal bilateral punctures were done with the device used in the right side (Figure⇓).
Results: 32 puncture sites were created. In all cases no pneumothorax developed after use of the device. In animal 1 and 2 upon removal of the device and 30 minutes of observation pneumothoraces were noted in all cases. In animal 3 there was no pneumothorax on the side of device placement.
Conclusion: This device prevents occurrence of pneumothoraces associated with communication of a needle with pulmonary parenchyma. Its use may increase the safety of vascular access procedures.