Subarachnoid pleural fistula (SPF) is an aberrant communication between the pleural cavity and subarachnoid space. resulting in uncontrolled cerebrospinal fluid drainage. The negative pressure of the pleural cavity creates a continuous suctioning effect. thereby impeding the spontaneous closure of these fistulas. https://www.roneverhart.com/Tiny-Chicle-Squares-Chewing-Gum-Pink-1-5LB-Jar/