Scavenging Hood (Case 1981)



Women & Infants Hospital

Providence, RI                        


Brief Description:


Numerous studies have suggested that chronic exposure to trace levels of anesthetic gas is harmful to operating room personnel. In the delivery of pediatric general anesthesia, an uncuffed endotracheal tube is normally used which can result in considerable volatile anesthetic and nitrous oxide contamination of the OR.


The current invention describes a method to reduce exposure to these anesthetic gases by means of an anesthetic scavenging hood. In a study with pediatric patients undergoing endotracheal anesthesia with in which measurements were made of all ambient gases, the application of vacuum source together with the anesthesia scavenging hood resulted in a very significant decrease in levels of ambient gas. Discontinuation of the vacuum force to the anesthesia hood resulted in a marked increase in ambient levels of ambient gas.




US Patent 6,076,524 is issued (06/20/2000)

Panni and Corn (2002) Anesthesia & Analgesia; 95:656—60

Patent Information:
For Information, Contact:
Margaret Shabashevich,
Manager of Operations
Technology Ventures Office
Brown University
Stephen Corn
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