US Patent Issued to The Second Affiliated Hospital of XJTU on Oct. 21 for "Tracheal intubation with automatic sputum excretion by unidirectional sputum flow" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,297, issued on Oct. 21, was assigned to The Second Affiliated Hospital of XJTU (Xi'an, China).

"Tracheal intubation with automatic sputum excretion by unidirectional sputum flow" was invented by Lei Cao (Xi'an, China), Wei Li (Xi'an, China) and Yongxiao Cao (Xi'an, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tracheal intubation with automatic sputum excretion by unidirectional sputum flow is disclosed and includes a layer of unidirectional sputum-flow structure laid in an inner wall of the endotracheal tube. The unidirectional sputum-flow structure includes multiple partition plates evenly arranged on the inner wall in a circumferential d...