The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 2013
Filed:
Mar. 04, 2011
Pelu Tran, Milpitas, CA (US);
Khang Trong Dinh, San Jose, CA (US);
Andrew Pipathsouk, Rockford, IL (US);
Benjamin Chung, Los Altos, CA (US);
Hongbin LI, Mountain View, CA (US);
Pelu Tran, Milpitas, CA (US);
Khang Trong Dinh, San Jose, CA (US);
Andrew Pipathsouk, Rockford, IL (US);
Benjamin Chung, Los Altos, CA (US);
Hongbin Li, Mountain View, CA (US);
The Board of Trustees of the Leland Stanford Junior University, Palo Alto, CA (US);
Abstract
A method and apparatus are provided for a fluid level insertion indicator that provides immediate feedback to a surgeon by draining when a tip of a needle has entered a body lumen, such as peritoneal cavity. An apparatus includes a handle connected to a hollow needle and a hollow stylet that extends through the hollow needle and has a blunt distal end that includes an opening for passing fluid. A spring biases the stylet to extend past the sharp distal end of the needle absent resistance by tissue against the stylet. An at least partially translucent pressure chamber configured to hold a quantity of fluid under pressure is connected to the proximal end of the stylet. The pressure chamber and stylet form a conduit for passing fluid through the opening in the blunt distal end when the stylet extends past the sharp distal end of the hollow needle.