US 12,109,036 B2
Devices and methods to measure gastric residual volume
Daniel R. Burnett, San Francisco, CA (US); Marcie Hamilton, San Francisco, CA (US); Evan S. Luxon, Omaha, NE (US); Alexander Vergara, San Francisco, CA (US); and Saheel Sutaria, El Cerrito, CA (US)
Assigned to Gravitas Medical, Inc., Berkeley, CA (US)
Filed by Gravitas Medical, Inc., San Francisco, CA (US)
Filed on Feb. 18, 2022, as Appl. No. 17/675,903.
Application 17/675,903 is a continuation of application No. 15/222,670, filed on Jul. 28, 2016, granted, now 11,284,832.
Application 15/222,670 is a continuation of application No. PCT/US2015/014839, filed on Feb. 6, 2015.
Claims priority of provisional application 61/936,804, filed on Feb. 6, 2014.
Prior Publication US 2022/0167910 A1, Jun. 2, 2022
Int. Cl. A61B 5/00 (2006.01); A23L 33/00 (2016.01); A23L 35/00 (2016.01); A61B 1/273 (2006.01); A61B 5/01 (2006.01); A61B 5/03 (2006.01); A61B 5/107 (2006.01); A61B 5/145 (2006.01); A61J 15/00 (2006.01)
CPC A61B 5/4238 (2013.01) [A23L 33/30 (2016.08); A23L 35/00 (2016.08); A61B 1/2736 (2013.01); A61B 5/01 (2013.01); A61B 5/036 (2013.01); A61B 5/1073 (2013.01); A61B 5/14507 (2013.01); A61B 5/14532 (2013.01); A61B 5/14539 (2013.01); A61B 5/14546 (2013.01); A61B 5/4848 (2013.01); A61B 5/486 (2013.01); A61B 5/6847 (2013.01); A61B 5/6852 (2013.01); A61B 5/6865 (2013.01); A61B 5/6871 (2013.01); A61B 5/742 (2013.01); A61J 15/008 (2015.05); A61B 2562/0204 (2013.01)] 44 Claims
OG exemplary drawing
 
1. An apparatus for determining a gastric residual volume (GRV), comprising:
an elongate body having a length;
one or more GRV sensors positioned along the elongate body, wherein the one or more GRV sensors are configured to measure a change in a GRV parameter when positioned within a body lumen of a subject;
one or more placement sensors positioned along the elongate body, wherein the one or more placement sensors are configured to measure a change in a first physiological parameter and in a second physiological parameter when positioned within the body lumen, wherein the first and second physiological parameters comprise conductivity or impedance, and temperature; and
a controller in communication with the one or more GRV sensors and the one or more placement sensors, wherein the controller is configured to determine a GRV based on the change in the GRV parameter, and wherein the controller is further configured to confirm a location of the elongate body within the subject during use based upon the change in the physiological parameter.