US 12,133,716 B2
Method of monitoring and/or measuring blood loss
Christopher A. Carew, Fair Oaks Ranch, TX (US); and Jian Ling, Spring Branch, TX (US)
Assigned to Cypher Medical, LLC, Bandera, TX (US)
Filed by Cypher Medical, LLC, Bandera, TX (US)
Filed on Sep. 12, 2022, as Appl. No. 17/943,126.
Application 17/943,126 is a continuation of application No. 16/557,708, filed on Aug. 30, 2019, granted, now 11,439,310.
Application 16/557,708 is a continuation in part of application No. 15/868,983, filed on Jan. 11, 2018, granted, now 10,401,347, issued on Sep. 30, 2019.
Claims priority of provisional application 62/445,067, filed on Jan. 11, 2017.
Prior Publication US 2023/0087527 A1, Mar. 23, 2023
Prior Publication US 2023/0410664 A9, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G08G 5/00 (2006.01); A61B 5/02 (2006.01); G01F 22/00 (2006.01); G01N 33/49 (2006.01); G01N 1/40 (2006.01)
CPC A61B 5/02042 (2013.01) [G01F 22/00 (2013.01); G01N 33/49 (2013.01); G08G 5/0021 (2013.01); G08G 5/003 (2013.01); G01N 2001/4083 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for approximating blood volume in a fluid collected from a subject comprising:
receiving a volume of fluid collected from the subject into a container, wherein the container has a known red blood cell packing ratio;
determining a volume in milliliters in the container of sedimented red blood cells from the fluid; and
determining a volume of blood in milliliters in the fluid from the subject, wherein the volume of sedimented red blood cells in the container provides an approximation of blood volume in the fluid from the subject.