US 12,329,922 B2
System and method for monitoring and controlling intrauterine pressure using a pressure cuff
Jordan A. Whisler, Brookline, MA (US); and Nikolai D. Begg, Wellesley, MA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Jul. 18, 2022, as Appl. No. 17/867,548.
Application 17/867,548 is a division of application No. 16/241,075, filed on Jan. 7, 2019, granted, now 11,389,198.
Prior Publication US 2022/0361919 A1, Nov. 17, 2022
Int. Cl. A61M 3/02 (2006.01); A61B 17/135 (2006.01); A61B 17/42 (2006.01); A61B 5/022 (2006.01)
CPC A61M 3/0208 (2014.02) [A61B 17/135 (2013.01); A61B 17/42 (2013.01); A61M 3/0202 (2021.05); A61M 3/0216 (2014.02); A61M 3/022 (2014.02); A61M 3/0233 (2013.01); A61M 3/0262 (2013.01); A61B 5/022 (2013.01); A61B 2017/4216 (2013.01); A61M 3/0245 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3344 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fluid management system comprising:
a collapsible bag retaining a fluid and configured to deliver the fluid into a body cavity;
a cuff configured to apply pressure to the collapsible bag to urge the fluid from the collapsible bag into the body cavity;
an air pump;
an air hose interconnecting the air pump with the cuff to enable pumping of air from the air pump into the cuff; and
a controller including a processor and non-transitory computer readable medium storing instructions that, when executed by the processor, cause the controller to:
monitor a change in pressure of the cuff resulting from the delivery of the fluid from the collapsible bag into the body cavity;
determine a bag volume change of the collapsible bag based on the change in the pressure of the cuff;
calculate a fluid flow of the fluid from the collapsible bag into the body cavity based on the bag volume change of the collapsible bag; and
determine a pressure of the body cavity based in part on the fluid flow of the fluid according to:
PU=PCB=QFRIN+ρgΔH,
wherein PU is the pressure of the body cavity,
PCB is a pressure of the collapsible bag,
QF is the fluid flow from the collapsible bag,
RIN is a resistance of output from the collapsible bag,
ρ is a density of the fluid,
g is gravity, and
Δh is a height of the collapsible bag.