US 11,752,032 B2
Fluidic bladder pressure control in a therapeutic system
Chesavage Jay A., Palo Alto, CA (US); Marshall Lise, Mountain View, CA (US); and Gregory A. Chesavage, San Jose, CA (US)
Assigned to Vasper Systems, LLC, Kamuela, HI (US)
Filed by VASPER SYSTEMS, LLC, Kamuela, HI (US)
Filed on Sep. 21, 2020, as Appl. No. 17/27,686.
Application 17/027,686 is a continuation of application No. 14/957,556, filed on Dec. 2, 2015, granted, now 10,806,625.
Claims priority of provisional application 62/088,529, filed on Dec. 5, 2014.
Prior Publication US 2021/0015660 A1, Jan. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 7/02 (2006.01); A61F 7/00 (2006.01)
CPC A61F 7/02 (2013.01) [A61F 2007/0029 (2013.01); A61F 2007/0039 (2013.01); A61F 2007/0056 (2013.01); A61F 2007/0092 (2013.01)] 19 Claims
OG exemplary drawing
1. A method for regulating pressure in a pressurized cooling system comprising:
a controller;
a reservoir coupled to a pump, the pump providing a pressure;
the pump coupled to, in sequence, a first hose having a first length, a supply pressure sensor coupled to a second hose having a second length, the second hose coupled to an inlet of a bladder, the bladder having an outlet coupled to a third hose having a third length, the third hose coupled to a return pressure sensor configured to return fluid pumped through the third hose to the reservoir;
the bladder located at a first elevation different from a second elevation of at least one of the supply pressure sensor or the return pressure sensor;
the second length being substantially equal to the third length;
the method comprising:
estimating a pressure in the bladder by averaging a pressure sensor measurement of the supply pressure sensor and a pressure sensor measurement from the return pressure sensor;
comparing the estimated bladder pressure to a setpoint pressure to output a pump control voltage coupled to the pump;
the controller establishing the setpoint pressure by adding a head pressure offset to the desired cuff pressure, the head pressure offset derived from a difference between the first elevation and the second elevation.