US 12,458,742 B2
System and method for managing reduced pressure delivered to a tissue site
Christopher Brian Locke, Bournemouth (GB); David Robson Blandford, Fordingbridge (GB); and Richard Daniel John Coulthard, Verwood (GB)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
Filed on May 10, 2021, as Appl. No. 17/316,171.
Application 17/316,171 is a continuation of application No. 15/856,711, filed on Dec. 28, 2017, granted, now 11,033,664.
Application 15/856,711 is a continuation of application No. 15/288,620, filed on Oct. 7, 2016, granted, now 9,889,240, issued on Feb. 13, 2018.
Application 15/288,620 is a continuation of application No. 13/451,384, filed on Apr. 19, 2012, granted, now 9,474,838, issued on Oct. 25, 2016.
Claims priority of provisional application 61/477,406, filed on Apr. 20, 2011.
Prior Publication US 2021/0260270 A1, Aug. 26, 2021
Int. Cl. A61M 1/00 (2006.01)
CPC A61M 1/742 (2021.05) [A61M 1/80 (2021.05); A61M 1/962 (2021.05); A61M 1/92 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A pump for delivering reduced pressure to a tissue site, comprising:
a motor for driving the pump; and
a controller operatively coupled to the motor;
wherein the controller is configured to:
operate a power-on boost procedure by providing a variable current and voltage to the motor for a predetermined time period;
provide a substantially constant current to the motor based on a target pressure, and
determine a supply pressure by determining whether a motor voltage corresponding to a voltage drop across the motor that varies with time is within a predetermined range of voltages, the predetermined range of voltages being based on the target pressure.
 
11. A method for delivering reduced pressure to a tissue site, comprising:
providing a variable current and voltage to a motor for a time period;
providing a substantially constant current to the motor based on a target pressure;
determining a supply pressure by determining whether a voltage at the motor that varies with time is within a predetermined range of voltages, the predetermined range of voltages being based on the target pressure; and
driving a pump with the motor, the pump configured to be fluidly coupled to the tissue site.