US 12,419,681 B2
Device and method for determining a switch-off time of a medical instrument
Christian Huber, Muehlheim (DE); Christoph Rothweiler, Donaueschingen (DE); Detlef Russ, Renningen (DE); Oliver Fugger, Ulm (DE); and Raimund Hibst, Erbach (DE)
Assigned to Aesculap AG, Tuttlingen (DE)
Appl. No. 17/632,870
Filed by Aesculap AG, Tuttlingen (DE)
PCT Filed Aug. 6, 2020, PCT No. PCT/EP2020/072171
§ 371(c)(1), (2) Date Feb. 4, 2022,
PCT Pub. No. WO2021/023833, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10 2019 121 375.4 (DE), filed on Aug. 7, 2019.
Prior Publication US 2022/0280223 A1, Sep. 8, 2022
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1442 (2013.01) [A61B 2018/00601 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00708 (2013.01); A61B 2018/00791 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for determining a switch-off time of a medical instrument, comprising the steps of:
measuring a duration for which a temperature of a tissue is above a threshold value of at least 85° Celsius;
calculating a mean temperature as from a first time when the temperature of the tissue reaches the threshold value of at least 85° Celsius;
measuring and/or calculating an energy input until the temperature of the tissue reaches the threshold value of at least 85° Celsius;
calculating a parameter SP, which links the duration, the mean temperature and the energy input; and
switching off the medical instrument at a predetermined value of the parameter SP,
wherein the parameter SP is a result from a duration for which the temperature of the tissue is above the threshold value of at least 85° Celsius, multiplied by the mean temperature as from the first time when the temperature of the tissue reaches the threshold value of at least 85° Celsius, divided by the energy input until the temperature of the tissue reaches the threshold value of at least 85° Celsius.