US 12,285,202 B2
Device and method for tissue identification
Christian Huber, Muehlheim (DE); Dieter Weisshaupt, Immendingen (DE); Christoph Rothweiler, Donaueschingen (DE); Detlef Russ, Renningen (DE); Oliver Fugger, Ulm (DE); Raimund Hibst, Erbach (DE); Alwin Kienle, Blaustein (DE); and Florian Foschum, Neu-Ulm (DE)
Assigned to Aesculap AG, Tuttlingen (DE)
Appl. No. 17/633,025
Filed by Aesculap AG, Tuttlingen (DE)
PCT Filed Aug. 5, 2020, PCT No. PCT/EP2020/072028
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/023781, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 10 2019 121 365.7 (DE), filed on Aug. 7, 2019.
Prior Publication US 2022/0287760 A1, Sep. 15, 2022
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 2018/00589 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00666 (2013.01); A61B 2018/00708 (2013.01); A61B 2018/00791 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00904 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A medical high frequency surgical instrument comprising:
at least one instrument branch,
at least one light source which generates a first light with a certain illumination light spectrum which can be emitted in a direction towards a tissue, and
at least one sensor, which is provided and adapted to measure a remission spectrum of a second light which is reflected by the tissue as a result of light impingement by the at least one light source, and to convert the measured remission spectrum into a detector signal according to the measured remission spectrum,
wherein a calculating unit is provided and adapted to:
receive the detector signal from the at least one sensor,
calculate a theoretical remission spectrum based on a solution for describing a light propagation in the tissue, assuming estimated volume fractions of individual tissue components which are present in the tissue,
adapt the theoretical remission spectrum to the measured remission spectrum;
calculate at least one volume fraction of a first tissue component from the measured remission spectrum via a minimization algorithm with which the theoretically calculated remission spectrum is fitted to the measured remission spectrum by varying respective volume fractions of the individual tissue components present in the tissue;
calculate at least an absorption maximum from an absorption spectrum of the tissue;
calculate a temperature in the tissue by comparing the absorption maximum with at least one reference; and
control or adjust or switch off the medical high frequency surgical instrument based on the calculated at least one volume fraction of the first tissue component and one or both of:
the calculated temperature, and
a calculated tissue impedance of the tissue component.