US 11,980,425 B2
Tracker for a surgical navigation system
Fadi Ghanam, Schallstadt (DE); Jochen Breisacher, Teningen (DE); Florian Herrmann, Schwanau (DE); Emeric Umbdenstock, Freiburg (DE); Reinhold Zimmermann, Freiburg (DE); and Gerd Ulrich Gamm, Freiburg (DE)
Assigned to Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed by Stryker European Operations Holdings LLC, Kalamazoo, MI (US)
Filed on Apr. 18, 2019, as Appl. No. 16/388,354.
Claims priority of application No. 18168182 (EP), filed on Apr. 19, 2018.
Prior Publication US 2019/0321108 A1, Oct. 24, 2019
Int. Cl. A61B 34/20 (2016.01); A61B 10/02 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 10/0233 (2013.01); A61B 2034/2055 (2016.02); A61B 2034/2057 (2016.02); A61B 2034/2072 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A tracker for a surgical navigation system, the tracker comprising:
a carrier; and
an electrical circuit disposed on the carrier, wherein the electrical circuit comprises:
at least three infrared light emitting diodes, IR-LEDs; and
only one battery configured to provide power to operate the at least three IR-LEDs, wherein the electrical circuit is configured to cause the at least three IR-LEDs to continuously and simultaneously emit infrared light for being sensed by a camera of the surgical navigation system by supplying a current through each of the at least three IR-LEDs that is limited to not exceed 15 milliampere (mA), wherein the battery is a button cell battery.