US 12,471,999 B2
Method of orthopedic treatment
Alvin Chao-Yu Chen, Taoyuan (TW); Yi-Sheng Chan, Taoyuan (TW); Chi-Pin Hsu, Taipei (TW); Shang-Chih Lin, Taipei (TW); Chin-Ju Wu, New Taipei (TW); and Jeng-Ywan Jeng, Taipei (TW)
Assigned to CHANG GUNG MEMORIAL HOSPITAL, LINKOU, Taoyuan (TW); and NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Taipei (TW)
Filed by Chang Gung Memorial Hospital, Linkou, Taoyuan (TW); and National Taiwan University of Science and Technology, Taipei (TW)
Filed on Aug. 22, 2023, as Appl. No. 18/236,486.
Claims priority of application No. 111131736 (TW), filed on Aug. 23, 2022.
Prior Publication US 2024/0065765 A1, Feb. 29, 2024
Int. Cl. A61B 17/17 (2006.01); A61B 34/10 (2016.01); A61F 2/08 (2006.01); A61B 17/00 (2006.01); A61B 17/56 (2006.01); A61B 90/00 (2016.01)
CPC A61B 34/10 (2016.02) [A61B 17/1764 (2013.01); A61F 2/0805 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/564 (2013.01); A61B 2017/568 (2013.01); A61B 2034/102 (2016.02); A61B 2034/108 (2016.02); A61B 2090/064 (2016.02)] 2 Claims
OG exemplary drawing
 
1. A method of orthopedic treatment on a to-be-treated part of a bone of a patient, comprising steps of:
obtaining, by using a computer aided design (CAD) tool based on profile data that is related to the to-be-treated part, a model of a preliminary instrument that substantially fits the to-be-treated part;
obtaining, by using the CAD tool, a model of a patient specific instrument (PSI) based on the model of the preliminary instrument, the model of the PSI being adjustable to adapt to real conditions of the to-be-treated part;
producing the PSI based on the model of the PSI;
performing medical operation on the to-be-treated part, and then attaching the PSI to the to-be-treated part; and
after attaching the PSI to the to-be-treated part, adjusting the PSI such that the PSI is adapted to the real conditions of the to-be-treated part;
before attaching the PSI to the to-be-treated part, placing a pressure sensor on the to-be-treated part to detect pressure, and
obtaining a parameter that is related to the pressure, wherein the step of adjusting the PSI is to adjust the PSI based on the parameter;
wherein: the orthopedic treatment is total knee arthroplasty (TKA), and the to-be-treated part is a medial femoral condyle of a femur, a lateral femoral condyle of the femur and a proximal tibia of a tibia of a lower limb of the patient;
in the step of placing a pressure sensor is to place a flexible pressure sensor on the to-be-treated part to detect a first pressure related to the medial condyle and a second pressure related to the lateral condyle of the lower limb of the patient;
the step of producing the PSI is to produce the PSI to include a frame having a plurality of through holes and at least one pin;
the method further comprises, before the step of attaching the PSI to the to-be-treated part, steps of:
placing a first pad on the to-be-treated part such that the first pressure and the second pressure are balanced when the femur and the tibia of the lower limb of the patient are positioned in an extension state, and
placing a second pad on the to-be-treated part such that the first pressure and the second pressure are balanced when the femur and the tibia of the lower limb of the patient are positioned in a flexion state;
the step of adjusting the PSI includes selecting, based on the parameter that includes a thickness of the first pad and a thickness of the second pad, at least one of the through holes and inserting the at least one pin respectively into the at least one of the through holes, the at least one pin inserted into the at least one of the through holes being fastened to the to-be-treated part; and
the method further comprises, after the step of adjusting the PSI, a step of mounting a cutting guide on the to-be-treated part according to a position of the at least one pin fastened to the to-be-treated part.