Study On Foot Mechanics And Protective Insoles Of Patients With Diabetic Toe Amputation

Foot ulcer is one of the complications with high incidence in diabetic patients,and its incidence is increasing year by year in my country.Once diabetic patients develop ulcers,the risk of further deterioration of the wound is very high,which is very likely to lead to further amputation or even death of the patient.Corresponding decompression of the wound area is an important measure to treat and prevent the further deterioration of foot ulcers.Therefore,it is very important to design protective aids for the feet of diabetic patients.This paper mainly studies the plantar pressure characteristics of diabetic toe amputation patients.And optimized foot decompression insole suitable for diabetic toe amputation patients is designed.The subjects included 28 patients with diabetic anemia(DM),25 patients with diabetic foot disease(DF),30 healthy individuals(NC),and 4 patients with diabetic amputation(DF1-4).First,the plantar pressure was collected,and the plantar pressure and impulse percentage were analyzed according to the experimental.The peak plantar pressure and impulse percentage of subjects in DM group and DF group were significantly higher than those in NC group.At the same time,the distribution of plantar pressure in diabetic patients after toe amputation was also significantly shifted to the forefoot.bear a greater load.A healthy adult volunteer was selected to obtain MRI images of his feet and complete the construction of finite element models of healthy feet,non-diabetic amputations and diabetic amputations,and verified the validity of the models.The finite element model was used to analyze the plantar pressure,bone stress,ligament and plantar fascia in diabetic toe amputation patients.The analysis showed that the plantar pressure and metatarsal area stress of diabetic toe amputation patients were higher than those of non-diabetic amputation patients,and the amputation patients would experience greater plantar pressure near the amputation area.Summarize the conclusions of the above experiments and finite element analysis,optimize the design of the removable plug insole,and conduct preliminary verification through the finite element method.The results show that for diabetic toe amputation patients,filling a plug with an appropriate thickness in the high-pressure area of the plantar can reduce the pressure in this area,and filling a 2mm plug can achieve better decompression effect than filling a 3mm plug.At the same time,the full-contact insole combined with the removal of the plug-in insole can achieve a 10%-20% decompression effect on the forefoot and hindfoot of patients with diabetic toe amputation.