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Evaluation Of Pressure Distribution Of Kyboot
Shoes In Comparison To Other Foot Wear In
Diabetic Patients And In Healthy Subjects
Dr. Simon Levy, Yael Dotan-Marom, Miri Rosenhouse, Dr. Sigal Portnoy, Dr. Itzhak Siev-Ner.
Department of Orthopedic Rehabilitation, Sheba Medical Center, Tel Hashomer
Department of Medical Professions, University of Tel Aviv
Department of Physiotherapy, Sheba Medical Center, Tel Hashomer
Disclosure
• The Orthopedic Rehabilitation Department, Tel Hashomer Hospital received
funding for this study by the Kybun company
• Our department initiated this study and we were solely responsible for the study
design, choice of patients, conduct of the study and outcome without the
influence of any third party.
Introduction
• Every 30 seconds a limb is lost due to diabetes
• The amputations are preceded by a foot ulcer in 84% of cases
• Therefore a reduction of mechanical pressure is important
• Ideal footwear for a diabetic patient decreases weight-bearing pressure and shear
forces
Introduction
• In this study we wanted to compare:
– The pressure distribution
– changes in the movement of the center of pressure
– Several gait parameters
of the KyBoot in comparison with normal shoes in healthy and diabetic subjects.
Methods
• Location: Sheba Medical Center, Orthopedic Rehabilitation Department
• 2 study groups
– Healthy volunteers (10)
– Diabetic patients (11)
Methods
Inclusion criteria for group 1 (healthy subjects):
– Signing of informed consent
– Intact cognitive function
– Healthy
Methods
Inclusion criteria for group 2 (diabetic subjects):
– Signing of informed consent
– Diabetes mellitus Type 2
– Existence of sensory neuropathy
– Intact cognitive function
Methods
Exclusion criteria for group 2 (diabetic subjects):
– An orthopedic or rheumatic disease that negatively influences range of
motion, strength, gait or balance
– Neurological diseases that influence proprioception , strength, balance,
cognitive function / understanding, vision
– Injury or disease that can influence normal gait
– Need for assistive devices : crutches, cane, walker
– Dialysis Treatment
– Foot Ulcer
– Major foot deformations necessitating fitting of specially fitted foot wear
Methods
• In-sole Pressure Sensors (Tactilus Human Interface Stretch System) recorded the
pressure distribution and changes in center of pressure inside the shoes.
• With the help of the GaitRite System we determined walking speed, length of
stride and step and several other gait parameters
• We took measurements in stance and walk
• The test subjects were asked to complete a questionnaire on comfort of wear,
feeling of pressure and pain
Results
The maximal average pressure was significantly reduced by an averaged 12.8% in gait
with Kyboot shoes
Results
The maximal contact area is significantly increased with KyBoot shoes
Results
• Movement of the Center of Pressure
The center of pressure moved significantly less in the medio-lateral axis (22% less)
and in the anterio-posterior axis (19%) with Kyboot shoes
Results
The maximal heel to forefoot pressure ratio decreased significantly by 58%
Maximal heel pressure decreased by 26 kpa and max. forefoot pressure by 35 kpa
The same diabetic patient, during stance, same foot, each after 10 s of standing:
Normal shoes
Kyboot shoe
Kyboot shoes
The step length increased significantly (3 cm) with Kyboot shoes
Subjective Questionnaire Results:
Results
Subjective Questionnaire Results:
Discussion
• KyBoot shoes reduce average pressure and distribute the pressure more effectively
than other shoes in gait  reduced risk of ulceration
• The step length is significantly increased with KyBoot shoes (propulsion without
increased pressure)
• KyBoot shoes could be beneficial for diabetic patients and in some cases could
offer an alternative to shoes provided by the Ministry of Health (Louis Institute)
• We do not suggest Kyboot shoes for diabetic patients with significant deformities
• KyBoot shoes reduce pain and improve comfort during stance and gait
Normal shoes
Kyboot shoes

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Evaluation Of Pressure Distribution of kybun Shoes

  • 1. Evaluation Of Pressure Distribution Of Kyboot Shoes In Comparison To Other Foot Wear In Diabetic Patients And In Healthy Subjects Dr. Simon Levy, Yael Dotan-Marom, Miri Rosenhouse, Dr. Sigal Portnoy, Dr. Itzhak Siev-Ner. Department of Orthopedic Rehabilitation, Sheba Medical Center, Tel Hashomer Department of Medical Professions, University of Tel Aviv Department of Physiotherapy, Sheba Medical Center, Tel Hashomer
  • 2. Disclosure • The Orthopedic Rehabilitation Department, Tel Hashomer Hospital received funding for this study by the Kybun company • Our department initiated this study and we were solely responsible for the study design, choice of patients, conduct of the study and outcome without the influence of any third party.
  • 3. Introduction • Every 30 seconds a limb is lost due to diabetes • The amputations are preceded by a foot ulcer in 84% of cases • Therefore a reduction of mechanical pressure is important • Ideal footwear for a diabetic patient decreases weight-bearing pressure and shear forces
  • 4. Introduction • In this study we wanted to compare: – The pressure distribution – changes in the movement of the center of pressure – Several gait parameters of the KyBoot in comparison with normal shoes in healthy and diabetic subjects.
  • 5. Methods • Location: Sheba Medical Center, Orthopedic Rehabilitation Department • 2 study groups – Healthy volunteers (10) – Diabetic patients (11)
  • 6. Methods Inclusion criteria for group 1 (healthy subjects): – Signing of informed consent – Intact cognitive function – Healthy
  • 7. Methods Inclusion criteria for group 2 (diabetic subjects): – Signing of informed consent – Diabetes mellitus Type 2 – Existence of sensory neuropathy – Intact cognitive function
  • 8. Methods Exclusion criteria for group 2 (diabetic subjects): – An orthopedic or rheumatic disease that negatively influences range of motion, strength, gait or balance – Neurological diseases that influence proprioception , strength, balance, cognitive function / understanding, vision – Injury or disease that can influence normal gait – Need for assistive devices : crutches, cane, walker – Dialysis Treatment – Foot Ulcer – Major foot deformations necessitating fitting of specially fitted foot wear
  • 9. Methods • In-sole Pressure Sensors (Tactilus Human Interface Stretch System) recorded the pressure distribution and changes in center of pressure inside the shoes. • With the help of the GaitRite System we determined walking speed, length of stride and step and several other gait parameters • We took measurements in stance and walk • The test subjects were asked to complete a questionnaire on comfort of wear, feeling of pressure and pain
  • 10. Results The maximal average pressure was significantly reduced by an averaged 12.8% in gait with Kyboot shoes
  • 11. Results The maximal contact area is significantly increased with KyBoot shoes
  • 12. Results • Movement of the Center of Pressure The center of pressure moved significantly less in the medio-lateral axis (22% less) and in the anterio-posterior axis (19%) with Kyboot shoes
  • 13. Results The maximal heel to forefoot pressure ratio decreased significantly by 58% Maximal heel pressure decreased by 26 kpa and max. forefoot pressure by 35 kpa
  • 14. The same diabetic patient, during stance, same foot, each after 10 s of standing: Normal shoes Kyboot shoe Kyboot shoes
  • 15. The step length increased significantly (3 cm) with Kyboot shoes
  • 18. Discussion • KyBoot shoes reduce average pressure and distribute the pressure more effectively than other shoes in gait  reduced risk of ulceration • The step length is significantly increased with KyBoot shoes (propulsion without increased pressure) • KyBoot shoes could be beneficial for diabetic patients and in some cases could offer an alternative to shoes provided by the Ministry of Health (Louis Institute) • We do not suggest Kyboot shoes for diabetic patients with significant deformities • KyBoot shoes reduce pain and improve comfort during stance and gait