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Diabetic Pressure Ulcer

Case Study: Diabetic Ulcer Treated with F-Scan

A diabetic patient with a long term non-healing ulcer under the left midfoot (Charcot Joint) is successfully treated with the F-Scan® system and the F-Mat™ floor mat.

By Jayne Arlett,

BSc Pod Med, FASMF, FAAPSM

 

Diabetic Ulcer Treated with Proper Footwear and Orthotic Prescription

 

A diabetic patient with a long term (15 months) non-healing ulcer under the left midfoot (Charcot Joint) was presented to private practice. The F-Scan®plantar pressure analysis system and the F-MatTM floor mat were used to assist the podiatrist and the patient to achieve optimal treatment outcomes. The ulcer site healed within one month of orthotic modification with the assistance of the F-Scan. More importantly, the patient was significantly more compliant with recommended treatments once he could visualize the extremely high and abnormal pressures that his ulcer site was generating while walking barefoot on the F-Mat. The F-Scan's ability to demonstrate to the patient the importance of footwear and orthotic therapy in this case perhaps outweighs the assistance that it gave to the podiatrist in maximizing treatment outcomes.

 

Presented below are F-Mat pressure profiles of barefoot walking showing peak pressure over ulcer site, and F-Scan pressure profiles showing reduction in pressure with orthotic and footwear. You can also download a free foot pressure eBook with a collection of case examples using foot pressure measurement to treat in real clinical settings.

 

Diabetic Ulcer Before Orthotic

 

Pressure Profile Before Orthotic

 

 

F-Mat Screening - Before Orthotic

To the left is a barefoot F-Mat pressure profile showing peak pressures over the ulcer site (arrow) and the 1st MTPJ of the left foot. The peak pressure over the ulcer site is 6.8kg/cm2 (102 psi).

 

 

F-Scan - Before Orthotic Modifications

To the right is the left pressure profile for in-shoe with orthotic before modifications. The pressure over the ulcer site is reduced compared with barefoot; however, the ulcer is still present. The peak pressure has reduced to 4.2kg/cm2 (60 psi).

 

 

 

 

 

F-Scan - After Orthotic

To the left is the left pressure profile for in-shoe with modified orthotic. The pressure over the ulcer site is reduced even further to 2.6 kg/cm2 (37 psi) and after 3 weeks of wear, the ulcer has healed completely. The orthotic was modified "on-the-spot" with the assistance of the F-Scan to allow for immediate feedback on the suitability of the modification.

 

 

 

Peak Pressure versus Time Curve - After Orthotic

The blue curve shows the peak pressure versus time before the orthotic was modified. The red curve shows peak pressure versus time for in-shoe with modified orthotic. Clearly the magnitude of peak pressure with the new modified orthotic is much lower than before the orthotic was modified. This significant reduction in peak pressure has assisted in the healing of the ulcer.

 

 

 

 

 

 

Typical Pressure Sensor Model(s) Used for Prescribing and Evaluating Orthotics

  • Sensor Model 3000
    Sensing Area Total
    Width Height Sensels Sensel Density
    4.2  in 12  in 954 25  in2
    106.7  mm 304.8  mm 954 3.9 cm²
  • Sensor Model 3100
    Sensing Area Total
    Width Height Sensels Sensel Density
    18.48  in 12.54  in 2128 9.2  in2
    469.4  mm 318.5  mm 2128 1.4 cm²

View all of Tekscan's Pressure Sensors