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A Comparison of Insoles Used to Prevent Neuropathic Diabetic Foot Ulceration

2014-08-27 03:18:29 | BioPortfolio

Summary

Importance of the topic:

Lower extremity amputation is a costly complication of diabetes for both the NHS and the patient. Amputation may be avoided if the preceding foot ulceration can be prevented. One method of reducing the risk of ulceration in the neuropathic foot is through the provision of therapeutic insoles. The type of insole prescribed (prefabricated verses custom made) is currently based on anecdotal evidence. The idea held by many practitioners that the custom made insole is superior in its effect remains speculation, unsupported by the evidence. In the absence of economic analysis, the available data suggests that the custom insole is substantially more expensive to the NHS. This study, to determine which of two types of insole used in therapeutic shoes reduces peak pressure more in the at−risk diabetic foot, is therefore a very important topic and will provide both useful evidence for the NHS podiatry services. It is of course also very important for patients with diabetes as the personal suffering of those undergoing amputation is immense.

The study is a single blind randomised controlled trial comparing custom made with 'off the shelf' insoles.

Description

Aim The study compared custom-made functional insoles with prefabricated insoles for the preventative management of neuropathic diabetic feet, assessing effects on peak pressure, forefoot pressure time integral, total contact area, forefoot rate of loading, duration of load as a percentage of stance, quality of life, perceived foot health and cost.

Method Pilot work investigating the physical properties of materials used to fabricate insoles informed material selection. A single-blind randomised control trial recruited 119 neuropathic participants with diabetes from two Primary Care Trusts and randomly allocated them to either custom-made functional insoles or prefabricated insoles. Data was collected at issue and 6-month follow-up, using the F-scan in-shoe pressure measurement system. Patient perceptions were assessed with the Bristol Foot Score and Audit of Diabetes Dependant Quality of Life. Further analyses were carried out on two subgroups; 1) insole effect on peak pressure in 44 participants with pronated feet, over a 6-month follow-up period; 2) insole durability, investigated in a second subgroup of 60 participants for 12-months. Durability was evaluated in terms of change in insole thickness and reduction in peak pressure.

To increase the robustness of results, data analysis was calculated using three strategies; 1) pure intention-to-treat analysis, including all 119 participants randomised to an intervention; 2) intention-to-treat analysis, using all available data; 3) as-treated analysis, including those participants self-reporting full insole compliance, defined as 60% or more daytime wear.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Prevention

Conditions

Diabetes

Intervention

Insole

Location

Liskeard Community Hospital
Liskeard
Cornwall
United Kingdom

Status

Completed

Source

University of Plymouth

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:18:29-0400

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Urination of a large volume of urine with an increase in urinary frequency, commonly seen in diabetes (DIABETES MELLITUS; DIABETES INSIPIDUS).

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The state of PREGNANCY in women with DIABETES MELLITUS. This does not include either symptomatic diabetes or GLUCOSE INTOLERANCE induced by pregnancy (DIABETES, GESTATIONAL) which resolves at the end of pregnancy.

Excessive thirst manifested by excessive fluid intake. It is characteristic of many diseases such as DIABETES MELLITUS; DIABETES INSIPIDUS; and NEPHROGENIC DIABETES INSIPIDUS. The condition may be psychogenic in origin.

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