Short-term Effect of Podiatric Callus Debridement on Plantar Pressure in Diabetic Neuropathic Patients

July 13, 2024 updated by: Joanne Tze Yan LAI, Chinese University of Hong Kong
Diabetes peripheral neuropathy (DPN) affects up to 50% of the diabetes population. In the diabetic neuropathic foot, it commonly manifests as loss of protective sensation, foot deformity and skin dryness. Alongside with day-to-day weightbearing activities, this can lead to formation of callus over plantar pressure points. Studies have proven that callus formation leads to high plantar pressure and increased risk of diabetic foot ulcers. For podiatrists, diabetic foot screening and treatment is our daily practice. Plantar callus are commonly treated by sharp debridement to relief pressure from the hard skin build up and thus reducing the risk of ulceration. However, the effectiveness of callus sharp debridement is not commonly studied in researches. Only a few studies in the past evaluated the effectiveness of callus treatment by different outcome measurements. Among those studies only 2 were specifically done in diabetic patients, in which one reported results of diabetic neuropathic patients. All the available studies used peak plantar pressure only as their pedobarographic outcome measure. In this study, the treatment effect of podiatric sharp debridement of callus in diabetic neuropathic patients will be evaluated using a range of pedobarographic parameters and Foot and Ankle Outcome Score (FAOS) questionnaire. The immediate and short-term (3-4 weeks) effect of sharp debridement in DPN patients with callus could be quantified. Change in loading pattern could also be analysed based on different areas of the foot.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
16

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Hong Kong
      • Hong Kong, Hong Kong
        • Podiatry Department, Princess Margaret Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age 18 or older
  2. Active out-patient status in Podiatry department of Princess Margaret Hospital
  3. Men and women
  4. Ambulatory
  5. Diagnosis of type I or II diabetes
  6. Failed peripheral neurological assessment (Vibration perception threshold >25 volts or unable to detect one or more sites of 4-point 10g Semmes-Weinstein monofilament test)
  7. Presence of plantar callus
  8. Compliance with instructions (in Chinese or english)
  9. Ability to read and write (in Chinese or english)

Exclusion Criteria:

  1. Peripheral vascular disease
  2. Painful neuropathy
  3. Charcot deformity
  4. Undergone any form of callus debridement in the past 6 weeks
  5. Active foot ulcer
  6. Any dermatological condition other than callus that causes hyperkeratosis (e.g. verruca pedis, eczema, tinea pedis)
  7. Any musculoskeletal condition that affects balance and gait
  8. Allergic to chlorhexidine gluconate or alcohol

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Callus debridement
Callus debridement which aligns with routine clinical practice of the Princess Margaret Hospital Podiatry Department.
Procedure: Callus debridement
Eligible patients will be seated on a podiatry couch. Standard skin preparation procedure will be done with 2% Chlorhexidine gluconate in 70% isopropyl cleansing to all areas of feet. The same researcher will perform sharp debridement in all participants to minimize the variance between procedures. The procedure will comply with Infection Control Guideline (Podiatry) . A sterile scalpel handle loaded with a single-use No. 15 blade will be used to carry out sharp debridement using aseptic technique. Hyperkeratotic tissue will be debrided until smooth transition with adjacent skin is achieved and underlying pinkish normal skin is visible. Used scalpel will be unloaded and disposed by a QlickSmart ® BladeFLASK scalpel blade remover.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Peak plantar pressure (PPP) (unit: kPa)
Time Frame: Before treatment, immediately after treatment and 3-4 weeks post-treatment
The maximum or highest pressure within foot
Before treatment, immediately after treatment and 3-4 weeks post-treatment

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Pressure time integral (PTI) (unit: kPa*sec)
Time Frame: Before treatment, immediately after treatment and 3-4 weeks post-treatment
The amount of pressure relative to the time that the pressure is present
Before treatment, immediately after treatment and 3-4 weeks post-treatment
Peak pressure gradient (PPG) (unit: kPa/cm)
Time Frame: Before treatment, immediately after treatment and 3-4 weeks post-treatment
Spatial change in pressure around location of the peak pressure
Before treatment, immediately after treatment and 3-4 weeks post-treatment
Forefoot to rearfoot peak pressure ratio (F/R ratio)
Time Frame: Before treatment, immediately after treatment and 3-4 weeks post-treatment
Forefoot to rearfoot peak plantar pressure ratio
Before treatment, immediately after treatment and 3-4 weeks post-treatment
Foot and Ankle Outcome Score (FAOS)
Time Frame: Before treatment, 1 week after treatment and 3-4 weeks post-treatment
Patient-reported outcome measurement (PROM) tool that is calculated using 42 Likert scale questions which are organised into 5 sub-categories: symptoms, pain, activities of daily living (ADL), sports and quality of life (QOL)
Before treatment, 1 week after treatment and 3-4 weeks post-treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Chinese University of Hong Kong

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Princess Margaret Hospital, Hong Kong

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Samuel Ka-Kin Ling, Assistant Professor (Clinical) of Orthopaedics & Traumatology

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 23, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 30, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 30, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 5, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 5, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 10, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 16, 2024

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 13, 2024

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2024

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CREC2023.572

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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