What Is a Digital Wound Measurement Device?

A digital wound measurement device is a medical tool used to measure the size, depth, and sometimes the area of a wound. Unlike older methods that used rulers or paper tracing, digital devices record wound data electronically. The measurements can be stored, compared over time, and shared with healthcare teams.

Wound measurement has always been an important part of wound assessment. Knowing the exact size of a wound helps determine if it is healing, staying the same, or getting worse. Digital devices make this job more precise and remove guesswork.

Purpose and Where These Devices Are Used

The main purpose of a digital wound measurement device is to track how a wound changes over time. Accurate measurement helps in deciding the right treatment plan and checking if the current treatment is working.

Common Settings Where These Devices Are Used

• Hospitals and inpatient wards (surgical, burn, and pediatric units)
• Outpatient wound care clinics
• Emergency departments
• Home care and community nursing visits
• Rehabilitation centers
• Long-term care facilities
• Military and field medical units (portable versions)

Types of Wounds These Devices Are Used For

Types of Digital Wound Measurement Devices

Several types of digital wound measurement devices are available. Each works differently and is suited for different clinical settings.

How to Use a Digital Wound Measurement Device – Step by Step

The steps vary slightly depending on the type of device, but the general process is as follows. Always follow the specific manufacturer's instructions for the device being used.

Before You Start – Preparation

1. Wash hands thoroughly with soap and water, or use an alcohol-based hand rub.
2. Wear clean gloves. If the wound is open or infected, use sterile gloves.
3. Gather all necessary items: the device, a clean reference scale or sticker (if needed), wound documentation form or digital record.
4. Position the person comfortably. The wound area should be fully visible and well-lit.
5. If a wound dressing is present, remove it carefully following proper wound care protocol.
6. Gently clean the wound surface as instructed by the treating clinician before measurement, if required.

Step-by-Step: Using a Camera-Based or Smartphone Wound App

1. Open the wound measurement app or turn on the digital wound camera device.
2. Place a clean calibration sticker or reference scale flat on the skin beside the wound, not on it. This helps the app calculate real-world size from the photo.
3. Hold the camera or device perpendicular (at a 90-degree angle) directly above the wound. Avoid tilting, as this distorts measurements.
4. Ensure the entire wound is in the frame. Good lighting is essential – natural light or a clean white light works best. Avoid shadows over the wound.
5. Capture the image as directed by the device or app. Some devices auto-capture; others require pressing a button.
6. Allow the software to process the image. Most apps will automatically highlight the wound boundary. If manual tracing is required, trace carefully along the wound edge using the touchscreen.
7. Review the measurements displayed: length (longest point), width (widest perpendicular point), and wound area (if available).
8. For depth measurement, a sterile probe or swab may be used separately – insert gently at the deepest point and measure the mark against a ruler. Some 3D scanners measure depth automatically.
9. Save the measurement and image in the patient's digital record or print as required.
10. Re-dress the wound and dispose of gloves properly.

Step-by-Step: Using a Digital Ruler or Caliper Device

1. Switch on the digital device and check the battery level.
2. Hold the device flat along the longest part of the wound without pressing into the wound bed.
3. Read the digital display for the length. Rotate 90 degrees to measure the width at the widest point.
4. Record the measurements immediately in the clinical notes or device memory.
5. Clean the device tip with an alcohol wipe after use.

Precautions and Potential Risks

General Precautions

• Always use clean or sterile technique when working near an open wound.
• Never place the device directly into an open or infected wound unless it is designed for that purpose.
• Do not apply pressure on the wound while measuring.
• In children, always ensure the child is calm and still to prevent sudden movement that could injure the wound site.
• Use single-use reference stickers or clean the reusable ones properly between patients to prevent cross-contamination.
• Follow the manufacturer's infection control guidelines for the specific device.
• Ensure the device is calibrated and up to date. Uncalibrated devices give inaccurate readings.

Specific Risks to Know

Frequently Asked Questions (FAQs)

How to Keep the Device Safe and in Good Condition

Cleaning and Disinfection

• After each use, wipe the device surface with an alcohol-based wipe or the cleaning agent recommended by the manufacturer.
• Never submerge the device in liquid unless it is rated as waterproof. Check the IP (Ingress Protection) rating of the device.
• For devices with a camera lens, clean the lens gently with a microfibre cloth. Do not use rough cloths that may scratch the lens and affect image quality.
• In clinical settings, follow the facility's medical device disinfection protocol.

Storage

• Store in a clean, dry location away from direct sunlight and extreme heat or cold.
• Use the original case or a protective pouch when not in use.
• Keep away from moisture. Humidity can damage electronic components.
• Remove batteries if the device will not be used for a long period.

Battery and Software Maintenance

• Charge the battery fully before clinical use. Do not let the battery drain completely during a wound assessment session.
• Update the device software and app regularly. Software updates often improve measurement accuracy and fix bugs.
• Re-calibrate the device as per the manufacturer's schedule, especially after any physical impact or drop.

Calibration Checks

• Perform regular calibration checks using the reference tools provided by the manufacturer.
• If the device has been dropped or shows inconsistent readings, do not use it on patients until recalibrated or serviced.
• Record calibration dates and keep a log as required in clinical settings.

Recording and Using Measurement Data

Digital wound devices are most valuable when their data is properly documented and used. Here is how measurement data should be handled:

• Always record the date and time of each measurement alongside the values.
• Include measurement in wound care notes along with wound location, wound bed description, and treatment applied.
• Compare measurements over time – a wound that reduces in area by 20 to 30 percent in 4 weeks is generally considered to be healing well (as referenced in standard wound care guidelines).
• Secure photo storage: Wound photographs are sensitive medical data. They must be stored securely within an encrypted system and only shared with relevant healthcare personnel following local data protection regulations.
• Export and share safely: Most systems allow export to electronic health records (EHR). Always follow the data handling policy of the institution.

Special Considerations for Use in Children

When measuring wounds in pediatric patients (children), certain factors need extra attention:

• Cooperation: Children may move during the procedure. A calm, distraction-based approach helps. A parent or guardian can help keep the child still.
• Pain and anxiety: Ensure the measurement process is as quick and non-threatening as possible. Non-contact camera-based methods are preferred in children.
• Skin fragility: Children's skin, especially in neonates and infants, is thinner and more delicate. Avoid pressing any device near the wound.
• Documentation: For children, include age and weight in the wound record as these affect healing rate expectations.
• Parental consent: Photographs of wounds in children should only be taken with appropriate consent as per local legal and institutional requirements.

Availability and Regulation

Digital wound measurement devices are available internationally. They are classified as medical devices in most countries and are subject to regulatory approval before sale and clinical use.

Always confirm that the device used carries the relevant regulatory approval for the country or region it is being used in. Using non-approved devices in clinical settings is not recommended.

Suggested References and Resources