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Visitrak is a portable digital device that provides accurate, reproducible
data for tracking wound progress. By providing a standardised approach to
wound measurement, it promotes best practice in wound management.


There are three components to the wound measurement device, these are:

Visitrak Digital

The convenient and portable digital tablet is easy to handle, providing a quick, convenient and accurate area measurement. When the clinician has completed the tracing, the device emits an audible beep. The immediate default result is wound area, but functions are also provided to allow calculation of percentage wound area that is necrotic, and width and length measurements.

 Visitrak Digital         
Visitrak Grid
The tracing film for use with the Visitrak device has been specially designed as a three-layer pack to minimise the risk of cross-contamination and secondary infection. The patient contact layer is sterile, and the clean layer used to record wound measurements can be stored in patient records. The conformable film is easy to draw on and transparent, making it easy to see the wound through the film.  Visitrak Grid             
Visitrak Depth
The disposable depth indicator is sterile and convenient allowing for easy measurement of wound depth.  Visitrak Depth  

Below is an illustration of Visitrak. Mouse over different parts of the
device for more information.





Visitrak has a number of benefits, including accuracy, flexibility, simplicity and reassurance.

Why track wound progress?
Systematic assessment of a patient's wound is one of the most important
means of optimising their chances of wound closure. By gathering information
about the wound over time, a realistic and clearly defined management plan
can be agreed upon. 1


It has been shown that early identification of wounds that are not responding
to treatment ensures the best possible outcome. This is because as the
treatment regime is re-evaluated, more appropriate interventions can be
initiated as necessary. 1


The more accurately the rate of wound healing is documented, the faster
non-responsive wounds will be identified. There is now considerable
published evidence that accurate percentage reduction in wound area is a
useful measurement within the first few weeks of treatment. 1
Specifically, a percentage area reduction of less than 20-40% over the first
two to four weeks is a reasonable indicator that the wound is showing a low
response to the treatment. 1


There are many methods of tracking wound progress. These include
length and width measurements and counting grid squares. However,
the most accurate method is to measure changes in precise wound area.


Test the Techniques

Using the drop down menu below, try the different measurement techniques and compare results. After trying each one, your results will be recorded.
You can view the 'see correct answer' to view the actual wound area.

Effective monitoring can shorten the duration and cost of inappropriate
treatment, and will ultimately save nurse time. In addition, wound assessment
can reassure the clinician and the patient that the current treatment is working.

For more information about the importance of wound assessment, please
visit Global Wound Academy.


Code Product Description Min. order unit
66000850 Visitrak Digital Electronic wound
measurement device
1 unit (1 device)
66000851 Visitrak Grid Wound tracing grid 1 unit (box of 50)
66000852 Visitrak Depth Wound measurement
depth indicator
1 unit (box of 50)


For references throughout, please see the Evidence tab.  

Instructions for Use

 Instructions for Use



Visitrak in 5 simple steps:


1. Trace round the wound on the Visitrak Grid.

 Trace the wound









2. Remove the backing layer from Visitrak Grid.

 Remove backing layer



3. Attach the Grid to Visitrak Digital.

 Attach the grid



4. Re-trace the wound shape using the attached stylus until you hear the completion ‘beep'. Precise wound area is calculated for you.

 Re-trace the wound



5. Now choose from other options, for example percentage calculation of necrotic tissue.

 Calculate wound dimensions or percentage of necrotic tissue



Visitrak Videos:

A short video clip (5min 28seconds) showing real-life useage is available in the following formats:


Description Size


56k Dial Up Connection 4.4mb

View >

Broadband 19.3mb View >
Download (Zip file. Save & unzip) 9.6mb

Download >      



For full instructions, please refer to the VisitrakDigital User Guide





Technical FAQs >


Clinical and General FAQs



1. Q: Why should I not perform length x width measurements?
  A: This is not an accurate method for measuring area, as the area calculated would be for a symmetrical shape and most wounds are asymmetrical. In addition, it has been found that the accuracy of length and width measurements decreases with increasing wound size.



2. Q: What is the point of measuring wound areas?
  A: Effective monitoring of wound progress is crucial since it can shorten the duration and therefore the cost of inappropriate treatment for those that are not responding to current treatment. In addition, wound assessment can reassure the clinician and patient that the current treatment is working, which in turn can improve patient compliance.



3. Q: What wounds can be measured with Visitrak?
  A: All types of acute and chronic wounds (smallest wound size 1.2cm 2).



4. Q: Is it sterile?
  A: The patient contact layer is sterile within the sealed area. It is important that this area is not touched to prevent contamination of the wound.



5. Q: How accurate is it?
  A: Visitrak provides a true area measurement, which is more than 98% accurate. Length and width measurements are also more that 98% accurate.



6. Q: How can you clean the Visitrak Digital and Grid?
  A: The Grid is not to be cleaned as it is for single-use only. The cleaning procedure for the Visitrak Digital, stylus and coversheet should be in accordance with standard infection control procedures or as below:
  1. Wipe down all device surfaces using a damp soft cloth and a low level disinfecting solution.
  2. Dampen another soft cloth with clean water and use this to wipe down all surfaces to remove the disinfecting solution.
  3. Dry with a separate cloth.
    Do not immerse any part of Visitrak or use a dripping wet cloth for cleaning.
    Do not sterilise the Visitrak Digital or stylus, damage and destruction may result.
    Do not use plastic solvents or abrasive cleaners.
Care should be taken to ensure that moisture does not seep into the electrical components of the unit or stylus.



7. Q: Is the indicator sterile?
  A: Yes, Visitrak depth indicator is sterile if its packet is intact before opening.



8. Q: Which side of the Grid should be applied to the wound bed?
  A: After the backing paper has been removed, place the sealed area of the grid onto the wound, face up, so the numbers and the words are legible.



9. Q: What should you do if a patient is admitted with other dressings or antimicrobials already applied?
  A: Remove the dressing from the wound, so the wound edge is visible through Visitrak Grid. It is recommended that the wound be cleaned in accordance with local procedures, before Visitrak Grid is applied.



10. Q: The grid steams up when I'm tracing the wound, is this normal?
  A: Yes, in fact by following the steamed up area it actually helps you get better delineation of the wound margin.



11. Q: Sometimes light reflects off the grid surface making it difficult to see, can this be prevented?
  A: Yes, position of the light source and patient are important factors when taking any wound assessment. They contribute to the consistency of results obtained, always have the patient in the same position, or as close as possible, when taking measurements. Always perform tracings with a good light source. Use a lamp if possible but position it at an angle so the light does not shine directly onto the film surface, thus reducing glare.



12. Q: I receive free grids, why pay?
  A: Traditional tracing grids do not give you the accuracy required to identify responses to treatment unless you invest a large amount of time in analysis, consider the time to accurately determine area from counting squares. Additionally conventional grids do not allow you to calculate the necessary other wound parameters - refer to competitor section.

Technical FAQs >



Wound Tracing




Visitrak Digital






Below are references for wound assessment. The table below details the paper and author and which benefits the paper covers.


1 Wound Measurement: can it help us to monitor progression to healing? M.Flanagan (2003) Wound Assessment helps to determine healing over time...

Problems with competitors...

Percentage area reduction is a better indicator than absolute area reduction...

Length by width is not a good method of calculating wound area...

More >

2 Wound healing assessment using 20mhz ultrasound and photography M.Dyson, S.Moodley, L.Verjee, W.Verling, J.Weinman, P.Wilson (2003) Problems with competitors...

Accurate assessment is highly important...

More >

3 Determinants and
estimation of healing
times in diabetic
foot ulcers
S.Zimmy, H.Schatz, M.Pfohl (2002) Wound Assessment helps to determine healing over time...

Estimates wound healing time...

More >

4 A Comparison of computer-assisted and manual wound size measurement H.A Thawer, P.E Houghton, M.G Woodbury, D.Keast, K.Campbell (2002) Problems with competitors...

Estimates wound healing time...

Accurate assessment is highly important...

More >

5 A multicentre study of percentage change in venous leg ulcer area as a prognostic index of healing at 24 weeks J.Kantor, D.J.Margolis (2000) Wound Assessment helps to determine healing over time...

Percentage area reduction is a better indicator than absolute area reduction...

Estimates wound healing time...

More >

6 Photographic assessment of the appearance of chronic pressure and leg ulcers P.E Houghton, C.B.Kincaid, K.E Campbell, M.G Woodbury, D.H Keast (2000) Wound Assessment helps to determine healing over time...

Accurate assessment is highly important...

More >

7 A practical framework for wound assessment 2: methods M.Flanagan (1997) Wound Assessment helps to determine healing over time...

Problems with competitors...

Accurate assessment is highly important...

More >

8 Methods of measuring wound size: A comparative study P.Plassmann, J.M.Melhuish, K.G.Harding (1994) Problems with competitors...

Accurate assessment is highly important...

More >