What might the practitioner observe?

Which wavelengths appear to be absorbed?

The fresh blood in this example arrived during therapy for persistently cracked skin. A crack opened with a flow rather than the usual weeping action. After a few minutes, the bleeding response stopped and the cracking subsided.

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In the video, taken by a smartphone, observe how the darkness of the blood changes with the varying wavelengths. The possible stimulations change by the millisecond. (0:11)

The practitioner may observe subtle changes as the first indication that the therapy may be "working".

Images via the Instant Verification System

PhotoMed's Instant Verification System incorporates a 4K monochrome camera to capture subtle wavelength-dependent changes in wound features.

 
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Visibility of wound features at 625nm and 577nm recorded seconds apart. Images such as these provide a baseline for documenting fresh exudates. This foot ulcer later exuded clear materials. Wounds with a moist film of exudates often show fresh materials that appear dark at wavelengths shorter than about 600nm.

This video shows an earlier version of the Vari-Chrome Pro in action. This wound had been super-cleaned a few hours before the video was taken. The fresh exudates are clear. However, moist wounds covered by some exudates are more likely to exhibit fresh materials that appear darker in yellow, green, and blue wavelengths. The varying wavelengths may be useful for examining progress during standard debriding activities. (0:30)

 
 

Instant Verification System

The hi-def-4K wound camera documents previously unseen phenomena in non-healing wounds as the wound responds to photons from the Vari-Chrome Pro. Playback of recordings flexibly lets the examiner adjust image parameters to observe details that might have otherwise been lost. Integration with an added USB camera provides context for the observation of the unexpected phenomena.

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The shows a de-identified screen shot taken in the replay module. The Instant Verification System includes proprietary innovations, such as the presentation of the wavelength emitted by the Vari-Chrome Pro on the time bar. The regular patterns show the wavelength automatically varying across a limited range of wavelengths. This screen shot was taken when the wavelength was manually adjusted to 460nm. The “In” and “Out” show the time range for export of images from the wound camera and/or thermal imaging camera. Wavelength data is exported as a caption that may later be turned on or off.

 

Fresh exudates provide during-visit feedback?

Monochrome cameras with a wide range of sensitivity enable the recording of wounds features at different wavelengths. Color camera sensors and automated "color correction" present limitation to photographing wounds in color under different lighting conditions.

PhotoMed's development studies focused on improving sensory and motor function to relieve pain. Outcomes by patients who had non-healing wounds led to developing the 4k monochrome module of the Instant Verification System.

This example shows a non-healing wound that had a layer of exudates before receiving variable wavelength therapy. This handheld video shows changes in the wound over a 10-minute series of 3 treatments. (0:34)

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Field experience suggests that healing may resume without visible signs, such as when the wound is covered by a thick layer of exudates or when the wound has a dry cover.

The Instant Verification System includes the ability to make simultaneous video recordings from multiple cameras with different spectral characteristics.

The Instant Verification System may be configured with added USB cameras and the Vari-Chrome Pro for documenting wounds in small clinics.

 

Take the wound care specialist to the patient

Now patients living in at home, rural, or remote areas may have state-of-the-art wound care via telemedicine. The wound care specialist may now watch the restart of wound healing in real time. Their observations, via a smart phone link, might lead to saving limbs without the patient traveling to a specialty clinic.

Multi-spectral recordings of fresh exudates in moist wounds may confirm progress, or not. Healing may resume without an immediate visible marker.

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