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Provizio® SEM Scanner

Insight | Intervene | Document | Q&As


Image of the Provizio SEM Scanner, a medical device used for detecting early signs of pressure injuries, showing its digital interface and ergonomic design.
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What does it do?

Provizio SEM Scanner supports clinicians to identify specific anatomical areas at increased risk of pressure injury development on admission and 5 days* earlier than visual skin assessment1 regardless of skin tone.2 This allows targeted interventions to support reductions of pressure injury incidence across all healthcare settings.

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How does it work?

The inflammatory response to deformation is part of the damage cascade. Damage occurs at the cellular level before skin redness is visible. Sub-epidermal moisture (SEM) is one of the earliest signs of cell death. SEM is an established biomarker3 that the device identifies and reports as a SEM delta (∆) value.

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What does it mean?

A SEM delta (∆) value of ≥ 0.6 indicates increased risk of developing broken skin pressure injuries. Provizio SEM Scanner differentiates between healthy and inflamed tissue providing an objective and anatomically specific measure of pressure injury risk.4

1.Okonkwo H. et al. (2020). A blinded clinical study using a subepidermal moisture biocapacitance measurement device for early detection of pressure injuries. Wound Repair and Reg 2020;1-11.
2. Bates-Jensen, B. M., Mccreath, H. E. & Pongquan, V. (2009). Subepidermal moisture is associated with early pressure ulcer damage in nursing home residents with dark skin tones: pilot findings. J Wound Ostomy Continence Nurs, 36, 277-84.
3. Prevention and Treatment of Pressure Ulcers/Injuries: International Clinical Practice Guideline. (2019) (EPUAP, NPIAP, PPPIA)
4. Gershon, S. & Okonkwo, H. 2021. Evaluating The Sensitivity, Specificity And Clinical Utility Of Algorithms Of Spatial Variation In Sub-epidermal Moisture (SEM) For The Diagnosis Of Deep And Early-stage Pressure-induced Tissue Damage. J Wound Care, 30, 41-53.


When do I scan?

Scan every at-risk patient upon admission, throughout their stay and upon discharge on their heels and sacrum and record the SEM (∆) delta readings.

Patients should be scanned at least once a day, or according to your individual healthcare facilities protocols. Locations with higher acuity patients such as ICU may require more frequent assessment due to the potentially rapidly changing health status.

What should I do?

If a SEM delta (∆) value is ≥0.6 this indicates increased risk of developing a deep or early stage pressure injury. Preventive interventions should be implemented for the specific anatomy identified to be at increased risk according to the facility protocol to prevent further damage occurring and assist in reversing the current cellular damage.

If a SEM delta (∆) value is <0.6, this suggests the anatomy is at lower risk of pressure induced injuries. The anatomical area should continue to be monitored along with any changes in the patient that may warrant further observation.

Demonstration of how the Provizio SEM Scanner is used on different body parts to prevent pressure ulcers


Why document?

Scanning regularly and documenting the results allows tracking and management of patients heels and sacrum pressure injury risk during their period of care, whether as an inpatient, in the community or at home.
It enables the healthcare practitioner team to monitor the trend of the SEM values based on the preventive interventions implemented.

How to document

Patient SEM delta (∆) readings can either be manually documented on patient notes or charts or can be digitally documented using the Provizio SEM Scanner. When the device is put into the Charging Hub it will automatically transfer the patient data to the Gateway Dashboard for monitoring and reporting.

Gateway & EMR

The Gateway Dashboard enables healthcare practitioners to view patient SEM delta (Δ) readings by day, week, month or year, as well. As well as ward and facility level data. The data can also be exported to provide further reporting.

The Gateway Dashboard can be integrated with all major EMR (Electronic Medical Record) systems.

Further information is available on the Gateway Dashboard page.

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How does Provizio SEM Scanner support healthcare practitioners?

Provizio SEM Scanner identifies damage occurring at the cellular level before skin redness is visible1. This allows healthcare practitioners to implement anatomically specific pressure injury prevention earlier and the targeted interventions are designed to help prevent the pressure injury from progressing.

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How is Provizio SEM Scanner cost effective?

Pressure injury prevention via implementing Provizio SEM Scanner results in:

  • materials (e.g. dressings) cost savings5,6
  • frees up nursing time5,6
  • releases bed days5,6

5. Padula, W. V., et al. (2020). The cost-effectiveness of sub-epidermal moisture scanning to assess pressure injury risk in U.S. health systems. Journal of Patient Safety and Risk Management, 25, 147-155.
6. Gefen N, A., et al. (2020). Modelling the cost-benefits arising from technology-aided early detection of pressure ulcers. Wounds International, 11.

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Healthcare professional using the Provizio SEM Scanner on a patient’s heel to assess risk of developing pressure injuries.

How is Provizio SEM Scanner helping to eliminate health inequities?

Patients with dark skin tone:

  1. are almost four times more likely to die from pressure injury related causes than average7
  2. have a PI/U incidence rate 60% higher compared to white skin tone patients8
  3. have a higher probability of suffering the worst stage of pressure injuries (Stage II-IV) with broken skin9
  4. are more likely to have multiple pressure injuries than white skin tone patients9

Skin redness is currently the standard of care to visually diagnose a pressure injury, this is particularly challenging in patients with dark skin tones. Provizio SEM Scanner supports healthcare practitioners to reduce health inequities due to its skin tone agnostic mode of action.
7. Redelings, M. D. et al. (2005). “Pressure ulcers: more lethal than we thought?.” Advances in Skin & Wound Care vol. 18,7 (2005): 367-72.
8. Baumgarten, M. et al. (2004). “Black/White differences in pressure ulcer incidence in nursing home residents.” Journal of the American Geriatrics Society vol. 52,8 (2004): 1293-8.
9. Gunowa, N. et al. (2018). “Pressure Injuries in People with Dark Skin Tones: A Literature Review.” Journal of Clinical Nursing, vol. 27, (2018), pp. 3266-75.

Healthcare professional using the Provizio SEM Scanner on a patient’s heel to assess risk of developing pressure injuries.
Provizio SEM Scanner displayed with its unique, ergonomic design for easy handling.

Discover how you can implementProvizio® SEM Scanner in your facility

Contact Arjo, our exclusive Global Distributor

Alternatively, get in touch with Bruin Biometrics
[email protected]

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