Press release neoplas tools GmbH

The world’s first placebo-controlled clinical trial proves the successful application of cold plasma jet kINPen^® MED in diabetic foot ulcers: Reactivation and acceleration of wound healing scientifically confirmed

Greifswald/Bad Oeynhausen, July 22nd, 2020. Chronic wounds resulting from diabetic foot syndrome heal significantly faster if the standard therapy is complemented with atmospheric cold plasma treatments. This has now been successfully proved by scientists in the first placebo-controlled, randomised and patient-blinded clinical trial. The study device used was the kINPen^® MED plasmajet of neoplas tools, a joint development with the Leibniz Institute for Plasma Science and Technology e. V. (INP). The study results have now been published in the Journal of the American Medical Association (JAMA Network Open).[1]

Around 900,000 Germans suffer from chronic wounds, i.e. wounds that do not heal or show impaired wound healing.[2] One of the most frequent causes of chronic wounds is the diabetic foot ulcer (DFU). Diabetes or DFU account for 70 percent of all amputations performed in Germany every year.[3] Moreover, the treatment of chronic wounds results in high health care costs of around 10,000 EUR per year and patient.[4]

Case reports and laboratory tests have been suggesting for years that the application of cold atmospheric plasma (CAP) can stimulate the healing process of chronic wounds, supporting a faster wound closure. This effect has now been clinically demonstrated for the first time in a clinical trial performed by physicians and scientists at the Herz- und Diabeteszentrum NRW (HDZ NRW; University Hospital for the treatment of cardiac, vascular and diabetic diseases of the Ruhr University of Bochum, Bad Oeynhausen, Germany), and at the Klinikum Karlsburg (medical centre for cardiac and diabetic diseases, Karlsburg, Germany). This first-of-its-kind randomised, placebo-controlled and patient-blinded study investigated the treatment of 62 DFS wounds in 43 hospitalised patients with adjuvant cold plasma therapy. These DFS wounds had a severity of 1B and 2B in accordance with the Wagner Armstrong Classification, and had not shown any tendency to heal for a minimum of three weeks despite standard wound therapy in an outpatient setting.

The wounds were randomised into two groups of 31 wounds each (with patients with several wounds potentially being randomised both into the test and the control group). In the test group, the wounds were treated 8 times within the course of 14 days with cold plasma from the kINPen^® MED plasmajet (30 seconds per cm² of wound surface), in addition to the standard wound therapy. The control group received a treatment with a simulated, inactive plasma (placebo). Primary study endpoints were the reduction of wound surface after 14 days of treatment and the reduction of the infection status and microbial load of the wounds. Secondary endpoints were e.g. the time to 10 % wound closure, the health-related quality of life and the safety and tolerability of the treatment.

Wound surface healing increased by 55 percent
After the 14 days of treatment the surface of the wounds treated with the cold plasma had reduced by an average of 69.5 percent. The average reduction in the placebo group was 44.8 percent. This means that the amount of wound surface closed under cold plasma treatment was 55 percent higher than the amount closed under the standard treatment alone. This is a statistically significant result (p=0.03). The plasma treatment was painless and well tolerated. None of the study patients experienced any plasma therapy related side effects throughout the course of the treatment. The patients will be kept under observation for five more years for an assessment of the long-term safety of the treatment.

[1] Stratmann B, Costea T-C, Nolte C, et al.: Effect of cold atmospheric plasma therapy vs standard therapy placebo on wound healing in patients with diabetic foot ulcers: a randomized clinical trial. JAMA Network Open. 2020;3(7):e2010411. doi:10.1001/jamanetworkopen.2020.10411

[2] Abschlussbericht der Forschungsgruppe Primärmedizinische Versorgung (PMV): Epidemiologie und Versorgung von Patienten mit chronischen Wunden (Final report of the Primary Medical Care (PMV) research group: Epidemiology and Treatment of Patients with Chronic Wounds), 2016. Berlin, 2016. https://www.bvmed.de/download/pmv-zusammenfassung-der-ergebnisse

[3] Morbach S et al.: Diabetisches Fußsyndrom (Diabetic Foot Syndrome). Diabetologie 2017; 12 (Suppl 2): S181–S189 (DOI https://doi.org/10.1055/s-0043-115979)

[4] Purwins S et al.: Cost‐of‐illness of chronic leg ulcers in Germany. Int Wound J. 2010 Apr;7(2):97-102 (DOI: https://doi.org/10.1111/j.1742-481x.2010.00660.x)

“The important study results of the kINPen^® MED plasmajet represents a major milestone in the clinical development of cold plasma technology,” Ulrike Sailer, managing partner of neoplas tools GmbH, is pleased to note. “Today, with its pinpoint plasma beam and controlled plasma quality, our kINPen^® MED plasmajet already offers doctors and hospitals a precise and effective treatment of wounds, especially in the presence of recesses and cavities as frequently experienced in connection with the diabetic foot ulcer. We will continue our work on technological high-precision solutions – and thus on the future development of plasma medicine – together with our long-standing research partner INP, under the leadership of Prof. Dr. Klaus-Dieter Weltmann.”

Cold plasma effect activates wound healing
With regard to the end points “infection status” and “reduction of microbial load”, a bigger reduction was measured in the plasma group compared to placebo. However, the differences between the two groups was not statistically significant, as Prof. Dr. Dr. Diethelm Tschoepe, medical director of the diabetes centre of the Herz- und Diabeteszentrum NRW and principal study investigator illustrates: “All wounds were treated with the standard therapy, including wound disinfection and debridement prior to the plasma therapy, plus systemic antibiosis as required. This initial treatment regimen – applied in both groups – explains why it was not possible to demonstrate the statistically significant antimicrobial effect of cold plasma as proven in other studies.” The results support the findings of many scientific INP publications. According to PD Dr. Stratmann’s interpretation of the study results, “atmospheric cold plasma has its own individual effect that activates wound healing. This effect cannot be explained by the antimicrobial effect of the plasma alone.”

Shorter hospitalisation periods for DFS patients
The study investigated patients in an inpatient setup. Patients are usually hospitalised for the treatment of DFU if the wounds do not heal despite standard treatment under everyday life conditions. However, every hospitalisation also involves increased treatment costs and considerable limitations for the patients. According to Prof. Dr. Dr. Diethelm Tschoepe, “faster wound healing potentially leads to an earlier discharge of patients from the hospital. As a result, cold plasma treatments may not only benefit future patients, but they may also have an added economic relevance for the health system.”

Study references:
Bernd Stratmann, PhD; Tania-Cristina Costea, MD; Catharina Nolte, MD; Jonas Hiller, MD; Jörn Schmidt, MD; Jörg Reindel, MD; Kai Masur, PhD; Wolfgang Motz, MD; Jürgen Timm, MD; Wolfgang Kerner, MD, Diethelm Tschoepe, MD: Effect of Cold Atmospheric Plasma Therapy vs Standard Therapy Placebo on Wound Healing in Patients With Diabetic Foot Ulcers. JAMA Network Open; 2020;3(7):e2010411. DOI: 10.1001/jamanetworkopen.2020.10411

[1] Stratmann B, Costea T-C, Nolte C, et al.: Effect of cold atmospheric plasma therapy vs standard therapy placebo on wound healing in patients with diabetic foot ulcers: a randomized clinical trial. JAMA Network Open. 2020;3(7):e2010411. doi:10.1001/jamanetworkopen.2020.10411

[2] Abschlussbericht der Forschungsgruppe Primärmedizinische Versorgung (PMV): Epidemiologie und Versorgung von Patienten mit chronischen Wunden (Final report of the Primary Medical Care (PMV) research group: Epidemiology and Treatment of Patients with Chronic Wounds), 2016. Berlin, 2016. https://www.bvmed.de/download/pmv-zusammenfassung-der-ergebnisse

[3] Morbach S et al.: Diabetisches Fußsyndrom (Diabetic Foot Syndrome). Diabetologie 2017; 12 (Suppl 2): S181–S189 (DOI https://doi.org/10.1055/s-0043-115979)

[4] Purwins S et al.: Cost‐of‐illness of chronic leg ulcers in Germany. Int Wound J. 2010 Apr;7(2):97-102 (DOI: https://doi.org/10.1111/j.1742-481x.2010.00660.x)