In the scientific literature, positive results are reported after treatment of hard-to-heal wounds with cold plasma.

Comprehensive clinical plasma medicine: Cold physical plasma for medical application
Metelmann, et al.
Springer International Publishing (2018)

Plasma medicine: Current state of research and medical application
Weltmann, Von Woedtke
Plasma Physics and Controlled Fusion (2017)

Clinical plasma medicine: State and Perspectives of in vivo application of cold atmospheric plasma
Von Woedtke, et al.
Contributions to Plasma Physics (2014)

Atmospheric pressure plasmas: infection control and bacterial responses
Mai-Prochnow, et al.
International Journal of Antimicrobial Agents (2014)

Low temperature plasma biomedicine: A tutorial review
Physics of Plasmas (2014)

Plasma applications: A dermatological view
Tiede, et al.
Contributions to Plasma Physics (2014)

Non-thermal plasma—More than five years of clinical experience
Isbary, et al.
Clinical Plasma Medicine (2013)