JPRN‐UMIN000004840.

Trial name or title	Clinical study for the treatment of chronic wounds using platelet‐rich plasma
Methods	Randomised parallel controlled study
Participants	Country: Japan Number randomised (patients): 20 Wound aetiology: Pressure ulcer, foot ulcer Age: 20 years and older Sex: Male and female Inclusion criteria: Chronic or unstable skin ulcer. Written informed consent by patient themselves Exclusion criteria: presence of anaemia, thrombocytopenia or local infection
Interventions	Experimental: Local injection of PRP together with standard therapy using ointment and dressing materials Comparator: Standard therapy using ointment and dressing materials
Outcomes	Primary outcome: Period for complete wound closure Secondary outcomes: If complete wound closure is unsuccessful, other evaluation will be: wound condition, wound area, formation of granulation tissue, epithelialisation of wound margin, etc
Starting date	1/1/2011
Contact information	Jiro Maegawa; Kazunori Yasumura, burngdy@hotmail.com
Notes	Funding: Yokohama City University Hospital (Japan)