A method of detecting bleeding from a wound including: providing, on a support, a substantially non-volatile agent capable of forming a volatile agent on contact with blood； disposing the non-volatile agent on the support at or near the wound； providing a probe for detection of the volatile agent； disposing the probe for detection of the volatile agent at a distance from the support； generating a flow of air in a direction from the support to the probe； monitoring the formation of volatile agent by the probe, thereby detecting a bleeding of the wound. Also disclosed are a system and a disposable device for use in the method.
