Negative-pressure wound therapy apparatus

A negative-pressure wound therapy apparatus comprising:

• a wound dressing adapted for providing a closed space between a central portion of a principal surface of the wound dressing and a wound region by closely contacting a peripheral portion of the principal surface with a periphery of a skin surface in the wound region;
• a first pump device including a first conduit attached to the wound dressing and a first inlet communicating with the closed space through the first conduit;
• and
• a second pump device including a second conduit freely attachable to and detachable from the wound dressing and a second inlet communicating with the closed space through the second conduit, the second pump device being isolated from the first pump device,
• wherein a suction flow rate of the second pump device is higher than a suction flow rate of the first pump device when the first pump device and the second pump device are driven simultaneously,
• the first pump device sucks fluid from the closed space through the first conduit and the first inlet, and
• when the second conduit is attached to the wound dressing the second conduit communicates directly with the closed space, the second pump device sucks fluid from the closed space through the second conduit and the second inlet.