A disposable device for transfer of at least one predetermined medium into a device for treatment and promotion of healing of damaged body tissue. The device is comprised of a housing and a first pump stage disposed within the housing for pumping a first predetermined medium. A second pump stage engageable with such housing is included for pumping a second predetermined medium. Also included is a drive mechanism for driving the first and second pump stages. A coupling device engageable with the drive mechanism for connecting the drive mechanism to a power source is further included.