Devices and methods having a cooling material and reduced pressures to treat biological external tissue using at least one energy source are disclosed. The cooling material may be water, ethyl alcohol, and/or any other material having a vapor pressure below atmospheric pressure. The energy source may...http://www.google.de/patents/US7842029?utm_source=gb-gplus-sharePatent US7842029 - Apparatus and method having a cooling material and reduced pressure to treat biological external tissue
