Abstract: A method for determining a concentration of a target gas in blood of a human or animal animate being. The method includes the steps of: generating electromagnetic excitation radiation having a carrier frequency, wherein the carrier frequency is selected such that the target gas and an absorbing gas absorb the excitation radiation, modulating an amplitude or the carrier frequency of the excitation radiation with a modulation frequency, illuminating an absorption path superficial to a skin of the animate being with the excitation radiation, generating a sound wave by an absorption of the excitation radiation in the absorption gas, and detecting at least one of an amplitude and a phase of the sound wave as a measure of a concentration of the target gas on the absorption path. Also provided is a photoacoustic sensor for determining a concentration of a target gas in blood of a human or animal animate being.

Abstract: A method including providing an acoustic resonator having an absorption element with a surface portion, providing a sample fluid or a fluid mixture containing the sample fluid with at least one absorption fluid or particles such that the acoustic resonator is filled with the same, the surface portion of the absorption element being in contact with the sample fluid. Irradiating the surface portion of the absorption element with a first electromagnetic radiation such that the absorption element at least partly absorbs the first electromagnetic radiation in the region of the surface portion, or irradiating the fluid mixture with a first electromagnetic radiation such that the absorption fluid or the absorption particles at least partly absorb(s) the first electromagnetic radiation, and so, by way of the absorption, pressure energy is generated in the sample fluid or the fluid mixture, with the first electromagnetic radiation being amplitude modulated or frequency modulated with a modulation frequency.

Abstract: The present invention relates to a transdermal therapeutic system for the controllable release of an active ingredient, particularly a substance promoting wound healing, to a chronic wound or for chemotherapy, with at least one waveguide, wherein the active ingredient is deposited on the waveguide via a bond that is cleavable by electromagnetic pulses in the waveguide.

Abstract: The present invention relates to a transdermal therapeutic system for the controllable release of an active ingredient, particularly a substance promoting wound healing, to a chronic wound or for chemotherapy, with at least one waveguide, wherein the active ingredient is deposited on the waveguide via a bond that is cleavable by electromagnetic pulses in the waveguide.