Abstract: The present invention provides a medical device and a method for the selective separation of a biological sample of a mammal into a first portion and a second portion. It comprises a first layer comprising a first reservoir for receiving the biological sample and for retaining the first portion of the sample, and a second layer comprising a second reservoir for receiving the second portion of the sample. Between the first layer and the second layer a third layer is provided, wherein the third layer comprises a plurality of channels configured to provide a fluid communication between the first reservoir and the second reservoir. Furthermore, between the first layer and the second layer a fourth layer adjacent to the third layer is provided, wherein the fourth layer comprises and/or is configured as a separation layer.

Abstract: The present invention provides a medical device and a method for the selective separation of a biological sample of a mammal into a first portion and a second portion. It comprises a first layer comprising a first reservoir for receiving the biological sample and for retaining the first portion of the sample, and a second layer comprising a second reservoir for receiving the second portion of the sample. Between the first layer and the second layer a third layer is provided, wherein the third layer comprises a plurality of channels configured to provide a fluid communication between the first reservoir and the second reservoir. Furthermore, between the first layer and the second layer a fourth layer adjacent to the third layer is provided, wherein the fourth layer comprises and/or is configured as a separation layer.

Abstract: Various embodiments of methods and apparatuses for separating sperm, including apparatus having an inlet and an outlet reservoir, and either: i) a radial array of microchannels disposed between the inlet and outlet reservoirs to provide fluid communication therebetween and to direct motile sperm inwardly from the inlet reservoir to the outlet reservoir; or ii) at least one microchannel path disposed between the inlet and outlet reservoirs to provide fluid communication therebetween, the at least one microchannel path having a path inlet adjacent the inlet reservoir, a path outlet adjacent the outlet reservoir, and a junction located between the path inlet and the path outlet for directing a portion of sperm that enter the path inlet towards the outlet reservoir based on wall-swimming behavior of sperm. Methods include filling an apparatus with buffer fluid, introducing semen into an inlet reservoir, and retrieving sperm separated from the semen from the outlet reservoir.

Abstract: Various embodiments of methods and apparatuses for separating sperm, including apparatus having an inlet and an outlet reservoir, and either: i) a radial array of microchannels disposed between the inlet and outlet reservoirs to provide fluid communication therebetween and to direct motile sperm inwardly from the inlet reservoir to the outlet reservoir; or ii) at least one microchannel path disposed between the inlet and outlet reservoirs to provide fluid communication therebetween, the at least one microchannel path having a path inlet adjacent the inlet reservoir, a path outlet adjacent the outlet reservoir, and a junction located between the path inlet and the path outlet for directing a portion of sperm that enter the path inlet towards the outlet reservoir based on wall-swimming behaviour of sperm. Methods include filling an apparatus with buffer fluid, introducing semen into an inlet reservoir, and retrieving sperm separated from the semen from the outlet reservoir.