A biopsy device, comprising: (a) a body; (b) a needle associated with the body, wherein the needle defines a first lumen and a second lumen, wherein the first lumen extends along a first longitudinal axis, wherein the second lumen extends along a second longitudinal axis, wherein the needle includes an opening fluidly coupling the first lumen with the second lumen; (c) a cutter, wherein the cutter is configured to translate relative to the needle to sever tissue; (d) a valve assembly, comprising: (i) a valve body having an interior, one or more vent openings in communication with the interior, and one or more saline openings in communication with the interior, wherein the interior is in communication with the second lumen, wherein the one or more vent openings are further in communication with atmospheric air, wherein the one or more saline openings are further in communication with a source of saline, (ii) a translating member slidably disposed in the valve body, wherein the translating member is configured to selectively couple the second lumen with either the one or more vent openings or the one or more saline openings based on the longitudinal position of the translating member within the valve body, wherein the cutter extends through the valve body and through the translating member, the biopsy device characterised by the cutter including a first member and a second member, both the first member and the second member being secured to the cutter; and the first member being configured to move the translating member distally within the valve body when the cutter is moved distally, the second member being configured to move the translating member proximally within the valve body when the cutter is moved proximally. (a) a body; (b) a needle associated with the body, wherein the needle defines a first lumen and a second lumen, wherein the first lumen extends along a first longitudinal axis, wherein the second lumen extends along a second longitudinal axis, wherein the needle includes an opening fluidly coupling the first lumen with the second lumen; (c) a cutter, wherein the cutter is configured to translate relative to the needle to sever tissue; (d) a valve assembly, comprising: (i) a valve body having an interior, one or more vent openings in communication with the interior, and one or more saline openings in communication with the interior, wherein the interior is in communication with the second lumen, wherein the one or more vent openings are further in communication with atmospheric air, wherein the one or more saline openings are further in communication with a source of saline, (ii) a translating member slidably disposed in the valve body, wherein the translating member is configured to selectively couple the second lumen with either the one or more vent openings or the one or more saline openings based on the longitudinal position of the translating member within the valve body, wherein the cutter extends through the valve body and through the translating member, the biopsy device characterised by the cutter including a first member and a second member, both the first member and the second member being secured to the cutter; and the first member being configured to move the translating member distally within the valve body when the cutter is moved distally, the second member being configured to move the translating member proximally within the valve body when the cutter is moved proximally. (i) a valve body having an interior, one or more vent openings in communication with the interior, and one or more saline openings in communication with the interior, wherein the interior is in communication with the second lumen, wherein the one or more vent openings are further in communication with atmospheric air, wherein the one or more saline openings are further in communication with a source of saline, (ii) a translating member slidably disposed in the valve body, wherein the translating member is configured to selectively couple the second lumen with either the one or more vent openings or the one or more saline openings based on the longitudinal position of the translating member within the valve body, wherein the cutter extends through the valve body and through the translating member, the biopsy device characterised by the cutter including a first member and a second member, both the first member and the second member being secured to the cutter; and the first member being configured to move the translating member distally within the valve body when the cutter is moved distally, the second member being configured to move the translating member proximally within the valve body when the cutter is moved proximally.