A tissue extraction apparatus (also called 'tissue removal device') (104, 3100), comprising: a frame (3102) a rigid suction or suction chamber (148, 3104) extending from the frame ( 140, 3102) to a distal tip (3106), outside the frame (140, 3102)； a valve (156, 3110) located in the frame (140, 3102) and configured to communicate with a vacuum source (108), so that the valve comprises a valve port (3470) that is communicated with the suction cannula (148, 3104) in a fluid tight manner, and such that the inside diameter of the valve port (3470) is equal to or greater than the inside diameter of the distal tip (3106)； and a pneumatically activated actuator or actuator (3780) and configured to move the valve (156, 3110) between an open position and a closed position, such that: in the open position, the valve port (3470) is open, and defines or delimits valve route suction or suction through the suction cannula (148, 3104) and the valve； and in the closed position, the valve port (3470) is closed, and the valve prevents vacuum is applied at the distal tip (3106)； characterized in that the valve (156, 3110) comprises an inner cannula (3338) and an outer cannula (3466) coaxially arranged around at least a part of the inner cannula； so that the inner cannula is configured to communicate with the vacuum source (108), and the actuator (3780) can move it linearly through the outer cannula (3466), between an open position and a closed position； and so that the valve port (3470) is located in the outer cannula, and in the open position the suction path passes through the outer cannula - through the valve port - and reaches the inner cannula, and in the closed position the inner cannula blocks the valve port.Un aparato de extracción de tejidos (también llamado 'dispositivo de eliminación de tejidos') (104, 3100), que comprende: un armazón (3102) una cámara de succión o aspiración rígida (148, 3104) que se extiende desde el armazón (140, 3102) hasta una punta distal (3106), fuera
