Tissue cutting systems and methods

A tissue resecting device comprising:

• a handle;
• an elongate shaft extending from the handle, the elongate shaft including an outer sleeve and a reciprocating inner resecting sleeve disposed in the outer sleeve, wherein such reciprocation of the inner resecting sleeve moves a distal end of the inner resecting sleeve across a tissue-receiving window of the outer sleeve between window-open and window-closed positions at a reciprocation speed;
• a motor drive in the handle;
• and
• an actuator in the handle coupled between the motor drive and the inner resecting sleeve to convert rotational motion from the motor drive to reciprocation motion of the inner resecting sleeve relative to the outer sleeve for reciprocating the inner resecting sleeve at the reciprocation speed, wherein the actuator is configured to vary the reciprocation speed within one full reciprocation stroke of the inner reciprocating sleeve independent of changing rotational speed of the motor drive;
• wherein the actuator includes an actuator body with an arcuate slot therein, wherein rotational motion from the motor drive rotates the actuator body;
• and
• wherein the inner resecting sleeve extends proximal of the actuator body and reciprocates relative thereto.