Tissue resecting instrument including an outflow control seal

An end effector assembly of a tissue resecting instrument, the end effector assembly comprising:

• a proximal hub housing;
• an outer shaft extending from the proximal hub housing;
• an inner shaft disposed within the outer shaft and configured to rotate and reciprocate relative to the outer shaft for cutting tissue;
• and
• an inner core drive assembly disposed at least partially within the proximal hub housing, the inner core drive assembly operably coupled to the inner shaft and configured such that a rotational input provided to the inner core drive assembly effects the rotation and reciprocation of the inner shaft relative to the outer shaft, the inner core drive assembly including:
• a proximal receiver configured to receive the rotational input and to rotate relative to the proximal hub housing in response thereto, the proximal receiver including a seal member disposed thereon;
• and
• a connector operably coupled to the proximal receiver such that the rotation of the proximal receiver effects rotation of the connector relative to the proximal hub housing and reciprocation of the connector relative to the proximal receiver and the proximal hub housing between a proximal position and a distal position, the connector operably coupled to the inner shaft such that the rotation and reciprocation of the connector effects the rotation and reciprocation of the inner shaft, the connector defining a cavity disposed in fluid communication with an interior of the inner shaft, wherein, in the proximal position, the connector abuts the seal member to establish a seal that blocks outflow from the cavity, and wherein, in the distal position, the connector is displaced from the seal member to permit outflow from the cavity.