Abstract: A surgical device includes a handle assembly, an elongated portion, an end effector, a visualization device, and a constant horizon mechanism. The elongated portion extends distally from the handle assembly and defines a longitudinal axis. The end effector is rotatable about the longitudinal axis relative to the handle assembly. The visualization device defines a visualization axis. A first portion of the visualization device extends through the elongated portion, and a second portion of the visualization device is disposed at least partially within the handle assembly. The visualization device is rotatable about the longitudinal axis relative to the handle assembly. The constant horizon mechanism is disposed in operative engagement with the visualization device and is configured to prevent the visualization device from rotating about the visualization axis when the visualization device rotates about the longitudinal axis.

Abstract: A surgical device includes a handle assembly, an elongated portion, an end effector, a visualization device, and a constant horizon mechanism. The elongated portion extends distally from the handle assembly and defines a longitudinal axis. The end effector is rotatable about the longitudinal axis relative to the handle assembly. The visualization device defines a visualization axis. A first portion of the visualization device extends through the elongated portion, and a second portion of the visualization device is disposed at least partially within the handle assembly. The visualization device is rotatable about the longitudinal axis relative to the handle assembly. The constant horizon mechanism is disposed in operative engagement with the visualization device and is configured to prevent the visualization device from rotating about the visualization axis when the visualization device rotates about the longitudinal axis.

Abstract: A resectoscope includes a handle portion, a flow sheath, and an electrode. The flow handle portion includes a trigger, the flow sheath extends from the handle portion and has a hub and a shaft extending from the hub including a rigid inner tube and a semi-rigid outer tube, the rigid inner tube extending through the semi-rigid outer tube to define a channel therebetween, wherein the rigid inner tube may include a fiber-reinforced material, the semi-rigid outer tube may include a polymeric material. The retractor tool is slidably disposed in the flow sheath and includes a linkage and a traction member pivotably coupled to the linkage. The electrode is slidably disposed in the flow sheath and may be made at least in part of sheet metal.