Methods and devices for resecting tissue from the interior of a patient's body using a inner and outer sleeves with respective cutting windows where an inner cutting window includes reinforced section to permit increased sharpness of sections of the inner window.

An integrated hysteroscopic treatment system which includes an endoscopic viewing system, a fluid management system, a resecting device and a controller for operating all the systems.

Disclosed herein is a medical device. The medical device includes a blade tube section, a solenoid, and a mechanical arrangement. The blade tube section includes an outer blade tube, an inner blade tube, and a cutting window at a distal end of the blade tube section. The solenoid is offset from a central axis of the blade tube section. The mechanical arrangement is between the inner blade tube and the solenoid.

A drive system for a handheld rotary medical device including a force absorption system incorporated in a drive coupling of the drive system is disclosed. The force absorption system may be included in the drive coupling whereby force absorption system absorbs linear forces aligned with a longitudinal axis of the drive coupling. As such, the force absorption system permits limited linear movement of a rotary surgical implement, which may be a shaver, burr or the like, relative to a drive shaft and handheld housing.

A surgical cutting tool includes an outer tube extending longitudinally between proximal and distal ends. The outer tube includes an inner surface defining a lumen therethrough. The surgical cutting tool further includes a flexible driveshaft including an inner tube rotatably disposed in the lumen and extending in a longitudinal direction. The driveshaft may include at least two torsion sections spaced from one another longitudinally along the inner tube. The torsion sections each have at least one channel extending through the inner tube. The driveshaft further includes a bearing section disposed longitudinally between the torsion sections. The channels are configured to collapse under rotational load in response to transmission of torque as the driveshaft rotates such that the torsion sections are spaced apart from the inner surface of the outer tube to a greater extent than the bearing section for reducing friction between the inner tube and the outer tube.

A medical device system configured to dynamically switch motor control protocols while a motor within a handheld device is operating to increase efficiency of the motor operation and to provide improved reliability and performance is disclosed. In at least one embodiment, the medical device system may be configured to dynamically switch motor control protocols while the motor is operating based on input from one or more sensors configured to monitor a motor, including, but not limited to, monitoring a magnetic flux field of the motor or monitoring current to the motor. The medical device system may dynamically switch motor control protocols between motor control protocols, including, but not limited to, Six-Step Commutation, Hall-Based Sinusoidal Commutation and Field Oriented Commutation.

Disclosed herein are endoscope assemblies, and more particularly endoscopes with a working channel for use in hysteroscopy, and methods of use thereof. Devices and systems related to an integrated hysteroscopic treatment system including an endoscopic viewing system, a fluid management system, a resecting device and a controller for operating all the systems. Also disclosed are integrated hysteroscopic treatment systems that include an endoscopic viewing system, a fluid management system, a resecting device and a controller for operating all the systems.

An end effector assembly of a tissue-resecting device is disclosed. The end effector assembly includes an outer shaft and an inner shaft. The outer shaft includes an outer shaft window defined within a distal end portion thereof. The outer shaft window defines an outer shaft cutting edge extending about at least a portion of a perimeter thereof. The outer shaft cutting edge includes a plurality of teeth. The inner shaft is disposed within and rotatable relative to the outer shaft, and includes an inner shaft window defined within a distal end portion thereof. The inner shaft window defines a toothless inner shaft cutting edge extending about at least a portion of a perimeter thereof. Rotation of the inner shaft relative to the outer shaft causes the inner shaft cutting edge to rotate toward the outer shaft cutting edge.

A medical device system configured to dynamically control a shaver window opening via controlling positioning of an opening in an inner drive shaft relative to an opening in an outer housing based on continuously tracking the motor is disclosed. The medical device system may include a shaver at a distal end and an aspiration system configured to aspirate material through the inner drive shaft. A processor of the medical device system may control rotational motion of the inner drive shaft based on continuously sensing the position of the opening in the inner drive shaft to reduce clogs and increase cutting effectiveness of the system. By continuously monitoring the medical device system, the processor can correct out of phase conditions in oscillation mode to prevent poor cutting conditions. The processor can also dynamically determine a reversal position on the opening in the inner drive shaft to create a desired cutting action.

The present disclosure is directed to a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method may include providing an intravascular device having a distal portion and a longitudinal axis and inserting the intravascular device into the vascular lumen. The method may further include positioning the distal portion in the vascular wall, rotating the intravascular device about the longitudinal axis, and advancing the intravascular device within the vascular wall.