Medical device and methods

摘要

hysteroscopic system includes a hysteroscope having a main body coupled to an extension portion. The extension portion may be a shaft configured to extend transcervically to a patient's uterine cavity. First, second, and third channels extend from the main body to a distal end of the extension portion. A fluid source is coupleable to a proximal end of the first channel, and a pressure sensor is coupleable to a proximal end of the second channel. A tissue resecting probe is configured for introduction through the third channel. At least one resistance feature is included which is configured to provide a selected level of resistance to axial sliding of the probe through the third channel while permitting rotation of the probe within the third channel.

主权项

1. An improved hysteroscopic system, comprising:
a hysteroscope having a handle portion and a rigid extension portion extending distally from the handle portion, wherein the rigid extension portion is configured to extend transcervically to a patient's uterine cavity; first, second, and third channels extending within the handle portion and through the rigid extension portion to a distal end of the rigid extension portion, wherein the third channel defines a lumen which extends from a distal end of the rigid extension portion to an opening at a proximal face of the handle portion; wherein a proximal end of the first channel is configured to be coupled to a fluid source; wherein a proximal end of the second channel is configured to be coupled to a pressure sensor; a tissue resecting probe including a rigid outer sleeve configured for introduction through the third channel; and at least one resistance feature within the handle portion configured to provide a selected level of resistance to axial sliding of the tissue resecting probe through the third channel while permitting rotation of the tissue resecting probe within the third channel, wherein the at least one resistance feature is an offset of a proximal portion of the third channel extending distally from the opening at the proximal face of the handle portion relative to a distal portion of the third channel extending proximally through the rigid extension portion from the distal end such that a center of the opening at the proximal face of the handle portion is offset a distance perpendicular from an extension of a straight central axis of the distal portion of the third channel extending through the rigid extension portion from the distal end.