Tissue resecting instrument including variable drive
AssigneeCovidien LP
InventorTYLER J. LAURITO
Life of this patent
Estimating the term…
Abstract
A tissue resecting instrument includes an outer shaft defining a window at a distal end portion thereof, an inner cutting shaft extending through the outer shaft and configured to translate and rotate relative to the outer shaft to cut tissue extending through the window, and a drive assembly coupled to the inner cutting shaft. Actuation of the drive assembly in a first configuration drives translation of the inner cutting shaft at a first linear speed and rotation of the inner cutting shaft at a rotational speed. Actuation of the drive assembly in a second configuration drives translation of the inner cutting shaft at a second linear speed different from the first linear speed and rotation of the inner cutting shaft at the rotational speed.
Claims20
A tissue resecting instrument, comprising:
- an outer shaft defining a window at a distal end portion thereof;
- an inner cutting shaft extending through the outer shaft, the inner cutting shaft configured to translate and rotate relative to the outer shaft to cut tissue extending through the window;
- and
- a drive assembly coupled to the inner cutting shaft, wherein actuation of the drive assembly in a first configuration drives translation of the inner cutting shaft at a first linear speed and rotation of the inner cutting shaft at a rotational speed, and wherein actuation of the drive assembly in a second configuration drives translation of the inner cutting shaft at a second linear speed different from the first linear speed and rotation of the inner cutting shaft at the rotational speed.
A tissue resecting instrument, comprising:
- an outer shaft defining a window at a distal end portion thereof;
- an inner cutting shaft extending through the outer shaft, the inner cutting shaft configured to translate and rotate relative to the outer shaft to cut tissue extending through the window;
- a drive assembly coupled to the inner cutting shaft, the drive assembly including a helical member defining first and second helical channels, each helical channel defining a different pitch;
- and
- at least one coupler configured for selective receipt within the first helical channel to engage the drive assembly in a first configuration and selective receipt within the second helical channel to engage the drive assembly in a second configuration,
- wherein actuation of the drive assembly in the first configuration drives translation of the inner cutting shaft at a first linear speed and rotation of the inner cutting shaft at a rotational speed, and wherein actuation of the drive assembly in the second configuration drives translation of the inner cutting shaft at a second linear speed different from the first linear speed and rotation of the inner cutting shaft at the rotational speed.
A method of resecting tissue, comprising:
- engaging a drive assembly in one of at least a first configuration or a second configuration;
- and
- actuating the drive assembly, wherein:
- if the drive assembly is engaged in the first configuration, actuating the drive assembly drives translation of an inner cutting shaft at a first linear speed through and relative to an outer shaft and drives rotation of the inner cutting shaft relative to the outer shaft at a rotational speed;
- and
- if the drive assembly is engaged in the second configuration, actuating the drive assembly drives translation of the inner cutting shaft at a second linear speed through and relative to the outer shaft and drives rotation of the inner cutting shaft relative to the outer shaft at the rotational speed, wherein the second linear speed is different from the first linear speed.
Dependencies are inferred from the claim text.