Medical device having rotating shaft with lumen and sealing structure
AssigneeTerumo Kabushiki Kaisha
InventorsMizuho Shiraishi, Yuichi Tada, Akihiro Takahashi
Life of this patent
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Abstract
Provided is a medical device capable of easily changing a position of the device inside a biological lumen and effectively removing a cut object. The medical device for removing the object in the biological lumen has a drive shaft, a cutting portion, a first housing that accommodates the drive shaft to be rotatable, a second housing that is rotatable with respect to the first housing, and a support portion that supports the first housing and the second housing. The second housing and the support portion relatively move along an axis to restrict relative rotation of the first housing and the second housing. The support portion supports the second housing to be rotatable around the axis.
Claims5
A medical device for removing an object inside a biological lumen, comprising:
- a drive shaft that is rotatable about a rotation axis;
- a cutting portion fixed to a distal portion of the drive shaft and configured to cut the object;
- a first housing that accommodates the drive shaft to be rotatable relative to the first housing;
- a second housing located on a distal side of the first housing and rotatable with respect to the first housing around the rotation axis, wherein the drive shaft is rotatable relative to the second housing;
- and
- a support portion that supports the first housing and the second housing, wherein the drive shaft is rotatable relative to the support portion,
- wherein one of the first housing, the second housing, and the support portion has a recess portion, and an other one of the first housing, the second housing, and the support portion has a projection portion fittable into and detachable from the recess portion by relatively moving along the rotation axis,
- wherein the projection portion and the recess portion are configured to be fitted together to restrict relative rotation of the first housing and the second housing,
- wherein the support portion supports at least one of the first housing and the second housing to be rotatable around the rotation axis.
Dependencies are inferred from the claim text.