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US 10,368,931 B2Granted
Spacer, implant assembly including the same, manufacturing method of spacer, and surgical method for spacer indwelling
AssigneeTerumo Kabushiki Kaisha
InventorsYasuyuki Honma, Makoto Narita
Life of this patent
Estimating the term…
Abstract
A spacer and implant assembly are disclosed, the spacer including an outer balloon that is folded so as to be dilatable, and an inner balloon that is folded so as to be dilatable, and that is removably inserted into the outer balloon. The inner balloon dilates in response to introduction of a dilating fluid having a lower viscosity than a viscosity of a filling material inserted into the outer balloon, and the outer balloon dilates in response to the dilation of the inner balloon.
Claims19
A spacer configured to indwell between bones so as to expand a space between the bones, the spacer comprising:
- an outer balloon that is folded so as to be dilatable;
- an inner balloon that is folded so as to be dilatable, and that is removably inserted into the outer balloon, wherein the inner balloon is configured to dilate in response to introduction of a dilating fluid having a lower viscosity than a viscosity of a filling material introduced into the outer balloon, the inner balloon in a dilated state having a cylindrical shape;
- and
- wherein the outer balloon is configured to dilate in response to the dilation of the inner balloon, the outer balloon in a fully dilated state having a neck portion and bulged portions disposed on both sides of the neck portion.
1 more element
An assembly comprising:
- a spacer configured to indwell between bones so as to expand a space between the bones, the spacer including an outer balloon that is folded so as to be dilatable and an inner balloon that is folded so as to be dilatable, and that is removably inserted into the outer balloon, wherein the inner balloon is configured to dilate in response to introduction of a dilating fluid having a lower viscosity than a viscosity of a filling material introduced into the outer balloon, and wherein the outer balloon is configured to dilate in response to the dilation of the inner balloon;
- a holding fluid for maintaining a dilated state of the outer balloon when the inner balloon is deflated by removing the dilating fluid from the inner balloon, the holding fluid being introduced into a portion between the inner balloon and the outer balloon;
- and
- an outflow portion configured to cause the holding fluid inside the outer balloon to flow outward, in response to the filling material being introduced into the outer balloon.
1 more element
An implant assembly comprising:
- a spacer configured to indwell between bones as an implant for expanding a space between the bones, the spacer comprising:
- an outer balloon that is folded so as to be dilatable;
- an inner balloon that is folded so as to be dilatable, and that is removably inserted into the outer balloon, wherein the inner balloon is configured to dilate in response to introduction of a dilating fluid which has a lower viscosity than a viscosity of a filling material introduced into the outer balloon, the inner balloon in a dilated state having a cylindrical shape;
- and
- the outer balloon configured to dilate in response to the dilation of the inner balloon, the outer balloon in a fully dilated state haying a neck portion and bulged portions disposed on both sides of the neck portion;
- a catheter tube that is detachably connected to a proximal end of the spacer;
- and
- a hub that is connected to a proximal end of the catheter tube.
5 more elements
A surgical method for spacer indwelling in which a spacer indwells between bones so as to expand a space between the bones, the method comprising:
- inserting the spacer including an outer balloon that is folded so as to be dilatable and an inner balloon that is folded so as to be dilatable and that is inserted into the outer balloon, into the space between the bones;
- dilating the inner balloon by introducing a dilating fluid having lower viscosity than viscosity of a filling material into the inner balloon, the inner balloon in a dilated state having a cylindrical shape, and partially dilating the outer balloon in response to the dilation of the inner balloon;
- deflating the inner balloon by removing the dilating fluid from the inside of the inner balloon;
- removing the deflated inner balloon from the outer balloon;
- and
- dilating the outer balloon by introducing additional filling material into the outer balloon, and wherein the outer balloon in a fully dilated state has a neck portion and bulged portions disposed on both sides of the neck portion.
3 more elements
Dependencies are inferred from the claim text.