Trocar device and method
AssigneeEdwin Ryan
InventorEdwin Ryan
Life of this patent
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Abstract
A trocar assembly and associated methods are shown. Using example devices and methods shown, a surgeon may insert an obturator with a blade portion and a tube portion of a cannula into tissue such as eye tissue. In one state, the blade portions are wider than or equal to outer diameters of the tube portions. This facilitates an incision in tissue such as eye tissue that is wide enough to allow the tube portions to pass through. Because the blade portions are adapted to deform, they may be withdrawn through the inner diameter of the tube portions.
Claims18
A trocar assembly, comprising:
- a cannula;
- an obturator within the cannula;
- and
- a flexible blade at a tip of the obturator, the flexible blade having a width that is larger than an inner diameter of the cannula, wherein the flexible blade is adapted to deform sufficiently to allow the obturator to be withdrawn through the inner diameter of the cannula.
A trocar assembly, comprising:
- a cannula;
- an obturator within the cannula;
- a flexible blade at a tip of the obturator, the flexible blade having an internal space within the blade;
- and
- a dilator adapted to fit within the internal space within the blade, wherein a first width of the blade is equal to or wider than an inner diameter of the cannula when the dilator is inserted within the internal space, and wherein a second width of the blade is equal to or smaller than the inner diameter of the cannula when the dilator is removed from the internal space.
A method of inserting a trocar, comprising:
- pushing a trocar assembly into a tissue, the trocar assembly including:
- a cannula;
- an obturator within the cannula;
- a flexible blade at a tip of the obturator, the flexible blade having a width that is larger than an inner diameter of the cannula;
- forming an incision in the tissue wider than the inner diameter of the cannula using the flexible blade and guiding the cannula into the tissue through the incision;
- withdrawing the obturator and the blade, leaving the cannula in place;
- and
- deforming the flexible blade while withdrawing the obturator and the blade such that the deformed blade has a width that is equal to or smaller than the inner diameter of the cannula.
A method of inserting a trocar, comprising:
- pushing a trocar assembly into a tissue, the trocar assembly including:
- a cannula;
- an obturator within the cannula;
- a flexible blade at a tip of the obturator;
- a dilator within the flexible blade causing the flexible blade to have a first width that is larger than an inner diameter of the cannula;
- forming an incision in the tissue wider than the inner diameter of the cannula using the flexible blade and guiding the cannula into the tissue through the incision;
- withdrawing the dilator, causing the flexible blade to have a second width that is equal to or less than the inner diameter of the cannula;
- and
- withdrawing the obturator and the blade, leaving the cannula in place.
Dependencies are inferred from the claim text.