Telescoping vascular dilator
OwnerBrack Hattler, Vincent Testainventors
Life of this patent
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Abstract
A telescoping dilator assembly is configured for percutaneous insertion of large diameter intravascular devices into a blood vessel while avoiding kinking of a guidewire and minimizing blood loss. The assembly includes a first smaller diameter dilator with an inner lumen that fits snugly over a guidewire. The smaller dilator may be tapered on both ends. A second larger diameter dilator is configured to slide over the first smaller dilator. A tear away sheath is configured to slide over the dilators and into a blood vessel. A tear away sheath plug is configured to form a seal at a proximal end of the sheath. When the dilators are removed from the blood vessel, an intravascular device may be passed through the sheath into the blood vessel.
Claims17
A dilator assembly, comprising:
- a first dilator configured with a first proximal portion having a first proximal aperture, a first tapered distal portion having a first distal aperture, and a first tubular segment having a substantially uniform first outer diameter and a first inner lumen between the first proximal portion and the first distal portion;
- and
- a second dilator configured with a second proximal portion having a second proximal aperture, a second tapered distal portion having a second distal aperture, and a second tubular segment between the second proximal portion and the second distal portion, the second tubular segment having a substantially uniform second outer diameter and a second inner lumen, wherein the diameter of the second inner lumen is substantially the same as the outer diameter of the first tubular segment of the first dilator.
An introducer assembly, comprising:
- a first dilator configured with a first proximal portion having a first proximal aperture, a first tapered distal portion having a first distal aperture, and a first tubular segment having a substantially uniform first outer diameter and a first inner lumen between the first proximal portion and the first distal portion;
- a second dilator configured with a second proximal portion having a second proximal aperture, a second tapered distal portion having a second distal aperture, and a second tubular segment between the second proximal portion and the second distal portion, the second tubular segment having a substantially uniform second outer diameter and a second inner lumen, wherein the diameter of the second inner lumen is substantially the same as the outer diameter of the first tubular segment of the first dilator;
- and
- a sheath configured with a third inner diameter substantially the same as the second outer diameter of the second dilator.
A method of dilating an opening into a blood vessel, comprising:
- inserting a guidewire into a blood vessel;
- inserting a first dilator into blood vessel over the guidewire;
- and
- inserting a second dilator into blood vessel over the first dilator.
A method of inserting a medical device into a blood vessel, comprising:
- inserting a guidewire into a blood vessel;
- sliding a first dilator over the guidewire;
- sliding a second dilator over the first dilator;
- inserting a sheath over the second dilator;
- removing the first dilator and the second dilator from the blood vessel;
- and
- inserting a medical device into the blood vessel through a proximal opening of the sheath.
A method of inserting a medical device into a blood vessel, comprising:
- inserting a guidewire into a blood vessel;
- sliding a first dilator over the guidewire;
- sliding a second dilator over the first dilator;
- inserting a medical device (cannula, catheter, or other) over the second dilator and into the blood vessel
- removing the first dilator and the second dilator from the blood vessel.
A dilator kit, comprising:
- a guidewire;
- a first dilator configured with a first proximal portion having a first proximal aperture, a first tapered distal portion having a first distal aperture, and a first tubular segment having a substantially uniform first outer diameter and a first inner lumen between the first proximal portion and the first distal portion;
- and
- a second dilator configured with a second proximal portion having a second proximal aperture, a second tapered distal portion having a second distal aperture, and a second tubular segment between the second proximal portion and the second distal portion, the second tubular segment having a substantially uniform second outer diameter and a second inner lumen, wherein the diameter of the second inner lumen is substantially the same as the outer diameter of the first tubular segment of the first dilator.
Dependencies are inferred from the claim text.