Vascular access device
AssigneeSmiths Medical ASD, Inc.
InventorSteven F. Bierman
Life of this patent
Estimating the term…
Abstract
An access device for placing a medical article within a body space includes a syringe, a needle, and a sheath which are employed together with a guide wire. The sheath can be coaxially and slideably disposed about the needle. During insertion of the sheath over the needle, guide wire and into the body space, the syringe provides a negative pressure to ensure that any air located between the inside diameter of the sheath and the outside diameter of the needle is drawn into the needle rather than into the body space. In certain embodiments, a dilator is coaxially and slideably disposed about the needle and within the sheath.
Claims23
An access device for placing a medical article within a body space, the access device comprising:
- a barrel and a plunger slidingly disposed in the barrel, the plunger having a channel sized and shaped to receive a guide wire therethrough, the barrel defining a fluid chamber, an interior needle portion at least partially disposed in the channel and comprising an aperture through a side wall of the interior needle portion and into the fluid chamber;
- an exterior needle portion extending from the barrel and being in flow communication with the interior needle portion and the fluid chamber;
- and
- a sheath coaxially disposed about the exterior needle portion and slideable along the exterior needle portion, a distal end of the sheath being positioned proximal to a distal end of the exterior needle portion.
An access device for placing a medical article within a body space, the access device comprising:
- a syringe and a needle extending from the syringe, the syringe having a channel configured to receive a guide wire extending through the needle;
- and
- a sheath coaxially disposed about the needle and slideable along the needle.
A method for placing a medical article within a body space, the method comprising penetrating a blood vessel with an access device, the access device comprising a syringe, a needle extending from the syringe, and a sheath coaxially disposed about the syringe, the syringe having a channel in flow communication with the needle;
- feeding a guide wire through the channel, the needle, and into the blood vessel;
- sliding the sheath along the needle in a distal direction until at least a portion of the sheath is disposed in the blood vessel;
- and
- removing the syringe, the needle, and the guide wire from the blood vessel leaving the sheath.
Dependencies are inferred from the claim text.