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.
Claims18
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, the interior needle portion comprising an aperture extending through a side wall of the interior needle portion and into the fluid chamber;
- a needle hub disposed on an exterior needle portion extending from the barrel and being in flow communication with the interior needle portion and the fluid chamber, the needle hub comprising a first locking structure at a proximal part of the needle hub and a second locking structure at a distal part of the needle hub;
- 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;
- and
- a dilator disposed about the exterior needle portion and within the sheath, the dilator comprising a dilator hub and a dilator body, a distal end of the dilator body positioned distal to the distal end of the sheath,
- wherein the first locking structure is configured to releasably secure the needle hub to the barrel, and
- wherein the second locking structure is configured to releasably secure the needle hub to the dilator hub.
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, the needle comprising a first locking structure and a second locking structure, wherein the syringe comprises a barrel and a plunger slidingly disposed in the barrel, wherein the plunger comprises a valve and a valve channel in flow communication with the valve, the valve being configured to seal against the guide wire disposed in the valve channel;
- a sheath coaxially disposed about the needle and slideable along the needle;
- and
- a dilator disposed about the needle and within the sheath, a distal end of the dilator positioned distal to a distal end of the sheath,
- wherein the first locking structure is configured to releasably secure the needle to the syringe, and
- wherein the second locking structure is configured to releasably secure the needle to the dilator.
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 and a needle extending from the syringe, the syringe having a channel configured to receive a guide wire extending through the needle, the needle comprising a first locking structure and a second locking structure,
- a sheath coaxially disposed about the needle, and
- a dilator disposed about the needle and within the sheath, a distal end of the dilator positioned distal to a distal end of the sheath,
- wherein the first locking structure is configured to releasably secure the needle to the syringe, and
- wherein the second locking structure is configured to releasably secure the needle to the dilator;
- feeding the 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.