Access device
OwnerSteven F Biermaninventor
Life of this patent
Estimating the term…
Abstract
An access device places a medical article within a body space of a patient. The device has a needle that includes an elongated body and a needle hub. The medical article is disposed over and slideable over the needle. A flash space is provided anywhere between the needle and the outer surface of the medical article. The flash space communicates with a bore of the needle, as well as a variable volume chamber. The variable volume chamber can then draw fluid from the flash space into the chamber.
Claims54
An access device for placing a medical article within a body space, comprising:
- a needle comprising a bore;
- a medical article disposed over at least a portion of the needle and comprising an outer surface;
- a flash space disposed between the needle and the outer surface of the medical article, the flash space communicating with the bore of the needle;
- and
- a variable volume chamber communicating with the flash space so as to draw fluid from the flash space into the chamber.
An access device for placing a medical article within a body space, comprising:
- a needle comprising a bore;
- a medical article disposed over at least a portion of the needle and comprising an outer surface;
- a flash space disposed between the needle and the outer surface of the medical article, the flash space communication with the bore of the needle;
- an extended passage in communication with the flash space at a first end and further comprising a second end;
- a negative pressure element in communication with the second end of the tube;
- and
- a filtering member in at least one of the negative pressure element, passage, or flash space allowing the transit of air but inhibiting the transit of a body fluid.
A method for accessing a body cavity comprising:
- inserting an access device into a body cavity, the access device comprising a needle, a medical article, a flash space disposed between the needle and an outer surface of the medical article, and a variable volume chamber in communication with the flash space, wherein the variable volume chamber is in a contracted, lower volume position;
- expanding the volume of the variable volume chamber to produce a negative pressure in the variable volume chamber sufficient to draw a body fluid from the body cavity into the flash space;
- and
- observing the body fluid in the flash space from outside the access device.
An access device for placing a catheter within a body space, comprising:
- a needle comprising an elongated body with a distal end, a hub from which the needle body extends, and a locking structure disposed on the hub;
- and
- a catheter disposed on the needle body and movable relative to the needle body, the catheter comprising a flexible catheter body and a locking structure configured to interengage with the needle locking structure to hinder relative movement between the needle and the catheter, the catheter locking structure also being configured to interengage with a medical fitting,
- wherein the access device lacks a dilator between the needle and the catheter.
An access device for placing a catheter within a body space, comprising:
- a needle comprising an elongated body with a distal end, a hub from which the needle body extends, and a locking structure disposed on the hub;
- a catheter at least partially disposed on the needle body and comprising an elongated catheter body being at least partially translucent or transparent, and a hub from which the catheter body extends, the hub including locking structure configured to releasably lock with the needle locking structure to prevent unintentional gross relative movement between the needle and the catheter and configured to release from the needle locking structure to allow the needle to slide relative to the catheter;
- a flash space disposed between the needle and an exterior surface of the catheter body, the flash space communicating with an interior of the needle body so that body fluid within the needle body flows into the space and is visible through the translucent or transparent portion of the catheter body;
- and
- a guidewire preloaded into the needle, the guidewire having a length greater than the length of the needle body and being slideable through the needle body.
Dependencies are inferred from the claim text.