Needleless vial access device
AssigneeBaxter International Inc.
InventorsThomas E. Dudar, Peter L. Graham, Steven C. Jepson
Life of this patent
Estimating the term…
Abstract
A cannula assembly adapted to pierce a solid or unslit closure is disclosed and includes a blunt cannula and a piercing member held in cooperation with or contained within the flow channel of the cannula. Generally, the piercing member includes a tip capable of piercing an unslit stopper or closure and a means to temporarily retain the piercing member from the cannula and prevent inadvertent disengagement of the piercing member from the blunt cannula.
Claims37
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having
- a proximal end with an interior region and terminating with a luer flange for connection to an engaging structure,
- a generally cylindrical mid-region extending from the proximal end,
- an end region extending from the mid-region terminating in a blunt distal end and having a tapered outer surface,
- an internal flow channel extending through the end region and mid-region to communicate with the interior region of the proximal end region,
- an aperture at the outermost end of the cannula and in fluid communication with the internal flow channel,
- a piercing member in communication with the flow channel and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having
- a proximal end with an interior region and terminating with a luer flange for connection to a mating structure,
- a generally cylindrical mid-region extending from the proximal end,
- an end region extending from the mid-region terminating in a blunt distal end and having a tapered outer surface,
- an internal flow channel extending through the end region and mid-region to communicate with the interior region of the proximal end region,
- an aperture at the outermost end of the cannula and in fluid communication with the internal flow channel;
- a piercing member slidably cooperating with the flow channel, having
- a tip having a spike point, a body portion and a base,
- a shaft integral with and extending from the base of the tip;
- and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper having a blunt cannula with a blunt distal end, a proximal end and a mid-region connecting the distal and proximal ends with a stepped wall segregating the mid-region and proximal end, an interior region throughout the mid-region and terminating at each end defining a flow channel and a piercing member slidably cooperating with the flow channel, the piercing member comprising:
- a tip having a spike point, a generally conically shaped body and a base with at least one cutout through the body and base,
- a shaft having a squared portion integral with and extending from the base of the tip, terminating in a series of corners, a transition region tapering from the corners into a generally cylindrical extension to a proximal end and,
- means for providing an interference fit between the piercing member and the cannula.
A method of effecting a transfer of fluid from a drug vial having a solid stopper closure to a receiver using a cannula .assembly with a blunt cannula and a cooperating piercing member comprising the steps of:
- releasably connecting the cannula assembly to the receiver;
- positioning the connected cannula assembly at the center of the stopper and applying force for insertion of the assembly into and through the stopper;
- infusing fluid from the drug vial through the cannula assembly to the receiver;
- and,
- withdrawing the cannula assembly from the stopper so that the piercing member disengages from the cannula and the cannula is completely removed from the stopper.
A cannula assembly adapted to pierce a solid closure comprising:
- a blunt cannula having a proximal end and a distal end, an interior and exterior surface, an aperture at the distal end, and a central channel through the cannula in fluid communication with the aperture, the cannula has a generally cylindrical mid-region, the exterior surface of the cannula tapers inwardly from the mid-region of the cannula toward the aperture;
- a piercing member having opposed first and second ends, the first end extends through the aperture inside the central channel to define a void to allow for the flow of liquid or air, the second end of the piercing member being adjacent the cannula distal end;
- and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having a proximal end with an interior region, a generally cylindrical mid-region extending from the proximal end, an end region extending from the mid-region terminating in a blunt distal end and having a tapered outer surface, an internal flow channel extending through the end region and mid-region to communicate with the interior region of the proximal end region;
- a piercing member slidably cooperating with the flow channel, having a tip having a spike point, a body portion and a base, a shaft integral with and extending from the base of the tip, the shaft having a squared portion integral with the tip;
- and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having a proximal end with an interior region, a generally cylindrical mid-region extending from the proximal end, an end region extending from the mid-region terminating in a blunt distal end and having a tapered outer surface, an internal flow channel extending through the end region and mid-region to communicate with the interior region of the proximal end region;
- a piercing member slidably cooperating with the flow channel, having a tip having a spike point, a body portion and a base, a shaft integral with and extending from the base of the tip, the shaft having a thickened neck portion integral with the base of the tip;
- and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having a proximal end with an interior region, a generally cylindrical mid-region extending from the proximal end, an end region extending from the mid-region terminating in a blunt distal end and having a tapered outer surface, an internal flow channel extending through the end region and mid-region to communicate with the interior region of the proximal end region;
- a piercing member slidably cooperating with the flow channel, the piercing member having a tip having a spike point, a body portion and a base, a shaft integral with and extending from the base of the tip, the shaft having an outer diameter less than an inner diameter of the flow channel to define a void between the shaft and the channel to permit the flow of fluid or air through the void in the flow channel;
- and,
- means for providing an interference fit between the piercing member and the cannula.
A cannula assembly adapted to pierce a solid closure or stopper comprising:
- a blunt cannula having a proximal and distal end, a flow channel extending therewithin, and an aperture in fluid communication with the flow channel;
- a piercing member having a tip and a shaft extending from the tip, the shaft extends inside the flow channel to define a void to allow for the passage of fluid or air through the flow channel;
- and,
- means for providing an interference fit between the piercing member and the cannula.
Dependencies are inferred from the claim text.