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US 2022/0176079 A1Published application
Blood collection devices, systems, and methods
AssigneeAvia Vascular, LLC
InventorKevin Jerry Cook
Life of this patent
Estimating the term…
Abstract
An access system can include a connector couplable with a catheter assembly having a catheter tube that can be positioned in a blood vessel of a patient. The access system can include a reinforcement member and a cannula couplable with a fluid collection device. The cannula can include a polymeric tube that defines a distal tip and a support tube that is stiffer than the polymeric tube and encompasses a portion of the polymeric tube. The support tube can define an inner diameter that is marginally larger than an outer diameter of the polymeric tube so as to prevent kinking of the portion of the polymeric tube that is encompassed by the support tube when the polymeric tube experiences proximally and distally directed compressive forces.
Claims26
An access system comprising:
- a connector configured to couple with a catheter assembly that comprises a catheter tube configured to be positioned in a blood vessel of a patient;
- a reinforcement member fixedly secured to the connector, the reinforcement member being longitudinally elongated;
- and
- a cannula configured to couple with a fluid collection device, the cannula being longitudinally movable relative to the connector and the reinforcement member such that a portion of the cannula passes through the reinforcement member as the cannula is moved from a retracted position to an advanced position, the cannula comprising:
- a polymeric tube that defines a distal tip;
- and
- a support tube that is stiffer than the polymeric tube and encompasses a portion of the polymeric tube, the support tube defining an inner diameter that is marginally larger than an outer diameter of the polymeric tube so as to prevent kinking of the portion of the polymeric tube that is encompassed by the support tube when the polymeric tube experiences proximally and distally directed compressive forces, the support tube being in a fixed relationship with the polymeric tube so as to move in unison with the polymeric tube as the cannula is moved from the retracted position to the advanced position, the support tube defining a distal edge that encircles the polymeric tube and is proximally spaced from the distal tip of the polymeric tube, the distal edge of the support tube being positioned within the reinforcement member when the cannula is in the retracted position,
- wherein, when the connector and the catheter assembly are in a coupled state, the distal tip of the polymeric tube is configured to be advanced through the catheter tube and beyond a distal tip of the catheter tube to a position within the blood vessel of the patient as the cannula is transitioned from the retracted position to the advanced position, and
- wherein, when the cannula is in the advanced position, the cannula permits blood to be drawn from the blood vessel of the patient through the cannula.
6 more elements
A method comprising:
- coupling a connector of an access system with a catheter assembly that comprises a catheter tube that is positioned in a blood vessel of a patient, the access system further comprising:
- a reinforcement member fixedly secured to the connector, the reinforcement member being longitudinally elongated;
- and
- a cannula configured to couple with a fluid collection device, the cannula being longitudinally movable relative to the connector and the reinforcement member such that a portion of the cannula passes through the reinforcement member as the cannula is moved from a retracted position to an advanced position, the cannula comprising:
- a polymeric tube that defines a distal tip;
- and
- a support tube that is stiffer than the polymeric tube and encompasses a portion of the polymeric tube, the support tube defining an inner diameter that is marginally larger than an outer diameter of the polymeric tube so as to prevent kinking of the portion of the polymeric tube that is encompassed by the support tube when the polymeric tube experiences proximally and distally directed compressive forces, the support tube being in a fixed relationship with the polymeric tube so as to move in unison with the polymeric tube as the cannula is moved from the retracted position to the advanced position, the support tube defining a distal edge that encircles the polymeric tube and is proximally spaced from the distal tip of the polymeric tube, the distal edge of the support tube being positioned within the reinforcement member when the cannula is in the retracted position;
- moving the cannula from the retracted position to the advanced position such that the distal tip of the polymeric tube advances through the catheter tube and beyond a distal tip of the catheter tube to a position within the blood vessel of the patient;
- and
- drawing blood from the blood vessel of the patient through the cannula.
7 more elements
Dependencies are inferred from the claim text.