Abstract: A system can include a housing that can be coupled with a base catheter. The system can further include an access catheter of which a first portion is positioned within the housing and a second portion extends out of the housing through an opening when the access catheter is in a retracted position. The system can further include a stiffener encompassing at least a portion of the second portion of the access catheter, and the stiffener can be graspable at an exterior of the housing for application of force thereto to advance the access catheter from the retracted position to an extended position. When the housing is coupled to the base catheter, the first portion of the access catheter can be advanced through at least a portion of the base catheter as the access catheter is advanced to the extended position.

Abstract: A blood collection system can include a cannula for insertion into a catheter system that comprises a hub with an internal chamber, a distal port in fluid communication with the internal chamber and coupled with a catheter tube that can be preplaced in a blood vessel of a patient, and an access port in fluid communication with the internal chamber. The cannula can be inserted in the catheter tube and can include a distal opening that is positioned within the blood vessel of a patient and is in fluid communication with an interior of the blood vessel to permit blood to flow into a lumen of the cannula, and can include a proximal opening positioned within the internal chamber to permit blood to flow from the cannula into the internal chamber and through the access port of the hub.

Abstract: In certain instances, an access system includes a connector to couple with a closed intravenous catheter system that includes a valve and a catheter tube. The access system can include a reinforcement member fixedly secured to the connector so as to be immobile relative thereto and oriented such that when the connector is coupled with the closed intravenous catheter system, a distal tip of the reinforcement member is at or proximally spaced from a proximal surface of the valve. The access system can include a cannula movable relative to the reinforcement member from a retracted position to an advanced position. At least a portion of the cannula can be advanced distally through the reinforcement member and then through the valve and subsequently into the catheter tube as the cannula is transitioned from the retracted position to the advanced position.

Abstract: In certain instances, an access system includes a connector to couple with a closed intravenous catheter system that includes a valve and a catheter tube. The access system can include a reinforcement member fixedly secured to the connector so as to be immobile relative thereto and oriented such that when the connector is coupled with the closed intravenous catheter system, a distal tip of the reinforcement member is at or proximally spaced from a proximal surface of the valve. The access system can include a cannula movable relative to the reinforcement member from a retracted position to an advanced position. At least a portion of the cannula can be advanced distally through the reinforcement member and then through the valve and subsequently into the catheter tube as the cannula is transitioned from the retracted position to the advanced position.

Abstract: In certain instances, an access system can include a connector to couple with a catheter assembly, a reinforcement member fixedly secured to the connector, and a cannula movable relative to the reinforcement member. The cannula can include a polymeric tube and a support tube that encompasses a portion of and is stiffer than the polymeric tube. The support tube can define an inner diameter that is marginally larger than an outer diameter of the polymeric tube to prevent kinking of the polymeric tube and can be in a fixed relationship with the polymeric tube. A distal edge of the support tube is proximally spaced from a distal tip of the polymeric tube and is within the reinforcement member when the distal tip of the polymeric tube is first positioned distal of and external to the reinforcement member as the cannula is advanced.

Abstract: In certain instances, an access system can include a connector to couple with a catheter assembly, a reinforcement member fixedly secured to the connector, and a cannula movable relative to the reinforcement member. The cannula can include a polymeric tube and a support tube that encompasses a portion of and is stiffer than the polymeric tube. The support tube can define an inner diameter that is marginally larger than an outer diameter of the polymeric tube to prevent kinking of the polymeric tube and can be in a fixed relationship with the polymeric tube. A distal edge of the support tube is proximally spaced from a distal tip of the polymeric tube and is within the reinforcement member when the distal tip of the polymeric tube is first positioned distal of and external to the reinforcement member as the cannula is advanced.

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.

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.

Abstract: An access system can include a connector for coupling with a catheter assembly having a catheter tube that can be positioned in a blood vessel of a patient, a reinforcement member fixedly secured to the connector, and a cannula movable relative to the reinforcement member from a retracted position in which at least a portion of the cannula is within the reinforcement member to an advanced position. The cannula can include a polymeric tube and a support tube that encompasses a portion of the polymeric tube. The support tube defines a distal edge that is within the reinforcement member when the distal tip of the polymeric tube is first positioned distal of and external to the reinforcement member as the cannula is transitioned from the retracted position to the advanced position.