Needle safety systems
Inventors
Rousche, Patrick • VENTURA, Charles • Hensel, Adam • Macy, Todd • Browka, Edward
Assignees
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Publication Number
US-12121405-B2
Publication Date
2024-10-22
Expiration Date
Abstract
Tissue access devices and methods of using and making the same are disclosed. The devices can have a needle, a housing having wings, a tube having a flow channel, a tube first extension, and a tube second extension, and a torsion spring having a first coil and a second coil. The first coil can have a first coil first arm and a first coil second arm. The first coil first arm can be shorter than the first coil second arm. The second coil can have a second coil first arm and a second coil second arm. The second coil first arm can be shorter than the second coil second arm. The devices can have a sensor. More energy can stored in the torsion spring when the sensor is in a sensor closed configuration than when the sensor is in a sensor open configuration.
Core Innovation
The invention is a tissue access device for vascular/tissue access that includes a needle, a housing having wings, and a tube having a flow channel, a tube first extension, and a tube second extension. The device further includes a sensor having a first connector, a second connector, and an occluder, with the sensor in a sensor open configuration and a sensor closed configuration.
The torsion spring includes a first coil and a second coil, and in a fully assembled configuration the tube first extension is positioned in the first connector extension or first hinge and the tube second extension is positioned in the second connector extension or second hinge. The sensor state changes torsion spring loading such that the torsion spring has a first loaded configuration when the sensor is in the sensor open configuration and a second loaded configuration when the sensor is in the sensor closed configuration.
More energy is stored in the torsion spring when the torsion spring is in the second loaded configuration than when the torsion spring is in the first loaded configuration. The occluder is configured to restrict, terminate, or occlude flow through the device flow path or flow channel, and the disclosure includes multiple configurations of occlusion behavior and mechanical relationships involving the torsion spring coils, arms, and hinge connections.
Claims Coverage
The independent claims center on a tissue access device in which sensor open versus sensor closed configurations produce different torsion-spring or spring loading configurations, with stated energy relationships between the loaded configurations and a flow-affecting occluder.
Sensor open and closed configurations with occluder-connected connectors
A sensor having a first connector, a second connector, and an occluder, wherein the occluder is connected to the first connector and the second connector, and the sensor has a sensor open configuration and a sensor closed configuration.
Tube extensions positioned into connectors and torsion spring loading based on sensor open and closed configurations
A tissue access device with a needle, a housing having wings, and a tube having a flow channel with a tube first extension and a tube second extension, where when the device is in a fully assembled configuration the tube first extension is in the first connector extension or first hinge and the tube second extension is in the second connector extension or second hinge, and where the sensor has a sensor open configuration and a sensor closed configuration that correspond to a first loaded configuration and a second loaded configuration of the torsion spring, with more energy stored in the second loaded configuration than in the first loaded configuration.
Torsion spring arm lengths and sensor hinges controlling loaded configurations with more energy in the closed configuration
A tissue access device where the torsion spring has a first coil, a second coil, a first arm, a second arm, and a third arm, with the third arm longer than the first arm and longer than the second arm, and where the tube first extension is in the first hinge and the tube second extension is in the second hinge in a fully assembled configuration, and the sensor open configuration and sensor closed configuration correspond to a first loaded configuration and a second loaded configuration, with more energy stored in the torsion spring in the second loaded configuration than in the first loaded configuration.
Spring connected to sensor hinges via tube extensions with less energy stored in the open configuration
A tissue access device where a spring is on a first lateral side of the housing and on a second lateral side of the housing, and where in a fully assembled configuration the tube first extension and the spring are connected to the first hinge and the tube second extension and the spring are connected to the second hinge, and the sensor open configuration and sensor closed configuration correspond to a first loaded configuration and a second loaded configuration, with less energy stored in the spring in the first loaded configuration than in the second loaded configuration.
Across the independent claims, the claim coverage centers on a tissue access device in which a sensor open configuration versus a sensor closed configuration produces a first versus second loaded configuration of a torsion spring or spring, with stated comparisons of stored energy between the loaded configurations. The claims further require a specific fully assembled positional relationship between tube first and second extensions and sensor connectors or hinges.
Stated Advantages
automatic flow termination by interrupting fluid flow through a restricted/terminated flow path
needle safety by detecting needle dislodgement and responding with occlusion/flow interruption
more energy is stored in the torsion spring when the torsion spring is in the second loaded configuration than when the torsion spring is in the first loaded configuration
less energy is stored in the spring when the spring is in the first loaded configuration than when the spring is in the second loaded configuration
Documented Applications
vascular/tissue access to detect needle dislodgement and interrupt fluid flow
fluid delivery/withdrawal using a tissue access device with a tube flow channel
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