Needle safety systems
Inventors
Rousche, Patrick • TEK, Peter • VENTURA, Charles • Scribner, Richard A. • Black, Andrew • Leopold, Andrew • Carlson, Mark • Macy, Todd • Lane, Daniel • Hensel, Adam • Browka, Edward
Assignees
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Publication Number
US-11446110-B2
Publication Date
2022-09-20
Expiration Date
Abstract
Tissue access devices and methods of using the same are disclosed. The devices can have a sensor configured to occlude a flow path by deflecting a membrane into the flow path when the devices become dislodged from tissue. The sensor can be configured to partially or fully occlude the flow path. The sensor can have a spring. The spring can be biased to move the sensor from a sensor first configuration to a sensor second configuration when a force applied by the sensor first surface against a non-sensor surface changes from a first force to a second force less than the first force. The membrane can be deflected into the flow path when the sensor is in the sensor second configuration.
Core Innovation
The patent describes a tissue access device having a needle, a housing with a housing opening and a housing conduit, and a deformable membrane that defines a portion of the housing conduit. A movable footplate is attached to the housing and includes a spring and an occluder. The movable footplate shifts between a footplate first configuration and a footplate second configuration based on a force applied by a footplate first surface against a non-footplate surface, with the spring biased to move the movable footplate from the first configuration to the second configuration when the force decreases.
In the footplate second configuration, at least a first portion of the occluder occludes the housing conduit. At least a second portion of the occluder is in the housing opening when the movable footplate is in the footplate second configuration and outside the housing opening when the movable footplate is in the footplate first configuration. The deformable membrane defines a portion of the housing conduit, and occlusion occurs through interaction between the occluder and the housing conduit portion defined by the deformable membrane.
Dependent refinements add a footplate distal end barrier configured to prevent over insertion of the needle into a vessel, and a footplate distal curved surface configured to reduce friction against the non-footplate surface when the needle is inserted into a vessel. In these refinements, at least a portion of the barrier or curved surface is closer to the needle when the moveable footplate is in the footplate first configuration than when the moveable footplate is in the footplate second configuration.
Claims Coverage
The consolidated content includes three independent inventive features. Each centers on a spring-biased movable footplate that changes configuration in response to a change in applied force, with configuration-dependent occlusion of the housing conduit and configuration-dependent positioning of an occluder portion relative to the housing opening. Additional claim features address a barrier to prevent over insertion and a curved surface to reduce friction.
Spring-biased movable footplate with force-threshold configuration change and occluder occlusion
A tissue access device having a needle, a housing with a housing opening and a housing conduit, a deformable membrane defining a portion of the housing conduit, and a movable footplate attached to the housing, where the movable footplate has a spring and an occluder and is moved between a footplate first configuration and a footplate second configuration when a force applied by the footplate first surface against a non-footplate surface changes from a first force to a second force less than the first force; at least a first portion of the occluder occludes the housing conduit when the movable footplate is in the footplate second configuration.
Occluder portion placement relative to housing opening across configurations
At least a second portion of the occluder is in the housing opening when the movable footplate is in the footplate second configuration and outside the housing opening when the movable footplate is in the footplate first configuration.
Configuration-dependent barrier to prevent over insertion
The footplate distal end comprises a barrier configured to prevent over insertion of the needle into a vessel, wherein at least a portion of the barrier is closer to the needle when the moveable footplate is in the footplate first configuration than when the moveable footplate is in the footplate second configuration.
Configuration-dependent curved surface to reduce friction during needle insertion
The footplate distal end has a curved surface configured to reduce friction against the non-footplate surface when the needle is inserted into a vessel, and wherein at least a portion of the curved surface is closer to the needle when the moveable footplate is in the footplate first configuration than when the moveable footplate is in the footplate second configuration.
The inventive coverage centers on a tissue access device in which a spring-biased movable footplate switches between configurations based on a change in applied force, causing an occluder to occlude the housing conduit in the second configuration and change placement relative to the housing opening. The remaining features are configuration-dependent barrier positioning for over-insertion prevention and a configuration-dependent curved surface for reducing friction during needle insertion.
Stated Advantages
A barrier is configured to prevent over insertion of the needle into a vessel.
A curved surface is configured to reduce friction against the non-footplate surface when the needle is inserted into a vessel.
Documented Applications
A tissue access device for use with a needle, including configuration-dependent occlusion of a housing conduit during tissue access.
A vessel access device for use with a needle, including configuration-dependent occlusion of a housing conduit during vessel access.
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