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Publication Number
US-11839403-B2
Publication Date
2023-12-12
Expiration Date
Abstract
A cannula-stylet assembly for piercing tissues of a subject's body includes a stylet that is significantly longer than the cannula. The length of the stylet enables introduction of the stylet through the length of both the cannula and a gripping device that has been coupled to a proximal end of the cannula. A medical piercing system may include a cannula-stylet assembly with a long stylet and a gripping device that may remain assembled with the cannula when the stylet is removed from the cannula or a gripping device that remains assembled with a stylet of a conventionally configured cannula-stylet assembly when the stylet is removed from the cannula.
Core Innovation
A cannula-stylet assembly is described in which a cannula has a first length and includes a piercing element at a distal end and a hub at a proximal end that couples to and uncouples from a distal side of a gripping device. A stylet has a piercing element at a distal end and a hub at a proximal end, with the stylet piercing element insertable into the gripping device and the stylet hub securable to a proximal side of the gripping device. The stylet has a second length that is at least as long as a combined length of an assembly including the cannula and the gripping device.
The assembly further includes hub configurations enabling one of the cannula and the stylet to rotate while another of the cannula and the stylet remains rotationally stationary relative to the gripping device. A medical piercing system is also described in which a hand-held, manually operable rooter includes a drive shaft that is rotatable relative to a remainder of the rooter, with an axis of rotation extending through the length of the drive shaft. In this system, one of the cannula and the stylet is coupled to the drive shaft so that the one rotates while the other remains rotationally stationary relative to the gripping device.
The document describes structural variations for piercing elements and coupling features, including distal piercing element geometries and hub coupling configurations such as complementary couplers, including male/female couplers and luer-type couplers. Exemplary gripping devices include a hand-held manually operable spinning/rooter with a ratcheting actuator supporting rotation of one or both of the cannula and the stylet during insertion.
The document also describes coupling/disassembly behavior in which, in one embodiment, the gripping device remains coupled to the cannula when the stylet is removed and is reassembled by replacing the stylet, while conventional-length embodiments require uncoupling when the stylet is removed.
Claims Coverage
The independent claims cover three related aspects of a medical piercing system: a cannula-stylet assembly with a length relationship and rotationally selective hub configurations, and a hand-held manually operable rooter system with drive-shaft-dependent rotation between the cannula and the stylet.
Stylet length at least as long as cannula plus gripping device and securable hubs for rotation control
A cannula-stylet assembly comprising a cannula with a piercing element at a distal end and a hub at a proximal end that couples to and uncouples from a distal side of a gripping device; and a stylet with a piercing element at a distal end and a hub at a proximal end that inserts the piercing element into the gripping device and securable to a proximal side of the gripping device, wherein the stylet has a second length at least as long as a combined length of an assembly including the cannula and the gripping device, and wherein the hub of the cannula and the hub of the stylet have configurations that enable one of the cannula and the stylet to rotate while another remains rotationally stationary relative to the gripping device.
Hand-held manually operable rooter with rotatable drive shaft and rotationally selective coupling of cannula and stylet
A medical piercing system comprising a gripping device comprising a hand-held, manually operable rooter with a drive shaft rotatable relative to a remainder of the hand-held, manually operable rooter and having an axis of rotation extending through a length of the drive shaft; a cannula; and a stylet, wherein one of the cannula and the stylet is coupled to the drive shaft of the hand-held, manually operable rooter to rotate the one while another remains rotationally stationary relative to the gripping device.
Drive-shaft rotation with hub-configured cannula hub and stylet hub enabling one rotates while the other remains stationary
A medical piercing system comprising a gripping device comprising a hand-held, manually operable rooter including a drive shaft extending along a length of the hand-held, manually operable rooter and a conduit extending through a length of the drive shaft, the drive shaft rotatable relative to a remainder of the hand-held, manually operable rooter and having an axis of rotation extending through the length of the drive shaft; a cannula with a cannula hub at a proximal end of the cannula that couples to and uncouples from a distal side of the hand-held, manually operable rooter; and a stylet with a stylet hub at a proximal end of the stylet that couples to and uncouples from a proximal side of the hand-held, manually operable rooter, wherein the cannula hub, the gripping device, and the stylet hub have configurations that enable one of the cannula and the stylet to rotate while another remains rotationally stationary relative to the gripping device.
Specific proximal-side and distal-side hub coupling chain between drive shaft, stylet hub, and cannula hub enabling rotationally selective rotation
A medical piercing system comprising a gripping device comprising a hand-held, manually operable rooter including a drive shaft extending along a length of the hand-held, manually operable rooter; a stylet with a stylet hub at a proximal end of the stylet, the stylet hub having a proximal side that couples to a distal side of the drive shaft of the hand-held, manually operable rooter; and a cannula with a cannula hub at a proximal end of the cannula, the cannula hub having a distal side that couples to a proximal side of the stylet hub, wherein the cannula hub, the gripping device, and the stylet hub have configurations that enable one of the cannula and the stylet to rotate while another remains rotationally stationary relative to the gripping device.
Across the independent claims, the coverage is centered on coupling arrangements at hub and/or coupler interfaces that enable selective rotation between the cannula and the stylet relative to a gripping device, including a length relationship in the cannula-stylet assembly and a drive-shaft-based rotation in the medical piercing system.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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