Device and method for inserting a cannula to a predetermined depth within a bone, irrespective of the thickness of the tissue above the bone
Inventors
Tzachar, Barak • Kalnitskiy, Alexander • Gomberg, Yosef
Assignees
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Publication Number
US-11006933-B2
Publication Date
2021-05-18
Expiration Date
Abstract
An intraosseous device, comprising a cannula through which life-saving fluids are transfusible into or out of bone marrow of a target bone when the cannula is penetrated into the target bone; a stylet which is engageable with the cannula; and means for causing penetration of the stylet and cannula, when mutually engaged, to a predefined depth α within the target bone with respect to an outer surface of the target bone, the depth α being irrespective of a thickness of tissue above the target bone.
Core Innovation
The invention provides an intraosseous device for transfusing life-saving fluids into or out of bone marrow of a target bone. The device includes a cannula that is penetrated into the target bone and a stylet engageable with the cannula, and it automatically adjusts the depth of insertion of the stylet within the target bone to a thickness of tissue above the target bone.
The automatic depth adjustment comprises first driving means and second driving means. The first driving means drives a pointed object associated with the stylet to a point of contact with a surface of the target bone, while the second driving means is responsive to a triggered action.
At a retracted position, first and second reference elements are retained with the stylet and cannula, where the reference elements are spaced by a distance α. When the triggered action occurs, the second driving means transmits a force to a movable stylet-driving member that drives the stylet together with the cannula within the target bone until movement is limited by a force absorbing unit.
The distal tip of the stylet is penetrated to a predefined depth within the target bone relative to an outer surface equal to the distance α, and this penetration depth is irrespective of the thickness of tissue above the target bone.
Claims Coverage
The document includes two independent claims. The inventive features center on an intraosseous device and a method for inserting a cannula, both using automatic depth control with first and second driving means or reference elements, force transmission, and movement limited by a force absorbing unit to define a predefined penetration depth equal to a distance α irrespective of tissue thickness.
Cannula for transfusing life-saving fluids with engageable stylet depth control
An intraosseous device comprising a cannula through which life-saving fluids are transfusible into or out of bone marrow of a target bone when said cannula is penetrated into the target bone, and a stylet engageable with said cannula, with means for automatically adjusting a depth of insertion of said stylet within the target bone to a thickness of tissue above the target bone.
Two-stage driving using first and second driving means with reference element spacing α
Automatic adjusting means comprising first driving means operable to drive a pointed object associated with said stylet to a point of contact with a surface of the target bone, and second driving means responsive to a triggered action, with first and second reference elements retained in a retracted position spaced from each other by a distance α.
Force absorbing limitation to achieve predefined stylet penetration depth independent of tissue thickness
A force-transmission arrangement in which said second force transmitting unit transmits a force initiated by the triggered action to said stylet-driving member causing said stylet together with said cannula, when mutually engaged, to be driven within the target bone until movement of said stylet-driving member is limited by said force absorbing unit, where the distal tip of said stylet is penetrated within the target bone by a predefined depth with respect to an outer surface of the target bone equal to said distance α, said depth being irrespective of the thickness of tissue above the target bone.
Method using independently displaceable first and second reference elements with triggered second driving
A method for inserting a cannula within a bone comprising providing first and second reference elements independently displaceable from a retracted position to a driven position, distally driving a pointed object through body tissue until contact with an outer surface of a target bone, actuating a trigger, and distally driving said cannula with use of cooperating mechanical elements until movement is limited by a force absorbing unit connected to said distally driven pointed object, wherein the cannula is penetrated to a predefined depth irrespective of tissue thickness.
Claim coverage focuses on the intraosseous cannula and engageable stylet, automatic depth adjustment based on a tissue-related distance α established via first and second reference elements and first and second driving means, and depth attainment achieved by driving until limited by a force absorbing unit such that penetration depth is predefined and irrespective of overlying tissue thickness.
Stated Advantages
Provides a predefined stylet penetration depth within the target bone irrespective of the thickness of tissue above the target bone.
Automatically adjusts the depth of insertion of the stylet based on tissue thickness above the target bone.
Documented Applications
Insertion of an intraosseous cannula into a target bone for transfusing life-saving fluids into or out of bone marrow of the target bone.
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