Devices for minimally invasive procedures
Inventors
Raina, Aniruddha • Rioux, Robert F. • Wilson, Christopher • Youssef, Jim A.
Assignees
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Publication Number
US-11564719-B2
Publication Date
2023-01-31
Expiration Date
Abstract
The invention relates to an assembly for use in minimally invasive surgical procedures, including bone implant fixation procedures. The assembly is configured to provide a faster and more accurate measurement of depth of holes for placement of bone screws and fasteners. The assembly includes a guidewire having a deployable distal hook member configured to securely anchor into a desired position relative to a hole drilled in a bone and thereby provide an accurate datum for a measuring instrument for determining a depth of the hole for subsequent screw placement. The assembly further includes a surgical depth instrument to cooperatively function with the guidewire and obtain one or more measurements while operably coupled to the guidewire.
Core Innovation
The invention addresses measurement of a hole formed in a bone by using a guidewire having a deployable hook member. The hook member transitions between a delivery configuration with a first diameter and a deployed configuration with a second diameter greater than the first diameter, so that the hook member is positioned within the hole and then anchored at a position relative to the hole. The anchored hook member provides a fixed location for subsequent depth measurement.
After anchoring, a surgical depth instrument comprising a sleeve member and a probe member cooperatively coupled thereto is introduced to the hole. The sleeve member has a bore configured to receive the guidewire and a distal end configured to engage an opening of the hole upon movement of the sleeve member towards the hole. The distal end of the sleeve member includes one or more protrusions configured to establish purchase with an interior surface of the hole upon rotation of the sleeve member, thereby defining a reference geometry for obtaining measurements based on engagement between the probe distal tip and the hook member.
Depth measurement is obtained at least in part based on engagement between the distal tip of the probe member and the hook member when the hook member is in the deployed configuration. The method includes receiving the guidewire in the bore so that the sleeve member is slidably mounted to the guidewire, moving the sleeve member and the probe member relative to the hook member along an axis of the guidewire toward the hole, engaging the opening with the sleeve member, rotating the sleeve member to establish purchase, and obtaining at least one measurement based on the engagement between the distal tip of the probe member and the hook member.
Claims Coverage
The partial content includes one independent claim and describes dependent claim coverage refinements. The independent claim comprises 1 inventive-method framework using a deployable hook guidewire to anchor a datum within the bone hole and a sleeve-and-probe depth instrument that measures based on probe-to-hook engagement while the sleeve establishes purchase at the hole opening.
Deployable hook guidewire with delivery to deployed transition
A guidewire comprising a deployable hook member configured to transition between a delivery configuration with a first diameter and a deployed configuration with a second diameter greater than the first diameter, wherein the hook member is positioned within and moves through the hole, and transitioning to the deployed configuration anchors the hook member at a position relative to the hole.
Surgical depth instrument with sleeve bore and purchase-protrusions
A surgical depth instrument comprising a sleeve member and a probe member cooperatively coupled thereto, wherein the sleeve member has a distal end, a proximal end, and a bore extending from the distal end to the proximal end configured to receive the guidewire, wherein the distal end of the sleeve member engages an opening of the hole upon movement towards the hole, and wherein the distal end of the sleeve member comprises one or more protrusions configured to establish purchase with a portion of the interior surface of the hole upon rotation of the sleeve member.
Depth measurement by probe distal tip engagement with deployed hook
A depth measurement configuration in which the sleeve member and probe member move relative to the hook member along an axis of the guidewire, and wherein the surgical depth instrument is configured to obtain at least one measurement of the hole based, at least in part, on engagement between a distal tip of the probe member and the hook member when the hook member is in the deployed configuration.
Slidably mounting sleeve to guidewire via bore
Receiving the guidewire in the bore of the sleeve member thereby slidably mounting the sleeve member to the guidewire.
Relative movement along guidewire axis to engage and measure
Moving the sleeve member and the probe member relative to the hook member along an axis of the guidewire towards the hole, engaging an opening of the hole with the sleeve member, rotating the sleeve member thereby establishing purchase with a portion of the interior surface of the hole, and obtaining at least one measurement based on engagement between the distal tip of the probe member and the hook member.
Overall claim coverage centers on anchoring a measurement datum using a deployable hook guidewire with a delivery-to-deployed diameter transition, then obtaining a hole measurement using a sleeve-and-probe depth instrument whose probe distal tip engages the deployed hook while the sleeve member establishes purchase at the hole opening. The dependent claim coverage described in the provided family summary further specifies additional structural and signal/display aspects.
Stated Advantages
Documented Applications
No documented applications found
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