Surgical Systems and Methods for Determining Breakthrough Depth of Cutting Tools
AssigneeStryker Corporation
InventorsRahul Sharma, Trevor Jonathan Lambert
Life of this patent
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Abstract
A surgical system for determining breakthrough depth of a bore in a bone passing through a proximal cortical layer of bone and a distal cortical layer of bone. The surgical system includes an instrument for coupling to a cutting tool. A sensor is coupled to the instrument to generate one or more depth measurements of the cutting tool as the cutting tool cuts through the bone. The breakthrough depth is determined based on depth measurements made after the cutting tool passes through the proximal cortical layer of bone. The breakthrough depth is optionally based on a type of bone being cut, bone hardness, and cutting tool selection.
Claims20
A surgical system for cutting into a bone with a cutting tool, the surgical system comprising:
- a first sensor configured to output one or more displacement signals associated with a displacement of the cutting tool during a cutting process;
- and
- a controller configured to,
- determine displacement data of the cutting tool relative to the bone from an initial cutting time and a final cutting time, the displacement data including a displacement value indicative of a proximal surface of a proximal cortex of a bone and a displacement value indicative of a distal surface of a distal cortex of the bone,
- receive a proximal cortex threshold value, the proximal cortex threshold value being indicative of a displacement value that is distal the pro al cortex, and pro al the distal cortex,
- determine distal cortex acceleration data based on the displacement data, and
- determine a breakthrough depth of a bore based on the distal cortex acceleration data that is solely distal the proximal cortex threshold value.
The surgical system of claim 1, wherein the controller is further configured to perform as specified in claims 20-33.
16-54. (canceled)
A surgical system for cutting into a bone with a cutting tool, the surgical system comprising:
- a sensor configured to output one or more displacement signals associated with a displacement of the cutting tool during a cutting process;
- and
- a controller configured to,
- determine displacement data of the cutting tool relative to the bone from an initial cutting time and a final cutting time, the displacement data including a displacement value indicative of a proximal surface of a proximal cortex of a bone and a displacement value indicative of a distal surface of a distal cortex of the bone,
- determine distal cortex acceleration data based on the displacement data, and
- determine a breakthrough depth of a bore based on the distal cortex acceleration data that is solely distal a proximal cortex threshold value.
Dependencies are inferred from the claim text.