Muscular-skeletal joint stability detection and method therefor
First Claim
1. A system for detecting orthopedic bond integrity comprising:
- an orthopedic bond configured to couple an orthopedic device to a musculoskeletal system; and
one or more sensors configured to receive one or more pulses that traverse the orthopedic bond wherein measurement data from the sensor is configured to detect micro-motion in the orthopedic bond; and
a filter configured to filter frequencies above 1000 Hertz from the measurement data.
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Accused Products
Abstract
An orthopedic implant having a three-axis accelerometer is disclosed. The three-axis accelerometer is used to detect micro-motion in the implant. The micro-motion can be due to loosening of the implant. The implant is configured to couple to the muscular-skeletal system. In one embodiment, the implant is configured to couple to bone. An impact force is imparted to the bone or implant. The impact force can be provided via a transducer coupled to the implant. In the example, the impact force is imparted along a single axis. The three-axis accelerometer measures the impact force along each axis. Resultant peaks of the quantitative measurement and the frequencies at which they occur are measured. The peaks and frequencies of the measurements correspond to micro-motion. Typically, the frequency of interest is less than 1 KHz to determine if micro-motion is occurring.
179 Citations
20 Claims
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1. A system for detecting orthopedic bond integrity comprising:
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an orthopedic bond configured to couple an orthopedic device to a musculoskeletal system; and one or more sensors configured to receive one or more pulses that traverse the orthopedic bond wherein measurement data from the sensor is configured to detect micro-motion in the orthopedic bond; and a filter configured to filter frequencies above 1000 Hertz from the measurement data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for detecting orthopedic bond integrity comprising:
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an orthopedic bond configured to couple an orthopedic device to a musculoskeletal system; and one or more sensors configured to receive one or more pulses that traverse the orthopedic bond wherein measurement data from the sensor is configured to detect micro-motion in the orthopedic bond; and a bandpass filter configured to have an upper pass range of 1000 Hertz. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for determining interface stability between an orthopedic implant and a muscular-skeletal system comprising the steps of:
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measuring a pulse after traversing an orthopedic bond along an x-axis, a y-axis, and a z-axis; filtering the pulse to pass frequencies less than 1000 Hz; and identifying peaks less than a predetermined threshold that correspond to bond strength of the orthopedic bond.
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Specification