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5.The surgical device of claim 1, wherein the electronic circuit comprises a sensor configured to determine a horizontal plane and the electronic circuit determines the reference axis relative to the horizontal plane. |
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6.The surgical device of claim 1, comprising a linear measurement circuit configured to measure a linear distance between the surgical device and a second surgical device. |
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7.The surgical device of claim 1, wherein the output device comprises an audio output device configured to provide one or more audio signals that communicate the orientation angle. |
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8.The surgical device of claim 1, comprising non-volatile storage media configured to store data for the reference axis and wherein the electronic circuit determines the reference axis based on the data for the reference axis. |
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9. The surgical device of claim 1, wherein the measurement circuit comprises a sensor configured to detect a change in orientation of the shaft. |
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10. The surgical device of claim 1, wherein the measurement circuit is configured to measure an orientation of the shaft in response to user input data. |
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11. The surgical device of claim 1, wherein the measurement circuit is configured to measure an orientation of the shaft as a user tilts the shaft to a desired orientation. |
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12. The surgical device of claim 1, wherein the shaft comprises a head near the proximal end, the head configured to receive a strike and the bone probe is configured to penetrate cortical bone in response to the strike. |
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13. The surgical device of claim 1, wherein the shaft is cannulated from the proximal end to the distal end and configured to accept one or more of a K-wire, a bone bore, an awl, a pedicle probe, a pedicle implant, and a pedicle inserter. |
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14. A surgical device for intraoperative angle measurements during surgery on a patient, the surgical device comprising: |
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a distal end opposite the proximal end, the distal end configured to contact cortical bone of a patient; and |
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an electronic circuit coupled to the shaft, the electronic circuit configured to measure an orientation angle, the electronic circuit comprising: |
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a zero-out switch configured to convey a zero-out signal; |
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a calibration circuit configured to determine a reference axis for the electronic circuit in response to the zero-out signal; |
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a measurement circuit configured to measure an orientation of the shaft in relation to the reference axis as a user tilts the shaft to a desired orientation, the measurement circuit comprising an orientation sensor; |
201 |
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a control circuit coupled to the zero-out switch, calibration circuit, and measurement circuit and configured to determine an orientation angle of the shaft relative to the reference axis; |
202 |
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a display device coupled to the control circuit and configured to display the orientation angle to a user; and |
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a power supply configured to provide electric current to the electronic circuit. |
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15.The surgical device of claim 14, comprising: |
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a housing that comprises the electronic circuit and the power supply; |
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