Tissue retractor oximeter
First Claim
Patent Images
1. A device comprising:
- a shaft, comprising a first bend, wherein from a distal end of the shaft to the first bend, the shaft extends in a first direction, and from the first bend to a proximal end of the shaft, the shaft extends in a second direction, which is different from the first direction;
a handle, coupled to a proximal end of the shaft, extending in a second direction;
a tip, coupled to a distal end of the shaft, comprising a retractor portion and an oximeter sensor on a bottom surface of the tip, wherein the retractor portion comprises a blade having a first edge and a second edge, opposite to the first edge, a first thickness between the first and second edges, the first edge has a first length that is greater than the first thickness, the first edge is closer to the bottom surface than the second edge, and the blade extends from the bottom surface in a third direction away from an axis that passes through the shaft;
a first optical fiber;
a second optical fiber, wherein the first optical fiber passes through a channel in the shaft and a distal end of the first optical fiber is coupled to a first sensor opening of the tip, and the second optical fiber passes through the channel in the shaft and a distal end of the second optical fiber is coupled to a second sensor opening of the tip,the first sensor opening is positioned on the bottom surface of the tip a first distance from the first edge, the second sensor opening is positioned on the bottom surface of the tip a second distance from the first edge, and the first distance is the same as the second distance; and
a system unit comprising a display, processor, signal emitter circuit, signal detector circuit, and a receptacle to couple to proximal ends of the first and second optical fibers, wherein the signal emitter circuit sends a signal through the first optical fiber and the signal detector circuit receives the signal from the second optical fiber.
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Accused Products
Abstract
A retractor has an oximeter sensor at its tip, which allows measuring of oxygen saturation of a tissue being retracted by the retractor. The tip includes one or more openings for at least one source and detector. A specific implementation is a spinal nerve root retractor with an oximeter sensor.
48 Citations
37 Claims
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1. A device comprising:
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a shaft, comprising a first bend, wherein from a distal end of the shaft to the first bend, the shaft extends in a first direction, and from the first bend to a proximal end of the shaft, the shaft extends in a second direction, which is different from the first direction; a handle, coupled to a proximal end of the shaft, extending in a second direction; a tip, coupled to a distal end of the shaft, comprising a retractor portion and an oximeter sensor on a bottom surface of the tip, wherein the retractor portion comprises a blade having a first edge and a second edge, opposite to the first edge, a first thickness between the first and second edges, the first edge has a first length that is greater than the first thickness, the first edge is closer to the bottom surface than the second edge, and the blade extends from the bottom surface in a third direction away from an axis that passes through the shaft; a first optical fiber; a second optical fiber, wherein the first optical fiber passes through a channel in the shaft and a distal end of the first optical fiber is coupled to a first sensor opening of the tip, and the second optical fiber passes through the channel in the shaft and a distal end of the second optical fiber is coupled to a second sensor opening of the tip, the first sensor opening is positioned on the bottom surface of the tip a first distance from the first edge, the second sensor opening is positioned on the bottom surface of the tip a second distance from the first edge, and the first distance is the same as the second distance; and a system unit comprising a display, processor, signal emitter circuit, signal detector circuit, and a receptacle to couple to proximal ends of the first and second optical fibers, wherein the signal emitter circuit sends a signal through the first optical fiber and the signal detector circuit receives the signal from the second optical fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device comprising:
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a shaft; a handle, coupled to a proximal end of the shaft; and a tip, coupled to a distal end of the shaft, comprising a tissue oximeter sensor having a first opening and a second opening, wherein the first and second openings each have at least one light channel on a bottom surface of the tip, wherein the tissue oximeter sensor can make oxygen saturation measurements of tissue where there is no blood flow or pulse, an axis passes through the shaft, and the tip comprises a first portion extending a first distance from the axis in a first direction, a second portion extending a second distance from the axis a second direction that is opposite to the first direction, and a retractor blade of the tip extends across the axis so there are blade portions on opposite sides of the axis, wherein the retractor blade comprises a first edge and a second edge, opposite to the first edge, a first thickness between the first and second edges, the first edge has a first length that is greater than the first thickness, the first edge is closer to the bottom surface than the second edge, and the blade extends from the bottom surface in a third direction away from an axis that passes through the shaft, a sum of the first distance and the second distance is less than a width of the shaft, the first opening is positioned on the bottom surface of the tip a third distance from the first edge, the second opening is positioned on the bottom surface of the tip a fourth distance from the first edge, and the third distance is the same as the fourth distance, and at least one optical fiber is coupled to the opening of the tip, and the at least one optical fiber is entirely enclosed within an internal channel of the device from the opening of the tip to at least the proximal end of the shaft. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A device comprising:
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a tip comprising a retractor portion and an oximeter sensor formed on a bottom surface of the tip, wherein the retractor portion comprises a blade having a first edge that has a length greater than a thickness of the blade, and the blade extends from a tip of the first edge to the bottom surface, and from first edge to the bottom surface, the tip comprises a first turn in a first turn direction and the tip extends in a first direction; a shaft, comprising a second turn in the first turn direction, wherein a distal end of the shaft is coupled to the tip, and from the distal end of the shaft to the second turn of the shaft, the shaft extends in a first direction, and from the second turn to a proximal end of the shaft, the shaft extends in a second direction, which is different from the first direction; a handle, coupled to the proximal end of the shaft, wherein the handle extends from the proximal end of the shaft to a proximal end of the handle in the second direction, wherein a first axis of the first turn is transverse to a second axis passing through the shaft from the distal end of the shaft to a second turn; a first optical fiber; and a second optical fiber, wherein the first optical fiber passes through a channel in the shaft and a distal end of the first optical fiber is coupled to a first sensor opening of the tip, and the second optical fiber passes through the channel in the shaft and a distal end of the second optical fiber is coupled to a second sensor opening of the tip, the blade extends from the bottom surface in a third direction away from an axis that passes through the shaft, and the first sensor opening is positioned on the bottom surface of the tip a first distance from the first edge, the second sensor opening is positioned on the bottom surface of the tip a second distance from the first edge, and the first distance is the same as the second distance. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A device comprising:
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a shaft, comprising a first internal channel extending from a proximal end to a distal end of the shaft; a handle, coupled to a proximal end of the shaft, wherein the handle comprises an elongated member comprising; a second internal channel extending from a first end and to a second end of the handle that is opposite the first end; a first opening at the first end, coupled to the shaft; and a second opening at the second end, wherein the second internal channel is coupled to the first internal channel, and the second internal channel from the first end to the second end is linear; a tip, coupled to the distal end of the shaft, comprising a third internal channel coupled to the first internal channel, a retractor blade and an oximeter sensor, wherein the third internal channel extends through the tip to at least two sensor openings of the tip, and an axis of the shaft passes through the retractor blade, and the retractor blade comprises a first edge and a second edge, opposite to the first edge, a first thickness between the first and second edges, the first edge has a first length that is greater than the first thickness, the first edge is closer to a bottom surface of the tip than the second edge, and the blade extends from the bottom surface in a first direction away from the axis of the shaft; a first optical fiber; a second optical fiber, wherein the first optical fiber passes through the first, second, and third internal channels, and a distal end of the first optical fiber is coupled to a first sensor opening of the tip, and the second optical fiber passes through the first, second, and third internal channels and a distal end of the second optical fiber is coupled to a second sensor opening of the tip, and the first sensor opening is positioned on the bottom surface of the tip a first distance from the first edge, the second sensor opening is positioned on the bottom surface of the tip a second distance from the first edge, and the first distance is the same as the second distance; and a system unit comprising a display, processor, signal emitter circuit, signal detector circuit, and a receptacle to couple to proximal ends of the first and second optical fibers, wherein the signal emitter circuit sends a signal through the first optical fiber and the signal detector circuit receives the signal from the second optical fiber, and when the handle is moved in a second direction, the retractor blade of the tip moves in the second direction to cause a retraction of tissue, and when the handle is moved in a third direction, opposite the second direction, the retractor blade moves in the third direction to decrease a retraction distance. - View Dependent Claims (35, 36, 37)
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Specification