Bone oxygenation measurement
First Claim
1. A medical device comprising a probe for making an oxygen saturation measurement for a bone, the probe comprising:
- a rigid elongated member, wherein the rigid elongated member comprises a proximal end, a distal end opposite the proximal end, and a smooth outer surface therebetween;
a sensor head, coupled to the distal end of the rigid elongated member, wherein the sensor head comprises;
first and second openings; and
first and second fiber optic cables, wherein the first fiber optic cable is coupled to the first opening, and the second fiber optic cable is coupled to the second opening, andwherein the sensor head is positioned so that light directed into the bone via the first fiber optic cable travels in a first direction from the proximal end towards the distal end and exits the first opening in the first direction, and light reflected from the bone enters the second opening in a second direction, and travels from the distal end towards the proximal end in the second direction and through the second fiber optic cable;
a flexible tube, extending from the proximal end of the rigid elongated member; and
a connector, coupled to the flexible tube.
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Abstract
A bone oximeter probe includes an elongated member and a sensor head at an end of the elongated member to make measurements for a bone. The measurements can indicate the viability or nonviability of the bone. In an implementation, the probe is advanced through an incision in soft tissue, towards the underlying bone, and positioned so that the sensor head faces the bone to be measured. Optical signals are sent from the sensor head and into the bone. The bone reflects some of the optical signals which are then detected so that measurements for the bone can be made. Some of these measurements include an oxygen saturation level value, and a total hemoglobin concentration value of the bone.
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Citations
20 Claims
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1. A medical device comprising a probe for making an oxygen saturation measurement for a bone, the probe comprising:
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a rigid elongated member, wherein the rigid elongated member comprises a proximal end, a distal end opposite the proximal end, and a smooth outer surface therebetween; a sensor head, coupled to the distal end of the rigid elongated member, wherein the sensor head comprises; first and second openings; and first and second fiber optic cables, wherein the first fiber optic cable is coupled to the first opening, and the second fiber optic cable is coupled to the second opening, and wherein the sensor head is positioned so that light directed into the bone via the first fiber optic cable travels in a first direction from the proximal end towards the distal end and exits the first opening in the first direction, and light reflected from the bone enters the second opening in a second direction, and travels from the distal end towards the proximal end in the second direction and through the second fiber optic cable; a flexible tube, extending from the proximal end of the rigid elongated member; and a connector, coupled to the flexible tube. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device probe for making a bone oxygen saturation measurement, the probe comprising:
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an elongated member, wherein the elongated member comprises a proximal end, and a distal end, opposite the proximal end; a sensor head, coupled to the elongated member closer to the distal end than the proximal end of the elongated member, wherein the sensor head comprises; first and second openings; and first and second fiber optic cables, wherein the first fiber optic cable is coupled to the first opening, and the second fiber optic cable is coupled to the second opening, and wherein the sensor head is positioned so that light directed into a bone to be measured via the first fiber optic cable travels through the cable to the sensor head and exits the first opening into the bone in a first direction, and light reflected from the bone enters the second opening in a second direction, and travels through the second fiber optic cable in a direction opposite a transmission path of the first light signal; a flexible tube, slidably extending from the proximal end of the elongated member; and a connector, coupled to the flexible tube. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification