Using an oximeter probe to detect intestinal ischemia
First Claim
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1. A method comprising:
- providing a sensor probe comprising a first optical fiber, wherein the sensor probe is adapted to contact a serosal surface of a serosal tissue of an intestinal or mesentery tissue of a patient during a recovery from a temporary ischemic period, wherein the sensor probe is part of a needle sensor device comprising;
a hollow needle; and
the sensor probe, wherein distal ends of optical fibers are located at a tip of the sensor probe forming an oximeter sensor, and the sensor probe in a first mode, is disposed inside the hollow needle and, in a second mode, the sensor probe is extended past a distal end of the hollow needle to contact the serosal surface of the serosal tissue;
transmitting radiation into the first optical fiber;
emitting the radiation inside a body of the patient from the first optical fiber into the contacted serosal surface of the serosal tissue;
collecting reflected radiation from the contacted serosal surface of the serosal tissue by using a second optical fiber of the sensor probe;
by an electronic processor, using the collected reflected radiation from the second optical fiber to determine a rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period, after removing a constriction to a mesenteric artery; and
using the electronic processor, diagnosing the patient as having intestinal ischemia according to the rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period.
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Abstract
Devices and systems have a sensor probe configured to measure tissue oxygen saturation in the intestine or mesentery. The devices and systems can determine the oxygenation state of the entire thickness of the intestine or mesentery. Embodiments of the invention also include methods for inducing a temporary ischemic period in an intestine or mesentery tissue and analyzing changes in oxygen saturation of the tissue during the temporary ischemic period or during a recovery phase. The devices, systems, and methods can be applied in diagnosing intestinal ischemia in a patient, as well as in monitoring tissue oxygen saturation of the intestine or mesentery during or after a surgical procedure.
48 Citations
20 Claims
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1. A method comprising:
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providing a sensor probe comprising a first optical fiber, wherein the sensor probe is adapted to contact a serosal surface of a serosal tissue of an intestinal or mesentery tissue of a patient during a recovery from a temporary ischemic period, wherein the sensor probe is part of a needle sensor device comprising; a hollow needle; and the sensor probe, wherein distal ends of optical fibers are located at a tip of the sensor probe forming an oximeter sensor, and the sensor probe in a first mode, is disposed inside the hollow needle and, in a second mode, the sensor probe is extended past a distal end of the hollow needle to contact the serosal surface of the serosal tissue; transmitting radiation into the first optical fiber; emitting the radiation inside a body of the patient from the first optical fiber into the contacted serosal surface of the serosal tissue; collecting reflected radiation from the contacted serosal surface of the serosal tissue by using a second optical fiber of the sensor probe; by an electronic processor, using the collected reflected radiation from the second optical fiber to determine a rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period, after removing a constriction to a mesenteric artery; and using the electronic processor, diagnosing the patient as having intestinal ischemia according to the rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method comprising:
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providing a trocar including a pointed end and a hollow area, wherein the trocar is adapted to pierce a first tissue of an abdomen of a patient with the pointed end and the hollow area includes a hollow needle with a sensor probe, wherein the sensor probe comprises a first optical fiber and is adapted to contact a second tissue, different than the first tissue, including a serosal surface of a serosal tissue of an intestinal or mesentery tissue during a recovery from a temporary ischemic period and distal ends of optical fibers are located at a tip of the sensor probe forming an oximeter sensor, and the sensor probe in a first mode, is disposed inside the hollow needle and, in a second mode, is extended past a beveled edge of the hollow needle to slide the sensor probe to contact the serosal surface of the serosal tissue; transmitting radiation into the first optical fiber; emitting the radiation inside a body of the patient from the first optical fiber into the contacted serosal surface of the serosal tissue; collecting reflected radiation from the contacted serosal surface of the serosal tissue using a second optical fiber of the sensor probe; by an electronic processor, using the collected reflected radiation from the second optical fiber to determine a rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period, after removing a constriction to a mesenteric artery; and using the electronic processor, diagnosing the patient as having intestinal ischemia according to the rate of change of oxygen saturation of the serosal tissue of the intestinal or mesentery tissue during the recovery from the temporary ischemic period.
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Specification