Method and apparatus for determining blood parameters and vital signs of a patient
First Claim
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1. An apparatus for monitoring changes in blood parameters and vital signs of a patient, said apparatus comprising:
- a) means for illuminating a body part of a patient;
b) means for collecting optical signals over a period of time from said body part;
c) means for effecting pressure changes or temperature changes or both of the foregoing types of changes in said body part;
d) means for measuring pressure changes or temperature changes or both types of the foregoing changes experienced by said body part;
e) means for calculating at least one value of at least one blood parameter of said patient from the collected optical signals;
f) means for determining at least one value of at least one vital sign of the patient from said collected optical signals;
g) means for reporting said at least one value of said at least one blood parameter and said at least one value of said at least one vital sign; and
h) means for providing an alarm when (1) said at least one value of said at least one vital sign crosses a specified cut-off value or (2) the rate of change in said at least one value of said at least one vital sign crosses a specified cut-off value or (3) said at least one value of said at least one blood parameter crosses a specified cut-off value or (4) the rate of change in the at least one value of the at least one blood parameter crosses a specified cut-off value.
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Abstract
A method of monitoring a patient that comprises a non-invasive measurement of the hematocrit value or the concentration of hemoglobin coupled with the measurement of one or more vital signs. These vital signs include, but are not limited to, cardiac pulse rate, blood pressure, and arterial blood oxygenation. The invention also provides an apparatus for monitoring changes in the hematocrit value of a patient, in combination with one or more of the patient'"'"'s vital signs.
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Citations
19 Claims
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1. An apparatus for monitoring changes in blood parameters and vital signs of a patient, said apparatus comprising:
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a) means for illuminating a body part of a patient;
b) means for collecting optical signals over a period of time from said body part;
c) means for effecting pressure changes or temperature changes or both of the foregoing types of changes in said body part;
d) means for measuring pressure changes or temperature changes or both types of the foregoing changes experienced by said body part;
e) means for calculating at least one value of at least one blood parameter of said patient from the collected optical signals;
f) means for determining at least one value of at least one vital sign of the patient from said collected optical signals;
g) means for reporting said at least one value of said at least one blood parameter and said at least one value of said at least one vital sign; and
h) means for providing an alarm when (1) said at least one value of said at least one vital sign crosses a specified cut-off value or (2) the rate of change in said at least one value of said at least one vital sign crosses a specified cut-off value or (3) said at least one value of said at least one blood parameter crosses a specified cut-off value or (4) the rate of change in the at least one value of the at least one blood parameter crosses a specified cut-off value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for monitoring at least one blood parameter and at least one vital sign of a patient, said method comprising the steps of:
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a) collecting a set of optical measurements on a body part of a patient over a period of time;
b) determining at least one value of at least one blood parameter of said patient;
c) determining at least one value of at least one vital sign of said patient from said set of optical measurements;
d) reporting a combination of said at least one value of said at least one blood parameter and said at least one value of said at least one vital sign;
e) repeating steps a), b), c), and d) a sufficient number of times until a trend can be observed; and
f) activating an alarm when (1) said at least one value of said at least one vital sign crosses a specified cut-off value or (2) the rate of change in said at least one value of said at least one vital sign crosses a specified cut-off value or (3) said at least one value of said at least one blood parameter crosses a specified cut-off value or (4) the rate of change in said at least one value of said at least one blood parameter crosses a specified cut-off value. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification