Multiparametric apparatus for monitoring multiple tissue vitality parameters
First Claim
1. (original) apparatus for selectively monitoring a blood flow rate tissue viability parameter and at least one second tissue viability parameter corresponding to a substantially identical tissue element, the apparatus comprising:
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illumination means for illuminating at least said tissue element with an illuminating radiation via at least one illumination location with respect to said tissue element;
radiation receiving means for receiving a radiation from said tissue element as a result of an interaction between said illuminating radiation and said tissue element, wherein a part of said received radiation is correlated to said blood flow rate tissue viability parameter, and wherein another part of said received radiation is correlated to said at least one second tissue viability parameter, said radiation receiving means being displaced from said illumination location by a displacement;
characterised in that said illuminating radiation is a laser radiation having a nominal wavelength in the range from about 370 nm to about 470 nm.
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Abstract
Apparatus for monitoring a plurality of tissue viability parameters of a substantially identical tissue element, in which a single illumination laser source provides illumination radiation at a wavelength such as to enable monitoring of blood flow rate and NADH or flavoprotein concentration, together with blood volume and also blood oxygenation state. In preferred embodiments, an external cavity laser diode system is used to ensure that the laser operates in single mode or at else in two or three non-competing modes, each mode comprising a relatively narrow bandwidth. A laser stabilisation control system is provided to ensure long term operation of the laser source at the desired conditions.
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Citations
81 Claims
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1. (original) apparatus for selectively monitoring a blood flow rate tissue viability parameter and at least one second tissue viability parameter corresponding to a substantially identical tissue element, the apparatus comprising:
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illumination means for illuminating at least said tissue element with an illuminating radiation via at least one illumination location with respect to said tissue element;
radiation receiving means for receiving a radiation from said tissue element as a result of an interaction between said illuminating radiation and said tissue element, wherein a part of said received radiation is correlated to said blood flow rate tissue viability parameter, and wherein another part of said received radiation is correlated to said at least one second tissue viability parameter, said radiation receiving means being displaced from said illumination location by a displacement;
characterised in that said illuminating radiation is a laser radiation having a nominal wavelength in the range from about 370 nm to about 470 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81)
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Specification