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7039454 |
Biological optical measuring instrument
A biological optical measuring instrument comprising a measuring probe ( 101 ) for collecting light from a plurality of portions of a subject ( 214 ) transmitted through the subject ( 214 ) by...
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6997880 |
Waveform interpreter for respiratory analysis
A capnograph which performs an analysis of the breath waveforms measured by the carbon dioxide sensor, interprets the results of this analysis, and outputs to the operator diagnostic information...
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6901281 |
Method of magnetic resonance imaging
The invention provides a method of magnetic resonance imaging of regional blood oxygenation which comprises administering into the vasculature of a vascularized human or non-human animal subject a...
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6334064 |
Remote sensing tonometric catheter apparatus and method
A tonometric device for use in hollow viscus tonometry and remote sensing of patient fluid parameters is disclosed in combination with a secondary apparatus, such as a urinary catheter, a...
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6248080 |
Intracranial monitoring and therapy delivery control device, system and method
An implantable medical device having an hermetically sealed enclosure housing electrical and electronic circuitry and a battery for powering such circuitry is connected to an intracranial lead or...
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5676140 |
Non-invasive blood pressure measurement device
A non-invasive blood pressure measurment device including: a cuff, a pressure detector for detecting a cuff pressure; a cuff pressure control pump for linearly increasing or decreasing the cuff...
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5515864 |
Method and apparatus for the in vivo measurement of oxygen concentration levels by the indirect determination of fluoescence lifetime
Methods are described for the in vivo topographic determination of tissue and bodily fluid oxygen concentration or PO 2 within an imaged tissue, as well as a method for measuring blood or bodily...
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5422478 |
Fiberoptic pressure sensor having drift correction means for insitu calibration
An improved intensity-encoded fiber optic sensor incorporating novel drift correction and filtering means is disclosed. The first embodiments of the invention relate to means for removing unwanted...
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5353792 |
Sensing device
In order to simultaneously determine the concentrations of different analytes in several places in a tissue by means of a thin, biocompatible tube or cannula which is inserted into the tissue, the...
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5284139 |
Hemometrix temperature compensation
A method for converting a value for the partial pressure of oxygen (pO 2 ) in blood at a measurement temperature to a corresponding value at a reference temperature (37° C.). A value for pO 2 is...
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5279793 |
Optical osmometer for chemical detection
A fiber optic optical osmometer (50) includes a fiber optic probe (20) inserted into a chamber (24) including a filter member (10 ) and a diaphragm (14) responsive to a pressure change in the...
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5251633 |
Optical probe
An improved optical probe for the invasive measurement of partial carbon dioxide pressures is disclosed that minimizes pCO 2 reading drift. An optical probe for the invasive measurement of the...
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5234835 |
Precalibrated fiber optic sensing method
A precalibrated sensing system for determining a blood parameter such as the partial pressures of oxygen (pO 2 ) and carbon dioxide (pCO 2 ), and the negative logarithm of hydrogen ion activity...
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5190039 |
Apparatus and method for monitoring body organs
An apparatus and a method for non-invasively measuring oxygen partial pressure in a living body in which light is thrown on a living body to be measured, the oxygen saturation of the living body is...
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5125058 |
Fiber optic connection and method of measuring intravascular pressure using same
The present invention relates to a fiber optic connection (1) between a sensor-guide portion (2) comprising an optic fiber (4) arranged in an air channel, said optic fiber (4) leading to a sensor...
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5058416 |
Apparatus for the determination of the partial pressure of gases dissolved in a fluid
An apparatus for determining the partial pressure of a gas dissolved in a fluid which includes a catheter consisting of a double bored coaxial catheter having an outer tube and a spaced coaxial...
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5048525 |
Blood parameter measurement system with compliant element
An assembly for the measurement of a blood parameter comprising a catheter having a lumen extending therethrough and a sensor mounted in the lumen. A conduit couples the lumen to a source of...
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5039492 |
Optical pH and gas concentration sensor
An optical pH sensor and a gas sensor utilizing the pH sensor. The pH sensor includes an indicator whose absorbance is a function of the concentration of hydronium ions in a media surrounding the...
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5039491 |
Optical oxygen sensor
An oxygen sensor contains an indicator whose change in absorption is a function of the concentration of oxygen in a sample bathing the indicator. Light transmitted and reflected through the...
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5020537 |
Measuring probe
A measuring probe for the invasive measurement of blood parameters such as pH, pO 2 or pCO 2 comprises one or more optical fibers in a tubing. These optical fibers end up in sensors which are...
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5005576 |
Optical probe
Optical probes for the invasive measurement of blood parameters consist of at last one sensor, each of these sensors having a diffusion zone with a selective membrane. The sensor or the sensors are...
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4934369 |
Intravascular blood parameter measurement system
A parameter of blood is sensed in vivo with a system which includes a catheter and a probe. The catheter has a lumen extending therethrough, a proximal end, a distal end and a distal opening at the...
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4844871 |
Method of determining the partial pressure of gases in blood and an apparatus for performing the method
A method and an apparatus are described for determining the partial pressures of gases in blood, in which a membrane filter is used to separate plasma which passes to a blood gas analyzer.
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4813423 |
Instrument for measuring living body components
Disclosed is an instrument for measuring living body components, which has (i) a fine tube having at one end thereof a connection portion to be connected to an indwelling needle or indwelling...
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4800886 |
Sensor for measuring the concentration of a gaseous component in a fluid by absorption
Apparatus and methods are provided for determining the concentration of a gaseous component in a fluid. A solid body of a natural or synthetic high polymer, which is permeable to the gaseous...
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4201222 |
Method and apparatus for in vivo measurement of blood gas partial pressures, blood pressure and blood pulse
An optical catheter including an absorption chamber and distensible semipermeable diaphragm are disclosed for the simultaneous measurement of blood gases, blood pressure and pulse rate.
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