Optical catheter calibrating assembly
First Claim
1. A calibrating device for use with an optical oximetry catheter comprising a tubular enclosure having a passage therein for reception of the distal end of the catheter, a solid reference element for receiving a light beam from a transmitting light guide in said catheter and for scattering and reflecting light back to a receiving light guide in said catheter in a manner similar to that of blood, said reference element being received within the passage in said enclosure and having a compliant surface characteristic, means for urging said reference element into compliant engagement with the distal end of said catheter, and a resilient strap stretched across the entrance of said passage and removably fastened to the enclosure so as to provide a gripping force on said catheter to prevent movement thereof with respect to the enclosure.
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0 Petitions
Accused Products
Abstract
A calibrating device for an optical catheter is provided in order to calibrate the catheter for use in a catheter oximeter system. The calibrating device includes a tube having a reference block therein which is spring-loaded into compliant engagement with the distal end of the catheter carrying the fiberoptic light transmitting and receiving guides. A releasable strap tightly secures the catheter to the calibrating device. The packaged catheter is therefore ready for calibration by simply removing the proximal end thereof from a sealed package while the calibrating device and major length of the catheter remain in their sealed and sterilized condition and connecting it to a processor for performing the calibration operation.
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Citations
15 Claims
- 1. A calibrating device for use with an optical oximetry catheter comprising a tubular enclosure having a passage therein for reception of the distal end of the catheter, a solid reference element for receiving a light beam from a transmitting light guide in said catheter and for scattering and reflecting light back to a receiving light guide in said catheter in a manner similar to that of blood, said reference element being received within the passage in said enclosure and having a compliant surface characteristic, means for urging said reference element into compliant engagement with the distal end of said catheter, and a resilient strap stretched across the entrance of said passage and removably fastened to the enclosure so as to provide a gripping force on said catheter to prevent movement thereof with respect to the enclosure.
- 6. An optical catheter assembly ready for use in a catheter oximetry system, said assembly comprising an optical catheter having at least a pair of light guides therein extending to the distal end thereof with one of said guides adapted to transmit light to the distal end of the catheter and with the other of said guides adapted to receive light reflected back from the material at said distal end, and a calibrating device attached to said distal end of the catheter for providing an initial calibration reading for the catheter, said calibrating device comprising a tubular enclosure having a passage therein for reception of the distal end of the catheter, a solid reference element for receiving a light beam from the transmitting light guide in said catheter and for scattering and reflecting light back to the receiving light guide in said catheter in a manner similar to that of blood, said reference element being received within the passage in said enclosure and having a compliant surface characteristic, means for urging said reference element into compliant engagement with the distal end of said catheter, and a resilient strap stretched across the entrance of said passage and removably fastened to the enclosure so as to provide a gripping force on said catheter to prevent movement thereof with respect to the enclosure and reference element therein.
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13. An optical catheter assembly package providing a sealed and sterilized catheter ready for use in a catheter oximetry system, said package comprising a tray;
- an optical catheter having at least a pair of light guides therein extending from an optical connector at one end thereof throughout the length of the catheter to the distal end thereof with one of said guides adapted to transmit light to the distal end of the catheter and with the other of said guides adapted to receive light reflected back from the material at said distal end, said catheter being received in said tray;
a calibrating device attached to said distal end of the catheter for providing an initial calibration reading for the catheter, said calibrating device comprising a tubular enclosure having a passage therein for reception of the distal end of the catheter, a solid reference element for receiving a light beam from the transmitting light guide in said catheter and for scattering and reflecting light back to the receiving light guide in said catheter in a manner similar to that of blood, said reference element being received within the passage in said enclosure and having a compliant surface characteristic, means for urging said reference element into compliant engagement with the distal end of said catheter, and means removably fastened to the enclosure for providing a gripping force on said catheter to prevent movement thereof with respect to the enclosure and reference element therein; and
a flexible sealing material covering and enclosing the catheter and calibrating device in the tray in a sealed and sterile condition, a portion of said sealing material being removable while the remainder of the sealing material remains in its sealed and enclosing condition to expose the optical connector of the catheter thereby permitting it to be connected to an oximetry system to provide a calibration reading for the catheter based on the reflected light received from the reference element. - View Dependent Claims (14, 15)
- an optical catheter having at least a pair of light guides therein extending from an optical connector at one end thereof throughout the length of the catheter to the distal end thereof with one of said guides adapted to transmit light to the distal end of the catheter and with the other of said guides adapted to receive light reflected back from the material at said distal end, said catheter being received in said tray;
Specification