Subcutaneous radiation reflection probe
First Claim
1. A subcutaneous reflection probe for measuring E/M radiation from illuminated tissue comprisinga hollow needle having a pointed free end for insertion in the tissue and a base end, with a window formed in a wall of the needle,a radiation emitter means disposed in the hollow of the needle for selectively emitting radiation through the window to illuminate the tissue,a base element on which the base end of the needle is secured,a base element mounting cup comprising a body having a receiving hollow formed at a top thereof for receiving and holding the base element so that the needle extends upwardly and out of the hollow, and having a slot formed on an underside thereof for receiving an end of a drive shaft so that the mounting cup is caused to rotate as the drive shaft is rotated, anda radiation detector means disposed on the base element so as to face the tissue when the free end of the needle is inserted therein, for measuring the radiation from the illuminated tissue.
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Accused Products
Abstract
A subcutaneous radiation reflection probe for measuring oxygen saturation in living tissue includes an elongate drive shaft on one end of which is detachably coupled a mounting cup. The mounting cup includes a hollow for receiving and holding a base element on which is mounted a spiral needle which coils outwardly from the mounting cup to terminate in a pointed end. A window is formed in the spiral needle near the pointed end thereof for receiving and holding a radiation emitter, such as a light emitting diode. A radiation detector is disposed on the base element within the coil of the spiral needle. The probe may be used to measure oxygen saturation in living tissue, such as a fetal scalp, by inserting the mounting cup and drive shaft through an introducer into a woman'"'"'s vagina until the spiral needle contacts the fetal scalp. The drive shaft may then be rotated so that the spiral needle rotates into the scalp, after which energizing pulses are applied to the radiation emitter to cause it to emit radiation and illuminate the fetal scalp tissue into which the needle is inserted. The radiation detector detects a portion of this radiation, depending upon the oxygen saturation of the tissue, and develops a signal to thus provide a measure of the oxygen saturation.
44 Citations
33 Claims
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1. A subcutaneous reflection probe for measuring E/M radiation from illuminated tissue comprising
a hollow needle having a pointed free end for insertion in the tissue and a base end, with a window formed in a wall of the needle, a radiation emitter means disposed in the hollow of the needle for selectively emitting radiation through the window to illuminate the tissue, a base element on which the base end of the needle is secured, a base element mounting cup comprising a body having a receiving hollow formed at a top thereof for receiving and holding the base element so that the needle extends upwardly and out of the hollow, and having a slot formed on an underside thereof for receiving an end of a drive shaft so that the mounting cup is caused to rotate as the drive shaft is rotated, and a radiation detector means disposed on the base element so as to face the tissue when the free end of the needle is inserted therein, for measuring the radiation from the illuminated tissue.
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23. A subcutaneous reflection probe for measuring E/M radiation from illuminated tissue comprising
a hollow needle having a pointed free end for insertion in the tissue and a base end, with a window formed in a wall of the needle, a radiation emitter means disposed in the hollow of the needle for selectively emitting radiation through the window to illuminate the tissue, a base element on which the base end of the needle is secured, a radiation detector means disposed on the base element so as to face the tissue when the free end of the needle is inserted therein, for measuring the radiation from the illuminated tissue, an elongate multiple-conductor flexible circuit, one end of which is coupled to the radiation emitter means for delivering electrical signals thereto, and to the radiation detector means for carrying signals therefrom, and clip means for coupling electrically to the other end of the flexible circuit and to a plurality of conductors thereof.
Specification