Surgery – Instruments – Light application
Patent
1997-11-24
1999-02-02
Manuel, George
Surgery
Instruments
Light application
A61B 1700
Patent
active
058658335
ABSTRACT:
The present invention relates to an apparatus for laser treatment for treating the tissue of a human body such as herniated lumbar intervertebral disc by irradiating it with laser light for vaporizing it. The apparatus comprises a hollow needle member which is percutaneously inserted into the target tissue; an optical fiber for transmitting therethrough a laser light from a laser light generator to emit the laser light from the front end thereof; a lead for detecting the temperature of said target tissue and the vicinity thereof; and means for introducing gas which is generated due to vaporization of said irradiated tissue to the outside of the body through the inside of said needle member; and generated gas detecting means for detecting the flow speed or flow rate of the gas which is generated due to the vaporization of said target tissue. The optical fiber and the temperature detecting lead are inserted into said needle member from the base end thereof. The front end of said optical fiber is positioned in said target position. The flow speed or flow rate of the gas is detected by said generated gas detecting means. The temperature of said target tissue and its vicinity is detected based upon a signal of the temperature from said temperature detecting lead. The manner of irradiation with the laser light is controlled based upon the flow speed or flow rate of the detected gas and said temperature.
REFERENCES:
patent: 5423807 (1995-06-01), Milder
patent: 5643197 (1997-07-01), Brucker et al.
Manuel George
S.L.T. Japan Co., Ltd.
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