Lithotriptor
AssigneesAgency of Industrial Science and Technology, Kyoto Prefectural Government, Hosoya Fireworks Co., Ltd.
InventorsSenzo Oinuma, Kazumi Tanaka, Kazuo Shiino, Hiroki Watanabe
Life of this patent
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Abstract
A lithotriptor is disclosed, which comprises an outer slender tube having an outside diameter small enough to be inserted into the organ growing a stone therein and an inner member disposed inside the outer slender tube. The inner member or the outer slender member incorporates therein an explosive layer or a gas-generating layer, ignition means for igniting the explosive layer or the gas-generating layer, and a closing member for preventing rearward advance of the gas evolved during the explosion of the explosive layer or the gas-generating layer. By the blasting of the explosive layer or the gas-generating layer, the outer slender tube or the inner member is caused to collide with the stone and crush it.
Claims14
A lithotriptor comprising an outer slender tube small in outside diamter enough for insertion into an organ growing a stone therein and open in the leading end thereof, an inner member internally disposed in the front portion of said outer slender tube, means for preventing gases from leaving said outer slender tube, said outer slender tube accommodating therein behind said inner member an explosive layer or a gas-generating layer, ignition means for igniting said explosive layer or said gas-generating layer, and a closing member for preventing rearward advance of the gas generated on explosion of said explosive layer or said gas-generated layer, and said closing member admitting insertion of a power feed line for passing electric current to said ignition means and thereby causing explosion of said explosive layer of gas-generating layer.
A lithotriptor, comprising an outer slender tube small in outside diamter enough to be inserted into an organ growing a stone therein and an inner member internally disposed within said outer slender tube, said outer slender tube admitting therein a flexible tube slidably inserted therein through the rear end of said outer slender tube and communicating with said inner member, said outer slender tube and said inner member consequently being displaceable in the axial direction relative to each other, said inner member accommodating therein an explosive layer, ignition means for igniting said explosive layer, and a closing member for preventing rearward advance of the gas evolved on explosion of said explosive layer, said closing member and said flexible tube admitting insertion of a power feed line for passing electric current to said ignition means thereby causing explosion of said explosive layer, and said inner member being provided at the leading end thereof with a thin film adapted to break itself on exposure to the explosion of said explosive layer and form an opening in said inner member.
Dependencies are inferred from the claim text.