Lithotomic apparatus
First Claim
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1. A lithotomic apparatus for treating a calculus produced in a body cavity, comprising:
- an elongated suction probe, that can be inserted into the body cavity, including a distal end, a proximal end, an inner tube defining an instrument channel having a distal end open to the distal end of the probe, an outer tube located around the inner tube with a gap therebetween, a suction channel defined between the inner and outer tubes and having an annular cross section, and a plurality of suction holes formed in the circumference of the outer tube to communicate with the suction channel and located near the distal end of the probe;
suction means for sucking gas from the suction holes through the suction channel;
an elongated viewing probe, that can be inserted into the instrument channel, for viewing a region near the distal end of the suction probe;
an elongated treating probe, having a nozzle portion at a distal end thereof, that can be inserted into the instrument channel so that the nozzle portion projects from the distal end of the suction probe;
means for supplying a high-pressure fluid; and
a drive mechanism for feeding the high-pressure fluid to the treating probe and pulsatively ejecting the fluid from the nozzle portion, the drive mechanism including a control circuit for controlling the ejection of the fluid and the suction of the gas so that the pressure in a body cavity can be kept at a predetermined value.
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Abstract
A lithotomic apparatus includes a probe for insertion into the body cavity. A distal tip is fixed to the distal end of the probe and has nozzles. Each nozzle has a rear end communicating with a feed passage defined in the probe and a front end opening to the distal end face of the distal tip. A high-pressure fluid supplied from a source is fed to the feed passage of the probe and pulsatively ejected from the nozzles toward a calculus in the body cavity by a drive mechanism.
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Citations
7 Claims
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1. A lithotomic apparatus for treating a calculus produced in a body cavity, comprising:
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an elongated suction probe, that can be inserted into the body cavity, including a distal end, a proximal end, an inner tube defining an instrument channel having a distal end open to the distal end of the probe, an outer tube located around the inner tube with a gap therebetween, a suction channel defined between the inner and outer tubes and having an annular cross section, and a plurality of suction holes formed in the circumference of the outer tube to communicate with the suction channel and located near the distal end of the probe; suction means for sucking gas from the suction holes through the suction channel; an elongated viewing probe, that can be inserted into the instrument channel, for viewing a region near the distal end of the suction probe; an elongated treating probe, having a nozzle portion at a distal end thereof, that can be inserted into the instrument channel so that the nozzle portion projects from the distal end of the suction probe; means for supplying a high-pressure fluid; and a drive mechanism for feeding the high-pressure fluid to the treating probe and pulsatively ejecting the fluid from the nozzle portion, the drive mechanism including a control circuit for controlling the ejection of the fluid and the suction of the gas so that the pressure in a body cavity can be kept at a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A lithotomic apparatus for treating a calculus produced in a body cavity, comprising:
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an elongated suction probe, that can be inserted into the body cavity, including a distal channel having a distal end open to the distal end of the probe, an outer tube located around the inner tube with a gap therebetween, a suction channel defined between the inner and outer tubes and having an annular cross section, and a plurality of suction holes formed in the circumferences of the outer tube to communicate with the suction channel and located near the distal end of the probe; suction means for sucking gas from the suction holes through the suction channel; an elongated viewing probe, that can be inserted into the instrument channel, for viewing a region near the distal end of the suction probe; an elongated treating probe, having a nozzle portion at a distal end thereof, that can be inserted into the instrument channel so that the nozzle portion projects from the distal end of the suction probe; means for supplying a high-pressure fluid, and a drive means for feeding the high-pressure fluid to the treating probe and pulsatively ejecting the fluid from the nozzle portion.
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Specification