Instrument for the penetration of body tissue
First Claim
1. An instrument for the direct penetration of body tissue comprising:
- a point having a proximal end and a distal end, said point having an axis between said proximal and distal ends, and enlarging in transverse extent from the distal end thereof towards the proximal end thereof, whereby said point is shaped to penetrate body tissue to create an opening therein and to enlarge the opening as the point is advanced with the said distal end forward of said proximal end,said distal end being substantially planar and substantially transverse to said axis, and at least said distal end being a transparent window to enable the transmission of light and the image of tissue, organ and the like,said point having an element with at least one set of surfaces converging to a linear edge extending from or adjoining the distal end of said point towards the proximal end thereof, said element having a distal end not beyond the distal end of said point,a rigid linear element at the proximal end of said point for advancing said point into and withdrawing said point from body tissue,whereby body tissue exteriorly of said point may be viewed prior to cutting and penetration thereof.
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Accused Products
Abstract
An instrument for penetrating body tissue has a rigid hollow shaft having at its distal end a penetrating point, which is at least partly transparent and which is conical, beveled or tapered; a hollow sleeve may surround the shaft. The instrument includes or can be associated with lighting and viewing elements. There may be provided a helical element at the penetrating point, having surfaces converging outwardly to a line. In another embodiment, the point comprises plural, flat, angularly related surfaces converging to a line, the point being at least partly transparent, as by being of opaque material having one or more openings closed by a transparent window. In a further embodiment, the point has a conical distal end and has along its side at least one and preferably two blade members which is/are at or rearwardly of the apex or distal end of the conical tip, and have surfaces converging to a linear edge coaxial with the axis of the point.
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Citations
31 Claims
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1. An instrument for the direct penetration of body tissue comprising:
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a point having a proximal end and a distal end, said point having an axis between said proximal and distal ends, and enlarging in transverse extent from the distal end thereof towards the proximal end thereof, whereby said point is shaped to penetrate body tissue to create an opening therein and to enlarge the opening as the point is advanced with the said distal end forward of said proximal end, said distal end being substantially planar and substantially transverse to said axis, and at least said distal end being a transparent window to enable the transmission of light and the image of tissue, organ and the like, said point having an element with at least one set of surfaces converging to a linear edge extending from or adjoining the distal end of said point towards the proximal end thereof, said element having a distal end not beyond the distal end of said point, a rigid linear element at the proximal end of said point for advancing said point into and withdrawing said point from body tissue, whereby body tissue exteriorly of said point may be viewed prior to cutting and penetration thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An optical penetrator for body tissue comprising:
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a rigid elongated shaft, a penetrating point on said shaft having a distal end remote from said shaft and a tapered distal end portion adjacent said distal end increasing in transverse dimension therefrom, said distal end of said penetrating point being a transverse planar distal end, at least said distal end of said penetrating point being transparent, said penetrating point having at least one set of surfaces converging to a linear edge having one part thereof closer to said distal end of said penetrating point than another part thereof and not extending substantially beyond said distal end of said penetrating point. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. For use with a hollow rigid shaft adapted to receive light transmitting and image transmitting systems,
a penetrating point of generally conical truncated configuration, said penetrating point having a planar truncated distal end, said planar distal end being transparent, and a blade member comprising a set of surfaces converging to a linear edge fixedly secured to and extending outwardly of and along said penetrating point, the linear edge having an end adjacent and not beyond said truncated planar distal end.
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31. A surgical penetration device comprising:
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a) an elongated, tubular or sleeve-like member having a space therein and having a first end; b) an imaging member, capable of transmitting images received back from the surgical site in advance of and laterally of said device, positioned at or cooperable with said first end, said imaging member comprising a penetrating point having a planar transverse and transparent distal end; c) a cutting element positioned on or cooperable with said imaging member to enable said imaging member to pierce and cut tissue, said cutting element not extending beyond said imaging member; d) said space in said elongated member being capable of containing a lighting means and a light image receiving means to cooperate with said imaging member.
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Specification