Cannula driver and system
First Claim
Patent Images
1. A cannula and cannula driving system, comprising:
- a cannula comprising;
an elongated tubular body having an axis, a proximal end and a distal end;
a proximally facing surface at the proximal end of said cannula, said surface situated transversely to said axis; and
a cannula driver comprising;
an elongated obturator shaft having an axis, a proximal end and a distal end, said obturator shaft being received within said tubular body of said cannula; and
a handle having an axis, a proximal end, and a distal end, said distal end of said handle being secured to the proximal end of said elongated obturator shaft, said handle having a distally facing surface at its distal end,one of said cannula and said driver defining a noncircularly profiled, coaxially aligned recess and the other of said cannula and said driver comprising a correspondingly noncircularly profiled, coaxially aligned projection having a cross-sectional shape corresponding to the shape of said recess, so that said projection can be received in said recess,whereby torque applied by a user to said handle of said cannula driver is transmitted by the interfitting projection and recess to said proximal end of said cannula, so as to rotate said cannula.
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Abstract
A cannula and cannula driver system comprises a tubular cannula and a driver, the driver comprising an elongated obturator shaft and a handle. A noncircular recess is formed on one of the of the cannula and the obturator shaft which receives a correspondingly-shaped projection formed about the other of the cannula and obturator shaft, so that when the obturator shaft is inserted into the tubular cannula, the projection fits into the recess, whereby torque applied to the handle of the driver is transferred to the cannula.
26 Citations
7 Claims
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1. A cannula and cannula driving system, comprising:
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a cannula comprising; an elongated tubular body having an axis, a proximal end and a distal end; a proximally facing surface at the proximal end of said cannula, said surface situated transversely to said axis; and a cannula driver comprising; an elongated obturator shaft having an axis, a proximal end and a distal end, said obturator shaft being received within said tubular body of said cannula; and a handle having an axis, a proximal end, and a distal end, said distal end of said handle being secured to the proximal end of said elongated obturator shaft, said handle having a distally facing surface at its distal end, one of said cannula and said driver defining a noncircularly profiled, coaxially aligned recess and the other of said cannula and said driver comprising a correspondingly noncircularly profiled, coaxially aligned projection having a cross-sectional shape corresponding to the shape of said recess, so that said projection can be received in said recess, whereby torque applied by a user to said handle of said cannula driver is transmitted by the interfitting projection and recess to said proximal end of said cannula, so as to rotate said cannula. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification