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US 2012/0259203 A1Published application
Sheath Retractable Flexible Injection Needle
OwnerPaul David Devereux, Shay Joseph Lavelle +2inventors
InventorsPaul David Devereux, Shay Joseph Lavelle, Therese Elizabeth Fitzgibbon, Ciarán Toomey
Life of this patent
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Abstract
Devices that provide an accurate needle injection depth by way of a sheath covered flexible injection needle that prevents accidental piercing, permits easy unsheathing and re-sheathing of the needle, and permits tactile feedback and direct or indirect visualization to confirm proper needle injection depth are illustrated.
Claims20
A medical device for use with an endoscope comprising:
- a needle comprising a proximal portion and a distal portion, the distal portion of the needle comprising a sharpened tip;
- a sheath comprising a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion of the sheath, wherein at least a portion of the needle is movably disposed through the lumen;
- and
- a handle comprising:
- an outer handle component fixedly connected to the proximal portion of the needle;
- an inner handle component fixedly connected to the proximal portion of the sheath, the inner handle component being slidably engaged with the outer handle component, wherein the inner handle component comprises a locking pin disposed thereonto;
- and
- a plurality of channels disposed in the outer handle component and configured for providing a pathway for axial and transverse movement of the locking pin, the plurality of channels comprising a longitudinal channel along which the locking pin moves as the sheath is moved relative to the needle to expose or conceal a distal portion of the needle, and a first transverse channel in communication with and disposed at an angle acute to the longitudinal channel;
- wherein the medical device is configured to be advanced through a working channel of an endoscope;
- wherein the needle and the sheath each are sufficiently flexible such that angulation of the endoscope is not unduly diminished or hindered when disposed through the working channel of the endoscope.
7 more elements
A medical device comprising:
- a needle comprising a proximal portion and a distal portion, the distal portion of the needle comprising a sharpened tip;
- a sheath comprising a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion of the sheath, wherein at least a portion of the needle is movably disposed through the lumen;
- and
- a handle comprising:
- an outer handle component fixedly connected to the proximal portion of the needle;
- an inner handle component fixedly connected to the proximal portion of the sheath, the inner handle component being slidably engaged with the outer handle component, wherein the inner handle component and the outer handle component comprise complimentary means for guiding or locking a position of the sheath relative to the needle;
- and
- an adjustment mechanism attached to the outer handle component, wherein the adjustment mechanism comprises a screw to rotatably lengthen and shorten the medical device relative to an endoscope;
- wherein the medical device is configured to be advanced through a working channel of the endoscope;
- wherein the needle and the sheath each are sufficiently flexible such that angulation of the endoscope is not unduly diminished or hindered when disposed through the working channel of the endoscope.
7 more elements
A method of using a sheath retractable flexible injection needle comprising:
- providing a sheath retractable flexible injection needle comprising:
- a needle;
- a sheath;
- and
- a handle comprising:
- an outer handle component fixedly connected to the proximal portion of the needle;
- an inner handle component fixedly connected to the proximal portion of the sheath, the inner handle component being slidably engaged with the outer handle component, wherein the inner handle component comprises a locking pin disposed thereonto;
- and
- a plurality of channels disposed in the outer handle component and configured for providing a pathway for axial and transverse movement of the locking pin, the plurality of channels comprising a longitudinal channel along which the locking pin moves as the sheath is moved relative to the needle to expose or conceal a distal portion of the needle, and a first transverse channel in communication with and disposed at an angle acute to the longitudinal channel;
- wherein the sheath retractable flexible injection needle is configured to be advanced through a working channel of an endoscope;
- wherein the needle and the sheath each are sufficiently flexible such that angulation of the endoscope is not unduly diminished or hindered when disposed through the working channel of the endoscope;
- attaching a syringe to a portion of the handle adapted for receiving a syringe;
- positioning the needle over an injection site;
- retracting the sheath thereby exposing a portion of the needle;
- locking the sheath;
- pushing the needle into the injection site;
- and
- injecting a substance into the injection site.
15 more elements
Dependencies are inferred from the claim text.