Endoscopic Injection Needle Device

摘要

An endoscopic injection needle device includes a flexible elongate sheath attached to a handle. Disposed within the sheath is drive shaft having a lumen within and a needle at its distal end. The drive shaft is movable longitudinally within the sheath and is attached at its proximal end within the handle to an actuator. Advancing the actuator extends the needle from the distal end of the device. The actuator includes a locking mechanism that locks it in place with the handle when advanced a certain distance. The locking mechanism includes multiple locking positions wherein the exposed length of the needle corresponds to the distance advanced by the actuator at each locking position. Also included in the distal end of the sheath are a spring coil and a collar. The collar is positioned distal to the spring coil and includes a dome shaped distal end that extends beyond the distal end of the sheath. The drive shaft extends through the spring coil and, when retracted, the needle is housed within the collar. The spring coil and collar stabilize the distal end of the sheath, facilitating consistent deployment and retraction of the needle.

主权项

1. An injection needle device for use with an endoscope, said device comprising:
a handle having a cylindrical body, an exterior surface, a proximal end, and a distal end, said handle further comprising a first locking member on said exterior surface and a compressible spring within said cylindrical body; an actuator having a proximal end and a distal end, wherein said actuator is coupled at said proximal end to the distal end of said cylindrical body of said handle, said actuator further comprising a second locking member having a plurality of locking components, each of said locking components being separated by an interval; a spring coil; a drive shaft having a first lumen, a proximal end, and a distal end, wherein said proximal end of said drive shaft attaches to said distal end of said actuator and wherein said distal end of said shaft extends within said spring coil; and a needle attached to said distal end of said drive shaft, wherein said actuator is configured such that, upon advancement, said first locking member traverses said plurality of locking components of said second locking member and intervals therebetween, engaging one of the plurality of locking components of said second locking member to lock said actuator in place and said proximal end of said actuator telescopes into said body of said handle and compresses said compressible spring causing said needle to move from a first position to a second position, separated by a distance, wherein the distance is a predefined distance that is determinable based upon a number of said intervals traversed by the first locking member.