Endoscopic ultrasound fine needle aspiration device

1. A handle for a medical device, comprising:

a proximal segment defining a proximal lumen extending longitudinally therethrough, the proximal lumen being sized and shaped to receive an endoscopic medical device therein;

a medial segment received within a distal portion of the proximal segment, the medial segment having an outer diameter smaller than an inner diameter of the proximal segment and defining a medial lumen extending therethrough open to the proximal lumen; and

a distal segment received within a distal portion of the medial segment and defining a distal lumen extending therethrough open to the medial lumen, the distal segment having an outer diameter smaller than an inner diameter of the medial segment, wherein the medial segment includes a first movement limiting mechanism configured to limit advancement and retraction of an endoscope attached to a distal end of the distal segment and wherein the medial segment includes a second movement limiting mechanism limiting movement of the endoscopic medical device inserted through the proximal, medial and distal lumens along an axis of the distal lumen,

wherein the distal segment includes an attachment sized and shaped to engage a corresponding attachment at a proximal end of the endoscope to which the handle is to be mounted, and

wherein the proximal segment is rotatably coupled to the distal segment and is adapted to non-rotatably couple to a needle to be mounted therein so that rotation of the proximal segment rotates the needle inserted therein within the distal segment and a working channel of the endoscope coupled thereto.

2. The handle of claim 1 , wherein the second movement limiting mechanism is slidably positioned over a target portion of the medial segment so that only a portion of the medial segment located proximally thereof is retractable into the proximal segment.

3. The handle of claim 1 , wherein the first movement limiting mechanism locks a position of the distal segment relative to the medial segment.

4. The handle of claim 1 , wherein the endoscopic medical device is a needle.

5. The handle of claim 4 , wherein the needle is configured to reflect ultrasound signals.

6. The handle of claim 1 , wherein the distal segment threadedly engages the endoscope.

7. The handle of claim 6 , wherein the distal segment engages the endoscope via a luer lock.

8. The handle of claim 1 , wherein the distal lumen extends through an extension member mounted within the distal segment, the extension member being sized and shaped for insertion into the working channel of the endoscope to guide the endoscopic medical device inserted therethrough into the working channel.

9. The handle of claim 8 , wherein the endoscopic medical device is a needle.

10. The handle of claim 9 , wherein the needle is an endoscopic ultrasound needle.

11. The handle of claim 1 , wherein a portion of the proximal lumen is keyed to a shape of the needle to be inserted therethrough to non-rotatably couple the needle to the proximal segment.

12. The handle of claim 1 , wherein, in a first configuration, the first movement limiting mechanism permits the distal segment to move longitudinally through the medial segment to adjust a length of the handle to a desired length and, in a second configuration, locks the medial and distal segments relative to one another to maintain the desired length of the handle.