JPWO2020163237A5 - - Google Patents

Claims (27)

a needle housing;
a needle shaft having a portion located inside the needle housing;
a lumen within the needle shaft;
an entry port at the proximal end of the needle shaft;
a needle tip at the distal end of the needle shaft;
an exit port in a side wall of the needle shaft, the exit port being located closer to the distal end than the proximal end of the needle shaft, and the lumen extending from the entry port to the exit port said exit port;
an access needle. The access needle of Claim 1, wherein the needle shaft has a gauge of about 25 or greater. 3. The access needle of any one of claims 1 and 2, further comprising a guide surface configured to guide a wire from the lumen to the exit port. 4. The access needle of any one of claims 1-3, further comprising a wire in the lumen. 5. Any of claims 1-4, further comprising a second wire in the lumen and a second entry port receiving the second wire at the proximal end of the needle shaft. An access needle as described in paragraph 1. 6. The access needle of any one of claims 1-5, further comprising a locking mechanism. 7. The access needle of any one of claims 1-6, further comprising a lock for attaching the needle shaft to an endoscope channel of an endoscope. 8. The access needle of claim 7, wherein the needle shaft is adjustable to allow movement of the needle shaft relative to the tip of the endoscope inside the needle housing. 10. At least one of the needle housing, the needle shaft, or the distal end of the needle shaft is rotatable to change the direction of wire exit from the exit port by rotation of the exit port. An access needle according to any one of claims 1-8. 10. The access needle of any one of claims 1-9, further comprising a sheath disposed about the needle shaft. The access needle of Claim 10 , further comprising a locking mechanism configured to secure the needle shaft in position relative to the sheath. At least one of the needle housing, the sheath, the needle shaft, or the distal end of the needle shaft is rotatable to change the direction of wire exit from the exit port by rotation of the exit port. 10. The access needle of claim 11. 13. The access needle of any one of claims 10-12 , wherein the needle shaft is slidably disposed inside the sheath. 14. A sheath according to any one of claims 10 to 13, wherein the sheath has a proximal end and a distal end, the distal end tapering towards the needle tip of the needle shaft. access needle. 15. The access needle of any one of claims 1-14, further comprising a removable cover for the entry port. 16. The access needle of any one of claims 1-15, wherein the entry port is configured to receive the wire for passage of the wire through the lumen and the exit port. 17. The access needle of any one of claims 1-16, wherein the entry port further includes an attachment mechanism for attaching a syringe that provides fluid within the lumen and to the exit port. 18. The access needle of any one of claims 1-17, wherein the lumen forms a guide surface to bend a wire inside the needle shaft to the exit port. Further comprising one or more markers positioned proximate at least one of said needle tip or said exit port, said one or more markers detectable using an ultrasonic radiation detector or an electromagnetic radiation detector. 19. The access needle of any one of claims 1-18. Further comprising one or more markers positioned proximate at least one of the needle housing, the needle shaft, or the needle handle, the one or more markers configured to scatter ultrasonic or electromagnetic radiation. 20. The access needle of any one of claims 1-19, wherein the access needle comprises: after using the needle tip to puncture an organ containing a target site , a contrast agent can be injected into the organ through the lumen in the needle shaft; and
After adjusting the placement of the access needle within the contrast-infused organ, a wire can be inserted through the entry port, the lumen, and the exit port to access the target site. is
21. The access needle of any one of claims 1-20 . after the wire has accessed the target site, the needle housing and the needle shaft can be removed;
the wire is for guiding a medical device to the target site after the needle housing and the needle shaft are removed ;
22. The access needle of Claim 21 . 23. The access needle of Claim 22, wherein the target site is an occluded duct and the medical device comprises a stent . A current can be directed from the needle tip into the access site within the organ to dilate the access site and/or cauterize bleeding within the organ containing the target site. 24. The access needle of any one of claims 1-23, configured . The needle housing is configured to be rotatable about the longitudinal axis of the needle shaft so as to adjust the placement of the access needle within the organ containing the target site. 25. The access needle of any one of claims 1-24 , wherein the access needle comprises: 26. An access needle according to any one of claims 1 to 25 for directing a guide element to a target site contained in an organ , and an access needle for directing the access needle in the vicinity of the organ. an imaging device for piercing an access site in the organ using a tip , the system comprising:
The imaging device
a radiation source configured to direct radiation to said organ;
a radiation detector configured to detect radiation scattered from said organ;
a controller configured to receive signals from the radiation detector and convert the signals into an image; and
a display configured to display the image from the controller to direct the access needle near the organ.
system . The access needle further includes one or more indicia positioned proximate at least one of the needle tip, the exit port, the needle housing, the needle shaft, or the needle handle; the label is configured to scatter ultrasonic or electromagnetic radiation generated by said radiation source;
The radiation detector adjusts placement of the access needle within the organ based on including a representation of the access needle within the image displaying the organ. an ultrasonic radiation detector that receives ultrasonic radiation scattered from the label or an electromagnetic radiation detector that receives electromagnetic radiation scattered from the one or more labels;
27. A system as claimed in claim 26 .