Multiple Band Endoscopic Ligation Device

Patent metadata

Field	Value
Publication number	US-2016374688-A1
Application number	US-201615194121-A
Country	US
Kind code	A1
Filing date	Jun 27, 2016
Priority date	Nov 19, 2012
Publication date	Dec 29, 2016
Grant date	—

Abstract

A multiple band endoscopic ligation device comprises a single pull string and a plurality of beads positioned on said pull string and between each successive band. The device is configured to be coupled to the distal end of an endoscope and is used to deploy multiple elastic bands around target tissues to be ligated. The device includes a tapered cylindrical body about which a plurality of elastic bands are stretched and positioned. The pull string includes multiple sets of two beads fixed to the string wherein one bead is placed directly behind and in contact with the other. The string is wrapped around the device's body and under each band such that at least one pair of beads is positioned between the elastic bands and one pair of beads is positioned proximally to the most proximal band. As the string is pulled, the beads push the bands sequentially off the distal end of the device and around a tissue to be ligated. The use of two adjacent beads on the string to push off each band ensures that the bands will not slip over the beads, thereby preventing a misfire.

First claim

1 . An endoscopic ligation device for use with an endoscope having a proximal end and a distal end and a first tubular channel therebetween, said device comprising:
a. a cylindrical body having a smooth external surface, a diameter, a proximal end and a distal end and a second tubular channel therebetween wherein said proximal end of said cylindrical body is configured to couple to said distal end of said endoscope such that said first tubular channel is in fluid communication with said second tubular channel; b. a plurality of elastic bands having a most proximal elastic band and a most distal elastic band, wherein each band is stretched beyond its relaxed diameter and positioned around said external surface of said cylindrical body and further wherein said relaxed diameter of each band is less than the diameter of said cylindrical body; and, c. a single pull line having a plurality of bead sets fixed along its length, wherein each of said bead sets comprises at least two beads positioned one directly behind and in contact with the other, further wherein said pull line has a first end and a second end and is wrapped around said external surface of said cylindrical body multiple times and under said elastic bands such that at least one set of beads is positioned between said elastic bands.

2 . The endoscopic ligation device of claim 1 , wherein said first end of said pull line comprises a bead set and is positioned proximal to said most proximal elastic band and said second end of said pull line passes over the distal end of said cylindrical body, into said second tubular channel, through said first tubular channel, and to a retracting assembly at the proximal end of said endoscope.

3 . The endoscopic ligation device of claim 2 , wherein said retracting assembly comprises any one of a spooling mechanism, a linear mechanism, and a cam mechanism.

4 . The endoscopic ligation device of claim 1 , wherein said cylindrical body has a first diameter at said proximal end and a second diameter at said distal end wherein said first diameter is greater than said second diameter and wherein said first and second diameters are greater than said relaxed diameter of said elastic bands.

5 . The endoscopic ligation device of claim 1 , wherein said beads are made of any one of glass, hard plastic, and ceramic.

6 . The endoscopic ligation device of claim 1 , wherein each of said beads measures between 0.040 and 0.060 inches in height and has a thickness of between 0.050 and 0.090 inches.

7 . The endoscopic ligation device of claim 1 , wherein each of said plurality of elastic bands has a height of approximately 0.040 inches.

8 . The endoscopic ligation device of claim 1 , wherein said beads are fixed to said pull line with glue.

9 . The endoscopic ligation device of claim 1 wherein said plurality of elastic bands equals seven.

10 . The endoscopic ligation device of claim 1 wherein said pull line passes one quarter length around the outer surface of said cylindrical body between each set of bands.

11 . An endoscopic ligation device for use with an endoscope having a proximal end and a distal end and a first tubular channel therebetween, said device comprising:
a. a cylindrical body having a smooth external surface, a diameter, a proximal end and a distal end and a second tubular channel therebetween, wherein said proximal end of said cylindrical body is configured to couple to said distal end of said endoscope such that said first tubular channel is in fluid communication with said second tubular channel; b. a plurality of elastic bands, each band stretched beyond its relaxed diameter and positioned around said external surface of said cylindrical body wherein said relaxed diameter of each band is less than the external diameter of said cylindrical body; and, c. a single pull line having a plurality of large beads fixed along its length, wherein said pull line has a first end and a second end and is wrapped around said external surface of said cylindrical body multiple times and under said elastic bands such that at least one bead, having a height within the range of 0.040 to 0.060 inches and a thickness within the range of 0.070 to 0.140 inches, is positioned between said elastic bands.

12 . The endoscopic ligation device of claim 11 , wherein said first end of said pull line comprises a single bead and is positioned proximal to said most proximal elastic band and said second end of said pull line passes over the distal end of said cylindrical body, into said second tubular channel, through said first tubular channel, and to a retracting assembly at the proximal end of said endoscope.

13 . The endoscopic ligation device of claim 12 , wherein said retracting assembly comprises any one of a spooling mechanism, a linear mechanism, and a cam mechanism.

14 . The endoscopic ligation device of claim 11 , wherein said cylindrical body has a first diameter at said proximal end and a second diameter at said distal end wherein said first diameter is greater than said second diameter and wherein said first and second diameters are greater than said relaxed diameter of said elastic bands.

15 . The endoscopic ligation device of claim 11 , wherein said beads are made of any one of glass, hard plastic, and ceramic.

16 . The endoscopic ligation device of claim 11 , wherein said beads are fixed to said pull line with glue.

17 . The endoscopic ligation device of claim 11 , wherein each of said plurality of elastic bands has a height of 0.040 inches.

18 . The endoscopic ligation device of claim 11 , wherein said plurality of elastic bands equals seven.

19 . A method for ligating internal body tissues, said method comprising the steps of:
a. providing an endoscopic ligation device for use with an endoscope having a proximal end and a distal end and a first tubular channel therebetween, said device comprising:
i. a cylindrical body having a smooth external surface, a diameter, a proximal end and a distal end and a second tubular channel therebetween wherein said proximal end of said cylindrical body is configured to couple to said distal end of said endoscope such that said first tubular channel is in fluid communication with said second tubular channel;
ii. a plurality of elastic bands having a most proximal elastic band and a most distal elastic band, wherein each band stretched beyond its relaxed diameter and positioned around said external surface of said cylindrical body and further wherein said relaxed diameter of each band is less than the external diameter of said cylindrical body; and,
iii. a single pull line having a plurality of bead sets fixed along its length, wherein each of said bead sets comprises at least two beads positioned one directly behind and in contact with the other, further wherein said pull line has a first end and a second end and is wrapped around said external surface of said cylindrical body multiple times and under said elastic bands such that at least one set of beads is positioned between said elastic bands;
iv. wherein said first end of said pull line comprises a bead set and is positioned proximal to said most proximal elastic band and said second end of said pull line passes over the distal end of said cylindrical body, into said second tubular channel, through said first tubular channel, and to a retracting assembly at the proximal end of said endoscope;
b. attaching said proximal end of said device to said distal end of said endoscope; c. inserting said distal end of said endoscope with attached device into a patient

Assignees

• Endochoice Inc

Inventors

• Knotts David Joseph

Classifications

• A61B17/12013 Primary

  for use in minimally invasive surgery, e.g. endoscopic surgery · CPC title

• A61B17/00234

  for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence) · CPC title

• A61B2017/00296

  mounted on an endoscope · CPC title

• A61B2017/12018

  Elastic band ligators · CPC title