Endoscopes With Improved Compatibility To Oxidative Processings And Methods For Manufacturing And Repairing The Same
An endoscope with particular adhesive elements and/or particular internal dry lubricants have improved compatibility to various oxidative processes such as the ones used for terminal sterilization. The particular adhesive elements and particular internal dry lubricants are disclosed herein. A method of manufacturing an endoscope and a method of repairing an old endoscope are also disclosed herein.
1 . An endoscope with improved compatibility to oxidative processing, said endoscope having a distal end region, said endoscope comprising
an insertion tube sealingly connected to the distal end region
a tubular bending section having a first end sealed to the distal end region and a second end sealed to the insertion tube; and
an adhesive element comprising an acrylated urethane, said adhesive element sealing the tubular bending section to the distal end region and to the insertion tube.
2 . The endoscope of claim 1 , wherein the adhesive element is a reaction product of a urethane oligomer and an acrylate.
3 . The endoscope of claim 2 , wherein the acrylate is a methacrylate monomer.
4 . The endoscope of claim 2 , wherein prior to curing the adhesive element a blend of the urethane oligomer and the acrylate has a viscosity of from 3000 to 15000 cP, when measured at 20 rpm and in accordance with ASTM D2556.
5 . The endoscope of claim 1 , wherein the endoscope is a GI endoscope.
6 . A method for manufacturing an endoscope with improved compatibility to oxidative processing, said endoscope having a distal end region and an insertion tube configured to be sealingly connected to the distal end region, said method comprising the steps of:
providing a tubular bending section having a first end configured to be sealed to the distal end region and a second end configured to be sealed to the insertion tube;
providing an adhesive comprising a blend of urethane and acrylate;
connecting the first end of the tubular bending section to the distal end region with the adhesive; and
connecting the second end of the tubular bending section to the insertion tube with the adhesive.
7 . The method of claim 6 , wherein the adhesive is a one-part adhesive configured to be UV cured, the method further comprising the step of UV curing the adhesive.
8 . The method of claim 6 , wherein providing the adhesive comprises providing an adhesive that has a viscosity of from 3000 to 15000 cP, when measured at 20 rpm and in accordance with ASTM D2556.
9 . The method of claim 6 , wherein the urethane is a urethane oligomer and the acrylate is a methacrylate monomer.
10 . The method of claim 6 , wherein connecting the first end and the connecting the second end individually comprise applying a plurality of successive layers of the adhesive, with each successive layer having a viscosity lower than a viscosity of a previous layer.
11 . The method of claim 6 , wherein the endoscope is a GI endoscope.
12 . The method of claim 6 , further comprising sterilizing the endoscope in a H 2 O 2 sterilization process under vacuum, an ozone sterilization process under vacuum, or a H 2 O 2 and ozone sterilization process under vacuum.
13 . A method for repairing an endoscope, the endoscope having a distal end region and an insertion tube configured to be sealingly connected to the distal end region, said method comprising the steps of:
removing an old tubular bending section extending between the distal end region and the insertion tube;
providing a new tubular bending section having a first end configured to be sealed to the distal end region and a second end configured to be sealed to the insertion tube;
providing an adhesive comprising a blend of a urethane and an acrylate monomer;
connecting the first end of the tubular bending section to the distal end region with the adhesive;
connecting the second end of the tubular bending section to the insertion tube with the adhesive; and
UV curing the adhesive;
wherein the endoscope has enhanced compatibility with a H 2 O 2 sterilization process under vacuum, an ozone sterilization process under vacuum, or a H 2 O 2 and ozone sterilization process under vacuum.
14 . The method of claim 13 , wherein the urethane is a urethane oligomer and the acrylate is a methacrylate monomer.
15 . The method of claim 13 , wherein the blend of urethane and acrylate has a viscosity of from 3,000 to 15,000 cP, when measured at 20 rpm and in accordance with ASTM D2556.
16 .- 53 . (canceled)