US 12,403,224 B2
Viscoelastic composition
Tomonori Yano, Tochigi (JP); Atsushi Ohhata, Tokushima (JP); Toshihiro Goto, Tokushima (JP); and Yuji Hiraki, Tokushima (JP)
Assigned to Jichi Medical University, Tokyo (JP); and Otsuka Pharmaceutical Factory, Inc., Tokushima (JP)
Filed by Jichi Medical University, Tokyo (JP); and Otsuka Pharmaceutical Factory, Inc., Tokushima (JP)
Filed on Aug. 16, 2021, as Appl. No. 17/403,232.
Application 17/403,232 is a continuation of application No. 15/764,243, granted, now 11,458,229, previously published as PCT/JP2016/078704, filed on Sep. 28, 2016.
Claims priority of application No. 2015-195105 (JP), filed on Sep. 30, 2015.
Prior Publication US 2021/0369922 A1, Dec. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61L 31/04 (2006.01); A61B 1/015 (2006.01); A61B 1/12 (2006.01); A61L 29/02 (2006.01); A61L 29/04 (2006.01); A61L 29/14 (2006.01); A61L 31/02 (2006.01); A61L 31/14 (2006.01)
CPC A61L 31/042 (2013.01) [A61B 1/015 (2013.01); A61B 1/126 (2013.01); A61L 29/02 (2013.01); A61L 29/043 (2013.01); A61L 29/14 (2013.01); A61L 31/028 (2013.01); A61L 31/041 (2013.01); A61L 31/14 (2013.01); A61L 31/145 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for securing the field of view of an endoscope, the method comprising feeding a viscoelastic composition comprising a thickening substance and water and having an electrical conductivity of 250 μS/cm or less from a proximal part of the endoscope, through a channel, into a distal part of the endoscope so as to physically push aside or remove dark-colored liquid or a semi-solid material accumulated inside a canal, thereby securing the field of view of the endoscope, and wherein the thickening substance comprises a gum, wherein the gum is selected from the group consisting of flaxseed gum, gum Arabic, welan gum, Cassia gum, gum ghatti, karaya gum, xanthan gum, guar gum, guar gum enzymolysis products, psyllium seed gum, Artemisia sphaerocephala seed gum, gellan gum, tamarind gum, tara gum, tragacanth gum, macrophomopsis gum, Rhamsan gum, locust bean gum, diutan gum, and sesbania gum.