Overtube and medical device using this overtube

An overtube comprising:

• a longitudinally extending flexible tubular body having a proximal portion and an open distal end,
• a first duct designed to house a first tube for inserting a first endoscope into the body, with the possibility of longitudinal displacement of said first tube in said first duct and rotational movement of said first tube about its longitudinal axis, which first duct is arranged longitudinally inside said body and opens at the distal end of said body,
• a second duct designed to house a second tube for inserting a second endoscope into the body, with the possibility of longitudinal displacement of said second tube in said second duct and rotational movement of said second tube about its longitudinal axis, which second duct is arranged longitudinally inside said body and opens at the distal end of said body,
• a first orifice made in the proximal portion of the body for introducing the first insertion tube into the first duct,
• a second orifice made in the proximal portion of the body for introducing the second insertion tube into the second duct,
• a third orifice made in the proximal portion of the body for introducing lubricant into the first duct and into the second duct,
• wherein the first duct and the second duct communicate with each other, at least in the length of the body that does not include the proximal portion, through a communication passage, which opens at the third orifice,
• and wherein the communication passage connecting the first duct to the second duct is narrower than said ducts.

A medical device, comprising:

• a first endoscope comprising:
• a first flexible insertion tube having a first distal portion equipped with tip deflection, inside which is arranged a first operating channel for inserting a first surgical instrument, which first channel opens at a first distal end of said first tube,
• a first optical viewing device located at the first distal end of the first insertion tube,
• a first control handle connected to a proximal end of the first insertion tube,
• a second endoscope comprising:
• a second flexible insertion tube having a second distal portion equipped with tip deflection, inside which is arranged a second operating channel for inserting a second surgical instrument, which second channel opens out at a second distal end of said second tube,
• a second optical viewing device located at the second distal end of the second insertion tube,
• a second control handle connected to a proximal end of the second insertion tube.

An overtube comprising:

• a longitudinally extending flexible tubular body having a proximal portion and an open distal end,
• a first duct designed to house a first tube for inserting a first endoscope into the body, with the possibility of longitudinal displacement of said first tube in said first duct and rotational movement of said first tube about its longitudinal axis, which first duct is arranged longitudinally inside said body and opens at the distal end of said body,
• a second duct designed to house a second tube for inserting a second endoscope into the body, with the possibility of longitudinal displacement of said second tube in said second duct and rotational movement of said second tube about its longitudinal axis, which second duct is arranged longitudinally inside said body and opens at the distal end of said body,
• a first orifice made in the proximal portion of the body for introducing the first insertion tube into the first duct,
• a second orifice made in the proximal portion of the body for introducing the second insertion tube into the second duct,
• a third orifice made in the proximal portion of the body for introducing lubricant into the first duct and into the second duct,
• wherein the first duct and the second duct communicate with each other, at least in the length of the body that does not include the proximal portion, through a communication passage, which opens at the third orifice,
• and wherein the communication passage connecting the first duct to the second duct is narrower than said ducts, wherein:
• the first insertion tube is housed in the first duct, and the first distal portion and the first distal end of said first tube protrude out of said first duct and the body through the distal end of said body,
• the second insertion tube is housed in the second duct, and the second distal portion and the second distal end of said second tube protrude out of said second duct and the body through the distal end of said body.