Endoscope system including endoscope and disposable protection cover

A protection cover for use in an endoscope system including an endoscope having an insertion section for insertion into a cavity under inspection and an operation section to which a proximal end of the insertion section is connected, said insertion section having a semicircular cross-sectional configuration, said protection cover comprising:

• an insertion section cover for covering said insertion section of the endoscope;
• a multilumen tube having a non-circular cross-sectional configuration at first and second ends of said mutilumen tube and disposed within said insertion section cover to extend from a proximal end to a distal end of said insertion section cover, a plurality of conduit channels being formed in said multilumen tube and extending from said proximal end to said distal end, said cross-sectional configuration of said multilumen tube at said first end having a size which is substantially identical to a size of said cross-sectional configuration of said multilumen tube at said second end.

A protection cover system for use in an endoscope system including an endoscope having an insertion section for insertion into a cavity under inspection and an operation section to which a proximal end of the insertion section is connected, said protection cover system comprising:

• a plurality of individual protection covers, each having a forceps channel and insertion section cover having an insertion section channel,
• wherein each of said protection covers has at least one of (i) a diameter of the forceps channel, (ii) a length of the insertion section cover, and (iii) a diameter of said insertion section channel which is different from a corresponding one of each of the other protection covers and each of said protection covers further has (i) a first recess formed therein for connecting said insertion section cover with an operation section cover, (ii) a second recess formed therein for aiding in supporting the protection cover, and (iii) a nipple for use in inflating the cover, and one of said first recess, said second recess and said nipple is commonly formed for all of said protection covers.