Patent EA-002954-B1 (EA)
Title: Endoscope with single-use cartridge for the invagination of endoscopic tubes
IPC: A61B1/32
Filed: 1998-10-02
Abstract: 1. An endoscope, comprising: - an invaginator in the shape of a thin-walled everabte under the action of gas or liquid pressure tube, arranged by layers transversely to the longitudinal axis of the endoscopic tube (3) on its distal part, - an insertion unit of the invaginator consisting of a compressed spring (10) and an element for hennetization of the cavity of excess gas or liquid pressure, joined with an uneverted end (7) of the invaginator, - a proximal seal (13) of the endoscopic tube (3), wherein the invaginator (23) is made in the shape of compact hollow cylinder, placed with a gap (25) to the endoscopic tube (3), so that cylinder keeps the external diameter and said gap (25) under the action on it of the insertion unit of the invaginator (23) and of the working pressure of gas or liquid. 2. The endoscope according to claim 1, wherein said invaginator (23) has periodic narrowings and widenings (24) of the external and internal diameters. 3. The endoscope according to claim 1, wherein said invaginator (23) consists of different-form, short, tightly compressed pleats of a thin-walled eversible tube, which are arranged under different angles to each other. 4. The endoscope according to claim 1, wherein the outer and inner surfaces of said cylinder of invaginator (23) have a covering, fixing compressed pleats of a thin-walled eversible tube, destroyable under its everting. 5. The endoscope according to claim 1, where in said invaginator (23) is placed with a gap (14) in a shell (22), whose distal end is connected with an everted end (12) of the invaginator (23), but the proximal one has a projection (31). 6. The endoscope according to claim 5, further comprising a distal preservative (26), the proximal and distal areas (28) of said preservative are hermetically connected with an areas (28) of the distal part of the endoscopic tube (3), at that the proximal area (20) of said preservative (26) has a stop (11), interacting with the spring (10) and the projection (31) of the shell (22), but the distal area (28) of said preservative (26) is fastened on the distal end of endoscopic tube by a tip (6). 7. The endoscope according to claim 5, wherein the insertion unit of invaginator (23) is supplied with a distancer (30), interacting with the distal end of spring (10) and the proximal end of the cylinder of invaginator (23), but between said distancer (30) and the shell (22) a sealing elastic ring (34), fixing the compressed spring (10), is placed. 8. The endoscope according to claim 1, further comprising a mechanism (53) for insertion of tube (3) made in the shape of a cylinder (56) with a proximal and distal pistons (57) which are interconnected by a distancers (58) and an elastic tube (59), but a cavity (60) between said pistons (57) and said elastic tube (59) communicates with a source of negative/positive pressure, at that a cavity (161) between the proximal seal (13) of the endoscopic tube (3) and the distal piston (57) communicates with a source of negative/positive pressure and an opposing spring (82) is placed in the cavity (61). 9. The endoscope according to claim 1, wherein the system for bending of the distal end of endoscope tube (3) is suppled with a tubes (36), (37) located therein, on the distal end of said tubes there are "cylinder-piston" units whose pistons are connected with traction lines (40), (41) for bending the distal end, but the proximal ends of said tubes (36), (37) are connected with sources (45) of positive and negative pressure. 10. The endoscope according to claim 1, wherein a body of biopsy forceps (63) is made in the shape of a flexible tube on distal end of said tube outsidely a piston (66) is placed commensurably to the internal diameter of the biopsy channel of the endoscopic tube (3), but insidely the "cylinder-piston" unit is placed, the piston of said unit is connected with a traction line, at that the cavity of the biopsy channel and the cavity of the flexible tube of biopsy forceps communicates with the sources of positive/negative pressure, but the place of entrance (57) into the biopsy channel has a seal (64).