Patent RU-2759594-C1 (RU)
Title: System built into duodenum for releasing cannula for jejunum and method of its use
Inventor: SYUJ TYANKHUN
IPC: A61F2/04
Filed: 2019-04-30
Granted: 2021-11-15
Abstract: FIELD: medical instruments.SUBSTANCE: group of inventions relates to the technical field of medical instruments, in particular to a system for releasing a cannula for the jejunum embedded in the duodenum (a system for releasing a cannula for the jejunum embedded in the duodenum), for reflux of food digested by the stomach, and the method of its use. The system for releasing the jejunum cannula, embedded in the duodenum, contains an implanting device, a pushing node, a cable (30) for fixing and a cable (50) for releasing. The implanting device contains a tubular sheath (40) for storage, a release mechanism (10), a membrane tube (20) and a stent (60). The tubular sheath for storage is made in the form of a tube and has a proximal opening and a distal opening. The membrane tube (20) and the stent (60) to be released are placed in a tubular shell (40) for storage in a folded state. The proximal end of the membrane tube (20) is connected to the distal end of the stent (60). The release mechanism (10) is made on the distal opening of the tubular shell (40) for storage and is connected to the distal end of the membrane tube (20). The pushing assembly contains a wire guide (74) of the pushing-pulling type, an inner tube (73), a middle tube (72) and an outer tube (71), which are put on top of each other sequentially from the inside out and are made to move relative to each other, and the distal end of the wire guide (74) of the pushing-pulling type rests against the release mechanism (10). Part of the inner tube (73) is located inside the tubular shell (40) for storage and is connected to the release mechanism (10). One end of the middle tube (72) passes into the tubular shell (40) for storage through the proximal opening of the tubular shell (40) for storage, and the specified end of the middle tube is provided with a fixed pushing block (41) located in the tubular shell for storage, for pushing the stent. The outer tube (71) is located outside the tubular shell (40) for storage and has one end, directly or indirectly connected to the proximal opening of the tubular shell for storage. One end of the release cable (50) is fixed to the inner tube (73), and the other end of the release cable (50) is the free end. One end of the cable (30) for fixing is fixed to the middle tube (72), and the other end of the cable (30) for fixing interacts with the free end of the cable (50) for release to form a sliding node for connecting the membrane tube (20) and the release mechanism (10). The method for using the above system to release a cannula for the jejunum embedded in the duodenum includes the following steps, according to which: 1) direct the implanting device into the duodenum by means of a wire guide; 2) control the middle tube (72) to ensure that the pushing unit (41) can be set in motion by the middle tube with its movement away from the operator in order to remove the release mechanism (10) and the tubular shell (40) for storage from interacting with each other, and there is no displacement between the inner tube (73) and the release mechanism (10); 3) control the inner tube (73) to ensure that the inner tube of the release mechanism (10) can be pushed with its movement away from the operator to deploy the membrane tube (20); 4) maintain the position of the release mechanism (10) by means of a push-pull wire guide (74), control the inner tube (73) to move it towards the operator, and the inner tube drives the free end of the cable (50) for release in order to separate it from the cable (30) for fastening, so that the sliding assembly connecting the membrane tube (20), the release mechanism (10) and the inner tube (73) is released; and 5) control the middle tube (72) and/or the outer tube (71) to allow the stent (60) to be separated from the tubular sheath (40) for storage and its insertion into a predetermined position in the intestinal tract.EFFECT: invention has a simple design, is easy to operate and can be easily distributed.10 cl, 10 dwg