CN115517974A

CN115517974A - Actively bendable sheath and bendable nasal gastrointestinal tube with sheath body

Info

Publication number: CN115517974A
Application number: CN202211212675.3A
Authority: CN
Inventors: 谢浩芬; 汪洁; 仇静霞; 邬静密; 徐琴鸿; 蔡泽君
Original assignee: Ningbo First Hospital
Current assignee: Ningbo First Hospital
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-27

Abstract

The invention provides an actively bendable sheath tube and a sheath body bendable nasal gastrointestinal tube, wherein the actively bendable sheath tube comprises an operating part, a sheath main body, a front section bending component, a middle section bending component and a tail section bending component, the front section bending component, the middle section bending component and the tail section bending component are respectively arranged at two sides of the sheath main body, the front section bending component, the middle section bending component and the tail section bending component are not collinear, the operating part is connected with the sheath main body, and the front section bending component, the middle section bending component and the tail section bending component are used for controlling the bending of the sheath main body.

Description

Actively bendable sheath and bendable nasal gastrointestinal tube with sheath body

Technical Field

The invention relates to the field of medical instruments, in particular to an actively bendable sheath and a sheath bendable nasal gastrointestinal tube.

Background

Stomach tube need be placed through the nasal cavity to stomach tube is placed to tradition pernasal, and gets into the stomach through the nasal cavity and need pass through the throat position, and there are trachea and esophagus in the throat position so need distinguish esophagus and trachea when placing the stomach tube, in actual operation, the stomach tube that the pernasal was placed can appear selecting the difficulty, is difficult to arrange the stomach tube in the esophagus.

The traditional stomach tube can only reach the bottom of the stomach at most when being used for medicine feeding or sucking, namely, only can carry out sucking or medicine feeding work on the stomach, and when the medicine feeding or sucking work is needed to be carried out on a position lower than the stomach, such as the duodenum or the jejunum, the traditional stomach tube cannot enter the duodenum or the jejunum through the pylorus at the bottom of the stomach.

Disclosure of Invention

One major advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube, wherein the actively bendable sheath is matched with the visible optical fiber so as to guide the actively bendable sheath to selectively enter the esophagus under visible conditions, thereby improving the efficiency and success rate of placing gastric tubes through the nose.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube, wherein the multi-segmented bending structure of the actively bendable sheath is adapted to fit the bending structure from the pylorus to the duodenum of the stomach fundus, so that the actively bendable sheath can enter the duodenum along the fundus of the stomach.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube, wherein the sliding sheath can reduce the friction between the actively bendable sheath and the body tissue of the patient, so as to facilitate the actively bendable sheath to enter the stomach from the nasal cavity of the patient, thereby further reducing the discomfort of the patient.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube, wherein the actively bendable sheath is divided into three sections, each of which can be bent at different angles, so that the actively bendable sheath can be bent into different shapes to adapt to the shape from pylorus at the fundus of the stomach to duodenum, and the actively bendable sheath can conveniently enter duodenum or jejunum through the pylorus at the fundus of the stomach.

It is another advantage of the present invention to provide an actively bendable sheath and sheath bendable nasogastric tube wherein the anterior and middle bending assemblies and the tail bending assembly are not collinear with each other, i.e. the bending direction of each sheath is unique, thereby combining different bending directions to meet the requirement of actually placing the nasogastric tube to the bottom of the stomach.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube, the sheath bendable nasogastric tube including a bendable guiding sheath adapted to be bent to adjust an angle to cooperate with the visible optical fiber to enter the duodenum of a patient for treatment.

Another advantage of the present invention is to provide an actively bendable sheath and sheath bendable nasogastric tube that provides visibility, increasing speed and efficiency of intubation.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube that provides visibility, reducing operator requirements.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube that provides visibility, avoiding some uncertainty factors due to blind insertion.

Another advantage of the present invention is to provide an actively bendable sheath and a sheath bendable nasogastric tube that reduces the cost of using the nasogastric tube.

In accordance with one aspect of the present invention, there is provided an actively bendable sheath capable of achieving the foregoing and other objects and advantages, the actively bendable sheath comprising:

an operation part;

a sheath main body, the sheath main body comprises a front section sheath body, a middle section sheath body and a tail section sheath body, the front section sheath body, the middle section sheath body and the tail section sheath body are sequentially connected, and the tail section sheath body is connected with the operation part;

the front-section bending assembly comprises at least one head end guide hose and a head end inhaul cable, the head end guide hose extends from the operating part to the connecting position of the front-section sheath body and the middle-section sheath body, the head end inhaul cable penetrates through the head end guide hose, one end of the head end inhaul cable is connected to the operating part, the other end of the head end inhaul cable is fixed to the top end of the front-section sheath body, and the operating part is suitable for controlling the head end inhaul cable to enable the front-section sheath body to bend;

the middle-section bending assembly comprises at least one middle-section guiding hose and a middle-section inhaul cable, the middle-section guiding hose extends from the operation part to the connecting position of the middle-section sheath body and the tail-section sheath body, the middle-section inhaul cable penetrates through the middle-section guiding hose, one end of the middle-section inhaul cable is fixed at the connecting position of the front-section sheath body and the middle-section sheath body, the other end of the middle-section inhaul cable is connected to the operation part, and the operation part is suitable for controlling the head-end inhaul cable to bend the middle-section sheath body; and

a crooked subassembly of back end, the crooked subassembly of back end includes an at least back end guide hose and a back end cable, back end guide hose one end is fixed in operation portion, the other end to the middle section sheath body with back end sheath body hookup location extends predetermined distance, the back end cable is worn to locate back end guide hose, back end cable one end is fixed in the middle section sheath body with back end sheath body hookup location, the other end connect in operation portion, operation portion is suitable for control the back end cable makes the crooked of back end sheath body, the crooked subassembly of anterior segment with the crooked subassembly of middle section and the crooked subassembly of back end is not the collineation mutually.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1 is a schematic view of the overall structure of the actively bendable sheath according to a preferred embodiment of the present invention.

Fig. 2A is a perspective view showing the overall structure of the active bendable sheath according to a preferred embodiment of the present invention.

Fig. 2B is a partial structural view of the active bendable sheath according to a preferred embodiment of the invention.

Fig. 3 is a schematic view of the bending state of the actively bendable sheath according to a preferred embodiment of the invention.

Fig. 4 is a schematic view illustrating a use state of the active bendable sheath for a stomach according to a preferred embodiment of the invention.

FIG. 5 is a schematic view of the magnetic attraction fixture for the visible optical fiber mounted on the operation part according to a preferred embodiment of the invention.

FIG. 6 is a schematic diagram of the overall structure of the gastrointestinal tube according to a preferred embodiment of the present invention.

Fig. 7 is a schematic view of an application scenario of the sheath bendable nasogastric tube according to another preferred embodiment of the invention.

FIG. 8 is an overall schematic view of the sheath bendable nasogastric tube according to another preferred embodiment of the present invention.

FIG. 9 is an exploded view of the bendable nasogastric tube of the sheath according to another preferred embodiment of the present invention.

FIG. 10 is a sectional view of a part of a bendable sheath of a nasogastric tube according to another preferred embodiment of the present invention.

FIG. 11 is a schematic view of the bendable tube bending of the bendable nasogastric tube of the sheath according to another preferred embodiment of the present invention.

FIG. 12 is a schematic view of the flexible nasogastric tube of the sheath according to another preferred embodiment of the invention.

FIG. 13 is a partial cross-sectional view of the operating handle of the sheath bendable nasogastric tube according to another preferred embodiment of the present invention.

FIG. 14 is a partial cross-sectional view of the nasogastrointestinal tube of the sheath bendable nasogastrointestinal tube according to another preferred embodiment of the present invention.

FIG. 15 is an overall perspective view of the sheath bendable nasogastric tube according to another preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The first embodiment is as follows:

referring to fig. 1 to 4, the actively bendable sheath according to a preferred embodiment of the present invention is illustrated.

The actively bendable sheath 6 is used for nasogastric tube surgery, and it will be understood by those skilled in the art that the actively bendable sheath 6 can also be used for other surgeries.

Actively bendable sheath 6 is used for the intranasal to place the stomach tube, actively bendable sheath 6 anterior segment can be crooked, that is to say actively bendable sheath 6 gets into after the patient nasal cavity, can be actively crooked when patient's throat position to select in patient's throat position, also selective entering esophagus position avoids actively bendable sheath 6 gets into the trachea, causes the accident.

The actively bendable sheath tube 6 is also used for sucking, administering or perfusing nutrient solution to the stomach, and sometimes also used for sucking, administering or perfusing nutrient solution to the intestinal tract, that is, from the fundus pylorus to the duodenum or jejunum, and the body passage from the fundus pylorus to the duodenum or jejunum is relatively curved, so that the actively bendable sheath tube 6 can actively bend to adapt to the path from the fundus pylorus to the duodenum, and the actively bendable sheath tube 6 can work in the duodenum or jejunum.

In detail, the sheath bendable nasogastric tube 9 includes an actively bendable sheath 6 and a visible optical fiber 7 and a gastrointestinal tube 8.

Visual optic fibre 7 can wear to locate actively can buckle sheath pipe 6, and let visual optic fibre 7's end with the end parallel and level of actively can buckle sheath pipe 6, like this visual optic fibre 7's field of vision scope is exactly the field of vision scope of actively can buckle sheath pipe 6 is convenient actively select the esophagus to advance when can get into patient's throat position under the circumstances in the field of vision and go into, improve intranasal stomach tube place the success rate, also avoid simultaneously actively can buckle sheath pipe 6 gets into the trachea and causes unexpected injury for the patient.

After actively bendable sheath 6 entered the stomach along the esophagus, the visible fiber 7 can be withdrawn, at this time, the gastrointestinal tube 8 can be placed into the stomach along the internal channel of the actively bendable sheath 6, and the stomach is sucked, perfused with nutrient solution or dosed to the stomach through the gastrointestinal tube 8.

In some cases, the drug administration or other work is carried out on the intestinal tract of the patient, the visual optical fiber 7 provides a visual field for the active bendable sheath 6, the active bendable sheath 6 can conveniently enter the duodenum from the pylorus at the bottom of the stomach, the visual optical fiber 7 is withdrawn at the moment, the gastrointestinal tube 8 is placed along the active bendable sheath 6, the gastrointestinal tube 8 is placed in the duodenum or the jejunum for drug administration or other work, and the tube placement work from the nose to the intestine is further completed.

In detail, the actively bendable sheath 6 may include an operation portion 61, a sheath main body 62, and a front bending element 63, a middle bending element 64 and a tail bending element 65 mounted to the sheath main body 62.

The bending direction of the sheath main body 63 can be adjusted by the anterior bending component 63, the middle bending component 64 and the tail bending component 65, so that the actively bendable sheath tube 6 can be actively bent to select the esophagus to enter the stomach when passing through the throat position of a patient, and when the intestinal tract needs to be worked, the sheath main body 62 is bent by the mutual matching of the anterior bending component 63, the middle bending component 64 and the tail bending component 65, and the bent shape is suitable for fitting the shape from the fundus pylorus to the duodenum or the jejunum, so that the actively bendable sheath tube 6 can be worked in the intestinal tract of the patient.

The operating portion 61 is an operating handle, into which a control system for controlling the front bending assembly 63 and the middle bending assembly 64 and the tail bending assembly 65 are integrated, and the operating portion 61 has a mounting passage for mounting the sheath body 62, through which the visible light fiber 7 and the gastrointestinal tube 8 pass and enter the sheath body 62 during operation.

Sheath main part 62 includes an anterior segment sheath body 621, a middle section sheath body 622 and a tail section sheath body 623, anterior segment sheath body 621 with the middle section sheath body 622 and the tail section sheath body 623 connects gradually and forms a whole sheath pipe, that is to say, forms the even pipe form sheath body of the unanimity about a whole diameter, sheath main part 62 inner wall is even and smooth, convenient visual optic fibre 7 with gastrointestinal tube 8 is in the inside removal of sheath main part 62. One end of the tail sheath 623 is connected to the middle sheath 622, and the other end is fixedly connected to the operation portion 61.

The anterior segment sheath 621 includes a plurality of ring-shaped holders 6211 and a fixing film 6212, the ring-shaped holders 6211 are arranged in parallel with a certain distance between the axes of the centers of the ring-shaped holders 6211 to form a supporting framework of the anterior segment sheath 621, the fixing film 6212 covers the ring-shaped holders 6211 to connect the ring-shaped holders 6211, in other words, the fixing film 6212 is a circular tube-shaped thin film, and the ring-shaped holders 6211 are biased to the inside of the fixing film to expand the fixing film 6212, so as to form a passage through which the visible optical fiber 7 or the gastrointestinal tube 8 can pass.

The ring-shaped holders 6211 may be thin ring-shaped, such as stainless steel ring, or hollow cylinder with a certain height, the ring-shaped holders 6211 are arranged with a certain interval therebetween, and the fixing film 6212 fills the gap between two adjacent ring-shaped holders 6211, so as to connect and fix a plurality of ring-shaped holders 6211 to form the front segment sheath 621.

The securing membrane 6212 has a certain flexibility and support to ensure the consistent distance between two spaced-apart ring supports 6211, i.e., to ensure the overall stability of the anterior segment sheath 621.

The fixing membrane 6212 can be covered and connected to the plurality of the ring-shaped holders 6211 from the outside of the ring-shaped holder 6211, that is, the fixing membrane 6212 is located at the outside of the ring-shaped holder 6211, the fixing membrane 6212 can be covered and fixedly connected to the ring-shaped holder 6211 from the inside of the ring-shaped holder 6211 to the outside, the fixing membrane 6212 connects the plurality of the ring-shaped holders 6211 to form a whole, so that the anterior segment sheath 621 has a certain flexibility and support property and keeps straight in a natural state.

The middle sheath 622 includes a first spiral elastic skeleton 6221 and a first connecting membrane 6222, the diameter of the first spiral elastic skeleton 6221 is identical to that of the annular support 6211, one end of the first spiral elastic skeleton 6221 is connected to the front sheath 621, and the other end is connected to the tail sheath 623. The first helical resilient backbone 6221 can be a metal spring, so that the middle sheath 622 can keep a straight shape in a natural state and can be bent when receiving an external force.

The first connecting membrane 6222 is covered and connected to the first spiral elastic skeleton 6221 to keep the middle sheath 622 in a sealed tubular shape, the first connecting membrane 6222 is further integrally connected to the fixing membrane 6212 to keep the front sheath 621 and the middle sheath 622 in a sealed tubular shape, the thickness of the first connecting membrane 6222 is larger than the diameter of the first spiral elastic skeleton 6221, that is, the first spiral elastic skeleton 6221 can be embedded into the first connecting membrane 6222, and the smoothness of the inner walls of the front sheath 621 and the middle sheath 622 is ensured to facilitate the passage of the visual optical fiber 7 and the gastrointestinal tube 8.

The tail sheath 623 includes a second spiral elastic skeleton 6231 and a second connecting membrane 6232, the second spiral elastic skeleton 6231 is integrally connected to the first spiral elastic skeleton 6221, in other words, the second spiral elastic skeleton 6231 and the first spiral elastic skeleton 6221 are a spring, so as to ensure the consistency of the middle sheath 622 and the tail sheath 623, and also ensure that the middle sheath 622 and the tail sheath 623 maintain stable shapes in a natural state, and can bend when being subjected to an external force, it is worth mentioning that the first spiral elastic skeleton 6221 and the second spiral elastic skeleton 6231 both have a certain strength, that is, are not too soft, so as to ensure that the sheath body 62 does not get into the stomach of the patient, so as to influence the catheterization operation.

The second connecting membrane 6232 is integrally covered and connected to the second spiral elastic skeleton 6231, so as to ensure the overall sealing performance of the tail section sheath 623, the thickness of the second connecting membrane 6232 is greater than the diameter of the second spiral elastic skeleton 6231, that is, the second spiral elastic skeleton 6231 can be embedded into the second connecting membrane 6232, and the smoothness of the inner wall of the tail section sheath 624 is ensured, so as to facilitate the passage of the visible optical fiber 7 and the gastrointestinal tube 8.

The first connecting membrane 6222 and the second connecting membrane 6232 are integrally formed, that is, the second connecting membrane 6232 extends from the operating portion 61 to the front sheath 621 so as to cover the middle sheath 622 and the tail sheath 623, and is integrally connected to the fixing membrane 6212 so as to ensure the integrity of the sheath main body 62.

The front bending assembly 63 includes a head guiding hose 631 and a head pulling cable 632, the head guiding hose 631 extends from the operation portion 61 to a position where the front sheath 621 is connected to the middle sheath 622, that is, a rear end of the front sheath 621 and a front end of the middle sheath 622, the head guiding hose 631 is disposed longitudinally along an outer wall of the sheath main body 62 and is kept parallel to an axis of the sheath main body 61, and a length of the head guiding hose 631 is equal to a length of the middle sheath 622 plus the rear sheath 623.

The head end guide hoses 631 are fixed to the middle sheath 622 and the tail sheath 623 of the sheath body 62 and can be bent as the middle sheath 622 and the tail sheath 623 are bent, and in this embodiment of the present invention, a pair of head end guide hoses 631 are symmetrically disposed on both sides of the sheath body 62.

The number of the head end guy cables 632 is also two, the head end guy cables 632 are two steel wires with a very small diameter, one end of each of the head end guy cables is fixed on the top end of the front section sheathing body 621, the other end of each of the head end guy cables 632 passes through the head end guide hose 631 and is fixedly connected to the control system of the operation part 61, the head end guy cables 632 are pulled by the control system to bend, the head end guy cables 632 are pulled by the control system to be tightened after being pulled, due to the limitation of the head end hose 631, the head end guy cables 632 will first contract from the front section sheathing body 621, that is, the top ends of the front section sheathing bodies 621 contract towards the tail end direction, and then the annular support frames 6211 are driven to approach each other, so that the sides of the annular support frames 6211 that approach each other bend, and then the bending of the front section sheathing body 621 is completed, and at the head end guy cables 632 on the other side are simultaneously tightened, so that the front section sheathing body 621 can maintain the bending angle, that is, that the front section sheathing body 621 can be fixed at a determined angle, so as to determine the traveling direction of the main body 62.

The anterior segment bending component 63 which is symmetrically arranged can control the anterior segment sheath 621 to bend towards two directions, so that when the actively bendable sheath 6 enters the throat of a patient through the nasal cavity, the visible optical fiber 7 can actively select esophagus to enter, and the success rate of placing the actively bendable sheath 6 is greatly improved.

The middle bending assembly 64 includes a middle guiding tube 641 and a middle pulling cable 642, the middle guiding tube 641 extends from the operation portion 61 to the connection position of the middle sheath 622 and the tail sheath 623, that is, the length of the middle guiding tube 641 is equal to the length of the tail sheath 623.

The number of the middle-section bending assemblies 64 is two, and the two middle-section bending assemblies are symmetrically arranged on two sides of the tail-section sheath 623 respectively, and the middle-section guiding hoses 641 are longitudinally arranged along the outer wall of the tail-section sheath 623, and the arrangement direction of the middle-section guiding hoses 641 is consistent with the axial direction of the sheath main body 62 and is parallel to the axial line of the sheath main body 62.

The middle guiding hose 641 is fixed on the tail sheath 623 and can bend along with the bending of the tail sheath 623, the middle pulling cable 642 is inserted into the middle guiding hose 641, one end of the middle pulling cable 642 is fixed at the connection between the front sheath 621 and the middle sheath 622, and the other end is fixedly connected to the control system of the operation part 61, so that the control system can control the middle pulling cable 642 and further control the bending of the middle sheath 622.

It is worth mentioning that the middle bending component 64 and the front bending component 63 are not collinear, that is, the axis of the front bending component 63 does not coincide with the axis of the middle bending component 64, that is, the bending direction of the front bending component 63 and the bending direction of the middle bending component 64 do not coincide, that is, the sheath main body 62 can be bent in different directions, so as to satisfy the complex environment from the stomach to the intestinal tract.

The middle section pulling cable 642 contracts under the control of the control system of the operation portion 61, and the middle section guiding hose 631 limits the contraction of the middle section pulling cable 642, so that the middle section pulling cable 642 starts to contract at the middle section sheathing body 622, and further drives the first spiral elastic skeleton 6221 to bend, that is, the middle section sheathing body 622 to bend, and the bent first spiral elastic skeleton 6221 can recover to a natural straight state by means of its own elasticity when the middle section pulling cable 642 is released.

The symmetry sets up middle section sheath 622 both sides the crooked subassembly 64 in middle section can help middle section sheath 622 is crooked towards the equidirectional not, cooperates again and goes up two equidirectional of anterior segment sheath 621, with this convenience the crooked route of 6 adaptation stomach bottoms pylorus to duodenum of the flexible sheath of initiatively being able to bend is convenient the sheath 6 of initiatively being able enters into the intestinal environment and carries out work.

The tail bending assembly 65 includes a tail guiding hose 651 and a tail pulling cable 652, the tail guiding hose 651 is fixed on two sides of the tail sheath 623 and is not collinear with the front bending assembly 63 and the middle bending assembly 65, the length of the tail guiding hose 651 is shorter than the length of the tail sheath 623, that is, the tail guiding hose 651 extends from the operating portion 61 to the connecting position of the middle sheath 622 and the tail sheath 623 but does not extend to the connecting position of the middle sheath 622 and the tail sheath 623, and the tail guiding hose 651 can bend along with the bending of the tail sheath 623.

One end of the tail section cable 652 is fixed to the connection position of the middle section sheath 622 and the tail section sheath 623, and the other end thereof penetrates through the tail section guide hose 651 and is fixedly connected to the control system of the operating part 61. The length of the tail cable 652 is changed by the operation of the operation part 61, and since the tail guide hose 651 limits the bending of the tail cable 652, the tail cable 652 starts to bend from a portion without the tail guide hose 651, so that the second spiral elastic skeleton 6231 bends, and the tail sheath 623 is driven to bend, and the second spiral elastic skeleton 6231 of the tail sheath 623 can recover to an original state, that is, a straightened state, by virtue of the elasticity of the second spiral elastic skeleton 6231 after the tail cable 652 is unloaded.

The front section bending component 63, the middle section bending component 64 and the tail section bending component 65 are not collinear, namely the active bendable sheath 6 is provided with three sections, each section is optional in bending in two directions, namely the active bendable sheath 6 can be bent with great freedom and can be flexibly adapted to a path from the fundus to the duodenum, so that the active bendable sheath 6 can be matched with the visible optical fibers 7 to reach the duodenum or jejunum through the fundus pylorus to work, the expansion function of placing the stomach tube through the nose is further expanded, and the stomach tube can enter the intestinal tract to work.

Referring to fig. 5, the tail end of the optical fiber 7 further has a magnetic fixing element 71, the magnetic fixing element 71 can be fixed on the operation portion 61, in other words, when the head end of the optical fiber 7 passes through the active bendable sheath tube 6 and is flush with the head end of the anterior sheath body 621, the magnetic fixing element 71 is magnetically adsorbed on the operation portion 61, so as to ensure that the optical fiber 7 does not move in the sheath body 62, and maintain the head end of the optical fiber 7 at the front end of the sheath body 62, so that the optical fiber 7 can clearly see the visual field in front of the active bendable sheath tube 6 without exceeding the front end of the anterior sheath body 621, thereby effectively avoiding the visual field stability of the optical fiber 7, and helping the active bendable sheath tube 6 select the esophagus to enter when passing through the nasal throat position of the patient, and also helping the active bendable sheath tube 6 pass through the fundus pylorus, and thus helping the active bendable sheath tube 6 enter the predetermined position of the intestinal tract of the patient to work.

Referring to FIG. 6, the gastrointestinal tube 8 includes a main tube 81 and a detachable connector 82, wherein the detachable connector 82 is detachably connected to the main tube 81.

The detachable connector 82 may be a screw to connect with the main tube 81 and ensure the sealing between the main tube 81 and the detachable connector 82, and the detachable connector 82 is used to connect the main tube 81 to an external instrument, such as an aspirator. It should be noted that the diameter of the main tube 81 is uniform from top to bottom, that is, the main tube 81 is a uniform tube with uniform diameter from top to bottom.

The diameter of the main tube 81 is slightly smaller than the active bendable sheath 6, so that the main tube 81 of the gastrointestinal tube 8 can move radially along the inside of the active bendable sheath 6. When the actively bendable sheath 6 enters a predetermined position of the stomach or the intestinal tract, the gastrointestinal tube 8 can work along the actively bendable sheath 6 entering the predetermined position of the stomach or the intestinal tract.

Specially, when intestines and stomach pipe 8 blocks up, pull down intestines and stomach pipe 8 can dismantle connector 82, follow this moment main part pipe 81 is put into the flexible sheath pipe of initiative 6 and can not by can dismantle connector 82 blocks, flexible sheath pipe of initiative 6 is followed main part pipe 81 is placed the predetermined position after, takes out the jam main part pipe 81, follows flexible sheath pipe of initiative 6 is put into newly main part pipe 81 is new main part pipe 81 is placed the predetermined position after, is taken out flexible sheath pipe of initiative 6, will main part pipe 81 connect in can dismantle connector 82, intestines and stomach pipe 8 can work again.

The actively bendable sheath tube 6 further comprises a sliding sheath tube 624, the sliding sheath tube 624 is sleeved on the sheath main body 62, the stomach tube can be conveniently placed on the sheath main body 62 through the nose, and the outer wall of the sliding sheath tube 624 is smooth and is suitable for being in sliding contact with human tissues, so that the discomfort of a patient can be further reduced.

Fig. 7 to 14 are schematic views of a sheath bendable nasogastric tube according to the present invention, the sheath bendable nasogastric tube includes a bendable guiding sheath 10, a visible optical fiber 20 and a nasogastric tube 30, and the bendable guiding sheath 10 and the visible optical fiber 20 are suitable for being used with the nasogastric tube 30.

When the sheath body bendable nasogastric tube is used, the visible optical fiber 20 is placed into the internal channel of the bendable guiding sheath 10 and is adjusted to a proper position, the visible characteristic of the visible optical fiber 20 is utilized to enable the visible optical fiber 20 to be matched with the bendable guiding sheath 10 to visually select the esophagus after passing through the nasal cavity, the visible optical fiber 20 enters a preset position of the stomach through the esophagus, then the visible optical fiber 20 is withdrawn, and the nasogastric tube 30 is placed into the stomach along the internal channel of the bendable guiding sheath 10 to be operated.

When the nasogastric and intestinal tube 30 is clogged in the stomach of the patient, the bendable guiding sheath tube 10 is reinserted along the nasogastric and intestinal tube 30, and then the clogged nasogastric and intestinal tube 30 is withdrawn through the inner channel of the bendable guiding sheath tube 10, and a new nasogastric and intestinal tube 30 is reinserted through the inner channel of the bendable guiding sheath tube 10. When suction treatment of the stomach of the patient is required, it is necessary to reinsert the bendable guiding sheath 10 along the nasogastric-intestinal tube 30, then pull out the nasogastric-intestinal tube 30, insert the visible optical fiber 20 through the internal channel of the bendable guiding sheath 10, and suck and discharge the substance in the stomach through the internal channel of the bendable guiding sheath 10.

Generally, the sheath body bendable nasogastric tube only needs to extend into the stomach, but in some special cases, the sheath body bendable nasogastric tube needs to firstly enter the stomach of a patient and then extend into the duodenum of the patient through the pylorus at the bottom of the stomach to treat the patient.

The pylorus serves as a channel for connecting the stomach and the duodenum, and precisely, the pylorus is not located at the bottom end of the stomach, and the pylorus is located at the side end of the stomach close to the bottom end, so that the gap is formed between the pylorus and the bottom of the stomach, and the section of the channel between the duodenum and the stomach is bent, the bending structure greatly increases the difficulty of operation and the placement of the nasogastrointestinal tube, the conventional nasogastrointestinal tube is a hose, so that the pylorus cannot reach the bottom due to the fact that the pylorus cannot be bent, and the conventional nasogastrointestinal tube cannot reach the pylorus or find the pylorus due to length limitation, material strength and other reasons, so that the pylorus cannot be accurately found and enters the duodenum when the conventional nasogastrointestinal tube is used for treating gastrointestinal diseases, and therefore, a plurality of limiting conditions exist in the process of gastrointestinal diseases of an operator, and the difficulty of the operator is greatly increased when the gastrointestinal disease is treated by the conventional nasogastrointestinal tube.

Compared with the traditional nasal gastrointestinal tube, the sheath bendable nasal gastrointestinal tube is longer in length, so that the sheath bendable nasal gastrointestinal tube can sufficiently extend into duodenum, and the bendable guide sheath 10 and the visible optical fiber 20 are added, so that the front end of the sheath bendable nasal gastrointestinal tube can be passed through the visible optical fiber 20 to find the accurate position of pylorus, and the bendable guide sheath 10 is bent to visually enter the pylorus at an adjustable angle to reach duodenum.

The flexible guiding sheath 10 comprises an operating handle 11, a traction component 12 and a sheath main body 13, wherein the operating handle 11 is connected to the sheath main body 13, and the traction component 12 is respectively arranged on the operating handle 11 and the sheath main body 13. The operating handle 11 is adapted to control the sheath body 13 to perform directional bending through the pulling assembly 12.

The operation handle 11 has an operation opening 114 at one end thereof, the operation opening 114 is located at a central axial line position of one end of the operation handle 11, the operation opening 114 extends perpendicularly from the end surface of the operation handle 11 to the inside of the operation handle 11 and penetrates the operation handle 11 to form an operation passage 113, the operation passage 113 is suitable for the visible optical fiber 20 and the nasogastric tube 30 to pass through when in use, so that the inner diameter or the cross-sectional area of the operation passage 113 is larger than the outer diameter or the cross-sectional area of the visible optical fiber 20 and the nasogastric tube 30.

The side end of the operating handle 11 has a first switch mounting groove 111 and a second switch mounting groove 112, and the first switch mounting groove 111 and the second switch mounting groove 112 extend from the side end of the operating handle 11 to the inside of the operating handle 11 perpendicularly to the side end surface of the operating handle 11 to communicate with the operating passage 113.

The side end of the operating handle 11 further has a mounting hole 116, the mounting hole 116 extends from the side end surface of the operating handle 11 perpendicularly to the inside of the operating handle 11 and is communicated with the operating channel 113, and the inner wall of the mounting hole 116 is provided with an internal thread.

The side end of the operating handle 11 is provided with a fastening piece 115, the side end of the fastening piece 115 is provided with external threads, the fastening piece 115 is suitable for being tightly matched with the internal threads in the mounting hole 116 through the external threads of the side end so as to be connected to the operating handle 11 in a threaded connection mode, and the fastening piece 115 is suitable for being used for fixing.

The bendable guide sheath 10 is adapted to fix the visible optical fiber 20 and the nasogastric tube 30 in the operation channel 113 of the bendable guide sheath 10 by the fastener 115 when the bendable guide sheath 10 is used, and the fastener 115 is moved into the operation channel 113 by screwing the fastener 115 to relatively reduce the inner diameter or cross-sectional area of the operation channel 113 so that the visible optical fiber 20 or the nasogastric tube 30 in the operation channel 113 is fixed to the inner wall of the operation channel 113 by being pressed by the fastener 115 when the fastener 115 is used. When the fastener 115 is rotated to move the fastener 115 outward away from the working channel 113, the inner diameter or cross-sectional area of the working channel 113 is relatively increased and the visible light fiber 20 or the nasogastric tube 30 is released. The sheath body 13 includes a guide tube 131, a bendable tube 132, and an insertion head 133, and the guide tube 131 has one end connected to the operating handle 11 and the other end connected to the bendable tube 132. The bendable tube 132 is connected to the guide tube 131 at one end and to the insertion head 133 at the other end.

The sheath body 13 has a guiding channel 134 therein, the guiding channel 134 penetrates the sheath body 13, and when the sheath body 13 is connected to the operating handle 11, the guiding channel 134 is communicated with the operating channel 113.

The material of the insertion head 133 is preferably flexible to avoid injury or tingling caused by the hard material of the insertion head 133 during the insertion process, and the insertion head 133 completely covers the end of the bendable pipe 132 when the insertion head 133 is connected to the bendable pipe 132 to avoid discomfort to the patient caused by the end of the bendable pipe 132 during the insertion process.

The pulling assembly 12 comprises at least one control member 121 and at least one pulling member 122, the control member 121 optionally comprises a first control member 1211 and a second control member 1212, the first control member 1211 and the second control member 1212 are adapted to be respectively mounted in the first switch mounting groove 111 and the second switch mounting groove 112, and the first control member 1211 and the second control member 1212 are adapted to control the bending of the sheath body 13.

The pulling member 122 optionally includes a first pulling member 1221 and a second pulling member 1222, one end of the first pulling member 1221 and the second pulling member 1222 is connected to the bendable pipe 132 of the sheath body 13, and the other end is connected to the first control member 1211 and the second control member 1212 of the operating handle 11, respectively, and the bendable pipe 132 of the sheath body 13 is sleeved on the outer end of the first pulling member 1221 and the second pulling member 1222.

The bendable pipe 132 is preferably a serpentine pipe, one end of the first pulling member 1221 and the second pulling member 1222 is connected to the inner end of the bendable pipe 132, the first pulling member 1221 and the second pulling member 1222 are respectively connected to opposite sides of the inner wall of the bendable pipe 132 in the bendable pipe 132, and the first pulling member 1221 is parallel to the second pulling member 1222. And the ends of the first pulling member 1221 and the second pulling member 1222 are on the same horizontal line, in other words, the ends of the first pulling member 1221 and the second pulling member 1222 are connected to the same position of the bendable pipe 132 opposite to the inner wall.

The other ends of the first pulling member 1221 and the second pulling member 1222 are respectively connected to the first control member 1211 and the second control member 1212, so that an operator can control the first control member 1211 and the second control member 1212 connected to the first pulling member 1221 and the second pulling member 1222 to make the first pulling member 1221 and the second pulling member 1222 perform two actions of tightening and loosening, thereby driving the bendable pipe 132 to bend in two different directions, and to bend to different degrees by adjusting the degrees of tightening and loosening, thereby bending the front end of the sheath main body 13, thereby driving the visible optical fiber 20 to bend to adjust to a proper angle and a proper visual field, so that the bendable guiding sheath 10 can relatively accurately pass through the pylorus into the duodenum of the patient for treatment.

The sheath body 13 includes a sheath 135, the material of the sheath 135 is preferably flexible, the sheath 135 is sleeved outside the bendable pipe 132, covers the outer end of the bendable pipe 132, and is engaged with the insertion head 133, so that the bendable pipe 132 has relative sealing property, so that the flexible guiding sheath 10 can perform suction and perfusion through the guiding channel 134 alone. The protective sleeve 135 is sleeved on the outside of the bendable pipe 132, so that the problem that the outer wall of the bendable pipe 132 causes discomfort to the patient due to an excessively large bending angle during the bending process of the bendable pipe 132 can be avoided.

In use, the visible optical fiber 20 is inserted into the operation channel 113 and the guiding channel 134 through the operation opening 114, and the front end of the visible optical fiber 20 is located at the opposite front end of the insertion head 133, the first traction unit 121 and the second traction unit 122 are controlled to tighten and loosen by controlling the first control 1211 and the second control 1212, the bendable pipe 132 is further controlled to bend by controlling the first traction unit 121 and the second traction unit 122, so as to drive the visible optical fiber 20 to bend, the visible angle of the visible optical fiber 20 is adjusted, so as to accurately find the position of the pylorus and enter the pylorus, and the front end of the sheath tube main body 13 can reach the position of the duodenum by continuously adjusting the bending angle and the bending direction of the bendable pipe 132 in cooperation with the visible optical fiber 20.

The visual fiber 20 comprises a visual unit 21 and a fiber body 22, the visual unit 21 is disposed at one end of the fiber body 22, the end where the visual unit 21 is located is the front end of the visual fiber 20, and when in use, the front end of the visual fiber 20 is inserted into the operation channel 113 and the guide channel 134 through the operation port 114 of the operation handle 11, so that the visual unit 21 is located at the opposite front end of the insertion head 133 to cooperate with the sheath tube body 13 to visually enter the duodenum of the patient.

The flexible introducer sheath 10 is adapted to fix the rear end of the visual fiber 20 in the operation channel 113 of the operation handle 11 by the fastening member 115 when in use, so that the visual unit 21 of the visual fiber 20 can be always held at the front end of the insertion head 113 of the flexible introducer sheath 10 without relative movement, thereby providing a clearer view for the insertion and treatment operation of the flexible introducer sheath 10. The front end of the visible optical fiber 20 is located inside a patient, operability is small, uncertain factors are more, the visible optical fiber 20 is fixed at the rear end, operability is stronger in the mode that the rear end is fixed compared with the mode that the front end is fixed, uncertain factors are smaller, controllability is larger, and fixation is more convenient.

In addition, the bendable guide sheath 10 is adapted to fix the rear end of the nasogastric-intestinal tube 30 in the operation channel 113 of the operation handle 11 by the fastener 115, so that the nasogastric-intestinal tube 30 can be fixed in the guide channel 134 of the bendable guide sheath 10 without relative movement, and the insertion length of the nasogastric-intestinal tube 30 can be adjusted and fixed at any time, and the position of the nasogastric-intestinal tube 30 in the human body can be better adjusted, so that the operator can better treat the patient. The nose gastrointestinal tube 30 is through passing through the fastener 115 is fixed, and then can adjust the length of putting into of nose gastrointestinal tube 30, makes nose gastrointestinal tube 30 when using, and the suitability greatly increased is difficult to be restricted by product specification and unable the use, and is shorter in length when the nose gastrointestinal tube 30 is in short supply, length is longer the nose gastrointestinal tube 30 also can use, has increased to a certain extent the suitability of nose gastrointestinal tube 30.

The nasal gastrointestinal tube 30 is fixed in the bendable guide sheath 10, and when nutrient solution is conveyed, the nasal gastrointestinal tube 30 cannot move relatively, so that the nutrient solution can be conveyed more easily and conveniently, an operator does not need to manually adjust the position, and the operation time is greatly saved.

The visual unit 21 is preferably an electronic mirror, because the electronic mirror has a smaller volume and higher definition, one end of the optical fiber main body 22 is connected to the visual unit 21, and the other end is connected to the imaging device, the optical fiber main body 22 is adapted to transmit the picture captured by the visual unit 21 to the imaging device, so as to present the real-time situation in the intestines and stomach of the patient to the operator through the imaging device, so that the operator can conveniently make the most favorable choice for the patient in real time, and take more effective measures to treat the patient.

The nasogastrointestinal tube 30 comprises a nasogastrointestinal tube connecting seat 32, a tube body 33, a connecting belt 34 and a backflow plug 35, wherein the nasogastrointestinal tube connecting seat 32 is connected to one end of the tube body 33 through threads, one end of the connecting belt 34 is connected to the nasogastrointestinal tube connecting seat 32, and the other end of the connecting belt is connected to the backflow plug 35.

The nasogastric-intestinal tube 30 is internally provided with a flow channel 31, the flow channel 31 penetrates through the nasogastric-intestinal tube 30, when in use, the visible optical fiber 20 is firstly inserted into the flexible guide sheath 10, enters the stomach and duodenum of a patient from the esophagus after passing through the nose, and is inserted into the nasogastric-intestinal tube 30 from the operation port 114 after withdrawing the visible optical fiber 20, so as to carry out nutrient solution delivery and other operations on the patient.

The naso-gastrointestinal tube connecting seat 32 further comprises an open end 321 and a connecting end 322, the end of the open end 321 is provided with an opening 3211, the opening 3211 is communicated with the flow channel 31, when in use, the naso-gastrointestinal tube connecting seat is suitable for placing nutrient solution into the naso-gastrointestinal tube 30 through the opening 3211, after the nutrient solution placed through the opening 3211 enters the flow channel 31, the nutrient solution enters the intestines and stomach of the patient along the flow channel 31 inside the naso-gastrointestinal tube 30, so that the patient has enough nutrient supply.

The connecting end 322 of the naso-gastric tube connecting seat 32 is adapted to be connected to the tube body 33, the connecting end 322 further has an insertion groove 3221, the insertion groove 3221 is communicated with the flow channel 31, and the insertion groove 3221 is adapted to receive an end portion of the tube body 33, so that the naso-gastric tube connecting seat 32 can be detachably connected to the tube body 33.

One end of the connecting band 34 is connected to the side end of the naso-gastrointestinal tube connecting seat 32, and is close to the position of the opening end 321, and the other end is connected to the backflow plug 35. The return plug 35 is adapted to block the opening 321. In use, after an operator places nutrient solution into the stomach and intestine of a patient through the opening 3211 of the naso-gastric tube 30, in order to prevent the nutrient solution from flowing back through the flow channel 31 of the naso-gastric tube 30, the opening 3211 is blocked by the backflow plug 35, so as to prevent the naso-gastric tube 30 from flowing back the nutrient solution for some reason when left in place.

When the bendable nasogastric tube of the sheath body is used, the nasogastric tube 30 may be blocked, and when the nasogastric tube 30 is blocked in a patient, the blocked nasogastric tube 30 needs to be drawn out and then a new nasogastric tube 30 is placed. When the blocked nasogastric tube 30 is withdrawn, the bendable guiding sheath 10 is inserted into the patient along the blocked nasogastric tube 30, and then the blocked nasogastric tube 30 is withdrawn, and after the insertion of the bendable guiding sheath 10 is completed, a new nasogastric tube 30 is inserted through the guiding channel 134 inside the bendable guiding sheath 10. Therefore, when the nasogastric and intestinal tube 30 is replaced, the flexible guide sheath 10 can be inserted into the stomach of the patient along the blocked nasogastric and intestinal tube 30 through the internal guide channel 134, and when the insertion is performed, because the nasogastric and intestinal tube connecting seat 32 of the nasogastric and intestinal tube 30 has a large volume and cannot pass through the guide channel 134, the nasogastric and intestinal tube connecting seat 32 needs to be separated from the tube body 33, so that the guide channel 134 of the flexible guide sheath 10 can be inserted into the stomach of the patient along the blocked nasogastric and intestinal tube 30 through the outer end of the tube body 33, and after the insertion is completed, the tube body 33 of the blocked nasogastric and intestinal tube 30 is drawn out from the operation port 114 and is inserted into a new nasogastric and intestinal tube 30 through the operation port. The nasogastric tube 30 and the visible optical fiber 20 in the sheath bendable nasogastric tube share the guide channel 134 and the operation channel 113, and the inner diameter or the cross-sectional area of the operation channel 113 and the guide channel 134 is larger than the outer diameter or the cross-sectional area of the nasogastric tube 30 and the visible optical fiber 20, so that the nasogastric tube 30 and the visible optical fiber 20 can be smoothly inserted into the operation channel 113 and the guide channel 134 and can be easily taken out.

When the flexible guide sheath is used, substances in the stomach of a patient need to be discharged, the blocked intestines and stomach of the patient need to be cleaned, and the stomach of the patient needs to be cleaned, the visible optical fiber 20 is matched with the flexible guide sheath 10 for use, the discharging, the cleaning and the dredging are all carried out in the internal channel of the flexible guide sheath 10, compared with the traditional method that all operations are carried out in the flow channel 31 in the nasogastric-intestinal tube 30, the internal diameter or the cross-sectional area of the guide channel 134 in the flexible guide sheath 10 is larger, the operation is smoother, the blockage is not easy to occur, and in the operation process, the operation can be carried out under the condition that the visible optical fiber 20 is inserted, the real-time situation in the intestines and the stomach of the patient can be observed conveniently, so that an operator can take more effective measures to treat the patient.

Most of the conventional nasogastric and intestinal tubes 30 are disposable tubes, all operations are basically performed in the nasogastric and intestinal tube 30, and when a blockage occurs or the tube is used up, the tube is directly replaced with a new nasogastric and intestinal tube 30, and since there is no visibility, a lot of the nasogastric and intestinal tube 30 is wasted during blind insertion, and thus the use cost is high. However, the flexible sheath nasogastric tube generally adopts the through channel 31 inside the nasogastric tube 30 only when nutrient solution is needed to be delivered to the patient, most of the operation can be performed in the guide channel 134 and the operation channel 113 of the flexible guide sheath 10, and the flexible guide sheath 10 of the flexible sheath nasogastric tube can be repeatedly used after being cleaned and sterilized, so that the use of the nasogastric tube 30 is reduced, the use cost of the nasogastric tube 30 is reduced, the flexible sheath is visually inserted when being inserted, the waste of the nasogastric tube 30 is further reduced, and some damage to the patient caused by blind insertion of the nasogastric tube 30 is avoided.

Fig. 15 is a schematic view of a sheath bendable nasogastric tube according to a second embodiment of the present invention, the sheath bendable nasogastric tube includes a bendable guiding sheath 10A, a visible optical fiber 20A and a nasogastric tube 30A, and the bendable guiding sheath 10A and the visible optical fiber 20A are suitable for cooperating with the nasogastric tube 30A.

The second embodiment is similar in structure to the first embodiment except that the tow assembly 12A is not located in the same position.

The sheath main body 13A includes a guiding tube 131A, a bendable tube 132A and an insertion head 133A, one end of the guiding tube 131A is connected to the operating handle 11A, and the other end is connected to the bendable tube 132A. One end of the bendable tube 132A is connected to the guide tube 131A, and the other end is connected to the insertion head 133A.

The sheath main body 13A has a guiding channel 134A therein, the guiding channel 134A penetrates through the sheath main body 13A, and when the sheath main body 13A is connected with the operating handle 11A, the guiding channel 134A is communicated with the operating channel 113A.

The pulling assembly 12A further includes a first pulling member 1221A and a second pulling member 1222A, one end of the first pulling member 1221A and the second pulling member 1222A is connected to the bendable tube 132A of the sheath body 13A, the other end is connected to the first control member 1211A and the second control member 1212A of the operating handle 11A, respectively, and the bendable tube 132A of the sheath body 13A is sleeved on the outer end of the first pulling member 1221A and the second pulling member 1222A.

The bendable pipe 132A is preferably a snake bone pipe, one ends of the first and

second tractors

1221A and 1222A are connected to the bendable pipe 132A, the first and

second tractors

1221A and 1222A are connected to opposite sides of the inner wall of the bendable pipe 132A inside the bendable pipe 132A, respectively, and the first tractors 1221A are located at opposite front ends of the second tractors 1222A.

In other words, the ends of the first pulling member 1221A and the second pulling member 1222A are connected to different positions of the bendable pipe 132A with respect to the inner wall, the first pulling member 1221A is connected to a position relatively forward of the bendable pipe 132A, the second pulling member 1222A is connected to a position relatively rearward of the bendable pipe 132A, and the first pulling member 1221A and the second pulling member 1222A are connected with a space in the same direction. By connecting the first pulling member 1221A and the second pulling member 1222A to different positions of the inner wall of the bendable pipe 132A, the bendable pipe 132A can be adjusted in two directions at the same time, and the bendable pipe 132A is bent at different positions, so that the bendable pipe 132A is more flexible to adjust, more adaptive, and more convenient to operate.

The other ends of the first pulling member 1221A and the second pulling member 1222A are connected to the first control member 1211A and the second control member 1212A, respectively, so that an operator can control the first control member 1211A and the second control member 1212A connected to the first pulling member 1221A and the second pulling member 1222A to cause the first pulling member 1221A and the second pulling member 1222A to perform two actions of tightening and loosening, thereby driving the bendable tube 132A to perform bending in two different directions, different degrees and different positions by adjusting the degrees of tightening and loosening, thereby bending the front bending end of the sheath tube main body 13A, thereby driving the visible optical fiber 20A to bend to adjust to a proper angle and a proper visual field, so that the bendable guiding sheath 10A can enter the duodenum of a patient relatively accurately through the pylorus.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. An actively bendable sheath, comprising:

an operation part;

the sheath main body comprises a front section sheath body, a middle section sheath body and a tail section sheath body, the front section sheath body, the middle section sheath body and the tail section sheath body are sequentially connected, and the tail section sheath body is connected to the operating part;

the front-section bending assembly comprises at least one head end guide hose and a head end inhaul cable, the head end guide hose extends from the operating part to the connecting position of the front-section sheath body and the middle-section sheath body, the head end inhaul cable penetrates through the head end guide hose, one end of the head end inhaul cable is connected to the operating part, the other end of the head end inhaul cable is fixed at the top end of the front-section sheath body, and the operating part is suitable for controlling the head end inhaul cable to bend the front-section sheath body;

a crooked subassembly of back end, the crooked subassembly of back end includes an at least back end guide hose and a back end cable, back end guide hose one end is fixed in operation portion, the other end to the middle section sheath body with back end sheath body hookup location extends predetermined distance, the back end cable is worn to locate the back end guide hose, back end cable one end is fixed in the middle section sheath body with back end sheath body hookup location, the other end connect in operation portion, operation portion is suitable for control the back end cable makes the body of back end sheath is crooked, the crooked subassembly of anterior segment with the crooked subassembly of middle section and the crooked subassembly of back end is not the collineation of each other.

2. The active bendable sheath of claim 1, wherein the two front bending elements are symmetrically disposed on two sides of the outer wall of the sheath body, the two middle bending elements are symmetrically disposed on two sides of the outer wall of the sheath body, and the two tail bending elements are symmetrically disposed on two sides of the outer wall of the sheath body.

3. The actively bendable sheath of claim 1 or 2, wherein the sheath body further comprises a sliding sheath, the sliding sheath being sleeved with the sheath body.

4. The actively bendable sheath of claim 1 or 2, wherein the anterior sheath comprises a plurality of annular supporting frames and a fixing film, the fixing film is coated on the annular supporting frames, and the plurality of annular supporting frames are coaxially spaced from each other and support the fixing film to form a channel.

5. The actively bendable sheath of claim 1 or 2, wherein the middle sheath comprises a first helical elastic skeleton and a first connecting membrane, the first connecting membrane wrapping the first helical elastic skeleton.

6. The actively bendable sheath of claim 1 or 2, wherein the tail sheath comprises a second helical elastic skeleton and a second connecting membrane, the second connecting membrane is wrapped around the second helical elastic skeleton.

7. A sheath flexible type nose stomach intestines pipe, its characterized in that includes:

an actively bendable sheath comprising an operating portion, a sheath body, a front section bending member, a middle section bending member and a tail section bending member, the sheath body comprising a front section sheath body, a middle section sheath body and a tail section sheath body, the front section sheath body and the middle section sheath body and the tail section sheath body being connected in series, the tail section sheath body being connected to the operating portion, the front section bending member comprising at least a head end guide hose and a head end cable, the head end guide hose extending from the operating portion to the front section sheath body and the middle section sheath body connection position, the head end cable being threaded to the head end guide hose, the head end being connected to the operating portion at one end thereof and the other end being fixed to the front section sheath body top end, the operating portion being adapted to control the head end cable to bend the front section sheath body, the middle section bending member comprising at least a middle section guide hose and a middle section cable, the middle section guide hose extending from the operating portion to the middle section sheath body and the tail section sheath body connection position, the tail section bending member being adapted to control the tail section bending member, the tail section bending member being connected to the tail section sheath body connection position, the tail section bending member being adapted to control the tail section and the tail section connection position, the other end of the tail section sheath is connected to the operating part, the operating part is suitable for controlling the tail section guy cable to enable the tail section sheath to be bent, and the front section bending component, the middle section bending component and the tail section bending component are not collinear with each other;

the visible optical fiber is suitable for penetrating through the active bendable sheath; and

a gastrointestinal tube, the gastrointestinal tube is suitable for being arranged through the active bendable sheath.

8. The sheath bendable nasogastrointestinal tube of claim 7, wherein the visible fiber has a magnetic fixing member at its end, and the magnetic fixing member is adapted to be magnetically fixed to the operating portion when the visible fiber is flush with the sheath.

9. A sheath bendable nasogastric tube, comprising:

the flexible guide sheath comprises an operating handle, a traction assembly and a sheath tube main body, and a guide channel is formed in the sheath tube main body; the sheath tube main body comprises a guide tube and a bendable tube, one end of the guide tube is connected to the operating handle, and the other end of the guide tube is connected to the bendable tube; the traction assembly further comprises at least one control member and at least one traction member, the control member being disposed on the operating handle; one end of the traction part is connected with the control part, and the other end of the traction part is connected with the bendable pipe, so that the traction part is further controlled by controlling the control part to drive the bendable pipe to bend; the side end of the operating handle is also provided with a fastener, and the fastener extends from the outer end of the operating handle to the inside of the operating handle;

a visual optical fiber, one end of which is provided with a visual unit, and the other end of which is suitable for being fixed on the operating handle through the fastener, so that the visual unit is kept at the front end of the sheath main body after passing through the guide channel to provide a visual field; and

the nasal and gastrointestinal tube comprises a tube body and a nasal and gastrointestinal tube connecting seat, and the nasal and gastrointestinal tube connecting seat is detachably connected with the tube body; the bendable guide sheath is sleeved at the outer end of the nasogastric tube; the naso-gastric tube has a flow channel therein, and is adapted to be placed inside the body of a patient through the guide channel.

10. The sheath bendable nasogastrointestinal tube of claim 9, wherein the sheath body comprises an insertion head, one end of the bendable tube being connected to the guide tube and the other end being connected to the insertion head.

11. The sheath bendable nasogastrointestinal tube of claim 9, wherein the sheath body further comprises a protective sheath, the protective sheath being sleeved on the outer end of the bendable tube.

12. The sheath bendable nasal gastrointestinal tube of claim 10, wherein the sheath is adapted to be connected to the sheath body, wherein the operating handle has an operating port disposed at one end of the operating handle.

13. The sheath bendable nasogastrointestinal tube of claim 12, wherein the operation port extends inwardly of the operation handle to form an operation channel, the operation channel being communicated with the guide channel.

14. The sheath bendable nasal gastrointestinal tube of claim 13, wherein the operating handle further has a first switch mounting groove and a second switch mounting groove, the first switch mounting groove and the second switch mounting groove being located at lateral ends of the operating handle, wherein the control member further comprises a first control member and a second control member, the first control member and the second control member being mounted to the first switch mounting groove and the second switch mounting groove, respectively.

15. The sheath bendable nasal gastrointestinal tube of claim 14 wherein the pulling member further comprises a first pulling member and a second pulling member, one end of the first pulling member and the second pulling member being connected to the first control member and the second control member, respectively, and the other end being connected to the bendable tube opposing inner wall, wherein one end of the first pulling member and the second pulling member being connected to the first control member and the second control member, respectively, the other end of the first pulling member being connected to the bendable tube inner wall at a position near the distal end, and the other end of the second pulling member being connected to the middle portion away from the bendable tube inner wall.