Noninvasive magnetic navigation jejunum feeding tube and noninvasive magnetic navigation jejunum feeding tube system

Abstract

The invention relates to the field of medical auxiliary instruments, in particular to a noninvasive magnetic navigation jejunum feeding tube and a noninvasive magnetic navigation jejunum feeding tube system. A navigation tube of the noninvasive magnetic navigation jejunum feeding tube is arranged in the jejunum feeding tube and can move relative to the jejunum feeding tube in the axis direction of the jejunum feeding tube. The endoscopic probe is arranged at the far end of the navigation tube; the magnetic fluid leading-in pipe is arranged in the navigation pipe, can move relative to the navigation pipe in the axis direction of the navigation pipe and is used for leading in magnetic fluid to the far end of the navigation pipe; wherein the magnetic fluid located at the far end of the navigation tube is used for forming a magnetic navigation segment, and the magnetic navigation segment is used for conducting magnetic induction with an external navigation magnetic field so as to guide the far end of the jejunum feeding tube to move. The non-invasive magnetic navigation jejunum feeding tube is applied to a non-invasive magnetic navigation jejunum feeding tube system, the implantation operation of the jejunum feeding tube can be simplified, the implantation success rate of the jejunum feeding tube is increased, the operation period is shortened, and then discomfort of a patient can be relieved.

Description

Technical Field

[0001] The present invention relates to the field of medical auxiliary equipment, and in particular to a non-invasive magnetic navigation jejunal feeding tube and a non-invasive magnetic navigation jejunal feeding tube system. Background Art

[0002] At present, the introduction of jejunal feeding tubes is difficult, especially in the segmented path from the stomach to the pylorus, which requires a high level of skill from the operator. This results in a lower success rate than other methods, a longer operation time, and an impact on clinical work, as well as discomfort to patients. Summary of the invention

[0003] The purpose of the present invention includes providing a non-invasive magnetic navigation jejunal feeding tube and a non-invasive magnetic navigation jejunal feeding tube system, which can simplify the insertion operation of the jejunal feeding tube, improve its insertion success rate, shorten the operation cycle, and thus reduce the patient's discomfort.

[0004] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a non-invasive magnetic navigation jejunal feeding tube, which comprises a jejunal feeding tube, a navigation tube, an endoscopic probe and a magnetic fluid introduction tube; The distal end of the jejunal feeding tube is configured with an opening; The navigation tube is arranged in the jejunal feeding tube and can move relative to the jejunal feeding tube along the axis direction of the jejunal feeding tube; the endoscopic probe is arranged at the distal end of the navigation tube and is used to close the opening while abutting against the opening and to collect images outside the distal end of the jejunal feeding tube; The magnetic fluid introduction tube is arranged in the navigation tube and can move relative to the navigation tube along the axial direction of the navigation tube. The magnetic fluid introduction tube is used to introduce the magnetic fluid into the distal end of the navigation tube. The magnetic fluid at the distal end of the navigation tube is used to form a magnetic navigation segment, and the magnetic navigation segment is used for magnetic induction with an external navigation magnetic field to guide the distal movement of the jejunal feeding tube.

[0005] In an optional embodiment, the cable of the endoscopic probe is led out from the proximal end of the navigation tube.

[0006] In an optional embodiment, a partition diaphragm is disposed in the navigation tube, the partition diaphragm is spaced from the navigation tube, and a magnetic fluid preset accommodating section is formed in the area between the partition diaphragm and the navigation tube.

[0007] In an optional embodiment, the partition membrane is provided with holes for the cables of the endoscope probe and the magnetic fluid introduction tube to pass through; The magnetic fluid introduction tube can move relative to the partition diaphragm along the axial direction of the navigation tube.

[0008] In an optional embodiment, a magnetic navigation segment, an isolation segment and a magnetic stabilization segment are sequentially arranged in the navigation tube along its axial direction; The magnetic navigation segment and the magnetic stabilization segment are both filled with magnetic fluid, and the isolation segment is filled with non-magnetic liquid that does not mix with the magnetic fluid.

[0009] In an optional embodiment, the magnetic fluid introduction tube is used to communicate with an external fluid injection tube to introduce magnetic fluid into the magnetic navigation segment and the magnetic stabilization segment, and to introduce non-magnetic liquid into the isolation segment.

[0010] In a second aspect, the present invention provides a non-invasive magnetic navigation jejunal feeding tube system, the non-invasive magnetic navigation jejunal feeding tube system comprising a main frame, a magnetic navigation unit and the non-invasive magnetic navigation jejunal feeding tube; The magnetic navigation unit is connected to the main frame, and is used to generate a navigation magnetic field to guide the distal end movement of the jejunal feeding tube.

[0011] In an optional embodiment, the main frame includes a fixed frame, a track, a slider and a sliding frame; The fixed frame is used to be fixed to the bed body; the track is connected to the fixed frame; the slider is slidably matched with the track; the sliding frame is connected to the slider; Wherein, the magnetic navigation unit is connected to the sliding frame.

[0012] In an optional embodiment, a movable block is movably provided on the sliding frame, and the magnetic navigation unit is connected to the movable block.

[0013] In an optional embodiment, the non-invasive magnetic navigation jejunal feeding tube system comprises a plurality of magnetic navigation units; The main frame is equipped with a plurality of sliders and a plurality of sliding frames, and each sliding frame is correspondingly connected to a slider; Each magnetic navigation unit is correspondingly connected to a movable block on a sliding frame; Among them, the magnetic navigation segment and the magnetic stabilization segment each correspond to the magnetic induction of a magnetic navigation unit.

[0014] The non-invasive magnetic navigation jejunal feeding tube and the non-invasive magnetic navigation jejunal feeding tube system provided by the embodiments of the present invention have the following beneficial effects: The non-invasive magnetic navigation jejunal feeding tube includes a jejunal feeding tube, a navigation tube, an endoscopic probe and a magnetic fluid introduction tube; the distal end of the jejunal feeding tube is provided with an opening; the navigation tube is provided in the jejunal feeding tube and can move relative to the jejunal feeding tube along the axis direction of the jejunal feeding tube; the endoscopic probe is provided at the distal end of the navigation tube and is used to close the opening and collect images outside the distal end of the jejunal feeding tube while being abutted against the opening; the magnetic fluid introduction tube is provided in the navigation tube and can move relative to the navigation tube along the axis direction of the navigation tube, and the magnetic fluid introduction tube is used to introduce magnetic fluid into the distal end of the navigation tube; wherein the magnetic fluid at the distal end of the navigation tube is used to form a magnetic navigation segment, and the magnetic navigation segment is used to magnetically sense with an external navigation magnetic field to guide the distal end movement of the jejunal feeding tube. The non-invasive magnetic navigation jejunal feeding tube is applied to a non-invasive magnetic navigation jejunal feeding tube system, which can simplify the insertion operation of the jejunal feeding tube, improve its insertion success rate, shorten the operation cycle, and thus alleviate the discomfort of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of the non-invasive magnetic navigation jejunal feeding tube provided in this embodiment; Figure 2 A cross-sectional view of the non-invasive magnetic navigation jejunal feeding tube provided in this embodiment; Figure 3 A schematic diagram of the configuration of the magnetic navigation segment provided in this embodiment; Figure 4 A schematic diagram of the arrangement of the magnetic navigation segment and the partition membrane provided in this embodiment; Figure 5 A schematic diagram of the arrangement of the magnetic navigation segment, the isolation segment and the magnetic stabilization segment provided in this embodiment; Figure 6 A schematic diagram of the structure of the non-invasive magnetic navigation jejunal feeding tube system provided in this embodiment from a first perspective; Figure 7 This is a schematic structural diagram of the non-invasive magnetic navigation jejunal feeding tube system provided in this embodiment from a second perspective.

[0017] Icons: 100-non-invasive magnetic navigation jejunal feeding tube; 110-jejunal feeding tube; 120-navigation tube; 130-endoscopic probe; 140-magnetic fluid introduction tube; 111-opening; 101-magnetic fluid; 102-magnetic navigation segment; 121-partition membrane; 103-isolation segment; 104-magnetic stabilization segment; 105-non-magnetic liquid; 200-non-invasive magnetic navigation jejunal feeding tube system; 210-main frame; 220-magnetic navigation unit; 211-fixed frame; 212-track; 213-slider; 214-sliding frame; 215-movable block. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0023] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0024] Please refer to Figure 1-Figure 4The present embodiment provides a non-invasive magnetic navigation jejunal feeding tube 100, which includes a jejunal feeding tube 110, a navigation tube 120, an endoscopic probe 130, and a magnetic fluid introduction tube 140; The distal end of the jejunal feeding tube 110 is configured with an opening 111; The navigation tube 120 is disposed in the jejunal feeding tube 110 and can move relative to the jejunal feeding tube 110 along the axial direction of the jejunal feeding tube 110; the endoscopic probe 130 is disposed at the distal end of the navigation tube 120 and is used to close the opening 111 and collect images outside the distal end of the jejunal feeding tube 110 when it is abutted against the opening 111; The magnetic fluid introduction tube 140 is disposed in the navigation tube 120 and can move relative to the navigation tube 120 along the axial direction of the navigation tube 120. The magnetic fluid introduction tube 140 is used to introduce the magnetic fluid 101 to the distal end of the navigation tube 120. The magnetic fluid 101 located at the distal end of the navigation tube 120 is used to form a magnetic navigation segment 102 , and the magnetic navigation segment 102 is used for magnetic induction with an external navigation magnetic field to guide the distal movement of the jejunal feeding tube 110 .

[0025] It should be noted that, in the present embodiment, the success rate of the insertion of the jejunal feeding tube 110 is improved by using the endoscopic probe 130 for image acquisition and visual guidance. On this basis, ultrasound technology can also be used for guidance, that is, an ultrasound probe can be configured at the distal end of the navigation tube 120. On this basis, in order to reduce the influence of the induction magnet of the magnetic navigation on the endoscopic probe 130 or the ultrasound probe, the magnetic fluid 101 is used as the induction magnet at the distal end of the navigation tube 120 to reduce the influence on the endoscopic probe 130 or the ultrasound probe.

[0026] Please refer to Figure 1-Figure 4 The working principle of the non-invasive magnetic navigation jejunal feeding tube 100 is: The non-invasive magnetic navigation jejunal feeding tube 100 is applied to the non-invasive magnetic navigation jejunal feeding tube system 200, and its purpose is to guide the insertion of the jejunal feeding tube 110 on the basis of magnetic navigation, thereby improving its insertion success rate and operation efficiency; Specifically, the navigation tube 120 of the non-invasive magnetic navigation jejunal feeding tube 100 is disposed in the jejunal feeding tube 110 and can move relative to the jejunal feeding tube 110 along the axial direction of the jejunal feeding tube 110; thus, during use, the position of the peep head at the distal end of the navigation tube 120 can be adjusted by the movement of the navigation tube 120 relative to the jejunal feeding tube 110, so that the opening 111 is closed when the navigation tube 120 is abutted against the opening 111, and an image outside the distal end of the jejunal feeding tube 110 is collected, so that the insertion direction and path can be selected based on the collected image data, so as to facilitate the insertion operation; It should be noted that, since the navigation tube 120 can move relative to the jejunal feeding tube 110 along the axial direction of the jejunal feeding tube 110, the opening 111 at the distal end of the jejunal feeding tube 110 can be opened by adjusting the position of the navigation tube 120, so as to facilitate the injection or extraction of gas and liquid at the distal end of the jejunal feeding tube 110; and the outer diameter of the navigation tube 120 is smaller than the inner diameter of the jejunal feeding tube 110, so that a channel for gas and liquid to flow can be formed between the two; The magnetic fluid introduction tube 140 is arranged in the navigation tube 120 and can move relative to the navigation tube 120 along the axial direction of the navigation tube 120. The magnetic fluid introduction tube 140 is used to introduce the magnetic fluid 101 to the distal end of the navigation tube 120. Thus, in this way, the magnetic fluid introduction tube 140 can be moved relative to the navigation tube 120 so that the magnetic fluid 101 can be introduced to the distal end of the navigation tube 120 through the magnetic fluid introduction tube 140, thereby forming a magnetic navigation segment 102, and the magnetic navigation segment 102 can be magnetically induced by the external navigation magnetic field to guide the distal end movement of the jejunal feeding tube 110. In this process, the movement of the magnetic fluid introduction tube 140 along the axial direction of the navigation tube 120 can be improved, and the position of the magnetic fluid introduction tube 140 can be adjusted, and then the magnetic induction capacity can be adjusted according to the injection amount of the magnetic fluid 101, that is, the amount of magnetic fluid 101 in the magnetic navigation segment 102 and its length along the axial direction of the navigation tube 120 are adjusted, thereby adjusting its magnetic navigation strength. It should be noted that, in order to prevent the magnetic fluid 101 at the distal end of the navigation tube 120 from changing its position or flowing toward the proximal end of the navigation tube 120, which may cause a change in magnetic induction capability, gas and liquid that are not mixed with the magnetic fluid 101 may be pre-injected into the navigation tube 120, so as to maintain the position of the magnetic fluid 101 introduced into the distal end of the navigation tube 120 through the magnetic fluid introduction tube 140, that is, to improve the stability of the magnetic navigation segment 102; In summary, the noninvasive magnetic navigation jejunal feeding tube 100 is applied to the noninvasive magnetic navigation jejunal feeding tube system 200, which can simplify the insertion operation of the jejunal feeding tube 110, improve its insertion success rate, shorten the operation cycle, and thus reduce the patient's discomfort; in addition, the application of the magnetic fluid 101 can reduce the impact on the endoscopic probe 130, which is beneficial to improve the imaging stability.

[0027] It should be noted that after the insertion, the magnetic fluid introduction tube 140 , the endoscopic probe 130 and the navigation tube 120 can be withdrawn from the proximal section of the jejunal feeding tube 110 .

[0028] In this embodiment, the components of the magnetic fluid 101 mainly include the following parts: Magnetic particles: The magnetic particles in the magnetic fluid 101 are also called dispersed phases, which are ferromagnetic and have a size of about 10 nanometers. These particles are the main source of the magnetism of the magnetic fluid 101. Commonly used magnetic particle materials include Fe3O4 (magnetite), γ-Fe2O3 (hematite), Ni, Co and their alloys; Base liquid (carrier liquid): The base liquid of the magnetic fluid 101 can be water, organic solvents or oil. The function of the base liquid is to make the magnetic fluid 101 have good fluidity and serve as a carrier of magnetic particles; Surfactant: In order to prevent the aggregation and precipitation of magnetic particles, it is necessary to add surfactants to the magnetic fluid 101; Surfactants usually have amphiphilic properties, one end is polar and the other end is non-polar, which can adapt to certain carrier liquid properties, prevent the aggregation of magnetic particles, and keep the magnetic fluid 101 stable; Other additives: In some cases, in order to improve the stability of the magnetic fluid 101 or improve its performance, other additives may be added, such as substances used to improve the rheological properties of the magnetic fluid 101 or improve its chemical stability.

[0029] The combined effect of these components makes the magnetic fluid 101 have no magnetic attraction in static state, but exhibits magnetism under the action of an external magnetic field, with the characteristics of fast magnetic response, reversible viscosity change, and adjustable thermal and optical properties. Such characteristics of magnetic fluid 101 make it have important application prospects in the fields of optical modulation, optical switch, optical isolator and sensor.

[0030] For further information, please refer to Figure 1-Figure 4 In this embodiment, the cable of the endoscope probe 130 is led out from the proximal end of the navigation tube 120. In order to facilitate the molding of the magnetic navigation segment 102 and prevent it from flowing to its proximal end, a partition diaphragm 121 is arranged in the navigation tube 120. The partition diaphragm 121 is separated from the navigation tube 120, and a preset accommodation section for the magnetic fluid 101 is formed in the area separated from the partition diaphragm 121 and the navigation tube 120. In addition, the partition diaphragm 121 is provided with a hole for the cable of the endoscope probe 130 and the magnetic fluid introduction tube 140 to pass through; wherein, the magnetic fluid introduction tube 140 can move relative to the partition diaphragm 121 along the axial direction of the navigation tube 120.

[0031] Thus, the magnetic fluid 101 can be introduced into the preset accommodation section of the magnetic fluid 101 through the magnetic fluid introduction tube 140 to form the magnetic navigation segment 102, and the magnetic fluid 101 in the magnetic navigation segment 102 can be prevented from flowing to the area outside the preset accommodation section of the magnetic fluid 101 under the action of the isolation diaphragm 121, thereby improving the stability of the magnetic navigation segment 102. It should be noted that, in the case where the isolation diaphragm 121 is configured, if the introduction of the magnetic fluid 101 outside the preset accommodation section of the magnetic fluid 101 is not considered, the gas and liquid that are not mixed with the magnetic fluid 101 may not be pre-injected into the navigation tube 120.

[0032] For further information, please refer to Figure 1-Figure 5 In this embodiment, based on the above structure, in order to improve the success rate of insertion of the jejunal feeding tube 110, a magnetic navigation segment 102, an isolation segment 103 and a magnetic stabilization segment 104 are sequentially arranged in the navigation tube 120 along its axial direction; The magnetic navigation segment 102 and the magnetic stabilization segment 104 both contain magnetic fluid 101 , and the isolation segment 103 contains non-magnetic liquid 105 that is not mixed with the magnetic fluid 101 .

[0033] With such a setting, an isolation segment 103 without magnetic induction capability can be configured between the magnetic navigation segment 102 and the magnetic stabilization segment 104, thereby setting the magnetic navigation segment 102 at the distal end of the jejunal feeding tube 110 and setting the magnetic stabilization segment 104 at other positions. During the insertion process, the magnetic navigation segment 102 at the distal end of the jejunal feeding tube 110 plays a navigation role, while the magnetic stabilization segment 104 plays a role in stabilizing the remaining segments of the jejunal feeding tube 110, thereby improving the success rate of insertion.

[0034] The magnetic fluid introduction pipe 140 is used to communicate with an external fluid injection pipe to introduce the magnetic fluid 101 into the magnetic navigation segment 102 and the magnetic stabilization segment 104 , and to introduce the non-magnetic liquid 105 into the isolation segment 103 .

[0035] It should be noted that the purpose of the non-magnetic liquid 105 is to improve stability while separating the magnetic navigation segment 102 and the magnetic stabilization segment 104. It can be adjusted according to needs, for example: Water: Water is one of the most commonly used non-magnetic liquids 105 and can be used as the base liquid of the magnetic fluid 101; since water is a polar solvent, it can be mixed with many surfactants to form a stable dispersion system of the magnetic fluid 101; Organic solvent: Organic solvents such as oil, alcohol, etc. can also be used as non-magnetic liquid 105 for the base liquid of the magnetic fluid 101; Oleic acid: Oleic acid is a commonly used surfactant used to prevent the magnetic particles in the magnetic fluid 101 from agglomerating; although oleic acid itself is not a base liquid, it is a commonly used additive in the preparation of the magnetic fluid 101, which helps to stabilize the magnetic fluid 101 and may be used to adjust the interface between the magnetic fluid 101 and other non-magnetic liquids 105; These non-magnetic liquids 105 can be used alone or mixed with other substances to achieve segmentation of the magnetic fluid 101. When selecting a suitable non-magnetic liquid 105, its compatibility with the magnetic particles in the magnetic fluid 101, chemical stability, and impact on the performance of the magnetic fluid 101 need to be considered.

[0036] Based on the above, please refer to Figure 1-Figure 7This embodiment also provides a non-invasive magnetic navigation jejunal feeding tube system 200, which includes a main frame 210, a magnetic navigation unit 220 and the above-mentioned non-invasive magnetic navigation jejunal feeding tube 100; The magnetic navigation unit 220 is connected to the main frame 210 , and is used to generate a navigation magnetic field to guide the distal end movement of the jejunal feeding tube 110 .

[0037] Please refer to Figure 1-Figure 7 The non-invasive magnetic navigation jejunal feeding tube system 200 adopts the above-mentioned non-invasive magnetic navigation jejunal feeding tube 100. During use, the magnetic navigation unit 220 can generate a navigation magnetic field to guide the distal movement of the jejunal feeding tube 110, thereby simplifying the insertion operation of the jejunal feeding tube 110, improving its insertion success rate, shortening the operation cycle, and alleviating the patient's discomfort.

[0038] It should be noted that the magnetic navigation units 220 can be arranged according to usage requirements. Similarly, multiple magnetic navigation units 220 can be configured on the main frame 210, and the strength of the induced magnetic field can be precisely controlled by adjusting the magnetic field generator in the magnetic navigation unit 220.

[0039] For details, please refer to Figure 1-Figure 7 When configuring the main frame 210, in order to adjust the position of the magnetic navigation unit 220 during the magnetic navigation process, the main frame 210 includes a fixed frame 211, a track 212, a slider 213 and a sliding frame 214; the fixed frame 211 is used to be fixed to the bed; the track 212 is connected to the fixed frame 211; the slider 213 is slidably matched with the track 212; the sliding frame 214 is connected to the slider 213; wherein the magnetic navigation unit 220 is connected to the sliding frame 214. Moreover, a movable block 215 is movably provided on the sliding frame 214, and the magnetic navigation unit 220 is connected to the movable block 215.

[0040] Thus, the position of the magnetic navigation unit 220 connected to the sliding frame 214 can be adjusted by sliding the movable block 215 relative to the sliding frame 214 and the sliding of the slider 213 relative to the track 212, thereby improving the flexibility of use. It should be noted that the sliding of the movable block 215 relative to the sliding frame 214 and the sliding of the slider 213 relative to the track 212 can be restricted by the locking structure.

[0041] From the above content, please refer to Figure 1-Figure 7Since the magnetic navigation segment 102 and the magnetic stabilization segment 104 can also be configured in the navigation tube 120, and the magnetic navigation segment 102 is spaced from the magnetic stabilization segment 104, in order to play a role of magnetic induction navigation for the magnetic navigation segment 102 and magnetic induction stabilization for the magnetic stabilization segment 104 during the insertion process, the non-invasive magnetic navigation jejunal feeding tube system 200 includes a plurality of magnetic navigation units 220; each of the magnetic navigation segment 102 and the magnetic stabilization segment 104 corresponds to magnetic induction of one magnetic navigation unit 220; Also, please refer to Figure 1-Figure 7 Since the magnetic navigation segment 102 is spaced from the magnetic stabilization segment 104, and the position of the magnetic navigation segment 102 will change as it is inserted, the main frame 210 is configured with multiple sliders 213 and multiple sliding frames 214, and each sliding frame 214 is correspondingly connected to a slider 213; each magnetic navigation unit 220 is correspondingly connected to a movable block 215 on the sliding frame 214; thereby, the movements of the magnetic navigation units 220 corresponding to the magnetic navigation segment 102 and the magnetic stabilization segment 104 are independent of each other, thereby improving the freedom and flexibility of their use.

[0042] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A non-invasive magnetic navigation jejunal feeding tube, characterized in that: The non-invasive magnetic navigation jejunal feeding tube comprises a jejunal feeding tube, a navigation tube, an endoscopic probe and a magnetic fluid introduction tube; The distal end of the jejunal feeding tube is provided with an opening; The navigation tube is arranged in the jejunal feeding tube and can move relative to the jejunal feeding tube along the axial direction of the jejunal feeding tube; the endoscopic probe is arranged at the distal end of the navigation tube and is used to close the opening and collect images outside the distal end of the jejunal feeding tube when it is pressed against the opening; The magnetic fluid introduction tube is disposed in the navigation tube and can move relative to the navigation tube along the axial direction of the navigation tube. The magnetic fluid introduction tube is used to introduce magnetic fluid into the distal end of the navigation tube. Wherein, the magnetic fluid located at the distal end of the navigation tube is used to form a magnetic navigation segment, and the magnetic navigation segment is used for magnetic induction with an external navigation magnetic field to guide the distal movement of the jejunal feeding tube.

2. The non-invasive magnetic navigation jejunal feeding tube according to claim 1, characterized in that: The cable of the endoscopic probe is led out from the proximal end of the navigation tube.

3. The non-invasive magnetic navigation jejunal feeding tube according to claim 1, characterized in that: A partition diaphragm is arranged in the navigation tube, the partition diaphragm is spaced from the navigation tube, and a magnetic fluid preset accommodating section is formed in the area between the partition diaphragm and the navigation tube.

4. The non-invasive magnetic navigation jejunal feeding tube according to claim 3, characterized in that: The partition membrane is provided with holes for the cables of the endoscope probe and the magnetic fluid introduction tube to pass through; Wherein, the magnetic fluid introduction tube can move relative to the partition diaphragm along the axial direction of the navigation tube.

5. The non-invasive magnetic navigation jejunal feeding tube according to any one of claims 1 to 4, characterized in that: The magnetic navigation segment, the isolation segment and the magnetic stabilization segment are sequentially arranged in the navigation tube along the axial direction thereof; The magnetic navigation segment and the magnetic stabilization segment are both filled with magnetic fluid, and the isolation segment is filled with non-magnetic liquid that is not mixed with the magnetic fluid.

6. The non-invasive magnetic navigation jejunal feeding tube according to claim 5, characterized in that: The magnetic fluid introduction pipe is used to communicate with an external fluid injection pipe to introduce magnetic fluid into the magnetic navigation segment and the magnetic stabilization segment, and to introduce non-magnetic liquid into the isolation segment.

7. A non-invasive magnetic navigation jejunal feeding tube system, characterized in that: The non-invasive magnetic navigation jejunal feeding tube system comprises a main frame, a magnetic navigation unit and a non-invasive magnetic navigation jejunal feeding tube as claimed in any one of claims 1 to 6; The magnetic navigation unit is connected to the main frame, and is used to generate a navigation magnetic field to guide the distal end movement of the jejunal feeding tube.

8. The non-invasive magnetic navigation jejunal feeding tube system according to claim 7, characterized in that: The main frame includes a fixed frame, a track, a slider and a sliding frame; The fixing frame is used to be fixed to the bed; the track is connected to the fixing frame; the slider is slidably matched with the track; the sliding frame is connected to the slider; Wherein, the magnetic navigation unit is connected to the sliding frame.

9. The non-invasive magnetic navigation jejunal feeding tube system according to claim 8, characterized in that: A movable block is movably arranged on the sliding frame, and the magnetic navigation unit is connected to the movable block.

10. The non-invasive magnetic navigation jejunal feeding tube system according to claim 9, characterized in that: The non-invasive magnetic navigation jejunal feeding tube system includes a plurality of magnetic navigation units; The main frame is configured with a plurality of the sliders and a plurality of the sliding frames, and each of the sliding frames is correspondingly connected to one of the sliders; Each of the magnetic navigation units is correspondingly connected to one of the movable blocks on the sliding frame; Wherein, each of the magnetic navigation segment and the magnetic stabilization segment corresponds to a magnetic induction of the magnetic navigation unit.

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