Multi-point small intestine sampling device
By designing a multi-point small intestine sampling device, using a multi-channel sampling technology combined with a balloon and a gravity hammer, the error problem caused by the separate sampling of the small intestine liquid collection tube is solved, and efficient, accurate sampling and patient comfort in multiple areas of the small intestine are achieved.
Patent Information
- Application Number
- CN202422255224.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing small intestinal fluid extraction tube can only sample multiple areas of the small intestine alone, which can easily lead to mixing intestinal fluid in different areas, resulting in sampling errors.
A multi-point small intestinal sampling device is designed, including a small intestinal sampling tube, a balloon, a gravity hammer and a guidewire channel. Through the cooperation of the balloon and a gravity hammer, a specific area of the small intestine is quickly positioned and sampled, and multiple sampling channels are used to independently sample.
Simultaneous sampling of multiple areas of the small intestine is achieved, reducing intestinal fluid mixing errors, improving sampling efficiency and accuracy, and reducing patient discomfort.
Smart Images
Figure CN223299111U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a multi-point small intestine sampling device. Background Art
[0002] Under the existing technology, the small intestinal liquid sampling tube is operated by the operator, passed through the patient's nasopharynx into the digestive tract, and slowly passed to the specific small intestinal area where sampling is required. Finally, the intestinal fluid of the specific small intestinal area is extracted and sampled at the end of the small intestinal liquid sampling tube.
[0003] The currently commonly used small intestinal fluid collection tube has the following problems: there are only two pathways in the small intestinal fluid collection tube (a sampling pathway and a guidewire pathway, the sampling pathway is used to sample intestinal fluid, and the guidewire pathway is used for the guidewire to pass through to assist the small intestinal fluid collection tube to pass into the patient's intestine). When it is necessary to sample multiple areas of the small intestine (ileum, jejunum, duodenum, etc.), the operator can only control the small intestinal fluid collection tube to pass to different areas of the small intestine respectively, and then draw intestinal fluid for sampling in turn. During the operation, it is very easy for the intestinal fluid from different areas to mix, resulting in sampling errors.
[0004] Therefore, there is an urgent need for a new multi-point small intestine sampling device to facilitate the operator to simultaneously sample multiple specific areas of the patient's small intestine without affecting each other. Utility Model Content
[0005] The utility model is developed to solve the above problems, and aims to provide a multi-point small intestine sampling device.
[0006] The utility model provides a multi-point small intestine sampling device with the following characteristics, including: a small intestine sampling tube, wherein a guide wire channel, a balloon connecting channel and a plurality of sampling channels are provided inside the tube along its length direction, and the side wall of the small intestine sampling tube has suction ports connected to the corresponding sampling channels at different preset positions; a balloon, which is arranged at one end of the small intestine sampling tube, and the balloon is respectively connected to the guide wire channel and the balloon connecting channel; and a gravity hammer, which is connected to the end of the balloon away from the small intestine sampling tube, wherein the sampling channels include at least an ileum sampling channel, a jejunum sampling channel and a duodenum sampling channel, and are used to sample the ileum, jejunum and duodenum respectively through the corresponding suction ports.
[0007] The multi-point small intestine sampling device provided by the present invention may also have the following features: the small intestine sampling tube is a circular tube with a radial outer diameter of no more than 4.8 mm; the guide wire channel, balloon connection channel, ileum sampling channel, jejunum sampling channel and duodenum sampling channel are all circular channels; the above five are evenly distributed inside the small intestine sampling tube and have radial inner diameters of 1.2 mm; the central axis of the guide wire channel coincides with the central axis of the small intestine sampling tube.
[0008] The multi-point small intestine sampling device provided by the present invention may also have the following features: the small intestine sampling tube is a round tube with a radial outer diameter of no more than 4 mm, the guide wire channel is a circular channel with a radial inner diameter of 1.1 mm, the axis of which coincides with the central axis of the small intestine sampling tube, the radial cross-sections of the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenal sampling channel are all rounded quadrilaterals, the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenal sampling channel are all surrounded by a circle around the guide wire channel and are not directly connected to each other, the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenal sampling channel are all rounded quadrilaterals ... The radial cross-sections of the sampling channel, jejunum sampling channel and duodenal sampling channel together form an intermittent hollow annular structure with an outer diameter of 3.2 mm and an inner diameter of 1.9 mm. The spacing between adjacent radial cross-sections of the balloon connecting channel, ileum sampling channel, jejunum sampling channel and duodenal sampling channel is 0.4 mm. The bending radius of the radial cross-sections of the ileum sampling channel, jejunum sampling channel and duodenal sampling channel is θ1, the bending radius of the radial cross-section of the balloon connecting channel is θ2, and 0°<θ2<60°<θ1<100°.
[0009] The multi-point small intestine sampling device provided by the present invention may also have the following features: wherein, the suction port includes an ileal suction port, a jejunal suction port and a duodenal suction port, which correspond to the ileal sampling channel, the jejunal sampling channel and the duodenal sampling channel respectively, and the end of the small intestine sampling tube that is not connected to the balloon is marked as the lead-out end. There is a mark on the small intestine sampling tube at 60 cm away from the lead-out end. The mark is used for the operator to position the small intestine sampling tube in the patient's nasopharynx and throat. The distance between the duodenal suction port and the mark is 97 cm to 103 cm, the distance between the jejunal suction port and the mark is 157 cm to 163 cm, the distance between the ileal suction port and the mark is 217 cm to 223 cm, the distance between the balloon and the mark is 225 cm, and the distance between the gravity hammer and the mark is 227 cm.
[0010] The multi-point small intestine sampling device provided by the present invention may also have the following features: the number of ileal suction ports, jejunal suction ports and duodenal suction ports are all 3, the distances between the 3 duodenal suction ports and the marks are 97 cm, 100 cm and 103 cm respectively, the distances between the 3 jejunal suction ports and the marks are 157 cm, 160 cm and 163 cm respectively, and the distances between the 3 ileal suction ports and the marks are 217 cm, 220 cm and 223 cm respectively.
[0011] The multi-point small intestine sampling device provided by the present invention may also have the following features: wherein, the multi-point small intestine sampling device also includes a plurality of tantalum rings, which are fixed and at least partially embedded in the small intestine sampling tube, and the small intestine sampling tube is fixed with different numbers of tantalum rings on the side of the ileum suction port, the jejunum suction port and the duodenal suction port away from the gravity hammer, so that the positions of the three different groups of suction ports can be distinguished and located by imaging equipment.
[0012] The multi-point small intestine sampling device provided by the present invention may also have the following features: wherein, the multi-point small intestine sampling device also includes: a guide tube, four guide tubes are respectively connected to the balloon connection channel, the ileum sampling channel, the jejunum sampling channel and the duodenum sampling channel at the end of the small intestine sampling tube that is not connected to the balloon; and a guide wire, which is passed through the guide wire channel to assist the operator in inserting the small intestine sampling tube into the patient's intestine.
[0013] The multi-point small intestine sampling device provided by the present invention may also have the following features: the multi-point small intestine sampling device also includes several syringes, which are connected and communicated with the end of the outlet tube for use by the operator to extract intestinal fluid in the ileum, jejunum and duodenum or inject air, water or contrast agent into the balloon.
[0014] The multi-point small intestine sampling device provided by the present invention may also have the following features: there are a plurality of gravity hammers, and the gravity hammers are connected in sequence through a stable flexible material.
[0015] The multi-point small intestine sampling device provided by the present invention may also have the following features: wherein the gravity weight is a plumb bob, the total mass of the plumb bob is 7.75 g, and the maximum volume of the balloon is 7 mL.
[0016] Functions and effects of utility models
[0017] According to the multi-point small intestine sampling device involved in the present invention, it includes: a small intestine sampling tube, which is provided with a guide wire channel, a balloon connecting channel and several sampling channels along its length direction, and the side wall of the small intestine sampling tube has suction ports connected to the corresponding sampling channels at different preset positions; a balloon, which is arranged at one end of the small intestine sampling tube, and the balloon is respectively connected to the guide wire channel and the balloon connecting channel; and a gravity hammer, which is connected to the end of the balloon away from the small intestine sampling tube, wherein the sampling channels include at least an ileum sampling channel, a jejunum sampling channel and a duodenum sampling channel, which are used to sample the ileum, jejunum and duodenum through the corresponding suction ports respectively.
[0018] Therefore, the multi-point small intestinal sampling device of the present invention can, through the force of the gravity hammer and the balloon, follow intestinal peristalsis to reach a designated location as quickly as possible, thereby sampling a specific area of the small intestine and obtaining small intestinal fluid from the designated area. Furthermore, the balloon's separate connection with the guidewire channel and the balloon connection channel effectively improves the utilization efficiency of the internal channel of the small intestinal sampling tube, further reducing the radial cross-section of the balloon connection channel. Ultimately, the radial outer diameter of the small intestinal sampling tube can be minimized, thereby reducing patient discomfort during insertion into the patient's intestines. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic structural diagram of a multi-point small intestine sampling device according to an embodiment of the present utility model;
[0020] Figure 2 is a radial cross-sectional view of a small intestine sampling tube according to an embodiment of the present utility model;
[0021] Figure 3 yes Figure 2 Schematic diagram of the diameter dimension marking of the radial cross section of the corresponding small intestine sampling tube;
[0022] Figure 4 yes Figure 2 Schematic diagram of the wall dimensions of the radial cross section of the corresponding small intestine sampling tube;
[0023] Figure 5 yes Figure 2 Schematic diagram of the angle dimensions of the corresponding radial cross section of the small intestine sampling tube;
[0024] Figure 6 This is a three-dimensional diagram of the multi-point small intestine sampling device at the tantalum ring of an embodiment of the present utility model;
[0025] Figure 7 yes Figure 6 The corresponding stereogram from another angle. DETAILED DESCRIPTION
[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the following embodiments and accompanying drawings specifically illustrate a multi-point small intestine sampling device of the present invention.
[0027] <Example>
[0028] Figure 1 It is a schematic structural diagram of a multi-point small intestine sampling device according to an embodiment of the present utility model.
[0029] like Figure 1As shown, this embodiment provides a multi-point small intestine sampling device 100, including a small intestine sampling tube 10, a tantalum ring 20, a balloon 30, a gravity hammer 40, an integrated block 50, a guide wire 60, a guide tube 70 and a syringe (not shown in the figure).
[0030] Figure 2 is a radial cross-sectional view of a small intestine sampling tube according to an embodiment of the present utility model; Figure 3 yes Figure 2 Schematic diagram of the diameter dimension marking of the radial cross section of the corresponding small intestine sampling tube.
[0031] like Figures 1 to 3 As shown, the small intestine sampling tube 10 is a silicone round tube with a total length of 285 cm and a radial outer diameter R=4 mm.
[0032] The small intestine sampling tube 10 is provided with a guide wire channel a, a balloon connection channel b, a duodenum sampling channel c-1, a jejunum sampling channel d-1 and an ileum sampling channel e-1 along its length.
[0033] The guidewire channel a is a circular channel with a radial inner diameter r1 = 1.1 mm, wherein the axis thereof coincides with the central axis of the small intestine sampling tube 10 .
[0034] The radial cross-sections of the balloon connecting channel b, the duodenal sampling channel c-1, the jejunal sampling channel d-1, and the ileal sampling channel e-1 are all rounded quadrilaterals.
[0035] The balloon connection channel b, the duodenal sampling channel c-1, the jejunal sampling channel d-1 and the ileal sampling channel e-1 are all surrounded by the guidewire channel a and are not directly connected to each other.
[0036] The radial cross-sections of the balloon connecting channel b, the duodenal sampling channel c-1, the jejunal sampling channel d-1 and the ileal sampling channel e-1 together form an intermittent hollow annular structure with an outer diameter r2 = 3.2 mm and an inner diameter r3 = 1.9 mm.
[0037] Figure 4 yes Figure 2 Schematic diagram of the wall dimensions of the radial cross-section of the corresponding small intestine sampling tube.
[0038] like Figures 1 to 4 As shown, the radial cross sections of the balloon connecting channel b, the duodenal sampling channel c-1, the jejunal sampling channel d-1, and the ileal sampling channel e-1 have a spacing of L=0.4 mm between any two of them.
[0039] Figure 5 yes Figure 2 Schematic diagram of the angle dimensioning of the radial cross section of the corresponding small intestine sampling tube.
[0040] like Figures 1 to 5 As shown, the curvature of the radial cross-section of the duodenal sampling channel c-1, the jejunal sampling channel d-1, and the ileal sampling channel e-1 is θ1, the curvature of the radial cross-section of the balloon connecting channel b is θ2, and 0°<θ2<60°<θ1<100°.
[0041] The two ends of the small intestine sampling tube 10 are respectively marked as the outlet end m and the sampling end n. There is a smear mark f on the tube body of the small intestine sampling tube 10 60 cm away from the outlet end m. The smear mark f is used for the operator to position the small intestine sampling tube 10 in the patient's nasopharynx.
[0042] Figure 6 This is a three-dimensional diagram of the multi-point small intestine sampling device at the tantalum ring of an embodiment of the present utility model; Figure 7 yes Figure 6 The corresponding stereogram from another angle.
[0043] like Figures 1 to 7 As shown, the small intestine sampling tube 10 has a duodenal suction port c-2 on the tube body at 97 cm, 100 cm and 103 cm away from the smear mark f, and the three duodenal suction ports c-2 are all connected to the duodenal sampling channel c-1; the small intestine sampling tube 10 has a jejunal suction port d-2 on the tube body at 157 cm, 160 cm and 163 cm away from the smear mark f, and the three jejunal suction ports d-2 are all connected to the jejunal sampling channel d-1; the small intestine sampling tube 10 has an ileal suction port e-2 on the tube body at 217 cm, 220 cm and 223 cm away from the smear mark f, and the three ileal suction ports e-2 are all connected to the ileal sampling channel e-1.
[0044] Six tantalum rings 20 are inserted and fixed onto the small intestinal sampling tube 10. One tantalum ring 20 is inserted above the duodenal sampling channel c-1, near the outlet end m; two tantalum rings 20 are inserted above the jejunal suction port d-2, near the outlet end m; and three tantalum rings 20 are inserted above the ileal suction port e-2, near the outlet end m. This allows the positions of the three different suction ports to be distinguished and located using imaging equipment.
[0045] The balloon 30 is positioned at the sampling end n of the small intestinal sampling tube 10, 225 cm from the smear mark f. The balloon 30 is connected to the guidewire channel a and the balloon connection channel b. The maximum volume of the balloon 30 in this embodiment is 7 mL.
[0046] The three weights 40 are plumb bobs, with a total mass of 7.75 g. The three weights 40 are connected in sequence by a stable flexible material and fixed to the end of the balloon 30 away from the small intestine sampling tube 10. In this embodiment, the shortest distance between the weights 40 and the smear mark f is 227 cm.
[0047] The integrated block 50 is a truncated cone-shaped structure that is narrow at the top and wide at the bottom. The upper surface of the truncated cone-shaped structure is connected and fixed to the lead-out end m.
[0048] The guide wire 60 can be pulled through the integrated block 50 and inserted into the guide wire channel a to assist in introducing the small intestine sampling tube 10 into the patient's body.
[0049] There are 4 outlet tubes 60, all of which are arranged at the integrated block 50 on the outlet end m, and are connected to the balloon connection channel b, the duodenal sampling channel c-1, the jejunal sampling channel d-1 and the ileal sampling channel e-1 through internal pipelines.
[0050] The number of syringes is 4, which are respectively connected to the ends of the 4 outlet tubes 60. In this embodiment, the connection between the syringe and the outlet tube 60 is further provided with a valve which can be opened and closed manually.
[0051] The use process of the multi-point small intestine sampling device 100:
[0052] S01, assembling the various components of the multi-point small intestine sampling device 100 after strict disinfection and sterilization.
[0053] S02, the sampling end n of the small intestine sampling tube 10 of the multi-point small intestine sampling device 100 is inserted into the digestive tract through the patient's nose or throat until the smear mark f is exactly located at the patient's nose or throat.
[0054] In this step, the guide wire 60 inserted into the guide wire channel a assists in introducing the small intestine sampling tube 10 into the patient's body; at the same time, during the slow introduction process, the balloon 30 is inflated and deflated at regular intervals using a syringe through the balloon connecting channel b to assist in the introduction of the small intestine sampling tube 10.
[0055] S03, using X-rays to observe the specific positions of different numbers of tantalum rings 20 to determine whether the small intestine sampling tube 10 has been introduced into the designated small intestine sampling position.
[0056] In this step, contrast agent can also be injected into the balloon 30 through the guide wire channel a and the balloon connecting channel b by a syringe, and then X-ray is used to confirm that the small intestine sampling tube 10 has been introduced into the designated small intestine sampling position.
[0057] S04, using a syringe, through the duodenal sampling channel c-1, jejunal sampling channel d-1 and ileal sampling channel e-1, from the duodenal suction port c-2, jejunal suction port d-2 and ileal suction port e-2 to draw samples of intestinal fluid from the ileum, duodenum and jejunum respectively.
[0058] S05, slowly extracting the entire multi-point small intestine sampling device 100, disassembling it, and cleaning and disinfecting it.
[0059] Functions and Effects of the Embodiments
[0060] According to the present embodiment, a multi-point small intestine sampling device is provided, which includes: a small intestine sampling tube, which is provided with a guide wire channel, a balloon connecting channel and a plurality of sampling channels along its length, and the side wall of the small intestine sampling tube has suction ports connected to the corresponding sampling channels at different preset positions; a balloon, which is arranged at one end of the small intestine sampling tube, and the balloon is respectively connected to the guide wire channel and the balloon connecting channel; and a gravity hammer, which is connected to the end of the balloon away from the small intestine sampling tube, wherein the sampling channels include at least an ileum sampling channel, a jejunum sampling channel and a duodenum sampling channel, which are used to sample the ileum, jejunum and duodenum through the corresponding suction ports respectively.
[0061] Therefore, the multi-point small intestinal sampling device of this embodiment can be driven by the gravity hammer and balloon to reach a designated location as quickly as possible with intestinal peristalsis, thereby sampling a specific area of the small intestine and obtaining small intestinal fluid from the designated area. Furthermore, the balloon's separate connection with the guidewire channel and the balloon connection channel effectively improves the utilization efficiency of the internal channel of the small intestinal sampling tube, further reducing the radial cross-section of the balloon connection channel. Ultimately, the radial outer diameter of the small intestinal sampling tube can be minimized, thereby reducing patient discomfort during the passage of the tube into the patient's intestine.
[0062] Furthermore, the small intestinal sampling tube is a circular tube with a radial outer diameter of no more than 4 mm, the guidewire channel is a circular channel with a radial inner diameter of 1.1 mm, the axis of which coincides with the central axis of the small intestinal sampling tube, the radial cross-sections of the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenum sampling channel are all rounded quadrilaterals, the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenum sampling channel are all surrounded by a circle around the guidewire channel and are not directly connected to each other, the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel and the duodenum sampling channel are all rounded quadrilaterals. The radial cross-sections of the small intestinal sampling channel together form a discontinuous hollow annular structure with an outer diameter of 3.2 mm and an inner diameter of 1.9 mm. The spacing between adjacent radial cross-sections of the balloon connecting channel, ileal sampling channel, jejunal sampling channel, and duodenal sampling channel is 0.4 mm. The curvature of the radial cross-sections of the ileal, jejunal, and duodenal sampling channels is θ1, while the curvature of the radial cross-section of the balloon connecting channel is θ2, with 0° < θ2 < 60° < θ1 < 100°. This configuration changes the radial cross-section of the internal passageway of the small intestinal sampling tube, effectively increasing the utilization rate of the radial cross-sections of each passageway. Ultimately, the radial outer diameter of the small intestinal sampling tube can be minimized, thereby reducing patient discomfort during its insertion into the patient's intestines.
[0063] Furthermore, the suction ports include an ileal suction port, a jejunal suction port, and a duodenal suction port, which correspond to the ileal sampling channel, the jejunal sampling channel, and the duodenal sampling channel, respectively. The end of the small intestinal sampling tube not connected to the balloon is marked as the outlet end. The small intestinal sampling tube has a mark 60 cm from the outlet end, which is used by the operator to position the small intestinal sampling tube in the patient's nasopharynx. The distance from the duodenal suction port to the mark is 97 cm to 103 cm, the distance from the jejunal suction port to the mark is 157 cm to 163 cm, the distance from the ileal suction port to the mark is 217 cm to 223 cm, the distance from the balloon to the mark is 225 cm, and the distance from the gravity hammer to the mark is 227 cm. This arrangement ensures that each suction port matches the small intestinal area to be sampled.
[0064] Furthermore, the number of ileal, jejunal, and duodenal suction ports is three. The distances from the three duodenal suction ports to the markings are 97 cm, 100 cm, and 103 cm, respectively. The distances from the three jejunal suction ports to the markings are 157 cm, 160 cm, and 163 cm, respectively. The distances from the three ileal suction ports to the markings are 217 cm, 220 cm, and 223 cm, respectively. With this arrangement, the number of each suction port is three, which improves the success rate of sampling. Even if one of the suction ports is blocked, the other suction ports can still successfully sample intestinal fluid (the probability of multiple suction ports being blocked at the same time is low).
[0065] Furthermore, the multi-point small intestinal sampling device includes several tantalum rings secured to and at least partially embedded in the small intestinal sampling tube. Different numbers of tantalum rings are secured to the small intestinal sampling tube at the ileal, jejunal, and duodenal suction ports, respectively, on the side away from the gravity hammer. This arrangement allows medical personnel to distinguish and locate the positions of the three different sets of tantalum rings using imaging equipment, thereby indirectly determining the location of the suction ports.
[0066] Furthermore, the multi-point small intestinal sampling device also includes: a guide tube, wherein the four guide tubes are connected to the balloon connection channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel at the end of the small intestinal sampling tube that is not connected to the balloon; a guide wire, which is passed through the guide wire channel to assist the operator in inserting the small intestinal sampling tube into the patient's intestine; and a plurality of syringes, which are connected and connected to the ends of the guide tubes and are used by the operator to extract intestinal fluid from the ileum, jejunum, and duodenum or inject air, water, or contrast agent into the balloon. With this arrangement, the guide tube can conduct different relatively dense pathways to the outside, making it more convenient to connect an external syringe (the original four pathways are relatively dense, and it is difficult to directly connect a syringe); the guide wire is passed through the guide wire channel to assist the operator in inserting the small intestinal sampling tube into the patient's intestine.
[0067] Furthermore, there are multiple gravity hammers, each connected in sequence by a stable, flexible material. The gravity hammers are plumb bobs with a total mass of 7.75g, and the maximum volume of the balloon is 7mL. This arrangement allows the small intestinal sampling tube and its various suction ports to reach the designated location as quickly as possible with intestinal peristalsis, thereby sampling a specific area of the small intestine and obtaining small intestinal fluid from the designated area.
[0068] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-point small intestine sampling device, characterized in that: include: The small intestine sampling tube has a guide wire channel, a balloon connection channel, and a plurality of sampling channels provided therein along its length, and the side wall of the small intestine sampling tube has suction ports connected to the corresponding sampling channels at different preset positions; a balloon, disposed at one end of the small intestine sampling tube, the balloon being in communication with the guidewire channel and the balloon connecting channel respectively; and A gravity hammer is connected to the end of the balloon away from the small intestine sampling tube. The sampling channels at least include an ileum sampling channel, a jejunum sampling channel and a duodenum sampling channel, which are used to sample the ileum, jejunum and duodenum respectively through the corresponding suction ports.
2. The multi-point small intestine sampling device according to claim 1, characterized in that: in, The small intestine sampling tube is a circular tube with a radial outer diameter not greater than 4.8 mm. The guidewire channel, the balloon connection channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel are all circular channels, and the above five channels are evenly distributed inside the small intestine sampling tube and have a radial inner diameter of 1.2 mm. The central axis of the guide wire channel coincides with the central axis of the small intestine sampling tube.
3. The multi-point small intestine sampling device according to claim 1, characterized in that: in, The small intestine sampling tube is a round tube with a radial outer diameter not greater than 4 mm. The guidewire channel is a circular channel with a radial inner diameter of 1.1 mm, the axis of which coincides with the central axis of the small intestine sampling tube. The radial cross-sections of the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel are all rounded quadrilaterals. The balloon connection channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel are all surrounded by the guide wire channel and are not directly connected to each other. The radial cross sections of the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel together form an intermittent hollow annular structure, the outer diameter of the hollow annular structure is 3.2 mm, the inner diameter is 1.9 mm, and the radial cross sections of the balloon connecting channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel are spaced 0.4 mm apart from each other. The curvature of the radial cross section of the ileum sampling channel, the jejunum sampling channel and the duodenum sampling channel is θ1, the curvature of the radial cross section of the balloon connecting channel is θ2, and 0°<θ2<60°<θ1<100°.
4. The multi-point small intestine sampling device according to claim 1, characterized in that: in, The suction port includes an ileum suction port, a jejunum suction port, and a duodenum suction port, which are connected to the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel respectively. The end of the small intestinal sampling tube that is not connected to the balloon is marked as the outlet end. The small intestinal sampling tube has a mark 60 cm away from the outlet end. The mark is used by the operator to position the small intestinal sampling tube in the patient's nasopharynx. The distance between the duodenal suction port and the mark is 97 cm to 103 cm, the distance between the jejunal suction port and the mark is 157 cm to 163 cm, and the distance between the ileal suction port and the mark is 217 cm to 223 cm. The distance between the balloon and the marker is 225 cm. The distance between the gravity hammer and the mark is 227 cm.
5. The multi-point small intestine sampling device according to claim 4, characterized in that: in, The number of the ileal suction port, the jejunal suction port, and the duodenal suction port are all 3, The distances between the three duodenal suction ports and the marker are 97 cm, 100 cm, and 103 cm, respectively. The distances between the three jejunal suction ports and the markers are 157 cm, 160 cm, and 163 cm, respectively. The distances between the three ileal suction ports and the marker are 217 cm, 220 cm and 223 cm respectively.
6. The multi-point small intestine sampling device according to claim 4 or 5, characterized in that: in, The multi-point small intestine sampling device also includes several tantalum rings, The tantalum ring is fixed to and at least partially embedded in the small intestine sampling tube. The small intestine sampling tube is respectively fixed with different numbers of tantalum rings on the side of the ileum suction port, the jejunum suction port and the duodenal suction port away from the gravity hammer, so that the positions of the three different groups of suction ports can be distinguished and located by imaging equipment.
7. The multi-point small intestine sampling device according to claim 1, Its characteristics are: in, The multi-point small intestine sampling device also includes: Export tubes, wherein the four export tubes are connected to the balloon connection channel, the ileum sampling channel, the jejunum sampling channel, and the duodenum sampling channel respectively at the end of the small intestine sampling tube that is not connected to the balloon; and A guide wire is passed through the guide wire channel to assist the operator in extending the small intestine sampling tube into the patient's intestine.
8. The multi-point small intestine sampling device according to claim 7, characterized in that: in, The multi-point small intestine sampling device also includes several syringes, The syringe is connected to and communicated with the end of the outlet tube, and is used by the operator to extract intestinal fluid from the ileum, jejunum and duodenum or to inject air, water or contrast agent into the balloon.
9. The multi-point small intestine sampling device according to claim 1, characterized in that: in, There are several gravity hammers, and the several gravity hammers are connected in sequence through stable flexible materials.
10. The multi-point small intestine sampling device according to claim 1, characterized in that: in, The gravity weight is a plumb bob, and the total mass of the plumb bob is 7.75g. The maximum volume of the balloon is 7 mL.