Small intestine extraction catheter

Abstract

The utility model discloses a small intestine extraction catheter which comprises a supporting core tube, an outer tube and a guide head, the supporting core tube is sleeved with the outer tube, the outer tube is in a lantern-shaped axial folding shape, and the outer tube can be stretched after being stressed; the guiding head is located at the first end of the outer pipe, and an opening is formed in the second end of the outer pipe. The supporting core pipe is used for being placed in the outer pipe from the open end to play a supporting role. The guiding head is provided with a side hole sealed by a small intestine soluble material, and the small intestine soluble material is insoluble in gastric acid. The supporting core tube has certain hardness and can help the catheter enter the stomach from the oral cavity; the folding structure of the outer tube makes the outer tube soft, and after the supporting core tube is pulled out, the discomfort of the throat of the patient can be relieved; the outer tube can be automatically unfolded under peristalsis of the stomach and the small intestine, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a small intestine extraction catheter. Background Art

[0002] Small intestinal fluid is secreted by the small intestinal glands in the small intestinal mucosa. It is weakly alkaline with a pH value of about 8-9. The daily secretion volume of an adult is about 1 to 3 L. Small intestinal fluid is secreted and absorbed at the same time. This fluid exchange provides a medium for the absorption of nutrients in the small intestine.

[0003] Therefore, the composition and pH value of the fluid extracted from the small intestine are quite different from those of gastric juice. The extraction and analysis of small intestinal fluid is of great help in some basic diagnosis.

[0004] There are two existing methods for extracting small intestinal fluid: catheter and capsule. The catheter extraction method is to insert a catheter into the small intestine from the mouth or stomach, and extract the small intestinal fluid by negative pressure suction; in this method, a long catheter is inserted from the patient's mouth, which makes the patient feel uncomfortable and takes a long time for the doctor to operate; the advantage of this method is that the sampling is accurate and the amount of small intestinal fluid obtained is large.

[0005] The capsule method uses a capsule with a controllable valve to be swallowed, and after the capsule enters the small intestine, the valve is opened to collect the small intestinal fluid, and the valve is closed before the capsule leaves the small intestine area. After the capsule is excreted by the human body, the small intestinal fluid in the capsule is recovered and obtained. Capsule extraction is more comfortable for patients, but it has the problems of less extracted liquid, low valve control reliability and easy failure. Utility Model Content

[0006] In view of this, the utility model proposes a small intestine extraction catheter, which shortens the length of the catheter entering from the oral cavity and quickly delivers it to the small intestine to alleviate the patient's discomfort. The utility model provides the following technical solutions:

[0007] A small intestine extraction catheter comprises a supporting core tube (1), an outer tube (2) and a guide head (3), wherein: the outer tube (2) is sleeved outside the supporting core tube (1) and is in a lantern-shaped axially folded shape, and can be stretched after being subjected to force; the guide head (3) is located at the first end of the outer tube (2), and the second end of the outer tube (2) is provided with an opening; the supporting core tube (1) is used to be placed in the outer tube (2) from the open end to play a supporting role; the guide head (3) has a side hole (4) sealed with a small intestine soluble material, and the small intestine soluble material is insoluble in gastric acid.

[0008] Optionally, the outer tube (2) and the guide head (3) are an integral structure.

[0009] Optionally, the support core tube (1) has a diameter of 0.5-1.5 mm and a length of 500-2000 mm.

[0010] Optionally, the outer tube (2) has a thin diameter of 0.8-2 mm and a thick diameter of 1.5-4.5 mm.

[0011] Optionally, the length of the outer tube (2) after being stretched is 3-5 times that of the supporting core tube (1).

[0012] Optionally, the guide head (3) is in the shape of a fishtail.

[0013] Optionally, the guide head (3) is no wider than 12 mm at the axial width of the outer tube (2).

[0014] Optionally, the outer wall of the outer tube (2) is provided with a lubricating coating.

[0015] Optionally, one end of the support core tube (1) located inside the outer tube (2) is a smooth curved surface.

[0016] Optionally, the guide head (3) is a hollow structure.

[0017] Optionally, the guide head (3) is provided with an ultrasound or X-ray development structure (5).

[0018] Optionally, the guide head (1) is filled with water-absorbing material.

[0019] Optionally, the water-absorbing material is located in a connection channel connecting the guide head (3) to the outer tube (2).

[0020] Optionally, a through hole is provided at the distal end of the support core tube (1), and the through hole is connected to the negative pressure generating structure.

[0021] According to the technical solution of the utility model, the small intestine extraction catheter includes a support core tube, an outer tube and a guide head. The outer tube is sleeved outside the support core tube and is in a lantern-shaped axial folded shape, which can be stretched after being stressed; the guide head is located at the first end of the outer tube, and the second end of the outer tube is provided with an opening; the guide head has a side hole sealed with a small intestine soluble material, and the material is insoluble in gastric acid. The support core tube of the utility model has a certain hardness, which can help the catheter enter the stomach from the oral cavity; the folding structure of the outer tube makes it relatively soft, and after the support core tube is removed, the discomfort of the patient's throat can be reduced; the outer tube can be automatically unfolded under the peristalsis of the stomach and small intestine, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For the purpose of illustration and not limitation, the present invention will now be described according to its preferred embodiments, particularly with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a front view of the small intestine extraction catheter in a folded state according to an embodiment of the utility model.

[0024] Figure 2 It is a top view of the small intestine extraction catheter in a folded state according to an embodiment of the utility model.

[0025] Figure 3 It is a structural schematic diagram of a supporting core tube according to an embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the integrated structure of the outer tube and the guide head in an embodiment of the utility model.

[0027] Figure 5 It is a front view of the small intestine extraction catheter in the expanded state according to the embodiment of the utility model.

[0028] Figure 6 It is a top view of the small intestine extraction catheter in the expanded state according to the embodiment of the utility model.

[0029] Figure 7 It is a schematic diagram of the unfolded state of the integrated structure of the outer tube and the guide head.

[0030] In the figure, 1-support core tube, 2-outer tube, 3-guide head, 4-side hole, 5-ultrasound or X-ray development structure. DETAILED DESCRIPTION

[0031] like Figure 1 , 2 As shown, the utility model discloses a small intestine extraction catheter, comprising a support core tube 1, an outer tube 2 and a guide head 3; the material of the support core tube 1 is slightly harder than the telescopic outer tube 2, and plays a certain supporting role, making it convenient for doctors to operate the catheter. The diameter of the support core tube 1 is 0.5-1.5mm, and the length is 500-2000mm.

[0032] See also Figure 3 , Figure 3 It is a structural schematic diagram of the support core tube of an embodiment of the utility model; the distal end of the support core tube 1 is a smooth curved surface, which can be circular or elliptical to prevent scratching the outer tube 2 and the guide head 3; in the embodiment of the utility model, one end of the guide head 3 is first placed in the oral cavity, and after the catheter enters the small intestine, it is far away from the oral cavity and is set as the distal end.

[0033] The outer tube 2 is sleeved outside the supporting core tube 1, and is folded axially in a lantern shape, and can be stretched after being stressed. The outer tube 2 has a thin diameter between 0.8-2 mm and a thick diameter between 1.5-4.5 mm. In the folded state, the length of the outer tube 2 is close to that of the supporting core tube 1, and the stretched length is 3-5 times that of the supporting core tube 1.

[0034] The outer tube 2 has a lubricating coating to prevent scratching of the intestines. The outer tube 2 can be folded or stretched with the peristalsis of the intestines, and will not cause traction on the intestines, thereby ensuring safety.

[0035] The guide head 3 is hollow and extends in the radial direction of the outer tube after being unfolded to form a fishtail-like shape, which can increase friction so that the peristalsis of the stomach and intestines can stretch the outer tube 2. The guide head 3 has a side hole 4 sealed with a small intestine soluble material. This material is insoluble in gastric acid, which can ensure that the guide head 3 is opened only after entering the small intestine.

[0036] The guide head 3 is also provided with an ultrasound or X-ray imaging structure 5 to facilitate tracking the position of the guide head 3 outside the body.

[0037] The guide head 3 is filled with absorbent material to help the small intestinal fluid enter, and at the same time it can filter the food in the small intestine to prevent the outer tube 2 from being blocked by food.

[0038] The widest part of the guide head 3 after unfolding does not exceed 12 mm, and two side holes 4 are arranged on each side.

[0039] A through hole is provided at the distal end of the support core tube 1, which is connected to the negative pressure generating structure; the negative pressure generating structure can be a small vacuum pump arranged outside the body, and the small vacuum pump is connected to the proximal end of the support core tube 1 through a pipe. At the same time, the support core tube 1 is a hollow tubular structure; the support core tube 1 is connected to the negative pressure generating structure, so that more small intestinal fluid can be sucked in.

[0040] The small intestine extraction catheter in this embodiment is used as follows:

[0041] 1. Insert the guide tip from the patient's mouth through the esophagus into the stomach;

[0042] 2. Under the peristalsis of the stomach, the outer tube 2 is stretched and enters the small intestine, and the supporting core tube 1 is removed at the same time. Since the outer tube 2 is relatively soft, the discomfort of the patient's throat can be alleviated;

[0043] 3. After entering the small intestine, the intestinal soluble material blocking the side hole 4 of the guide head 3 is dissolved by the small intestinal fluid, and the small intestinal fluid enters the guide head 3 from the side hole 4;

[0044] During this process, ultrasound or X-ray imaging can be used to track the position of the guide head 3;

[0045] Finally, the catheter is slowly withdrawn to complete the sampling of small intestinal fluid.

[0046] According to the technical solution of the embodiment of the utility model, the material of the support core tube 1 is slightly harder than the telescopic outer tube 2, which plays a certain supporting role and can help the catheter enter the stomach from the mouth. The outer tube 2 is folded and can be stretched after being stressed, and is sleeved outside the support core tube 1; the folding structure of the outer tube 2 makes it relatively soft, and after the support core tube 1 is removed, the discomfort of the patient's throat can be alleviated; the outer tube 2 can automatically unfold under the peristalsis of the stomach and small intestine, and the operation is convenient; the outer tube 2 can fold or stretch with the peristalsis of the intestine, and will not cause traction on the intestine, ensuring safety.

[0047] According to the technical solution of the embodiment of the utility model, the guide head 3 is fishtail-shaped, with the widest part not exceeding 12 mm, which can increase friction so that the catheter can quickly enter the small intestine. The guide head 3 is filled with absorbent material to help the small intestinal fluid enter, and at the same time can filter the food in the small intestine to prevent the outer tube 2 from being blocked by food.

[0048] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A small intestine extraction catheter, characterized in that: It comprises a supporting core tube (1), an outer tube (2) and a guide head (3), wherein: The outer tube (2) is sleeved outside the supporting core tube (1) and is axially folded in a lantern shape, and can be stretched when subjected to force; The guide head (3) is located at the first end of the outer tube (2), and the second end of the outer tube (2) is provided with an opening; The supporting core tube (1) is used to be placed in the outer tube (2) from the open end to play a supporting role; The guide head (3) is provided with a side hole (4) which is sealed with a small intestine soluble material which is insoluble in gastric acid.

2. The small intestine extraction catheter according to claim 1, characterized in that: The outer tube (2) and the guide head (3) are an integrated structure.

3. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The support core tube (1) has a diameter of 0.5-1.5 mm and a length of 500-2000 mm.

4. The small intestine extraction catheter according to claim 3, characterized in that: The outer tube (2) has a thin diameter of 0.8-2 mm and a thick diameter of 1.5-4.5 mm.

5. The small intestine extraction catheter according to claim 1 or 4, characterized in that: The length of the outer tube (2) after being stretched is 3-5 times that of the supporting core tube (1).

6. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The guide head (3) is in the shape of a fish tail.

7. The small intestine extraction catheter according to claim 6, characterized in that: The widest part of the guide head (3) in the axial direction of the outer tube (2) does not exceed 12 mm.

8. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The outer wall of the outer tube (2) is provided with a lubricating coating.

9. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The support core tube (1) has one end located inside the outer tube (2) and presents a smooth curved surface.

10. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The guide head (3) is a hollow structure.

11. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The guide head (3) is provided with an ultrasound or X-ray development structure (5).

12. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The guide head (3) is filled with water-absorbing material.

13. The small intestine extraction catheter according to claim 12, characterized in that: The water absorbing material is located in a connection channel connecting the guide head (3) to the outer tube (2).

14. The small intestine extraction catheter according to claim 1 or 2, characterized in that: The support core tube (1) is provided with a through hole at the far end, and the through hole is connected to the negative pressure generating structure.

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