Double-cavity negative pressure esophageal dilation device

Abstract

The invention relates to a double-cavity negative-pressure esophageal dilation device which comprises a stomach tube, the stomach tube is sleeved with the sleeve in a sliding mode, a drainage cavity is formed between the inner wall of the sleeve and the outer wall of the stomach tube, a drainage opening communicated with the drainage cavity is formed in the outer side wall of one end of the sleeve, a side hole communicated with the drainage cavity is formed in the outer side wall of the other end of the sleeve, and the end, close to the side hole, of the sleeve is an open end. The stomach tube can penetrate out of the opening end; and the expansion body covers the outer part of the sleeve, corresponds to the position of the side hole, and is made of a water absorption expansion material. The device has the functions of expanding the esophagus and conducting negative pressure drainage on the wound surface, the postoperative recovery effect of a patient can be remarkably improved, and the operation difficulty is low.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a double-chamber negative pressure esophageal dilation device. Background Art

[0002] Endoscopic submucosal dissection (ESD) is a standard minimally invasive treatment for patients with early esophageal cancer. Scars gradually form during the healing process of the wound after surgery, and scar traction leads to esophageal stenosis. The normal esophageal diameter is about 3.0 to 3.5 cm. After esophageal stenosis occurs, the stenosis aperture can be only a few millimeters wide, and patients experience severe dysphagia. For patients with lesions greater than or equal to 3 / 4 weeks, the risk of esophageal stenosis after ESD is very high. The usual treatment for esophageal stenosis is esophageal dilation with an esophageal dilator.

[0003] According to a Japanese study, patients with esophageal stenosis undergo dilation more than 30 times after ESD surgery, and relapse occurs after an average of 2 to 3 months. The mechanism is still the local wound repair after dilation, which leads to scar traction again and causes esophageal stenosis. Patients often need to undergo repeated esophageal dilations. The operation of esophageal dilation is relatively simple. If patients undergo esophageal dilation in the hospital, it not only wastes precious medical resources, but also brings a heavy medical burden to patients. In addition, since the wound surface is immersed in the digestive tract fluid for a long time, it is not only not conducive to wound healing, but also easy to cause wound contamination, thereby increasing the possibility of infection and even inducing life-threatening danger.

[0004] Negative pressure wound therapy is often used to treat difficult-to-heal wounds and cuts. This technology can improve the speed and quality of wound healing by promoting blood circulation in the wound, promoting the expression of various cytokines in the wound group, reducing tissue edema, and reducing the bacterial load in the wound. It can effectively promote the healing of wounds and cuts. However, because the pharynx and esophagus are deep in the body cavity, they cannot form a closed negative pressure system like surface wounds such as the skin, so negative pressure wound therapy cannot be used normally, and other methods are needed to form a negative pressure environment there.

[0005] In the prior art, for example, Chinese patent application CN105343993A discloses an esophageal dilator, including a telescopic bracket and a first esophageal dilator plate and a second esophageal dilator plate, wherein the telescopic bracket is arranged on the first esophageal dilator plate and the second esophageal dilator plate, wherein the first esophageal dilator plate is connected to a first extension rod, and the other end of the first extension rod is connected to a first handle, and the second esophageal dilator plate is connected to a second extension rod, and the other end of the second extension rod is connected to a second handle. The dilator achieves the dilation of the esophagus through the dilator plate, and does not have the function of negative pressure drainage, and cannot form a negative pressure environment on the wound surface, and requires high professionalism and is difficult to operate. Summary of the invention

[0006] In order to solve the problems existing in the above-mentioned prior art, the purpose of this application is to provide a double-chamber negative pressure esophageal dilation device. This application has the functions of dilating the esophagus and draining the wound surface with negative pressure, which can significantly improve the postoperative recovery effect of the patient and has low operation difficulty.

[0007] The double-chamber negative pressure esophageal dilation device described in the present application comprises:

[0008] Gastric tube;

[0009] A sleeve, which is slidably sleeved on the outside of the gastric tube, a drainage cavity is formed between the inner wall of the sleeve and the outer wall of the gastric tube, a drainage port communicating with the drainage cavity is formed on the outer wall of one end of the sleeve, and a side hole communicating with the drainage cavity is formed on the outer wall of the other end, and the end of the sleeve close to the side hole is an open end, so that the gastric tube can pass through the open end;

[0010] The expansion body is coated on the outside of the sleeve and corresponds to the position of the side hole. The expansion body is made of water-absorbing and expanding material.

[0011] Preferably, the gastric tube is coaxially arranged with the sleeve, and the inner wall of the sleeve extends inwardly to form a positioning protrusion, and the positioning protrusion extends to abut against the outer wall of the gastric tube.

[0012] Preferably, the number of the positioning protrusions is four, and the four positioning protrusions are distributed at equal angles around the axis of the sleeve.

[0013] Preferably, the open end of the sleeve is provided with a plurality of flaps, one end of the flap is connected to the sleeve, and the other end is a movable end, and the plurality of flaps cooperate to close the open end.

[0014] Preferably, the outer side surface of the petal is an arc surface bent toward the axis of the sleeve.

[0015] Preferably, the number of the petals is four, and the four petals are distributed at equal angles around the axis of the sleeve.

[0016] Preferably, the petal is made of elastic material, and the petal is configured so that the movable end of the petal always has a movement tendency to bend toward the axis of the sleeve.

[0017] Preferably, the double-chamber negative pressure esophageal dilation device

[0018] Also includes:

[0019] A sponge drainage tube, one end of which is connected to the drainage port, and the other end of which is used to connect to the negative pressure device.

[0020] Preferably, the inner diameter of the gastric tube is 2.0 mm to 2.1 mm, and the outer diameter is 3.23 mm to 3.38 mm; the inner diameter of the sleeve is 4.23 mm to 4.38 mm, and the outer diameter is 5.40 mm to 5.58 mm.

[0021] Preferably, the expansion body is a sponge with a thickness of 0.9 mm to 1.1 mm.

[0022] The double-chamber negative pressure esophageal dilation device described in the present application has the advantages that, by providing a gastric tube and a sleeve that are nested inside and outside, a drainage cavity is formed between the gastric tube and the sleeve, the gastric tube can supply the patient with enteral nutrition intake, the drainage cavity can be connected to an external negative pressure device for negative pressure drainage, and an expansion body is provided at the other end of the sleeve, so that the expansion body expands by absorbing liquid after entering the surgical area, plays a role in expanding the surgical area, and can cover the wound surface to effectively prevent adhesion. The drainage cavity can continuously suck out secretions, blood liquids, and refluxed gastric contents in the surgical area through the negative pressure effect, keep the wound surface relatively dry and clean, provide a more favorable growth environment for the wound surface, and help to improve the patient's postoperative recovery speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic cross-sectional structure diagram of a double-chamber negative pressure esophageal dilation device described in the present application;

[0024] Figure 2 It is one of the structural schematic diagrams of the opening end of the sleeve described in the present application (petal closed state);

[0025] Figure 3 This is the second structural schematic diagram of the opening end of the sleeve described in the present application (petals are in the open state);

[0026] Figure 4 It is a schematic diagram of the matching structure of the sleeve and the stomach tube described in the present application;

[0027] Figure 5 yes Figure 4 sectional view of .

[0028] Explanation of the reference numerals: 1 - gastric tube, 2 - sleeve, 21 - drainage cavity, 22 - drainage port, 23 - positioning protrusion, 3 - expansion body, 4 - flap, 5 - sponge drainage tube. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, a double-chamber negative pressure esophageal dilation device described in the present application comprises:

[0030] The stomach tube 1 is an oblong tube structure made of plastic material, with a hollow middle portion for supplying enteral nutrition to the patient.

[0031] Sleeve 2 is made of the same plastic material as the gastric tube 1. The inner diameter of the sleeve 2 is larger than the outer diameter of the gastric tube 1, so that the sleeve 2 can be sleeved on the outside of the gastric tube 1 and form a sliding fit with the gastric tube 1. The gastric tube 1 can slide along its axial direction in the sleeve 2. A hollow compartment is formed between the inner wall of the sleeve 2 and the outer wall of the gastric tube 1. The cavity is a drainage cavity 21 for negative pressure drainage. A drainage port 22 communicating with the drainage cavity 21 is formed on the outer wall at one end of the sleeve 2, and the liquid flows out of the drainage cavity 21 through the drainage port 22. The other end of the sleeve 2 is an open end, and a side hole communicating with the drainage cavity 21 is provided on the side wall of the sleeve 2 near the open end.

[0032] The expansion body 3 is coated on the outside of the sleeve 2 and connected to the sleeve 2 by adhesive. The position of the expansion body 3 corresponds to the position of the side hole. The expansion body 3 can absorb the liquid in the sleeve 2. After absorbing the liquid, the expansion body 3 expands and its volume becomes larger to dilate the surgical area.

[0033] Further, in this embodiment, please refer to Figure 4 , Figure 5 The gastric tube 1 is coaxially arranged with the sleeve 2, and the inner wall of the sleeve 2 extends inward to form a positioning protrusion 23, which extends to abut against the outer wall of the gastric tube 1. More specifically, the positioning protrusion 23 is in the shape of an elongated strip, and there are four of them. The four positioning protrusions 23 are distributed at equal angles around the axis of the sleeve 2, and the thickness of the four positioning protrusions 23 is equal. The four positioning protrusions 23 can maintain a coaxial structure with the sleeve 2 to form a drainage cavity 21, and can maintain the freedom of relative sliding movement.

[0034] Further, in this embodiment, please refer to Figure 2 , Figure 3 The open end of the sleeve 2 is provided with a plurality of petals 4, one end of the petal 4 is connected to the sleeve 2, and the other end is a movable end. The plurality of petals 4 cooperate to close the open end. More specifically, the petal 4 is an arc surface bent toward the axial position of the sleeve 2, that is, the plurality of petals 4 cooperate to make the open end position of the sleeve 2 a spherical surface, and the diameter gradually decreases in the direction away from the open end, so that the sleeve 2 can be easily placed in the surgical area.

[0035] Furthermore, in this embodiment, the number of petals 4 is four, and the four petals 4 are arranged at equal angles around the axis of the sleeve 2. The petals 4 are made of elastic material, such as elastic plastic, and the petals 4 are arranged so that the movable ends of the petals 4 always have a tendency to bend toward the axis of the sleeve 2, that is, when the petals 4 are not subjected to external forces, the movable ends of the petals 4 are all close to the center position, so that the open end is normally in a state as shown in FIG. Figure 2In the closed state shown, when the stomach tube 1 is pushed forward, the stomach tube 1 moves forward along the axial direction, opens the flap 4, and opens the open end. When the stomach tube 1 gradually moves to pass through the flap 4, the flap 4 recovers its deformation due to its own elastic force and moves closer to the center position, as shown in FIG. Figure 3 As shown, at this time, the flaps 4 will cling to the outer wall of the gastric tube 1, and the flaps 4 cooperate to play a role similar to a clamp to fix the gastric tube 1, so that the gastric tube 1 and the sleeve 2 maintain a certain tightness. At this time, without being pulled / pushed by a large external force, the gastric tube 1 and the sleeve 2 will remain relatively still, which is conducive to maintaining the stability of the expanded esophageal tube fixed at the affected area and reducing the risk of adverse effects on the patient due to relative displacement of the gastric tube 1 and the sleeve 2.

[0036] In this embodiment, movable and elastic flaps 4 are provided so that the flaps 4 are in a closed state under normal conditions, and the outer surface is a smooth spherical surface, which is convenient for insertion into the surgical area and can reduce the pain of insertion. The flaps 4 can play a certain role in fixing the gastric tube 1 after the gastric tube 1 is expanded, effectively reducing the relative displacement of the gastric tube 1 and the sleeve 2, and being more conducive to the patient's postoperative recovery.

[0037] Furthermore, in this embodiment, the double-chamber negative pressure esophageal dilation device further includes:

[0038] The sponge drainage tube 5 has one end connected to the drainage port 22 and the other end connected to the negative pressure device. The sponge drainage tube 5 can be connected to the negative pressure device for drainage. Specifically, the two ends of the sponge drainage tube 5 connected to the sleeve 2 are sealed to avoid pressure release, ensuring that the sponge drainage tube 5 can form a negative pressure environment in the drainage cavity 21 after being connected to the negative pressure device.

[0039] Furthermore, in this embodiment, the inner diameter of the stomach tube 1 is 2.0 mm to 2.1 mm, the outer diameter is 3.23 mm to 3.38 mm, and the length is 1160 mm; the inner diameter of the sleeve 2 is 4.23 mm to 4.38 mm, and the outer diameter is 5.40 mm to 5.58 mm.

[0040] Furthermore, in this embodiment, the expansion body 3 is a sponge with a thickness of 0.9 mm to 1.1 mm. The thickness after swelling by absorbing water is about 3 mm, which can effectively expand the surgical area and cover the wound surface.

[0041] The following will combine the above content to fully explain the use process of the double-chamber negative pressure esophageal dilation device of this embodiment:

[0042] 1. After esophageal stricture dilatation or minimally invasive esophageal surgery completes lesion resection, a double-chamber negative pressure esophageal dilator is inserted through the nose.

[0043] 2. Place the double-lumen negative pressure esophageal dilation device into the esophagus under gastroscopy and observe whether the end of the tube reaches the stenosis or the surgical area under gastroscopy.

[0044] 3. After reaching the designated position, the expansion body 3 is just in the surgical area, pulling the sponge drainage tube 5 to fix the outer wall of the sleeve 2, and the stomach tube 1 breaks through the end of the sleeve 2 and is sent further forward (such as Figure 3 and enter the stomach body.

[0045] 4. Fix the sleeve 2 and the gastric tube 1 respectively, fix the outer wall of the sleeve 2, so that the expansion body 3 can accurately support and treat the surgical area; fix the gastric tube 1 to prevent the gastric tube 1 from falling off.

[0046] 5. Connect the sponge drainage tube 5 to a portable negative pressure suction device, and the continuous negative pressure suction force is 40 kPa. The gastric tube 1 can be used to supply enteral nutrition.

[0047] The present application forms a drainage cavity 21 between the gastric tube 1 and the sleeve 2 by setting up the gastric tube 1 and the sleeve 2 nested inside and outside. The gastric tube 1 can provide the patient with enteral nutrition intake, and the drainage cavity 21 can be connected to the external negative pressure device for negative pressure drainage. By setting the expansion body 3 at the other end of the sleeve, the expansion body 3 expands by absorbing liquid after entering the surgical area, plays the role of expanding the surgical area, and can cover the wound surface to effectively prevent adhesion. The expansion body 3 can continuously suck out the secretions, blood liquid and refluxed gastric contents of the surgical area through the drainage cavity 21 through the negative pressure effect, keep the wound surface relatively dry and clean, provide a more favorable growth environment for the wound surface, and help to improve the patient's postoperative recovery speed.

[0048] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application.

[0049] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of this application.

Claims

1. A double-chamber negative pressure esophageal dilation device, characterized in that: include: Gastric tube; A sleeve, which is slidably sleeved on the outside of the gastric tube, a drainage cavity is formed between the inner wall of the sleeve and the outer wall of the gastric tube, a drainage port communicating with the drainage cavity is formed on the outer wall of one end of the sleeve, and a side hole communicating with the drainage cavity is formed on the outer wall of the other end, and the end of the sleeve close to the side hole is an open end, so that the gastric tube can pass through the open end; The expansion body is coated on the outside of the sleeve and corresponds to the position of the side hole. The expansion body is made of water-absorbing and expanding material.

2. The double-chamber negative pressure esophageal dilation device according to claim 1, characterized in that: The stomach tube is coaxially arranged with the sleeve, and the inner wall of the sleeve extends inwardly to form a positioning protrusion, and the positioning protrusion extends to abut against the outer wall of the stomach tube.

3. The double-chamber negative pressure esophageal dilation device according to claim 2, characterized in that: The number of the positioning protrusions is four, and the four positioning protrusions are distributed at equal angles around the axis of the sleeve.

4. The double-chamber negative pressure esophageal dilation device according to claim 1, characterized in that: The opening end of the sleeve is provided with a plurality of petals, one end of the petal is connected to the sleeve, and the other end is a movable end, and the plurality of petals cooperate to close the opening end.

5. The double-chamber negative pressure esophageal dilation device according to claim 4, characterized in that: The outer side surface of the petal is an arc surface bent toward the axis of the sleeve.

6. The double-chamber negative pressure esophageal dilation device according to claim 4 or 5, characterized in that: The number of the petals is four, and the four petals are distributed at equal angles around the axis of the sleeve.

7. The double-chamber negative pressure esophageal dilation device according to claim 4 or 5, characterized in that: The petal is made of elastic material, and the petal is arranged so that the movable end of the petal always has a movement tendency of bending toward the axis of the sleeve.

8. The double-chamber negative pressure esophageal dilation device according to claim 1, characterized in that: Also includes: A sponge drainage tube, one end of which is connected to the drainage port, and the other end of which is used to connect to the negative pressure device.

9. The double-chamber negative pressure esophageal dilation device according to claim 1, characterized in that: The inner diameter of the stomach tube is 2.0 mm to 2.1 mm, and the outer diameter is 3.23 mm to 3.38 mm; the inner diameter of the sleeve is 4.23 mm to 4.38 mm, and the outer diameter is 5.40 mm to 5.58 mm.

10. The double-chamber negative pressure esophageal dilation device according to claim 1 or 9, characterized in that: The expansion body is a sponge with a thickness of 0.9 mm to 1.1 mm.

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