Traction device, control method and capsule endoscope

Abstract

The application discloses a traction device, comprising a positive and negative pressure device, a luer joint, and a detachable traction line, wherein the detachable traction line further comprises a silica gel suction cup, a silica gel tube and a conical head connected in sequence, the detachable traction line is the silica gel tube, the Shore hardness of which is 40-60, the inner surface area of the silica gel suction cup is divided into a frosted surface and a smooth surface, the frosted surface area is arranged on the inner side wall of the silica gel suction cup close to the end side of the silica gel suction cup, and the smooth surface area is arranged adjacent to the frosted surface area, and the application further provides a control method, which can effectively control the movement of a capsule endoscope in an esophagus, can freely control the observation angle of the capsule endoscope, and overcomes the shortcomings of a short stay time of the capsule endoscope in the esophagus, a low missed detection rate, a single observation angle, a complicated assembly and a difficult disassembly, and the like, and has the advantages of simple structure, low cost, convenient use, improved inspection speed and disease detection rate, and enhanced product competitiveness.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a traction device, a control method, and a capsule endoscope thereof. Background Technology

[0002] In the field of capsule endoscopy-assisted examination, the examination of the esophagus is currently quite difficult, mainly due to the special structure of the esophagus. After the capsule endoscope enters the esophagus, the time it stays there is very short, making it difficult to capture valuable images.

[0003] A new type of traction capsule endoscope has emerged on the market. It uses a silicone suction cup and traction rope at one end of the existing capsule endoscope to control the speed of the capsule endoscope. This silicone suction cup has a smooth surface and fits into the end of the capsule endoscope. Because both the silicone suction cup and the end of the capsule endoscope are smooth, the silicone suction cup is attracted to the end of the capsule endoscope before it is fully assembled. This assembly process causes many defects, including incomplete assembly, air leakage from the suction cup that cannot be released, insufficient suction force and detachment. In some cases, an air pump is even needed to attract and release the capsule endoscope during clinical examinations, which causes great inconvenience to the examinee.

[0004] Chinese patent application No. 2014101526014 discloses a flexible-wire traction capsule endoscope and its manufacturing method. It mainly includes a capsule endoscope, which is housed in a bag-like body and leads out a traction flexible wire. The manufacturing method includes the steps of mold integration, film protection, attachment, shaping, assembly, sealing and threading. The flexible-wire traction capsule endoscope of this invention is manufactured by processing a bag-like body and using it to assemble with a traditional capsule endoscope. Finally, the endoscope is sealed and threaded to produce the finished product.

[0005] Chinese patent application number 2012103004768 discloses a releasable and magnetically controllable thin-tube capsule endoscope, including a syringe, a thin tube, a vacuum suction cup, and a capsule endoscope. One end of the thin tube is connected to the syringe, and the other end is connected to the vacuum suction cup. This technical solution controls the speed at which the capsule endoscope passes through the esophagus through the thin tube and the vacuum suction cup, and can freely control the observation angle of the capsule endoscope.

[0006] Due to the shortcomings of existing technology, in order to provide sufficient suction for capsule endoscopes, the industry has adopted methods such as increasing the outer diameter of the silicone suction cup, increasing the wall thickness, or using a dual-purpose air pump to improve the suction force. However, increasing the outer diameter and wall thickness of the silicone suction cup often brings new problems to the patient, such as difficulty in swallowing, operation, and carrying.

[0007] Therefore, it is necessary to develop a traction capsule endoscope that can significantly improve testing speed and disease detection rate, adapt to the special structure of the esophagus, has a simple structure, is inexpensive, and is easy to use, so as to contribute to a healthy China. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a traction device, a control method, and a capsule endoscope.

[0009] In a first aspect, the present invention provides a traction device, including a positive and negative pressure device, a Luer connector, and a detachable traction line, wherein the detachable traction line further includes a silicone suction cup, a silicone tube, and a conical head connected in sequence.

[0010] Furthermore, the separable traction wire is a silicone tube with a Shore hardness of 40°-60°.

[0011] Furthermore, the silicone suction cup, silicone tube, and conical head of the separable traction line are integrally formed.

[0012] Furthermore, the silicone tube is a hollow tube with an outer diameter of 1.0~1.5mm and an inner diameter of 0.5~1.0mm.

[0013] Furthermore, the surface of the silicone tube is provided with silkscreened scales, with the silicone suction cup as the dot. The initial scale is defined at a distance of 150mm to 200mm from the silicone suction cup, and the scale can be either a bar or a dot.

[0014] Furthermore, the positive and negative pressure device is provided with an inner cavity, and the inner cavity is further provided with an opening and closing valve. The positive and negative pressure device is also provided with a mechanism to increase or decrease the pressure in the inner cavity.

[0015] Furthermore, the mechanism is either a piston that compresses the inner cavity or a soft, compressible balloon.

[0016] Furthermore, the outer surface of the separable traction wire is coated with a hydrophilic coating.

[0017] Furthermore, the traction device is connected to the capsule endoscope, and the wall thickness on one side is 0.20mm-0.35mm. The interference fit between the silicone suction cup and the capsule endoscope is 0.2mm-0.35mm.

[0018] Furthermore, the inner surface area of ​​the silicone suction cup is divided into a frosted surface and a smooth surface. The frosted surface area is located on the inner side wall of the silicone suction cup near the end of the silicone suction cup, and the smooth surface area is arranged adjacent to the frosted surface area. The roughness of the frosted surface is Ra0.6~3.2um, and the ratio of the length L1 of the frosted surface area to the length L2 of the smooth surface area is 0.5 < L1 / L2 < 3.

[0019] In a second aspect, the present invention provides a capsule endoscope, wherein the capsule endoscope is controlled by any one of the traction devices of claims 1-10.

[0020] Thirdly, the present invention provides a control method, including a capsule endoscope and a traction device, comprising the following steps:

[0021] Open the built-in valve of the positive and negative pressure device, and the silicone suction cup that can separate the traction line is sealed to the tail of the capsule endoscope;

[0022] After closing the valves of the positive and negative pressure devices, the silicone suction cup continues to slide further toward the lens side of the capsule endoscope, guiding the smooth area of ​​the silicone suction cup to fit against the smooth surface of the capsule endoscope, thus achieving a sealed connection.

[0023] The capsule endoscope tail, the inner cavity of the silicone tube, and the positive and negative pressure devices together form a sealed cavity. The silicone suction cup firmly adheres to the capsule endoscope. The patient swallows the capsule endoscope through the mouth and it enters the esophagus. By controlling the length of the detachable traction wire outside the body, the capsule endoscope can be moved in the esophagus at the expected speed.

[0024] Fourthly, the present invention provides a control method, including a capsule endoscope and a traction device, comprising the following steps:

[0025] Connect the Luer connector on the conical head of the detachable traction wire to the syringe of the positive and negative pressure device, and push the piston of the syringe downward;

[0026] The capsule endoscope moves downwards into the next segment of the digestive tract until it is expelled from the body.

[0027] This invention controls the speed at which the capsule endoscope passes through the esophagus by using a separable traction wire 3 and a silicone suction cup 3a, as well as the frosted and smooth surfaces of their inner walls. It also allows for free control of the capsule endoscope's observation angle. This overcomes the shortcomings of capsule endoscopes, such as short residence time in the esophagus, low false negative rate, limited observation angle, cumbersome assembly, and difficult disassembly. The invention features a simple structure, low cost, and ease of use, effectively improving testing speed and disease detection rate, enhancing product competitiveness, and solving practical problems such as insufficient professional doctors, lack of equipment, and difficulty in carrying out digestive endoscopy work in primary hospitals. Attached Figure Description

[0028] Figure 1 : Schematic diagram of the composition of the traction capsule endoscope system of the present invention.

[0029] Figure 2 : Schematic diagram of the traction device of the present invention.

[0030] Figure 3 : Schematic diagram of the silkscreened scale of the detachable traction wire.

[0031] Figure 4 Schematic diagram of silicone suction cup structure.

[0032] Figure 5 : Schematic diagram of a capsule endoscope with traction wire adsorption.

[0033] Figure 6: Schematic diagram of the traction wire detaching from the capsule endoscope.

[0034] The serial numbers and their corresponding names are as follows: positive and negative pressure device 1, Luer connector 2, separable traction line 3, capsule endoscope 4, silicone suction cup 3a, silicone tube 3b, conical head 3c, frosted surface 301, smooth surface 302, adsorption force F1, negative pressure F2, gravity F3, expansion force F4, separation force F5. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Please refer to Figure 1 A schematic diagram of the traction-type capsule endoscope system of the present invention includes a positive and negative pressure device 1, a Luer connector 2, a separable traction wire 3, and a capsule endoscope 4. The separable traction wire 3 is a non-toxic, flexible, and stable food-grade silicone tube with a Shore hardness of 40°-60°. Further reference... Figure 2 The schematic diagram of the traction device of the present invention shows that the separable traction line 3 is composed of a silicone suction cup 3a, a silicone tube 3b and a conical head 3c connected in sequence, or it can be directly integrally formed. The conical head 3c is further connected to the syringe of the positive and negative pressure device 1 after being assembled with the Luer connector 2. The silicone tube 3b is a hollow tube with an outer diameter of 1.0~1.5mm and an inner diameter of 0.5~1.0mm, and its two ends are respectively connected to the conical head 3c and the silicone suction cup 3a.

[0037] Further reference Figure 3 The schematic diagram of the detachable traction wire of the present invention shows that the surface of the silicone tube 3b is provided with silk screen scales. The scales are based on the silicone suction cup 3a as the dot. The initial scale is defined at a distance of 150~200mm from the silicone suction cup 3a. The scales can be in the shape of strips, dots, etc. A set of scales is set at a certain distance. Each set of scales can be set with a different number of strips or dots to represent different lengths, or different colors can be set to represent different lengths.

[0038] Furthermore, the positive and negative pressure device 1 is provided with an inner cavity, and the inner cavity is provided with an opening and closing valve. The positive and negative pressure device 1 is also provided with a mechanism to increase or decrease the pressure in the inner cavity, such as a piston compressing the inner cavity, a soft compressible balloon, etc.

[0039] Furthermore, the outer surface of the separable traction wire 3 is coated with a hydrophilic coating, making the traction wire move more smoothly in the esophagus.

[0040] The capsule endoscope mainly includes a camera part and a magnetic head control part, wherein the magnetic head control part is located at the tail end of the capsule endoscope. This is a conventional setting for those skilled in the art, and will not be described in detail here.

[0041] Specifically, the silicone suction cup 3a has an inner diameter of 11.5 mm and a single-sided wall thickness of 0.20 mm to 0.35 mm, while the capsule endoscope 4 has an outer diameter of 12 mm. Therefore, the silicone suction cup 3a and the capsule endoscope 4 have an interference fit, with an interference amount of 0.2 mm to 0.35 mm. Furthermore, the inner surface area of ​​the silicone suction cup 3a is divided into a frosted surface 301 and a smooth surface 302. The frosted surface area is located on the inner wall near the end of the silicone suction cup 3a, while the smooth surface area is adjacent to the frosted surface area. The roughness of the frosted surface is Ra 0.6~3.2um. The ratio of the length L1 of the frosted area to the length L2 of the smooth area is 0.5 < L1 / L2 < 3. The frosted surface 301 adsorbs the outer surface of the capsule endoscope 4. After the silicone suction cup 3a is inflated, the frosted surface 301 is more easily detached from the capsule endoscope 4. The smooth surface 302 adsorbs the remaining capsule endoscope surface, generating sufficient adsorption force. Therefore, the capsule endoscope 4 and the silicone suction cup 3a generate sufficient contact surface and adsorption force.

[0042] Further reference Figure 4 Schematic diagram of the silicone suction cup structure of the present invention. Figure 5 A schematic diagram of the traction wire adsorption capsule endoscope. When examining the digestive tract, first open the valve of the positive and negative pressure device 1. The silicone suction cup 3a of the detachable traction wire 3 is then sealed and connected to the tail end of the capsule endoscope 4. Next, close the valve of the positive and negative pressure device 1. Because the silicone suction cup 3a has a frosted area and a smooth area, when the silicone suction cup 3a connects to the tail end of the capsule endoscope, the frosted area contacts the tail end of the capsule endoscope first. The friction between the frosted area and the smooth surface of the capsule endoscope is small, facilitating a smooth connection to the tail end of the capsule endoscope. The silicone suction cup 3a further moves towards the lens of the capsule endoscope 4. The device continues to slide sideways, guiding the smooth surface of the silicone suction cup 3a to form a certain length of contact with the smooth surface of the capsule endoscope, achieving a sealed connection. At this point, the tail of the capsule endoscope, the inner cavity of the silicone tube 3b, and the positive and negative pressure device 1 together form a sealed cavity. The capsule endoscope is firmly adsorbed by the silicone suction cup 3a. The patient swallows the traction capsule endoscope of this invention through the mouth and it enters the esophagus. The doctor controls the length of the separable traction wire 3 outside the body to make the capsule endoscope move in the esophagus at the expected speed. The capsule endoscope is used to view the structure of the digestive tract mucosa and its lesions. The operation process is simple and easy.

[0043] Specifically, the silicone suction cup 3a of the separable traction line 3 is inserted into the tail of the capsule endoscope 4. At this time, the smooth surface 302 of the inner wall of the silicone suction cup 3a and the smooth outer wall of the tail of the capsule endoscope 4 generate an adsorption force F1. The smooth surface 302 is in close contact with the outer surface of the capsule endoscope, and a vacuum is formed in the cavity inside the silicone suction cup 3a, generating an upward negative pressure F2. The capsule endoscope 4 generates a vertical downward gravity F3. Since the capsule endoscope 4 is small in size and light in weight, the adsorption force F1 is much greater than the gravity F3 of the capsule endoscope. At this time, the separable traction line 3 and the capsule endoscope 4 are sent into the patient's oral cavity together. The operator pulls one end of the conical head 3c of the separable traction line 3 from outside the body and gradually releases the separable traction line 3 to allow the capsule endoscope 4 to slowly pass through the esophagus for examination of the digestive tract. This overcomes the shortcomings of the capsule endoscope 4, such as short residence time in the esophagus, high missed detection rate, and single observation angle.

[0044] Further reference Figure 6 A schematic diagram of the traction wire detaching from the capsule endoscope. After a complete examination of the esophagus, the operator connects the Luer connector 2 on the conical head 3c at the other end of the separable traction wire 3 to the syringe of the positive and negative pressure device 1, and pushes the piston of the syringe 1 downward. The internal cavity of the silicone suction cup 3a is inflated, and the pressure increases. The expansion force F4 generated by the inner wall of the silicone suction cup 3a is greater than the external pressure. The frosted surface 301 of the inner wall of the silicone suction cup 3a and the smooth surface 302 of the capsule endoscope 4 generate a separation force F5. Under the action of airflow and gravity F3, the capsule endoscope 4 moves downward into the next section of the human digestive tract until it is expelled from the body.

[0045] This invention controls the speed at which the capsule endoscope passes through the esophagus by using a separable traction wire 3 and a silicone suction cup 3a, as well as the frosted and smooth surfaces of their inner walls. It also allows for free control of the capsule endoscope's observation angle. This overcomes the shortcomings of capsule endoscopes, such as short residence time in the esophagus, low false negative rate, limited observation angle, cumbersome assembly, and difficult disassembly. The invention features a simple structure, low cost, and ease of use, effectively improving testing speed and disease detection rate, enhancing product competitiveness, and solving practical problems such as insufficient professional doctors, lack of equipment, and difficulty in carrying out digestive endoscopy work in primary hospitals.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A traction device, characterized in that, The system includes a positive and negative pressure device, a Luer connector, and a detachable traction cable. The detachable traction cable comprises a silicone suction cup, a silicone tube, and a conical head connected in sequence. These three parts are integrally formed. The silicone tube has a Shore hardness of 40°-60°. The positive and negative pressure device has an inner cavity, further equipped with an opening and closing valve. The device also includes a mechanism to increase or decrease the pressure within the inner cavity. This mechanism can be either a piston compressing the inner cavity or a soft, compressible balloon. The traction device connects to the capsule. The endoscope has a silicone suction cup with a single-sided wall thickness of 0.20mm-0.35mm. The interference fit between the silicone suction cup and the capsule endoscope is 0.2mm-0.35mm. The inner surface of the silicone suction cup is divided into a frosted surface and a smooth surface. The frosted surface is located on the inner side wall of the silicone suction cup near the end of the suction cup. The smooth surface is adjacent to the frosted surface. The roughness of the frosted surface is Ra 0.6~3.2um. The ratio of the length L1 of the frosted surface to the length L2 of the smooth surface is 0.5 < L1 / L2 < 3.

2. The traction device as described in claim 1, characterized in that, The silicone tube is a hollow tube with an outer diameter of 1.0~1.5mm and an inner diameter of 0.5~1.0mm.

3. The traction device as described in claim 1, characterized in that, The surface of the silicone tube is provided with silkscreened scales, with the silicone suction cup as the dot. The initial scale is defined at a distance of 150mm to 200mm from the silicone suction cup, and the scale can be either a bar or a dot.

4. The traction device as described in claim 1, characterized in that, The outer surface of the separable traction wire is coated with a hydrophilic coating.

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