A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation

Abstract

The present invention discloses a flexible catheter device that can realize synchronous suction and injection of medicine through endoscopic operation, including an outer sheath tube and a hollow sheath tube, the hollow sheath tube is sleeved in the outer sheath tube and the two ends extend out of the outer sheath tube, the hollow sheath tube slides inside the outer sheath tube, and the length of the protruding part of the front end of the hollow sheath tube is adjusted by sliding; a flexible metal main body rod is inserted in the hollow sheath tube, and the flexible metal main body rod is used to break through the wall of the bulla; the outer sheath tube and the hollow sheath tube together constitute the outer side wall of the entire flexible catheter device, and the outer side wall is divided into a head section, a middle section and a tail screw section with the flexible metal main body rod as the axis; the tail end of the hollow sheath tube is connected to the tail syringe suction interface, and the syringe interface of the tail syringe suction interface is connected to the hollow lumen of the hollow sheath tube to realize the suction or injection function. The present invention can realize synchronous suction and synchronous injection of adhesion-causing related drugs, avoid multi-channel operation, and is safe and efficient, clinically practical, and easy to use.

Description

Technical Field

[0001] The invention belongs to the technical field of disposable medical devices, and in particular relates to a flexible catheter device capable of realizing synchronous suction and drug injection through endoscopic operation. Background Art

[0002] Chronic obstructive pulmonary disease is a common and frequently occurring disease of the respiratory system, which brings a heavy health economic burden to the world. The disease can cause inhomogeneous emphysema with giant bullae, leading to a serious decline in the patient's lung function, and even inducing acute complications such as pneumothorax, infection, and respiratory failure. It is one of the complex structural lung lesions that is extremely difficult to treat clinically. Traditional treatment methods are mainly surgical operations, but in clinical practice, only a small number of people have the opportunity to undergo surgical resection. Most patients find it difficult to undergo surgery due to various reasons such as poor general condition, low lung function, and combined respiratory failure.

[0003] In recent years, with the vigorous development of endoscopic technology, respiratory endoscopy technology, especially medical thoracoscopy technology, has brought treatment opportunities to this group of people who cannot undergo surgical operations. One of the endoscopic treatment methods is to insert a catheter into the bulla, aspirate gas to reduce the volume of the bulla and collapse it, and then perform adhesion treatment (such as adhesive injection). However, endoscopy is often based on single-port treatment. The secondary injection of adhesives after aspiration often has poor adhesion occlusion effects because the bulla has begun to expand. If single-port synchronous aspiration and synchronous injection of adhesives can be achieved, the efficiency and success rate of bullous lung volume reduction can be greatly improved.

[0004] Therefore, in order to achieve a single-port approach in a single operation, it is urgent to design a flexible catheter device for bullous lung volume reduction that can be operated through the endoscopic working channel and achieve synchronous suction and injection of drugs, so as to achieve synchronous suction and injection of adhesion-causing drugs and avoid multi-port operation. It has the advantages of safety, high efficiency, strong clinical practicality, easy to use, and quick and easy operation. Summary of the invention

[0005] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a flexible catheter device that can achieve synchronous suction and injection through endoscopic operation, which can perform minimally invasive interventional treatment of bullae through the endoscopic working channel, and realize endoscopic bullae lung volume reduction surgery with synchronous suction and injection, which has the characteristics of easy training, easy operation, high success rate, low recurrence rate and high safety.

[0006] The technical solution adopted by the present invention is:

[0007] A flexible catheter device capable of realizing synchronous suction and drug injection through endoscopic operation, characterized in that it comprises an outer sheath tube (1) and a hollow sheath tube (2), wherein the hollow sheath tube (2) is sleeved inside the outer sheath tube (1) and both ends extend out of the outer sheath tube (1), and the hollow sheath tube (2) slides inside the outer sheath tube (1), and the length of the protruding portion of the front end of the hollow sheath tube (2) is adjusted by sliding;

[0008] A flexible metal main body rod (3) is inserted into the hollow sheath tube (2), and the flexible metal main body rod (3) is used to break through the wall of the bulla;

[0009] The outer sheath tube (1) and the hollow sheath tube (2) together constitute the outer wall of the entire flexible catheter device, and the outer wall is divided into three sections with the flexible metal main body rod as the axis, namely, a head section, a middle section and a tail screw section;

[0010] The tail end of the hollow sheath tube (2) is connected to the tail syringe suction interface (8), and the syringe interface of the tail syringe suction interface (8) is connected to the hollow lumen of the hollow sheath tube (2) to achieve suction or injection functions.

[0011] Furthermore, the head section is gradually tapered in a shallow funnel shape, and the end of the head section is completely in contact with the hollow sheath tube (2);

[0012] There is a gap between the middle section and the hollow sheath tube (2), and side holes for suction are provided on both sides of the middle section near the head section; the tail screw section is connected to a first spiral fixing device (4), and the spiral fixing device (4) is connected to a side syringe suction interface (7), and the side syringe suction interface (7) is connected to the gap between the middle section and the hollow sheath tube (2) to realize the side hole suction function; the tail of the side syringe suction interface (7) is connected to a second spiral fixing device (5) to adjust the length of the hollow sheath tube (2) extending from the head section of the outer sheath tube (1) and realize the fixing function.

[0013] Furthermore, the tail of the flexible metal main body rod (3) is connected and fixed to the hollow sheath tube (2) via a spiral device (6), and the tip breakthrough portion of the flexible metal main body rod (3) protrudes from the hollow sheath tube (2). When the spiral device (6) is released, the flexible metal main body rod (3) can be completely pulled out of the hollow sheath tube (2).

[0014] Furthermore, it also includes a second spiral fixing device (5) for connecting the side syringe suction interface (7) and the spiral device (6). When the screw mouth of the second spiral fixing device (5) is loosened, the spiral device (6) can pull the hollow sheath tube (2) to slide inside the outer sheath tube (1), thereby adjusting the length of the protruding part of the hollow sheath tube (2). At the same time, the length of the protruding part of the hollow sheath tube (2) is fixed by tightening the second spiral fixing device (5).

[0015] Furthermore, the outer diameter of the head section is 2.0 mm, the inner diameter of the head section is 1.8 mm, the outer diameter of the middle section is 2.8 mm, and the inner diameter of the middle section is 2.5 mm.

[0016] Furthermore, the overall thickness of the hollow sheath tube (2) is uniform, with an outer diameter of 1.7 mm and an inner diameter of 1.5 mm.

[0017] Furthermore, the flexible metal main rod (3) is a solid structure with an outer diameter of 1.4 mm and a sharp portion at the head end of 8 mm in length.

[0018] Furthermore, the total length of the flexible metal main rod (3) is longer than the total length of the hollow sheath tube (2).

[0019] Furthermore, the gap between the middle section and the hollow sheath tube (2) is 0.7 mm.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The present invention is suitable for thoracoscopic or bronchoscopic bullous lung volume reduction surgery, can achieve synchronous suction and injection of adhesion agents and other related drugs, avoid multi-channel operation, is safe and efficient, has strong clinical practicality, short training cycle, is easy to use, and is quick and easy to operate.

[0022] 2. The innovative design of the present invention realizes synchronous suction and synchronous injection, achieves single-shot single-hole operation, and improves the success rate of reducing adhesions of bullae. It can be applied to some patients with complex and difficult bullae or those with poor general conditions who are not suitable for surgical operations. It is safe and efficient.

[0023] 3. The present invention simplifies the existing operation process of endoscopic bullous lung volume reduction, reduces the difficulty of operation, shortens the operator's learning curve for complex bullous lung volume reduction surgery, reduces the original learning cost of the technology, is more conducive to extensive promotion and learning, and is beneficial to clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall outer wall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the present invention with a main rod.

[0026] Figure 3 The internal structure of the present invention is shown in FIG. Figure 1 .

[0027] Figure 4 The internal structure of the present invention is shown in FIG. Figure 2 .

[0028] Figure 5 It is a schematic structural diagram of the spiral fixing device of the present invention. DETAILED DESCRIPTION

[0029] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] The present invention will be described in detail below in conjunction with exemplary embodiments with reference to the accompanying drawings.

[0032] refer to Figures 1 to 5 A flexible catheter device capable of realizing synchronous suction and drug injection through endoscopic operation, comprising: an outer sheath tube 1 and a hollow sheath tube 2, wherein the hollow sheath tube 2 is sleeved inside the outer sheath tube 1 and both ends extend out of the outer sheath tube 1, so that the hollow sheath tube 2 slides inside the outer sheath tube (1), and the length of the extended portion of the front end of the hollow sheath tube 2 is adjusted by sliding; a flexible metal main body rod 3 is inserted inside the hollow sheath tube 2 to break through the wall of the bulla;

[0033] The outer sheath tube 1 and the hollow sheath tube 2 together constitute the outer wall of the entire flexible catheter device, and the outer wall is divided into three sections with the flexible metal main body rod as the axis, namely the head section, the middle section and the tail screw section;

[0034] The tail end of the hollow sheath tube 2 is connected to the tail syringe suction interface 8, and the syringe interface of the tail syringe suction interface 8 is connected to the hollow lumen of the hollow sheath tube 2 to achieve the suction or injection function.

[0035] In one embodiment, the head section tapers into a shallow funnel shape, and the end of the head section is completely in contact with the hollow sheath tube 2;

[0036] There is a gap between the middle section and the hollow sheath tube 2, and side holes for suction are opened on both sides of the middle section near the head section; the tail screw section is connected to the first spiral fixing device 4, the spiral fixing device 4 is connected to the side syringe suction interface 7, and the side syringe suction interface 7 is connected to the gap between the middle section and the hollow sheath tube 2 to realize the side hole suction function; the tail of the side syringe suction interface 7 is connected to the second spiral fixing device 5 to adjust the length of the hollow sheath tube 2 extending from the head section of the outer sheath tube 1 and realize the fixing function.

[0037] In one embodiment, the tail end of the flexible metal main body rod 3 is connected and fixed to the hollow sheath tube 2 via a spiral device 6, and the tip breakthrough portion of the flexible metal main body rod 3 protrudes out of the hollow sheath tube 2. By loosening the spiral device 6, the flexible metal main body rod 3 can be completely pulled out of the hollow sheath tube 2.

[0038] In one embodiment, it also includes a second spiral fixing device 5 for connecting the side syringe suction interface 7 and the spiral device 6. When the screw mouth of the second spiral fixing device 5 is loosened, the spiral device 6 can pull the hollow sheath tube 2 to slide inside the outer sheath tube 1, thereby adjusting the length of the protruding part of the hollow sheath tube 2. At the same time, the length of the protruding part of the hollow sheath tube 2 is fixed by tightening the second spiral fixing device 5.

[0039] In one embodiment, the outer diameter of the head section is 2.0 mm, the inner diameter of the head section is 1.8 mm, the outer diameter of the middle section is 2.8 mm, and the inner diameter of the middle section is 2.5 mm.

[0040] In one embodiment, the hollow sheath tube 2 has a uniform overall thickness, with an outer diameter of 1.7 mm and an inner diameter of 1.5 mm.

[0041] In one embodiment, the flexible metal main body rod 3 is a solid structure with an outer diameter of 1.4 mm and a sharp portion at the head end of 8 mm in length.

[0042] In one embodiment, the total length of the flexible metal main rod 3 is longer than the total length of the hollow sheath 2 .

[0043] In one embodiment, the gap between the middle section and the hollow sheath tube 2 is 0.7 mm.

[0044] The use process of the present invention is as follows:

[0045] Loosen the spiral device 6, adjust the length of the hollow sheath tube 2 protruding from the head section of the outer sheath tube 1 to achieve the protrusion and hiding of the flexible metal main body rod 3, and further tighten the second spiral fixing device 5 to fix it. When the tip of the flexible metal main body rod 3 protrudes, it can be used to break through the wall of the bulla and guide the head section of the flexible catheter device into the bulla cavity. After breaking through the wall of the bulla, loosen the spiral device 6, adjust the hollow sheath tube 2, hide the tip of the flexible metal main body rod 3, and tighten the spiral fixing device 5 to fix it to avoid damaging other tissues. Then, connect the external drug injection device to the adhesive through the side syringe suction interface 7, and at the same time, the tail syringe suction interface 8 is connected to the external suction device to collapse the bulla by negative pressure suction, so as to achieve synchronous suction and injection, which can greatly improve the efficiency and success rate of bulla lung volume reduction. Further, in one embodiment, the side syringe suction interface 7 and the tail syringe suction interface 8 can both realize the functions of injection and suction.

[0046] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation, characterized in that: It comprises an outer sheath tube (1) and a hollow sheath tube (2), wherein the hollow sheath tube (2) is sleeved inside the outer sheath tube (1) and has two ends extending out of the outer sheath tube (1), and the hollow sheath tube (2) slides inside the outer sheath tube (1), and the length of the protruding portion of the front end of the hollow sheath tube (2) is adjusted by sliding; A flexible metal main body rod (3) is inserted into the hollow sheath tube (2), and the flexible metal main body rod (3) is used to break through the wall of the bulla; The outer sheath tube (1) and the hollow sheath tube (2) together constitute the outer wall of the entire flexible catheter device, and the outer wall is divided into three sections with the flexible metal main body rod as the axis, namely, a head section, a middle section and a tail screw section; The tail end of the hollow sheath tube (2) is connected to the tail syringe suction interface (8), and the syringe interface of the tail syringe suction interface (8) is connected to the hollow lumen of the hollow sheath tube (2) to achieve suction or injection functions.

2. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The head section is gradually tapered in a shallow funnel shape, and the end of the head section is completely in contact with the hollow sheath tube (2); There is a gap between the middle section and the hollow sheath tube (2), and side holes for suction are provided on both sides of the middle section near the head section; the tail screw section is connected to a first spiral fixing device (4), and the spiral fixing device (4) is connected to a side syringe suction interface (7), and the side syringe suction interface (7) is connected to the gap between the middle section and the hollow sheath tube (2) to realize the side hole suction function; the tail of the side syringe suction interface (7) is connected to a second spiral fixing device (5) to adjust the length of the hollow sheath tube (2) extending from the head section of the outer sheath tube (1) and realize the fixing function.

3. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The tail of the flexible metal main body rod (3) is connected and fixed to the hollow sheath tube (2) via a spiral device (6), and the tip breakthrough portion of the flexible metal main body rod (3) protrudes from the hollow sheath tube (2). When the spiral device (6) is released, the flexible metal main body rod (3) can be completely pulled out of the hollow sheath tube (2).

4. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: It also includes a second spiral fixing device (5) for connecting the side syringe suction interface (7) and the spiral device (6). When the screw mouth of the second spiral fixing device (5) is loosened, the spiral device (6) can pull the hollow sheath tube (2) to slide inside the outer sheath tube (1), thereby adjusting the length of the protruding portion of the hollow sheath tube (2). At the same time, the length of the protruding portion of the hollow sheath tube (2) is fixed by tightening the second spiral fixing device (5).

5. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The outer diameter of the head section is 2.0 mm, the inner diameter of the head section is 1.8 mm, the outer diameter of the middle section is 2.8 mm, and the inner diameter of the middle section is 2.5 mm.

6. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The overall thickness of the hollow sheath tube (2) is uniform, with an outer diameter of 1.7 mm and an inner diameter of 1.5 mm.

7. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The flexible metal main rod (3) is a solid structure with an outer diameter of 1.4 mm and a sharp tip portion of 8 mm in length.

8. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The total length of the flexible metal main rod (3) is longer than the total length of the hollow sheath tube (2).

9. A flexible catheter device capable of achieving synchronous suction and drug injection through endoscopic operation as claimed in claim 1, characterized in that: The gap between the middle section and the hollow sheath tube (2) is 0.7 mm.

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