A bulb drainage tube having a plurality of side suction slots

Abstract

The utility model discloses a ball head drainage tube with multiple side suction grooves relates to medical instrument technical field. The drainage tube includes the semispherical head, the suction pipe and the drainage hose that connect gradually, and the three inside common constitution thorough center flow channel. The pipe wall of suction pipe is equipped with multiple circular arc close type side suction grooves, and the longitudinal section geometry of this side suction groove is constituted by the inside expansion cavity and the outside narrow entrance, and the narrow entrance is formed by two sections of the small radius circular arc that inwardly converges to each other, and the expansion cavity profile is the large radius circular arc, and both are smooth transition and are communicated with the center flow channel. The structure makes the drainage liquid can smoothly pass through narrow entrance and gather in expansion cavity, can effectively block the big soft tissue simultaneously, reduces the risk of blockage. The semispherical head helps to reduce the tissue damage in the process of insertion. The utility model structure design pertinence is strong, and has improved the reliability and operating safety of drainage.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a ball-head drainage tube with multiple side suction grooves. Background Technology

[0002] In medical drainage procedures, drainage tubes are essential instruments for draining fluid or gas accumulated in the interstitial spaces or body cavities. Traditional drainage tubes typically have circular or strip-shaped side holes in their walls to achieve drainage. However, under negative pressure, the edges of these side holes can easily come into direct contact with soft tissue, potentially drawing tissue into the hole and causing blockage and drainage failure. To address the problem of blockage with a single side hole, solutions have emerged that incorporate multiple drainage holes or grooves in the tube wall. However, simply stacking multiple drainage structures does not fundamentally change the way tissue interacts with the openings, and the risk of blockage remains.

[0003] Furthermore, some drainage tubes have flat or angular insertion tips. During insertion, these tips may cause unnecessary scraping or compression of the tissues along the path, increasing the risk of local tissue damage. Although some methods have attempted to improve the drainage tube tip, such as using passivation, there is still room for improvement in balancing the tip shape with overall drainage efficiency. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides a ball-head drainage tube with multiple side suction grooves.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a ball-head drainage tube with multiple side suction grooves, including a hemispherical head, a suction tube, and a drainage hose;

[0006] The hemispherical head is fixedly connected to the front end of the suction tube, and the rear end of the suction tube is fixedly connected to the drainage tube. The interior of the hemispherical head, the suction tube, and the drainage tube together form a through central flow channel.

[0007] The suction tube has multiple arc-shaped side suction grooves on its circumference.

[0008] The longitudinal cross-sectional geometry of the arc-shaped side suction groove includes an enlarged cavity and a narrow inlet;

[0009] The outline of the enlarged cavity is a circular arc with a large radius;

[0010] The narrow inlet connects the expansion chamber to the outer surface of the suction tube wall and consists of two small-radius arcs that curve inward toward each other.

[0011] The narrow inlet smoothly transitions into the expanded cavity and connects to the central flow channel.

[0012] In one specific embodiment, the number of arc-shaped side suction grooves is 4 to 8.

[0013] In one specific embodiment, the width of the narrow entrance is 0.3 mm to 0.8 mm.

[0014] In one specific embodiment, the maximum width of the enlarged cavity is 1.5 mm to 2.5 mm.

[0015] In one specific embodiment, the arc-shaped side suction grooves are arranged in a ring array around the axis of the suction pipe.

[0016] In one specific embodiment, the arc-shaped constricted side suction grooves are arranged along a direction parallel to the axis of the suction tube.

[0017] In one specific embodiment, a circular central hole is provided at the top center of the hemispherical head, and the central hole is connected to the central flow channel through a flow guide channel.

[0018] In one specific embodiment, the diameter of the central hole at the top is 0.5 mm to 1.2 mm.

[0019] In one specific embodiment, the flow channel is cylindrical.

[0020] In one specific embodiment, the hemispherical head, inhalation tube, and drainage tubing are made of medical-grade PVC or silicone material.

[0021] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0022] This invention features a circularly constricted side suction groove on the periphery of the suction tube wall. A narrow inlet, composed of two converging small-radius arcs, smoothly transitions to an enlarged cavity with a large-radius arc profile inside. The tiny opening width of the narrow inlet forms a physical screening barrier, allowing liquid and fine particles to pass through during drainage, while effectively preventing large pieces of soft tissue from entering the drainage tube. The enlarged cavity provides a low-resistance buffer and converging space for the fluid flow through the narrow inlet, reducing fluid dynamic pressure loss. In contrast, conventional rectangular or circular side holes in existing technologies easily draw in adjacent soft tissue under negative pressure, causing instantaneous blockage of the drainage channel. The circularly constricted structure of this invention effectively reduces the probability of blockage in the drainage tube within a soft tissue environment, improving the continuity of drainage operations.

[0023] This invention utilizes a hemispherical head fixedly connected to the front end of the suction tube. Its smooth spherical contour allows for smooth separation and lateral movement of tissue during insertion of the drainage tube into the target area, enabling the tissue to naturally slide into the arc-shaped suction groove area on the side. The hemispherical head itself does not produce sharp cutting or piercing effects on the tissue, avoiding local tissue damage. Traditional flat or pointed designs of drainage tubes tend to generate significant insertion resistance and tissue trauma upon contact with tissue. The hemispherical head structure of this invention significantly reduces mechanical stimulation to surrounding tissues during drainage tube insertion, creating better conditions for subsequent drainage operations.

[0024] This invention features a circular central hole at the top center of the hemispherical head, connected to the central flow channel via a short, straight guide channel. When the narrow inlets of all the arc-shaped side suction grooves are completely blocked due to external pressure or tissue coverage, the central hole acts as a constantly open microscopic pressure relief channel, maintaining a slight pressure balance between the central flow channel and the external environment, preventing the formation of a local vacuum within the flow channel that could completely interrupt the drainage operation. When the drainage tube becomes blocked by deposits, the operator can connect a high-pressure flushing device from the end of the drainage hose. The flushing fluid will advance at high speed along the central flow channel and be concentrated and ejected from the central hole, which has the smallest cross-sectional area, forming a directional jet that directly acts on the densest blockage at the front end of the drainage tube. In existing technologies, once the drainage tube becomes completely blocked, it is often difficult to effectively clear the blockage through conventional flushing, and sometimes the drainage tube even needs to be replaced. The central hole at the top of this invention provides a vacuum-proof and reverse flushing path for the drainage tube, enhancing its self-recovery capability under complex operating conditions.

[0025] This invention features multiple sets of arc-shaped, tapering side suction grooves arranged along the periphery of the suction tube wall, parallel to the tube's axis, and distributed in a ring array around the axis. This multi-row, circumferentially uniform layout ensures that the drainage tube forms effective suction areas at multiple levels along the axis and in all circumferential directions. Regardless of the drainage tube's orientation or changes in the liquid level at the target location, a portion of the arc-shaped, tapering side suction grooves remains below the effective liquid level and continues to operate. Traditional single-row or asymmetrically distributed drainage holes are prone to all being exposed above the liquid surface simultaneously when the liquid level drops or the drainage tube shifts, leading to drainage failure. This invention, through the optimized spatial arrangement of multiple sets of arc-shaped, tapering side suction grooves, significantly expands the effective drainage range of a single drainage tube, reduces dependence on the tube's placement accuracy, and improves the stability of drainage efficiency. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0027] Figure 1This is a schematic diagram of a ball-head drainage tube with multiple side suction grooves;

[0028] Figure 2 yes Figure 1 Sectional view of section AA;

[0029] Figure 3 This is a schematic diagram of the structure of the central hole at the top;

[0030] In the diagram: 1. Hemispherical head; 2. Suction tube; 3. Drainage tube; 4. Arc-shaped side suction groove; 5. Top center hole; 4a. Narrow entrance; 4b. Expansion chamber. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0032] like Figure 1 , Figure 2 As shown, a ball-head drainage tube with multiple side suction grooves, made of medical-grade PVC or silicone material, includes a hemispherical head 1, a suction tube 2, and a drainage tube 3. Specifically, the hemispherical head 1 is fixedly connected to the front end of the suction tube 2, and the rear end of the suction tube 2 is fixedly connected to and internally communicates with the drainage tube 3. The hemispherical head 1, the suction tube 2, and the drainage tube 3 together form a hollow central flow channel. The end of the drainage tube 3 is equipped with a standard interface for connecting an external negative pressure suction device.

[0033] like Figure 2 As shown, multiple sets of arc-shaped constricted side suction grooves 4 are formed on the periphery of the suction pipe 2. These arc-shaped constricted side suction grooves 4 are arranged parallel to the axis of the suction pipe 2, forming a ring array around the axis. The longitudinal cross-sectional geometry of a single arc-shaped constricted side suction groove 4 consists of an enlarged cavity 4b and a narrow inlet 4a. The outline of the enlarged cavity 4b is a large-radius arc; the narrow inlet 4a connects the enlarged cavity 4b to the outer surface of the pipe wall, and its outline consists of two small-radius arcs that converge inwards, forming a constricted shape. The narrow inlet 4a and the enlarged cavity 4b transition smoothly and communicate with the central flow channel.

[0034] When external negative pressure is applied to the central flow channel, the drainage fluid flows sequentially through the narrow inlet 4a and the expanded cavity 4b, finally entering the central flow channel. The narrow inlet 4a's minute width forms a physical screening barrier, allowing liquid and fine particles to pass through, but effectively preventing large pieces of soft tissue from entering. The expanded cavity 4b provides a low-resistance buffer and converging space for the fluid flow through the narrow inlet 4a, reducing fluid dynamic pressure loss. Multiple arc-shaped side suction grooves 4 are longitudinally distributed in the circumferential direction, ensuring that effective suction areas can be formed at different orientations and depths of the drainage tube. The geometric shape of the hemispherical head 1 can smoothly separate tissue during insertion, guiding the tissue to the teardrop-shaped side suction groove 4 area on the side, while avoiding cutting or puncturing the tissue itself.

[0035] like Figure 3 As shown, a central hole 5 is added at the center of the top of the hemispherical head 1. The central hole 5 is a circular through hole with a diameter of 0.5 mm to 1.2 mm. The central hole 5 is directly connected to the central flow channel through a short, straight guide channel.

[0036] Under normal drainage conditions, the top center hole 5 serves as an auxiliary drainage channel. When the narrow inlets 4a of all the arc-shaped side suction grooves 4 are simultaneously blocked due to external pressure or tissue coverage, the top center hole 5 acts as a normally open micro-pressure relief channel, maintaining a slight air pressure balance between the central flow channel and the external environment, preventing the formation of a local vacuum inside the flow channel that would lead to complete interruption of drainage.

[0037] When the drainage tube becomes clogged with deposits, the operator can connect a high-pressure flushing device through the standard interface at the end of the drainage hose 3. Driven by pressure, the flushing fluid flows at high speed along the central channel and is concentrated and ejected from the smallest cross-sectional area central hole 5 at the top. This jet can directly target the densest blockage at the front end of the drainage tube, achieving targeted removal. The expanded cavity 4b structure of the arc-shaped side suction groove 4 also provides diffusion space for the counter-flowing flushing fluid during this process, assisting in breaking down the laterally adsorbed blockages.

[0038] Example 1:

[0039] This embodiment provides a ball-head drainage tube with multiple side suction grooves, including a hemispherical head 1, a suction tube 2, and a drainage hose 3. The hemispherical head 1 is fixedly connected to the front end of the suction tube 2, and the rear end of the suction tube 2 is fixedly connected to the drainage hose 3. The three are internally interconnected to form a central flow channel.

[0040] The suction tube 2 has four arc-shaped constricted side suction grooves 4 on its circumferential wall, arranged in a ring array around the axis of the suction tube 2. The longitudinal cross-sectional shape of a single arc-shaped constricted side suction groove 4 consists of an enlarged cavity 4b and a narrow inlet 4a. The width of the narrow inlet 4a is 0.3 mm. The maximum width of the enlarged cavity 4b is 1.5 mm.

[0041] Example 2:

[0042] The main structure of this embodiment is the same as that of embodiment 1, except that the arc-shaped side suction groove 4 is closed.

[0043] In this embodiment, six arc-shaped constricted side suction grooves 4 are formed on the periphery of the suction tube 2, and the arc-shaped constricted side suction grooves 4 are arranged in a ring array around the axis of the suction tube 2. The longitudinal cross-sectional shape of a single arc-shaped constricted side suction groove 4 is composed of an enlarged cavity 4b and a narrow inlet 4a. The width of the narrow inlet 4a is 0.5 mm. The maximum width of the enlarged cavity 4b is 2.0 mm.

[0044] Example 3:

[0045] The main structure of this embodiment is the same as that of embodiment 1, except that the arc-shaped side suction groove 4 is closed.

[0046] In this embodiment, eight arc-shaped constricted side suction grooves 4 are formed on the periphery of the suction tube 2, and the arc-shaped constricted side suction grooves 4 are arranged in a ring array around the axis of the suction tube 2. The longitudinal cross-sectional shape of a single arc-shaped constricted side suction groove 4 is composed of an enlarged cavity 4b and a narrow inlet 4a. The width of the narrow inlet 4a is 0.8 mm. The maximum width of the enlarged cavity 4b is 2.5 mm.

[0047] Example 4:

[0048] In this embodiment, a circular central hole 5 is formed at the center of the top of the hemispherical head 1 on a ball-shaped drainage tube with multiple side suction grooves provided in Embodiment 1. The diameter of the central hole 5 is 0.5 mm, and it is connected to the central flow channel through a cylindrical guide channel.

[0049] Example 5:

[0050] In this embodiment, a circular central hole 5 is formed at the center of the top of the hemispherical head 1 in the ball-shaped drainage tube with multiple side suction grooves provided in Embodiment 2. The diameter of the central hole 5 is 0.8 mm, and it is connected to the central flow channel through a cylindrical guide channel.

[0051] Example 6:

[0052] In this embodiment, a circular central hole 5 is formed at the center of the top of the hemispherical head 1 in the ball-shaped drainage tube with multiple side suction grooves provided in embodiment 3. The diameter of the central hole 5 is 1.2 mm, and it is connected to the central flow channel through a cylindrical guide channel.

[0053] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A ball-head drainage tube with multiple side suction grooves, characterized in that, It includes a hemispherical head (1), an inhalation tube (2), and a drainage tube (3); The hemispherical head (1) is fixedly connected to the front end of the suction tube (2), and the rear end of the suction tube (2) is fixedly connected to the drainage tube (3). The interior of the hemispherical head (1), the suction tube (2) and the drainage tube (3) together form a through central flow channel. The suction tube (2) has multiple arc-shaped side suction grooves (4) on its circumferential wall. The longitudinal cross-sectional geometry of the arc-shaped side suction groove (4) includes an enlarged cavity (4b) and a narrow inlet (4a). The outline of the enlarged cavity (4b) is a circular arc with a large radius; The narrow inlet (4a) is connected between the expanded cavity (4b) and the outer surface of the suction tube (2) wall, and is composed of two small-radius arcs that curve inward toward each other. The narrow inlet (4a) smoothly transitions to the expanded cavity (4b) and communicates with the central flow channel.

2. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The number of the arc-shaped side suction grooves (4) is 4 to 8.

3. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The width of the narrow entrance (4a) is 0.3 mm to 0.8 mm.

4. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The maximum width of the enlarged cavity (4b) is 1.5 mm to 2.5 mm.

5. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The arc-shaped side suction groove (4) is arranged in a ring array around the axis of the suction pipe (2).

6. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The arc-shaped side suction groove (4) is arranged along the axis parallel to the suction tube (2).

7. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The hemispherical head (1) has a circular top center hole (5) at the top center position, and the top center hole (5) is connected to the center flow channel through a flow guide channel.

8. A ball-head drain tube with multiple side suction grooves according to claim 7, characterized in that, The diameter of the top center hole (5) is 0.5 mm to 1.2 mm.

9. A ball-head drain tube with multiple side suction grooves according to claim 7, characterized in that, The flow channel is cylindrical.

10. A ball-head drain tube with multiple side suction grooves according to claim 1, characterized in that, The hemispherical head (1), the inhalation tube (2), and the drainage tube (3) are made of medical-grade PVC or silicone material.

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