Suction tube side hole anti-adhesion film safety head

Abstract

The application discloses a sputum suction tube side hole anti-adhesion membrane safety head, which comprises a safety head body, wherein the safety head body comprises a tube body and a probe; the probe is movably installed at the head end of the tube body; the tail end of the tube body is provided with a negative pressure device connecting port; a gap exists between the probe and the tube body to form an annular side suction hole; a connecting bridge is fixedly connected between the probe and the tube body, and the connecting bridge is located inside the annular side suction hole; the annular side suction hole is arranged to replace traditional discrete side holes, negative pressure can be dispersed, and mucosal injury caused by excessive single-point adsorption force can be avoided; first-level protection is achieved by actively pushing away the mucosa through deformation of the connecting bridge; second-level protection is achieved by automatically opening the standby hole to eliminate the negative pressure; and double mechanisms ensure that the mucosa can be effectively protected under different adsorption strengths.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a safety head for a suction tube with a side hole anti-adhesion membrane. Background Technology

[0002] Suction catheters are important medical devices used in clinical practice to clear respiratory secretions from patients, and are widely used in the care of critically ill patients, such as those undergoing tracheotomy or mechanical ventilation. Their working principle involves connecting a negative pressure device to the end of the catheter, using negative pressure to draw in sputum and secretions from the respiratory tract through the suction port at the beginning of the catheter, thus maintaining airway patency and reducing the risk of lung infection.

[0003] Common suction catheters in current technology are generally designed with an opening at the top and some with side holes. They are prone to adhering to the mucosa, causing mucosal damage and bleeding. This is especially true when suctioning is performed on the main trachea with an artificial airway. Because it is not possible to see and suction blindly, the tip is prone to causing bleeding in the carina. The bleeding site cannot be compressed, making it difficult to stop the bleeding. The bleeding accumulates in the lung lobe due to gravity, which can cause atelectasis and thus worsen the condition. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a side hole anti-adhesion safety head for suction catheters, thus solving the problem that existing suction catheters easily adhere to mucous membranes and cause damage.

[0005] To achieve the above objectives, the present invention provides a side-hole anti-adhesion safety head for a suction catheter, comprising a safety head body, the safety head body including a tube and a probe, the probe being movably mounted at the head end of the tube, the tail end of the tube being provided with a negative pressure device connection port, and a gap between the probe and the tube forming an annular side suction hole; a connecting bridge is fixedly connected between the tube and the probe, the connecting bridge being located inside the annular side suction hole.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Preferably, the connecting bridge is arc-shaped and protrudes in a direction away from the axis of the tube body.

[0008] Preferably, multiple connecting bridges are provided, and they are arranged in a circular array around the axis of the tube body.

[0009] Preferably, the tube body is made of medical-grade polyvinyl chloride through one-piece injection molding, and the probe and connecting bridge are made of medical-grade silicone material.

[0010] Preferably, the probe is coaxially provided with a connecting seat and a central shaft at one end near the tube body. One end of the central shaft is fixedly connected to the connecting seat, and the other end of the central shaft extends into the interior of the tube body. A bracket is fixedly connected to the inner wall of the first end of the tube body. A limiting ring coaxial with the central shaft is provided on the bracket, and the limiting ring is sleeved on the central shaft.

[0011] Preferably, a collar is fixedly connected to the central shaft, and an annular groove is formed on the outer peripheral wall of the collar. A connecting ring is rotatably fitted on the annular groove, and a connecting frame is fixedly connected between the connecting ring and the bracket.

[0012] Preferably, the side wall of the tube is provided with a spare hole, and a sealing plate for opening and closing the spare hole is slidably disposed inside the tube, with one end face of the sealing plate in contact with the inner wall of the tube.

[0013] Preferably, a spiral groove is provided on the central shaft, a lever is fixedly connected to the inner wall of the connecting ring, one end of the lever extends into the interior of the spiral groove, a connecting arm is fixedly connected to the outer wall of the connecting ring, and the end of the connecting arm away from the connecting ring is fixedly connected to the sealing plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] By setting an annular side suction hole instead of the traditional discrete side hole, the negative pressure can be dispersed, avoiding mucosal damage caused by excessive single-point adsorption force. The first-level protection actively pushes away the mucosa through the deformation of the connecting bridge, and the second-level protection automatically opens the spare hole to eliminate the negative pressure. The dual mechanism ensures that the mucosa can be effectively protected under different adsorption intensities.

[0016] No manual operation is required. Automatic response is achieved through negative pressure-mechanical linkage, solving the problem of timely adsorption due to limited field of vision in clinical operations. Attached Figure Description

[0017] Figure 1 This is an isometric view of one side of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the probe structure of the present invention;

[0019] Figure 3 This is a cross-sectional view of the tube structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the connecting ring structure of the present invention;

[0021] Figure 5 This is a cross-sectional view of the tube body of the present invention from another perspective;

[0022] Figure 6 This is a schematic diagram of the central axis structure of the present invention.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Safety head body; 2. Tube body; 201. Bracket; 202. Limiting ring; 203. Spare hole; 3. Probe; 301. Connecting seat; 4. Negative pressure device connection port; 5. Annular side suction hole; 6. Connecting bridge; 7. Connecting ring; 701. Connecting frame; 702. Lever; 703. Connecting arm; 8. Sealing plate; 9. Central shaft; 901. Collar; 902. Annular groove; 903. Spiral groove. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-6 As shown, this embodiment provides a side-hole anti-mucosal safety head for a suction catheter, including a safety head body 1. The safety head body 1 includes a tube body 2 and a probe 3. The probe 3 is movably installed at the head end of the tube body 2 (the end closest to the patient's airway). The tail end of the tube body 2 is provided with a negative pressure device connection port 4 (for connecting to an external negative pressure suction device). There is a gap between the probe 3 and the tube body 2, forming an annular side suction hole 5. This annular side suction hole 5 replaces the traditional discrete side holes, which can disperse negative pressure and avoid mucosal damage caused by excessive single-point suction force.

[0027] The tube body 2 and the probe 3 are fixedly connected by a connecting bridge 6, which is located inside the annular side suction hole 5. Its core function is to ensure the relative position stability of the probe 3 and the tube body 2, while achieving a primary anti-adsorption function through its own deformation characteristics; at the same time, it separates the airflow within the annular side suction hole 5, further dispersing the negative pressure.

[0028] In summary, the improvement of this embodiment lies in the fact that by setting an annular side suction hole 5 instead of the traditional discrete side holes, the negative pressure can be dispersed, avoiding mucosal damage caused by excessive single-point adsorption force.

[0029] Based on the above, other structures also need to be disclosed in detail, such as:

[0030] The connecting bridge 6 is arc-shaped and protrudes away from the axis of the tube body 2. The key function of this structure is that when the annular side suction hole 5 forms a closed negative pressure area with the tracheal mucosa, the connecting bridge 6 can actively push away the mucosa through changes in curvature. Specifically, the closed negative pressure will cause the probe 3 to be subjected to an adsorption force in the direction of the tube body 2. At this time, the outwardly protruding connecting bridge 6 will deepen its curvature (increase the arc) due to the force, and use its elastic deformation to generate an outward thrust, pushing the contacting tracheal mucosa outward, thereby creating a flow gap and breaking the closed negative pressure environment.

[0031] Furthermore, multiple connecting bridges 6 (preferably 4-6) are provided, and they are arranged in a circular array around the axis of the tube body 2. This distribution ensures that the pushing force is applied evenly to the mucosa, avoiding mucosal damage caused by excessive local force, while also ensuring a more balanced negative pressure distribution within the annular side suction hole 5.

[0032] The tube body 2 is made of medical-grade polyvinyl chloride (PVC) through one-piece injection molding. PVC material has sufficient rigidity to ensure that the tube body 2 is not easily bent during the push process, ensuring that the suction channel is unobstructed. The probe 3 and the connecting bridge 6 are made of medical-grade silicone material. Silicone is soft and has good elasticity, which not only ensures biocompatibility when in contact with the mucosa, but also allows the connecting bridge 6 to produce controllable deformation (deepening curvature) when subjected to force, so as to realize the function of pushing away the mucosa.

[0033] A connecting seat 301 and a central shaft 9 are coaxially mounted on one end of the probe 3 near the tube body 2. One end of the central shaft 9 is fixedly connected to the connecting seat 301, and the other end extends into the interior of the tube body 2. A support 201 is fixedly connected to the inner wall of the first end of the tube body 2. A limiting ring 202 coaxial with the central shaft 9 is mounted on the support 201. The limiting ring 202 is fitted onto the central shaft 9. The cooperation between the limiting ring 202 and the central shaft 9 restricts the radial displacement of the probe 3 (ensuring uniform gaps in the annular side suction holes 5) and allows the probe 3 to move axially (providing space for triggering action during negative pressure adsorption) and rotate around the central shaft 9 (adapting to the airway orientation).

[0034] A collar 901 is fixedly connected to the central shaft 9. An annular groove 902 is formed on the outer peripheral wall of the collar 901. A connecting ring 7 is rotatably fitted onto the annular groove 902. A connecting bracket 701 is fixedly connected between the connecting ring 7 and the support 201. This structure, through the sliding fit between the connecting ring 7 and the collar 901, ensures the stability of the central shaft 9 during axial movement and rotation, preventing component jamming from affecting the triggering of the protection mechanism.

[0035] The side wall of the tube body 2 is provided with a spare hole 203. A sealing plate 8 for opening and closing the spare hole 203 is slidably installed inside the tube body 2. One end face of the sealing plate 8 is in contact with the inner wall of the tube body 2. The spare hole 203 is a secondary protection mechanism. When the deformation of the connecting bridge 6 cannot release the mucosal adsorption, external air is introduced by opening the spare hole 203 to completely eliminate the closed negative pressure.

[0036] Its automatic triggering principle is as follows: a spiral groove 903 is provided on the central shaft 9, a lever 702 is fixedly connected to the inner wall of the connecting ring 7, one end of the lever 702 extends into the interior of the spiral groove 903, and a connecting arm 703 is fixedly connected to the outer wall of the connecting ring 7, with the end of the connecting arm 703 away from the connecting ring 7 fixedly connected to the sealing plate 8. When the annular side suction hole 5 forms a closed negative pressure and the connecting bridge 6 cannot release the adsorption, the probe 3 will be continuously adsorbed and moved towards the tube body 2, driving the central shaft 9 to move axially synchronously; at this time, the spiral groove 903 drives the connecting ring 7 to rotate through the lever 702, and the connecting ring 7 then pulls the sealing plate 8 along the inner wall of the tube body 2 through the connecting arm 703, causing the sealing plate 8 to disengage from the spare hole 203, and external air enters the tube body 2 through the spare hole 203, reducing the negative pressure intensity at the annular side suction hole 5, and finally releasing the adsorption on the tracheal mucosa.

[0037] In summary, the working principle of this solution is as follows:

[0038] Connect the tail end of the tube 2 to the negative pressure device. At this time, the sealing plate 8 is in the initial state of closing the spare hole 203, while the annular side suction hole 5 remains open.

[0039] Insertion and suctioning: Insert probe 3 into the patient's airway, activate the negative pressure device, and the sputum is sucked into the tube 2 through the annular side suction port 5; the connecting bridge 6 separates the airflow to avoid negative pressure concentration.

[0040] Level 1 protection trigger (function of connecting bridge 6): If the annular side suction hole 5 comes into contact with the tracheal mucosa to form a closed negative pressure area, the probe 3 will be attracted to the tube body 2 by the adsorption force. The connecting bridge 6 will be more curved due to the force (the protrusion will be more obvious), pushing the mucosa outward to form an air flow gap and release the closed negative pressure (in most cases, the adsorption problem can be solved at this stage).

[0041] Secondary protection trigger (backup hole 203 opens): If the mucosal adhesion is too strong, the deformation of the connecting bridge 6 cannot release the seal. The probe 3 continues to move towards the tube body 2 and drives the central shaft 9 to move axially. The spiral groove 903 on the central shaft 9 drives the connecting ring 7 to rotate through the lever 702. The connecting ring 7 pulls the sealing plate 8 to slide through the connecting arm 703, so that the backup hole 203 gradually opens. External air enters the tube body 2 through the backup hole 203, reducing the negative pressure at the annular side suction hole 5 and completely releasing the mucosal adhesion.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A side-hole anti-adhesion safety head for a suction catheter, comprising a safety head body (1), characterized in that: The safety head body (1) includes a tube (2) and a probe (3). The probe (3) is movably installed at the head end of the tube (2). The tail end of the tube (2) is provided with a negative pressure device connection port (4). There is a gap between the probe (3) and the tube (2) to form an annular side suction hole (5). A connecting bridge (6) is fixedly connected between the tube body (2) and the probe (3), and the connecting bridge (6) is located inside the annular side suction hole (5); The probe (3) is coaxially provided with a connecting seat (301) and a central shaft (9) at one end near the tube body (2). One end of the central shaft (9) is fixedly connected to the connecting seat (301), and the other end of the central shaft (9) extends into the interior of the tube body (2). A bracket (201) is fixedly connected to the inner wall of the first end of the tube body (2). A limiting ring (202) coaxial with the central shaft (9) is provided on the bracket (201). The limiting ring (202) is sleeved on the central shaft (9). A collar (901) is fixedly connected to the central shaft (9). A ring groove (902) is provided on the outer peripheral wall of the collar (901). A connecting ring (7) is rotatably sleeved on the ring groove (902). A connecting frame (701) is fixedly connected between the connecting ring (7) and the bracket (201). The side wall of the tube (2) is provided with a spare hole (203), and a sealing plate (8) for opening and closing the spare hole (203) is slidably provided inside the tube (2). One end face of the sealing plate (8) is in contact with the inner wall of the tube (2). A spiral groove (903) is provided on the central shaft (9). A lever (702) is fixedly connected to the inner wall of the connecting ring (7). One end of the lever (702) extends into the interior of the spiral groove (903). A connecting arm (703) is fixedly connected to the outer wall of the connecting ring (7). The end of the connecting arm (703) away from the connecting ring (7) is fixedly connected to the sealing plate (8).

2. The anti-adhesion safety head for the side hole of the suction catheter according to claim 1, characterized in that: The connecting bridge (6) is arc-shaped and protrudes away from the axis of the tube body (2).

3. The anti-adhesion safety head for the side hole of the suction catheter according to claim 1, characterized in that: Multiple connecting bridges (6) are provided and are arranged in a circular array around the axis of the tube body (2).

4. The anti-adhesion safety head for the side hole of the suction catheter according to claim 1, characterized in that: The tube body (2) is integrally injection molded from medical-grade polyvinyl chloride, and the probe (3) and connecting bridge (6) are made of medical-grade silicone material.

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