Protective catheter and closed sputum suction tube comprising same

Abstract

The utility model discloses a protective catheter which comprises a catheter body and a suction head used for sucking sputum, and the catheter body and the suction head are provided with fluid channels communicated with each other. Wherein the tail end of the suction head is provided with a main suction hole used for sucking sputum, the side wall of the suction head is provided with a side suction hole, and the main suction hole and the side suction hole are both communicated with the fluid channel; a protection part is arranged on the periphery of the side suction hole, and a vent groove is formed in the side wall of the protection part. In addition, the utility model further relates to a closed sputum suction tube comprising the protective catheter. By the adoption of the sputum suction catheter, sputum can be sucked efficiently, and meanwhile the sputum suction catheter is prevented from injuring the respiratory tract.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to a protective catheter and a closed sputum suction tube comprising the protective catheter. Background Art

[0002] Clinically, for patients who are unable to expectorate or have difficulty breathing due to coughing, artificial suction is required to clear respiratory secretions and keep the airway open. The suction tube is a treatment tool used for artificial suction. Nursing staff can use the suction effect of negative pressure to suck out the sputum and aspirated materials in the trachea through the suction tube. Depending on the suction method, it can be divided into open suction and closed suction.

[0003] Open suction requires disconnection of the ventilator during suction, which reduces fluid channel pressure, increases the risk of fluid channel contamination and ventilator-associated pneumonia, and causes sputum splashing, increasing occupational exposure of medical staff and increasing the risk of cross-infection and lung infection. Closed suction uses a special closed suction device that can be connected to a ventilator and endotracheal tube, so that the patient can continue to use the ventilator to maintain the necessary positive airway pressure and therapeutic oxygen concentration during suction.

[0004] In order to completely remove the sputum in the patient's respiratory tract in a timely manner, commonly used sputum suction tubes have not only an opening at the front end of the tube, but also a small hole in the side wall of the tube near the front end. However, during negative pressure suction, the hole in the side wall of the tube may stick to the respiratory mucosa of the pharynx or trachea, and the mucosa completely blocks the side wall hole under the action of negative pressure, and is further sucked into the side wall hole, causing congestion, edema or scratches on the respiratory mucosa.

[0005] Therefore, there is a need for a sputum suction tube that can efficiently clear sputum in the patient's respiratory tract and prevent the patient's respiratory tract from being damaged during the sputum suction process. Utility Model Content

[0006] The technical problem to be solved by the embodiments of the utility model is to provide a protective catheter that can efficiently absorb sputum and avoid damage to the respiratory tract.

[0007] In order to solve the above technical problems, the embodiment of the utility model provides a protective catheter, comprising a catheter body and a suction head for suctioning sputum, wherein the catheter body and the suction head have a fluid channel connected to each other;

[0008] Wherein, the end of the suction head is provided with a main suction hole for suctioning sputum, and the side wall of the suction head is provided with a side suction hole, and both the main suction hole and the side suction hole are connected to the fluid channel;

[0009] A protection part is arranged around the side suction hole, and a ventilation groove is arranged on the side wall of the protection part.

[0010] As an improvement of the above solution, the tube wall around the side suction hole protrudes outward to form the protective portion.

[0011] As an improvement of the above solution, the transition between the surface of the protection part and the outer side wall of the suction head is a smooth surface. Optionally, the surface of the protection part is an arc-shaped surface.

[0012] As an improvement of the above solution, the protective conduit includes at least two side suction holes. Preferably, along the axial direction of the fluid channel, the side suction holes are staggered. More preferably, the side suction holes are spirally distributed on the suction head.

[0013] As an improvement of the above solution, the catheter body, the suction head and the protective part are an integrated structure and are made of flexible material.

[0014] As an improvement of the above solution, the catheter body and / or the suction head is provided with scale markings for indicating the insertion depth.

[0015] As an improvement of the above solution, the end of the suction head is provided with a circular chamfer.

[0016] As an improvement of the above solution, the aperture of the side suction hole is smaller than the aperture of the fluid channel.

[0017] As an improvement of the above solution, the depth of the ventilation groove is not less than 10% of the diameter of the side suction hole, and the width of the ventilation groove is not less than 20% of the diameter of the side suction hole.

[0018] In another aspect, the utility model also provides a closed sputum suction tube, which comprises the protective catheter as described above. Specifically, the closed sputum suction tube comprises a three-way joint, a sputum suction catheter and a negative pressure joint, wherein the sputum suction catheter is the protective catheter described herein.

[0019] The implementation of this utility model has the following beneficial effects:

[0020] The protective catheter of the utility model has a side suction hole, a protective part is arranged around the side suction hole, and a ventilation groove is arranged on the side wall of the protective part, so as to avoid the respiratory mucosa from completely blocking the side suction hole, protect the respiratory mucosa from damage, and ensure the normal sputum suction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of the protective conduit of the first embodiment of the utility model;

[0022] Figure 2 It is a schematic structural diagram of the suction head of the protective catheter in the first embodiment of the utility model;

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the suction head of the protective catheter in the first embodiment of the utility model;

[0024] Figure 4 It is a three-dimensional structural diagram of the closed sputum suction tube of the second embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1

[0027] See also Figure 1 , 2 and 3. Embodiment 1 of the utility model provides a protective catheter, comprising a catheter body 1 and a suction head 2 for suctioning sputum, wherein the suction head 2 is arranged at one end of the catheter body 1, and the suction head 2 and the catheter body 1 have a fluid channel a connected to each other; one end of the catheter body 1 is connected to the suction head 2, and the other end is used to connect a negative pressure pipeline.

[0028] The end of the suction head 2 is provided with a main suction hole 21 for suctioning sputum, and the side wall of the suction head 2 is provided with a side suction hole 22, and both the main suction hole 21 and the side suction hole 22 are connected to the fluid channel a;

[0029] A protection portion 23 is disposed around the side suction hole 22 , and a ventilation groove 231 is disposed on a side wall of the protection portion 23 .

[0030] Specifically, the tube wall around the side suction hole 22 protrudes outward to form the protective portion 23. In order to improve the comfort of the protective portion 23 to the respiratory tract, the surface of the protective portion 23 is an arc-shaped surface, and the transition between the surface of the protective portion 23 and the outer side wall of the suction head 2 is a smooth surface, that is, the angle between the outer side wall of the suction head 2 and the surface of the protective portion 23 is greater than 120°.

[0031] The ventilation groove 231 is connected to the side suction hole 22, so that sputum adhering to the respiratory mucosa can be efficiently sucked into the side suction hole 22. At the same time, the ventilation groove 231 can ensure the fluidity of the side suction hole 22 to prevent the respiratory mucosa from completely blocking the side suction hole 22 and being pulled into the side suction hole 22 by negative pressure, thereby causing damage to the mucosa.

[0032] In order to improve the efficiency of sputum suction and remove sputum as much as possible, the protective catheter includes at least two side suction holes 22; along the axial direction of the fluid channel a, adjacent side suction holes 22 have a preset spacing and are staggered in the circumferential direction of the catheter, so that the effective removal range of the side suction holes 22 is larger. Preferably, the side suction holes 22 are spirally distributed on the suction head.

[0033] The catheter body 1, the suction head 2 and the protective part 23 are an integrated structure and are made of flexible materials, such as soft plastic or silicone, etc., more preferably, transparent plastic or silicone materials.

[0034] In order to facilitate the operation of medical users, the surface of the catheter body 1 and / or the suction head 2 is provided with scale marks for indicating the insertion depth, so that the operator can know the insertion depth.

[0035] Moreover, in order to improve the comfort and reduce damage during the insertion of the suction head 2 into the patient, a circular chamfer 24 is provided at the end of the suction head 2.

[0036] The aperture of the side suction hole 22 is smaller than the aperture of the fluid channel a to ensure the sputum suction performance of the suction head 2.

[0037] Further, in order to prevent the lateral fluid channel from having too strong an adsorption force on the mucosa, the depth of the vent groove 231 is not less than 10% of the diameter of the side suction hole 22, and the width is not less than 20% of the diameter of the side suction hole 22. Preferably, the depth of the vent groove 231 is not less than 15% of the diameter of the side suction hole 22, and the width is not less than 30% of the diameter of the side suction hole 22.

[0038] Specifically, the aperture of the fluid channel a is 3-5 mm, the aperture of the side suction hole 22 is 2-4 mm, the width of the ventilation groove 231 is 0.5-1.5 mm, and the depth of the ventilation groove 231 is 0.3-0.8 mm.

[0039] Preferably, the aperture of the fluid channel a is 3.4 mm, the aperture of the side suction hole 22 is 2.5 mm, the width of the ventilation groove 231 is 1.0 mm, and the depth of the ventilation groove 231 is 0.5 mm.

[0040] Embodiment 2

[0041] See also Figure 4 The second embodiment of the present invention provides a closed sputum suction tube 100 , which includes the protective catheter as described in the first embodiment as a sputum suction catheter 120 .

[0042] Specifically, the closed sputum suction tube 100 of the second embodiment includes a three-way joint 110, a sputum suction catheter 120 and a negative pressure joint 130. The three-way joint 100 includes a ventilator joint 111, a cannula joint 112, a dosing tube 113, an isolation valve 114 and a flushing tube 115. The sputum suction catheter 120 is covered with a transparent protective cover 121 to isolate the sputum suction catheter from the external environment. The negative pressure joint 130 also includes a negative pressure control valve 131.

[0043] The isolation valve 114 separates the three-way connector into a breathing chamber on the side close to the patient end and a flushing chamber on the side away from the patient end. The ventilator connector 111, the intubation connector 112, and the dosing tube 113 are located on one side of the breathing chamber, and the flushing tube 115 is located in the flushing chamber. The isolation valve 114 can be used to open or close the fluid channel between the flushing chamber and the breathing chamber. When the isolation valve is in an open state, the suction catheter 120 can extend into and pass through the breathing chamber. The ventilator connector 111 is used to connect the ventilator pipeline, the intubation connector 112 is used to connect the endotracheal cannula, the dosing tube 113 is used to administer drugs to the patient's respiratory tract, and the flushing tube 115 is used to clean the inside of the suction catheter by injecting flushing fluid. The negative pressure connector 130 is used to connect a negative pressure generating device. The negative pressure control valve 131 can control the degree of connectivity between the negative pressure connector and the suction hose.

[0044] The sputum suction catheter 120 can enter the endotracheal tube connected to the intubation connector through the intubation connector 112, and enter the patient's respiratory tract, so as to extract sputum in the patient's respiratory tract through negative pressure suction. The sputum suction catheter 120 can be provided with a mark for indicating the insertion depth, and the mark on the sputum suction catheter can be observed through the transparent protective cover 121.

[0045] The closed sputum suction tube of the utility model can prevent the inner wall of the respiratory tract from blocking the suction port of the sputum suction tube during the sputum suction process, protect the respiratory tract mucosa, and ensure the sputum suction efficiency. The above is a preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A protective catheter, characterized in that: It comprises a catheter body and a suction head for suctioning sputum, wherein the catheter body and the suction head have a fluid channel connected to each other; Wherein, a main suction hole for suctioning sputum is provided at the end of the suction head, and a side suction hole is provided on the side wall of the suction head, and both the main suction hole and the side suction hole are connected to the fluid channel; A protection part is arranged around the side suction hole, and a ventilation groove is arranged on the side wall of the protection part.

2. The protective catheter according to claim 1, characterized in that The tube wall around the side suction hole protrudes outward to form the protection part.

3. The protective catheter according to claim 2, characterized in that The transition between the surface of the protective part and the outer side wall of the suction head is a smooth surface.

4. The protective catheter according to claim 1, characterized in that The protective conduit comprises at least two side suction holes.

5. The protective catheter according to claim 1, characterized in that The catheter body, the suction head and the protective part are an integrated structure, and the protective catheter is made of a flexible material.

6. The protective catheter according to claim 1, characterized in that The catheter body and / or the suction head are provided with scale marks for indicating the insertion depth.

7. The protective catheter according to claim 1, characterized in that The end of the suction head is provided with a circular arc chamfer.

8. The protective catheter according to claim 1, characterized in that The aperture of the side suction hole is smaller than the aperture of the fluid channel.

9. The protective catheter according to claim 1, characterized in that The depth of the ventilation groove is not less than 10% of the diameter of the side suction hole, and the width of the ventilation groove is not less than 20% of the diameter of the side suction hole.

10. A closed sputum suction tube, characterized in that: Comprising a protective catheter as described in any one of claims 1-9.

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