A pressure-sensing disposable drainage tube

Abstract

This invention discloses a disposable drainage tube with pressure sensing, belonging to the field of medical drainage device technology. The drainage tube adopts a fully embedded flexible pressure sensing structure. The pressure sensing unit (2) is fully covered by a sealing layer (8) and integrally formed with the tube body (1). The wire (7) is completely embedded in the wall of the tube body (1) without protruding from the surface. The front end of the tube body (1) is provided with stepped aperture staggered anti-blockage side holes (5). The pressure sensing unit (2) is arranged near the side hole (5) to accurately monitor tissue blockage and drainage cavity pressure changes. The external section is provided with a sealing fixation seat (3) to achieve sealing and anti-displacement. The end is provided with a drainage connector (4). It is equipped with a warning module (6) and a low-power power supply unit. Based on the pressure threshold and pressure fluctuation characteristics, it realizes automatic audible and visual warnings for overpressure, blockage, and negative pressure abnormalities without the need for external equipment. This invention overcomes the shortcomings of traditional external sensors, such as easy detachment, easy infection, tissue damage from rigid components, easy blockage and leakage of drainage tubes, and lack of active prompts, through an embedded integrated structure, anti-clogging hole linkage with sensor position, and sterile and low power consumption design. The whole is sterilely packaged in a disposable manner and is suitable for negative pressure drainage of the thoracic cavity, abdominal cavity, and wound. It has outstanding substantive features and significant progress and is suitable for lightweight mass production.

Description

Technical Field

[0001] This invention relates to the field of medical disposable drainage device technology, specifically to a fully embedded flexible pressure sensing disposable drainage tube with anti-clogging hole linkage and sterilization-resistant integrated molding. Background Technology

[0002] In clinical practice, the use of ordinary disposable drainage tubes for postoperative thoracic cavity, abdominal cavity, and wound drainage has the following core drawbacks: 1. Without built-in pressure monitoring, it is impossible to detect drainage blockage or abnormal negative pressure in real time, which can easily cause tissue damage or drainage failure; 2. External sensors are complex to operate, and their protruding surfaces are prone to detachment, contamination, and increased risk of infection, making them unsuitable for single-use. 3. Sensors are mostly rigid structures, which can easily irritate or damage human body cavities and tissues; 4. The drainage side hole layout is unreasonable, making it easy to be blocked by tissue, and there is no pressure linkage judgment mechanism; 5. Electronic components and batteries are not resistant to medical sterilization, making it impossible to achieve overall disposable aseptic packaging; 6. Without a zero-point calibration mechanism, pressure drift leads to inaccurate monitoring, relying on manual observation and resulting in delayed response.

[0003] Existing technologies are mostly simple superpositions of sensors and drainage devices, failing to achieve fully embedded flexible co-forming, anti-blocking structure and sensor position linkage, and sterilization resistance and low power consumption integration. Those skilled in the art cannot obviously obtain the technical solution of this invention. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a disposable drainage tube with pressure sensing. Through fully embedded flexible pressure sensing integrated molding, precise linkage between anti-clogging side holes and sensing position, and sterilization-resistant and low-power design, it achieves integrated drainage, accurate pressure monitoring, automatic blockage detection, sealing to prevent displacement, and anti-blockage drainage. It solves the technical problems of traditional drainage tubes, such as lack of monitoring, susceptibility to infection, susceptibility to blockage, susceptibility to leakage, poor sterilization resistance, and inaccurate monitoring. It has outstanding substantive features and significant progress.

[0005] Technical solution A pressure-sensing disposable drainage tube comprises a tube body (1), a pressure sensing unit (2), a sealing and fixing seat (3), a drainage connector (4), an anti-clogging side hole (5), a warning module (6), a wire (7), a sealing adhesive layer (8), and a power supply unit.

[0006] 1. Tube body (1): Medical flexible sterile material, with an internal drainage cavity, and its flexibility is adapted to the cavity environment; 2. Pressure sensing unit (2): A flexible sensing device, fully covered by a sealing layer (8), embedded in the side wall of the tube body (1) and near the anti-blocking side hole (5), which indirectly senses pressure through the tube wall and does not contact the drainage fluid; 3. Conductor (7): Completely embedded in the wall of the pipe (1), insulated and waterproof, not protruding from the surface, with no risk of falling off or infection; 4. Sealing and fixing seat (3): Sleeve onto the outer section of the pipe body (1) to seal and prevent leakage, and fix and prevent displacement; 5. Drainage connector (4): Standard connector, quick-connect negative pressure device; 6. Anti-clogging side holes (5): staggered distribution at the front end, stepped axial diameter, small diameter at the proximal end to prevent tissue aspiration, and large diameter at the distal end to maintain flow rate; 7. Warning module (6): It has zero-point calibration and sleep wake-up, and provides sound and light warnings based on pressure threshold and fluctuation characteristics; during normal drainage, the pressure will fluctuate slightly with the patient's breathing or body position changes; when the pressure curve becomes a straight line without fluctuation, it is determined that the tube is completely blocked or adheres to the wall. 8. Power supply unit: Low-power power supply resistant to ethylene oxide sterilization, suitable for single use; 9. The entire piece is molded as a single unit, sterilized with ethylene oxide, and can be used aseptically for single use.

[0007] Beneficial effects 1. Creative embedded structure: Flexible sensing is fully embedded and co-formed, with no protrusions, no detachment, and no contamination, overcoming the defects of external sensors; 2. Anti-clogging and sensor linkage: The sensor is located near the side hole, accurately judging the blockage, which is not a simple superposition of functions; 3. Sterilization compliant: Employs ethylene oxide-resistant sterilization power supply and a sealed structure, meeting disposable medical standards; 4. Accurate and reliable monitoring: It features zero-point calibration to eliminate drift, indirect sensing without contact with liquid, and stable accuracy; 5. Low power consumption and low cost: Sleep trigger mode, small battery size and low cost, suitable for lightweight mass production; 6. Safe and convenient to use: Automatic sound and light alarms, no external equipment required, reducing nursing burden and improving drainage safety. Attached Figure Description

[0008] Figure 1. Schematic diagram of the overall structure of a disposable drainage tube with pressure sensor. Figure 2 Schematic diagram of the front section structure of the tube body Figure 3 Schematic diagram of the sealing fixing seat structure Wherein: 1-pipe body; 2-pressure sensing unit; 3-sealing fixing seat; 4-drainage connector; 5-anti-clogging side hole; 6-warning module; 7-wire; 8-sealing adhesive layer Detailed Implementation

[0009] Example 1 The tube body (1) is made of medical-grade silicone flexible material; the pressure sensing unit (2) is a flexible thin film sensor, fully covered by a sealing layer (8), and integrally injection molded with the tube body (1), located near the anti-clogging side hole (5); the wire (7) is embedded in the tube wall, providing insulation and waterproofing; the sealing fixing seat (3) is a medical adhesive fixing seat; the anti-clogging side holes (5) are staggered and stepped; the warning module (6) has zero-point calibration and sleep wake-up; the power supply unit uses an ethylene oxide-resistant sterilized printed battery; the whole unit is ethylene oxide sterilized and individually aseptically packaged.

[0010] Example 2 Based on Example 1, the pressure sensing unit (2) adopts a MEMS piezoresistive sensor; the sealing fixing seat (3) adopts an airbag sealing structure, which is suitable for closed chest drainage; the warning module (6) determines that the side hole is blocked based on the continuous absence of pressure fluctuations and triggers an audible and visual prompt.

[0011] Example 3 Based on Example 1, the pressure sensing unit (2) adopts a fiber optic grating sensor; the power supply unit is a low-power passive trigger structure, which does not require a built-in battery and reduces costs; it automatically calibrates to zero atmospheric pressure before use and has no drift during long-term use.

[0012] Case The thoracic surgery department of a certain hospital used the drainage tube of this invention for closed thoracic drainage. The pressure sensing unit (2) is embedded in the design and is non-irritating and infection-free; the anti-blocking side hole (5) has a stepped structure to reduce blockage; the sensor is located near the side hole and immediately alerts to blockage and negative pressure abnormalities when the pressure is abnormal; the sealed fixing seat (3) is leak-proof and displacement-free; the whole is sterile and disposable, which significantly improves clinical safety and nursing efficiency.

Claims

1. A disposable drainage tube with pressure sensing, characterized in that, The device includes a tube body (1), a pressure sensing unit (2), a sealing and fixing seat (3), a drainage connector (4), an anti-clogging side hole (5), a warning module (6), a wire (7), a sealing layer (8), and a power supply unit. The tube body (1) is a medical flexible disposable sterile tube body with a drainage cavity inside. The pressure sensing unit (2) is a flexible pressure sensing device, which is fully covered and sealed by the sealing layer (8) and embedded in a preset position on the side wall of the tube body (1). It is located outside the drainage cavity and indirectly senses the pressure of the drainage area through the tube wall. The wire (7) is completely embedded in the wall of the tube body (1), and its two ends are connected to the pressure sensing unit (2) and the warning module (6) respectively. The outer surface of the wire is insulated and waterproof and does not protrude from the outer surface of the tube body (1). The sealing and fixing seat (3) is sleeved on the outer section of the tube body (1) to achieve surface sealing and positioning, and prevent leakage, displacement and infection. The drainage connector (4) is located on the tube body (1). At the end, it is used to connect with the negative pressure drainage device; the front wall of the tube body (1) has several anti-blocking side holes (5) and is connected to the drainage cavity. The anti-blocking side holes (5) are distributed in a stepped manner with small size at the proximal end and large size at the distal end along the axial direction of the tube body (1); the pressure sensing unit (2) is located at the proximal end of the anti-blocking side hole (5) and is used to monitor the pressure abnormality caused by the blockage of the side hole; The power supply unit is electrically connected to the warning module (6), which is configured to issue an audible and visual warning signal when the pressure is higher than the safety threshold or when the pressure is stable without fluctuation, based on a comparison between the pressure value and a preset threshold.

2. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The pressure sensing unit (2) is selected from thin-film pressure sensors, MEMS One type of piezoresistive sensor and fiber Bragg grating sensor.

3. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The pressure sensing unit (2) is flexibly conformally fitted to the tube body (1), without changing the flexibility of the tube body (1) and without irritating human tissue.

4. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The power supply unit is a miniature printed battery or a low-power passive trigger power supply that is resistant to ethylene oxide sterilization, and the whole system is sterilized with ethylene oxide.

5. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The sealing fixation seat (3) is a medical adhesive fixation seat or an airbag-type sealing seat, which can be adapted to seal and fix different wound sizes.

6. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The anti-blocking side holes (5) are distributed alternately in the circumferential and axial directions along the tube body (1). The small diameter at the proximal end prevents tissue aspiration, while the large diameter at the distal end ensures drainage flow.

7. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The drainage connector (4) is a standard Luer connector or a quick-release connector, which is compatible with clinical general negative pressure drainage devices.

8. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The tube body (1), pressure sensing unit (2), sealing fixing seat (3), and drainage connector (4) are all disposable aseptic structures, sterilized and packaged as a whole, and discarded after use.

9. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The warning module (6) has an atmospheric pressure zero calibration function, which automatically completes zero-point calibration before use to eliminate drift error.

10. The disposable drainage tube with pressure sensing according to claim 1, characterized in that, The warning module (6) adopts a low-power sleep trigger mode, which only wakes up the alarm when the pressure is abnormal, thus extending the usage time.

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