Stomach tube and sputum suction tube integrated nursing device with backflow prevention function

Abstract

A stomach tube and sputum suction tube integrated nursing device with a backflow prevention function comprises a main machine, a stomach tube and a sputum suction tube, the main machine comprises a sputum suction channel, and the sputum suction channel comprises a speed-adjustable negative pressure pump and a buffer cavity and is used for sucking sputum; the nutrient solution passage comprises a peristaltic pump and a flow sensor and is used for pouring a nutrient solution; a sputum breaking assembly is arranged in the sputum suction pipe and comprises a smashing impeller, a tungsten alloy balancing weight and a cleaning brush plate. A flexible shaft and a spiral brush are arranged in the stomach tube, the flexible shaft is connected to a two-degree-of-freedom driving mechanism in the main machine, and the two-degree-of-freedom driving mechanism comprises a rotating motor and a reciprocating motor which respectively drive the rotation and axial reciprocating motion of the flexible shaft and the spiral brush; a one-way valve is further arranged in the stomach tube. The problems of backflow risk, pipeline blockage and lack of a self-cleaning function existing in an existing stomach tube and sputum suction tube device are effectively solved.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and in particular relates to an integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function. Background Art

[0002] Existing gastric tubes and suction tube devices are widely used in hospitals, intensive care units and other fields, mainly for providing patients with nutrient solution infusion and sputum suction. However, the existing gastric tube and suction tube designs have some significant shortcomings, which affect the treatment effect and patient safety. First, in the prior art, gastric tubes and suction tubes are usually used independently, which means that each tube requires a separate connection and adjustment device, which not only increases the workload of nursing staff, but also increases the physical burden on patients. The need to insert and adjust two tubes each time causes unnecessary trouble and discomfort, especially when the position of the tubes needs to be adjusted frequently.

[0003] Existing gastric tube devices carry a risk of reflux, meaning that gastric fluid can flow back into the trachea due to changes in body position or negative pressure, leading to aspiration or misfeeding, increasing the risk to the patient. Some existing gastric tubes use one-way valves to prevent gastric fluid reflux, but these valves are not precise enough and are prone to clogging or obstruction, making them ineffective in preventing gastric fluid reflux and still failing to ensure patient safety.

[0004] Existing suction tubes often become clogged during long-term use, especially when a large amount of sputum and secretions are being sucked. Sputum is easily deposited in the suction tube, causing the tube to become clogged and reducing the suction effect. Although some devices provide simple cleaning solutions, most of these methods require manual operation and have limited effectiveness, and cannot guarantee that the tube is completely unobstructed after each use. Therefore, the existing technology has not yet been able to provide a gastric tube and suction tube integrated care device that can avoid reflux and has a self-cleaning function. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides an integrated gastric tube and sputum suction tube care device with anti-reflux function, which effectively solves the problems of reflux risk, pipe blockage and lack of self-cleaning function in existing gastric tube and sputum suction tube devices.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: An integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function, comprising: a main unit, a gastric tube and a sputum suction tube, The host comprises: a sputum suction passage, which comprises an adjustable speed negative pressure pump and a buffer chamber for sucking out sputum; a nutrient solution passage, which comprises a peristaltic pump and a flow sensor for perfusing nutrient solution; The sputum suction tube is provided with a sputum breaking component, which includes a crushing impeller, a tungsten alloy counterweight and a cleaning brush plate; A soft shaft and a spiral brush are provided in the gastric tube, and the soft shaft is connected to a dual-degree-of-freedom drive mechanism in the host. The dual-degree-of-freedom drive mechanism includes a rotary motor and a reciprocating motor, which respectively drive the rotation and axial reciprocating motion of the soft shaft and the spiral brush; a one-way valve is also provided in the gastric tube.

[0007] Preferably, the rotating shaft of the rotating motor and the flexible shaft are coaxially fixedly connected; a guide rail is fixedly connected inside the host, and the rotating motor is slidably connected inside the guide rail; The reciprocating motor is fixedly connected to the main machine, the rotating shaft of the reciprocating motor is fixedly connected to a reciprocating crank, the end of the reciprocating crank is hinged to a reciprocating connecting rod, and the end of the reciprocating connecting rod is hinged to the housing of the rotating motor.

[0008] Preferably, an annular mounting seat is provided at the end of the suction tube, the crushing impeller is rotatably connected to the center of the mounting seat, the rotating shaft of the crushing impeller is coaxially fixedly connected to a linkage shaft, and the linkage shaft is fixedly connected to the cleaning brush plate.

[0009] Preferably, the adjustable speed negative pressure pump comprises a brushless DC motor and a vortex vacuum generator, the speed of the brushless DC motor is adjusted by a PWM signal, and the adjustment range is 8000-15000 rpm; The buffer chamber is a cylindrical stainless steel shell with a spiral guide plate and a liquid-gas separation membrane inside. The pitch of the spiral guide plate is 1.2 times the diameter of the chamber. Also includes: The pressure sensor is installed at the outlet of the buffer chamber, with a measuring range of -100kPa to 0kPa and an accuracy of ±0.5kPa; The electromagnetic regulating valve is connected between the buffer chamber and the suction tube, and the valve core stroke is 5mm±0.1mm.

[0010] Preferably, the peristaltic pump comprises a three-roller extrusion mechanism driven by a stepper motor, the rollers are coated with medical silicone, the extrusion stroke is 3mm±0.1mm, and the delivery flow range is 10-300ml / h; The flow sensor is of ultrasonic type and includes a pair of transceiver transducers arranged at a 45° angle, with a measurement accuracy of ±1% FS. The signal output end is connected to the ADC sampling circuit of the main control board; The nutrient solution passage also includes a bubble detection module, which is composed of an infrared emitting tube and a photoelectric receiving tube, and has a detection sensitivity of Φ0.5mm bubbles.

[0011] Preferably, the tungsten alloy counterweight is a fan-shaped structure with a central angle of 90°±2°, and is fixed to the back of the crushing impeller at a radius of 2 / 3 from the axis by laser welding; the density of the counterweight is ≥16.5g / cm³, and the surface is coated with a 0.1mm thick medical silicone layer.

[0012] Preferably, the one-way valve is a duckbill check valve, which is made of medical silicone with a tapered closing structure, a closing angle of 45°±2°, and a wall thickness of 0.5mm±0.05mm.

[0013] Preferably, the flexible shaft is a multi-layer stainless steel wire twisted structure, with an outer wire diameter of 0.15mm±0.01mm, an inner wire diameter of 0.1mm±0.005mm, and a twisting pitch of 8 times the shaft diameter; The spiral brush is composed of a nickel-titanium alloy skeleton and bristles. The skeleton is in the shape of a spiral spring with a pitch of 12mm±0.5mm. It is fixed to the flexible shaft through radially distributed connecting rods, and the distance between adjacent connecting rods is 20mm±1mm. The bristles are planted on the outer surface of the skeleton in bundles, with a single bundle containing 8-10 bristles, a bristle diameter of 0.2mm±0.02mm, a length of 5mm±0.3mm, and an axial spacing of 3mm±0.2mm between adjacent bristle bundles; The connecting rod is a medical stainless steel wire with a diameter of 0.8 mm ± 0.05 mm, and both ends are fixed to the flexible shaft and the frame by laser welding.

[0014] Preferably, the linkage shaft is a flexible shaft woven with nickel-titanium alloy wires, which is woven by 16 superelastic nickel-titanium alloy wires with a diameter of 0.1mm±0.005mm in a 2×2 twisted manner, and the braiding pitch is 1.5mm±0.1mm; the cleaning brush plate is made of polyetheretherketone material with a thickness of 0.8mm±0.05mm, and is provided with staggered conical protrusions on the surface, with a protrusion height of 0.3mm±0.02mm, a bottom diameter of 0.2mm±0.01mm, and a spacing between adjacent protrusions of 0.5mm±0.05mm; the edge of the cleaning brush plate is provided with a circular chamfer with a chamfer radius of 0.2mm±0.02mm.

[0015] The present invention has a novel structure, ingenious design, and simple and convenient operation. Compared with the prior art, it has the following advantages: 1. This device integrates the suction tube and the gastric tube into the same main unit, achieving unified control of both functions. In the prior art, suction tubes and gastric tubes usually need to be used separately, and each tube needs to be connected and adjusted individually, which not only increases the complexity of operation but also causes more physical discomfort to the patient. The present invention separates the two and independently designs them, combines them with an integrated main unit and a precise control system, which not only improves operational convenience but also reduces unnecessary interference and patient discomfort.

[0016] 2. Existing gastric tubes can easily cause gastric contents to reflux when the patient's body position changes or when negative pressure changes, increasing the risk of aspiration. This device incorporates a one-way valve inside the gastric tube that remains open during gastric fluid discharge, preventing gastric contents from refluxing into the tube inlet or tubing system. This prevents aspiration and tube blockage caused by reflux, improving patient safety.

[0017] 3. Existing suction tubes often become clogged after a period of use due to sputum accumulation, affecting suction effectiveness. To address this issue, the present invention incorporates a sputum-breaking component within the suction tube, including a crushing impeller and a cleaning brush. This automatically removes sputum deposits during use, ensuring a clear, unobstructed tube and preventing blockages that can affect treatment effectiveness. This self-cleaning design also significantly reduces cleaning workload for caregivers and improves the stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axonometric diagram of the integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to the present invention.

[0019] Figure 2 The present invention provides an axonometric view of the flexible shaft and connecting components of an integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function.

[0020] Figure 3 This is an axonometric diagram of a rotating motor and connecting components of an integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to the present invention.

[0021] Figure 4 This is an axonometric view of part of the sputum suction tube of the integrated nursing device for a gastric tube and a sputum suction tube with both anti-reflux function according to the present invention.

[0022] Figure 5 This is an axonometric view of a pulverizing impeller and its connecting parts of an integrated nursing device for a gastric tube and a sputum suction tube with an anti-reflux function according to the present invention.

[0023] In the accompanying drawings: 1-main unit, 2-gastric tube, 3-suction tube, 4-flexible shaft, 5-rotating motor, 6-guide rail, 7-reciprocating connecting rod, 8-reciprocating crank, 9-reciprocating motor, 10-spiral brush, 11-mounting seat, 12-crushing impeller, 13-linkage shaft, 14-cleaning brush plate. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0025] like Figure 1-5As shown, the present invention provides an integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function. The device includes a main unit 1, a gastric tube 2 and a sputum suction tube 3. The main unit 1 contains two independent passages: a sputum suction passage and a nutrient solution passage. The sputum suction passage is equipped with an adjustable speed negative pressure pump and a buffer chamber to remove sputum from the patient's airway; the nutrient solution passage contains a peristaltic pump and a flow sensor for precise infusion of nutrient solution. The design of the main unit 1 ensures that the sputum suction and nutrient solution infusion functions are independent of each other, but can be coordinated through the same main unit to optimize nursing efficiency.

[0026] The suction tube 3 is equipped with a sputum-disintegrating assembly comprising a pulverizing impeller 12, a tungsten alloy counterweight, and a cleaning brush plate 14. The pulverizing impeller 12 rotates to pulverize sputum in the airway, while the counterweight, in conjunction with the impeller, ensures stable rotation. The cleaning brush plate 14 moves synchronously with the impeller, helping to remove sputum adhering to the tube wall during suctioning, keeping the tube unobstructed.

[0027] A flexible shaft 4 and a spiral brush 10 are provided within the gastric tube 2. The flexible shaft 4 is driven by a rotary motor 5 and a reciprocating motor 9 to achieve rotational and axial reciprocating motion. The rotary motor 5 is connected to a guide rail 6, allowing for sliding adjustment of the rotation angle and speed within a certain range, enabling the flexible shaft 4 and spiral brush 10 to operate efficiently. The rotating shaft of the reciprocating motor 9 is connected to the rotary motor 5 via a reciprocating crank 8 and a reciprocating connecting rod 7, enabling the axial reciprocating motion of the spiral brush 10, effectively cleaning the inner wall of the gastric tube. The spiral brush 10 is constructed of a nickel-titanium alloy frame and bristles, offering excellent wear resistance and elasticity, ensuring stability and durability for long-term use.

[0028] In addition, a one-way valve is provided inside the stomach tube 2. This valve is located at the outlet of the stomach tube 2 and is made of medical silicone material with good flexibility and sealing properties. The one-way valve remains open during gastric fluid discharge to prevent gastric contents from flowing back into the tube inlet.

[0029] The rotating shaft of the rotating motor 5 and the flexible shaft 4 are coaxially fixedly connected. The rotating motor 5 is directly connected to the flexible shaft 4 through the rotating shaft, which ensures that the rotational motion of the motor can be effectively transmitted to the flexible shaft 4, thereby realizing its rotational action. The rotational action of the flexible shaft 4 is the key to the cleaning function of the present device. The rotation of the flexible shaft drives the spiral brush 10 in the gastric tube to clean. The flexible shaft 4 adopts a multi-layer stainless steel wire twisted structure with high strength and flexibility, which ensures that it can stably transmit torque and adapt to different motion trajectories during rotation. Through the connection with the rotating motor 5, the flexible shaft 4 works at a higher speed, ensuring that the spiral brush 10 produces effective friction and cleaning effects in the gastric tube, removing residues in the tube wall.

[0030] A guide rail 6 is fixedly connected to the main unit 1, and the rotary motor 5 is slidably connected within this rail. The guide rail 6 provides stable guidance for the rotary motor 5, allowing for precise positioning and adjustment during operation. The guide rail 6 ensures smooth sliding of the motor, preventing poor operation due to unstable motor position. Through its sliding connection with the guide rail 6, the rotary motor 5 can be adjusted forward and backward within a certain range to accommodate different pipelines and operating requirements, precisely controlling the motion path of the flexible shaft 4. This design makes the device more flexible in use, adapting to the needs of patients of different body sizes while providing more efficient cleaning results.

[0031] The reciprocating motor 9 is fixedly connected to the main unit 1. The rotating shaft of the reciprocating motor 9 is fixedly connected to a reciprocating crank 8. The end of the reciprocating crank 8 is hinged with a reciprocating connecting rod 7. The end of the reciprocating connecting rod 7 is hinged to the housing of the rotary motor 5. The function of the reciprocating motor 9 is to drive the reciprocating crank 8 to swing back and forth. The reciprocating crank 8 is connected to the reciprocating connecting rod 7 through the hinge structure at its end, driving the connecting rod to reciprocate in the axial direction. The generation of this reciprocating motion can effectively drive the flexible shaft 4 to achieve axial reciprocating motion, thereby ensuring that the spiral brush 10 can cover more areas when performing cleaning work in the gastric tube and enhance the cleaning effect. The combination of the reciprocating motor and the rotary motor ensures that the flexible shaft 4 can achieve synchronous operation during the rotation and axial reciprocating process through precise linkage, effectively removing substances accumulated in the tube.

[0032] The end of the suction tube 3 is provided with an annular mounting base 11, and the crushing impeller 12 is rotatably connected to the center position of the mounting base 11. The mounting base 11 adopts a one-piece molded structure of medical plastic, and the inner ring is provided with a micro-bearing groove for accommodating the impeller shaft and providing stable support, so that the impeller can rotate smoothly around the central axis during the suction process. The crushing impeller 12 is a hollow and lightweight structure, and the blades adopt a 6-piece arc-shaped curved surface design with a curvature radius of 2mm±0.2mm, which is suitable for airflow drive. The impeller is not provided with an independent motor, but is driven by the negative pressure airflow formed during the suction process. That is, when the negative pressure pump of the main unit is started, the airflow in the suction tube flows rapidly from the distal end to the proximal end, and the negative pressure airflow passes through the impeller surface to generate thrust, driving it to rotate, forming a pneumatic drive structure similar to a "wind wheel", which has the advantages of simple structure and no need for additional power supply.

[0033] The rotating shaft of the pulverizing impeller 12 is coaxially fixedly connected to a linkage shaft 13. This linkage shaft 13 is rigidly connected to a cleaning brush plate 14, allowing the impeller 12 to rotate synchronously with the cleaning brush plate 14. The cleaning brush plate 14 is a circular sheet-like structure installed on the inner wall of the suction tube. Its surface is uniformly covered with multiple conical protrusions, which are used to scrape sputum and impurities adhering to the suction tube wall. During rotation, the brush plate lightly contacts the tube wall, continuously cleaning the inner wall through its rotational motion, effectively reducing sputum deposition and minimizing the risk of clogging.

[0034] The adjustable-speed negative pressure pump includes a brushless DC motor and a vortex vacuum generator. The brushless DC motor's speed is adjusted via a PWM signal within a range of 8,000-15,000 rpm. Brushless DC motors (BLDCs) offer high efficiency, low noise, and a long lifespan, making them suitable for use in equipment operating for extended periods. By controlling the motor speed via a PWM (pulse-width modulation) signal, the suction force of the negative pressure pump can be precisely adjusted to meet the needs of different patients. By adjusting the motor speed, the negative pressure pump can achieve varying degrees of negative pressure output, adapting to different clinical procedures and patient needs, thereby providing more flexible suction capabilities.

[0035] The output of the negative pressure pump is connected to the suction tube via a pipe, drawing sputum or secretions from the airway into the pump body. A vortex vacuum generator within the pump body draws in air and sputum through a rotating impeller and discharges them through the air channel. The design of the vortex vacuum generator ensures a stable negative pressure output during operation, preventing fluctuations in negative pressure that can affect suction effectiveness.

[0036] The buffer chamber is a cylindrical stainless steel shell with a spiral guide plate and a liquid-gas separation membrane inside. The pitch of the spiral guide plate is 1.2 times the diameter of the cavity. The buffer chamber is located between the negative pressure pump and the suction tube. Its function is to stabilize the negative pressure output and avoid the instantaneous pressure fluctuations generated when the negative pressure pump outputs affecting the suction effect. The design of the spiral guide plate increases the flow resistance of the airflow, causing the airflow to rotate in the buffer chamber, thereby effectively separating the liquid and gas and ensuring that the airflow in the suction tube is not blocked by the liquid. At the same time, the liquid-gas separation membrane can further improve the separation efficiency of liquid and gas, prevent the liquid from entering the suction tube with the airflow, and ensure that the suction tube is unobstructed.

[0037] A pressure sensor is also installed at the outlet of the buffer chamber, with a range of -100kPa to 0kPa and an accuracy of ±0.5kPa. This pressure sensor monitors the negative pressure within the buffer chamber in real time and feeds the measured signal back to the main control system. If the negative pressure is too high or too low, the system automatically adjusts the operating state of the negative pressure pump to maintain negative pressure stability.

[0038] In addition, a solenoid control valve with a valve core stroke of 5mm ± 0.1mm is installed between the buffer chamber and the suction tube. This solenoid control valve precisely adjusts the airflow rate, ensuring stable airflow during suction. Through electromagnetic control, the valve can quickly respond to different operational requirements, ensuring accurate and flexible negative pressure regulation.

[0039] The peristaltic pump includes a three-roller extrusion mechanism driven by a stepper motor. The rollers are coated with medical silicone, have an extrusion stroke of 3mm±0.1mm, and deliver a flow rate range of 10-300ml / h. Driven by a stepper motor, the peristaltic pump precisely controls the flow rate and ensures uniform delivery of the nutrient solution. The three-roller extrusion mechanism squeezes the nutrient solution through contact between the rollers and the tubing. By adjusting the stepper motor speed, the flow rate can be precisely controlled to meet the nutritional needs of different patients.

[0040] The flow sensor is ultrasonic and consists of a pair of transceiver transducers arranged at a 45-degree angle. Its measurement accuracy is ±1%FS, and its signal output is connected to the ADC sampling circuit on the main control board. Using ultrasonic technology, the flow sensor detects the flow rate of liquid flowing through the pipe, accurately measuring the delivery flow rate and ensuring accurate infusion of the nutrient solution.

[0041] The nutrient solution pathway also includes a bubble detection module, comprised of an infrared emitting tube and a photoelectric receiving tube, with a detection sensitivity of 0.5mm bubbles. This module can detect bubbles in the nutrient solution in real time, preventing them from entering the patient's body and potentially causing harm. The opposing infrared emitting and receiving tubes ensure highly sensitive bubble detection, safeguarding the patient's safety while receiving the nutrient solution.

[0042] The tungsten alloy counterweight is a fan-shaped structure with a central angle of 90°±2°. It is fixed to the back of the crushing impeller 12 by laser welding, at a radius of 2 / 3 from the impeller axis. The tungsten alloy counterweight is designed with high density (density ≥16.5g / cm³), which enables it to effectively balance the rotation of the impeller and avoid vibration or instability caused by uneven center of gravity. Tungsten alloy material has high density and excellent wear resistance, and can withstand long-term high-speed rotation to ensure that the impeller maintains smooth operation during operation. The surface of the counterweight is coated with a 0.1mm thick layer of medical silicone, which not only increases the friction between the counterweight and the impeller to ensure its stability, but also prevents direct contact between metal parts, reduces possible damage or corrosion, and improves the durability and safety of the equipment.

[0043] The one-way valve, located within the gastric tube 2, adopts a duckbill check valve design. Made of medical silicone, it features a tapered end with a 45°±2° angle and a wall thickness of 0.5mm±0.05mm. This one-way valve prevents gastric reflux during gastric tube use. When the peristaltic pump is activated, gastric contents are pushed out, and the valve remains open. When the peristaltic pump stops, the valve automatically closes, preventing gastric contents from flowing back into the tube inlet.

[0044] The flexible shaft 4 utilizes a multi-layered stainless steel wire twisted structure, with an outer wire diameter of 0.15mm ± 0.01mm and an inner wire diameter of 0.1mm ± 0.005mm. The twist pitch is 8 times the shaft diameter. The flexible shaft's multi-layer structure and precise twisting design enhance its tensile strength and flexibility, enabling stable torque transmission during rotation and ensuring the spiral brush's cleaning effect within the gastric tube. The larger outer wire diameter provides the necessary strength, while the thin inner filaments enhance its flexibility, enabling the flexible shaft to move flexibly within complex pipe paths.

[0045] The spiral brush 10 is composed of a nickel-titanium alloy skeleton and bristles. The skeleton is in the shape of a spiral spring with a pitch of 12mm±0.5mm, and is fixed to the flexible shaft 4 by radially distributed connecting rods. The design of the spiral brush combines the spring-shaped skeleton with the flexible shaft so that the bristles can fully contact the inner wall of the gastric tube during rotation and axial movement, thereby effectively cleaning. The pitch design of the skeleton ensures that the bristles can cover a larger area when moving in the gastric tube, thereby improving the cleaning efficiency. The bristles are made of nickel-titanium alloy material, which has extremely high corrosion resistance and wear resistance and can maintain good performance during long-term use. The bristles are implanted in bundles on the outer surface of the skeleton. A single bundle contains 8-10 bristles with a bristle diameter of 0.2mm±0.02mm and a length of 5mm±0.3mm. The axial spacing between adjacent bristle bundles is 3mm±0.2mm. This bristle design can effectively remove dirt and debris from the inner wall of the gastric tube, ensuring that the performance of the equipment will not be affected by blockage or sediment during long-term use.

[0046] The linkage shaft 13 is a flexible shaft braided from nickel-titanium alloy wire. It is composed of 16 superelastic nickel-titanium alloy wires with a diameter of 0.1mm±0.005mm, twisted in a 2×2 pattern with a braiding pitch of 1.5mm±0.1mm. This flexible shaft design ensures that the linkage shaft maintains sufficient rigidity to transmit power while also possessing a high degree of flexibility to accommodate complex motion paths. This structure enables the linkage shaft to precisely drive the cleaning brush plate 14, ensuring effective cleaning of the interior of the suction tube.

[0047] The cleaning brush plate 14 is made of polyetheretherketone material with a thickness of 0.8mm±0.05mm. The surface is provided with staggered conical protrusions with a protrusion height of 0.3mm±0.02mm, a bottom diameter of 0.2mm±0.01mm, and a spacing between adjacent protrusions of 0.5mm±0.05mm. Driven by the linkage shaft 13, the cleaning brush plate 14 can move along the inner wall of the suction tube to remove sputum and impurities generated during the suction process and ensure the patency of the suction tube. The conical protrusion design on the surface of the brush plate can effectively increase the contact area with the tube wall, enhance the cleaning effect, and reduce the damage to the inner wall of the pipe caused by friction. The edge of the cleaning brush plate is provided with a circular chamfer with a chamfer radius of 0.2mm±0.02mm to reduce the stress concentration generated when in contact with the pipe, extend the service life and improve the safety of operation.

[0048] When using this device, ① insert the gastric tube and suction tube into the patient's nasal cavity or oral cavity respectively, and guide the gastric tube into the stomach and the suction tube into the airway according to the clinical pathway to ensure the accuracy of the intubation position. The placement of the tubes can be confirmed with the help of images or guidance; ② connect the connecting ends of the two tubes to the nutrient solution channel interface and the suction channel interface on the host respectively. After the connection is completed, check the sealing of the interface to prevent air leakage and liquid leakage; ③ turn on the power of the host and set the peristaltic pump infusion parameters through the control panel or touch screen, including flow rate (such as 100ml / h), infusion time, alarm threshold, etc.; ④ set the negative pressure pump according to the thickness of the patient's sputum. ⑤ During the infusion or suction process, the host automatically monitors the pressure, flow and bubble signals. If any abnormal parameters occur, the system will issue an alarm through a buzzer or indicator light. ⑥ Nursing staff regularly start the soft shaft drive module as needed to make the spiral brush rotate and reciprocate inside the gastric tube to clean the tube, keep the lumen unobstructed, and prevent the deposition of residual nutrient solution. ⑦ At the end of each day or shift, disconnect the tube, pull out the catheter, and discard the disposable components in accordance with aseptic specifications. Clean and maintain the host and record usage data.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitute similar methods to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. An integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function, characterized in that: include: Host (1), gastric tube (2) and suction tube (3), The host (1) comprises: a sputum suction passage, which comprises a speed-adjustable negative pressure pump and a buffer chamber for sucking out sputum; and a nutrient solution passage, which comprises a peristaltic pump and a flow sensor for perfusing nutrient solution; The sputum suction tube (3) is provided with a sputum breaking component inside, and the sputum breaking component includes a crushing impeller (12), a tungsten alloy counterweight block and a cleaning brush plate (14); A flexible shaft (4) and a spiral brush (10) are provided in the stomach tube (2). The flexible shaft (4) is connected to a dual-degree-of-freedom drive mechanism in the host (1). The dual-degree-of-freedom drive mechanism comprises a rotary motor (5) and a reciprocating motor (9), which respectively drive the rotation and axial reciprocating motion of the flexible shaft (4) and the spiral brush (10). A one-way valve is also provided in the stomach tube (2).

2. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The rotating shaft of the rotating motor (5) and the flexible shaft (4) are coaxially fixedly connected; a guide rail (6) is fixedly connected inside the host (1), and the rotating motor (5) is slidably connected inside the guide rail (6); The reciprocating motor (9) is fixedly connected to the main machine (1), the rotating shaft of the reciprocating motor (9) is fixedly connected to a reciprocating crank (8), the end of the reciprocating crank (8) is hinged to a reciprocating connecting rod (7), and the end of the reciprocating connecting rod (7) is hinged to the housing of the rotating motor (5).

3. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: An annular mounting seat (11) is provided at the end of the sputum suction tube (3), and the crushing impeller (12) is rotatably connected to the center of the mounting seat (11). The rotating shaft of the crushing impeller (12) is coaxially fixedly connected to a linkage shaft (13), and the linkage shaft (13) is fixedly connected to the cleaning brush plate (14).

4. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The adjustable speed negative pressure pump comprises a brushless DC motor and a vortex vacuum generator, wherein the speed of the brushless DC motor is adjusted by a PWM signal within a range of 8000-15000 rpm; The buffer chamber is a cylindrical stainless steel shell with a spiral guide plate and a liquid-gas separation membrane inside. The pitch of the spiral guide plate is 1.2 times the diameter of the chamber. Also includes: The pressure sensor is installed at the outlet of the buffer chamber, with a measuring range of -100kPa to 0kPa and an accuracy of ±0.5kPa; The electromagnetic regulating valve is connected between the buffer chamber and the sputum suction tube (3), and the valve core stroke is 5mm±0.1mm.

5. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The peristaltic pump includes a three-roller extrusion mechanism driven by a stepper motor. The rollers are coated with medical silicone, the extrusion stroke is 3mm±0.1mm, and the delivery flow range is 10-300ml / h; The flow sensor is of ultrasonic type and includes a pair of transceiver transducers arranged at a 45° angle, with a measurement accuracy of ±1% FS. The signal output end is connected to the ADC sampling circuit of the main control board; The nutrient solution passage also includes a bubble detection module, which is composed of an infrared emitting tube and a photoelectric receiving tube, and has a detection sensitivity of Φ0.5mm bubbles.

6. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The tungsten alloy counterweight is a fan-shaped structure with a central angle of 90°±2° and is fixed to the back of the crushing impeller (12) at a radius of 2 / 3 from the axis by laser welding; the density of the counterweight is ≥16.5g / cm³ and the surface is coated with a 0.1mm thick medical silicone layer.

7. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The one-way valve is a duckbill check valve made of medical silicone with a tapered closing structure, a closing angle of 45°±2°, and a wall thickness of 0.5mm±0.05mm.

8. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 1, characterized in that: The flexible shaft (4) is a multi-layer stainless steel wire twisted structure, with an outer wire diameter of 0.15 mm ± 0.01 mm, an inner wire diameter of 0.1 mm ± 0.005 mm, and a twisting pitch of 8 times the shaft diameter; The spiral brush (10) is composed of a nickel-titanium alloy skeleton and bristles. The skeleton is in the shape of a spiral spring with a pitch of 12 mm ± 0.5 mm. It is fixed to the flexible shaft (4) through radially distributed connecting rods, and the distance between adjacent connecting rods is 20 mm ± 1 mm. The bristles are planted on the outer surface of the skeleton in bundles, with a single bundle containing 8-10 bristles, a bristle diameter of 0.2mm±0.02mm, a length of 5mm±0.3mm, and an axial spacing of 3mm±0.2mm between adjacent bristle bundles; The connecting rod is a medical stainless steel wire with a diameter of 0.8 mm ± 0.05 mm, and its two ends are fixed to the flexible shaft (4) and the frame respectively by laser welding.

9. The integrated nursing device for a gastric tube and a sputum suction tube with anti-reflux function according to claim 3, characterized in that: The linkage shaft (13) is a flexible shaft braided with nickel-titanium alloy wires, which is braided in a 2×2 twisted manner with 16 superelastic nickel-titanium alloy wires with a diameter of 0.1mm±0.005mm, and a braiding pitch of 1.5mm±0.1mm; the cleaning brush plate (14) is made of polyetheretherketone material with a thickness of 0.8mm±0.05mm, and is provided with staggered conical protrusions on the surface, with a protrusion height of 0.3mm±0.02mm, a bottom diameter of 0.2mm±0.01mm, and a spacing between adjacent protrusions of 0.5mm±0.05mm; the edge of the cleaning brush plate (14) is provided with an arc chamfer with a chamfer radius of 0.2mm±0.02mm.

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