pressure measuring drainage tube

Abstract

The present application provides a pressure measuring drainage tube, which comprises a drainage head tube placed in a drainage cavity, a drainage tail tube placed at the edge of the drainage cavity and penetrating out of the drainage cavity, and a pressure sensing connecting tube arranged between the drainage tube head and the drainage tube tail; the pressure sensing connecting tube is annularly wrapped with a pressure sensing balloon, a pressure measuring tube is arranged at the tail of the drainage tail tube and connected with the pressure sensing balloon, and a pressure sensor is arranged at the end of the pressure measuring tube; when medical drainage is performed, the pressure sensing balloon pressure is monitored to timely find and dredge the blocked drainage, ensure smooth drainage, or timely find the abnormal pressure rise in the drainage cavity to avoid the risk caused by compression, and the structure is simple, the cost is low, the practicality is strong, and the effect is reliable.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to pressure-measuring drainage tubes. Background Technology

[0002] Cavity drainage is a commonly used medical technique, prevalent in both surgical and internal medicine treatments. In surgery, it is primarily used to drain bleeding and exudate from surgical wounds within body cavities. Observing changes in the characteristics and volume of the drainage fluid helps assess postoperative recovery and allows for timely intervention in case of changes. In internal medicine, it is mainly used for conditions involving effusions within body cavities, such as pleural effusion, ascites, and pericardial effusion.

[0003] Maintaining unobstructed drainage is extremely important. It prevents fluid accumulation in the drainage cavity, promotes healing, and allows for the timely detection and emergency treatment of drainage crises, such as emergency secondary surgery to stop postoperative hemorrhage. Obstructed drainage is extremely detrimental to recovery, not only posing a potential risk of infection but also potentially leading to increased pressure in the drainage cavity, compressing nearby tissues or organs, and causing critical conditions. For example, obstructed thyroid drainage can cause tracheal compression leading to asphyxiation; obstructed pericardial drainage can compress the heart, causing decreased cardiac pumping function and cardiac arrest; and obstructed thoracic and abdominal drainage can cause increased thoracic pressure, compressing the lungs and causing restrictive ventilatory impairment, leading to decreased oxygenation and hypoxia.

[0004] To improve drainage safety, there is an urgent clinical need for a drainage tube that can monitor changes in pressure within the drainage cavity, promptly detect blockages, facilitate timely unblocking, and accurately assess the drainage condition. Summary of the Invention

[0005] To address the aforementioned deficiencies in the prior art, this invention provides a pressure-measuring drainage tube, comprising a drainage head tube placed within a drainage cavity, a drainage tail tube extending out of the drainage cavity, and a pressure-sensing connecting tube disposed between the drainage head tube and the drainage tail tube, all connected in sequence; the inner cross-sections of the pressure-sensing connecting tube and the drainage head tube are identical, both being 0-2 mm smaller than those of the drainage tail tube; the outer wall cross-section of the pressure-sensing connecting tube is smaller than that of the outer wall of the drainage head tube, and the outer wall cross-section of the drainage head tube is not larger than that of the outer wall of the drainage tail tube;

[0006] A pressure-sensing balloon is annularly wrapped around the outer wall of the pressure-sensing connecting tube. A pressure-sensing tube is connected to the pressure-sensing balloon, and a pressure sensor is installed at the end opening of the drainage tail tube side wall.

[0007] Furthermore, the drainage head tube, drainage tail tube, and pressure-sensing connection tube are all round tubes or flat tubes.

[0008] Furthermore, the drainage head tube is configured as a drainage groove strip, which includes a drainage support strip and three drainage support wings disposed on the side of the drainage support strip; the long axis of the three drainage support wings is in the same direction as the drainage support strip, and the recesses between adjacent drainage support wings form three drainage grooves; the drainage tail tube and the pressure-sensing connecting tube are both round tubes.

[0009] Furthermore, the drainage head tube consists of two equally thick circular tubes separated at the head and side, and the drainage tail tube and the pressure-sensing connecting tube are both flat tubes of the same shape; the lumens of the two circular drainage head tubes run parallel and are connected to the pressure-sensing connecting tube.

[0010] Alternatively; the drainage head tube is two identical flat tubes of the same size, separated at the head and side, and the drainage tail tube and the pressure-sensing connecting tube are both identical flat tubes. The flat surfaces of the drainage head tubes at the tail ends of the two flat tubes are arranged in close contact with each other and connected to the pressure-sensing connecting tube.

[0011] Furthermore, the drainage head tube consists of two identical drainage groove strips separated on the head side, and the drainage tail tube and the pressure-sensing connecting tube are both identical flat tubes.

[0012] The two drainage groove strips are arranged with their tail ends touching, and all of their drainage grooves are connected to the pressure-sensing connecting pipe. The sum of the cross-sectional areas of the drainage grooves of the two drainage groove strips is not greater than the cross-sectional area of ​​the inner cavity of the pressure-sensing connecting pipe.

[0013] Furthermore, the pressure sensor includes a pressure-sensing shell and an elastic corrugated wall cylinder. The inner wall of the distal end of the pressure-sensing shell is connected to the opening of the elastic corrugated wall cylinder in an annular seal. The pressure-sensing sealing cavity formed by the inner wall of the pressure-sensing shell and the outer wall of the elastic corrugated wall cylinder is connected to the pressure-sensing tube. An elastic valve injection port is provided in the pressure-sensing sealing cavity.

[0014] Alternatively, the pressure sensor may include an electronic pressure sensor, a power supply, a display screen, and an alarm; a spring valve injection port is provided in the pressure sensing tube and connected to the electronic pressure sensor.

[0015] Furthermore, the pressure sensor is configured as an electronic pressure sensor, and a data storage device is electrically connected to the electronic pressure sensor.

[0016] Furthermore, the pressure sensor is configured as an electronic pressure sensor, and a data transmitter is electrically connected to several pressure sensors; a data storage and monitoring center is signal connected to several data transmitters, and an alarm is installed in the data storage and monitoring center.

[0017] Furthermore, the drainage support strip is provided with a drainage sampling cavity through its long axis. One side of the drainage sampling cavity opens at the free end of the drainage support strip, and the other side extends out of the tail of the drainage support strip and is connected to a sampling tube. The sampling tube extends out of the side wall of the drainage tail tube and is provided with a sampling port at the free end. The sampling port includes a spring valve port.

[0018] Furthermore, a drainage sampling cavity is provided through the side wall of the drainage head tube of the round or flat tube along its long axis. One side of the drainage sampling cavity opens into the free end of the drainage head tube of the round or flat tube, and the other side exits the tail of the drainage head tube of the round or flat tube and is connected to a sampling tube. The sampling tube passes through the side wall of the drainage tail tube and is provided with a sampling port at the free end. The sampling port includes a spring valve port.

[0019] The beneficial effects of this invention are:

[0020] 1. A pressure-sensing balloon is installed by wrapping the outer wall of the pressure-sensing connecting tube at the tail end of the drainage head tube. The position will not affect the drainage head tube during drainage. The length of the drainage head tube can be arbitrarily cut according to clinical needs during surgical drainage to adapt to the drainage needs of different body cavities.

[0021] 2. The outer wall of the pressure-sensing connecting tube is smaller than that of the drainage head tube and the drainage tail tube, making it easy to pull out after drainage is completed;

[0022] 3. The dual-headed drainage tube design can be used for drainage in different locations within a larger body cavity, avoiding the need for two drainage tubes, which would increase patient discomfort and harm.

[0023] 4. The outer wall of the pressure-sensing connecting tube is smaller than that of the drainage head tube and the drainage tail tube. Under extremely low pressure, a large amount of gas can be filled into the pressure-sensing balloon. Combined with the thinner pressure-sensing outer shell and the elastic corrugated wall tube, the pressure change inside the drainage cavity can be accurately observed.

[0024] 5. By combining electronic pressure sensors, data storage devices, data transmitters, and data storage monitoring centers, it is possible to trace changes in drainage pressure, achieve one-to-many central monitoring, facilitate the diagnosis of the condition, and reduce the workload of medical staff;

[0025] 6. The sampling tube can accurately sample deep into the body cavity, avoiding sample contamination. It is used to test the properties of the sampled fluid, culture bacteria, and select sensitive antibiotics.

[0026] 7. Simple structure, low cost, and easy to promote. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the second embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the third embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the fourth embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the fifth embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the sixth embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of one embodiment of the pressure sensor of the present invention;

[0034] Figure 8This is a schematic diagram illustrating the use of an electronic pressure sensor for central monitoring in this invention.

[0035] Figure 9 This is a schematic diagram of the seventh embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the eighth embodiment of the present invention;

[0037] In the picture,

[0038] 1. Drainage head tube; 2. Drainage tail tube; 3. Pressure-sensing connection tube; 31. Pressure-sensing balloon; 32. Pressure-sensing tube; 33. Pressure sensor; 34. Elastic corrugated wall tube; 35. Pressure-sensing outer shell; 36. Pressure-sensing sealing cavity; 37. Elastic valve injection port; 4. Drainage groove strip; 41. Drainage support strip; 42. Drainage support wing; 43. Drainage groove; 44. Drainage sampling cavity; 45. Sampling tube; 46. Sampling port. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0040] like Figure 1-6 , Figure 9-10 As shown, the pressure-measuring drainage tube of this invention includes a drainage head tube 1 placed inside the drainage cavity, a drainage tail tube 2 placed at the edge of the drainage cavity and extending out of the drainage cavity, and a pressure-sensing connecting tube 3 disposed between the drainage head tube 1 and the drainage tail tube 2. After surgery, the accumulated fluid (exudate and blood) in the drainage cavity is drained through 1-2 drainage head tubes 1 placed inside the drainage cavity. The tips of the pressure-sensing connecting tube 3 and the drainage tail tube 2 are placed inside the drainage cavity near the skin or mucosa. The drainage tail tube 2 extending out of the drainage cavity is sutured and fixed near the skin outside the drainage cavity. The drainage fluid in the drainage cavity enters the pressure-sensing connecting tube 3 through the drainage head tube 1, enters the drainage tail tube 2, and finally enters the drainage container connected to the drainage tail tube 2.

[0041] The cross-sectional area of ​​the pressure-sensing connecting tube 3 and the drainage head tube 1 is the same, both being 0-2 mm smaller than the drainage tail tube 2. When the drainage fluid flows out, it passes sequentially from the drainage head tube 1 → pressure-sensing connecting tube 3 → drainage tail tube 2, without the inner cavity becoming smaller, or even slightly larger. This is significant because the inner cavity enlarges when entering the drainage tail tube 2, preventing solid particles (mainly blood clots) in the drainage fluid from blocking the drainage path during outflow.

[0042] The cross-sectional area of ​​the outer wall of the pressure-sensing connecting tube 3 and the outer wall of the drainage head tube 1 is not larger than the cross-sectional area of ​​the outer wall of the drainage tail tube 2. The overall shape from the drainage tail tube 2 → pressure-sensing connecting tube 3 → drainage head tube 1 does not increase in size, or decreases slightly. This is significant because it ensures that at the end of drainage, the ends of the drainage tail tube 2, pressure-sensing connecting tube 3, and drainage head tube 1 can be smoothly and sequentially pulled out from the drainage cavity and the skin drainage perforation. This avoids mechanical jamming when pulling out the drainage tail tube 2 and pressure-sensing connecting tube 3 due to increased size, and reduces discomfort during tube removal.

[0043] The cross-sectional area of ​​the outer wall of the pressure-sensing connecting tube 3 is smaller than that of the outer wall of the drainage head tube 1 and the drainage tail tube 2. The outer wall of the pressure-sensing connecting tube 3 forms an annular depression between the drainage head tube 1 and the drainage tail tube 2. A pressure-sensing balloon 31 is annularly wrapped around the outer wall of the pressure-sensing connecting tube 3. The pressure-sensing balloon 31 is located in the annular depression between the drainage head tube 1 and the drainage tail tube 2. The head and tail sides of the pressure-sensing balloon 31 are bonded and fixed to the outer walls of the head and tail ends of the pressure-sensing connecting tube 3. The area of ​​the pressure-sensing balloon 31 is larger than the area of ​​the outer wall of the pressure-sensing connecting tube 3 covered by its balloon wall. It is in a relaxed state in its natural state when it is not inflated or only slightly inflated.

[0044] Its significance lies in:

[0045] 1. Inflate the pressure-sensitive balloon 31 with an appropriate amount of gas. The side wall of the pressure-sensitive balloon 31 will bulge, slightly higher or horizontal to the outer wall of the drainage head tube 1 and the drainage tail tube 2, forming an annular depression within the drainage cavity between the drainage head tube 1 and the drainage tail tube 2. A sac cavity for the pressure-sensitive connecting tube 3 will be formed between the outer wall of the pressure-sensitive connecting tube 3 and the inner wall of the pressure-sensitive balloon 31. Supported by the relatively thick drainage head tube 1 and drainage tail tube 2 on both sides, the sac cavity of the pressure-sensitive balloon 31 receives very little pressure from the surrounding tissues, and can more accurately reflect the pressure of the fluid in the drainage cavity. The length of the annular depression between the drainage head tube 1 and the drainage tail tube 2 and the length of the pressure-sensitive balloon 31 should not be too long, preferably less than 3 cm.

[0046] 2. The annular recess between the drainage head tube 1 and the drainage tail tube 2 ensures that after the side wall of the pressure-sensing balloon 31 bulges, the outer wall of the pressure-sensing connecting tube 3 and the side wall of the pressure-sensing balloon 31 form a slightly larger space. When the pressure of the drainage cavity changes, the gas inside the pressure-sensing balloon 31 has a certain space for compression and deformation, which can more accurately convert the pressure change of the drainage cavity into the gas pressure inside the pressure-sensing balloon 31. The length of the annular recess between the drainage head tube 1 and the drainage tail tube 2 and the pressure-sensing balloon 31 should not be too short, and it is best to be greater than 2cm.

[0047] A pressure-sensing balloon 31 is annularly wrapped around the outer wall of the pressure-sensing connecting tube 3. A pressure-sensing tube 32 is connected to the pressure-sensing balloon 31. A pressure sensor 33 is installed at the end opening of the pressure-sensing tube 32, which exits from the side wall of the drainage tail tube 2. The pressure-sensing tube 32 is embedded in the side wall of the pressure-sensing connecting tube 3 in the corresponding section. After exiting the tail end of the pressure-sensing connecting tube 3, it is free and contained in the cavity of the drainage tail tube 2. Finally, it passes through the side wall of the drainage tail tube 2, extends 3-5 cm, and then has a pressure sensor 33 installed at the end opening. The pressure sensor 33 is externally connected to the pressure-sensing balloon 31 in the drainage cavity through the pressure-sensing tube 32, sensing and displaying the pressure changes in the drainage cavity.

[0048] Thus, when the pressure in the drainage cavity changes, it acts on the outer wall of the pressure-sensing balloon 31. The compression or expansion of the balloon wall causes a corresponding change in the gas pressure inside the balloon, which is then transmitted to the pressure sensor 33 via the pressure-sensing tube 32. To reduce the attenuation effect of the gas volume inside the pressure-sensing tube 32 on the pressure change, the inner cavity of the pressure-sensing tube 32 should be relatively narrow, but it is essential to ensure the unobstructed flow of the pressure-sensing balloon 31 and the pressure sensor 33. In practice, the inner cavity of the pressure-sensing tube 32 is ideally circular, with an inner diameter of 0.5-1 mm. The length of the pressure-sensing tube 32 should be as short as possible, and the gas space within the pressure sensor 33 for sensing pressure should also be as small as possible. When observing the pressure sensor 33, the patient should be in a relatively resting state to avoid interference with pressure transmission caused by patient movement. If the patient is not at rest, the pressure sensor 33 should be observed 2-3 minutes after the patient returns to a resting state.

[0049] During drainage, a pressure-sensing balloon 31 is placed at key locations within the drainage cavity where pressure monitoring is required. Examples include: in thyroid surgery, it is placed anterior to the trachea; in thoracic surgery, it is placed at the bottom of the thoracic cavity within the chest wall; in spinal surgery, it is placed near the nerve root; in craniocerebral surgery, it is placed subdurally (intracerebral surgery) or superiorly (epidural surgery); and in gastrointestinal surgery, it is placed near the circular suture site. This allows for monitoring of the pressure on important tissues or organs within the drainage cavity. The significance of this is: 1. Timely unblocking of drainage obstructions; 2. If unblocking is not possible, monitoring the pressure on important tissues or organs, and timely intervention if the pressure is too high to avoid serious complications. See the background technology section for details, which will not be elaborated here.

[0050] The pressure-sensing connecting tube 3 is located at the head end of the drainage tail tube 2. The pressure-sensing balloon 31 and the pressure-sensing connecting tube 3 are in the same position. During the specific drainage operation, the pressure-sensing balloon 31 is placed in the drainage cavity adjacent to important tissues or organs. If the length of the drainage head tube 1 on the head side of the pressure-sensing connecting tube 3 is too long, the head section of the drainage head tube 1 can be appropriately trimmed to ensure that the length of the drainage head tube 1 is appropriate to the length of the drainage cavity. The distance between the tail side of the pressure-sensing connecting tube 3 and the skin can be adjusted by inserting the head side of the drainage tail tube 2 into the drainage cavity to ensure that the pressure-sensing balloon 31 can be placed in the optimal position under any circumstances and fixed at the point where the drainage tail tube 2 passes through the skin.

[0051] Before drainage, the pressure-sensitive balloon 31 contains a small amount of gas. The inner wall of the pressure-sensitive balloon 31 is not tightly attached to the outer wall of the pressure-sensitive connecting tube 3 to avoid adhesion between the inner wall of the pressure-sensitive balloon 31 and the outer wall of the pressure-sensitive connecting tube 3. The balloon wall of the pressure-sensitive balloon 31 is also not in an inflated state to avoid stress aging of the balloon wall and affecting its pressure-sensing performance.

[0052] During drainage, the pressure-sensitive balloon 31 is in its extreme natural state, that is, under the premise that the gas pressure inside the pressure-sensitive balloon 31 is 0-2 cmH2O, the pressure-sensitive balloon 31 is inflated to the maximum extent so that the gas content inside the pressure-sensitive balloon 31 reaches the maximum state, and the balloon wall of the pressure-sensitive balloon 31 does not enter the expansion state or is only slightly expanded.

[0053] Specifically, after the drainage tube is placed and securely fixed, before starting drainage, the pressure-sensing balloon 31 is inflated to a pressure limit of less than 2 cmH2O. The balloon wall of 31 separates from the outer wall of the pressure-sensing connecting tube 3, forming a certain volume of air-filled space to sense pressure changes within the drainage cavity. These pressure changes are transmitted to the gas inside the balloon 31 through its soft, thin wall, causing synchronized changes in gas pressure to match the drainage cavity pressure. The cross-sectional area of ​​the outer wall of the pressure-sensing balloon 31 after inflation to a pressure limit of less than 2 cmH2O is slightly larger than or equal to the cross-sectional area of ​​the outer wall of the drainage tail tube 2, minimizing pressure interference caused by surrounding tissues compressing the balloon 31.

[0054] After drainage is completed, the pressure-sensing balloon 31 is aspirated and emptied. The balloon wall of the pressure-sensing balloon 31 is attached to the outer wall of the pressure-sensing connecting tube 3. The cross-section of the outer wall of the pressure-sensing balloon 31 is not larger than the cross-section of the outer wall of the drainage head tube 1, which facilitates the removal of the pressure-sensing connecting tube 3 and the drainage head tube 1.

[0055] Furthermore, such as Figure 1 As shown, the drainage head tube 1, drainage tail tube 2, and pressure-sensing connecting tube 3 are all circular tubes. The inner diameters of the drainage head tube 1 and pressure-sensing connecting tube 3 are equal, both 0-2 mm smaller than the inner lumen of the drainage tail tube 2. The outer diameter of the drainage head tube 1 is 0.5-1.5 mm larger than the pressure-sensing connecting tube 3, and the outer diameter of the drainage tail tube 2 is 0-2 mm larger than the drainage head tube 1. This is just one specific implementation of a circular tube drainage structure, mainly suitable for situations where the drainage cavity is large and the drainage head tube 1 has a large range of motion within the drainage cavity, such as intrathoracic and intra-abdominal drainage. If necessary, several drainage holes can be cut into the side wall of the drainage head tube 1 according to clinical needs.

[0056] Furthermore, such as Figure 2As shown, the drainage head tube 1, drainage tail tube 2, and pressure-sensing connecting tube 3 are all flat tubes. The inner lumens of the drainage head tube 1 and the pressure-sensing connecting tube 3 are equal, and 0-2 mm smaller than the inner lumen of the drainage tail tube 2. The outer diameter of the drainage head tube 1 is 0.5-1.5 mm larger than the pressure-sensing connecting tube 3, and the outer diameter of the drainage tail tube 2 is 0-2 mm larger than the drainage head tube 1. This is another specific implementation of the flat tube drainage structure, mainly suitable for situations where the drainage cavity is relatively narrow and the drainage head tube 1 has limited mobility within the drainage cavity, such as drainage after thyroid and breast surgery. In specific implementation, several drainage holes can be cut and set on the flat side of the drainage head tube 1 according to clinical needs.

[0057] Furthermore, such as Figure 3 As shown, the drainage head tube 1 is configured as a drainage groove strip 4, which includes a drainage support strip 41 and three drainage support wings 42 disposed on the side of the drainage support strip 41 (the drainage support wings 42 can be set to 3-5, but considering the maximization of the cross-sectional area of ​​the drainage cavity formed by the drainage grooves 43, 3 is optimal). The long axis of the three drainage support wings 42 is in the same direction as the drainage support strip 41, and the indentations between adjacent drainage support wings 42 form three drainage grooves 43. Under the closing action of the outer wall of the human soft tissue surrounding the drainage cavity, the multiple drainage grooves 43 and the surrounding tissue form a similar closed drainage path, allowing the fluid in the drainage cavity to flow through the drainage grooves 43.

[0058] The advantages of the drainage groove strip 4 are:

[0059] 1. Multiple drainage grooves 43 surround the drainage groove strip 4 to form a drainage fluid inlet. The drainage inlets are evenly distributed and have a large opening area. It is difficult for surrounding tissues to block all drainage grooves 43, which can ensure smooth drainage.

[0060] 2. When the drainage tube is removed after the procedure, if surrounding tissue becomes stuck in the drainage groove 43, the drainage support wings 42 will open to the sides under force, thereby allowing the tissue stuck in the drainage groove 43 to be dislodged from the groove 43, avoiding damage to surrounding tissues and related serious complications caused by tube removal. This structure has unique advantages when applied to intra-abdominal drainage (both round and flat drainage tubes require several openings on the side wall to facilitate the entry of fluid from the drainage cavity into the tube; the greater omentum in the abdominal cavity has strong adhesive properties and can easily penetrate the side wall openings of the drainage tube, leading to damage when the drainage tube is removed, thus causing various risks).

[0061] The head section of the drainage tail tube 2 and the pressure-sensing connecting tube 3 are located inside the drainage cavity near the skin outlet, which weakens the closing effect of the soft tissue around the drainage cavity. To ensure the sealing of the pressure-sensing balloon 31 inside the drainage cavity, both the drainage tail tube 2 and the pressure-sensing connecting tube 3 are circular tubes. The inner cavity of the circular tube is connected to several drainage grooves 43. The drainage fluid enters the inner cavity of the circular tube of the pressure-sensing connecting tube 3 through the drainage grooves 43, and then enters the drainage device through the inner cavity of the circular tube of the drainage tail tube 2.

[0062] The sum of the cross-sectional areas of the drainage grooves 43 of the drainage groove strip 4 is not greater than the cross-sectional area of ​​the inner cavity of the pressure-sensing connecting tube 3. The outer shape of the inner cavity of the pressure-sensing connecting tube 3 is 0-2mm smaller than the inner cavity of the drainage tail tube 2, thereby ensuring that the inner cavity of the drainage fluid outflow passage will not become smaller or larger, and avoiding solid particles in the drainage fluid from getting stuck and blocking the drainage channel. The outer shape of the drainage groove strip 4 is 0.5-1.5mm larger than the pressure-sensing connecting tube 3, and the outer shape of the drainage tail tube 2 is 0-2mm larger than the drainage groove strip 4, thereby ensuring that the pressure-sensing connecting tube 3 and the drainage groove strip 4 can be smoothly pulled out when the drainage is finished and the tube is removed.

[0063] Furthermore, such as Figure 4 As shown, the drainage head tube 1 consists of two equally sized round tubes separated at their ends, used when the drainage cavity is large and requires drainage from two different locations. The two drainage head tubes 1 are placed at different drainage positions, resulting in better drainage of the drainage cavity. Simultaneously, only one skin perforation is needed, reducing the cumbersome operation of placing two drainage tubes simultaneously and minimizing trauma. Examples include: drainage after radical mastectomy, corresponding to the axillary and lower breast margins respectively; drainage after bilateral thyroid surgery, corresponding to both sides respectively; and abdominal drainage, corresponding to the iliac fossa and posterior abdominal cavity respectively. The drainage tail tube 2 and pressure-sensing connecting tube 3 are both flat tubes of the same shape, suitable for the shape of the two round drainage head tubes 1, facilitating removal of the drainage tubes at the end of drainage. The lumen of the two round drainage head tubes 1 runs parallel and connects to the pressure-sensing connecting tube 3, with equal inner lumens, 0-2 mm smaller than the inner lumen of the flat drainage tail tube 2. The drainage fluid from both drainage head tubes 1, located at different positions, is drained into the pressure-sensing connecting tube 3, and then drained out of the body cavity into the drainage container through the drainage tail tube 2. The inner lumen of the flat drainage tail tube 2 is slightly larger to avoid blockage of the drainage path during drainage. The parallel and tightly attached shape of the two round drainage head tubes 1 is 0.5-1.5 mm larger than the flat pressure-sensing connecting tube 3, creating a suitable protective space and gas volume for the pressure-sensing balloon 31. The shape of the flat drainage tail tube 2 is 0-2 mm larger than the parallel and tightly attached shape of the two round drainage head tubes 1, facilitating the removal of the flat pressure-sensing connecting tube 3 and the two round drainage head tubes 1 at the end of drainage.

[0064] Furthermore, such as Figure 5 As shown, the drainage head tube 1 consists of two identical flat tubes of the same shape, separated at the head sides, and functions as... Figure 4The two round drainage head tubes 1 are identical, while the drainage tail tube 2 and pressure-sensing connecting tube 3 are both flat tubes of the same shape, suitable for the combined shape of the two flat drainage head tubes 1. The flat surfaces of the tail ends of the two flat drainage head tubes 1 are arranged in close contact with the pressure-sensing connecting tube 3, reducing the cross-sectional area of ​​the two flat drainage head tubes 1 when combined, and reducing the incision length when the drainage tubes pass through the skin. The lumen of the tail ends of the two flat drainage head tubes 1 is equal to the inner lumen of the pressure-sensing connecting tube 3, and 0-2mm smaller than the inner lumen of the flat drainage tail tube 2, also to avoid drainage blockage. The combined shape of the flat surfaces of the two flat drainage head tubes 1 is 0.5-1.5mm larger than the flat pressure-sensing connecting tube 3, providing protective space and gas volume for the pressure-sensing balloon 31. The flat tube drainage tail tube 2 is larger than the two flat tube drainage head tubes 1 by 0-2mm in shape, which are arranged in a flat and close manner. This makes it easy to pull out the pressure-sensing connecting tube 3 and the two flat tubes of the same shape and size when the drainage ends.

[0065] Furthermore, such as Figure 6 As shown, the drainage head tube 1 consists of two identical, equally sized drainage groove strips 4 separated on both sides, which function as... Figure 4 The two round drainage head tubes 1 are identical, while the drainage tail tube 2 and the pressure sensing connection tube 3 are both flat tubes of the same shape, which are suitable for the shape of the two drainage groove strips 4 of the same shape and size.

[0066] Two drainage groove strips 4 are arranged end-to-end, with all drainage grooves 43 connected to the pressure-sensing connecting tube 3. The sum of the cross-sectional areas of the drainage grooves 43 of the two drainage groove strips 4 is not greater than the cross-sectional area of ​​the inner cavity of the pressure-sensing connecting tube 3, also to avoid drainage blockage. The outer shape of the inner cavity of the pressure-sensing connecting tube 3 is 0-2 mm smaller than the inner cavity of the drainage tail tube 2, providing protective space and gas volume for the pressure-sensing balloon 31. The outer shape of the two drainage groove strips 4 arranged end-to-end is 0.5-1.5 mm larger than the pressure-sensing connecting tube 3, and the outer shape of the drainage tail tube 2 is 0-2 mm larger than the outer shape of the two drainage groove strips 4 arranged end-to-end, facilitating the removal of the pressure-sensing connecting tube 3 and the drainage head tube 1 of the two drainage groove strips 4 of the same shape and size when drainage is completed.

[0067] Furthermore, such as Figure 7 As shown, the pressure sensor 33 includes a pressure-sensing housing 35 and an elastic corrugated wall cylinder 34; the inner wall of the distal end of the pressure-sensing housing 35 is annularly sealed to the opening of the elastic corrugated wall cylinder 34, and the pressure-sensing sealing cavity 36 formed by the inner wall of the pressure-sensing housing 35 and the outer wall of the elastic corrugated wall cylinder 34 is connected to the pressure-sensing tube 32, and an elastic valve injection port 37 is provided in the pressure-sensing sealing cavity 36.

[0068] The pressure-sensing outer shell 35 is a rigid cylindrical shell with an open tail end; the elastic corrugated wall cylinder 34 has a small wall thickness and is made of a soft and elastic material; the pressure-sensing outer shell 35 and the elastic corrugated wall cylinder 34 constitute a simple and sensitive pressure sensor 33 structure. When the drainage path is blocked, the pressure inside the drainage cavity increases, compressing the outer wall of the pressure-sensing balloon 31, squeezing the gas inside the pressure-sensing balloon 31 into the pressure-sensing sealing cavity 36. The increase in gas in the pressure-sensing sealing cavity 36 compresses and deforms the elastic corrugated wall cylinder 34, causing a change in the length of the elastic corrugated wall cylinder 34. By observing the displacement of the bottom of the elastic corrugated wall cylinder 34 within the pressure-sensing outer shell 35, the change in pressure inside the pressure-sensing balloon 31 can be observed. To ensure that the compressed length of the elastic corrugated cylinder 34 can be clearly observed, the pressure-sensing outer shell 35 and the corresponding elastic corrugated cylinder 34 should be slender, and the shape of the elastic corrugated cylinder 34 should be appropriately smaller than that of the pressure-sensing outer shell 35. This ensures that there is an appropriate gap between the outer wall of the elastic corrugated cylinder 34 and the inner wall of the pressure-sensing outer shell 35, so as to avoid the elastic corrugated cylinder 34 being hindered during compression deformation due to friction between the outer wall of the elastic corrugated cylinder 34 and the inner wall of the pressure-sensing outer shell 35.

[0069] Based on actual conditions, the drainage cavity is often connected to negative pressure during drainage. When the drainage tube is blocked, the negative pressure decreases or even becomes positive pressure, which is when various risks occur. Simultaneously, to reduce the gas volume inside the pressure sensor 33 and ensure its sensitivity to pressure changes within the pressure-sensing balloon 31, such as... Figure 7 As shown, the bottom of the elastic corrugated wall cylinder 34 should be close to the pressure-sensing tube 32, and be annularly sealed and bonded to the outer wall of the pressure-sensing outer shell 35 near the pressure-sensing tube 32. Of course, the pressure-sensing outer shell 35 should have scale markings printed on the outside corresponding to the pressure change value when the elastic corrugated wall cylinder 34 is compressed, facilitating objective observation of the pressure changes inside the pressure-sensing balloon 31 by medical personnel. An elastic valve injection port 37 is provided connecting to the pressure-sensing sealed cavity 36, facilitating the injection of an appropriate amount of gas into the pressure-sensing balloon 31 after the drainage tube is securely fixed in position.

[0070] Alternatively, the pressure sensor 33 includes an electronic pressure sensor, a power supply, a display screen, and an alarm; a spring valve injection port 37 is provided on the pressure sensing tube 32 and connected to the electronic pressure sensor. This is consistent with the above. Figure 7 The function is the same, only replaced with electronic components, which will not be described in detail.

[0071] Furthermore, the pressure sensor 33 is configured as an electronic pressure sensor, and a data storage device is electrically connected to the electronic pressure sensor. Through the data storage device, the pressure values ​​inside all pressure-sensing balloons 31 during the drainage process can be retrieved and read when necessary, so that medical personnel can make a more systematic judgment on possible drainage situations by observing the pressure change trend.

[0072] Furthermore, such as Figure 8As shown, the pressure sensor 33 is configured as an electronic pressure sensor, and a data transmitter is electrically connected to several pressure sensors 33. A data storage and monitoring center is signal-connected to several data transmitters, and an alarm is installed in the data storage and monitoring center. Through the data storage and monitoring center, a single medical staff member can centrally monitor the pressure changes of several pressure sensors 33, reducing the workload of medical staff needing to observe the pressure changes of each patient's pressure sensor 33 at their bedside. It can accurately and quickly collect the drainage pressure changes of each patient. When special conditions occur, corresponding treatment can be given to patients with drainage problems immediately (unblocking the drainage tube or taking emergency measures to relieve the drainage hazard).

[0073] Furthermore, Figure 9 As shown, the drainage support strip 41 has a drainage sampling cavity 44 extending through its long axis. One side of the drainage sampling cavity 44 opens at the free end of the drainage support strip 41, and the other side extends from the tail end of the drainage support strip 41, connecting to a sampling tube 45. The sampling tube 45 extends through the side wall of the drainage tail tube 2, and a sampling port 46 is provided at its free end. The sampling port 46 includes a spring valve. When the patient experiences infection or other special circumstances requiring sampling of the drainage fluid through the drainage sampling cavity 44, the free end of the drainage support strip 41 is located deep within the drainage cavity. This avoids contamination of the sample by the pressure-sensing connecting tube 3 located shallowly within the drainage cavity and the liquid inside the drainage tail tube 2 located outside the drainage cavity, ensuring the purity of the sample. After sampling, the sample is sent for testing or bacterial culture to screen for sensitive antibiotics, accurately assess the drainage status, and make accurate medical interventions to enable the patient to recover quickly. At the same time, when interventional treatment is required after a clear assessment of the condition, a saline suspension bag (or containing drugs) can be connected through sampling port 46 to slowly and continuously infuse the drainage cavity with saline to flush and drain the drainage cavity, which is conducive to controlling infection (such as enterocutaneous fistula and esophageal fistula) and promoting the healing of drainage wounds in special conditions (such as bile leakage).

[0074] Figure 9 The middle part is a schematic diagram of a single drainage groove strip 4. If adopted Figure 6 The structure of the two drainage groove strips 4 shown requires drainage sampling chambers 44 to be set in the drainage support strips 41 of the two drainage groove strips 4 respectively, and two independent sampling tubes 45 to be set at the tail openings of the drainage sampling chambers 44. The two sampling tubes 45 pass through the side wall of the drainage tail tube 2 and sampling ports 46 are set at the free ends respectively. The sampling ports 46 include spring valve ports, which can be used to sample and flush the drainage parts of the two drainage groove strips 4 separately.

[0075] Similarly, such as Figure 10As shown, a drainage sampling chamber 44 is provided through the side wall of the drainage head tube 1 of the round or flat tube along its long axis. One side of the drainage sampling chamber 44 opens at the free end of the drainage head tube 1, and the other side exits the tail of the drainage head tube 1, connecting to a sampling tube 45. The sampling tube 45 extends through the side wall of the drainage tail tube 2, and a sampling port 46 is provided at the free end. The sampling port 46 includes a spring valve port. Its structure, function, and beneficial effects are described below. Figure 9 The same applies, so I will not repeat it here.

[0076] In summary, this invention provides a slightly thinner pressure-sensing connecting tube 3 at the junction of the drainage head tube 1 and the drainage tail tube 2. An annular depression is formed on the outer wall of the pressure-sensing connecting tube 3 between the drainage head tube 1 and the drainage tail tube 2, creating a protective space and gas volume space for the pressure-sensing balloon 31 located on the outer wall of the pressure-sensing connecting tube 3. This avoids or reduces the pressure of the soft tissue on the outer wall of the drainage cavity on the pressure-sensing balloon 31. An appropriate amount of gas is filled into the pressure-sensing balloon 31, keeping its wall in a near-tension-free state. Pressure changes within the drainage cavity directly affect the wall of the pressure-sensing balloon 31, causing the gas pressure inside the balloon to change synchronously with the drainage cavity. This allows for dynamic observation of pressure changes within the drainage cavity through a pressure sensor 33 connected to the pressure-sensing balloon 31 outside the drainage cavity, enabling timely detection of drainage blockages and prompt handling of drainage emergencies.

[0077] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. A pressure-measuring drainage tube, characterized in that: It includes a drainage head tube (1) placed in the drainage cavity, a drainage tail tube (2) placed at the edge of the drainage cavity and extending out of the drainage cavity, and a pressure-sensing connecting tube (3) set between the drainage head tube (1) and the drainage tail tube (2); the cross-section of the inner cavity of the pressure-sensing connecting tube (3) and the drainage head tube (1) are the same shape, and both are 0-2mm smaller than the drainage tail tube (2); the cross-section of the outer wall of the pressure-sensing connecting tube (3) is smaller than the cross-section of the outer wall of the drainage head tube (1), and the cross-section of the outer wall of the drainage head tube (1) is not larger than the cross-section of the outer wall of the drainage tail tube (2); A pressure-sensing balloon (31) is annularly wrapped around the outer wall of the pressure-sensing connecting tube (3), and a pressure-sensing tube (32) is connected to the pressure-sensing balloon (31). A pressure sensor (33) is installed at the end opening of the side wall of the drainage tail tube (2) of the pressure-sensing tube (32).

2. The pressure-measuring drainage tube according to claim 1, characterized in that: The drainage head tube (1), drainage tail tube (2) and pressure-sensing connection tube (3) are all round tubes or flat tubes.

3. The pressure-measuring drainage tube according to claim 1, characterized in that: The drainage head tube (1) is configured as a drainage groove strip (4), which includes a drainage support strip (41) and three drainage support wings (42) disposed on the side of the drainage support strip (41). The long axis of the three drainage support wings (42) is in the same direction as the drainage support strip (41), and the recesses between adjacent drainage support wings (42) form three drainage grooves (43). The drainage tail tube (2) and the pressure-sensing connecting tube (3) are both round tubes.

4. The pressure-measuring drainage tube according to claim 2, characterized in that: The drainage head tube (1) consists of two equally thick round tubes separated at the head and side. The drainage tail tube (2) and the pressure sensing connection tube (3) are both flat tubes of the same shape. The tail lumens of the two round tube drainage head tubes (1) are parallel and connected to the pressure sensing connection tube (3). Alternatively; the drainage head tube (1) is two flat tubes of the same shape and size separated at the head side, the drainage tail tube (2) and the pressure sensing connection tube (3) are both flat tubes of the same shape, and the flat surfaces of the drainage head tube (1) of the two flat tubes are arranged in close contact with the pressure sensing connection tube (3).

5. The pressure-measuring drainage tube according to claim 3, characterized in that: The drainage head tube (1) consists of two identical drainage groove strips (4) separated on the head side, and the drainage tail tube (2) and the pressure sensing connection tube (3) are both identical flat tubes; The two drainage groove strips (4) are arranged with their tail ends touching each other, and all their drainage grooves (43) are connected to the pressure-sensing connecting pipe (3). The sum of the cross-sectional areas of the drainage grooves (43) of the two drainage groove strips (4) is not greater than the cross-sectional area of ​​the inner cavity of the pressure-sensing connecting pipe (3).

6. The pressure-measuring drainage tube according to claim 1, characterized in that: The pressure sensor (33) includes a pressure-sensing shell (35) and an elastic corrugated wall cylinder (34). The inner wall of the distal end of the pressure-sensing shell (35) is connected to the opening of the elastic corrugated wall cylinder (34) in an annular seal. The pressure-sensing sealing cavity (36) formed by the inner wall of the pressure-sensing shell (35) and the outer wall of the elastic corrugated wall cylinder (34) is connected to the pressure-sensing tube (32). An elastic valve injection port (37) is provided in the pressure-sensing sealing cavity (36). Alternatively, the pressure sensor (33) may include an electronic pressure sensor, a power supply, a display screen, and an alarm; the pressure sensing tube (32) may be provided with an elastic valve injection port (37) connected to the electronic pressure sensor.

7. The pressure-measuring drainage tube according to claim 6, characterized in that: The pressure sensor (33) is configured as an electronic pressure sensor, and a data storage device is electrically connected to the electronic pressure sensor. Alternatively, the pressure sensor (33) may be configured as an electronic pressure sensor, and a data transmitter may be configured in electrical connection with several pressure sensors (33); a data storage and monitoring center may be configured in signal connection with several data transmitters, and an alarm may be configured in the data storage and monitoring center.

8. The pressure-measuring drainage tube according to claim 3 or 5, characterized in that: The drainage support strip (41) is provided with a drainage sampling cavity (44) through its long axis. One side of the drainage sampling cavity (44) is open at the free end of the drainage support strip (41), and the other side is connected to the tail of the drainage support strip (41) and a sampling tube (45) is provided. The sampling tube (45) passes through the side wall of the drainage tail tube (2) and a sampling port (46) is provided at the free end. The sampling port (46) includes a spring valve port.

9. The pressure-measuring drainage tube according to claim 2 or 4, characterized in that: A drainage sampling chamber (44) is provided through the side wall of the drainage head tube (1) of the round or flat tube along the long axis. One side of the drainage sampling chamber (44) opens into the free end of the drainage head tube (1) of the round or flat tube, and the other side exits the tail of the drainage head tube (1) of the round or flat tube and is connected to a sampling tube (45). The sampling tube (45) passes through the side wall of the drainage tail tube (2) and is provided with a sampling port (46) at the free end. The sampling port (46) includes a spring valve port.

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