A drainage tube for wound drainage

Abstract

This invention relates to a drainage tube for wound drainage, comprising: a drainage cavity, a first auxiliary drainage section, and a second auxiliary drainage section. When draining fluid from a patient's wound, the inner surface of the drainage cavity is configured with a threaded structure along the axial direction of the drainage section, allowing the fluid to pass smoothly. The first auxiliary drainage section is configured as one or more U-shaped cavities distributed along the axial direction of the drainage section at any position between the drainage cavity and the outer wall of the drainage section. The U-shaped cavities facilitate the rapid passage of fluid from the patient's wound, ensuring that the U-shaped cavities at least have an absorptive effect during the drainage process. The second auxiliary drainage section is configured as one or more auxiliary holes on the outer wall of the drainage section, with the center point line pointing in the same direction as the axial direction of the drainage section, thereby increasing the drainage area when draining fluid from the patient's wound.

Description

Technical Field

[0001] This invention relates to the field of general surgery, and preferably to a drainage device, and more particularly to a drainage tube for wound drainage. Background Technology

[0002] With the continuous development of modern medicine, various medical surgeries have emerged to address the diverse illnesses of different patients, including common fracture surgeries, thyroid surgeries, neurosurgical surgeries, abdominal surgeries, and so on. Surgery refers to the treatment performed by doctors using medical instruments on a patient's body, such as removal and suturing. It involves operations performed on a localized area of ​​the body using instruments like scalpels, scissors, and needles to maintain the patient's health. It is a major treatment method in surgery, commonly known as "opening the wound." Its purpose is to treat or diagnose diseases, such as removing diseased tissue, repairing damage, transplanting organs, and improving the body's function and morphology. Early surgery was limited to simple manual methods, involving cutting, slicing, and suturing on the body surface, such as abscess drainage, tumor removal, and wound suturing. Therefore, surgery is an operation that disrupts the integrity of tissue (cutting) or restores the integrity of damaged tissue (suturing). With the development of surgery, the scope of surgery has expanded, and it can now be performed on any part of the body. Regardless of the type of surgery, "opening the wound" is unavoidable, and therefore, wounds are inevitable. Wounds are divided into superficial wounds and deep wounds. Superficial wounds generally refer to wounds that damage the skin and subcutaneous layer. Deep wounds are wounds that extend to or below the muscle layer, creating an anaerobic environment conducive to the growth of anaerobic bacteria. Therefore, wound management is crucial clinically, especially for deep wounds. Thorough cleaning of the wound is essential, requiring repeated rinsing with saline, hydrogen peroxide, and iodine solution. Necrotic tissue and foreign objects must be removed. If necessary, drainage devices can be placed at the wound site to transform the anaerobic environment into an aerobic one, hindering anaerobic bacterial growth. After thorough cleaning, the wound is not bandaged; drainage devices further reduce the anaerobic environment, inhibiting anaerobic bacterial growth and promoting wound healing. Wound drainage can be categorized into passive and active drainage. Passive drainage relies on the pressure difference between the body fluids and the atmosphere to expel fluids, while active drainage uses negative pressure to drain fluids and prevents retrograde infection, making it more commonly used for clean or mildly infected deep wounds. Wound drainage can remove pus and necrotic tissue from abscesses or other purulent lesions, and can also prevent the accumulation of blood, exudate and digestive fluids in body cavities or during surgery, so as to avoid secondary compression and infection.

[0003] For example, thyroid surgery is a common clinical treatment for thyroid-related diseases. However, due to the special location of the thyroid gland, timely drainage and care of the surgical wound are necessary after surgery to prevent postoperative hemorrhage and fluid accumulation, effectively avoid tracheal compression, and reduce serious adverse consequences such as postoperative respiratory distress. Therefore, timely and effective wound drainage after thyroid surgery is of great significance. However, the conventional drainage methods used in clinical practice for thyroid surgery include timed syringe aspiration, skin graft drainage, or disposable drainage bags, but the drainage effect is not ideal. This is mainly because the effective area of ​​traditional drainage tubes at the site of wound fluid accumulation is too small. When draining wound fluid through the drainage tube, much of the fluid near the wound cannot be drained, resulting in low efficiency of the entire drainage process. Furthermore, the presence of foreign objects in the wound fluid may cause blockage of the drainage tube during the drainage process, which not only increases the workload but also easily causes discomfort to the patient. Furthermore, when using existing drainage tubes for active drainage, the limited effective area of ​​these tubes at the site of wound fluid accumulation presents several challenges. Firstly, the negative pressure exerted on the wound at the tube opening can be overwhelming, potentially causing tearing and secondary damage during the negative pressure process, hindering healing. Secondly, when using external negative pressure devices to create negative pressure at the wound site, the presence of foreign objects can lead to tube blockage. This necessitates tube removal for cleaning or replacement, increasing the risk of retrograde infection, exacerbating wound damage, and even endangering the patient's life. Additionally, the limited effective area of ​​existing drainage tubes at the site of wound fluid accumulation necessitates multiple movements of the tube, especially in cases of large wounds or when fluid has spread to surrounding areas, causing discomfort to the patient. Furthermore, when draining wound fluid using traditional tubular drainage tubes, the varying viscosity of different wound fluids easily leads to fluid adhering to the tube wall during drainage. Traditional round tube drainage tubes are also inefficient at draining viscous liquids or intestinal contents containing debris, easily causing medical complications due to insufficient or obstructed drainage. Given these problems, seeking more effective drainage methods to overcome the shortcomings of conventional drainage is of great importance. Therefore, this application provides a drainage tube for wound drainage. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention provides a drainage tube for wound drainage, comprising: a tubular drainage portion configured to have an axially penetrating drainage cavity, and a second auxiliary drainage portion.

[0005] Preferably, the second auxiliary drainage section is configured as one or more auxiliary holes on the outer wall of the drainage section with the center point line pointing in the same direction as the axial direction of the drainage section, so as to increase the drainage area when draining the patient's wound fluid. The inner surface of the drainage cavity of the drainage section is configured as a threaded structure along the axial direction of the drainage section, so that the patient's wound fluid can pass through smoothly.

[0006] Preferably, the drainage section is further provided with a first auxiliary drainage section, which is configured as one or more U-shaped cavities distributed along the axial direction of the drainage section at any position between the drainage cavity and the outer wall of the drainage section. The arrangement of the U-shaped cavity is conducive to the rapid passage of the patient's wound fluid, so that the cavity at least produces a suction effect during the drainage of the patient's wound fluid.

[0007] Preferably, the one or more U-shaped cavities have an angle with the adjacent U-shaped cavities in the circumferential direction along the drainage portion.

[0008] Preferably, one or more auxiliary holes of the second auxiliary drainage section have a hole depth in the radial direction of the drainage section that is at least greater than the radial distance between the outer wall of the drainage section and the U-shaped cavity, so that the second auxiliary drainage section can increase the effective drainage area of ​​the drainage tube during the drainage of fluid from the patient's wound.

[0009] Preferably, the furthest distance between one or more auxiliary holes of the second auxiliary drainage part and the end of the drainage part acting on the patient's wound is less than the minimum distance between the end of the drainage part and the end of the drainage part away from the patient's wound.

[0010] Preferably, the axis of the drainage cavity, which is axially disposed in the tubular drainage portion, coincides with the axis of the drainage portion.

[0011] Preferably, the radial distance between the center point of the drainage cavity, which is axially disposed in the tubular drainage section, and the inner wall of the drainage cavity is at least greater than the radial distance between the inner wall of the drainage cavity and the outer wall of the drainage section.

[0012] Preferably, the radial cross-sectional area of ​​the drainage cavity, which is axially disposed in the tubular drainage section, is greater than the radial cross-sectional area of ​​the U-shaped cavity, so that the drainage cavity can ensure the smooth passage of wound fluid when draining wound fluid from the patient's wound.

[0013] Preferably, the threaded structure of the drainage cavity has a height difference along the radial direction of the drainage portion.

[0014] Preferably, the end of the tubular drainage portion near the patient's wound is constructed as a blunt cylindrical structure so that the end of the tubular drainage portion near the patient's wound makes flexible contact with the patient's wound.

[0015] The beneficial technical effects of the present invention include: the drainage tube for wound drainage of this application is equipped with a drainage cavity with a threaded structure. When the patient's wound is drained through the drainage tube of this application, the presence of the threaded structure allows the accumulated fluid in the patient's wound to be guided by the threaded structure, thereby allowing it to pass smoothly through the drainage tube. Especially under negative pressure conditions, the drainage cavity with the threaded structure in the drainage tube of this application has a more obvious effect, achieving the beneficial effect of making the drainage process smoother and improving drainage efficiency.

[0016] The drainage tube used in this application for wound drainage is provided with one or more auxiliary holes at the end near the patient's wound. When the drainage tube of this application is used to drain the patient's wound, the one or more auxiliary holes can effectively increase the drainage area at the end face of the drainage tube near the patient's wound. By setting one or more auxiliary holes, the discomfort caused to the patient due to the movement of the drainage tube can be significantly reduced, thereby increasing the drainage area and improving the drainage efficiency.

[0017] The drainage tube used for wound drainage in this application has one or more U-shaped cavities distributed along the axial direction of the drainage part at any position between the drainage cavity and the outer wall of the drainage part. When the drainage tube of this application is used to drain the patient's wound, the one or more U-shaped cavities can play an auxiliary role in drainage, and the one or more U-shaped cavities can also play a good role in ventilation during the drainage process without contacting the patient's wound fluid. Attached Figure Description

[0018] Figure 1 This is a structural diagram of a drainage tube for wound drainage according to the present invention;

[0019] Figure 2 This is an axial cross-sectional view of the drainage tube according to the first embodiment of the present invention;

[0020] Figure 3 This is an axial cross-sectional view of the drainage tube according to the second embodiment of the present invention;

[0021] Figure 4 This is an axial cross-sectional view of the drainage tube according to the third embodiment of the present invention;

[0022] Figure 5 This is an axial front view of a drainage tube for wound drainage according to the present invention.

[0023] List of reference numerals

[0024] 100: Drainage section; 101: Drainage cavity; 200: First auxiliary drainage section; 201: U-shaped cavity; 300: Second auxiliary drainage section; 301: Auxiliary hole. Detailed Implementation

[0025] Any orientation specified in this application is provided for the convenience of the reader only and does not constitute a limitation on this application. In the description of this invention, it should be understood that the terms "center," "radial," "axial," "circumferential," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0026] These and other features and advantages of the invention will be more fully understood through the following description of one or more embodiments of the invention in conjunction with the accompanying drawings.

[0027] In view of the prior art, this application proposes a drainage tube for wound drainage, including: a tubular drainage part 100, a drainage cavity 101 axially disposed on the drainage part 100, a first auxiliary drainage part 200 and a second auxiliary drainage part 300.

[0028] According to a preferred embodiment, the drainage tube for wound drainage of this application is constructed as a hollow tubular structure. When the drainage tube of this application is used to drain fluid from the patient's wound, the hollow tubular structure can establish a drainage relationship with the fluid from the patient's wound, so that the fluid from the patient's wound can enter the drainage bag through the hollow tubular drainage tube of this application.

[0029] According to a preferred embodiment, the end of the drainage tube for wound drainage of this application is constructed as a blunt cylindrical shape on the side near the patient's wound. When the drainage tube of this application is inserted into the patient's wound, the blunt cylindrical end of the drainage tube is inserted into the patient's wound. Due to the presence of the blunt cylindrical end of the drainage tube, the blunt cylindrical end can reduce the friction between the end of the drainage tube and the wound when the drainage tube is inserted into the patient's wound. Furthermore, when the drainage tube is moved within the patient's wound, the blunt cylindrical end can maintain flexible contact with the wound, thereby reducing discomfort and pain caused to the patient during the use of the drainage tube of this application.

[0030] According to a preferred embodiment, the drainage tube for wound drainage in this application is provided with a drainage cavity 101. The drainage cavity 101 is arranged axially through the drainage tube. At the same time, the central axis of the drainage cavity 101 along the axial direction of the drainage tube coincides with the central axis of the drainage tube along the axial direction, and the inner diameter of the drainage cavity 101 along the radial direction of the drainage tube is equal everywhere. That is, the radial thickness of the drainage tube with the axially through drainage cavity 101 is equal everywhere. This makes the drainage tube with uniform thickness less prone to kinking and deformation under pressure when it is inserted into the patient's wound and moves within the wound, so as to avoid accidental bending and deformation of the drainage tube caused by uneven thickness.

[0031] According to a preferred embodiment, the radial distance between the center point of the drainage cavity 101 and the inner wall of the drainage cavity 101 of the drainage tube used for wound drainage in this application is at least greater than half the radial distance between the center point of the drainage portion 100 and the outer wall of the drainage portion 100. Preferably, the radial inner diameter of the drainage tube in this application is 5 mm, and the radial inner diameter of the drainage cavity 101 is 3 mm. By setting the radial inner diameter of the drainage cavity 101 to be greater than half the radial inner diameter of the drainage portion 100, it is possible to ensure the smooth passage of wound fluid when draining a patient's wound through the drainage tube of this application, preventing drainage difficulties caused by a drainage cavity 101 with an inner diameter that is too small, and also preventing the drainage cavity 101 with an inner diameter that is too small from being easily blocked by foreign objects. On the other hand, it can ensure that the drainage tube does not undergo unnecessary excessive bending during the process of entering the patient's wound and moving within the wound, avoiding drainage obstruction.

[0032] According to a preferred embodiment, the cross-sectional area of ​​the drainage cavity 101 of the drainage tube used for wound drainage in this application along the radial direction of the drainage portion 100 is greater than the cross-sectional area of ​​the U-shaped cavity 201 disposed between the drainage cavity 101 and the outer wall of the drainage portion 100, so that when draining the patient's wound fluid, the drainage cavity 101 can play the main drainage role, while the U-shaped cavity 201 can at least play the auxiliary drainage role, so as to ensure the smooth passage of the patient's wound fluid.

[0033] According to a preferred embodiment, the drainage cavity 101 of the drainage tube used for wound drainage in this application has a threaded structure on its inner wall. When draining the patient's wound fluid, the threaded structure of the inner wall of the drainage cavity 101 can drain the wound fluid that enters the drainage tube through the end of the drainage tube near the patient's wound and through the auxiliary hole 301 disposed on the outer wall of the drainage tube. Due to the threaded structure of the inner wall of the drainage cavity 101, when the patient's fluid enters the drainage tube through the end of the drainage tube and the auxiliary hole 301 on the outer wall of the drainage tube, it can be guided by the angle of the drainage tube and the gravity of the liquid itself, as well as the clockwise or counterclockwise guiding effect of the thread along the circumference of the drainage tube. Especially when an external negative pressure device is connected, the drainage effect of the threaded structure is more obvious. Preferably, the distance between the thread crest and the thread root of the drainage cavity 101 in the radial direction along the drainage portion 100 is 1.5 mm, and the thread pitch is 3 mm. It should be noted that the distance between the thread crest and the thread root and the thread pitch can be changed according to the characteristics of different wounds and the desired drainage efficiency. The thread structure in the drainage cavity 101 of this application is similar to the reverse application of the Archimedes spiral in the pumping mechanism.

[0034] According to a preferred embodiment, the drainage tube for wound drainage of this application is equipped with a first auxiliary drainage section 200. The first auxiliary drainage section 200 is configured as three U-shaped cavities 201 distributed along the axial direction of the drainage section 100 at any position between the drainage cavity 101 and the outer wall of the drainage section 100. The line connecting the center points of the three U-shaped cavities 201 is constructed as an equilateral triangle in the cross-section along the axial direction of the drainage tube. The side of the three U-shaped cavities 201 closest to the patient's wound is constructed as a curved surface at a certain angle to the axial direction of the drainage tube, so that the U-shaped cavity 201 can coincide with the outer end face of the blunt cylindrical end of the drainage tube closest to the patient's wound. Therefore, when draining the patient's wound fluid through the drainage tube of this application, the U-shaped cavities 201 with curved surfaces can, on the one hand, increase the contact area with the patient's wound and improve the drainage effect; on the other hand, they can reduce the friction and unnecessary stinging sensation caused by the movement of the drainage tube at the patient's wound. When draining fluid from a patient's wound through the drainage tube of this application, the three U-shaped cavities 201 at any position between the drainage cavity 101 and the outer wall of the drainage section 100 can at least play a drainage role. When all three U-shaped cavities 201 are submerged in the fluid in the patient's wound, they play an auxiliary drainage role. When at least one U-shaped cavity 201 is not submerged in the fluid in the patient's wound, the U-shaped cavity 201 that is not submerged in the fluid in the patient's wound can also play a ventilation role.

[0035] According to a preferred embodiment, the drainage tube for wound drainage of this application is configured with a second auxiliary drainage section 300. One or more auxiliary holes 301 of the second auxiliary drainage section 300 have a hole depth in the radial direction of the drainage section 100 that is at least greater than the radial distance between the outer wall of the drainage section 100 and the U-shaped cavity 201, so that the second auxiliary drainage section 300 can generate a negative pressure in the radial direction of the auxiliary holes during the drainage of the patient's body fluids.

[0036] According to a preferred embodiment, the drainage tube for wound drainage of this application is configured with a second auxiliary drainage section 300. The second auxiliary drainage section 300 is configured with one or more auxiliary holes 301 on the outer wall of the drainage section, with the line connecting its center points parallel to the axial direction of the drainage section 100. The depth of the one or more auxiliary holes 301 in the radial direction of the drainage section 100 is at least greater than the radial distance between the outer wall of the drainage section 100 and the U-shaped cavity 201. The setting of the auxiliary holes 301 can increase the effective contact area between the drainage tube of this application and the patient's wound. In addition to having frontal suction, it also provides an additional suction surface in the area of ​​the outer wall of the drainage tube, thereby increasing the absorption rate of the drainage tube of this application. On the other hand, the drainage tube of this application can be connected to the environment through the auxiliary holes 301. The setting of the auxiliary holes 301 makes the drainage tube of this application breathable, avoiding the generation of anaerobic bacteria and further aggravating the wound. Specifically, one or more auxiliary holes 301 arranged on the outer wall of the drainage section with the center point line parallel to the axial direction of the drainage section 100 have three different embodiments to suit different scenarios and needs.

[0037] According to the first embodiment, which is suitable for draining wound fluid in general patients, the auxiliary holes 301, whose center point line is parallel to the axial direction of the drainage part 100, are configured as 15 circular holes with a spacing of 5 mm and a diameter of 2 mm. The center point line of the auxiliary holes 301 is located above the U-shaped cavity 201, and the radial depth along the drainage tube is 1 mm, so that the auxiliary holes 301 are connected to the U-shaped cavity 201 in the direction along the drainage tube. When draining fluid from a patient's wound using the drainage tube of the first embodiment, the drainage cavity 101 with a threaded structure disposed within the drainage tube serves as a drainage chamber. When the fluid from the patient's wound enters the drainage cavity 101 through the end of the drainage tube near the patient's wound, the U-shaped cavity 201, and the 15 auxiliary holes 301 whose center point is parallel to the axial direction of the drainage section 100, the threaded structure within the drainage cavity 101 can guide the drainage fluid through the tilt angle of its pitch, further accelerating the drainage rate and drainage effect. This effect is even more pronounced when an external negative pressure device is connected. The auxiliary hole 301, located above the U-shaped cavity 201 and communicating with the U-shaped cavity 201 in the radial direction inward along the drainage tube, can increase the effective drainage area of ​​the drainage tube at the patient's wound and increase the air permeability of the drainage tube at the patient's wound. At the same time, the length of the 15 auxiliary holes 301 with a spacing of 5 mm can meet the needs of both superficial and deep wounds, and the number of auxiliary holes 301 can be adjusted according to the length of the wound.

[0038] According to the second embodiment, which is suitable for cases where there is a large amount of foreign body and fluid accumulation in the patient's wound, the auxiliary holes 301, whose center point line is parallel to the axial direction of the drainage part 100, are configured as eight circular holes with a spacing of 5 mm and a diameter of 5 mm. The center point line of the auxiliary holes 301 is located on the outer wall of the drainage tube and does not coincide with the projection of the U-shaped cavity 201 along the radial outward direction of the drainage tube onto the outer wall of the drainage tube. The radial depth along the radial inward direction of the drainage tube is 2 mm, so that the auxiliary holes 301 are connected to the drainage cavity 101 in the radial inward direction of the drainage tube. When draining wound fluid using the drainage tube of the second embodiment, since there are many foreign objects in the wound fluid, if a small-diameter auxiliary hole 301 is used, the foreign objects in the wound fluid may block the auxiliary hole 301 during drainage. At the same time, if a drainage tube that connects the auxiliary hole 301 to the U-shaped cavity 201 is used, the diameter of the U-shaped cavity 201 is also small, and it is also possible that the U-shaped cavity 201 and the auxiliary hole 301 will be blocked at the same time, which is not conducive to the effective drainage of wound fluid. Therefore, when draining a large amount of foreign body and fluid from a patient's wound, a large-diameter auxiliary hole 301 is used. This hole is located on the outer wall of the drainage tube, not overlapping the U-shaped cavity 201, and is positioned radially outward from the drainage tube. The threaded drainage cavity 101, located within the drainage tube, serves as the drainage chamber. The U-shaped cavity 201, when fully submerged in the patient's wound fluid, serves as an auxiliary drainage chamber. When not fully submerged, the U-shaped cavity 201 provides both auxiliary drainage and ventilation. The large-diameter auxiliary hole 301 increases the effective drainage area of ​​the drainage tube and prevents blockage by foreign body.

[0039] According to the third embodiment, which is suitable for situations where the patient's wound requires a larger ventilation area, the auxiliary holes 301, whose center point line is parallel to the axial direction of the drainage section 100, are configured as 10 circular holes with a spacing of 5 mm and a diameter of 4 mm. The center point line of the auxiliary holes 301 is located above the U-shaped cavity 201, and the radial depth along the drainage tube is 5 mm, so that the auxiliary holes 301 are connected to both the U-shaped cavity 201 and the drainage cavity 101 in the radial direction along the drainage tube. When the patient's wound requires a larger ventilation area, the auxiliary holes 301, which penetrate the U-shaped cavity 201 and the drainage cavity 101 in the radial direction along the drainage tube, can enable both the U-shaped cavity and the drainage cavity 101 to play a ventilation role at the same time, thereby making the drainage tube more interactive with the external environment, and ultimately achieving the effect of increasing the ventilation area and enhancing the ventilation efficiency. When draining fluid from a patient's wound using the drainage tube of the third embodiment, the drainage cavity 101 with a threaded structure disposed within the drainage tube serves to drain the fluid, while the U-shaped cavity 201 and the auxiliary hole 301 serve to assist in drainage and increase the ventilation area.

[0040] Preferably, a preferred embodiment is also provided, including a temperature control unit, which is used to apply a controllable temperature heat source to the drainage portion and / or lead the heat source of the drainage portion to the outside, so that the temperature control unit can control the temperature of the drainage portion, thereby regulating the temperature of the patient's wound site by means of heat exchange generated by the contact between the drainage portion and the patient's wound site.

[0041] Preferably, the temperature control unit can achieve the above functions in the following ways:

[0042] The temperature control unit is unidirectionally connected to at least some or all of the auxiliary holes 301 in the second auxiliary drainage section 300 via a channel passing through it. This allows the temperature control unit to deliver a heating or cooling medium to the auxiliary holes 301, thereby adjusting the temperature within the auxiliary holes 301 and thus regulating the temperature of the patient's wound in contact with them. Unidirectional connection means that wound debris cannot enter the channel under suction, and consequently, cannot enter the temperature control unit. The temperature control unit is configured to adjust the patient's wound temperature by supplying a heat transfer medium or a cold transfer medium to the auxiliary port 301 based on a set first mode and a second mode. In the first mode, the temperature control unit controls the supply of the heat transfer medium or cold transfer medium to the auxiliary port 301 based on a set constant temperature value to maintain a constant temperature in contact with the patient's wound. In the second mode, the temperature control unit adjusts the supply of the heat transfer medium or cold transfer medium to the auxiliary port 301 based on dynamic high and low temperature level limits, thereby dynamically adjusting the temperature of the patient's wound. Preferably, a temperature sensing component is disposed at the patient's wound location, and the dynamic high and low temperature level limits followed by the temperature control unit change based on the wound temperature detection value obtained by the temperature sensing component. Preferably, the wound temperature detection value is the highest level limit value, and the normal average body temperature of the patient's body excluding the wound is the lowest level limit value. Preferably, in the first mode, when the wound temperature detected by the temperature sensing component is lower than the set constant temperature value, the temperature control unit supplies heat medium to the auxiliary port 301 to raise the wound temperature to the set constant temperature value; when the wound temperature detected by the temperature sensing component is higher than the set constant temperature value, the temperature control unit supplies coolant to the auxiliary port 301 to lower the wound temperature to the set constant temperature value. Preferably, in the second mode, in the initial time, the wound temperature detected by the temperature sensing component is set to an initial high and low temperature level limit value. In the first time, when the wound temperature detected by the temperature sensing component is within the initial high and low temperature level limit value and is lower than the wound temperature detected value in the initial time, the temperature control unit gradually supplies coolant to the auxiliary port 301 to gradually lower the temperature of the auxiliary port to the lowest temperature level limit value, and then gradually raises it to the wound temperature detected value, and then repeats the process. During the second time interval, when the wound temperature value obtained by the temperature sensing component is higher than the highest temperature level limit value updated at the previous moment, the temperature control unit gradually heats up the auxiliary hole 301 to the initial highest temperature level limit value by gradually supplying heat medium to the auxiliary hole 301, and maintains it for a set time before gradually reducing the temperature to the lowest temperature level limit value.

[0043] The aforementioned solution enables dynamic adjustment of the aspiration temperature or the amount of temperature applied to clean the wound based on the patient's wound temperature. According to the applicant's research, during the wound healing process, the blood supply level at the wound site is higher than that of other parts of the body, and the temperature is also relatively higher. As the wound heals, the temperature at the wound site gradually decreases to normal body surface temperature. If the temperature is not suitable during aspiration, it will cause slow wound healing and lead to excessive bacterial growth. Since human wound healing is closely related to individual constitution, each individual's wound temperature varies during healing. Therefore, this solution adjusts the aspiration temperature so that the device can automatically adjust the aspiration environment temperature according to the wound temperature, thereby providing the most suitable temperature environment for wound healing. This can significantly improve the wound healing effect, conform to the physiological process of wound healing, provide the best healing environment, reduce the probability of bacterial proliferation, and ensure wound hygiene and safety.

[0044] Preferably, a preferred embodiment is also provided, including a light irradiation unit embedded in the auxiliary hole 301 of the second auxiliary drainage section 300. The light irradiation unit provides light to the patient's wound surface, achieving sterilization, disinfection, and promoting wound healing. Preferably, the light emitted by the light irradiation unit is blue light with a wavelength of 465nm, red light with a wavelength of 635nm, and near-infrared light with a wavelength of 810nm. The blue light in the light irradiation unit acts as a sterilizer, and when the drainage device of this application aspirates fluid from the patient's wound during the wound inflammatory reaction stage, the blue light in the light irradiation unit has a sterilizing effect on the patient's wound surface. The red light and near-infrared light in the light irradiation unit promote wound healing. When the drainage device of this application aspirates fluid from the patient's wound during the wound cell proliferation stage, the red light and near-infrared light in the light irradiation unit enhance the respiration capacity of mitochondria, induce the production of intracellular reactive oxygen species, and significantly improve the healing speed of skin wounds.

[0045] Studies have shown that irradiating seven strains of Helicobacter pylori with blue light achieves a 99.9% sterilization rate. Blue light is also widely used in the treatment of acne and neonatal jaundice. Research has found that blue light can kill both Gram-positive and Gram-negative bacteria. This study observed the effect of blue light on bacterial seroconversion rates. The results showed that on day 4 of blue light intervention, 6 cases in the observation group achieved seroconversion (30.0%), while the control group had a seroconversion rate of 0%. Furthermore, the inhibitory effect of blue light on bacterial growth gradually increased with the duration of intervention. The seroconversion rate in the observation group significantly increased, reaching 95% on day 10, and the difference between the two groups was statistically significant (P < 0.05). This demonstrates that blue light can effectively kill bacteria in traumatic infections, and the sterilization is limited to the infected area without affecting other non-infected areas. The radiation intensity of blue light can be well adjusted and monitored, and it has good safety compared to antibiotics. Eleven patients with refractory wounds infected with MRAS (drug-resistant Staphylococcus aureus) were irradiated with blue light at a wavelength of 465 nm. All 11 wounds healed completely. This study used a randomized controlled trial to observe the effect of blue light on traumatic infected wounds. The results showed that the wound area reduction rate in the observation group was significantly higher than that in the control group at different time points after blue light intervention (main effect P < 0.01). Furthermore, the wound area reduction rate increased significantly with prolonged treatment time, which is related to the bactericidal and bacteriostatic effects of blue light.

[0046] Low-level laser therapy (LLLT) refers to the biological effects produced by irradiating biological tissues with low-energy laser light in the wavelength range of 600–1000 nm (red to near-infrared). Studies have shown that using an 810 nm low-level laser on mouse embryonic fibroblasts, LLLT not only enhances mitochondrial respiration but also activates downstream processes mediated by the nuclear factor κB signaling pathway by inducing the production of intracellular reactive oxygen species. Altering the cellular redox state, inducing intracellular signal activation, increasing the activation of redox-sensitive transcription factors, and affecting enzyme activity and cell cycle progression are the basic mechanisms by which LLLT promotes wound healing. Research indicates that red light (635 nm) and near-infrared light (810 nm) can significantly improve the healing speed of skin wounds. This is because the absorption of red and near-infrared light by Cox alters the mitochondrial redox state, inducing the activation of intracellular signaling pathways, thereby affecting the migration and proliferation of related cells and promoting wound healing. Studies have also found that nitric oxide produced by mitochondria can competitively bind to iron-sulfur compounds with oxygen. Iron-sulfur compounds, after binding with nitric oxide, attach to the iron-copper center of the respiratory chain Cox, thereby inhibiting mitochondrial ATP synthesis. Irradiation with red and near-infrared light can release nitric oxide from mitochondria and Cox, thus relieving the mitochondrial respiratory inhibition caused by excessive nitric oxide binding and restoring the normal binding of oxygen molecules to Cox. This allows cellular respiration to proceed normally. LLLT exerts photo-biostimulatory effects by acting on cellular mitochondria, stimulating the growth, proliferation, and differentiation of various cells, including fibroblasts, vascular endothelial cells, and keratinocytes, accelerating wound healing.

[0047] Preferably, the density of the light control unit is adjustable according to the patient's infected wound condition and wound healing progress, and the above functions are achieved in the following ways:

[0048] The light control unit is unidirectionally connected to at least some or all of the auxiliary holes 301 in the second auxiliary drainage section 300 through a channel passing through the second auxiliary drainage section 300. This allows the light control unit to apply light to the patient's skin surface synchronously with the movement of the drainage tube. This enables the light control unit to apply light of different wavelengths to the patient's wound surface, thereby achieving the effects of sterilization and promoting wound healing. Unidirectional connection means that wound debris cannot enter the channel and therefore cannot enter the light control unit under suction. The light control unit is configured to disinfect bacteria on the wound surface and promote wound healing by delivering different wavelengths of light to the patient's skin surface through the auxiliary hole 301, based on a set first mode and a second mode. In the first mode, the light control unit emits blue light with a wavelength of 465nm to the wound through the auxiliary hole 301, based on the condition of the patient's wound surface, so that bacteria in contact with the wound are disinfected. In the second mode, the light control unit emits dynamically adjustable blue light with a wavelength of 465nm, red light with a wavelength of 635nm, and near-infrared light with a wavelength of 810nm to the wound through the auxiliary hole 301, based on the condition of the patient's wound surface. The light control unit can dynamically adjust the blue light and red light according to the duration of different light rays acting on the patient's wound and the surface temperature. Preferably, a temperature sensing component and a timing component are arranged at the patient's wound location. The dynamic high temperature level limit value followed by the light control unit changes based on the wound temperature detection value obtained by the temperature sensing component, and the light change frequency followed by the light control unit is based on the time interval preset by the timing component. Preferably, the wound temperature detection value is used as the highest level limit value. Preferably, in the second mode, when the wound temperature detection value obtained by the temperature sensing component is higher than the set constant temperature value, the light control unit stops the light irradiation, allowing the wound temperature to drop to the set constant temperature value. Preferably, in the second mode, the wound temperature value obtained by the temperature sensing component in the initial time period is used to set an initial high temperature level limit value. Preferably, in the second mode, the light control unit can switch the light according to the preset time interval of the timing component. The preset time interval of the timing component can be specifically set with different switching frequencies according to the user's own situation. When the timing component ends the previous time interval, the irradiation light of the light control unit will change. Preferably, the logic priority of the temperature sensing component is higher than that of the timing component, so that when the wound is irradiated by the light control unit, if the wound temperature is higher than the preset highest level limit value, even if the timing component has not yet completed the current time interval, the light control unit can stop the current light irradiation, so that the wound temperature is kept within a safe range.

[0049] The above solution enables dynamic adjustment of the irradiation time and light change frequency of the light control unit based on the patient's wound temperature and preset time intervals. When light irradiates a wound to aid healing, some light energy is converted into heat energy and acts on the wound site, especially red light. Prolonged exposure to red light may cause excessively high temperatures in the local wound area, which is detrimental to wound healing. Therefore, a multi-wavelength light cyclic irradiation method is used during the healing process to achieve a more ideal wound healing effect. Thus, the solution, through timing components and preset temperature detection components, can create an optimal temperature healing environment for the wound, and can adjust the light change frequency according to the specific needs of different users, achieving controllable and safe beneficial effects throughout the process.

[0050] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents. This specification contains multiple inventive concepts; terms such as "preferredly," "according to a preferred embodiment," or "optionally" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept.

Claims

1. A drainage tube for wound drainage, comprising: It is constructed as a tubular drainage section with an axially penetrating drainage cavity, a first auxiliary drainage section, and a second auxiliary drainage section. Its features are, It also includes a temperature control unit, which is used to apply a controllable heat source to the tubular drainage section and / or to lead the heat source of the tubular drainage section to the outside. The temperature control unit is unidirectionally connected to some or all of the auxiliary holes in the second auxiliary drainage section through a channel passing through the second auxiliary drainage section to deliver a heat medium or a cold medium to the auxiliary holes, thereby adjusting the temperature of the patient's wound in contact with the auxiliary holes. The first auxiliary drainage section is configured as one or more U-shaped cavities distributed axially along the tubular drainage section at any position between the drainage cavity and the outer wall of the tubular drainage section. The end of the tubular drainage section near the patient's wound is constructed as a blunt cylindrical structure to allow for flexible contact between the end of the tubular drainage section near the patient's wound and the wound. The second auxiliary drainage section is configured as one or more auxiliary holes on the outer wall of the tubular drainage section, with the center point line pointing in the same direction as the axial direction of the tubular drainage section. The depth of these holes is greater than the radial distance between the outer wall of the tubular drainage section and the U-shaped cavity. The auxiliary holes communicate with both the U-shaped cavity and the drainage cavity in the radial direction of the drainage tube, thereby increasing the drainage area when draining fluid from the patient's wound. The inner surface of the drainage cavity of the tubular drainage section is configured with a threaded structure along the axial direction of the tubular drainage section. The threaded structure within the drainage cavity guides the drainage fluid through the tilt angle of its pitch. The threaded structure on the inner wall of the drainage cavity, when draining wound fluid, interacts with the wound fluid entering the drainage tube through the end closest to the patient's wound and through auxiliary holes located on the outer wall of the drainage tube. This allows the patient's fluid to be guided into the drainage tube through the end of the drainage tube and the auxiliary holes on the outer wall by the angle of the drainage tube, the weight of the fluid itself, and the clockwise or counterclockwise guiding effect of the threaded structure along the circumference of the drainage tube. The side of the U-shaped cavity closest to the patient's wound is constructed as a curved surface at an angle to the axial direction of the drainage tube, so that the U-shaped cavity coincides with the outer end face of the blunt cylindrical end of the drainage tube closest to the patient's wound. When the U-shaped cavity is completely submerged in the fluid in the patient's wound, the U-shaped cavity plays an auxiliary drainage role. When there is one U-shaped cavity that is not submerged in the fluid in the patient's wound, the U-shaped cavity that is not submerged in the fluid in the patient's wound plays a ventilation role.

2. A drainage tube for wound drainage according to claim 1, characterized in that, The one or more U-shaped cavities (201) have an angle with the adjacent U-shaped cavity (201) in the circumferential direction along the tubular drainage portion (100).

3. A drainage tube for wound drainage according to claim 1, characterized in that, The furthest distance between one or more auxiliary holes (301) of the second auxiliary drainage part (300) and the end of the tubular drainage part (100) acting on the patient's wound is less than the minimum distance between the end of the tubular drainage part (100) and the end of the tubular drainage part (100) away from the patient's wound.

4. A drainage tube for wound drainage according to claim 1, characterized in that, The axis of the drainage cavity (101) axially disposed in the tubular drainage portion (100) coincides with the axis of the tubular drainage portion (100).

5. A drainage tube for wound drainage according to claim 4, characterized in that, The radial distance between the center point of the drainage cavity (101) axially disposed in the tubular drainage portion (100) and the inner wall of the drainage cavity (101) is at least greater than the radial distance between the inner wall of the drainage cavity (101) and the outer wall of the tubular drainage portion (100).

6. A drainage tube for wound drainage according to claim 5, characterized in that, The radial cross-sectional area of ​​the drainage cavity (101) axially through the tubular drainage section (100) is greater than the radial cross-sectional area of ​​the U-shaped cavity (201), so that the drainage cavity (101) can ensure the smooth passage of wound fluid when draining the patient's wound fluid.

7. A drainage tube for wound drainage according to claim 1, characterized in that, The threaded structure of the drainage cavity (101) has a height difference in the radial direction along the tubular drainage portion (100).

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