Negative pressure drainage device for treating chronic osteomyelitis

Abstract

The negative pressure drainage device for treating chronic osteomyelitis comprises a fixing plate and a suction pipeline, a cavity is formed in the fixing plate, the suction pipeline penetrates through the cavity of the fixing plate and extends to the bottom of the fixing plate, and a collecting assembly is arranged at the end, away from the fixing plate, of the suction pipeline. The end, away from the suction pipeline, of the collecting assembly communicates with an air suction assembly, the air suction assembly communicates with an air blowing assembly, the inner bottom wall of the cavity is fixedly connected with a first extrusion block and a second extrusion block, the first extrusion block and the second extrusion block are symmetrically arranged on the two sides of the suction pipeline, and the first extrusion block and the second extrusion block are each provided with a first driving part; the inner bottom wall of the cavity is further fixedly connected with a controller, the controller is in signal connection with the first driving part, continuous negative pressure is produced through the air suction assembly, the first extrusion block and the second extrusion block are used for intermittently extruding the suction pipeline under the control of the controller, and therefore tissue fluid in the suction pipeline is pushed to flow more rapidly.

Description

Technical Field

[0001] The invention relates to the technical field of orthopedics, in particular to a negative pressure drainage device for treating chronic osteomyelitis. Background Art

[0002] Chronic osteomyelitis is a difficult-to-treat disease in the field of orthopedics. It is prone to recurrence and prolonged non-healing, which brings great pain and disability risks to patients. The key to treating chronic osteomyelitis is to completely remove the infected lesions, improve local blood circulation, and maintain effective drug concentrations to kill bacteria. Commonly used treatment methods include debridement, antibiotic bone cement filling, negative pressure sealing drainage, and bone transfer.

[0003] Among them, negative pressure sealing drainage mainly uses continuous negative pressure suction to drain pus, dead bone and other harmful substances from the affected area in time, keep the wound clean, and provide a good environment for healing. In addition, the negative pressure environment is conducive to stimulating the growth of granulation tissue, providing basic conditions for subsequent soft tissue coverage and bone healing.

[0004] At present, the existing negative pressure drainage devices mostly use drainage tubes to drain the tissue fluid in the wound surface under negative pressure when performing negative pressure drainage on the patient's wound surface. However, because there is a lot of tissue fluid in the patient's wound surface, a large amount of tissue fluid will slightly block the drainage tube, which slows down the overall drainage speed of the tissue fluid, thereby hindering the smooth discharge of the tissue fluid. Therefore, it is necessary to propose a negative pressure drainage device for treating chronic osteomyelitis. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a negative pressure drainage device for treating chronic osteomyelitis, which uses an air pump to create continuous negative pressure and uses a first squeezing block and a second squeezing block to intermittently squeeze the suction pipe under the control of a controller, thereby promoting the tissue fluid in the suction pipe to flow more quickly.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a negative pressure drainage device for treating chronic osteomyelitis, comprising a fixing plate and a suction pipe, both sides of the fixing plate are symmetrically provided with clamping components for primary fixation of the patient's limbs, one side of the clamping components is provided with a restraining component for secondary fixation of the patient's limbs, a cavity is provided inside the fixing plate, the suction pipe passes through the cavity of the fixing plate and extends to the bottom of the fixing plate, an end of the suction pipe away from the fixing plate is provided with a collecting component for collecting tissue fluid, an end of the collecting component away from the suction pipe is connected to a suction component for forming negative pressure, and the suction component is connected to a blowing component for blowing;

[0007] The top wall of the cavity is fixedly connected to the first extrusion block and the second extrusion block, which are symmetrically arranged on both sides of the suction pipe. The first extrusion block and the second extrusion block are both provided with a first driving member. The bottom wall of the cavity is also fixedly connected to the controller, and the controller is connected to the first driving member by signal.

[0008] The principle of the basic scheme is: the controller controls the first driving member to drive the first extrusion block and the second extrusion block to squeeze the suction pipe. When the suction pipe is squeezed, the diameter of the suction pipe at the squeezed part will become smaller. Since the tissue fluid is incompressible, the flow rate of the tissue fluid through any cross section of the suction pipe is constant. This is determined by the continuity principle of the fluid. Therefore, when the diameter of the suction pipe is reduced, in order to keep the flow rate unchanged, the speed of the tissue fluid passing through the suction pipe will increase. According to Bernoulli's principle, the faster the speed of the tissue fluid in the part where the diameter of the suction pipe is reduced, the smaller the pressure here. After the pressure decreases, there will be a stronger negative pressure suction, so that the tissue fluid can be sucked out more smoothly.

[0009] The beneficial effects of the basic scheme are: 1. The controller controls the first driving member to drive the first extrusion block and the second extrusion block to extrude the suction pipe, which is conducive to personalized control by medical staff and selection of different extrusion intervals according to different patient conditions.

[0010] 2. Through the squeezing of the first squeezing block and the second squeezing block, the relatively viscous tissue fluid in the suction pipe can also be smoothly sucked out, which is helpful to reduce the tissue edema of the patient's wound surface and reduce the patient's infection risk.

[0011] Furthermore, the clamping assembly includes clamping plates, and the clamping plates are hinged to the fixing plates.

[0012] The beneficial effect of the basic scheme is that due to the different injured parts and body shapes of the patients, the angle of the clamping plate can be adjusted according to the different conditions of the patients, and the use of the clamping plate is conducive to the initial fixation of the patients.

[0013] Furthermore, the restraint assembly includes a restraint belt, one end of which is fixedly connected to the clamping plate.

[0014] The beneficial effect of the basic scheme is: after using the clamping plate to initially fix the fixation plate to the injured part of the patient, the fixation plate is bound to the injured part of the patient with a restraining belt for secondary fixation, thereby improving the stability of the fixation plate, and the restraining belt can once again tighten the clamping plate when fixing the fixation plate to the injured part of the patient, thereby further improving the stability of the fixation plate.

[0015] Furthermore, the collection component includes a collection box, which is connected to the suction pipeline and is used to collect tissue fluid sucked from the patient's body.

[0016] The beneficial effect of the basic solution is that the collection box is connected to the suction pipe, and under the suction of the suction component, the tissue fluid in the suction pipe will be continuously collected in the collection box. The collection box is conducive to the centralized treatment of the tissue fluid sucked out of the patient's body by medical staff.

[0017] Furthermore, the air suction component includes an air pump, which is provided with a first air inlet end and a second air inlet end. The first air inlet end of the air pump is connected to a collection box, a filter is fixedly connected to the connection between the air pump and the collection box, the second air inlet end of the air pump is connected to the outside world, and the air sucked by the second air inlet end is used to blow air into the blowing component.

[0018] The beneficial effect of the basic solution is that the tissue fluid is sucked into the collection box by the air pump, and the filter screen helps to reduce the situation where the air pump directly sucks the tissue fluid into the air pump.

[0019] Furthermore, the blowing assembly includes a blowing pipe, which is connected to the air outlet of the air pump. An exhaust channel is also opened inside the fixed plate. A plurality of air holes are opened on the side surface of the fixed plate, which are connected to the exhaust channel. The blowing pipe is connected to the exhaust channel.

[0020] The beneficial effects of the basic scheme are: air is sucked through the second air inlet end of the air pump and then blown back to the exhaust channel through the blowing pipe. The air is discharged from the air holes through the exhaust channel, which is beneficial to increase the air permeability of the fixation plate and reduce the discomfort of the patient's limbs caused by long-term restraint. In addition, air flow will be formed when the air is discharged through the air holes. The air flow will continuously squeeze and massage the patient's skin, which is beneficial to improve the patient's blood circulation and reduce the formation of venous thrombosis.

[0021] Furthermore, a flow rate sensor is fixedly connected in the suction pipe, and the flow rate sensor is connected to the controller signal.

[0022] The beneficial effect of the basic solution is that the flow rate sensor can monitor the flow rate of the tissue fluid in the suction pipe in real time, which is helpful for medical staff to better monitor the flow of tissue fluid in the suction pipe and determine whether it is necessary to use the first squeezing block and the second squeezing block to squeeze the suction pipe.

[0023] Furthermore, a gas sterilizer is connected between the air blowing pipeline and the exhaust channel.

[0024] The beneficial effect of the basic solution is: when the air pump is pumping air into the suction pipe, the gas drawn by the air pump may be contaminated by tissue fluid and carry certain bacteria or viruses. The air can be purified in time through the gas sterilizer, which is helpful to reduce the possibility of patient infection when the air pump blows the gas back to the fixed plate.

[0025] Furthermore, the suction pipe is divided into a first pipe above the fixed plate and a second pipe below the fixed plate, a universal joint is fixedly connected at the connection point between the first pipe and the second pipe, a second driving member is provided outside the universal joint, and the second driving member is connected to the controller signal.

[0026] The beneficial effects of the basic scheme are: the universal joint is conducive to adjusting the direction of the suction pipe, sucking the tissue fluid in the patient's body from multiple directions, improving the suction efficiency of the patient's body tissue fluid, and controlling the second driving member to drive the universal joint to rotate by the controller, which is conducive to timely adjustment of the position of the suction pipe by medical staff.

[0027] Furthermore, the bottom of the fixing plate is covered with a flexible material.

[0028] The beneficial effect of the basic solution is that when the fixation plate is fixed on the patient's limb, the flexible material helps to provide a buffer layer between the patient and the fixation plate, thereby improving the patient's wearing experience and reducing the occurrence of the situation where the fixation plate is too hard and affects the patient's wearing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an axonometric view of a negative pressure drainage device for treating chronic osteomyelitis in an embodiment of the present invention.

[0030] Figure 2 It is a longitudinal cross-sectional view of a negative pressure drainage device for treating chronic osteomyelitis in an embodiment of the present invention.

[0031] Figure 3 It is a transverse cross-sectional view of a negative pressure drainage device for treating chronic osteomyelitis in an embodiment of the present invention.

[0032] Figure 4 This is a diagram of the universal joint structure of a negative pressure drainage device for treating chronic osteomyelitis in an embodiment of the present invention.

[0033] The figure marks in the drawings of the specification include: 1. fixed plate; 2. suction pipe; 3. blowing pipe; 4. collecting box; 5. air pump; 6. restraining belt; 7. clamping plate; 8. exhaust channel; 9. second extrusion block; 10. first extrusion block; 11. first pipe; 12. second pipe; 13. universal joint; 14. gas sterilizer; 15. second driving member. DETAILED DESCRIPTION

[0034] The following is further described in detail through specific implementation methods:

[0035] Example:

[0036] Basically as attached Figure 1-Figure 4As shown: A negative pressure drainage device for treating chronic osteomyelitis, including a fixing plate 1 and a suction pipe 2, both sides of the fixing plate 1 are symmetrically provided with clamping components for preliminary fixation of the patient's limbs, one side of the clamping component is provided with a restraining component for secondary fixation of the patient's limbs, the clamping component includes a clamping plate 7, the clamping plate 7 is hinged to the fixing plate 1, the restraining component includes a restraining belt 6, one end of the restraining belt 6 is fixedly connected to the clamping plate 7 by bolts.

[0037] A cavity is provided inside the fixing plate 1, and a suction pipe 2 passes through the cavity of the fixing plate 1 and extends to the bottom of the fixing plate 1. A collecting component for collecting tissue fluid is provided at one end of the suction pipe 2 away from the fixing plate 1, and an end of the collecting component away from the suction pipe 2 is connected to an air suction component for forming negative pressure, and the air suction component is connected to an air blowing component for blowing air.

[0038] The collection component includes a collection box 4, which is connected to the suction pipe 2. The collection box 4 is used to collect tissue fluid sucked from the patient's body. The suction component includes an air pump 5, which is provided with a first air inlet end and a second air inlet end. The first air inlet end of the air pump 5 is connected to the collection box 4. The connection between the air pump 5 and the collection box 4 is fixedly connected with a filter screen by bolts. The second air inlet end of the air pump 5 is connected to the outside world. The air sucked by the second air inlet end is used to blow air into the blowing component. The blowing component includes a blowing pipe 3, which is connected to the air outlet end of the air pump 5. An exhaust channel 8 is also opened inside the fixed plate 1. A plurality of air holes are opened on the side surface of the fixed plate 1. The air holes are connected to the exhaust channel 8. The blowing pipe 3 is connected to the exhaust channel 8. A gas sterilizer 14 is connected between the blowing pipe 3 and the exhaust channel 8.

[0039] The top wall of the cavity is fixedly connected with the first extrusion block 10 and the second extrusion block 9 by bolts. The first extrusion block 10 and the second extrusion block 9 are symmetrically arranged on both sides of the suction pipe 2. The first extrusion block 10 and the second extrusion block 9 are both provided with a first driving member. The first driving member is preferably a first electric control cylinder. The first electric control cylinder is fixedly connected to the top wall of the cavity by bolts. The first extrusion block 10 and the second extrusion block 9 are both fixedly connected to the output shaft of the first electric control cylinder by bolts. The bottom wall of the cavity is also fixedly connected with a controller by bolts, and the controller is connected to the first electric control cylinder signal.

[0040] A flow rate sensor is fixedly connected in the suction pipe 2 by bolts, and the flow rate sensor is connected to the controller signal. The suction pipe 2 is divided into a first pipe 11 above the fixed plate 1 and a second pipe 12 below the fixed plate 1. A universal joint 13 is fixedly connected at the connection point between the first pipe 11 and the second pipe 12 by bolts. A second driving member 15 is provided outside the universal joint 13. The second driving member 15 is preferably a second electric control cylinder. The second electric control cylinder is fixedly connected to the bottom wall of the cavity by bolts. The output shaft of the second electric control cylinder is hinged to the universal joint 13, and the second electric control cylinder is connected to the controller signal. The bottom of the fixed plate 1 is covered with a flexible material.

[0041] The specific implementation process is as follows: First, the medical staff needs to determine the injured position of the patient, and after debridement and filling of the dressing, the fixing plate 1 is applied to the injured position of the patient. Then the medical staff can place the suction pipe 2 at the wound position of the patient, and then the medical staff can adjust the angle of the clamping plate 7 according to the injured position of the patient and the patient's body shape, and the fixing plate 1 is initially fixed to the surface of the patient's limb through the clamping plate 7. After the clamping plate 7 has initially fixed the patient, the patient can be fixed for the second time through the restraint belt 6. By binding the restraint belt 6 to the patient's limb, the stability of the fixing plate 1 can be further improved, and by tightening the restraint belt 6, the initial fixation of the clamping plate 7 can be enhanced. Because the bottom of the fixing plate 1 is covered with flexible material, the direct contact between the fixing plate 1 and the patient's limb can be reduced when the fixing plate 1 is fixed to the injured limb of the patient, which is conducive to improving the wearing comfort of the patient.

[0042] After the fixing plate 1 is fixed by the clamping plate 7 and the restraining belt 6, the air pump 5 can be turned on so that the patient's wound surface is continuously subjected to the negative pressure suction force to completely suck out the tissue fluid in the wound surface. The second driving member 15 is controlled by the controller to drive the universal joint 13 to adjust the position of the second pipe 12 on the wound surface, thereby improving the suction efficiency of the second pipe 12.

[0043] The air pump 5 continuously draws the tissue fluid through the suction pipe 2 into the collection box 4, and the collection box 4 collects the sucked tissue fluid, which is beneficial for the subsequent centralized treatment of the tissue fluid in the collection box 4 by medical staff and reduces the occurrence of tissue fluid polluting the environment.

[0044] When the tissue fluid is sucked into the suction pipe 2 by the air pump 5, the flow rate sensor will continuously monitor the flow rate of the tissue fluid. If there is too much tissue fluid in the patient's wound, which affects the suction efficiency of the suction pipe 2, the flow rate sensor will monitor the change in the flow rate of the tissue fluid. At this time, the controller will control the first driving member to drive the first squeezing block 10 and the second squeezing block 9 to squeeze the suction pipe 2. By utilizing the characteristic that the tissue fluid cannot be squeezed when the suction pipe 2 is squeezed, additional pressure is generated in the squeezed area. This pressure will drive the tissue fluid in the suction pipe 2 to flow faster, thereby improving the efficiency of the suction pipe 2 in sucking the tissue fluid.

[0045] Since the connection between the collection box 4 and the air pump 5 is fixedly connected with a filter by bolts, the filter will isolate the tissue fluid inside the collection box 4, and the airflow generated by the air extraction at the second air inlet end of the air pump 5 will be re-delivered to the fixing plate 1 through the blowing pipe 3, and discharged through the exhaust channel 8 in the fixing plate 1 through the pores. After the patient wears the fixing plate 1 for a long time, the skin will inevitably feel stuffy and humid, which will affect the patient's wearing experience. After the airflow is discharged from the pores, it will promote the flow of gas on the patient's skin surface, which is beneficial to improve the patient's wearing experience. When the air is discharged through the pores, a number of air airflows will be formed. The air flow will continuously impact the skin and play a role in massaging the patient. Massaging the patient with air flow is beneficial to improving the patient's blood circulation.

[0046] When the air pump 5 continuously inhales air, since a negative pressure zone is formed between the suction pipe 2 and the wound surface of the patient, the air in the suction pipe 2 and the air pump 5 will inevitably be contaminated by tissue fluid. The gas sterilizer 14 is helpful in disinfecting the contaminated air. After the air sterilizer completes the disinfection of the air, it is transported to the stoma for blowing out.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A negative pressure drainage device for treating chronic osteomyelitis, characterized in that: The invention comprises a fixing plate (1) and a suction pipe (2), wherein clamping components for primary fixing of a patient's limbs are symmetrically arranged on both sides of the fixing plate (1), and a restraining component for secondary fixing of the patient's limbs is arranged on one side of the clamping components, a cavity is arranged inside the fixing plate (1), the suction pipe (2) passes through the cavity of the fixing plate (1) and extends to the bottom of the fixing plate (1), a collecting component for collecting tissue fluid is arranged at one end of the suction pipe (2) away from the fixing plate (1), and an end of the collecting component away from the suction pipe (2) is connected to an air suction component for forming negative pressure, and the air suction component is connected to an air blowing component for blowing air; A first extrusion block (10) and a second extrusion block (9) are fixedly connected to the top wall of the cavity. The first extrusion block (10) and the second extrusion block (9) are symmetrically arranged on both sides of the suction pipe (2). The first extrusion block (10) and the second extrusion block (9) are both provided with a first driving member. A controller is also fixedly connected to the bottom wall of the cavity. The controller is connected to the first driving member by signal.

2. The negative pressure drainage device for treating chronic osteomyelitis according to claim 1, characterized in that: The clamping assembly comprises a clamping plate (7), and the clamping plate (7) is hinged to the fixing plate (1).

3. The negative pressure drainage device for treating chronic osteomyelitis according to claim 2, characterized in that: The restraining assembly comprises a restraining belt (6), one end of which is fixedly connected to a clamping plate (7).

4. The negative pressure drainage device for treating chronic osteomyelitis according to claim 3, characterized in that: The collection assembly comprises a collection box (4), which is connected to the suction pipeline (2) and is used to collect tissue fluid sucked from the patient's body.

5. The negative pressure drainage device for treating chronic osteomyelitis according to claim 4, characterized in that: The air suction component comprises an air pump (5), the air pump (5) being provided with a first air inlet end and a second air inlet end, the first air inlet end of the air pump (5) being connected to a collection box (4), a filter screen being fixedly connected to the connection point between the air pump (5) and the collection box (4), the second air inlet end of the air pump (5) being connected to the outside, and air sucked by the second air inlet end being used to blow air into the air blowing component.

6. The negative pressure drainage device for treating chronic osteomyelitis according to claim 5, characterized in that: The air blowing assembly comprises an air blowing pipeline (3), the air blowing pipeline (3) is connected to the air outlet end of the air pump (5), an exhaust passage (8) is also provided inside the fixing plate (1), a plurality of air holes are provided on the side surface of the fixing plate (1), the air holes are connected to the exhaust passage (8), and the air blowing pipeline (3) is connected to the exhaust passage (8).

7. The negative pressure drainage device for treating chronic osteomyelitis according to claim 6, characterized in that: A flow rate sensor is fixedly connected inside the suction pipe (2), and the flow rate sensor is connected to the controller signal.

8. The negative pressure drainage device for treating chronic osteomyelitis according to claim 7, characterized in that: A gas sterilizer (14) is connected between the air blowing pipeline (3) and the exhaust channel (8).

9. The negative pressure drainage device for treating chronic osteomyelitis according to claim 8, characterized in that: The suction pipe (2) is divided into a first pipe (11) above the fixed plate (1) and a second pipe (12) below the fixed plate (1); a universal joint (13) is fixedly connected at the connection point between the first pipe (11) and the second pipe (12); a second driving member is provided outside the universal joint (13); and the second driving member is connected to a controller signal.

10. The negative pressure drainage device for treating chronic osteomyelitis according to claim 9, characterized in that: The bottom of the fixing plate (1) is covered with a flexible material.

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