39 results about "Wound drainage" patented technology

The present invention provides a sensitive, accurate, bioactive skin barrier / wafer usable in ostomy systems and wound drainage collectors for identification of pathogens at critical thresholds of presence on peristomal skin at stoma sites and exuding wounds before clinical signs and symptoms of infection present. A method of fabricating a bioactive skin barrier / wafer intended for identification of pathogen presence in ostomy systems is provided, that delivers a rapid response observable alert. The present invention utilizes biomarkers to detect pathogens in real time, where biomarkers are characteristics objectively measured as indicators of health, disease, or a response to an exposure or intervention, including therapeutic interventions.

The invention relates to the technical field of medical instruments, and discloses a passive portable negative-pressure wound drainage device based on air chemical absorption reaction, which comprises a negative-pressure drainage wound protection assembly, a negative-pressure wound treatment device and a connecting assembly, the negative-pressure drainage wound protection assembly comprises a medical film, a negative-pressure drainage dressing, a sucker and a drainage tube, the negative pressure drainage dressing covers a wound, and the medical pasting film covers the negative pressure drainage dressing and the surface of skin around the wound. The passive portable negative-pressure wound drainage device based on the air chemical absorption reaction is composed of the negative-pressure drainage wound protection assembly, the negative-pressure wound treatment device and the connecting assembly, a motor and a battery of traditional electric equipment are not needed, a hanging belt in the connecting assembly can form a space for human limbs or clothes to penetrate through, a clamp can be fixed to the clothes, and the negative-pressure wound treatment device is convenient to use. The whole body gets rid of dependence on electric power, the weight is greatly reduced, a patient can carry the device flexibly and conveniently, activity constraint is reduced, and the device can adapt to the field.

Devices and methods for managing chest or wound drainage includes a chest tube configured for insertion within a body, a drainage tube coupled with the chest tube, a reservoir coupled with the drainage tube, a pump coupled with the reservoir, and a controller in communication with the reservoir. The controller determines air leak flow rate when air is evacuated from the body and the controller determines a readiness for chest tube removal if two or more removal parameters are satisfied including: (i) the air leak flow rate is above a first threshold air leak flow rate, (ii) an average of the air leak flow rate is maintained above a second threshold air leak flow rate over a period of time, (iii) the air leak flow rate is maintained below a maximum air leak flow rate over a second period of time.

The utility model relates to the technical field of drainage devices, and discloses a negative pressure wound drainage device which comprises a drainage bottle, a bottle opening is formed in one end of the drainage bottle, a bottle cap is arranged at the top of the bottle opening, a first hose fixedly penetrates through the top of the bottle cap, and a mounting shell is arranged at one end of the first hose. A drainage hole is formed in one side of the mounting shell, a groove is formed in the mounting shell, a mounting frame is movably connected to the inner side wall of the groove, and a U-shaped block is fixedly connected to one side of the mounting frame. According to the negative-pressure wound drainage apparatus, through the arrangement of the mounting frame, the U-shaped block, the push rod, the clamping block, a limiting rod and a spring, when a worker uses the negative-pressure wound drainage apparatus, the push rod is firstly pressed to move under the limiting of the limiting rod, meanwhile, the spring is pressed, the clamping block is driven to move, and after the clamping block completely moves out of a clamping groove, the mounting frame can be pulled; and therefore, the mounting frame is detached, and the effect of replacing the device is achieved.

The utility model discloses a kind of fixed dressings for wound drainage, it is related to the technical field of medical supplies, it includes dressing, the mouth of opening is set in dressing side;Overturning covering surface, it is set in dressing, it can overturn and cover mouth, the mouth is set in the center of dressing side, the side of the mouth is all made edge treatment, the overturning covering surface includes the first fabric of setting in the side of dressing, one end of the first fabric near the mouth is provided with second fabric, mouth is clamped on drainage tube, then overturn first fabric, then overturn second fabric, then second fabric is laid on dressing, whereby drainage tube is arranged in the center of dressing, finally using adhesive tape to stick dressing can, by the structure design, so the assembly of drainage tube and skin place dressing can be completed, and the interference of dressing to drainage tube can be reduced, and the flatness of dressing can also be guaranteed.

A wound draining pump system that prevents the cross contamination of a patient's wound and that allows the patient's wound and incision to heal faster. The wound drainage pump system comprises a rigid rectangular cartridge holder. A collapsible tank that has a negative pressure suction pump front end, the collapsible tank inserts within the rectangular cartridge holder. A surgical grade tube that connects to the negative pressure suction pump and to an absorption tip. The absorption tip is placed on the wound of the patient. And, an adhesive holder that secures the absorption tip on the wound of the patient.

1. The name of the design product: negative pressure wound therapy instrument. 2. The use of the design product: the design product is mainly used to produce controllable negative pressure for wound drainage and provide pulse directional electric field for wound surface, relieve local pain and promote wound healing. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model provides a kind of for chronic wound leakage negative pressure drainage device, it is related to medical instrument technical field, including auxiliary bandage, protective shell, storage tank, suction pressure tank, pressure tank, rotating disc, connecting disc and connecting screw;The inside of connecting disc is equipped with a group of circular grooves, and the bottom of connecting disc is connected with nursing adhesive film, and the circular groove of the inside of connecting disc is connected with rotating disc bottom rotation snap fit;Two groups of circular thread connection holes are respectively arranged on the both sides connecting plate of the top of suction pressure tank. Set rotating disc, only need to connect device on wound through nursing adhesive film, rotating disc can rotate, so that people can also move at will when wearing. Set auxiliary bandage, device can be directly bound on body, increase portability. Set the controller outside protective shell, accurately control air pressure, make it adapt to different injury conditions, and replaceable storage tank.

The utility model discloses a pressure controllable wound drainage device which comprises a drainage tube and further comprises a negative pressure generator, a pressure adjusting device and a three-way valve, the pressure adjusting device is arranged in the negative pressure generator, and pressure generated in the negative pressure generator is controllably adjusted through the pressure adjusting device. One end of the three-way valve is detachably arranged on the negative pressure generator through threads, the other end of the three-way valve is connected with the drainage tube, and the tightness of the drainage tube on the three-way valve is adjustable. The drainage device has the advantages that the spiral connector on the three-way valve is connected with the air guide tube and the drainage tube, connection is tighter, meanwhile, different control effects can be conveniently achieved, a plastic exhaust port of an original drainage device is omitted, repeated pulling and inserting of the plastic exhaust port are avoided, the infection opportunity is reduced, iatrogenic cross infection is completely eradicated, and drainage liquid backflow during pressure adjustment is prevented; the pressure adjusting device is used for adjusting the internal pressure of the negative pressure generator, different pressures in the negative pressure generator are controlled through a multi-gear structure of the pressure adjusting device, and different suction effects are achieved.

This invention discloses a neck-chest fit adjustable anti-displacement thyroid surgery wound drainage care device, belonging to the field of medical device technology. It includes a neck brace, comprising a chest-fitting frame, a support beam, and a neck pad. The chest-fitting frame is suspended from the shoulders and extends to the front of the chest. The support beam is rotatably mounted on the upper surface of the chest-fitting frame and used to support the chin. This invention allows for simultaneous and precise adjustment of the support beam's rotation angle by adjusting the specific position of the rising section on the outer frame and the height of the inner lining strip within the outer frame. This effectively adapts to the individual differences in neck length and physiological curvature among different patients. After adjustment, the locking strip firmly engages with the corresponding T-slot, thus achieving flexible and reliable adjustment of the overall fit between the neck brace and the patient's neck and chest. This fundamentally avoids the problems of traditional fixation devices, which are often unable to adapt to different patient body shapes due to rigid structures, resulting in insufficient fit and easy displacement.

The invention discloses an intelligent control type negative pressure wound drainage device and method, and relates to the field of biomedical engineering, the intelligent control type negative pressure wound drainage device is negative pressure drainage equipment with a flushing function, the intelligent control type negative pressure wound drainage device comprises a negative pressure machine, a peristaltic pump for cleaning a wound is arranged on the outer surface of the negative pressure machine, and a connecting device is arranged on one side of the negative pressure machine; a drainage bottle is fixedly arranged at the movable end of the connecting device, a bottle cap is arranged on the top face of the drainage bottle, a sealing buckle used for locking the drainage bottle is arranged on the outer surface of the bottle cap, connectors are symmetrically arranged in the bottle cap in a penetrating mode and communicated with the interior of the bottle cap, drainage tubes are inserted into the outer surfaces of the connectors, and a drainage bag used for containing wound exudate is arranged on one side of the bottle cap. According to the drainage bottle, the sliding block moves up and down to drive the first connecting rod and the second connecting rod to push the supporting plate to make contact with the inner wall of the drainage bottle, the wall of the drainage bottle is evenly supported from multiple points in the drainage bottle, local stress is reduced, and breakage of the drainage bottle body is avoided.

The utility model provides a negative pressure drainage device, which belongs to the technical field of medical instruments for the hepatobiliary department, aims to solve the problem that the negative pressure adjustment is difficult to be manually adjusted to adapt to the body recovery state, and comprises a drainage piece, the drainage piece comprises a liquid accumulation bottle and a blanking cap, the blanking cap is in threaded connection to the bottom of the liquid accumulation bottle, and the liquid accumulation bottle is sleeved with a bracket; the negative pressure adjusting part comprises a fixing pipe and a piston rod, the piston rod is clamped in the fixing pipe, and the top end of the piston rod is fixedly connected with a connecting plate; and an adjusting rod is clamped in the connecting plate. After the knob plate is rotated, the adjusting rod is driven to rotate upwards and move, the connecting plate is driven by the two baffles to move upwards synchronously, the piston rod pulls the piston piece to move upwards to extract gas in the negative pressure bottle so as to increase the pressure difference of negative pressure, the pressure change after hydrops drainage or hydrops discharge is balanced, it is ensured that a user feels comfortable, pipe closing can be gradually adapted, and the operation is convenient. Therefore, rehabilitation is accelerated, and tube drawing time is shortened.

This invention discloses a wound drainage tube fixation device, belonging to the field of medical auxiliary device technology. Specifically, it is a wound drainage tube fixation device comprising a main fixing base with auxiliary fixing wings at both ends and a skin protective pad made of hydrocolloid or silicone gel dressing at the lower end, providing anti-allergy and exudate absorption functions. A malleable fixing track, made of metal tubing or malleable plastic strip, is provided on the upper end of the main fixing base, which can be shaped according to the drainage tube's direction. An upper covering fixing strap is also provided on the upper end of the main fixing base, fixed at one end and connected at the other end via hook and loop fasteners. Its end face has a transparent observation window with graduated lines for marking the insertion depth of the drainage tube. The auxiliary fixing wings are covered with a medical pressure-sensitive adhesive layer. An observation window can be opened in the center of the device, and the edges of all components are designed with smooth arcs. This device is reliably fixed, flexibly shaped, easy to observe, and protects the skin.

The utility model discloses a kind of negative pressure drainage devices, it relates to medical equipment technical field, including top plate, bottom plate and bellows, bellows is fixedly connected between top plate and bottom plate, telescopic stand, the both sides of top plate are fixedly connected with side pole, telescopic stand is rotatably connected in the lower end of side pole, telescopic stand includes threaded tube, screw rod and support foot, screw rod is fixedly connected in the upper end of support foot, screw rod is threadedly connected in one end of threaded tube, one end of threaded tube is provided with connecting disc, the included angle of connecting disc center axis and threaded tube center axis is 135 degrees, telescopic stand limit bottom plate, telescopic stand rotates 180 degrees and after extension, support top plate, bottom plate is moved under its gravity, negative pressure is generated in bellows, after connecting hose on top plate upper end, it can be extracted liquid in patient's body through hose, solve the problem that current negative pressure drainage device is used to high environment requirement, need to have appropriate hanging point and need additional medical staff to participate operation.

The invention relates to the technical field of medical apparatus and instruments, and discloses a wound negative pressure drainage suit which comprises a drainage bottle, a drainage tube and a puncture needle, the upper portion of the drainage bottle is fixedly connected with a port, the periphery of the upper portion of the port is in threaded connection with a top cover, the periphery of the top cover is fixedly connected with a fixing ring, and the lower portion of the fixing ring is fixedly connected with a breaking convex block. An easy-to-fold tube is arranged on the right side of the upper portion of the drainage bottle, a safety valve is fixedly connected to the upper end of the easy-to-fold tube, a needle head is fixedly connected to the middle of the top cover, a connector is fixedly connected to the upper end of the needle head, a sealing film is fixedly connected to the lower side in a port, a transparent frame is arranged on the front portion of the drainage bottle, and a fluorescent floating ball is arranged in the transparent frame. According to the wound negative pressure drainage suit, through cooperation of the transparent frame, the scales, the through hole, the fluorescent floating ball and the safety helmet, medical staff can conveniently and rapidly observe the amount of effusion in the drainage bottle, and then the full drainage bottle is replaced in time.

The utility model relates to a transarmpit endoscopic thyroid surgery pressurizing belt which comprises a pressurizing belt body. The pressure bag is arranged on the pressurizing belt in a wrapping manner, and the pressure bag is used for pressurizing an operation wound surface area; the pressure bag is arranged on the pressurizing belt, the Velcro is arranged on the pressurizing belt and used for bonding and fixing the pressurizing belt, the pressurizing belt and the pressure bag are made of hemp cotton materials, the width of the pressurizing belt is 6-8 cm, the length of the pressurizing belt is 50-100 cm, the pressurizing belt is provided with three ends which are a short end A, a short end B and a long end, and the three ends of the pressurizing belt are fixedly connected with the Velcro. The pressure bag comprises a rectangular pressure bag and a triangular pressure bag, and the rectangular pressure bag is connected with the pressurizing belt in a wrapping manner and is arranged in an area below an armpit and a clavicle in a wrapping manner; and the triangular pressure bag is connected with the pressurizing belt in a wrapping manner. According to the utility model, the armpit wound surface can be fully pressed, and the wound surface above and below the clavicle can be fully pressurized, so that the purpose of fully pressurizing is achieved, and postoperative wound surface drainage liquid is obviously reduced.

The utility model relates to the technical field of medical instruments, and discloses a wound drainage fixing device which comprises a first fixing block and a second fixing block, one end of the first fixing block is provided with a telescopic groove, one end of the telescopic groove is communicated with two grooves, the inner walls of the two grooves are provided with fixing plates, and the fixing plates are connected with the telescopic groove. Limiting columns are fixedly connected to one ends of the two fixing plates, mounting grooves are formed in the ends, close to the second fixing blocks, of the first fixing blocks, and the limiting columns extend into the mounting grooves; through the structures such as the mounting plate, the mounting groove, the limiting column, a spring, a telescopic plate, a fixing plate and the limiting column, the effects that the limiting column can be clamped into the limiting groove, then the drainage tube can be rapidly fixed, and the mounting and fixing efficiency is improved are achieved, and the problem that in the traditional use process, overturning clamping needs to be used for limiting and fixing, and the use efficiency is affected is solved. The steps are increased during mounting and fixing, and the fixing efficiency is influenced.

The invention relates to a multifunctional walking aid integrated with an adjustable medical equipment bearing system, and relates to the technical field of medical instruments. Comprising a walking aid body, a first hook device, a second hook device and an infusion support. The first hook device is arranged on the walking aid body in a horizontal sliding manner and is used for placing a urine bag; the second hook device is arranged on the walking aid body in a sliding manner, and the second hook device is used for hanging the wound drainage device and adjusting the height of the wound drainage device; the infusion support is arranged on the walking aid body, a third hook device is arranged on the infusion support in a sliding mode, and the third hook device is used for hanging the analgesia pump and adjusting the height of the analgesia pump. And the first hook device, the second hook device and the third hook device are arranged in a sliding manner, so that the problem that the activity of a patient is limited due to the fact that an existing walking aid does not consider the requirement of the postoperative patient for carrying various medical equipment is solved.

The invention relates to the technical field of negative pressure drainage, and discloses an integrated dressing and pressure pump integrated negative pressure drainage device which comprises a back plate, a dressing and a shell, the dressing is connected with the back plate, the shell is installed on the back plate, a liquid suction pipe is installed in the shell, and a connector is arranged on the portion, located on the outer wall of the shell, of the liquid suction pipe. The back plate is provided with a connector connected with dressing, the connector is matched with the connector, a negative pressure pump is installed in the shell, and the two ends of the negative pressure pump are connected with an exhaust pipe and an exhaust pipe which are arranged in the shell. The dressing, the back plate, the negative pressure pump arranged in the shell and other core structures are integrally designed, the wound surface treatment equipment with multiple functions of wound surface sealing, negative pressure drainage, accurate pressure regulation and control, portable use and the like is formed, wound surface exudate can be efficiently drained, and the local microenvironment of the wound surface can be optimized; the device is suitable for various clinical scenes such as acute trauma, chronic refractory wound surface and postoperative wound surface drainage.

The invention discloses a portable pressure-adjustable wound surface drainage structure, relates to the technical field of wound surface treatment, and aims to solve the problems that traditional wound surface drainage equipment is poor in portability, the negative pressure is easy to interrupt, the pressure is difficult to accurately regulate and control, and the seepage treatment efficiency is low. The upper end of the dressing is connected with a negative pressure part, and the lower end of the dressing is sequentially connected with an adsorption layer and a gel layer; a hard top cover is arranged in the middle of the dressing, a first connecting port is formed in the top cover, the negative pressure part is composed of a negative pressure part and a piston, the negative pressure part is provided with a second connecting port and is in butt joint with the first connecting port, and the piston is inserted into the negative pressure part, slides under the action of external force and forms an inner cavity with the negative pressure part. The negative pressure piece can be transversely or longitudinally installed to meet the requirements of different patients, a fiber support is arranged between the dressing and the adsorption layer to prevent the adsorption layer from collapsing, a net-shaped pressing plate is installed on the top cover to promote seepage to be discharged, and the negative pressure piece is provided with a sampling connector to facilitate seepage sampling. The structure is high in portability, can efficiently treat wound exudate, and is suitable for being used in multiple scenes.

A wound draining pump system that prevents the cross contamination of a patient's wound and that allows the patient's wound and incision to heal faster. The wound drainage pump system comprises a rigid rectangular cartridge holder. A collapsible tank that has a negative pressure suction pump front end, the collapsible tank inserts within the rectangular cartridge holder. A surgical grade tube that connects to the negative pressure suction pump and to an absorption tip. The absorption tip is placed on the wound of the patient. And, an adhesive holder that secures the absorption tip on the wound of the patient.

To provide trocars used for advancing wound drain catheters through tissue.SOLUTION: A trocar 100 includes a shaft having a leading section 104, a trailing section 112, a reduced diameter midsection 110 located between the leading and trailing sections, and a longitudinal axis extending along the length of the shaft 102. The leading section of the shaft has a tapered region 106 that terminates at a blunt tip 108. The trailing section of the shaft has a connector 114 located at a trailing end of the shaft. The leading and trailing sections of the shaft have a first diameter, and the reduced diameter midsection of the shaft has a second diameter that is smaller than the first diameter for enabling the shaft to be bent at the reduced diameter midsection. A flexible wound drain catheter having a first end is secured to the connector at the trailing end of the trailing section of the shaft, and has an outer diameter that matches the first diameter of the leading and trailing sections of the shaft.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of drainage liquid collection, and discloses an integrated small-volume wound drainage liquid collection bag which comprises an improved ostomy bag, a transparent isolation bag is connected to the inner wall of the improved ostomy bag, a pasting type bottom bag is arranged on the outer wall of the transparent isolation bag, a medical hose is connected to the outer wall of the transparent isolation bag, and the medical hose is connected with a wound drainage liquid collection bag. The inner wall of the medical hose is connected with an elastic spring, the outer wall of the elastic spring is connected with a valve head, the inner wall of the medical hose is provided with a through hole, and the outer wall of the improved ostomy bag is connected with a connector. Generally, when gauze is used for dressing change clinically, wetted gauze cannot accurately measure exudate, so that in order to reduce the infection probability, accurately measure the exudate and reduce the workload of clinical nurses and doctors, the miles postoperative ostomy bag and the Conway anti-reflux drainage bag are integrated into an integrated small-capacity wound drainage liquid collecting bag on the basis of the design of the miles postoperative ostomy bag and the Conway anti-reflux drainage bag.

The invention discloses a negative pressure drainage system for intestinal tract ventilation and defecation, and belongs to the technical field of intestinal tract ventilation and defecation. The drainage tube is communicated with the inlet in the collecting frame; the insertion part is fixedly mounted at one end, far away from the collection frame, of the drainage tube; wherein the insertion part has at least two forms: when the insertion part is in the first form before being inserted into the body of a patient, the end, far away from the drainage tube, of the insertion part is in an inward-contracted cone shape; when the insertion part is in a second form after being inserted into the body of the patient, the end, away from the drainage tube, of the insertion part is in an externally-expanded horn shape, a fixing bag is arranged on the outer side of the end, close to the insertion part, of the drainage tube, an air inlet tube is installed on the fixing bag, a sealing clamp is installed on the air inlet tube, and an expansion part is arranged between the fixing bag and the insertion part; the insertion part can be switched between at least two forms, insertion is facilitated when the insertion part is in the first form, and drainage is facilitated when the insertion part is in the second form.

The anti-backflow drainage box comprises a bag body and a support assembly, a drainage tube is arranged on the upper portion of the bag body, a liquid outlet is formed in the lower portion of the bag body, the support assembly is used for supporting the bag body, the support assembly comprises two fixing frames and two sets of hinge rods, the two fixing frames are fixedly connected to the bag body, liquid level marks are arranged on the fixing frames, and the two sets of hinge rods are hinged to the two fixing frames. The two hinge rods correspond to the two fixing frames respectively, one ends of the two hinge rods are hinged to the corresponding fixing frames respectively, and the ends, away from the corresponding fixing frames, of the two hinge rods are hinged to each other respectively. When the two sets of hinge rods rotate till the axes are parallel to each other, the two fixing frames and the two sets of hinge rods support the bag body, the possibility that wrinkles appear on the surface of the bag body and the bag body is squeezed is reduced, the amount of wound drainage liquid in the bag body can be observed conveniently, and the possibility that scale records are inaccurate is reduced; the volume of the drainage box is reduced, and a patient who needs to carry the drainage box to go out is convenient to carry.

This application discloses a smart-controlled negative pressure wound drainage device and method, relating to the field of biomedical engineering. It is a negative pressure drainage device with a rinsing function, including a negative pressure unit. A peristaltic pump for cleaning the wound is provided on the outer surface of the negative pressure unit. A connecting device is provided on one side of the negative pressure unit, and a drainage bottle is fixedly mounted on the movable end of the connecting device. A bottle cap is provided on the top surface of the drainage bottle, and a sealing buckle for locking the drainage bottle is provided on the outer surface of the bottle cap. A connector is symmetrically arranged and connected through the inside of the bottle cap, and a drainage tube is inserted into the outer surface of the connector. A drainage bag for collecting wound exudate is provided on one side of the bottle cap, and an external support mechanism for providing additional support to the drainage bottle is provided on the outer surface of the bottle cap. This application utilizes a slider moving up and down to drive connecting rod one and connecting rod two to push a support plate into contact with the inner wall of the drainage bottle, uniformly supporting the drainage bottle wall from multiple points inside, reducing local stress and preventing the drainage bottle from breaking.

This invention discloses a portable, pressure-adjustable wound drainage structure, relating to the field of wound treatment technology, aiming to solve the problems of poor portability, easy interruption of negative pressure, difficulty in precise pressure control, and low efficiency in exudate treatment of traditional wound drainage devices. It includes a dressing with an adhesive coating on the outer periphery of its lower end, a negative pressure unit connected to the upper end of the dressing, and an absorbent layer and a gel layer connected sequentially to the lower end. A rigid top cover is provided in the middle of the dressing, with a first connection interface on the top cover. The negative pressure unit consists of a negative pressure component and a piston. The negative pressure component has a second connection interface that connects to the first connection interface. The piston is inserted into the negative pressure component and slides under external force, forming an inner cavity with the negative pressure component. The negative pressure component can be installed horizontally or vertically to adapt to different patient needs. A fiber scaffold is provided between the dressing and the absorbent layer to prevent the absorbent layer from collapsing. A mesh pressure plate is installed on the top cover to promote exudate drainage. A sampling interface is provided in the negative pressure component for convenient exudate sampling. This structure is highly portable, can efficiently treat wound exudate, and is suitable for use in multiple scenarios.

The utility model relates to the technical field of medical instruments, and discloses a negative pressure wound drainage device which comprises a drainage bottle, a containing assembly is installed on the surface of the drainage bottle, and a sealing cover is arranged at an opening of the drainage bottle. According to the negative pressure wound drainage device, through the arrangement of the connecting pipe, the mounting pipe, the sector plate, the clamping block and the first spring, when the negative pressure wound drainage device is used, a fixing pipe is held firstly, the sector plate is aligned with a sector groove of the connecting pipe to be inserted, after the mounting pipe is completely inserted, the fixing pipe is rotated to drive the sector plate to rotate through the mounting pipe, and the sector plate rotates along with rotation of the sector plate; when a fan-shaped plate rotates to a specific angle, the edge of the fan-shaped plate gradually pushes a clamping block, the clamping block moves towards the interior of a circular groove, a first spring is compressed in the process, when the fan-shaped plate rotates to the specific angle, the clamping block is aligned with a spherical groove in the fan-shaped plate, and at the moment, the first spring releases elastic potential energy to push the clamping block to be clamped into the spherical groove; therefore, the stable connection between the mounting pipe and the connecting pipe is realized.