Precise chest drainage bag

Abstract

The invention provides a precise chest drainage bag. The precise chest drainage bag comprises a drainage connecting tube, a hard precise metering drainage box and a liquid gathering drainage bag which are communicated in sequence, the upper parts of adjacent side walls of the precise metering drainage box and the liquid gathering drainage bag are detachably fixed; a box liquid outlet is formed in the lower end of the precise metering drainage box, a bag liquid inlet is formed in the upper side of the liquid gathering drainage bag, the bag liquid inlet is lower than the outlet level of the drainage connecting pipe, and a connecting hose is arranged to communicate the box liquid outlet with the bag liquid inlet; a water seal exhaust pipe and an elastic bag for observing negative pressure change are arranged on the upper side wall of the precise metering drainage box; the thoracic cavity drainage device can observe and exhaust thoracic cavity gas during thoracic cavity drainage, observes the unobstructed condition of the drainage tube, accurately judges the instant liquid drainage speed and total drainage amount, is light in weight, facilitates early-stage out-of-bed activities, facilitates rapid rehabilitation, and is simple in structure, low in cost, convenient to use and easy to popularize.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, in particular to a precision chest drainage bag. Background Art

[0002] Drainage is extremely important in medical treatment. It is used to discharge abnormal fluid or gas in the cavity, avoid compression of surrounding tissues, reduce the risk of infection, and promote recovery.

[0003] The current water seal bottles used for chest drainage are bulky and heavy, hindering early postoperative mobility and the concept of rapid recovery. Furthermore, during drainage, only the total volume of drainage can be measured, making it difficult to accurately assess the drainage rate.

[0004] There is an urgent need in the clinic for a drainage bag that is inexpensive, lightweight, and can accurately determine the instant drainage speed, so as to facilitate the judgment of instant changes in drainage conditions and deal with them; it is beneficial for patients to get out of bed early after surgery and recover quickly. Summary of the Invention

[0005] In response to the above-mentioned defects of the prior art, the present invention provides a precision chest drainage bag, comprising a drainage tube, a rigid precision metering drainage box, a connecting hose, and a liquid collecting drainage bag, which are sequentially connected. The volume of the precision metering drainage box is smaller than that of the liquid collecting drainage bag, and the upper portions of the adjacent side walls of the precision metering drainage box and the liquid collecting drainage bag are detachably fixed.

[0006] The lower end of the precision metering drainage box is provided with a liquid outlet, and the upper cover is connected to the inner cavity to provide a water-sealed exhaust pipe and a temporary air inlet; the lower end opening of the water-sealed exhaust pipe is provided with a water-blocking and breathable membrane, and an appropriate amount of water-sealed liquid is poured into the water-sealed exhaust pipe; the temporary air inlet is provided with a matching cover;

[0007] A bag liquid inlet is set on the upper side of the liquid collection drainage bag, and the box liquid outlet is lower than the bag liquid inlet and lower than the connecting port of the drainage connecting tube at the precision metering drainage box and the lower end opening of the water seal exhaust pipe; a connecting hose connects the box liquid outlet and the bag liquid inlet.

[0008] Furthermore, the detachable fixing positions of the precision metering drainage box and the liquid collecting drainage bag are respectively provided with matching Velcro suede or burr surface, or matching snap buckles.

[0009] Furthermore, at least one elastic tube clamp matching the outer diameter of the connecting hose is provided at a portion of the outer wall of the liquid collecting drainage bag corresponding to the connecting hose.

[0010] Furthermore, the volume of the precision metering drainage box is less than 200 ml, the volume of the liquid collecting drainage bag is 1000-3000 ml, and a switch drain port is provided below the liquid collecting drainage bag.

[0011] Furthermore, a sealing cap is provided to cover the upper opening of the water-sealed exhaust pipe, and a water-blocking and breathable membrane is provided inside the sealing cap.

[0012] Furthermore, the inner diameter of the drainage tube is 5-12 mm.

[0013] Furthermore, a negative pressure change observer is provided at the upper end of the precision metering drainage box, and the negative pressure change observer includes an elastic bag with a deformation limit of 3-8 cmH2O or an electronic pressure gauge; the elastic bag is configured as a bellows with one side closed.

[0014] Furthermore, an infrared detector and a timer are arranged adjacent to the ring-shaped connecting hose below the liquid inlet of the bag. The infrared detector is provided with an infrared emitting device on one side of the connecting hose, and an infrared receiving device is provided on the other side of the corresponding connecting hose; the timer starts timing when the connecting hose is empty and stops timing when the connecting hose is filled with liquid.

[0015] Beneficial effects of the present invention:

[0016] 1. A water-sealed exhaust pipe and a negative pressure observer are installed above the rigid precision-metered drainage box, which can quickly discharge the gas drained from the chest cavity and observe the patency of the drainage tube.

[0017] 2. The combination of a small-volume precision metering drainage box and a large-volume liquid-collecting drainage bag can not only accurately observe the instant drainage speed and detect abnormal drainage conditions in a timely manner, but also will not affect the drainage process when not in operation.

[0018] 3. It is light in weight and can replace the bulky water seal bottle. It is safe and convenient, and can help patients get out of bed and move around early, which is conducive to their rapid recovery.

[0019] 4. The infrared detector and timer can be used together to record the changes in drainage speed during the drainage process, comprehensively judge the progress of liquid drainage disease and deal with it accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the first embodiment of the present invention (wherein a is an overall structural diagram, b is a schematic diagram of the rigid precision metering drainage box, c is a partial enlarged view of the air inlet, and d is a partial enlarged view of the first water-sealed exhaust pipe);

[0021] Figure 2 Schematic diagram of the structure of the second embodiment of the present invention (wherein a is an overall structural diagram, b is a schematic diagram of the rigid precision metering drainage box, c is a partial enlarged view of the air inlet, and d is a partial enlarged view of the second water-sealed exhaust pipe);

[0022] Figure 3 For the present invention Figure 2 A schematic structural diagram of the gas-liquid drainage state of the embodiment;

[0023] Figure 4 For the present invention Figure 1 or Figure 2In the embodiment, the use state diagram of discharging the drainage liquid in the precision metering drainage box into the liquid collecting drainage bag;

[0024] Figure 5 The third embodiment of the present invention ( Figure 2 A schematic diagram of the structure of an infrared detector and a timer in the embodiment;

[0025] Figure 6 For the present invention Figure 2 Schematic diagram of the explosion structure of the top cover of the precision metering drainage box in the embodiment;

[0026] Figure 7 This is a schematic structural diagram of the elastic pipe clamp of the present invention;

[0027] Figure 8 Schematic diagram of the structure of the connecting fittings at the liquid inlet of the bag of the present invention (wherein a is a front view, b is a back view, c is a front view of the air inlet, and d is an AA cross-sectional view);

[0028] Figure 9 For the present invention Figure 5 Quantitative time-sharing flow rate curve diagram generated by the embodiment;

[0029] In the figure,

[0030] 1. Drainage connecting tube; 2. Precision metering drainage box; 20. Box tube drainage plane; 21. Box liquid outlet; 22. Connecting port; 23. Water seal exhaust pipe; 24. Negative pressure change observer; 25. Temporary air inlet; 3. Connecting hose; 4. Liquid collection drainage bag; 41. Bag liquid inlet; 42. Switch drain port; 43. Elastic tube clamp. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention and to make the above-mentioned features, purposes and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with examples. The examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0032] like Figure 1 The figure shows the structure of the first embodiment of the precision chest drainage bag of the present invention, which is used for drainage of liquid and gas in the chest cavity, including a drainage tube 1, a hard precision metering drainage box 2, a connecting hose 3 and a liquid collecting drainage bag 4 connected in sequence; the volume of the precision metering drainage box 2 is smaller than that of the liquid collecting drainage bag 4.

[0033] The drainage tube 1 is used to connect with the chest drainage tube, and the liquid and gas in the chest cavity enter the precision metering drainage box 2 through the drainage tube 1. The liquid entering the precision metering drainage box 2 is temporarily stored in the precision metering drainage box 2; when the liquid accumulation reaches a certain volume, the liquid height gradually increases, and after the liquid height exceeds the connecting hose 3, the liquid enters the liquid collection drainage bag 4 through the connecting hose 3. The outer wall of the precision metering drainage box 2 is printed with a relatively precise capacity scale (such as the minimum volume unit is 5ml), which can read the amount of liquid in the precision metering drainage box 2; the outer wall of the liquid collection drainage bag 4 is printed with a relatively rough capacity scale (such as the minimum volume unit is 50ml), which can read the amount of liquid in the liquid collection drainage bag 4; the sum of the liquid amounts in the precision metering drainage box 2 and the liquid collection drainage bag 4 is the total amount of drainage liquid.

[0034] The precision metering drainage box 2 has a liquid outlet 21 at its lower end. The upper cover, connected to the inner cavity, houses a water-sealed exhaust pipe 23 and a temporary air inlet 25. The lower opening of the water-sealed exhaust pipe 23 is fitted with a water-blocking, breathable membrane, and a suitable amount of water-sealing fluid is injected into the pipe. The temporary air inlet 25 is fitted with a matching cap. This structure facilitates the observation and drainage of thoracic gas. A water-sealing fluid height of 3-5 cm is optimal. During normal drainage, the cap seals the temporary air inlet 25, keeping it closed.

[0035] When the patient exhales, the pressure in the chest cavity increases, and the gas in the chest cavity is discharged through the chest drainage tube, and enters the hard precision metering drainage box 2 through the drainage tube 1. The water-blocking and breathable membrane set in the upper space of the precision metering drainage box 2 pushes the water-sealing liquid in the water-sealing exhaust pipe 23 through the opening at the lower end of the water-sealing exhaust pipe 23, and enters the water-sealing exhaust pipe 23, and then is directly discharged to the outside through the upper opening of the water-sealing exhaust pipe 23; when the gas is discharged, bubbles can be clearly seen escaping through the water-sealing liquid in the water-sealing exhaust pipe 23, which is convenient for medical staff to observe the patient's chest exhaust status; when the patient inhales, the pressure in the chest cavity drops, and due to the sealing effect of the water-sealing liquid in the water-sealing exhaust pipe 23 on the water-blocking and breathable membrane, external gas cannot enter the precision metering drainage box 2.

[0036] In this way, as the patient breathes, the gas in the chest cavity is discharged to the outside under the one-way exhaust action of the water seal exhaust pipe 23, achieving the effect of perfect drainage of the gas in the chest cavity.

[0037] The upper parts of the adjacent side walls of the precision metering drainage box 2 and the liquid collecting drainage bag 4 are detachable and fixed; a box liquid outlet 21 is provided at the lower end of the precision metering drainage box 2, and a bag liquid inlet 41 is provided on the upper side of the liquid collecting drainage bag 4, the box liquid outlet 21 is lower than the bag liquid inlet 41 and is lower than the level of the connecting port 22 of the drainage connecting tube 1 in the precision metering drainage box 2; a connecting hose 3 connects the box liquid outlet 21 and the bag liquid inlet 41.

[0038] like Figure 2The figure shows a schematic diagram of the structure of the second embodiment of the present invention, in which a water-blocking and breathable membrane is provided to cover the upper opening of the water-seal exhaust pipe 23. The function of the water-blocking and breathable membrane is to prevent the top of the water-seal liquid column from exceeding the upper opening of the water-seal exhaust pipe 23 when the precision metering drainage box 2 is tilted, thereby preventing the water-seal liquid from leaking due to the top of the water-seal liquid column exceeding the upper opening of the water-seal exhaust pipe 23, thereby improving the safety of the product. Furthermore, in order to reduce the evaporation of the water-seal liquid during the storage time before the product is used, the water-seal exhaust pipe 23 is not equipped with water-seal liquid during transportation, and water-seal liquid is injected into the water-seal exhaust pipe 23 before the product is used. In order to facilitate the filling of water-seal liquid into the water-seal exhaust pipe 23, a matching cover is provided at the upper opening of the water-seal exhaust pipe 23, a hollow area is provided in the middle of the cover, and a water-injected and breathable membrane is provided to cover the hollow area. When in use, the cover is opened to fill the water-seal exhaust pipe 23 with water-seal liquid. After the water-seal liquid is filled, the cover is sealed and fixed to the upper opening of the water-seal exhaust pipe 23.

[0039] like Figure 3 As shown, the present invention Figure 2 In the diagram of the embodiment of the gas-liquid drainage implementation, intrathoracic drainage fluid flows out through the drainage tube and enters the precision metering drainage box 2 through the drainage connecting tube 1 at the connection port 22. Because the inner cavity of the precision metering drainage box 2 is connected to the connecting hose 3, a small amount of fluid that enters the precision metering drainage box 2 flows into the connecting hose 3. In a calm state, the liquid levels in the precision metering drainage box 2 and the connecting hose 3 are at the same level, referred to herein as the box-tube drainage plane 20. When the patient exhales, the liquid level in the precision metering drainage box 2 is higher than the liquid level in the connecting hose 3; when the patient inhales, the liquid level in the precision metering drainage box 2 is lower than the liquid level in the connecting hose 3.

[0040] As the amount of liquid entering the precision metering drainage box 2 increases, the liquid level in the connecting hose 3 gradually rises along with the liquid level in the precision metering drainage box 2, and gradually approaches the bag liquid inlet 41. Since the box liquid outlet 21 is lower than the bag liquid inlet 41 and lower than the level of the connecting port 22 of the drainage connecting tube 1 in the precision metering drainage box 2, the box tube drainage plane 20 first reaches the bag liquid inlet 41 before rising to and blocking the drainage inlet (connecting port 22); thereafter, the liquid entering the precision metering drainage box 2 cannot cause the liquid volume in the precision metering drainage box 2 to continue to increase; the excess liquid directly enters the connecting hose 3 through the box liquid outlet 21, and directly enters the liquid collecting drainage bag 4 through the bag liquid inlet 41. The liquid collecting drainage bag 4 has a very large volume, and medical staff will empty the bag before it is full during regular ward rounds, which will not hinder the drainage process.

[0041] The upper part of the adjacent side wall of the precision metering drainage box 2 and the liquid collecting drainage bag 4 can be detachably fixed. Figure 4 As shown, Figure 2In the embodiment, the liquid in the precision metering drainage box 2 is emptied into the liquid collecting drainage bag 4. When the liquid in the precision metering drainage box 2 needs to be emptied, the drainage tube 1 or the chest drainage tube is clamped to temporarily interrupt the drainage ( Figure 4 The middle part is to clamp the Robert clamp set on the drainage tube 1 to block the drainage tube 1), temporarily remove the sealing cap on the temporary air inlet 25, so that the temporary air inlet 25 is open, so that the inner cavity of the precision metering drainage box 2 is connected with the outside world through the temporary air inlet 25, and the air pressure in the inner cavity of the precision metering drainage box 2 is always balanced with the outside world; then the precision metering drainage box 2 is removed from the upper part of the liquid collecting drainage bag 4, and the height of the precision metering drainage box 2 is increased, so that the box liquid outlet 21 at the bottom of the precision metering drainage box 2 is higher than the bag liquid inlet 41 of the liquid collecting drainage bag 4, and the outside gas enters the cavity of the precision metering drainage box 2 through the temporary air inlet 25, and the drainage liquid in the precision metering drainage box 2 flows into the liquid collecting drainage bag 4 through the box liquid outlet 21, the connecting hose 3 and the bag liquid inlet 41 under the action of gravity, thereby completing the operation of emptying the liquid in the precision metering drainage box 2 into the liquid collecting drainage bag 4.

[0042] After the liquid in the precise metering drainage box 2 is emptied into the liquid collecting drainage bag 4, the precise metering drainage box 2 is restored and fixed to the detachable fixing part on the upper part of the liquid collecting drainage bag 4, and the sealing cap is re-sealed on the temporary air inlet 25 to close the temporary air inlet 25, and the drainage tube 1 and the chest drainage tube ( Figure 4 The Robert clamp is opened in the middle) and continuous drainage treatment can be continued.

[0043] It should be noted that: when the precision metering drainage box 2 is temporarily fixed on the upper part of the liquid collection drainage bag 4, although the bag liquid inlet 41 is lower than the connecting port 22, the height difference between the two is not large, 1-3 cm is the best; similarly, the position of the water-injected breathable membrane at the lower opening of the water-seal exhaust pipe 23 should also not be lower than the positions of the bag liquid inlet 41 and the connecting port 22, so as to avoid the drainage liquid level in the precision metering drainage box 2 rising to reach the lower opening of the water-seal exhaust pipe 23, thereby hindering the discharge of gas in the precision metering drainage box 2.

[0044] In practice, when the precision metering drainage box 2 reaches its maximum capacity, the height of the drainage plane 20 within the box tube of the precision metering drainage box 2 is aligned with the bag inlet 41. The total amount of drainage fluid stored within the precision metering drainage box 2 is largely determined by the height of the bag inlet 41. If the bag inlet 41 is too low, the maximum temporary storage capacity within the precision metering drainage box 2 will also be reduced. Specifically, the volume of the precision metering drainage box 2 from the bottom to the height of the bag inlet 41 represents the effective volume of the precision metering drainage box 2 when fully filled, with an optimal range of 70-150ml.

[0045] When it is necessary to test the instantaneous speed of the drainage fluid, first empty all the liquid in the precision metering drainage box 2 into the liquid collecting drainage bag 4. At this time, the drainage volume in the liquid collecting drainage bag 4 is read as Aml; within a certain period of time (before the precision metering drainage box 2 is full of liquid again), read the volume of liquid entering the precision metering drainage box 2, and the instantaneous drainage speed can be calculated. For example: after the precision metering drainage box 2 is emptied, the liquid volume in the precision metering drainage box 2 is Bml after 5 minutes. During this 5 minutes, the instantaneous drainage speed is 0.2Bml / min; the total drainage volume is A+Bml. After the precision metering drainage box 2 is emptied, the liquid volume in the precision metering drainage box 2 is Cml after 10 minutes. During this 10 minutes, the instantaneous drainage speed is 0.1Cml / min, and the total drainage volume is A+Cml. By observing the instantaneous drainage speed, abnormal bleeding after thoracic surgery can be discovered in time, and secondary surgery can be performed in time to stop bleeding, thereby avoiding serious consequences.

[0046] The detachable fixing positions of the precision metering drainage box 2 and the liquid collecting drainage bag 4 are respectively provided with matching Velcro suede or burr surface, or matching snap-on buckles.

[0047] Specifically, there is no fixed matching requirement for the velvet and bristle surfaces of the Velcro tape at the detachable fixed positions of the precision metering drainage box 2 and the liquid collection drainage bag 4. The velvet and bristle surfaces of the Velcro tape can be interchanged. However, the contact area and adhesion between the velvet and bristle surfaces must be large enough to provide a pressure greater than the weight of the precision metering drainage box 2 when filled with drainage liquid, ensuring that the precision metering drainage box 2 will not fall off the liquid collection drainage bag 4 after being filled with liquid. The precision metering drainage box 2 has a small volume and is light weight, and ordinary Velcro tape on the market can easily meet this requirement.

[0048] The detachable fixing positions of the precision metering drainage box 2 and the liquid collecting drainage bag 4 can also be provided with matching snap fasteners. The snap fasteners include a male snap and a female snap. The protrusion of the male snap can temporarily snap into the recess of the female snap, providing sufficient fixing force for the detachable fixing of the precision metering drainage box 2 and the liquid collecting drainage bag 4. Of course, the snap fasteners are preferably provided in two sets, one set on the left side of the detachable fixing position of the precision metering drainage box 2 and the liquid collecting drainage bag 4, and the other set on the right side, and both are at the same horizontal position.

[0049] like Figure 7 As shown, at least one elastic tube clamp 43 matching the outer diameter of the connecting hose 3 is provided on the outer wall of the liquid collecting and drainage bag 4 at a location corresponding to the connecting hose 3. The at least one elastic tube clamp 43 is preferably provided at the lower end of the connecting hose 3. When the connecting hose 3 is clamped into the elastic tube clamp 43, a certain fixing force is applied to the lower portion of the connecting hose 3 to prevent the connecting hose 3 from buckling or collapsing. The elastic tube clamp 43 also provides a certain supporting and fixing force for the precision metering and drainage box 2, thereby strengthening the temporary fixing of the precision metering and drainage box 2 and the liquid collecting and drainage bag 4.

[0050] The volume of the precise metering drainage box 2 is less than 200 ml, the volume of the liquid collecting drainage bag 4 is 1000-3000 ml, and a switch drain port 42 is provided below the liquid collecting drainage bag 4 .

[0051] In order to accurately test the instant drainage speed, the precision metering drainage box 2 should be longer in height from top to bottom, narrower in width from left to right, and smaller in width from front to back. When a smaller volume of liquid enters the precision metering drainage box 2, the change in the liquid level can be clearly observed, which facilitates the accurate reading of the internal volume of the precision metering drainage box 2. It should be noted that when printing the volume scale on the outer surface of the precision metering drainage box 2, the volume of the liquid entering the connecting hose 3 should be taken into account. The volume of the liquid entering the connecting hose 3 is calculated as the internal volume of the precision metering drainage box 2, and the external volume scale of the precision metering drainage box 2 is printed according to the change in the liquid level in the precision metering drainage box 2 corresponding to the sum of the common liquid volumes of the two. The precision metering drainage box 2 is preferably set to 70-150ml, which can meet the clinical judgment within 5-30 minutes that the drainage fluid speed is too fast and the condition changes that require timely intervention or even surgical treatment.

[0052] When the liquid-collecting drainage bag 4 is nearly full, the liquid in the liquid-collecting drainage bag 4 can be drained by opening the drain port 42, and the drainage treatment can be continued by closing the liquid-collecting drainage bag 4. The volume of the liquid-collecting drainage bag 4 is preferably set to 1500-2000 ml, which can meet the total drainage volume change of 8-24 hours in the clinic, avoid too frequent emptying operations, and avoid excessive liquid in the liquid-collecting drainage bag 4, which is not conducive to the patient's getting out of bed and activities.

[0053] The inner diameter of the drainage tube 1 is 5-12 mm. When draining gas in the chest cavity, it is often accompanied by alveolar rupture. The gas is discharged from the chest cavity through the alveolar rupture. The inner diameter is 5-12 mm, which is large enough to ensure that the gas in the chest cavity can be discharged smoothly.

[0054] A negative pressure change observer 24 is provided at the upper end of the precision metering drainage box 2. The negative pressure change observer 24 includes an elastic bag or an electronic pressure gauge with a deformation limit of 3-8 cmH2O. The function of the negative pressure change observer 24 is to observe the airtightness of the chest drainage treatment and whether the chest drainage tube is unobstructed. Under normal conditions, when the patient exhales, the chest pressure increases, and the gas pressure of the precision metering drainage box 2 connected to it increases synchronously, and the pressure of the negative pressure change observer 24 increases; when the patient inhales, the chest pressure decreases, and the gas pressure of the precision metering drainage box 2 connected to it decreases synchronously, and the pressure of the negative pressure change observer 24 decreases; the normal progress of the chest drainage can be judged by the ups and downs of the pressure of the negative pressure change observer 24.

[0055] If the drainage tube is blocked or open (not sealed), the gas pressure in the precision metering drainage box 2 will no longer change. At this point, the pressure in the negative pressure change observer 24 will no longer change, and the cause of the abnormality must be urgently investigated and addressed. Specifically, if the pressure in the negative pressure change observer 24 remains constant, it can be determined that the drainage tube is blocked. If the pressure in the negative pressure change observer 24 remains constant at 0, which is consistent with atmospheric pressure, it can be determined that the drainage tube is open (leakage at the connection or damage to the pipeline).

[0056] The elastic bladder is configured as a bellows with one side closed. The bellows' deformation threshold is 3-8 cmH2O. The open end of the bellows communicates with the inner cavity of the precision metering drainage box 2. As the negative pressure in the thoracic cavity changes, the bellows contracts and expands along its long axis. The bellows' walls should be relatively thin to allow medical staff to more clearly observe the changes. An inner diameter of 5-20 mm and a length of 5-20 mm are optimal.

[0057] like Figure 5 As shown, it is a schematic structural diagram of the third embodiment of the present invention. An infrared detector and a timer are provided below the bag liquid inlet 41 and adjacent to the annular connecting hose 3. The infrared detector is provided with an infrared emitting device on one side of the connecting hose 3, and an infrared receiving device is provided on the other side of the corresponding connecting hose 3. The timer starts timing when the connecting hose 3 is empty and stops timing when the connecting hose 3 is filled with liquid.

[0058] The infrared detector and timer are used to remind and record the full state of the precise metering drainage box 2: when the drainage treatment begins, turn on the power, and the infrared detector and timer start working; as the drainage progresses, the liquid in the precise metering drainage box 2 gradually increases, and the liquid level in the connecting hose 3 also gradually rises; when the precise metering drainage box 2 is full of liquid, the liquid level in the connecting hose 3 also reaches the position of the infrared detector, and the liquid absorbs part of the infrared light emitted by the infrared emitting device, causing the infrared light received by the infrared receiving device to be significantly weakened. At this time, the timer stops working and alarms; the drainage speed during this period can be accurately obtained based on the amount of liquid in the precise metering drainage box 2 and the drainage time. At this time, the medical staff or family members empty the liquid in the precise metering drainage box 2 into the liquid collecting drainage bag 4, and then the next stage of drainage can be started and the record is restarted.

[0059] Such a cycle can record the changes in drainage speed during the entire drainage process in segments and observe the progress of the drainage condition. A gradual decrease in drainage speed indicates that the condition is improving, and the drainage treatment can be terminated when it decreases to a certain level; if the drainage speed increases abnormally, it is necessary to be alert to the worsening of the condition, and timely intervention and treatment should be carried out to avoid serious complications. For example: the volume of the precise metering drainage box 2 is V, and the time from the start of drainage to the first precise metering drainage box 2 being filled with liquid is t1, then the average drainage speed during this period is V / t1; after emptying, the time for the precise metering drainage box 2 to be filled with liquid again is t2, the average drainage speed of the second drainage section is V / t2, and the total drainage volume is 2V; after emptying again, the time for the precise metering drainage box 2 to be filled with liquid again is t3, the average drainage speed of the third drainage section is V / t3, and the total drainage volume is 3V; and so on. Figure 9 As shown, a drainage curve with V as the volume increase is formed. The change in drainage speed can be clearly judged by the direction of the drainage curve.

[0060] It is necessary to add that: Figure 4 and Figure 8 As shown, the bag liquid inlet 41 is composed of an opening and connecting accessories provided on the upper part of the liquid collection and drainage bag 4. Figure 8 This is a connecting fitting with an L-shaped channel that connects the opening in the liquid collection and drainage bag 4 to the connecting hose 3. One end of the L-shaped channel is a flat structure with a central opening, which surrounds the opening in the liquid collection and drainage bag 4 and is sealed and bonded to the bag 4. The other end of the L-shaped channel is a circular tube structure that mates with the connecting hose 3 for a sealed connection and fixation.

[0061] In summary, the present invention can observe the drainage negative pressure change state through the negative pressure change observer 24 provided on the precision metering drainage box 2; the drainage gas can be discharged unidirectionally and the drainage gas discharge state can be observed through the water seal exhaust pipe 23; the precision metering drainage box 2 can be safely emptied into the liquid collection drainage bag 4 through the temporary air inlet 25 and the detachable structure; through the cooperation of the precision metering drainage box 2 and the liquid collection drainage bag 4, long-term drainage of chest cavity gas and liquid and intuitive observation of the drainage state can be achieved, and the instantaneous speed of liquid drainage and the long-term drainage speed change trend can be observed in a short time. It is lightweight, conforms to the concept of rapid recovery, and is safe and reliable.

[0062] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by persons of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this patent application shall be covered by the claims of this patent application.

Claims

1. Precision chest drainage bag, characterized by: The device comprises a drainage connecting tube (1), a hard precision metering drainage box (2), a connecting hose (3) and a liquid collecting drainage bag (4) which are connected in sequence; the volume of the precision metering drainage box (2) is smaller than that of the liquid collecting drainage bag (4); the upper parts of the adjacent side walls of the precision metering drainage box (2) and the liquid collecting drainage bag (4) are detachably fixed; The precision metering drainage box (2) is provided with a liquid outlet (21) at the lower end, and the upper cover is connected to the inner cavity to provide a water-sealed exhaust pipe (23) and a temporary air inlet (25); the lower end opening of the water-sealed exhaust pipe (23) is provided with a water-blocking and breathable membrane, and an appropriate amount of water-sealed liquid is poured into the water-sealed exhaust pipe (23); the temporary air inlet (25) is provided with a matching cover; A bag liquid inlet (41) is provided on the upper side of the liquid collecting drainage bag (4); the box liquid outlet (21) is lower than the bag liquid inlet (41) and lower than the communication port (22) of the drainage connecting pipe (1) and the lower end opening of the water seal exhaust pipe (23) in the precision metering drainage box (2); and a connecting hose (3) is connected to the box liquid outlet (21) and the bag liquid inlet (41).

2. The precision chest drainage bag according to claim 1, characterized in that: The detachable fixing positions of the precision metering drainage box (2) and the liquid collecting drainage bag (4) are respectively provided with matching Velcro velvet surfaces or bristle surfaces, or matching snap-on buckles.

3. The precision chest drainage bag according to claim 1, characterized in that: At least one elastic tube clamp (43) matching the outer diameter of the connecting hose (3) is provided on the outer wall of the liquid collecting drainage bag (4) at a position corresponding to the connecting hose (3).

4. The precision chest drainage bag according to claim 1, characterized in that: The volume of the precise metering drainage box (2) is less than 200 ml, the volume of the liquid collecting drainage bag (4) is 1000-3000 ml, and a switch drain port (42) is provided below the liquid collecting drainage bag (4).

5. The precision chest drainage bag according to claim 1, characterized in that: The upper opening of the water-sealed exhaust pipe (23) is provided with a sealing cap, and a water-blocking and breathable membrane is provided inside the sealing cap.

6. The precision chest drainage bag according to claim 1, characterized in that: The inner diameter of the drainage tube (1) is 5-12 mm.

7. The precision chest drainage bag according to claim 1, characterized in that: A negative pressure change observer (24) is provided at the upper end of the precision metering drainage box (2), and the negative pressure change observer (24) comprises an elastic bag with a deformation limit value of 3-8 cmH2O or an electronic pressure gauge; the elastic bag is configured as a bellows with one side closed.

8. The precision chest drainage bag according to claim 1, characterized in that: An infrared detector and a timer are provided below the bag liquid inlet (41) and adjacent to the annular connecting hose (3); the infrared detector is provided with an infrared emitting device on one side of the connecting hose (3), and an infrared receiving device is provided on the other side of the corresponding connecting hose (3); the timer starts timing when the connecting hose (3) is empty and stops timing when the connecting hose (3) is filled with liquid.

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