CN111803726A - Automatic controller for thoracic drainage - Google Patents

Abstract

The invention relates to the field of medical instruments and discloses an automatic thoracic drainage control device, which consists of a weighing bracket, a flow velocity adjusting mechanism, a controller and a power supply assembly, wherein the weighing bracket is arranged on the upper part of the thoracic drainage bracket; the weighing bracket is provided with a placement groove for accommodating and clamping the drainage tube and a weighing sensor for weighing; the flow velocity adjusting mechanism comprises a fixed clamping block and a movable clamping block, and can realize the purposes of controlling the on-off of the drainage tube and adjusting the flow velocity of fluid by extruding the drainage tube in the placing groove; the controller can correspondingly control the flow speed adjusting mechanism based on preset drainage parameters and the change state of real-time weight data during drainage; the power supply assembly is used for supplying working current for power consumption elements. This chest drainage automatic control device adopts intelligent design, uses the automatic control that can realize drainage at regular time, ration drainage and constant speed drainage with current conventional drainage subassembly cooperation, has improved the security and the stability of drainage operation, has saved the manpower, has guaranteed the drainage effect, and convenient to use is swift.

Description

Automatic controller for thoracic drainage

The invention is a divisional application of an invention patent application with application number 2018111350223, which is filed on 28.09.2018.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an automatic control device applied to thoracic drainage.

Background

The pleural cavity of a normal person contains 3ml to 15ml of liquid which plays a role of lubrication during respiratory movement, the liquid is continuously formed and absorbed to maintain a dynamic balance, and if the balance is destroyed by pathological changes, the liquid in the pleural cavity is formed too fast or absorbed too slowly, so that pleural effusion, also called hydrothorax clinically, is formed. Pleural effusion is a common disease in clinic, various diseases of the lung such as inflammation, malignant tumor, tuberculosis, fungi and the like can cause the pleural effusion, and extrapulmonary diseases such as heart failure, liver cirrhosis, pericardial effusion, malignant tumor of abdominal cavity, pancreatitis, nephrotic syndrome, malnutrition, chest trauma and the like are common causes of the pleural effusion, when the pleural effusion volume of a patient is large, the lung and the heart are pressed, and the patient feels shortness of breath, chest distress, hypoxemia and even respiratory failure, so the pleural effusion must be fully drained firstly in clinical treatment.

In the drainage process of a large amount of pleural effusion, the clinical parameters such as daily drainage times, each drainage quantity, drainage speed and the like are required according to the state of illness of a case, in actual clinical operation, clinical parameters in the drainage process are usually realized by subjective control of medical staff or family members of patients, the current artificial control mode has certain disadvantages, on one hand, the drainage process is not performed according to the expected mode of doctors because of misunderstanding in oral delivery of medical orders or negligence of operators, discomfort and injury are brought to patients due to improper drainage, even the life of the patients is threatened, on the other hand, the real-time drainage quantity and the drainage speed are usually judged by human observation in the drainage process, the error is large, the drainage effect is difficult to ensure, meanwhile, the current control mode obviously increases the burden of medical staff and family members of patients.

Disclosure of Invention

The technical purpose of the invention is to provide an automatic thoracic drainage control device which adopts an automatic design, can be matched with the existing clinical drainage assembly for use, can automatically control the drainage process according to preset drainage parameters, effectively reduces the labor burden, and effectively improves the accuracy, stability and safety of clinical thoracic drainage.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

an automatic chest drainage control device, comprising:

the weighing type bracket comprises a weighing mechanism with a weight metering function, which is formed by sequentially matching a weighing platform, a weighing sensor and a base up and down, wherein a weighing signal output by the weighing sensor can reflect the weight of an object above the weighing platform; a portal frame is fixed on the base, and the side wall of a cross beam of the portal frame is provided with a placement groove which extends up and down and is used for accommodating and clamping the drainage tube; a suspension device used for suspending the drainage bag and enabling the drainage bag to be positioned below the cross beam is arranged on the weighing platform;

the flow velocity adjusting mechanism consists of a fixed clamping block fixed on the cross beam, a movable clamping block limited by a track on the cross beam and a driving device; the fixed clamping block and the movable clamping block are respectively arranged on two sides of the placement groove and are opposite to each other, the drainage tube passes through the space between the movable clamping block and the fixed clamping block after being placed in the placement groove, and the movable clamping block can move away from and close to the fixed clamping block along the guide rail in a sliding manner, so that the drainage tube can be extruded to different degrees, and the purposes of controlling the on-off of the drainage tube and adjusting the flow rate of fluid are achieved; the driving device is composed of a motor fixed on the cross beam and a lead screw coaxially connected with an output shaft of the motor, and the other end of the lead screw is in threaded fit with a screw hole formed in the movable clamping block, so that the driving device can drive the movable clamping block to generate displacement along the guide rail;

the controller is arranged on the side wall of the cross beam, a setting key, a display screen and a manual key are arranged outside the controller, and the controller can obtain a weighing signal fed back by the weighing sensor in real time and calculate real-time weight data of an object above the weighing platform; presetting drainage parameters for the controller through a setting key, wherein the drainage parameters comprise drainage starting time at each time, effusion weight drained in unit time in each drainage process, namely drainage speed, and effusion weight drained at each time, namely drainage quantity; the controller can regulate and control the starting, stopping and steering of the motor based on preset drainage parameters and the change state of real-time weight data during drainage, so that the movable clamping block and the fixed clamping block correspondingly extrude the drainage tube, and the drainage process is promoted to be carried out according to the preset drainage parameters; the start, stop and steering of the motor can be manually regulated and controlled through a manual key;

and the power supply assembly is arranged on the cross beam or the base, consists of a storage battery and a plurality of voltage transformation modules and is used for providing working current for the weighing sensor, the motor and the controller.

The use method and the working principle of the automatic thoracic drainage control device are as follows: the automatic control device for the chest drainage is placed on the ground or a platform which is lower than the pleural cavity of a patient; communicating the drainage bag, the drainage tube and the pleural cavity of the patient according to a traditional drainage operation mode, ensuring that a small amount of effusion enters the drainage bag, and adjusting a self-contained switch of the drainage tube to a cut-off state; the drainage bag is hung right above the weighing platform through the suspension device, the lower section part of the drainage tube is clamped and fixed in the placing groove, the part of the drainage tube, which is located between the drainage bag and the flow velocity adjusting mechanism, needs to be ensured to be in a curved shape at the moment, the flow velocity adjusting mechanism blocks the tail end of the drainage tube by operating a manual key, the self-provided switch of the drainage tube is adjusted to be in an open state, and the preparation work of effusion drainage is completed at the moment; drainage parameters such as drainage initial time, drainage speed, drainage volume at every turn are preset through setting up the key, and the controller alright according to the drainage parameter of presetting and the real-time weight data change state that continuously acquires during the drainage carry out following control to flow rate adjustment mechanism:

A. according to the preset drainage starting time, starting the motor to run in a corresponding steering mode on time, driving the movable clamping block to be far away from the fixed clamping block, enabling the drainage tube to be in a conduction state, and starting drainage, namely realizing timing drainage;

B. in each drainage process, calculating the weight of the effusion actually drained in unit time, namely the actual drainage speed, according to the change state of real-time weight data in unit time, and when the actual drainage speed is greater than or less than the preset drainage speed, operating a starting motor in a corresponding steering way to drive a movable clamping block to be close to or far away from a fixed clamping block, so that the flow speed of the effusion in the drainage tube is reduced or increased, and the motor stops operating until the actual drainage speed is equal to the preset drainage speed, thereby ensuring that the actual drainage speed in the drainage process is always equal to the preset drainage speed and realizing constant-speed drainage;

C. in every drainage process, according to the change state of real-time weight data, calculate the actual drainage hydrops weight that produces at present and be the actual drainage volume, when treating actual drainage volume equals to predetermineeing the drainage volume, turn to the operation with starter motor according to corresponding, drive movable clamp splice and be close to fixed clamp splice, make the drainage tube be in and block the state, this drainage is ended, realizes quantitative drainage.

This chest drainage automatic control device has following beneficial effect:

the intelligent drainage device is intelligently designed, is clinically matched with the conventional drainage component for use, can control each drainage process according to preset drainage parameters such as drainage starting time, drainage quantity, drainage speed and the like, realizes automatic control of timed drainage, quantitative drainage and constant-speed drainage, greatly lightens the work burden of medical workers because human interference is not needed in drainage, avoids the situation that drainage cannot be carried out according to an expected mode due to negligence or improper operation, improves the safety and stability of pleural effusion drainage operation, and fully ensures the drainage effect; the automatic control device for thoracic drainage controls the drainage quantity and the drainage speed based on the coordination of the sensing device, the controller and the motor, and compared with manual observation and control in the prior art, the automatic control device for thoracic drainage is more accurate, so that the drainage effect is further ensured; meanwhile, the automatic thoracic drainage control device does not need to change a drainage assembly formed by the existing drainage bag and the drainage tube in clinical application, is very convenient to use, can be combined with or detached from the drainage assembly at any time according to clinical requirements, and is very flexible to apply; in addition, the automatic control device for thoracic drainage has the advantages of ingenious structural design, full-range isolation from effusion in the drainage process, capability of being recycled, small and compact size, convenience in operation, accurate measurement and lower cost, and is suitable for popularization and use in medical units.

Drawings

Fig. 1 is a schematic structural view of an automatic thoracic drainage control device in embodiment 1.

Fig. 2 is a schematic diagram showing the matching of the weighing platform, the weighing sensor and the base in embodiment 1.

Fig. 3 is a schematic view of the flow rate adjustment mechanism, the controller, and the cross member according to embodiment 1.

Fig. 4 is a schematic view of the structure of the flow rate adjustment mechanism and its cooperation with the cross member in embodiment 1.

Fig. 5 is a schematic structural view of the automatic thoracic drainage control device, the drainage bag and the drainage tube in embodiment 1 after combination.

FIG. 6 is a schematic view showing a state where the flow rate adjusting mechanism does not squeeze the draft tube in embodiment 1.

FIG. 7 is a schematic view showing a state where the flow rate adjusting mechanism presses the drainage tube to be blocked in embodiment 1.

Fig. 8 is a working principle diagram of the automatic thoracic drainage control device in embodiment 1.

Fig. 9 is a schematic structural view of an automatic thoracic drainage control device in embodiment 2.

Fig. 10 is one of the schematic views of the structure of the flow rate adjusting mechanism and the cross member according to embodiment 3.

Fig. 11 is a second schematic view of the structure of the flow velocity adjusting mechanism and the cross member according to embodiment 3.

FIG. 12 is a schematic structural view of an automatic thoracic drainage control apparatus according to embodiment 4.

In the figure, 1, a base, 2, a weighing platform, 3, a portal frame, 4, a setting key, 5, a controller, 6, a display screen, 7, a manual key, 8, a motor, 9, a track, 10, a movable clamping block, 11, a placement groove, 111, a linear section, 12, a fixed clamping block, 13, a cross beam, 14, a suspension device, 141, a vertical rod, 142, an arc-shaped part, 143, a cross rod, 144, a lower section, 145, an upper section, 146, a pushing spring, 15, a weighing sensor, 16, a lead screw, 17, a convex rib, 18, a drainage bag, 19, a drainage tube, 20, a dragging groove, 21, a dragging seat, 22, a sliding groove, 23, a trigger, 24, a return spring, 25 and a protection cylinder.

Detailed Description

Example 1

Referring to fig. 1-4, the automatic control device for thoracic drainage disclosed in this embodiment comprises a weighing bracket, a flow rate adjusting mechanism, a controller 5 and a power supply assembly;

as shown in fig. 1, 2 and 5, the weighing bracket includes a weighing mechanism with a weight metering function, which is formed by sequentially matching a weighing platform 2, a weighing sensor 15 and a base 1 up and down, wherein a weighing signal output by the weighing sensor 15 can reflect the weight of an object above the weighing platform 2; a portal frame is fixed on the base 1, a cross beam 13 at the upper end of the portal frame is horizontal, and a containing groove 11 which extends up and down and is used for containing and clamping a drainage tube 19 is formed in the side wall of the cross beam 13; a suspension device 14 for suspending the drainage bag 18 and enabling the drainage bag 18 to be positioned below the cross beam 13 is fixed on the weighing platform 2; the specific matching structure of the weighing platform 2, the weighing sensor 15 and the base 1 can be implemented by referring to the structure of the existing electronic scale, specifically, the weighing platform 2 is limited by the base 1 and has a certain up-and-down floating stroke, but the weighing platform and the base are not completely separated, the weighing sensor 15 is arranged between the weighing platform 2 and the base 1, the weighing sensor 15 provides support for the weighing platform 2 in the vertical direction, and a weighing signal output by the weighing sensor 15 changes along with the pressure applied to the weighing platform 2 by the weighing platform;

referring to fig. 3, 4, 6 and 7, the flow rate adjusting mechanism is an actuating mechanism for adjusting the flow rate of accumulated liquid in the drainage tube 19, and is composed of a fixed clamping block 12, a movable clamping block 10 and a driving device, wherein the fixed clamping block 12 is fixed on a cross beam 13, the movable clamping block 10 is limited by a track 9 on the cross beam 13 and can slide in a predetermined stroke, the fixed clamping block 12 and the movable clamping block 10 are respectively arranged at two sides of the placement groove 11 and are opposite to each other, the drainage tube 19 passes between the movable clamping block 10 and the fixed clamping block 12 after being placed in the placement groove 11, and the movable clamping block 10 can slide along the guide rail and can move away from and close to the fixed clamping block 12, so that the drainage tube 19 can be extruded in different degrees, and the purposes of controlling the opening and closing of the drainage tube 19 and adjusting the flow rate of accumulated liquid are achieved; the driving device is composed of a motor 8 fixed on the cross beam 13 and a lead screw 16 coaxially connected with an output shaft of the motor 8, and the other end of the lead screw 16 is in threaded fit with a screw hole formed on the movable clamping block 10, so that the driving device can drive the movable clamping block 10 to generate displacement along the guide rail;

as shown in fig. 3, 6, 7 and 8, the controller 5 is installed on the side wall of the cross beam 13, and a setting key 4, a display screen 6 and a manual key 7 are arranged outside the controller 5, so that the controller 5 can acquire a weighing signal fed back by the weighing sensor 15 in real time and calculate real-time weight data of an object above the weighing platform 2; drainage parameters can be preset for the controller 5 through the setting key 4, and the drainage parameters comprise drainage starting time of each drainage, drainage speed which is the weight of accumulated liquid drained in unit time in each drainage process, and drainage quantity which is the weight of accumulated liquid drained in each drainage process; the controller 5 can regulate and control the starting, stopping and steering of the motor 8 based on preset drainage parameters and the real-time weight data change state during drainage, so that the movable clamping block 10 is displaced in a preset stroke, and the drainage tube 19 is correspondingly extruded by the fixed clamping block 12, and the drainage process is promoted to be carried out according to the preset drainage parameters; the start, stop and steering of the motor 8 can be manually regulated and controlled through a manual key 7; the display screen 6 can display preset drainage parameters and real-time drainage data calculated by the controller 5 according to the weighing signals;

the power supply module is disposed on the beam 13 or the base 1, and is composed of a storage battery and a plurality of voltage transformation modules, and is used for supplying operating current to the weighing sensor 15, the motor 8 and the controller 5.

The use method and the working principle of the automatic thoracic drainage control device are as follows:

according to the traditional drainage operation mode, the drainage bag 18 is communicated with the pleural cavity of the patient through the drainage tube 19, a small amount of effusion enters the drainage bag 18, and the self-contained switch of the drainage tube 19 is adjusted to be in a cut-off state, if the self-contained switch is not arranged on the drainage tube 19, the drainage tube 19 can be in the cut-off state by means of auxiliary devices such as a medical clip and the like; referring to fig. 5, 6 and 7, the automatic thoracic drainage control device is placed on the ground or platform lower than the pleural cavity of a patient, the drainage bag 18 is fixed on the suspension device 14 by means of a hook, a bearing rope or a medical clip, the drainage bag 18 is positioned above the weighing platform 2 and below the cross beam 13, the tail section of the drainage tube 19 is clamped and fixed in the placement groove 11, the part of the drainage tube 19 positioned between the drainage bag 18 and the flow rate adjusting mechanism is required to be bent, the flow rate adjusting mechanism blocks the tail end of the drainage tube 19 by operating the manual key 7, the switch of the drainage tube 19 is adjusted to be in an open state, the preparation work of effusion drainage is completed, and the effusion drainage is not started because the drainage tube 19 is still in the blocking state; referring to fig. 6, 7 and 8, the setting key 4 is used to preset the drainage parameters such as the initial time of each drainage, the drainage speed of each drainage, the drainage quantity of each drainage and the like, and the controller 5 can control the flow rate adjusting mechanism according to the preset drainage parameters and the change state of the real-time weight data continuously acquired during the drainage, as follows:

A. according to the preset drainage starting time, starting the motor 8 to run in a corresponding steering mode on time, driving the movable clamping block 10 to be far away from the fixed clamping block 12, enabling the drainage tube 19 to be in a conduction state, and starting drainage, namely realizing timing drainage;

B. in each drainage process, calculating the weight of the effusion actually drained in unit time, namely the actual drainage speed, according to the change state of real-time weight data in unit time, when the actual drainage speed is greater than or less than the preset drainage speed, operating the starting motor 8 in a corresponding steering way, driving the movable clamping block 10 to be close to or far away from the fixed clamping block 12, so that the flow speed of the effusion in the drainage tube 19 is reduced or increased, and the motor 8 stops operating until the actual drainage speed is equal to the preset drainage speed, thereby ensuring that the actual drainage speed is always equal to the preset drainage speed in the drainage process, namely realizing constant-speed drainage;

C. in each drainage process, calculating the weight of the actual drainage effusion generated at present, namely the actual drainage quantity, according to the change state of the real-time weight data, when the actual drainage quantity is equal to the preset drainage quantity, operating the starting motor 8 in a corresponding steering mode, driving the movable clamping block 10 to be close to the fixed clamping block 12, enabling the drainage tube 19 to be in a blocking state, and finishing the drainage, namely realizing quantitative drainage;

after the whole pleural effusion drainage operation is finished, the manual key 7 is operated to drive the flow speed adjusting mechanism to stop extruding the drainage tube 19, and then the drainage tube 19 can be taken out from the placing groove 11, namely the pleural effusion drainage automatic control device is separated from the drainage component.

In the automatic thoracic drainage control device, the movable clamping block 10 is limited by the track 9 and can slide in a preset stroke, so that the movable clamping block can be far away from and close to the fixed clamping block 12, and the aims of controlling the on-off of the drainage tube 19 and adjusting the flow rate of effusion are fulfilled by squeezing the drainage tube 19 to different degrees; based on the setting purpose of the movable clamping block 10 and the fixed clamping block 12 and the working mode, the preset stroke of the movable clamping block 10 needs to satisfy: a. as shown in fig. 7, the movable clamping block 10 can approach the fixed clamping block 12 to press the drainage tube 19 to a blocking state, in which the effusion in the drainage tube 19 cannot flow and the drainage is in a stop state; b. as shown in FIG. 6, the movable clamping block 10 can be moved away from the fixed clamping block 12 without squeezing the draft tube 19, in which state the maximum drainage speed can be achieved, and in which state the draft tube 19 can be removed from the settling groove 11.

Referring to fig. 1, 5 and 6, in the automatic thoracic drainage control device, a placement groove 11 is used for accommodating and clamping a drainage tube 19; on one hand, external force interference caused by unstable factors such as shaking of the drainage tube 19 is effectively avoided, so that a weighing signal output by the weighing sensor 15 can more stably and accurately reflect the accumulated liquid amount in the drainage bag 18; on the other hand, the drainage tube 19 in the placing groove 11 is more stably matched with the flow velocity adjusting mechanism, and the control effect of the flow velocity adjusting mechanism on the flow velocity adjustment of the accumulated liquid in the drainage tube 19 is ensured; in order to improve the clamping effect of the placing groove 11 on the drainage tube 19, the placing groove 11 may adopt a curved design, that is, the placing groove 11 is curved from top to bottom and at least includes a straight section 111, and the fixed clamping block 12 and the movable clamping block 10 are placed on two sides of the straight section 111.

Referring to fig. 5 and 8, when the automatic thoracic drainage control device is used clinically, based on the combination relationship between the drainage tube 19, the drainage bag 18 and the automatic thoracic drainage control device, the change of the load-bearing signal output by the weighing sensor 15 is mainly caused by the change of the drainage volume of the effusion in the drainage bag 18, after the drainage tube 19 between the drainage bag 18 and the flow rate adjusting mechanism is preset to be in a bent shape, in the drainage process, the acting force indirectly generated by the symmetrical retransmission sensor 15 of the drainage tube 19 hardly changes, so the controller 5 can accurately calculate key data such as actual drainage speed, actual drainage volume and the like according to real-time weight data continuously acquired during drainage, and further can realize automatic and accurate control of the drainage process.

Referring to fig. 1 and 8, in the automatic thoracic drainage control device, a certain signal transmission or working current transmission relationship exists among the controller 5, the motor 8, the weighing sensor 15 and the storage battery, and the corresponding signal transmission and working current transmission can be realized by electrically connecting the two related parts through a line.

Referring to fig. 3 and 4, when the automatic thoracic drainage control device is clinically used, the drainage tube 19 needs to be in a blocking state before and after each effusion drainage process, so that accurate control of each drainage process can be realized, and the blocking state of the drainage tube 19 is realized based on the extrusion of the movable clamping block 10 and the fixed clamping block 12; in order to improve the capability of the movable clamping block 10 and the fixed clamping block 12 for blocking the drainage tube 19 well, at least two convex ribs 17 are respectively arranged on the opposite end surfaces of the fixed clamping block 12 and the movable clamping block 10, the convex ribs 17 on the two end surfaces are opposite to each other one by one, and the drainage tube 19 can be blocked at intervals at multiple points.

Referring to fig. 1, in the automatic thoracic drainage control device, the suspension device 14 is used for providing support for the drainage bag 18, so that the drainage bag 18 is located above the weighing platform 2 and below the gantry beam 13, and the weight of the drainage bag 18 and the accumulated fluid therein is indirectly borne by the weighing platform 2, and for this purpose, the suspension device 14 adopts the prior art and has various implementation structures, such as the following design:

referring to fig. 5, the suspension device 14 is composed of two vertical rods 141 fixed on the upper side of the weighing platform 2, and a cross rod 143 supported by the two vertical rods 141 and located right above the weighing platform 2, wherein the cross rod 143, the two vertical rods 141 and the weighing platform 2 form a rectangular frame-shaped structure with an inner area capable of accommodating the drainage bag 18; the cross bar 143 is used to hang and support the drainage bag 18, and the middle of the cross bar 143 is provided with an arc-shaped portion 142 bent to one side, thereby not constituting an obstacle to the up-and-down extension of the tail portion of the drainage tube 19.

Referring to fig. 5 and 8, the automatic control device for thoracic drainage adopts an intelligent design, can control each drainage process according to preset drainage parameters such as drainage starting time, drainage quantity, drainage speed and the like, realizes automatic drainage, and improves the accuracy, safety and stability of the drainage operation of pleural effusion; in clinical application, a drainage assembly formed by the existing drainage bag 18 and the drainage tube 19 does not need to be changed, the use is very convenient, the drainage bag can be combined with or detached from the drainage assembly at any time according to clinical requirements, and the application is very flexible; meanwhile, in clinical use, the automatic control device for the thoracic drainage is isolated from the hydrops in the whole process, cannot be polluted by the pleural effusion, is safe and sanitary, and can be recycled; in addition, the device has the advantages of ingenious structural design, small size, compactness, convenient operation, accurate measurement and lower cost.

Example 2

Referring to fig. 5, the existing drainage bag 18 is made of soft plastic material and has the characteristic of easy deformation, but when the drainage bag is used in combination with the automatic thoracic drainage control device disclosed in embodiment 1 clinically, the drainage bag is fixed in a top-hanging manner, the weight of the accumulated fluid is borne by the drainage bag 18 in the drainage process, and the pressure in the drainage bag 18 is gradually increased along with the increase of the accumulated fluid in the drainage bag 18, so that the maximum drainage speed which can be realized in the drainage process is uneven before and after, and the flow rate is slow in the middle and later stages of the drainage process, and the drainage efficiency is low; based on the above technical problem, the present embodiment is further improved based on the structure of the automatic thoracic drainage control device disclosed in embodiment 1 as follows:

as shown in fig. 9, the suspension device 14 can be extended and retracted in the vertical direction, and can automatically return to the extended state in a natural state, and the suspension device can correspondingly retract with the increase of the weight of the accumulated liquid in the drainage bag 18, so that the drainage bag 18 moves downward as a whole; the upper side of the base 1 is provided with a dragging and holding seat 21, the upper side of the dragging and holding seat 21 is provided with a dragging and holding groove 20 for accommodating the bottom of the drainage bag 18, and after the drainage bag 18 moves downwards to the bottom of the drainage bag and is located in the dragging and holding groove 20, the dragging and holding seat 21 and the suspension device 14 jointly provide supporting force for the drainage bag 18;

therefore, in the initial stage of drainage, the amount of accumulated liquid in the drainage bag 18 is small, and the pressure in the drainage bag 18 cannot be greatly influenced, and at the moment, the drainage bag 18 is only supported by the suspension support device 14 to form a suspension shape, so that the drainage bag 18 can be fully extended; along with the increase of accumulated liquid in the drainage bag 18, the suspension support device 14 is driven by the gravity of the drainage bag 18 to gradually retract downwards, so that the support seat 21 bears partial gravity of the drainage bag 18, the pressure in the drainage bag 18 tends to be balanced before and after in the drainage process, the achievable maximum drainage speed is uniform, and the defect of slow flow rate in the later stage of drainage is avoided;

in the automatic thoracic drainage control device disclosed in this embodiment, the suspension device 14 can be extended and retracted in a vertical direction, and this technical feature has various embodiments, for example, when the suspension device 14 adopts a structure composed of two vertical rods 141 and a cross rod 143 disclosed in embodiment 1, both the two vertical rods 141 can be designed to be retractable, that is, each vertical rod 141 is formed by inserting and matching an upper section 145 and a lower section 144 and can be axially extended and retracted, a push spring 146 for driving the upper section 145 and the lower section 144 to extend is disposed between the upper section 145 and the lower section 144, and the suspension device 14 can better achieve the above technical effects by adjusting the elastic coefficient of the push spring 146 in the processing process.

Example 3

Referring to fig. 7, in clinical use, after each drainage pause or the whole drainage operation is completed, the drainage tube 19 is squeezed by the flow velocity adjusting mechanism to be in a blocked state, at this time, if the drainage tube 19 is to be separated from the placement groove 11, the manual key 7 is needed to drive the movable clamping block 10 to be away from the fixed clamping block 12, so that the flow velocity adjusting mechanism relieves the squeezing effect on the drainage tube 19, but if any one of the manual key 7, the controller 5 and the power supply fails, the movable clamping block 10 cannot move in an expected manner, so that the drainage tube 19 cannot be smoothly separated from the placement groove 11;

in view of the above-mentioned disadvantages, the present embodiment is further improved based on the structure of the automatic control device for thoracic drainage disclosed in the previous embodiment as follows:

as shown in fig. 10 and 11, the fixed clamping block 12 is limited by a sliding slot 22 formed on the cross beam 13 to have a movable stroke, and the cross beam 13 is provided with a return spring 24 for returning the fixed clamping block 12 to the stroke starting end; when the fixed clamping block 12 is positioned at the initial end of the stroke, the position of the fixed clamping block and the thrust provided by the return spring 24 can ensure that the fixed clamping block and the movable clamping block 10 are matched to have the capabilities of controlling the on-off of the drainage tube 19 and adjusting the flow rate of fluid in the drainage tube; when the fixed clamping block 12 is positioned at the end of the stroke, it is far away from the placing groove 11 and can not be matched with the movable clamping block 10 to extrude the drainage tube 19; the outer side walls of the fixed clamping block 12 and the cross beam 13 are respectively provided with a trigger 23 protruding outwards;

therefore, when the drainage tube 19 is to be separated from or clamped into the placement groove 11, the two triggers 23 are manually driven to close, so that the fixed clamping block 12 can move away from the movable clamping block 10, the flow rate adjusting mechanism releases the extrusion on the drainage tube 19, and then the drainage tube 19 and the placement groove 11 can be correspondingly operated.

Example 4

Referring to fig. 5, in order to reduce the contamination of leaked liquid, considering that liquid leakage often occurs during drainage, such as the connection between the drainage tube 19 and the drainage bag 18 is not tightly sealed, or the drainage bag 18 is broken by external force, the present embodiment is further improved based on the structure of the automatic thoracic drainage control device disclosed in the foregoing embodiment as follows:

referring to fig. 12, a protective cylinder 25 which can be combined with the weighing platform 2 and only has an open upper end is arranged on the weighing platform 2, and after the drainage bag 18 is combined with the suspension device 14, the middle lower part of the drainage bag 18 extends into the protective cylinder 25;

therefore, if leakage occurs, leaked accumulated liquid can be concentrated in the protective cylinder 25, continuous expansion of pollution is avoided, the protective cylinder 25 can be taken down, and the treatment modes of disinfection, cleaning and the like are flexible and convenient.

Claims (9)

1. An automatic control device for thoracic drainage, which is characterized in that it comprises:

the weighing type bracket comprises a weighing mechanism with a weight metering function, which is formed by sequentially matching a weighing platform, a weighing sensor and a base up and down, wherein a weighing signal output by the weighing sensor can reflect the weight of an object above the weighing platform; a portal frame is fixed on the base, and the side wall of a cross beam of the portal frame is provided with a placement groove which extends up and down and is used for accommodating and clamping the drainage tube; a suspension device used for suspending the drainage bag and enabling the drainage bag to be positioned below the cross beam is arranged on the weighing platform; the suspension device is composed of two vertical rods fixed on the upper side of the weighing platform and a cross rod supported by the two vertical rods and positioned right above the weighing platform, and the cross rod, the two vertical rods and the weighing platform form a rectangular frame-shaped structure of which the inner area can contain the drainage bag; the cross bar is used for hanging and supporting the drainage bag, and the middle part of the cross bar is provided with an arc part bent to one side, so that the upper and lower extension of the lower section part of the drainage tube is not hindered;

the flow velocity adjusting mechanism consists of a fixed clamping block fixed on the cross beam, a movable clamping block limited by a track on the cross beam and a driving device; the fixed clamping block and the movable clamping block are respectively arranged on two sides of the placement groove and are opposite to each other, the drainage tube passes through the space between the movable clamping block and the fixed clamping block after being placed in the placement groove, and the movable clamping block can move away from and close to the fixed clamping block along the guide rail in a sliding manner, so that the drainage tube can be extruded to different degrees, and the purposes of controlling the on-off of the drainage tube and adjusting the flow rate of fluid are achieved; the driving device is composed of a motor fixed on the cross beam and a lead screw coaxially connected with an output shaft of the motor, and the other end of the lead screw is in threaded fit with a screw hole formed in the movable clamping block, so that the driving device can drive the movable clamping block to generate displacement along the guide rail;

the controller is arranged on the side wall of the cross beam, a setting key, a display screen and a manual key are arranged outside the controller, and the controller can obtain a weighing signal fed back by the weighing sensor in real time and calculate real-time weight data of an object above the weighing platform; the drainage parameters can be preset for the controller through a setting key, and the drainage parameters comprise drainage starting time at each time, effusion weight drained in unit time in each drainage process, namely drainage speed, and effusion weight drained at each time, namely drainage quantity; the controller can regulate and control the starting, stopping and steering of the motor based on preset drainage parameters and the change state of real-time weight data during drainage, so that the movable clamping block and the fixed clamping block correspondingly extrude the drainage tube, and the drainage process is promoted to be carried out according to the preset drainage parameters; the start, stop and steering of the motor can be manually regulated and controlled through a manual key;

and the power supply assembly is arranged on the cross beam or the base, consists of a storage battery and a plurality of voltage transformation modules and is used for providing working current for the weighing sensor, the motor and the controller.

2. The automatic control device for thoracic drainage according to claim 1, wherein: the suspension device can be stretched in the vertical direction and can automatically reset to a stretching state in a natural state, and the suspension device can correspondingly retract along with the increase of liquid in the drainage bag so as to enable the drainage bag to integrally move downwards; the base upside be equipped with one and drag the seat, drag the seat upside and open and to have the groove of holding that is used for holding drainage bag bottom, after drainage bag downwardly moving to its bottom is located in dragging the groove, drag the seat and the suspension device will provide the holding power for drainage bag jointly.

3. The automatic control device for thoracic drainage according to claim 1, wherein: the controller can continuously obtain real-time weight data change state to the velocity of flow adjustment mechanism according to preset drainage parameters and drainage period and control as follows:

A. according to the preset drainage starting time, starting the motor to run in a corresponding steering mode on time, driving the movable clamping block to be far away from the fixed clamping block, enabling the drainage tube to be in a conduction state, starting drainage and realizing timing drainage;

B. in each drainage process, calculating the weight of the effusion actually drained in unit time, namely the actual drainage speed, according to the change state of real-time weight data in unit time, and when the actual drainage speed is greater than or less than the preset drainage speed, operating a starting motor in a corresponding steering way to drive a movable clamping block to be close to or far away from a fixed clamping block, so that the flow speed of the effusion in the drainage tube is reduced or increased, and the motor stops operating until the actual drainage speed is equal to the preset drainage speed, thereby ensuring that the actual drainage speed in the drainage process is always equal to the preset drainage speed and realizing constant-speed drainage;

C. in every drainage process, according to the change state of real-time weight data, calculate the actual drainage hydrops weight that produces at present and be the actual drainage volume, when treating actual drainage volume equals to predetermineeing the drainage volume, turn to the operation with starter motor according to corresponding, drive movable clamp splice and be close to fixed clamp splice, make the drainage tube be in and block the state, this drainage is ended, realizes quantitative drainage.

4. The automatic control device for thoracic drainage according to claim 1, wherein: the placing groove is integrally curved from top to bottom and at least comprises a linear section, and the fixed clamping block and the movable clamping block are arranged on two sides of the linear section.

5. The automatic control device for thoracic drainage according to claim 1, wherein: the opposite end surfaces of the fixed clamping block and the movable clamping block are respectively provided with at least two convex ribs, the convex ribs on the two end surfaces are opposite one to another, and the drainage tube can be blocked at intervals at multiple points.

6. The automatic control device for thoracic drainage according to claim 1, wherein: the drainage bag is combined with the suspension support device, and the middle lower part of the drainage bag extends into the protection cylinder.

7. The automatic control device for thoracic drainage according to claim 1, wherein: the two vertical rods are both designed in a telescopic manner, namely each vertical rod is formed by splicing and matching an upper section and a lower section and can axially extend and retract, and a pushing spring for driving the upper section and the lower section to extend is arranged between the upper section and the lower section.

8. The automatic control device for thoracic drainage according to claim 1, wherein: the weighing platform is limited by the base and has a certain up-and-down floating stroke, but the weighing platform and the base cannot be completely separated, the weighing sensor is arranged between the weighing platform and the base, the weighing sensor provides support for the weighing platform in the vertical direction, and a weighing signal output by the weighing sensor changes along with the pressure applied by the weighing platform to the weighing platform.

9. The automatic control device for thoracic drainage according to claim 1, wherein: the controller, the motor, the weighing sensor and the storage battery are mutually embedded in the portal frame through lines.

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