Portable blood circulation supporting device for fractured limb in vitro

Abstract

A portable blood circulation supporting device for separated fractured limbs comprises a portable box, a display screen and operation keys are fixed to the portable box, a constant-temperature refrigerating chamber is formed in one side of an operation panel, and a PTC refrigerating sheet is fixed to the bottom of the constant-temperature refrigerating chamber; an oxygen tank, a blood circulating pump, a blood oxygen exchanger, an unpowered injector and a container are fixed in the portable box, and the container is filled with lavage fluid; one side of the blood circulation pump is connected with a vein connecting pipe, the blood circulation pump is connected with the blood exchanger, the oxygen tank is connected with the blood exchanger, the blood exchanger is connected with the unpowered injector, the container is connected with the unpowered injector through a guide pipe, and the end of the unpowered injector is connected with an artery connecting pipe. The device is higher in integration level, and has the functions of blood circulation supporting, blood oxygenation supporting and constant-temperature adjusting at the same time; the device can pump lavage fluid into the blood circulation pipeline without power, and the structure of the system and the consumption of energy are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a portable blood circulation support device after limb amputation. Background Technology

[0002] Following limb amputation injuries from various causes, if the ischemic period of the severed limb is prolonged, cells undergo degeneration and necrosis due to hypoxia and other factors, eventually leading to irreversible degeneration. Even if blood vessels are reconnected and blood flow restored, the severed limb not only cannot survive but may also cause poisoning or even death due to the absorption of large amounts of metabolic products and toxins. Current limb irrigation techniques can only remove toxic substances and clear blood vessels from the severed limb; they cannot effectively prevent further tissue necrosis, nor can they provide the necessary oxygen and nutrients to the tissue, and can only keep the severed limb alive for a very limited time.

[0003] To address the aforementioned technical problems, utility model application number 200820113333.5 discloses a foster care device for severed limbs and fingers, comprising a container filled with irrigation fluid, the liquid output end of the irrigation fluid container being connected via a pipe to a blood pump for providing power for the irrigation fluid, the liquid output end of the blood pump being connected via a pipe to an artificial lung for providing blood and gas exchange and carrying oxygen; the liquid output end of the artificial lung being connected via a pipe to the artery of the severed limb or finger, and the severed limb or finger being placed in a sealed thermostat.

[0004] The aforementioned device uses a blood pump to extract blood from the severed limb, then uses an artificial lung to oxygenate the blood, and finally places it in a thermostat for constant temperature preservation. While this device solves the oxygen supply problem during the transport and preservation of the severed limb and effectively prevents necrosis caused by ischemia, it still has the following problems: 1. The device has a low level of integration. The blood circulation system, composed of the artificial lung and artificial kidney, is an independent mechanism from the thermostat, requiring independent operation, which undoubtedly increases the complexity and difficulty of operation. At the same time, the device has a low level of intelligence and cannot uniformly regulate the working status of each subsystem through a central control mechanism; 2. The device requires additional perfusion power to inject the perfusion fluid (anticoagulant and / or nutrients) from the container into the blood circulation channel to prevent blood coagulation and nutrient loss. Utility Model Content

[0005] To address the aforementioned issues, this invention provides a portable blood circulation support device after limb amputation. This device boasts higher integration, simultaneously providing blood circulation support, blood oxygenation support, and constant temperature regulation functions. It also exhibits greater intelligence, as a single central control mechanism can manage oxygen supply, blood circulation, and refrigeration temperature. Furthermore, the device can pump irrigation fluid into the blood circulation tubing without power, reducing system complexity and energy consumption.

[0006] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution:

[0007] A portable blood circulation support device after limb amputation includes a carrying case. An operation panel is fixed on the left side of the carrying case. A display screen is fixed on the operation panel. Operation buttons are fixed below the display screen. A constant temperature refrigerator is opened on one side of the operation panel. A sealing cover is provided on the constant temperature refrigerator. A PTC cooling chip is fixed at the bottom of the constant temperature refrigerator.

[0008] Below the control panel are an equipment slot and a control slot. The equipment slot contains an oxygen tank, a blood circulation pump, a blood oxygen exchanger, a non-powered injector, and a container. The container is filled with irrigation fluid. One side of the blood circulation pump is connected to a venous connection tube, and the other side of the blood circulation pump is connected to the blood exchanger via a conduit. The oxygen tank is connected to the blood exchanger via a conduit, the blood exchanger is connected to the non-powered injector via a conduit, the container is connected to the non-powered injector via a conduit, and the end of the non-powered injector is connected to an arterial connection tube.

[0009] The control slot contains a battery and a circuit control board. The operation buttons, PTC cooling chip, blood circulation pump, and battery are all connected to the circuit control board.

[0010] Furthermore, the irrigation fluid is an anticoagulant and / or a nutrient.

[0011] Furthermore, a solenoid valve is fixed to the conduit of the oxygen cylinder and the blood oxygen exchanger, and the solenoid valve is connected to the circuit control board.

[0012] Furthermore, the blood exchanger includes an upper cover plate, a cylindrical body, an oxygenation core, and a lower cover plate. The upper and lower cover plates encapsulate the oxygenation core within the cylindrical body. The oxygenation core is composed of several hollow fiber membrane bundles and a waterproof and breathable membrane wrapped around the outside of the hollow limiting membrane bundles.

[0013] Furthermore, the non-powered injector includes a non-powered cylinder, one end of which is provided with an inlet port and the other end with an outlet port. A flushing fluid injection connector is provided on one side of the non-powered cylinder. The non-powered cylinder has a through inlet channel, a contraction channel, a throat channel, and an expansion channel. The inlet port is connected to the inlet channel, the outlet port is connected to the expansion channel, and the flushing fluid injection connector is connected to the throat channel.

[0014] Furthermore, the circuit control board is fixedly equipped with a control chip, a power module, a digital-to-analog converter module, a first micro relay, a second micro relay, and a third micro relay. The battery is connected to the control chip through the power module, the control chip is connected to the digital-to-analog converter module, the digital-to-analog converter module is connected to the first micro relay, the second micro relay, and the third micro relay respectively, the PTC cooling chip is connected to the first micro relay, the solenoid valve is connected to the second micro relay, and the blood circulation pump is connected to the third micro relay.

[0015] The beneficial effects of this invention are as follows: the device has a higher degree of integration and simultaneously possesses functions of blood circulation support, blood oxygenation support, and constant temperature regulation; it has a higher degree of intelligence, as the working status of oxygen supply, blood circulation, and refrigeration temperature can be controlled through a single overall control mechanism; the device's non-powered injector utilizes the Venturi effect to draw the rinsing fluid in the container into the blood circulation pipeline without power, reducing the system's structural and energy consumption. Attached Figure Description

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the external structure of a portable blood circulation support device after limb amputation.

[0018] Figure 2 This is a schematic diagram of the internal structure of a portable blood circulation support device after limb amputation.

[0019] Figure 3 This is a schematic diagram of the blood exchanger.

[0020] Figure 4 This is a schematic cross-sectional view of the unpowered injector.

[0021] Figure 5 This is a schematic diagram of the circuit control board.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1-Portable case, 2-Display screen, 3-Operation buttons, 4-Sealed lid, 5-Constant temperature refrigerator, 6-Equipment slot, 7-Control slot, 8-Blood circulation pump, 9-Oxygen cylinder, 10-Blood oxygen exchanger, 11-Non-powered injector, 12-Battery, 13-Circuit control board, 14-Container, 15-Solenoid valve, 16-Amputated limb, 101-Top cover, 102-Waterproof and breathable membrane, 103-Hollow fiber membrane bundle, 104-Cylindrical body 105-Lower cover plate, 106-Oxygen inlet connector, 107-Oxygen outlet, 111-Inflow interface, 112-Outflow interface, 113-Irrigation fluid injection connector, 114-Inlet channel, 115-Throat channel, 116-Expansion channel, 131-Control chip, 132-Power module, 133-Digital-to-analog converter module, 134-First micro relay, 135-Second micro relay, 136-Third micro relay. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-2 As shown, a portable blood circulation support device after limb amputation includes a carrying case 1. An operation panel is fixed on the left side of the carrying case. A display screen 2 is fixed on the operation panel. Operation buttons 3 are fixed below the display screen 2. A constant temperature refrigerator 5 is opened on one side of the operation panel. A sealing cover 4 is provided on the constant temperature refrigerator 5. A PTC cooling chip (not shown in the figure) is fixed at the bottom of the constant temperature refrigerator.

[0026] The operation buttons 3 include a power button, a blood circulation pump power button, an oxygen supply power button, and a temperature adjustment button;

[0027] Below the control panel are an equipment slot 6 and a control slot 7. The equipment slot contains an oxygen tank 9, a blood circulation pump 8, a blood oxygen exchanger 10, a non-powered injector 11, and a container 14. The container 14 is filled with irrigation fluid, which is an anticoagulant and / or nutrients. One side of the blood circulation pump 8 is connected to a venous connection tube, and the other side of the blood circulation pump 8 is connected to the blood exchanger 10 through a conduit. The oxygen tank 9 is connected to the blood exchanger 10 through a conduit. A solenoid valve 15 is fixed on the conduit between the oxygen tank 9 and the blood oxygen exchanger 10. The blood exchanger 10 is connected to the non-powered injector 11 through a conduit. The container 14 is connected to the non-powered injector 11 through a conduit. An arterial connection tube is connected to the end of the non-powered injector 11.

[0028] The control slot 7 is equipped with a storage battery 12 and a circuit control board 13. The operation buttons, PTC cooling chip, solenoid valve, blood circulation pump and storage battery are all connected to the circuit control board.

[0029] like Figure 3 As shown, the blood exchanger includes an upper cover plate 101, a cylindrical body 104, an oxygenation core, and a lower cover plate 105. The upper cover plate 101 and the lower cover plate 105 encapsulate the oxygenation core within the cylindrical body. A conduit connector is fixed to the upper cover plate 101 and the lower cover plate 105. An oxygen inlet connector 106 is located on the upper side of one side of the cylindrical body 104, and an oxygen outlet 107 is located on the lower side of the other side of the cylindrical body. The oxygenation core consists of several hollow fiber membrane bundles 103 and a waterproof and breathable membrane 102 wrapped around the hollow limiting membrane bundles. The hollow fiber bundles allow for the mutual permeation of blood and oxygen, while the waterproof and breathable membrane 102 allows for the free flow of oxygen and prevents blood from flowing out. To prevent blood from flowing out of the oxygen outlet, both ends of the waterproof and breathable membrane 102 of the oxygenation core should extend beyond the oxygen inlet connector 106 and the oxygen outlet 107, respectively, and abut against the upper and lower cover plates.

[0030] like Figure 4 As shown, the non-powered injector includes a non-powered cylinder. One end of the non-powered cylinder has an inlet port 111 and the other end has an outlet port 112. One side of the non-powered cylinder has an irrigation fluid injection connector 113. The non-powered cylinder has a through inlet channel 114, a constriction channel, a throat channel 115, and an expansion channel 116. The inlet port is connected to the inlet channel, the outlet port is connected to the expansion channel, and the irrigation fluid injection connector is connected to the throat channel. When blood flows through the inlet channel 114, through the constriction channel, and the throat channel 115, the flow area of ​​the blood flow suddenly decreases, the blood flow velocity will increase, and a negative pressure will be generated in the throat channel 115. The negative pressure can guide the irrigation fluid in the connected container to be drawn into it. The Venturi effect is used to achieve the purpose of non-powered suction of irrigation fluid, reducing the use of power equipment and thus saving space and energy.

[0031] like Figure 5 As shown, the circuit control board 13 is fixed with a control chip 131, a power module 132, a digital-to-analog converter module 133, a first micro relay 134, a second micro relay 135, and a third micro relay 136. The battery is connected to the control chip through the power module, the control chip is connected to the digital-to-analog converter module, the digital-to-analog converter module is connected to the first micro relay, the second micro relay, and the third micro relay, respectively, the PTC cooling chip is connected to the first micro relay, the solenoid valve is connected to the second micro relay, and the blood circulation pump is connected to the third micro relay.

[0032] In this embodiment, the control chip is a 51 series microcontroller, the power supply module is an AMS1117-3.3V power chip, the digital-to-analog converter module is a DAC0852 digital-to-analog converter chip, and the first, second, and third micro relays are all g5v-2 type micro relays.

[0033] A specific application of this device is as follows: The patient's severed limb 16 is placed in the constant-temperature cold storage chamber 5. The veins and arteries of the severed limb are connected to the venous connection tube and arterial connection tube, respectively. The power switch on operation button 3 is pressed, and the entire device enters the working state. The blood circulation pump switch and oxygen supply switch are pressed, and the temperature in the constant-temperature cold storage chamber 5 is set using the temperature adjustment button. After the oxygen supply switch is turned on, the solenoid valve 15 opens, and oxygen enters the oxygen exchanger 10 through the oxygen tank 9. The blood circulation pump 8 draws venous blood from the severed limb 16 and pumps it into the oxygen exchanger 10. The blood then enters the oxygenation core, while the oxygen in the oxygen tank 9 also enters the oxygen exchanger 10. Oxygen entering the system diffuses through the waterproof and breathable membrane 12 into the hollow fiber membrane bundle. The oxygen diffused in the oxygenation core combines with hemoglobin in the blood, thereby providing oxygen to the blood. After the blood is fully oxygenated, it enters the non-powered injector 11. During the flow of blood through the non-powered injector 11, a negative pressure is generated at the throat passage, drawing the irrigation fluid in the container 14 into it. The anticoagulant and / or nutrients in the irrigation fluid enter the non-powered injector 11 and mix into the blood, thereby preventing blood clotting or providing nutrients to the blood. During the blood circulation process, oxygen and irrigation fluid are provided to the blood, achieving the purpose of prolonging the preservation of the amputated limb.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A portable blood circulation support device after limb amputation, comprising a carrying case, an operation panel fixed to the left side of the carrying case, a display screen fixed to the operation panel, and operation buttons fixed below the display screen, characterized in that... A constant temperature refrigerator compartment is provided on one side of the control panel. The constant temperature refrigerator compartment is equipped with a sealing cover. A PTC cooling chip is fixed at the bottom of the constant temperature refrigerator compartment. Below the control panel are an equipment slot and a control slot. The equipment slot contains an oxygen tank, a blood circulation pump, a blood oxygen exchanger, a non-powered injector, and a container. The container is filled with irrigation fluid. One side of the blood circulation pump is connected to a venous connection tube, and the other side of the blood circulation pump is connected to the blood exchanger via a conduit. The oxygen tank is connected to the blood exchanger via a conduit, the blood exchanger is connected to the non-powered injector via a conduit, the container is connected to the non-powered injector via a conduit, and the end of the non-powered injector is connected to an arterial connection tube. The control slot contains a battery and a circuit control board. The operation buttons, PTC cooling chip, blood circulation pump, and battery are all connected to the circuit control board.

2. The portable blood circulation support device after limb amputation according to claim 1, characterized in that, The irrigation fluid is an anticoagulant and / or a nutrient.

3. The portable blood circulation support device after limb amputation according to claim 1, characterized in that, A solenoid valve is fixed to the conduit of the oxygen cylinder and the blood oxygen exchanger, and the solenoid valve is connected to the circuit control board.

4. A portable blood circulation support device after limb amputation according to claim 1, characterized in that, The blood exchanger includes an upper cover plate, a cylindrical body, an oxygenation core, and a lower cover plate. The upper and lower cover plates encapsulate the oxygenation core within the cylindrical body. The oxygenation core consists of several hollow fiber membrane bundles and a waterproof and breathable membrane wrapped around the outside of the hollow limiting membrane bundles.

5. A portable blood circulation support device after limb amputation according to claim 1, characterized in that, The non-powered injector includes a non-powered cylinder, one end of which has an inlet port and the other end has an outlet port. A flushing fluid injection connector is provided on one side of the non-powered cylinder. The non-powered cylinder has a through inlet channel, a contraction channel, a throat channel, and an expansion channel. The inlet port is connected to the inlet channel, the outlet port is connected to the expansion channel, and the flushing fluid injection connector is connected to the throat channel.

6. A portable blood circulation support device after limb amputation according to claim 3, characterized in that, The circuit control board is fixed with a control chip, a power module, a digital-to-analog converter module, a first micro relay, a second micro relay, and a third micro relay. The battery is connected to the control chip through the power module, the control chip is connected to the digital-to-analog converter module, the digital-to-analog converter module is connected to the first micro relay, the second micro relay, and the third micro relay, respectively, the PTC cooling chip is connected to the first micro relay, the solenoid valve is connected to the second micro relay, and the blood circulation pump is connected to the third micro relay.

Images