Digitized real-time temperature control severed finger constant temperature device

Abstract

This invention relates to the field of postoperative care for finger replantation and discloses a digitally controlled real-time temperature-regulating device for replanted fingers. The device includes a housing and a lid hinged to the housing. The front of the housing has an arc-shaped entrance for the patient's arm to enter, and a partition is fixedly connected to the bottom of the inner cavity of the housing. This digitally controlled real-time temperature-regulating device generates a vertically uniform laminar flow of hot air through an aerodynamic laminar flow heat exchange mechanism, avoiding the localized overheating problem of traditional radiant heating. A flexible, conformal microcirculation pulsation mechanism actively promotes blood return and microcirculation perfusion by pulsating and squeezing the replanted finger at a simulated human heart rate frequency. A multimodal tissue activity monitoring mechanism captures the temperature distribution, blood flow velocity, and blood oxygenation data of the replanted finger in real time. The central controller dynamically adjusts the heating power and pulsation frequency based on the monitoring data, forming a closed-loop control of "monitoring-feedback-adjustment," significantly improving the prevention of vascular crises.

Description

Technical Field

[0001] This invention relates to the field of postoperative care for finger replantation, specifically a digital real-time temperature-controlled device for maintaining the temperature of a severed finger. Background Technology

[0002] After finger replantation surgery, the anastomosed blood vessels are highly susceptible to spasm or embolism due to cold stimulation. Therefore, maintaining local temperature after surgery is crucial to ensuring the survival of the replanted finger. Currently, clinical practice mainly uses methods such as ordinary heat lamp irradiation or simple electric blanket wrapping for warmth. Some medical institutions have also begun to use incubators to provide a closed, warm environment for the severed finger.

[0003] However, existing technologies have the following shortcomings: First, traditional heating lamps or heating plates primarily rely on thermal radiation for heat transfer, which can easily lead to uneven local heating and poor temperature control precision, posing a risk of burns or vascular crises due to temperature fluctuations. Second, existing thermostatic devices have limited functionality, only maintaining ambient temperature and unable to dynamically adjust based on the actual tissue activity status of the severed finger (such as blood flow velocity and metabolic status), let alone actively improve local microcirculation. Third, heating methods are mostly static air convection, and the turbulent airflow results in poor wound dryness for patients, and the lack of real-time quantitative monitoring of patient comfort and tissue activity parameters prevents medical staff from obtaining timely information on the true recovery status of the severed finger.

[0004] To address the aforementioned issues, we have made improvements by proposing a digitally controlled, real-time temperature-regulating device for maintaining the temperature of a severed finger. Summary of the Invention

[0005] The purpose of this invention is to provide a digital real-time temperature-controlled finger-severing thermostat to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A digitally controlled real-time temperature-regulating device for maintaining the temperature of a severed finger includes a housing and a lid hinged to the housing. The front end of the housing has an arc-shaped entrance for the patient's arm to enter. A partition is fixedly connected to the bottom of the inner cavity of the housing. The device also includes: An aerodynamic laminar flow heat exchange mechanism is located at the rear of the housing and is used to generate a vertical laminar flow of hot air. A flexible, conforming microcirculation pulsation mechanism is located at the bottom of the housing to conform to the patient's palm and apply periodic pulsating pressure to the severed finger area. A multimodal tissue activity monitoring mechanism is located inside the box cover and is used for non-invasive monitoring of blood flow, temperature and metabolic status of the severed finger; The central controller is electrically connected to the aerodynamic laminar flow heat exchange mechanism, the flexible fitting microcirculation pulsation mechanism, and the multimodal tissue activity monitoring mechanism, respectively, and synchronously adjusts the heat exchange power and pulsation frequency according to the feedback data from the multimodal tissue activity monitoring mechanism.

[0007] As a further embodiment of the present invention: the aerodynamic laminar flow heat exchange mechanism includes a heat exchange box, a semiconductor cooling chip, heat dissipation fins, a mounting plate, a miniature silent fan, and a honeycomb rectifier plate. An L-shaped air duct is formed on the front side of the heat exchange box, and a guide plate is connected to the top of the front surface of the heat exchange box. An optical window through-hole is embedded in the middle of the inner surface of the honeycomb rectifier plate, and the optical window through-hole is vertically arranged below the multimodal tissue activity monitoring mechanism. The miniature silent fan blows the air regulated by the semiconductor cooling chip toward the honeycomb rectifier plate to form a vertically downward laminar airflow with uniform velocity.

[0008] As a further embodiment of the present invention: the flexible fitting microcirculation pulsation mechanism includes an airbag, a micro air pump and an electromagnetic pressure relief valve; the upper surface of the airbag is provided with a finger groove that matches the shape of a finger, and the micro air pump is driven by a central controller to inflate and deflate the airbag to achieve pulsating compression that simulates the human heartbeat frequency.

[0009] As a further aspect of the present invention: the airbag cushion is made of medical-grade silicone and has multiple independent air chambers inside. Each independent air chamber is connected to a micro air pump through a connecting hose to achieve differentiated pulsating massage for different finger parts.

[0010] As a further embodiment of the present invention: the multimodal tissue activity monitoring mechanism includes an infrared thermal imaging sensor, a Doppler blood flow probe, and a blood oxygen saturation probe; the infrared thermal imaging sensor is used to acquire a two-dimensional temperature distribution image of the severed finger area.

[0011] As a further aspect of the present invention: the central controller includes a PID control module and a pulse synchronization module; the PID control module adjusts the power of the semiconductor cooling chip in real time according to the temperature data of the multimodal tissue activity monitoring mechanism; the pulse synchronization module controls the micro air pump to keep the pulse frequency in sync with or in an integer multiple of the patient's heart rate according to the blood flow velocity waveform detected by the Doppler blood flow probe.

[0012] As a further embodiment of the present invention: the box body and the box cover are made of double-layer transparent polycarbonate material, with vacuum insulation board filling the interlayer.

[0013] As a further aspect of the present invention, it also includes a touch screen display located on the outside of the housing. The touch screen display is connected to the central controller and is used to display the temperature distribution image and blood flow velocity data of the severed finger in real time, and to receive user operation commands.

[0014] As a further aspect of the present invention: a flexible sealing silicone ring and a pressure sensor are provided at the arc-shaped entrance. The pressure sensor is used to detect the contact pressure between the patient's arm and the flexible sealing silicone ring. When the pressure exceeds a preset threshold, an alarm signal is sent to the central controller. A battery is fixedly connected to the bottom of the inner cavity of the box and to the left side of the bottom of the partition. A charging hole is provided at the bottom of the left side of the box.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention generates a vertically uniform laminar heat exchanger through an aerodynamic laminar flow heat exchange mechanism, avoiding the localized overheating problem of traditional radiant heating; a flexible, conforming microcirculation pulsation mechanism actively promotes blood return and microcirculation perfusion by pulsatingly squeezing the severed finger using a simulated human heart rate frequency; and a multimodal tissue activity monitoring mechanism captures the temperature distribution, blood flow velocity, and blood oxygenation data of the severed finger in real time. The central controller dynamically adjusts the heating power and pulsation frequency based on the monitoring data, forming a closed-loop control of "monitoring-feedback-adjustment," which significantly improves the prevention effect of vascular crisis.

[0016] 2. This invention combines physical thermotherapy with mechanical stimulation, overcoming the limitations of existing devices that only provide warmth. The pulsation mechanism, synchronized with heart rate, utilizes bioresonance to enhance blood flow drive, effectively reducing postoperative edema. Simultaneously, an infrared thermal imaging sensor replaces single-point temperature measurement, enabling comprehensive monitoring of temperature differences across different areas of the amputated finger and timely detection of local ischemia risks. The touchscreen display visually presents tissue activity data, providing medical staff with objective assessment data, reducing subjective observation errors, and overall improving the quality of care and patient comfort after finger replantation surgery. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a digital real-time temperature-controlled finger-severed thermostat. Figure 2 This is a schematic diagram of the structure of a digital real-time temperature-controlled finger-severed thermostat with the lid open. Figure 3 A schematic cross-sectional view of a digital real-time temperature-controlled finger-severing thermostat. Figure 4 A digital real-time temperature-controlled thermostat for severed fingers Figure 3 Enlarged structural diagram at point A; Figure 5 This is a cross-sectional schematic diagram of the aerodynamic laminar flow heat exchange mechanism in a digital real-time temperature-controlled finger-severed thermostat.

[0018] In the diagram: 1. Box body; 2. Box cover; 3. Touch screen display; 4. Arc-shaped inlet; 5. Flexible sealing silicone ring; 6. Flexible fitting microcirculation pulsation mechanism; 601. Airbag cushion; 602. Finger groove; 603. Independent air chamber; 604. Connecting hose; 605. Electromagnetic pressure relief valve; 606. Miniature air pump; 7. Multimodal tissue activity monitoring mechanism; 701. Doppler blood flow probe; 702. Infrared thermal imaging sensor; 703. Blood oxygen saturation probe; 8. Aerodynamic laminar flow heat exchange mechanism; 801. Heat exchange box; 802. Semiconductor cooling chip; 803. Heat dissipation fins; 804. Mounting plate; 805. Miniature silent fan; 806. L-shaped air duct; 807. Guide plate; 9. Charging port; 10. Honeycomb rectifier plate; 11. Optical viewing window; 12. Partition; 13. Battery; 14. Central controller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 - Figure 5 A digital real-time temperature-controlled thermostat for severed fingers includes a housing 1 and a cover 2 hinged to the housing 1. The front end of the housing 1 has an arc-shaped inlet 4 for the patient's arm to enter. A partition 12 is fixedly connected to the bottom of the inner cavity of the housing 1. The device also includes: The aerodynamic laminar flow heat exchange mechanism 8 is located at the rear of the housing 1 and is used to generate a vertical laminar flow of hot air. The flexible, fitting microcirculation pulsation mechanism 6 is located at the bottom of the housing 1 and is used to fit the patient's palm and apply periodic pulsating pressure to the severed finger area. The multimodal tissue activity monitoring mechanism 7 is located inside the box cover 2 and is used for non-invasive monitoring of blood flow, temperature and metabolic status of the severed finger. The central controller 14 is electrically connected to the aerodynamic laminar flow heat exchange mechanism 8, the flexible fitting micro-circulation pulsation mechanism 6, and the multimodal tissue activity monitoring mechanism 7, respectively, and synchronously adjusts the heat exchange power and pulsation frequency according to the feedback data of the multimodal tissue activity monitoring mechanism 7.

[0021] Through the above technical solutions, the aerodynamic laminar flow heat exchanger 8 generates a vertically uniform laminar flow of hot air, avoiding the local overheating problem of traditional radiant heating; the flexible, conforming microcirculation pulsation mechanism 6 actively promotes blood return and microcirculation perfusion by pulsating and squeezing the severed finger in accordance with the human heart rate frequency; and the multimodal tissue activity monitoring mechanism 7 captures the temperature distribution, blood flow velocity, and blood oxygen data of the severed finger in real time. The central controller 14 dynamically adjusts the heating power and pulsation frequency based on the monitoring data, forming a closed-loop control of "monitoring-feedback-adjustment," which significantly improves the prevention effect of vascular crisis. Specifically, the aerodynamic laminar flow heat exchange mechanism 8 includes a heat exchange box 801, a semiconductor cooling chip 802, heat dissipation fins 803, a mounting plate 804, a miniature silent fan 805, and a honeycomb rectifier plate 10. An L-shaped air duct 806 is formed on the front side of the heat exchange box 801, and a guide plate 807 is connected to the top of the front surface of the heat exchange box 801. An optical window through-hole 11 is embedded in the middle of the inner surface of the honeycomb rectifier plate 10, and the optical window through-hole 11 is vertically arranged on the multimodal tissue activity monitoring mechanism 7. Below; the miniature silent fan 805 blows air regulated by the semiconductor cooling chip 802 toward the honeycomb rectifier plate 10, forming a vertically downward laminar airflow with uniform velocity. The flexible, fitted micro-circulation pulsation mechanism 6 includes an airbag 601, a miniature air pump 606, and an electromagnetic pressure relief valve 605. The upper surface of the airbag 601 is provided with a finger groove 602 that matches the shape of a finger. The miniature air pump 606 is driven by the central controller 14 to inflate and deflate the airbag 601, realizing the simulation of the human heartbeat frequency. The airbag 601, made of medical-grade silicone, provides a pulsating compression. It contains multiple independent air chambers 603, each connected to a micro-pump 606 via a connecting hose 604, enabling differentiated pulsating massage for different finger areas. The multimodal tissue activity monitoring mechanism 7 includes an infrared thermal imaging sensor 702, a Doppler blood flow probe 701, and a blood oxygen saturation probe 703. The infrared thermal imaging sensor 702 acquires two-dimensional temperature distribution images of the severed finger area. The central controller 14 includes a PID control module and a pulsation synchronization module. The PID control module adjusts the power of the semiconductor cooling chip 802 in real time based on the temperature data from the multimodal tissue activity monitoring mechanism 7. The pulsation synchronization module controls the micro-pump 606 to maintain the pulsation frequency in sync with or at an integer multiple of the patient's heart rate based on the blood flow velocity waveform detected by the Doppler blood flow probe 701. The housing 1 and lid 2 are made of double-layer transparent polycarbonate material, with a vacuum insulation panel filling the interlayer.

[0022] Specifically, it also includes a touch screen 3 located on the outside of the housing 1. The touch screen 3 is connected to the central controller 14 and is used to display the temperature distribution image and blood flow velocity data of the severed finger in real time, and to receive user operation commands. A flexible sealing silicone ring 5 and a pressure sensor are provided at the arc-shaped entrance 4. The pressure sensor is used to detect the contact pressure between the patient's arm and the flexible sealing silicone ring 5. When the pressure exceeds a preset threshold, an alarm signal is sent to the central controller 14. A battery 13 is fixedly connected to the bottom of the inner cavity of the housing 1 and on the left side of the bottom of the partition 12. A charging hole 9 is provided at the bottom left side of the housing 1.

[0023] By combining physical thermotherapy with mechanical stimulation, the above technical solutions overcome the limitations of existing equipment's single function of heat preservation. The pulsation mechanism 6, designed to be synchronized with the heart rate, enhances blood flow driving force using the principle of bioresonance, effectively reducing postoperative edema. The infrared thermal imaging sensor 702 replaces single-point temperature measurement, enabling comprehensive monitoring of temperature differences in various areas of the severed finger and timely detection of local ischemia risks. The touch display screen 3 intuitively presents tissue activity data, providing medical staff with objective assessment basis, reducing subjective observation errors, and overall improving the quality of nursing care and patient comfort after finger replantation.

[0024] The specific embodiments of the present invention are as follows: In the initial state, medical staff set the target temperature range, such as 32℃-35℃, and the basic pulsation frequency via the touch display screen 3. The patient inserts the affected arm into the housing 1 through the arc-shaped inlet 4, with the palm naturally placed on the airbag 601 of the flexible, conforming microcirculation pulsation mechanism 6, and the fingers correspondingly embedded in the finger grooves 602. The flexible sealing silicone ring 5 at the arc-shaped inlet 4 conforms to the patient's forearm, forming a relatively sealed, heat-insulating space.

[0025] Step 1: Establishing a constant temperature laminar flow environment. The central controller 14 starts the aerodynamic laminar flow heat exchange mechanism 8, and the semiconductor cooling chip 802 is powered on. It heats or cools according to the set temperature. The generated heat is dissipated through the heat dissipation fins 803. The miniature silent fan 805 blows the temperature-controlled air toward the honeycomb rectifier plate 10. The honeycomb rectifier plate 10 is composed of dense hexagonal guide holes, which can rectify the turbulent airflow into a vertically downward laminar airflow with a uniform velocity distribution. This laminar airflow gently covers the surface of the broken finger, achieving efficient and uniform convective heat exchange, avoiding excessive evaporation of moisture and discomfort caused by direct blowing of traditional fans. Step 2: Real-time monitoring of tissue activity. During the isothermal maintenance process, the multimodal tissue activity monitoring mechanism 7 continues to work. The infrared thermal imaging sensor 702 scans the severed finger area and generates a real-time two-dimensional temperature distribution map, which can accurately identify ischemic areas with low temperature. The Doppler blood flow probe 701 emits a laser beam to the severed finger tissue and receives the frequency change of the reflected light to calculate the microcirculation blood flow velocity. The blood oxygen saturation probe 703 emits light of a specific wavelength through a light-emitting diode and calculates the blood oxygen saturation based on the intensity change of the transmitted light. All the above data are transmitted to the central controller 14 in real time. Step 3: Based on the linkage adjustment of monitoring data, the central controller 14 integrates a PID control module and a pulse synchronization module. When the PID control module receives infrared thermal imaging data, if it finds that the temperature of a certain area is lower than the set threshold, it will immediately increase the heating power of the semiconductor cooling chip 802 and may fine-tune the speed of the miniature silent fan 805 to enhance the heat exchange efficiency of that area until the temperature distribution tends to be uniform. At the same time, the pulse synchronization module analyzes the blood flow velocity waveform measured by the Doppler blood flow probe 701 and extracts the patient's actual heart rate. Subsequently, the pulse synchronization module controls the miniature air pump 606 to rapidly inflate and deflate the airbag 601 at the same frequency as the patient's heart rate, such as 60 times / minute or twice the frequency. When the airbag 601 inflates, it gently squeezes the patient's palm and fingers, simulating the action of a muscle pump to assist venous blood return. When the airbag 601 depressurizes, arterial blood quickly fills in. This pulse stimulation synchronized with the physiological rhythm can effectively activate microcirculation and prevent thrombosis. Step 4: Safety monitoring and adaptive adjustment. Throughout the process, the pressure sensor continuously monitors the pressure between the arm and the sealing ring. If the patient moves and causes excessive pressure, the system will issue an alarm. The central controller 14 will also comprehensively analyze the blood oxygen saturation data. If it is found that the blood oxygen continues to drop, even if the temperature parameters are normal, it will automatically adjust the pulse intensity or prompt medical staff to intervene. Through the cycle of the above four steps, this device achieves real-time digital temperature control of the amputated finger environment and active maintenance of tissue activity.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A digital real-time temperature-controlled thermostat for severed fingers, comprising a housing (1) and a cover (2) hinged to the housing (1), wherein the front end of the housing (1) is provided with an arc-shaped inlet (4) for the patient's arm to be inserted, and a partition (12) is fixedly connected to the bottom of the inner cavity of the housing (1), characterized in that, Also includes: An aerodynamic laminar flow heat exchange mechanism (8) is located at the rear of the housing (1) and is used to generate a vertical laminar flow of hot air. A flexible, fitting microcirculation pulsation mechanism (6) is located at the bottom of the box (1) and is used to fit the patient's palm and apply periodic pulsating pressure to the severed finger. A multimodal tissue activity monitoring device (7) is located inside the box cover (2) and is used for non-invasive monitoring of blood flow, temperature and metabolic status of the severed finger; The central controller (14) is electrically connected to the aerodynamic laminar flow heat exchange mechanism (8), the flexible fitting microcirculation pulsation mechanism (6) and the multimodal tissue activity monitoring mechanism (7), respectively, and adjusts the heat exchange power and pulsation frequency synchronously according to the feedback data of the multimodal tissue activity monitoring mechanism (7).

2. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: The aerodynamic laminar flow heat exchange mechanism (8) includes a heat exchange box (801), a semiconductor cooling chip (802), heat dissipation fins (803), a mounting plate (804), a miniature silent fan (805), and a honeycomb rectifier plate (10). An L-shaped air duct (806) is formed on the front side of the heat exchange box (801). A guide plate (807) is connected to the top of the front surface of the heat exchange box (801). An optical window through hole (11) is embedded in the middle of the inner surface of the honeycomb rectifier plate (10), and the optical window through hole (11) is vertically arranged below the multimodal tissue activity monitoring mechanism (7). The miniature silent fan (805) blows the air regulated by the semiconductor cooling chip (802) toward the honeycomb rectifier plate (10) to form a laminar airflow that is vertically downward and has a uniform flow rate.

3. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: The flexible fitting microcirculation pulsation mechanism (6) includes an airbag (601), a micro air pump (606), and an electromagnetic pressure relief valve (605); the upper surface of the airbag (601) is provided with a finger groove (602) that matches the shape of the finger; the micro air pump (606) is driven by the central controller (14) to inflate and deflate the airbag (601) to realize the pulsating compression that simulates the human heartbeat frequency.

4. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 3, characterized in that: The air cushion (601) is made of medical-grade silicone and has multiple independent air chambers (603) inside. Each independent air chamber (603) is connected to a micro air pump (606) through a connecting hose (604) to achieve differentiated pulsating massage for different finger parts.

5. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: The multimodal tissue activity monitoring mechanism (7) includes an infrared thermal imaging sensor (702), a Doppler blood flow probe (701), and a blood oxygen saturation probe (703); the infrared thermal imaging sensor (702) is used to acquire two-dimensional temperature distribution images of the severed finger area.

6. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 5, characterized in that: The central controller (14) includes a PID control module and a pulse synchronization module; the PID control module adjusts the power of the semiconductor cooling chip (802) in real time according to the temperature data of the multimodal tissue activity monitoring device (7); the pulse synchronization module controls the micro air pump (606) to keep the pulse frequency in sync with or in an integer multiple relationship with the patient's heart rate according to the blood flow velocity waveform detected by the Doppler blood flow probe (701).

7. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: The box body (1) and the box cover (2) are made of double-layer transparent polycarbonate material, with vacuum insulation panels filling the interlayer.

8. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: It also includes a touch screen (3) located on the outside of the housing (1), which is connected to the central controller (14) for displaying the temperature distribution image and blood flow velocity data of the severed finger in real time and receiving user operation commands.

9. The digital real-time temperature-controlled finger-severed constant temperature device according to claim 1, characterized in that: A flexible sealing silicone ring (5) and a pressure sensor are provided at the arc-shaped entrance (4). The pressure sensor is used to detect the contact pressure between the patient's arm and the flexible sealing silicone ring (5). When the pressure exceeds the preset threshold, an alarm signal is sent to the central controller (14). A battery (13) is fixedly connected to the bottom of the inner cavity of the box (1) and on the left side of the bottom of the partition (12). A charging hole (9) is opened at the bottom of the left side of the box (1).

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