Medical device for an ICU intensive care unit

Abstract

The present application relates to the technical field of medical devices, in particular to a medical device for ICU intensive care unit, comprising a bearing shell, a step type advancing dosing member and an infusion control system are integrated in the bearing shell, a height adjusting cavity is arranged in the bearing shell, the advancing dosing member is vertically and slidingly connected in the height adjusting cavity, and an adjusting driving assembly is arranged in the height adjusting cavity; a heart height collecting and positioning assembly is arranged on the side wall of the bearing shell, the heart height collecting and positioning assembly is provided with a signal tag which is pasted on the body side corresponding to the heart position of the patient, the heart height collecting and positioning assembly receives the spatial position information of the signal tag, and the relative height difference between the signal tag and the advancing dosing member is calculated based on the spatial position information. The present application integrates the heart height collecting of the patient, realizes the real-time acquisition of the heart position of the patient and the automatic adjustment of the height of the advancing dosing member, realizes the intelligent adjustment of the height of the syringe, reduces the interference of the hydrostatic pressure on the infusion precision, and ensures the stability of the infusion precision.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and specifically to a medical device for use in an ICU (Intensive Care Unit). Background Technology

[0002] The Intensive Care Unit (ICU) is a clinical unit that provides centralized diagnosis and treatment for critically ill patients. Its core functions are to implement continuous physiological monitoring, immediate life support therapy, and multi-organ function support. In this environment, the success or failure of drug therapy often depends not on the drugs themselves, but on the precision and stability of the administration route. Among these, the ICU infusion pump, as the only carrier for achieving the micro-volume, uniform, and continuous infusion of key treatments such as vasoactive drugs, sedatives and analgesics, and high-concentration electrolytes, directly determines the precision and safety of the patient's life support therapy based on its reliability.

[0003] In the prior art, Chinese patent document CN104815369A discloses a micro-infusion pump device for ICU departments, which mainly includes a device body. The device body is equipped with a step-type propulsion infusion mechanism and a drug flow control box for realizing micro-volume and uniform infusion. Through the synergy of mechanical drive and flow control, it aims to achieve uniform and continuous infusion of micro-volume drugs, replace manual operation with automated drug delivery, reduce clinical human operation errors, and ensure the accuracy and stability of the drug delivery process.

[0004] However, in clinical practice, individual anatomical differences among patients result in varying spatial positions of their cardiac reference point (zero hydrostatic pressure) on the bed. Maintaining coplanarity between the infusion end (i.e., the height of the syringe outlet) and the patient's cardiac plane is crucial for achieving gravity-independent infusion accuracy. If this relative height shifts, the resulting hydrostatic pressure difference will act on the infusion system, introducing additional potential energy through the mechanical compliance of the tubing and syringe. This inevitably leads to a nonlinear deviation between the actual micro-output of the infusion pump and the set value, especially under low-flow-rate infusion conditions. Therefore, it is necessary to propose a medical device for ICU intensive care units to improve the accuracy of matching the actual micro-output with the set value. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a medical device for use in an ICU (Intensive Care Unit) that integrates a real-time hydrostatic pressure interference compensation mechanism to eliminate gravitational potential energy disturbances caused by changes in patient position or syringe position, thereby solving the problem of maintaining the time-domain stability of infusion rate in existing infusion pumps under complex clinical conditions.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A medical device for an ICU intensive care unit includes a supporting shell, in which a step-type push-to-drug device and an infusion control system are integrated. The output end of the push-to-drug device is detachably connected to an extension tube. A height adjustment cavity is provided in the supporting shell. The push-to-drug device is vertically slidably connected to the height adjustment cavity. An adjustment drive component for adjusting the height of the push-to-drug device is provided in the height adjustment cavity.

[0007] The side wall of the supporting housing is equipped with a cardiac height acquisition and positioning component corresponding to the delivery device. The cardiac height acquisition and positioning component is equipped with a signal tag that is pasted on the side of the patient's body corresponding to the heart position. The cardiac height acquisition and positioning component is used to receive the spatial position information of the signal tag, calculate the relative height difference between the signal tag and the delivery device based on the spatial position information, and convert the height difference into a height adjustment signal and output it to the adjustment drive component.

[0008] The technical principle of the above solution is as follows: This solution integrates a step-by-step drug delivery device into the height adjustment cavity within the supporting housing, which is different from the external support structure of the injection pump housing, using a vertical sliding method. An adjustment drive component is configured to control the vertical displacement of the drug delivery device relative to the supporting housing. Simultaneously, a heart height acquisition and positioning component is installed on the side wall of the supporting housing at the position corresponding to the drug delivery device. Combined with a signal tag affixed to the patient's heart at the corresponding position on the body surface, a relative height sensing system between the patient's heart and the syringe outlet is formed. By acquiring the relative height information between the signal tag and the drug delivery device in real time and converting it into a height adjustment signal to drive the adjustment drive component, an automatic injection height following mechanism with the patient's heart level as the reference benchmark is established.

[0009] The above approach has the following beneficial effects:

[0010] 1. Compared to existing technologies that rely on manual visual judgment and adjustment of the infusion pump holder height, this solution reduces the probability of hydrostatic pressure interference caused by individual patient anatomical differences or changes in body position by combining cardiac height acquisition and positioning components with information transmission and reception of signal tags, thereby improving the temporal stability of drug dosage in special low-flow-rate infusion scenarios in the ICU.

[0011] 2. This solution improves the stability of the syringe (drug delivery device)'s basic position during adjustment by setting an independent height adjustment cavity inside the supporting housing and adjusting the local height of the delivery device. This is in contrast to the risks of equipment tilting, pipeline pulling, and multi-channel layout interference that may be caused by moving the entire injection pump support in traditional solutions.

[0012] 3. This solution is based on the automatic adjustment mode of real-time positioning feedback of cardiac height acquisition and positioning components, which solves the response delay problem of manual adjustment. It can complete height compensation before it affects hemodynamics and reduce the risk of adverse events caused by sudden changes in hydrostatic pressure.

[0013] Furthermore, the adjustment drive assembly includes a height adjustment stepper motor and a sliding support plate. The height adjustment stepper motor is fixedly connected to the bottom wall of the height adjustment cavity, and the sliding support plate is vertically slidably connected to the height adjustment cavity. The output shaft of the height adjustment stepper motor is equipped with a ball screw pair, and the ball nut end of the ball screw pair is fixedly connected to the sliding support plate. The drug delivery component is fixedly connected to the sliding support plate.

[0014] Beneficial effects: This design combines the high transmission efficiency of the ball screw with the precise angle control of the height-adjusting stepper motor to achieve millimeter-level precision lifting and lowering of the propellant within the height adjustment cavity. At the same time, the self-locking characteristics of the screw and nut pair ensure that the position remains stable after adjustment, reducing the probability of passive displacement due to gravity or vibration.

[0015] Furthermore, the signal tag includes a flexible magnetic sensor and an adhesive layer.

[0016] Beneficial effects: The flexible magnetic sensor can emit a stable alternating electromagnetic field as a position signal source. Its flexible substrate can fit well with the patient's body surface curve, reducing signal fluctuations caused by breathing or slight body position movements. The adhesive layer ensures that the tag is reliably fixed during long-term monitoring, providing a continuous and stable reference point signal for cardiac height acquisition and positioning components.

[0017] Furthermore, the cardiac acquisition and positioning component includes a receiving antenna array and an acquisition and positioning unit for data processing. The receiving antenna array is embedded in the sliding support plate at the position corresponding to the output port of the delivery device.

[0018] Beneficial effects: This layout ensures a stable spatial geometric relationship between the receiving antenna array and the syringe (drug delivery device) output port, allowing the signal tag coordinates calculated by the electromagnetic field to be directly mapped to the relative height of the drug delivery device and the patient's heart, reducing coordinate transformation errors caused by the separation of the sensor and the actuator.

[0019] Furthermore, the side wall of the supporting housing is provided with a visible adjustment groove corresponding to the sliding displacement stroke of the sliding support plate, and the receiving antenna array is slidably fitted into the visible adjustment groove.

[0020] Beneficial effects: On the one hand, the design guides the movement of the receiving antenna array through the visual adjustment slot, ensuring that it always maintains synchronous displacement with the propelled drug delivery device during the lifting and lowering process. On the other hand, exposing the receiving antenna array to the surface of the supporting housing reduces the shielding effect of the metal structure on electromagnetic signals. At the same time, it provides clinical personnel with an intuitive window to observe the movement status, making it easy to quickly confirm the working status of the system.

[0021] Furthermore, the data processing of the acquisition and positioning unit is specifically as follows:

[0022] The acquisition and positioning unit first acquires the electromagnetic field signal emitted by the flexible magnetic sensor through the receiving antenna array. Then, it converts the electromagnetic field signal and extracts the real-time position coordinates of the flexible magnetic sensor relative to the receiving antenna array. The real-time position coordinates are then compared with the preset heart standard height, and the relative height difference is output. Finally, a height adjustment signal is generated based on the relative height difference and transmitted to the height adjustment stepper motor.

[0023] Beneficial effects: The acquisition and positioning unit establishes a control closed loop from electromagnetic signals to height adjustment stepper motor control commands, realizing continuous tracking of the patient's heart position and dynamic synchronization of injection height.

[0024] Furthermore, the infusion control system also integrates a differential pressure feedback module, which includes a proximal hydraulic sensor, a distal hydraulic sensor, and a feedback unit. The proximal hydraulic sensor is connected to the extension pipeline at the output end of the drug delivery device, and the distal hydraulic sensor is connected to the end of the extension pipeline away from the drug delivery device.

[0025] The feedback unit is used to analyze the change in relative pressure difference between the near and far ends before and after the stepper motor drive is adjusted in real time, in order to determine the effectiveness of the height adjustment.

[0026] Beneficial effects: Hydraulic information from the output end of the delivery device and the patient end of the extension tubing is collected by the proximal hydraulic sensor and the distal hydraulic sensor, respectively, and the relative pressure difference before and after the adjustment is analyzed by the feedback unit; it provides a verification mechanism for magnetic positioning height adjustment, and can confirm whether the height compensation actually cancels the hydrostatic pressure interference by the measured change of pressure parameters.

[0027] Furthermore, both the proximal and distal hydraulic sensors include a T-shaped tee connector and a pressure sensor, with the pressure sensor connected to a vertical branch of the T-shaped tee connector.

[0028] Beneficial effects: The vertical branch of the T-type three-way connector can draw out pressure signals without interrupting the main drug delivery, reducing interference with normal infusion. The direct connection between the pressure sensor and the vertical branch ensures the shortness of the pressure transmission path, improving the accuracy of pressure sampling and response speed.

[0029] Furthermore, the feedback unit receives and processes the proximal and distal hydraulic pressures collected by the two pressure sensors in real time, and calculates the real-time pressure difference based on the proximal and distal hydraulic pressures. When the acquisition and positioning unit sends a height adjustment command to the height adjustment stepper motor, the feedback unit simultaneously records the start and end times of the adjustment command and the pressure difference change from the start time to the end time. Based on the pressure difference change, it judges the effectiveness of the height adjustment or warns of abnormal infusion.

[0030] Beneficial effects: By incorporating the start and end times of the height adjustment of the propulsion device into differential pressure analysis, the pressure fluctuations caused by the adjustment action itself and external interference can be distinguished. The compensation effect can be judged based on the convergence of differential pressure after the adjustment is completed. When an abnormal differential pressure occurs, an early warning is triggered, realizing a functional upgrade from simple numerical monitoring to intelligent diagnosis.

[0031] Furthermore, the inner wall of the height adjustment cavity is provided with several guide grooves, and several limiting blocks that slide in cooperation with the corresponding guide grooves are fixedly connected to the sliding bearing plate.

[0032] Beneficial effects: The sliding constraint structure of the sliding bearing plate, which is composed of several guide grooves and limiting blocks, provides multi-point support for the vertical movement path, suppressing the radial sway and deflection torque that may be caused by unilateral force or mechanical gaps, and ensuring that the propulsion delivery device and the receiving antenna array maintain a precise spatial orientation relationship throughout the entire lifting and lowering process.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the medical device of the present invention for use in an ICU intensive care unit;

[0035] Figure 2 This is an axonometric sectional view of the interior of the supporting housing in an embodiment of the medical device for use in an ICU intensive care unit according to the present invention;

[0036] Figure 3 This is an isometric view of the extension tubing in an embodiment of the medical device for use in an ICU intensive care unit according to the present invention.

[0037] Figure 4 This is an isometric view of a signal tag in an embodiment of the medical device for use in an ICU intensive care unit according to the present invention;

[0038] Figure 5 This is a schematic diagram of the limiting block and guide groove in an embodiment of the medical device of the present invention for use in an ICU intensive care unit;

[0039] Figure 6This is a schematic diagram of the operation process of the data acquisition and positioning unit in an embodiment of the medical device for use in the ICU intensive care unit of the present invention;

[0040] Figure 7 This is a schematic diagram of the operation flow of the feedback unit in an embodiment of the medical device for use in an ICU intensive care unit according to the present invention.

[0041] The reference numerals in the accompanying drawings include: 1. Support housing; 2. Propulsion delivery component; 3. Extension tubing; 4. Height adjustment cavity; 5. Signal tag; 501. Flexible magnetic sensor; 502. Adhesive layer; 6. Height adjustment stepper motor; 7. Sliding support plate; 8. Ball screw pair; 9. Receiving antenna array; 10. Visual adjustment slot; 11. Proximal hydraulic sensor; 12. Distal hydraulic sensor; 13. T-shaped tee connector; 14. Pressure sensor; 15. Warning indicator light; 16. Guide groove; 17. Limiting block; 18. Human-machine interface screen. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described 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.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The following detailed description illustrates the specific implementation method:

[0046] Example 1:

[0047] This embodiment provides a medical device for use in an ICU (Intensive Care Unit), specifically as follows: Figure 1 As shown, the device includes a carrier housing 1, within which a stepping-type drug delivery device 2 is integrated (the stepping-type drug delivery device 2 is preferably a rotary-propelled electro-controlled injector with a stepper motor and lead screw). The driving component of the stepping-type drug delivery device 2 is signal-connected to an infusion control system (a human-machine interface screen 18 is embedded on the carrier housing 1, and the infusion control system is electrically connected to the human-machine interface screen 18). The output end of the drug delivery device 2 is detachably connected to an extension tubing 3. Medical personnel can input drug injection requirements (including infusion rate, preset infusion volume, drug concentration, etc.) through the human-machine interface screen 18. Based on the drug characteristics, the driving parameters of the drug delivery device 2 are matched to drive the stepping-type drug delivery device 2, thereby realizing differentiated intelligent infusion control of different drugs in the ICU.

[0048] Based on the need for infusion pumps to administer medications (especially central venous infusions) in the ICU, specifically maintaining the syringe outlet height coplanar with the patient's heart level to reduce the impact of net water pressure differential on infusion accuracy, existing technologies typically employ manual adjustment of the infusion pump holder to control the pump height. The unique feature of this embodiment lies in combining... Figure 1 and Figure 2 As shown:

[0049] A height adjustment cavity 4 is provided inside the support housing 1. The injection device 2 is vertically slidably connected to the height adjustment cavity 4. The height adjustment cavity 4 is provided with an adjustment drive assembly for adjusting the height of the injection device 2. In this embodiment, the height of the injection device 2 (i.e., the syringe) is adjusted within the height adjustment cavity 4, which is different from the traditional method of changing the infusion height by moving the support frame of the entire injection pump (i.e., the support housing (1)). Since the support housing (1) is stably fixed on the table or bracket, the height adjustment action is restricted to the inside of the housing, thereby avoiding the equipment tilting that may be caused by moving the entire pump body, and reducing the risk of adverse effects on the spatial posture of the injection device (2) during the height adjustment process (such as tilting of the liquid level inside the syringe or changes in the force on the pipeline interface). For the adjustment drive assembly, such as Figure 2 As shown:

[0050] The adjustment drive assembly includes a height-adjusting stepper motor 6 and a sliding support plate 7. The height-adjusting stepper motor 6 is fixedly connected to the bottom wall of the height adjustment cavity 4 by bolts. The sliding support plate 7 is vertically slidably connected to the height adjustment cavity 4 via a sliding rail. The output shaft of the height-adjusting stepper motor 6 is equipped with a ball screw assembly 8 (the ball screw assembly 8 includes a screw and a ball nut). The ball nut is fixedly connected to the sliding support plate 7 by screws. The push-in drug delivery component 2 is fixedly connected to the sliding support plate 7 by bolts. The selection of the height-adjusting stepper motor 6 enables millimeter-level height adjustment.

[0051] like Figure 1 and Figure 2 As shown, the side wall of the supporting housing 1 is equipped with a cardiac height acquisition and positioning component corresponding to the drug delivery device 2. The cardiac height acquisition and positioning component is equipped with a signal tag 5 affixed to the side of the patient's body corresponding to the heart position. The cardiac height acquisition and positioning component receives the spatial position information of the signal tag 5, calculates the relative height difference between the signal tag 5 and the drug delivery device 2 based on the spatial position information, and converts the height into a height adjustment signal to the adjustment drive component. Based on this, automated adjustment based on the patient's cardiac height information is achieved, moving from manual judgment to automatic adjustment. Compared with manual adjustment, this reduces the risk of hemodynamic fluctuations caused by response delay. By controlling the positioning error within a millimeter-level threshold, hydrostatic interference is offset, ensuring the continuity and accuracy of drug dosage in low-flow-rate infusion scenarios. Specifically, regarding the cardiac height acquisition and positioning component and the signal tag 5, in conjunction with... Figure 1 , Figure 2 and Figure 4 As shown:

[0052] Signal tag 5 includes a flexible magnetic sensor 501 and an adhesive layer 502; the cardiac height acquisition and positioning component includes a receiving antenna array 9 (preferably composed of three orthogonal loop coils) and an acquisition and positioning unit for data processing. The receiving antenna array 9 is embedded in the sliding support plate 7 at the position corresponding to the output port of the delivery device 2. The data processing of the acquisition and positioning unit refers to existing magnetic positioning systems, as follows: Figure 6 As shown:

[0053] The acquisition and positioning unit first acquires the electromagnetic field signal emitted by the flexible magnetic sensor 501 through the receiving antenna array 9. Then, it converts the electromagnetic field signal and extracts the real-time position coordinates of the flexible magnetic sensor 501 relative to the receiving antenna array 9. The real-time position coordinates are then compared with the preset standard heart height (a reference height value set by manual calibration or patient physiological parameters during initial installation) to output the relative height difference. Finally, a height adjustment signal is generated based on the relative height difference and transmitted to the height adjustment stepper motor 6.

[0054] Based on the above-mentioned method of adjusting the height of the drug delivery device 2 by obtaining relative height difference information through magnetic positioning, compared with the existing infusion pump height adjustment technology that usually uses the hydraulic difference height adjustment method at both ends of the infusion line, it realizes direct measurement and real-time tracking of the relative height between the drug delivery device 2 and the patient's heart. It reduces the interference and decoupling error of the hydraulic difference signal caused by factors such as changes in drug viscosity, differences in tubing compliance, or fluctuations in venous pressure at the patient's end. It can be triggered when the patient's body position changes, rather than waiting for pressure changes to occur before feedback adjustment, reducing the probability of drug infusion rate fluctuations caused by height difference recognition lag or deviation in low flow rate infusion scenarios.

[0055] In addition, such as Figure 2 As shown, the side wall of the supporting housing 1 is provided with a visible adjustment groove 10 corresponding to the sliding displacement stroke of the sliding support plate 7. The receiving antenna array 9 is embedded in the sliding support plate 7 and correspondingly slides within the visible adjustment groove 10. On the one hand, this ensures that the receiving antenna array 9 and the drug delivery device 2 maintain a stable relative position during the lifting process, reducing the probability of positioning reference drift caused by misalignment between the receiving antenna array 9 and the drug delivery device 2. On the other hand, exposing the receiving antenna array 9 to the surface of the supporting housing 1 can reduce the shielding and attenuation of high-frequency electromagnetic signals by the supporting housing 1 or its internal height adjustment stepper motor 6. At the same time, medical staff can directly observe the real-time movement position of the antenna array through the visible adjustment groove 10, which facilitates clinical staff to quickly confirm the system's working status and perform manual calibration or emergency operations.

[0056] Example 2:

[0057] As attached Figure 7 As shown, the difference from Embodiment 1 is that, based on the hydraulic data acquisition feedback typically found in existing syringe pumps to verify the accuracy of infusion control, this embodiment's infusion control system also integrates a differential pressure feedback module for checking the effectiveness of height adjustment through the pressure difference feedback between the infusion port and the syringe output port. Specifically:

[0058] The differential pressure feedback module includes a proximal hydraulic sensor 11, a distal hydraulic sensor 12, and a feedback unit. The proximal hydraulic sensor 11 is connected to the extension line 3 at the output end of the drug delivery device 2, and the distal hydraulic sensor 12 is connected to the end of the extension line 3 away from the drug delivery device 2. Both the proximal hydraulic sensor 11 and the distal hydraulic sensor 12 include a T-shaped three-way connector 13 and a pressure sensor 14. The pressure sensor 14 is connected to the vertical branch of the T-shaped three-way connector 13 (to draw pressure signals from the main infusion line and reduce the impact on drug delivery).

[0059] The feedback unit receives and processes the proximal and distal hydraulic pressures collected by the two pressure sensors 14 in real time, and calculates the real-time pressure difference based on the proximal and distal hydraulic pressures. When the acquisition and positioning unit sends a height adjustment command to the height adjustment stepper motor 6, the feedback unit simultaneously records the start and end times of the adjustment command, records the pressure difference change from the start time to the end time, and makes judgments according to the following conditions:

[0060] If the real-time pressure difference gradually decreases after the adjustment is completed, the height adjustment is considered effective.

[0061] If the real-time differential pressure remains unchanged or increases after the adjustment is completed, the height adjustment is deemed invalid, triggering and generating an infusion abnormality command. A warning indicator 15, which is connected to the feedback unit signal, is embedded and fixed on the side wall of the carrier housing 1. The warning indicator 15 is used to capture the infusion abnormality command and generate an optical signal to alert medical staff to infusion abnormalities (including infusion tubing abnormalities or patient movement).

[0062] Example 3:

[0063] As attached Figure 5 As shown, the difference from Embodiment 2 is that the inner wall of the height adjustment cavity 4 is provided with several guide grooves 16, and several limiting blocks 17 are integrally formed on the sliding support plate 7, which slide in cooperation with the corresponding guide grooves 16. Through the sliding cooperation between the guide grooves 16 and the limiting blocks 17, a sliding constraint structure of multiple guide blocks is constructed on the vertical movement path of the sliding support plate 7, reducing the radial sway and deflection torque of height adjustment, and ensuring that the propulsion delivery device 2 and the receiving antenna array 9 maintain a constant relative posture during the lifting and lowering process.

[0064] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A medical device for use in an ICU (Intensive Care Unit), comprising a supporting housing (1), wherein a step-type drug delivery device (2) and an infusion control system are integrated within the supporting housing (1), and the output end of the drug delivery device (2) is detachably connected to an extension tube (3), characterized in that, The bearing housing (1) has a height adjustment cavity (4) inside, and the push-to-drug delivery device (2) is vertically slidably connected to the height adjustment cavity (4). The height adjustment cavity (4) is provided with an adjustment drive assembly for adjusting the height of the push-to-drug delivery device (2). The side wall of the housing (1) is provided with a cardiac height acquisition and positioning component corresponding to the push-to-drug device (2). The cardiac height acquisition and positioning component is equipped with a signal tag (5) pasted on the side of the patient's body corresponding to the heart position. The cardiac height acquisition and positioning component is used to receive the spatial position information of the signal tag (5), calculate the relative height difference between the signal tag (5) and the push-to-drug device (2) based on the spatial position information, and convert the height difference into a height adjustment signal and output it to the adjustment drive component.

2. The medical device for use in an ICU (Intensive Care Unit) according to claim 1, characterized in that, The adjustment drive assembly includes a height adjustment stepper motor (6) and a sliding support plate (7). The height adjustment stepper motor (6) is fixedly connected to the bottom wall of the height adjustment cavity (4). The sliding support plate (7) is vertically slidably connected to the height adjustment cavity (4). The output shaft of the height adjustment stepper motor (6) is equipped with a ball screw pair (8). The ball nut end of the ball screw pair (8) is fixedly connected to the sliding support plate (7). The push-to-drug delivery component (2) is fixedly connected to the sliding support plate (7).

3. The medical device for use in an ICU according to claim 2, characterized in that, The signal tag (5) includes a flexible magnetic sensor (501) and an adhesive layer (502).

4. The medical device for use in an ICU according to claim 3, characterized in that, The cardiac acquisition and positioning component includes a receiving antenna array (9) and an acquisition and positioning unit for data processing. The receiving antenna array (9) is embedded on the sliding support plate (7) at the position corresponding to the output port of the push-to-drug delivery device (2).

5. The medical device for use in an ICU according to claim 4, characterized in that, The side wall of the bearing housing (1) is provided with a visible adjustment groove (10) corresponding to the sliding displacement stroke of the sliding bearing plate (7), and the receiving antenna array (9) is slidably fitted in the visible adjustment groove (10).

6. The medical device for use in an ICU according to claim 5, characterized in that, The data processing of the acquisition and positioning unit is as follows: The acquisition and positioning unit first acquires the electromagnetic field signal emitted by the flexible magnetic sensor (501) through the receiving antenna array (9), then converts the electromagnetic field signal and extracts the real-time position coordinates of the flexible magnetic sensor (501) relative to the receiving antenna array (9), then compares the real-time position coordinates with the preset heart standard height, outputs the relative height difference, and finally generates a height adjustment signal based on the relative height difference and transmits it to the height adjustment stepper motor (6).

7. The medical device for use in an ICU according to claim 6, characterized in that, The infusion control system also integrates a differential pressure feedback module, which includes a proximal hydraulic sensor (11), a distal hydraulic sensor (12), and a feedback unit. The proximal hydraulic sensor (11) is connected to the extension line (3) at the output end of the delivery device (2), and the distal hydraulic sensor (12) is connected to the end of the extension line (3) away from the delivery device (2). The feedback unit is used to analyze the relative pressure difference between the near and far ends before and after the stepper motor (6) is driven in real time to determine the effectiveness of the height adjustment.

8. The medical device for use in an ICU intensive care unit according to claim 7, characterized in that, Both the proximal hydraulic sensor (11) and the distal hydraulic sensor (12) include a T-shaped tee connector (13) and a pressure sensor (14), with the pressure sensor (14) connected to the vertical branch of the T-shaped tee connector (13).

9. The medical device for use in an ICU (Intensive Care Unit) according to claim 8, characterized in that, The feedback unit receives and processes the proximal and distal hydraulic pressures collected by the two pressure sensors (14) in real time, and calculates the real-time pressure difference based on the proximal and distal hydraulic pressures. When the acquisition and positioning unit sends a height adjustment command to the height adjustment stepper motor (6), the feedback unit records the start and end times of the adjustment command and the pressure difference change from the start time to the end time. Based on the pressure difference change, the effectiveness of the height adjustment is judged or an abnormal infusion is warned.

10. The medical device for use in an ICU (Intensive Care Unit) according to claim 9, characterized in that, The inner wall of the height adjustment cavity (4) is provided with several guide grooves (16), and several limiting blocks (17) that slide in cooperation with the corresponding guide grooves (16) are fixedly connected on the sliding bearing plate (7).

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