CN111388795A - A mobile medical device suitable for stroke patients - Google Patents

Abstract

The present invention relates to a mobile medical device suitable for stroke patients. The mobile medical device comprises: a syringe pump housing, which has an open end of the housing and a drug storage cartridge for storing medicine; a pump driving device, which is configured in in the syringe pump housing for dispensing the drug in the cartridge; a capping assembly assembled on the syringe pump housing by engaging with the open end of the housing for removing the drug from the reservoir; The medicine dispensed in the cartridge is delivered to the outside of the syringe pump housing, wherein an axial microscopic micrometer is formed between the outer wall of the end of the capping assembly assembled on the syringe pump housing and the inner wall of the syringe pump housing. a gap, the capping assembly has a first sealing element, the first sealing element is located at the joint position between the syringe pump housing and the capping assembly that are in contact with each other and is connected to the axial slight gap connected.

Description

A mobile medical device suitable for stroke patients

technical field

The invention relates to the technical field of infusion devices for introducing media into the body by injection, in particular to a mobile medical device suitable for stroke patients.

Background technique

Cerebral Stroke (Cerebral Stroke, also known as stroke or cerebrovascular accident) refers to a group of diseases that damage brain tissue caused by sudden rupture of blood vessels in the brain or obstruction of blood vessels, including ischemic stroke (Ischemic Stroke) and Hemorrhagic stroke (Hemorrhagic Stroke) two categories. As a common neurological disease, stroke has become a major disease that seriously threatens residents' life, health and quality of life because of its high morbidity, mortality, recurrence and disability rates. Diabetes is an independent risk factor for ischemic stroke. Long-term hyperglycemia increases the risk of stroke. The incidence of stroke in diabetic patients is four times that of normal people. Hyperglycemia damages cerebral blood vessels through various pathways, leading to atherosclerosis and affecting the elasticity of blood vessel walls. Due to complications such as dyslipidemia, hypertension, atherosclerosis, and increased blood viscosity, the heart, brain and systemic tissues are damaged and ischemia occurs. One of the main manifestations of sexual or hemorrhagic symptoms, namely cardiovascular and cerebrovascular complications, is ischemic stroke.

Acute stroke (Acute Cardiovascular Disease, ACVD) is one of the emergency medical and surgical diseases, its etiology is complex and the progress is rapid, 80% to 90% of ultra-early cerebral infarction in China is caused by thrombus blocking the cerebral artery, only early thrombolysis and Recanalization of the occluded cerebral blood vessels can save the brain tissue in the ischemic penumbra and avoid the necrosis of ischemic brain cells. Thrombolytic therapy has a strict time limit, and patients must be diagnosed and treated in a timely manner within the specified time, and even patients who meet the conditions for thrombolytic therapy are not absolutely safe. Many basic studies have confirmed that the probability of active rebleeding in patients with cerebral hemorrhage is inversely proportional to the time after cerebral hemorrhage, especially within 6 hours, that is, permanent neurological damage will occur within 6 hours of cerebral ischemia. Once the ischemic brain tissue dies, thrombolytic therapy will be completely useless, and may even lead to thrombolytic symptomatic cerebral hemorrhage. Studies have shown that the proportion of patients with cerebral hemorrhage caused by thrombolytic therapy is about 1% to 5%, and once cerebral hemorrhage occurs with thrombolytic therapy, it is more difficult to stop bleeding than ordinary bleeding, and even leads to death. Therefore, timely diagnosis and treatment of stroke patients are extremely important. According to reports, Wuhan No. 3 Hospital once ran out of the "Chinese speed" of stroke rescue with fast, timely and efficient rescue of a patient, so that the patient was treated in a timely and effective manner. At the first moment of hemorrhagic stroke, the medical staff immediately took out the microinjection pump in the portable thrombolysis bag and injected the thrombolytic drugs into the patient's body. The convenient mobile medical device won precious rescue time for the medical staff.

As a high-precision medical instrument for clinical infusion of liquid medicine, the syringe pump is controlled by a microprocessor, has a constant pressure, perfect data display, and can accurately control the infusion speed and infusion volume according to the required value; it can maintain intravenous infusion for 24 hours , to ensure the effective concentration of blood drugs, reduce infusion side effects and complications; infusion blockage or completion of infusion can prompt the nurse to deal with the timely alarm. Syringe pump system consists of control system, input system, output system, stepper motor, state detection system, syringe, power supply, alarm system and other components. The main control module uses a single-chip microcomputer to realize the control of the entire system, including work control, parameter calculation, keyboard input status display, pressure detection, automatic labeling and automatic alarm functions. The power circuit is composed of power selection, charging part and voltage boosting part. The power supply circuit provides the working power of the components, can automatically switch the internal and external power supply, and automatically charge the internal power supply when the external power supply is used. After charging is completed, the charging line is automatically disconnected. If the external power is cut off, the internal power supply can automatically supply power. Stepper motor connection modules require motor control systems capable of high torque, low vibration levels, low noise, fast response, and efficient drive. Stepper motor distribution controller to obtain quasi-sine wave drive current. The clock signal controls the speed of the stepper motor. After getting the command of the circuit, the stepper motor drive circuit gets the loading voltage, drives the stepper motor through a certain pulse excitation, the stepper motor rotates at a certain regular pulse frequency, and then drives the power source to the secondary reduction box Decelerate, so that the output speed is further refined and transmitted to the lead screw. The lead screw forms an external circulation rolling screw pair with the half-nut structure to accurately transmit the speed to the baffle, providing a stable and accurate feeding motion. . The automatic alarm system mainly includes: shedding warning, system warning, normal working indication, battery warning, external power warning and other functions. Use buzzer to sound or light-emitting diode to generate warning signal. Pressure detection system. A sensor is a device or device that can feel or respond to a specified physical quantity to be measured and convert it into a usable signal output according to a certain rule. It can convert the input variable into an electrical signal that can be detected, and send various parameters to the computer. It is a kind of front-end component in the measurement system for intelligent monitoring and control. Commonly used pressure sensors include resistance strain gauge pressure sensor, semiconductor strain gauge pressure sensor, piezoresistive pressure sensor, inductive pressure sensor, capacitive pressure sensor, resonant pressure sensor and capacitive acceleration sensor, optical fiber pressure sensor, etc. Often used in syringe pumps are resistive pressure sensors. The working principle of the resistive sensor is to convert the measured non-electrical quantity into a resistance value, and the purpose of measuring the non-electrical quantity is achieved by measuring the resistance value. When there is no differential pressure, the two arms of the bridge are equal. The differential pressure signal is applied to the ceramic varistor, and the resistance of the varistor changes with the differential pressure, causing the bridge to be unbalanced. The unbalance of the bridge causes the change of the current. After amplification, the analog signal is converted into a digital signal, and then transmitted to the CPU for processing. When working, the single-chip microcomputer system sends out control pulses to make the stepper motor rotate, and the stepper motor drives the screw to turn the rotary motion into a linear motion, and pushes the piston of the syringe for injection and infusion, achieving high-precision, stable and pulsation-free liquid transmission. The injection speed can be set by the operator through keyboard operation. After the syringe pump is started, the CPU provides the motor drive voltage by means of D/A conversion. The motor rotation detection circuit is a group of photoelectric coupling circuits, which generate a pulse signal through the rotation of the motor, and this pulse signal is fed back to the CPU, and the CPU controls the motor voltage according to this feedback to obtain the set speed.

Syringe pumps have been widely used in the fields of blood transfusion, anesthesia injection, intake of anticancer agents, and painkiller injection due to their excellent and precise quantitative characteristics. There are also many invention patents at home and abroad. For example, in the prior art, the aviation mobile intensive care rescue equipment disclosed in the patent document with the announcement number CN205286820U whose authorization announcement date is June 8, 2016 mainly includes guardrails, power boxes, support legs, equipment compartments, and equipment. A cardiac defibrillator is installed on one side of the end face of the warehouse, a syringe pump is installed on the other side, a ventilator is installed in the middle of the equipment warehouse, an infusion pump is installed on the side of the ventilator, and an adjustment button is installed on the side of the infusion pump. The beneficial effects are as follows: the whole device has a compact, light and portable structure; built-in intensive care equipment; the light composite structure can be used for both civil and military use, and is equipped with oxygen equipment or external oxygen supply for ambulances and airplanes.

Another example is a syringe pump disclosed in the patent document with the announcement number CN208259980U on December 21, 2018. The syringe pump includes: a syringe pump body, a transmission mechanism, and a monitoring mechanism; wherein, the transmission mechanism includes: a slider , slide rail, push rod, push handle, the slide block can reciprocate along the slide rail; the monitoring mechanism includes: a sensor for monitoring the moving position of the slide block, which is arranged on the slide block and can move synchronously with the slide block; the syringe pump also includes: Set in the syringe pump body to receive the data of the moving position of the slider monitored by the sensor, and calculate the current position of the slider and/or the remaining liquid medicine in the syringe and/or the remaining time of injection according to the data of the moving position of the slider, and send it to the alarm mechanism The control mechanism of the alarm instruction; the alarm mechanism arranged in the syringe pump body and used to send out an alarm signal according to the received alarm instruction. By using the syringe pump, the monitoring process of the injection state of the medicinal liquid can be stable and reliable, and the detection process is not affected by restrictive factors such as the structure of the syringe.

Another example is a syringe pump disclosed in the patent document with the publication date of June 18, 2019 and the publication number CN109893719A, comprising a housing body, a fixing mechanism arranged in the housing body and used for fixing the syringe, slidably arranged on the The push mechanism on the shell body for pressing the syringe is a drive mechanism arranged in the shell body and connected with the push mechanism; the syringe pump also includes a control circuit, a display panel, a keyboard input panel and a detection module; the control circuit It is arranged in the main body of the casing to control and coordinate the work of various mechanisms of the syringe pump; the display panel is arranged on the main body of the casing to display the working conditions of the syringe pump; the keyboard input panel is arranged on the main body of the casing to set the operation of the syringe pump. to determine the working conditions of the syringe pump, such as selecting the injection time and injection speed of the syringe pump; the detection module is arranged on the fixed mechanism and is used to detect the flow change and weight change of the syringe respectively; the display panel, the keyboard input panel and the The detection modules are respectively connected to the control circuit. The detection module includes several infrared pairs of tubes and pressure sensors for real-time detection of the injection speed of the syringe pump. The device can monitor the injection speed of the syringe pump in real time by setting the infrared pair tube group and the pressure sensor, and reduce the safety accidents caused by the abnormal injection speed of the syringe pump.

For example, a syringe pump hanger proposed in the patent document with the announcement number CN209519190U whose authorization announcement date is October 22, 2019 includes a hanger quick-connection bottom plate and a double-layer placement rack, and the double-layer placement rack passes through the syringe pump. The hanging block of the hanger is fixedly connected to the bottom plate of the hanger quick-connection. The other side of the bottom plate of the hanger quick-connection relative to the double-layer placement rack is provided with a number of guide rail submerged parts, and two relatively independent syringe pumps are arranged in the double-layer placement rack. In the placement area, the syringe pump is fixedly placed in the double-layer placement rack, and the double-layer placement rack is provided with an elastic fixing device, and the hanger quick-connection bottom plate connected with the double-layer placement rack is installed on the guide rail in the engine room through the guide rail submerged parts, The syringe pump can be stably placed at a specific position in the cabin, and it is easy to move and disassemble during rescue use. The syringe pump is stably placed and fixed through the syringe pump hanger, and the suspension and disassembly can be completed quickly and easily in the helicopter cabin. , to facilitate the work of the syringe pump in the helicopter air rescue. The above patent documents point out the application requirements of the syringe pump in the field of air rescue, and solve the problem of placement and fixation of the syringe pump in the helicopter cabin, which directly affects the use of the syringe pump and the rescue efficiency during the development of the air rescue.

However, when the existing syringe pump is applied to the field of air rescue, it is inevitable to face the change of the air pressure in the cabin during the flight. In the aviation environment, the pressure change will have an impact on the human body and the infused liquid. The syringe pump Inconsistent internal and external pressures may expand the gas remaining in the liquid storage bottle, eventually causing the liquid to accidentally spill from the infusion tube. At the same time, in intravenous infusion, only when the pressure of the liquid is greater than the venous pressure, the drug liquid may flow into the blood vessel, and in the case of accidental overflow of the drug liquid from the infusion tube, the syringe pump cannot achieve precise control of the infusion speed and infusion volume. In addition, the turbulent air flow will cause the liquid in the liquid storage bottle and the infusion tube to mix with the air, which will greatly increase the probability of the air entering the human circulatory system with the infusion tube.

In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, because the inventor has studied a large number of documents and patents when making the present invention, but the space limit does not list all the details and contents in detail, but this is by no means The present invention does not possess the features of the prior art, on the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art.

SUMMARY OF THE INVENTION

The syringe pump is mainly composed of a drug storage cartridge, a pump drive device and a pipeline, etc. to form a relatively closed passage. When using a syringe pump, it is necessary to connect the inside of the drug storage cartridge in the passage with the external environment to realize the infusion of the medicinal liquid. However, if the syringe pump is used in an environment with rapid and large changes in the external ambient air pressure, such as in aviation flight, submarine diving, etc., the gas remaining in the storage cartridge may cause accidental spillage of the liquid medicine. On the one hand, this situation is due to : The liquid medicine was originally transferred to the storage cartridge under atmospheric pressure, and some gas was inevitably retained in the liquid storage cylinder. The wall of the liquid storage cylinder was not completely smooth and a large number of tiny air bubbles were attached. Note that there is no direct impact, but when the external ambient pressure of the syringe pump changes rapidly and substantially relative to the atmospheric pressure, the liquid medicine appears supersaturated and begins to gradually separate the gas, and the relatively closed passage of the syringe pump itself cannot release the gas in the cylinder , and make the gas pressure increase, and the gas with the increased pressure in the barrel increases the infusion rate of the liquid medicine infused outward in the barrel; on the other hand, this situation will cause the syringe pump to fail to deliver the expected infusion rate or The injection volume is used to infuse the liquid medicine, and the syringe pump cannot achieve precise control of the infusion speed and infusion volume. In addition, for example, in the environment where the air flow is prone to turbulence, such as aviation flight and submarine diving, it is easy to cause the liquid in the liquid storage tank and the infusion tube to mix with the air, and the probability of the air entering the human circulatory system with the infusion tube is greatly increased. The patient's medication actually increases the risk of air embolism.

In view of the deficiencies of the prior art, the mobile medical device proposed in this application, especially the disposable mobile medical device that can be used in an environment where the external ambient air pressure changes rapidly and greatly, can be quickly assembled and directly connected when needed. The infusion device administers the drug to the patient. On the one hand, the realization of the function suitable for drug delivery in an environment where the external ambient air pressure changes rapidly and greatly is that, in the mobile medical device, the small circumferential gap set between the syringe pump housing and the cover assembly is connected to the The first sealing element at the joint position between the housing of the syringe pump connected to each other and the capping assembly is communicated with the first sealing element, which eliminates the syringe pump in the prior art that is relatively airtight and cannot release the gas in the cylinder structure; on the other hand, the mobile medical device has a non-integrated structure between the second sealing element and the first sealing element, the manufacturing process is simple, and the syringe pump housing is engaged with the capping assembly When the second sealing element is subjected to an axial compression force, the end portion corresponding to the inner end surface of the first part and the first sealing element are in non-tight fit. Different from the technical solution in the prior art that the injection of the syringe pump is controlled by the central processing unit, and the syringe pump cannot be controlled accurately due to the change of the environmental pressure, the mobile medical device provided by the present invention is simply assembled. , it can achieve accurate drug delivery in an environment where the external ambient air pressure changes rapidly and greatly, and the device has a simple manufacturing process, which further reduces the manufacturing cost of the disposable mobile medical device.

First, an explanation is given for the small axial gap in this application: the axial direction means that the flow direction of the gap is mainly along the axial direction of the syringe pump housing to communicate with the external environment. Small means that the vertical width between the end faces on both sides used to form the gap is narrow enough to allow gas to be discharged through the vertical width. For example, the vertical width (range) between the end faces on the two sides can be taken as The maximum attainable value is set to [30 μm, 60 μm], and/or the minimum attainable value is set to [5 μm, 20 μm]. As shown in Figures 2 and 3, the formation of the gap is mainly formed during the engagement between the cover assembly and the open end of the housing. The shape of the outer wall of the end of the closure assembly matches the shape of the inner wall of the open end of the casing. After the cover assembly is sleeved into the inner wall of the open end of the casing, and the cover assembly and the open end of the casing are relatively fixed, the outer peripheral surface of the cover assembly extending continuously along the circumferential direction of its cylindrical end is connected to the casing. The small axial gap is formed between the inner peripheral surfaces of the open end which extend continuously along the circumferential direction of the cylindrical end portion thereof. The small axial gap is a continuous extension from the cover assembly along the circumference of its cylindrical end in the circumferential direction with the central axis of the syringe pump casing as the rotation axis and in the axial direction of the syringe pump casing. The outer peripheral surface is defined by the inner peripheral surface on the open end of the casing that extends continuously along the circumference of the cylindrical end portion thereof, and is communicated with the inner cavity and the inner cavity of the open end of the casing respectively in the axial direction of the syringe pump casing. The outer peripheral surface of the capping assembly communicates with the space defined by the at least one gasket in the inner cavity.

According to the present invention, a mobile medical device suitable for stroke patients, the mobile medical device comprises: a syringe pump housing having an open end of the housing and a drug storage cartridge for storing medicine; a pump driving device configured in all in the syringe pump housing for dispensing the medicine in the storage cartridge; a capping assembly assembled on the syringe pump housing by engaging with the open end of the housing for removing the medicine from the storage cartridge The medicine dispensed from the cartridge is delivered to the outside of the syringe pump housing, wherein a small axial gap is formed between the outer wall of the end of the capping assembly assembled on the syringe pump housing and the inner wall of the syringe pump housing , the capping assembly has a first sealing element, the first sealing element is located at the joint position between the syringe pump housing and the capping assembly that are in contact with each other and is connected with the small axial gap Pass. Here, the axial direction mentioned in the present invention refers to the longitudinal extension direction of the drug storage cartridge, or refers to the direction in which the capping assembly and the syringe pump casing are engaged and arranged side by side. The radial direction mentioned below is the direction perpendicular to the above-mentioned axial direction.

According to a preferred embodiment of the present invention, the first sealing element has an inner end face in the radial direction for providing a ventilation path for gas flow inside the syringe pump housing. The inner end face here refers to the inner wall of the inner ring of the annular first sealing element. Preferably, the first sealing element may be fixed on the syringe pump housing. In this case, since the position of the first sealing element is fixed, the dimensional accuracy of the first sealing element is required to be low. The first sealing element may also be non-fixedly mounted on the syringe pump housing. In this case, since the first sealing element is movable, the dimensional accuracy of the first sealing element is required to be high.

According to a preferred embodiment of the present invention, the inner end surface of the first sealing element surrounds an annular groove formed on the outer wall of the end portion of the cover assembly. Here, the end of the cover assembly with the annular groove is the end that is engaged with the open end of the housing of the syringe pump. Since the inner end face is located in the annular groove, that is, the first sealing element is positioned at the position where the annular groove is provided on the outer wall of the end portion of the capping assembly. Here, the end faces of the annular groove that are parallel to the outer wall of the cover assembly are regarded as the bottom face, and the two annular end faces of the annular groove that are parallel to each other are regarded as the two side end faces. It is further preferred for the annular groove, viewed in the axial length, the axial length of the end face on one side of the end faces on both sides that is closer to the open end of the casing is shorter than the axial length of the end face on the other side by a preset amount. size. The axial length of the side end surface relatively far away from the open end of the housing may be not less than the diameter of the outer ring of the first sealing element, and the side end surface provides stable support for the first sealing element to limit its deformation.

According to a preferred embodiment of the present invention, the first sealing element at least comprises a microporous structure material with a high specific surface area. The microporous structure material with high specific surface mentioned here especially refers to the hydrophobic gas-permeable material. Here, for example, the first sealing element is preferably expanded polytetrafluoroethylene (Expanded Polytetrafluoroethylene, EPTFE). There are hundreds of millions of micropores, and the diameter of the micropores is 0.2 to 1.0 μm, which is more than 10,000 times smaller than that of water droplets. Even the smallest water droplets (the diameter of fog particles are about 25 μm) cannot pass through the film. Preferably, one end of the drug storage cartridge located at the open end of the housing is an end for outputting the liquid medicine, and before the capping assembly is combined with the open end of the housing, the end of the drug storage cartridge is The sealing method is fixed with an isolation film. Preferably, the isolating membrane may be a microporous structure material with a high specific surface area, preferably, for example, an expanded polytetrafluoroethylene (Expanded Polytetrafluoroethylene, EPTFE) material having both air permeability and water resistance. The isolation membrane is used to isolate the medicinal liquid from the external environment before the capping assembly and the open end of the casing are joined. The air pressure of the cavity outside the isolation portion, that is, the open end of the casing, is the same. Furthermore, when the cover assembly and the open end of the casing are engaged, the air pressure inside the isolation membrane, that is, the internal pressure of the cylinder, and the air pressure outside the isolation portion, that is, the inner cavity pressure of the open end of the casing, are respectively consistent with the formed axial micro-gap. . On the one hand, regarding the gas circulation path in the present application: the gas inside the isolation membrane, that is, the gas inside the cylinder, can enter the outside of the isolation portion, that is, the inner cavity of the open end of the casing through the isolation membrane, and the gas entering the inner cavity of the open end of the casing passes through The small axial gap enters into the inner cavity defined by the outer peripheral surface of the cover assembly and at least one gasket. Since the second sealing element does not completely block the gas flowing from the axially small gap to the joint position, the gas flowing from the axial small gap to the joint position can pass through the inner ring part of the second sealing element to escape from the first The sealing element communicates to the external environment, thereby providing a vent path for gas flow inside the syringe pump housing. On the other hand, regarding the circulation path of the medicinal liquid in the present application: when the capping assembly and the open end of the casing are engaged, the needle tip provided on the end of the capping assembly pierces the isolation membrane, and The medicinal liquid enters the fluid passage provided in the capping assembly from the inside of the barrel through the needle tip, and further infuses medicinal liquid to the patient along the infusion device engaged with the other end of the fluid passage in the capping assembly.

According to a preferred embodiment of the present invention, the cover assembly further includes a second sealing element, the second sealing element and the first sealing element are arranged in parallel at the joint position, the second sealing element The element is of elastic design compared to the first sealing element. The second sealing element is configured to have a thickness greater than that of the first sealing element at its thickest point. The shape of the radial cross-section of the second sealing element is substantially L-shaped. Both the second sealing element and the first sealing element are similar in shape to the flange gasket, and are respectively sleeved at the annular groove. Preferably, the radial diameter of the second sealing element is substantially the same as the radial diameter of the first sealing element. The materials of the second sealing element and the first sealing element may both be microporous structure materials with high specific surface area. Preferably, the second sealing element can be made of nitrile rubber, polymer, plastic and other elastic materials. The second sealing element can be installed by being sleeved on the annular groove and fixedly connected or abutted with one end face of the first sealing element. Wherein, the end face of the second sealing element fixedly connected with the first sealing element is only the outer ring part is fixedly connected with the first sealing element, and the inner ring part is in abutting relationship with the first sealing element.

According to a preferred embodiment of the present invention, the inner end surface of the first part of the second sealing element in the radial direction is closer to the axis line of the second sealing element in the radial direction than the inner end surface of the second part. The inner end surface of the first portion extends inwardly longer than the inner end surface of the second portion and is placed in the annular groove. The inner end face of the second portion of relatively short size is placed outside the annular groove. The thickness of the second sealing element and the thickness of the first sealing element together form a small axial gap between the syringe pump housing and the cover assembly. Herein, further preferably, the axially small gap may also include a ventilation path for providing gas flow inside the syringe pump housing.

According to a preferred embodiment of the present invention, the second sealing element is subjected to an axial compressive force when the syringe pump housing is engaged with the capping assembly, so that its end corresponding to the inner end face of the first part is There is a non-tight fit with the first sealing element. The axial compressive force means that when the capping assembly is joined to the syringe pump casing, the end of the syringe pump casing and the end of the capping assembly are relatively close to each other, and the second sealing element located at the joint position is relatively close to each other. and/or a force exerted by the first sealing element with a tendency to compress. In the present invention, under the action of the axial compression force, the end of the second sealing element corresponding to the inner end face of the first part is in non-tight contact with the first sealing element. Applying a force with a compressive tendency to the two causes the two to be in non-close contact. The non-close contact referred to here includes the situation where they are in contact with each other but the interaction force is very weak, and also includes the situation where there is no contact point with each other at all. The realization of this function is that in the present application, the inner ring part on the second sealing element is in abutting relationship with the first sealing element, and the outer ring part of the sealing gasket and the first sealing element can be in a fixed relationship or abutting relationship relation. The second sealing element does not completely block the gas flowing from the small axial gap to the joint position, and the gas flowing from the axial small gap to the joint position can pass through the inner ring part of the second sealing element to seal from the first seal Elements flow out. With this function, the gasket achieves the effect of tightening and sealing between the syringe pump housing and the capping assembly, and at the same time provides a ventilation path for the gas flow inside the syringe pump housing.

A mobile medical device suitable for stroke patients, the mobile medical device comprising: a syringe pump device for delivering a drug from a drug storage cartridge to a user through an infusion cannula, and a support frame is pre-assembled on its outer wall; A frame, which is configured to be able to be stably assembled on the armrest of other equipment and for fixing the syringe pump device by means of the connection of its receiving portion to the support frame, wherein the armrest of the other equipment may refer to It is an armrest part with a flat upper end surface or an arc upper end surface and is applied to a wheelchair or an aviation seat. The mounting frame has at least one holding part. When the mounting frame is assembled to the armrest part of the equipment, the holding part is The invisible end face on the upper part and the invisible end face on the support part are respectively in at least partial contact with the equipment armrest part.

According to a preferred embodiment, the invisible end face on the holding portion and the invisible end face on the support portion have a rotational connection relationship with a limited maximum opening angle.

According to a preferred embodiment, at least one of the holding parts is configured to be able to move relative to the length direction of the supporting part, respectively, so as to adapt to the armrest parts of other equipment with different upper end surfaces.

Description of drawings

1 is a simplified structural schematic diagram of an assembling method of a mobile medical device provided by the present invention;

2 is a simplified cross-sectional structural schematic diagram of the first sealing element and the second sealing element provided by the present invention;

3 is a simplified cross-sectional structural schematic diagram of the open end of the housing of the mobile medical device provided by the present invention; and

FIG. 4 is a simplified structural schematic diagram of the installation method for installing the mobile medical device on the armrest provided by the present invention.

List of reference signs

1: Syringe pump housing 2: Housing open end 3: Reservoir cartridge

4: Pump drive 5: Cover assembly 6: Axial micro clearance

7: First sealing element 8: Inside end face 9: Annular groove

10: Second sealing element 11: Inside end face of first part 12: Inside end face of second part

13: Controller unit 14: Syringe pump unit 15: Support frame

16: Mounting bracket 17: Armrest 18: Upper end surface

19: Holding part 20: Supporting part

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a simplified schematic diagram of the mobile medical device proposed by the present invention before it is assembled. The mobile medical device mainly includes a controller device 13 and a syringe pump device 14 . In the present invention, the controller device 13 is adapted to the shape of the syringe pump device 14 , and the two can be installed or disassembled in a detachable manner to replace the new syringe pump device 14 . Wherein, the syringe pump device 14 is obtained by assembling the two main components of the syringe pump housing 1 and the cover assembly 5 .

The specific process of applying the mobile medical device proposed in the present application to the aviation environment to provide pressure balance when the internal pressure of the syringe pump device 14 is different from the pressure in the cabin will be described as follows:

First, as shown in FIG. 1 , before the patient administers medicine, the mobile medical device includes a controller device 13 , a syringe pump housing 1 and a capping assembly 5 , which are provided separately. Then, the cover assembly 5 is assembled to the syringe pump housing 1 to form the syringe pump device 14 . The two ends of the capping assembly 5 are respectively communicated with the liquid medicine inside the storage cartridge 3 and the infusion equipment/infusion tube. The syringe pump unit 14 is assembled to the controller unit 13 . The controller device 13 is provided with an operation interface/display device for direct operation by the user, so that the user can directly control the operation parameters of the syringe pump in real time and accurately through the operation interface.

When the capping assembly 5 is joined to the syringe pump casing 1 along the casing open end 2 of the syringe pump casing 1 , the liquid guiding passage located inside the capping assembly 5 communicates with the inside of the drug storage cartridge 3 . And, as shown in FIG. 3 , the first sealing element 7 and the second sealing element 10 placed in the annular groove at the end of the cover assembly 5 are surrounded by the outer walls of the ends of the cover assembly 5 on the left and right sides and the syringe pump casing The outer wall of the open end of the body 1 is clamped.

As shown in FIG. 2 , for a portion of the gasket/outer ring portion of the second sealing element 10 that is outside the annular groove, it is subjected to an axial compressive force when the syringe pump housing 1 is engaged with the cap assembly 5 .

Since the inner ring part of the second sealing element 10 is in abutting relationship with the first sealing element 7 in the present application, the outer ring part of the sealing gasket and the first sealing element 7 may be in a fixed relationship or abutting relationship . Therefore, under the condition that the outer ring portion is compressed and the inner ring portion is not compressed, the relatively movable inner ring portion of the sealing gasket is slightly lifted to the side.

Therefore, under the action of the axial compressive force, the end of the second sealing element 10 corresponding to the inner end surface 11 of the first part and the first sealing element 7 are in non-tight fit. Applying a force with a compressive tendency to the two causes the two to be in non-close contact. The non-close contact referred to here includes the situation where they are in contact with each other but the interaction force is very weak, and also includes the situation where there is no contact point with each other at all. Under this setting, one end of the inner ring part is slightly raised, the second sealing element 10 cannot completely block the gas flowing from the axially small gap to the joint position, and the gas flowing from the axial small gap to the joint position can be Circulation out from the first sealing element 7 passes through the inner ring portion of the second sealing element 10 . With this function, the gasket achieves the tightening and sealing effect between the syringe pump housing 1 and the capping assembly 5 , and at the same time provides a ventilation path for the gas flow inside the syringe pump housing 1 .

Further, the gas inside the axially small gap is the same as the gas pressure inside the syringe pump housing 1 . The gas in this part can pass through the annular groove in sequence, and enter the inside of the first sealing element 7 from the inner end face 8 of the first sealing element 7 . Based on the microporous structure with a high specific surface in the first sealing element 7 , the gas is circulated to the outside of the syringe pump housing 1 in a manner to prevent the entry of external liquid. In this way, the mobile medical device can provide pressure balance when the internal pressure of the syringe pump device 14 is different from the pressure in the cabin when the mobile medical device is applied to the aviation environment.

According to a preferred embodiment, as shown in FIG. 4 , in order to realize the quick installation and use of the syringe pump device 14 on a wheelchair or in an aviation environment, the present invention also proposes a device that can be adapted to a wheelchair or an aviation seat. The handrail part 17 of the mobile medical device. Generally, the armrest portion 17 on a wheelchair has a flat upper end surface 18 , while the armrest portion 17 of an airline seat has an arcuate upper end surface 18 . Installation of the syringe pump assembly 14 requires adjustability of the height at which it is placed and relative stability.

In the present invention, the syringe pump device 14 pre-assembled with the support frame 15 and the mounting bracket 16 arranged separately are provided, and the mounting bracket 16 is fixed on the handrail part 17 of other equipment, so that the syringe pump device 14 can be installed on the handrail part 17 The installation provides a connection point, so it can achieve quick installation and use; the present invention also sets the invisible end face on the holding part 19 and the invisible end face on the supporting part 20, respectively, and the two end faces adjacent to the equipment armrest 17 At least partially in contact with each other, further stable support of the syringe pump device 14 on the armrest 17 is achieved.

Before the mobile medical device is used, the mobile medical device is composed of a syringe pump device 14 and a mounting frame 16 which are provided separately from each other.

The syringe pump device 14 is used to deliver the drug from the cartridge 3 to the user through an infusion cannula, and a support frame 15 is pre-assembled on its outer wall.

The support frame 15 can be a structure similar to a telescopic rod, and its free end can be pulled out or retracted from the outer wall of the syringe pump device 14 . The arrangement of the support frame 15 makes the height of the syringe pump device 14 adjustable.

Before using the mobile medical device, the mounting frame 16 has a holding part 19 and a supporting part 20 hinged to each other, and the holding part 19 and the supporting part 20 are both plate-like structures.

The receiving portion 20 is in a long plate shape adapted to the armrest portion 17 , and the holding portion 19 has a predetermined dimension shorter than the receiving portion 20 . Since the hinge between the two is a recoverable elastic connection, the included angle between the two is close to 0° when no external force is applied, and the maximum included angle between the two is 90° during use.

The receiving portion 20 is a member for connecting the support frame 15 for contacting the side end surface of the armrest portion 17 , and the holding portion 19 is for holding the receiving portion 20 for abutting against the upper end surface 18 of the armrest portion 17 . Stable parts.

For the realization of the function of the mobile medical device of the present application being adapted to the armrest portion 17 on a wheelchair or an aviation seat, the holding portion 19 is of a shorter and predeterminable size than the supporting portion 20 . The holding parts 19 can be placed on both sides of the armrest part 17 to provide stable support to the support part 20. For the wheelchair armrest part 17, the holding parts 19 can also be placed in the middle of the armrest part 17 to provide stable support to the support part 20. For the armrest portion 17 of the airline seat.

Then, first assemble the mounting bracket 16 to the armrest 17 of other equipment. During this process:

For the wheelchair armrest 17 with a flat upper end surface 18, a cushion for providing comfort is usually provided on the wheelchair armrest 17, and the two ends of the cushion respectively retain a part of the armrest with a flat upper end surface 18 rather than a completely curved surface. .

The mounting bracket 16 is provided with an annular adjustment band whose two ends are respectively fixed to the invisible end face of the holding portion 19 and the invisible end face of the support portion 20 . The adjusting belt has certain elasticity and can adjust the length of its annular belt body.

In this way, the holding part 19 and the supporting part 20 which are closed and closely attached to each other are first unfolded, and at least one annular adjusting band is put on the armrest part 17 from the open end of the armrest part 17 . At this time, the invisible end surface of the holding part 19 abuts on the upper end surface 18 of the armrest part 17 , and the invisible end surface of the receiving part 20 abuts the side end surface outside the armrest part 17 . The annular adjusting belt is further shortened, so that the fixing effect between the above-mentioned invisible end face and the end face of the armrest portion 17 is enhanced. The assembly of the mounting bracket 16 is thus completed.

When the mobile medical device needs to be used, the support frame 15 in the stored state on the outer wall of the syringe pump device 14 is unfolded and extended. When extending to the required length, the current length of the support frame 15 is fixed, the syringe pump device 14 is located at the upper end of the support frame 15, and the support frame 15 only needs to be installed on the armrest 17 of other equipment already equipped with the mounting frame 16, and the support The lower end of the frame 15 is quickly connected to the mounting frame 16 in a detachable connection manner, so that the mobile medical device is stably installed on the armrest 17 of other equipment.

It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also belong to the disclosure scope of the present invention and fall within the scope of the present invention. within the scope of protection of the invention. It should be understood by those skilled in the art that the description of the present invention and the accompanying drawings are illustrative rather than limiting to the claims. The protection scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. A mobile medical device suitable for stroke patients, the mobile medical device comprising: a syringe pump housing (1) having an open end of the housing (2) and a cartridge (3) for storing the drug; a pump drive (4) configured in the syringe pump housing (1) for dispensing the drug in the cartridge (3); A capping assembly (5) fitted on the syringe pump housing (1) by engaging with the housing open end (2) for the medication to be dispensed from the cartridge (3) delivered to the outside of the syringe pump housing (1), Wherein, a small axial gap (6) is formed between the outer wall of the end of the cover assembly (5) assembled on the syringe pump housing (1) and the inner wall of the syringe pump housing (1), It is characterized by, The capping assembly (5) has a first sealing element (7), and the first sealing element (7) is located between the syringe pump housing (1) and the capping assembly (5) that are in contact with each other. At the joint position between and communicate with the axial micro-gap (6). 2. The mobile medical device according to claim 1, characterized in that the first sealing element (7) has an inner side in a radial direction for providing a ventilation path for gas flow inside the syringe pump housing (1) end face (8). 3. The mobile medical device according to claim 2, characterized in that the inner end surface (8) of the first sealing element (7) surrounds the end surface (8) opened on the outer wall of the end of the cover assembly (5) on the annular groove (9). 4. The mobile medical device according to claim 3, wherein the first sealing element (7) at least comprises a microporous structure material with a high specific surface area. 5. The mobile medical device according to claim 4, characterized in that, the capping assembly (5) further comprises a second sealing element (10), the second sealing element (10) being connected to the first sealing element (10). Sealing elements (7) are arranged side by side at the engagement point, the second sealing element (10) being elastically formed in comparison to the first sealing element (7). 6 . The mobile medical device according to claim 5 , wherein the inner end surface ( 11 ) of the first part of the second sealing element ( 10 ) in the radial direction is more radially relative to the inner end surface ( 12 ) of the second part. 7 . Close to the axis of the second sealing element (10). 7. Mobile medical device according to claim 6, characterized in that the second sealing element (10) is shafted when the syringe pump housing (1) is engaged with the capping assembly (5) The end portion corresponding to the inner end surface (11) of the first part and the first sealing element (7) are in non-tight contact due to the compressive force. 8. A mobile medical device suitable for stroke patients, the mobile medical device comprising: a syringe pump device (14) for delivering the drug from the cartridge (3) to the user through an infusion cannula and a support frame (15) pre-assembled on its outer wall; A mounting bracket (16), which is configured to be able to be stably assembled on the armrest portion (17) of other equipment and is used to fix the syringe pump device by means of its receiving portion (20) being connected to the support frame (15) (14), Wherein, the armrest portion (17) of the other equipment may refer to the armrest portion (17) with a flat upper end surface or an arc-shaped upper end surface and applied to a wheelchair or an aviation seat, It is characterized by, The mounting bracket (16) has at least one holding part (19), and when the mounting bracket (16) is assembled on the equipment armrest part (17), the invisible end face on the holding part (19) and the supporting part (20) ), respectively, and the equipment armrests (17) are at least partially in contact with each other. 9. The mobile medical device according to claim 8, wherein the invisible end face on the holding part (19) and the invisible end face on the supporting part (20) have a limited maximum opening angle. Rotate the connection. 10. The mobile medical device according to claim 9, characterized in that, at least one holding part (19) is configured to be able to move relative to the length direction of the supporting part (20) respectively to adapt to the armrests of other equipment with different upper end surfaces Section (17).

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