A new pressurized injection device

Abstract

The utility model provides a novel pressurized injection device, and the syringe can be used for injecting pressurized liquid, the fixed seat is provided on the syringe control module, the movable seat is movably arranged on the syringe control module, the injection cylinder of syringe is fixedly arranged on the fixed seat, the piston rod of syringe is fixedly arranged on the movable seat, and the power source part of syringe control module controls the reciprocating movement of movable seat, thereby controlling the reciprocating movement of the piston rod of syringe, and further comprising detection module for detecting the push -and -pull of piston rod. The output port of syringe is connected with pressurized valve assembly control module, and the pressurized valve assembly control module comprises at least two output ports, the communication between the output port of syringe and different output ports is switched through pressurized valve assembly control module, the output or extraction of liquid from different output ports can be realized. The utility model can replace the doctor to execute balloon pressurization in radiation environment, and can make the complicated valve control and syringe bolus operation automation.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a novel pressurized injection device. Background Technology

[0002] Minimally invasive interventional therapy is a major treatment method for cardiovascular and cerebrovascular diseases. Guided by fluoroscopic imaging equipment, interventional instruments are used to diagnose and treat diseases through physiological cavities. Compared with traditional surgery, it has significant advantages such as better efficacy, higher safety, smaller incisions, and shorter postoperative recovery time.

[0003] The main steps in vascular interventional surgery include femoral / radial artery puncture, coordinated advancement of the guidewire and angiography catheter, digital subtraction angiography (DSA), coordinated advancement of the treatment guidewire and balloon catheter, and placement of the vascular stent. The coordinated advancement of the guidewire, catheter, and balloon catheter is the most time-consuming step and requires X-ray-guided image navigation. Currently, vascular interventional surgery is usually performed manually by a surgeon. During the procedure, because DSA emits X-rays, the surgeon needs to wear a heavy lead apron, which leads to a rapid decline in physical strength, reduced attention, and decreased stability, resulting in decreased operational precision and an increased risk of accidents such as endothelial damage, vascular perforation, and rupture due to improper pushing force, endangering the patient's life. Furthermore, long-term wearing of lead aprons can damage the surgeon's spine. Secondly, the cumulative damage from long-term ionizing radiation significantly increases the surgeon's risk of leukemia, cancer, and acute cataracts. Therefore, to protect the health of surgeons and ensure surgical quality, research and development of interventional surgical robots are increasing, and more and more robots are being used clinically.

[0004] In cardiovascular interventional surgery, balloon inflators are essential instruments for using balloon dilation catheters. When the balloon dilation catheter reaches a narrowed area such as a blood vessel or valve, the balloon inflator is used to pressurize the catheter, causing it to expand and dilate, thus achieving the goal of vascular dilation and interventional treatment. Most existing balloon inflators use a syringe-type inflator, which is difficult to operate with one hand and requires a separate surgeon. This surgeon needs to work closely with the surgeon, requiring a high level of technical skill. Furthermore, the surgeon is exposed to radiation exposure during the procedure. Therefore, a pressurized injection device is needed to replace the surgeon in performing balloon inflator operations in a radiation-filled environment, thus avoiding radiation damage to the surgeon. Summary of the Invention

[0005] The purpose of this invention is to provide a novel pressure injection device to address existing technical deficiencies and unmet technical requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel pressurized injection device includes a syringe and a syringe control module. The syringe is used to inject pressurized liquid. The syringe control module is provided with a fixed seat and a movable seat is movably disposed on the syringe control module. The syringe barrel is fixedly disposed on the fixed seat, and the syringe piston rod is fixedly disposed on the movable seat. The power source of the syringe control module controls the movable seat to reciprocate, thereby controlling the reciprocating movement of the syringe piston rod. The device also includes a detection module for detecting the push-pull force of the piston rod.

[0008] Preferably, the fixed seat is fixedly mounted on the syringe control module. The syringe control module is provided with a linear motion mechanism and a push seat. The linear motion mechanism drives the push seat to reciprocate linearly along the axial direction of the piston rod. The detection module includes a force sensor. The moving seat is fixedly connected to the push seat through the force sensor. The detection axis of the force sensor is parallel to the axial direction of the piston rod. When the push seat drives the moving seat to move, the force sensor can detect the magnitude of the pushing and pulling force of the syringe piston rod.

[0009] Preferably, it also includes an isolation membrane, which has a pocket-shaped isolation portion that covers and isolates the power source portion of the pressurized injection device.

[0010] Preferably, the pocket-shaped isolation portion includes a first isolation cover and a second isolation cover fixedly connected to the isolation membrane. A first pressure cap is connected to the first isolation cover, and a second pressure cap is connected to the second isolation cover. The first isolation cover is fitted onto a fixed base, and the second isolation cover is fitted onto a movable base. The limiting structure of the syringe barrel is placed inside the first isolation cover. The first pressure cap presses the limiting structure of the syringe barrel inside the first isolation cover to prevent the syringe barrel from moving. When the limiting structure of the syringe piston rod is placed inside the second isolation cover, the second pressure cap can press the limiting structure of the syringe piston rod inside the second isolation cover.

[0011] Preferably, the fixed seat and the movable seat are respectively provided with a protruding limiting structure, and the first isolation cover and the second isolation cover are respectively provided with a protruding shell limiting structure. The inner surface of the shell limiting structure is adapted to the shape of the protruding limiting structure of the fixed seat and the movable seat, and the outer surface of the shell limiting structure is adapted to the shape of the limiting structure on the syringe barrel and the piston rod of the syringe.

[0012] Preferably, the protruding limiting structure and the shell limiting structure are two concave shapes distributed on both sides, and the groove portions of the two concave shapes are arranged opposite to each other.

[0013] Preferably, the syringe control module is provided with a base and a linear guide structure. The fixed seat and the movable seat are slidably disposed on the linear guide structure. The detection module includes a force sensor. The fixed seat is connected to the base through the force sensor. The detection axis of the force sensor is parallel to the axis of the piston rod. When the movable seat drives the piston rod of the syringe to move, the force sensor can detect the push-pull force transmitted by the piston rod of the syringe to the syringe barrel, thereby detecting the push-pull force of the piston rod of the syringe.

[0014] Preferably, the linear guide structure consists of two parallel guide rails mounted on the base; the fixed seat and the movable seat are respectively mounted on the guide rails via sliders.

[0015] Preferably, the first output port of the syringe is connected to a pressure valve assembly control module, which includes at least two second output ports. The pressure valve assembly control module switches the connection between the first output port of the syringe and different second output ports to realize the output or inflow of liquid from different second output ports.

[0016] Preferably, the pressurizing valve assembly control module includes a pressurizing valve assembly and a pressurizing valve control host. The pressurizing valve assembly has a main passage and four second output ports. The pressurizing valve assembly is equipped with two valves, which respectively control the connection and closure of the four second output ports and the main passage. The main passage is connected to the first output port of the syringe.

[0017] The valve is a rotary valve structure. Each rotary valve structure controls the connection and closure of the main passage and four second output ports. The pressurized valve control host is equipped with a corresponding number of valve drive seats. Each valve drive seat drives the corresponding rotary valve structure to rotate, thereby switching the different passages of the pressurized valve assembly. The rotary valve structure is a three-way valve structure.

[0018] One of the four second output ports is connected to a drug supply device for supplying drug to the pressurized injection device.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The pressurized injection device can replace doctors in performing balloon inflatation in a radiation environment. It can also control different pathways through the pressurized valve assembly control module to achieve the functions of blood drawing or drug injection (such as contrast agents, heparinized saline, nitroglycerin, embolization agents, etc.), avoiding radiation damage to doctors. In addition, the pressurized injection device can automate complex valve control and syringe injection operations, so that a surgeon can remotely control the slave device to deliver guidewires and catheters while performing balloon inflatation, avoiding the situation of poor coordination between different doctors.

[0021] 2. The syringe control module of this utility model can realize automated injection, pressurize the balloon, and detect the pushing and pulling force of the syringe piston rod through the force sensor. It can accurately control the pressure and expansion degree of the balloon. The operation is simple and controllable, and will not cause the balloon to rupture due to excessive pressure or fail to open blood vessels or stents due to insufficient pressure.

[0022] 3. The pocket-shaped isolation part of this utility model is used to cover and isolate the power source part of the pressurized injection device, ensuring a reliable isolation effect. This allows only a disposable syringe to be installed before the operation begins, effectively improving work efficiency and ensuring the isolation between the sterile and the sterile environment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of two sets of pressurized injection devices in Embodiment 1 of this utility model (excluding the pocket-shaped isolation part);

[0024] Figure 2 This is a schematic diagram of the structure of two sets of pressurized injection devices (including a pocket-shaped isolation part) in Embodiment 1 of this utility model;

[0025] Figure 3 This is one of the structural schematic diagrams of the pressurized injection device according to Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the pressurized injection device of Embodiment 1 of this utility model after being isolated by the hood-shaped isolation part;

[0027] Figure 5 This is a second schematic diagram of the pressurized injection device according to Embodiment 1 of this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the fixed base connected to the base via a force sensor in Embodiment 1 of this utility model;

[0029] Figure 7 This is a schematic diagram of the syringe clamping and isolating assembly according to Embodiment 1 of this utility model;

[0030] Figure 8 This is a schematic diagram of the syringe clamping and isolating assembly of Embodiment 1 of this utility model with the first and second pressure caps removed.

[0031] Figure 9 This is a schematic diagram of the structure of the first or second isolation cover of Embodiment 1 of this utility model;

[0032] Figure 10 This is a schematic diagram of the structure of the fixed base or movable base of Embodiment 1 of this utility model;

[0033] Figure 11This is a schematic diagram of the structure of a set of pressurized injection devices and valve assemblies in Embodiment 2 of this utility model;

[0034] Figure 12 This is one of the structural schematic diagrams of the pressurized injection device and valve assembly in Embodiment 2 of this utility model;

[0035] Figure 13 This is one of the structural schematic diagrams of the pressurized injection device and valve assembly in Embodiment 2 of this utility model;

[0036] Figure 14 This is a schematic diagram of the valve assembly in Embodiment 2 of this utility model. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Example 1

[0041] like Figure 1 and 2As shown, an interventional robot slave device has a linear track assembly arranged at an angle downwards on the upper part of the operating table. The upper part of the operating table or the upper or lower side of the linear track assembly is equipped with a drug injection module 102207 for injecting contrast agents or heparin saline. The upper part of the operating table or the upper or lower side of the linear track assembly is equipped with a pressurization injection device 102208 for pressurizing the balloon. All linear track assemblies are mounted on an adjusting arm.

[0042] The linear track assembly includes a first linear track assembly 10270101. The interventional robot's end-effector also includes a first delivery kit, a second delivery kit, a first conduit, a second conduit, and a bifurcation valve. The first delivery kit includes a first port support mechanism 10271 and a first rotary delivery mechanism 10272 positioned behind the first port support mechanism 10271. The second delivery kit includes a second port control mechanism 10273 positioned at the front end and a second rotary delivery mechanism or second delivery mechanism 10274101 positioned at the rear end. The first rotary delivery mechanism 10272 and the second port control mechanism 10273 are synchronously moved on the first linear track assembly 10270101. The first conduit is fixed... The first catheter is fixed on the first port support mechanism 10271. A hemostatic valve is provided at the rear end of the first catheter. The first port support mechanism 10271 is fixed at the front end of the first linear track group 10270101, or the first port support mechanism 10271 is installed on a fixed frame outside the linear track group. The first rotary delivery mechanism 10272 is provided with a first connecting part. The first connecting part is locked with the second catheter. The first rotary delivery mechanism 10272 can drive the second catheter to perform rotary delivery movement through the first connecting part. The bifurcation valve is installed on the second port control mechanism 10273. The front end of the second catheter is inserted into the first catheter. The rear end of the second catheter is directly connected to the rotatable part of the front end of the bifurcation valve or connected through an internal connecting tube.

[0043] It also includes a drug injection module 102207, which can be used to inject one or a combination of contrast agents, heparin saline, and nitroglycerin. The output port of the drug injection module 102207 is connected to a branch of a bifurcation valve.

[0044] The pressurized injection device 102208 is connected to the tail end of the balloon catheter or microcatheter locked by the second delivery mechanism 10274101, for pressurizing the balloon or for injecting an embolic agent through the microcatheter.

[0045] The first catheter is a sheath, and the second catheter is a guiding catheter.

[0046] It also includes a third interventional consumable. The second connecting part of the second delivery mechanism 10274101 or the second rotary delivery mechanism is locked with the third interventional consumable. The second delivery mechanism 10274101 or the second rotary delivery mechanism drives the third interventional consumable to perform axial delivery or rotary delivery. The third interventional consumable is a third catheter or a first guidewire. The third catheter is a first balloon catheter or a first microcatheter.

[0047] When the third interventional consumable is the third catheter, the second delivery kit includes a second port control mechanism 10273 placed at the front end and a second delivery mechanism 10274101 or a second rotary delivery mechanism placed at the rear end. The second connecting part of the second delivery mechanism 10274101 or the second rotary delivery mechanism is locked with the tail end or body of the third catheter, or the second connecting part is locked with the tubing connected to the rear end of the third catheter. The second delivery mechanism 10274101 or the second rotary delivery mechanism drives the third catheter to perform axial delivery movement or rotary delivery movement.

[0048] When the third catheter is the first balloon catheter and the first balloon catheter is a Monorail balloon catheter, the output port of the pressurized injection device 102208 is connected to the rear end of the Monorail balloon catheter and can be used to inject pressurized liquid, thereby inflating the balloon at the front end of the Monorail balloon catheter.

[0049] When the third catheter is the first balloon catheter and the first balloon catheter is an OTW balloon catheter, the output port of the pressurized injection device 102208 is connected to the tail end interface of the OTW balloon catheter, and can be used to inject pressurized liquid, thereby inflating the balloon at the front end of the OTW balloon catheter. The OTW balloon catheter has a through third tube on its central axis.

[0050] When the third catheter is the first microcatheter, the microcatheter has a through third channel on its central axis, and the output port of the pressurized injection device 102208 is connected to the tail end interface of the first microcatheter, which can be used to inject drugs, such as embolic agents.

[0051] When the interventional surgical robot also includes a third delivery kit, the interventional surgical robot also includes a second linear track group 10270102. The third delivery kit includes a third port support mechanism and a third rotary delivery mechanism 10276. The third rotary delivery mechanism can reciprocate along the second linear track group. A first branch module 1027303 is provided behind the second port control mechanism 10273. One branch of the first branch module 1027303 is connected to the third port support mechanism through a first track changing part. The third rotary delivery mechanism 10276 is provided with a third connecting part. The third connecting part can lock the fourth interventional consumable. The third rotary delivery mechanism 10276 can drive the fourth interventional consumable to perform a rotary delivery movement. The fourth interventional consumable is a first guidewire. The front end of the fourth interventional consumable passes through the first track changing part and the first branch module 1027303 into the second catheter.

[0052] The fourth interventional consumable is a fourth catheter, which can be a second balloon catheter or a first microcatheter. When the fourth catheter is a second balloon catheter, two sets of pressurization injection devices 102208 for pressurizing the balloon are installed on the upper part of the operating table or the upper or lower part of the linear track assembly; the output port of one set of pressurization injection devices 102208 is connected to the tail end interface of the first balloon catheter and can be used to inject pressurized liquid, thereby inflating the balloon at the front end of the first balloon catheter; the output port of the other set of pressurization injection devices 102208 is connected to the tail end interface of the second balloon catheter and can be used to inject pressurized liquid, thereby inflating the balloon at the front end of the second balloon catheter.

[0053] like Figure 2 and Figure 4 As shown, it also includes an isolation membrane, the lower side of which is provided with a pocket-shaped isolation part 107. The isolation membrane covers and isolates the entire interventional surgical robot, and the pocket-shaped isolation part 107 is used to cover and isolate the power source part of the pressurized injection device 102208.

[0054] like Figures 3-10As shown, the pressurized injection device 102208 includes a syringe control module 10220801 and a syringe 10220802. The syringe is used to inject pressurized liquid. A fixed base 10220803 is fixedly mounted on the syringe control module 10220801, and a movable base 10220804 is movably mounted on the syringe control module 10220801. The limiting structure of the syringe barrel of the syringe 10220802 is fixedly mounted on the fixed base 10220803. The piston rod limiting structure of syringe 10220802 is fixed on the movable seat 10220804. The power source of syringe control module 10220801 controls the movable seat 10220804 to reciprocate, thereby controlling the piston rod of syringe 10220802 to reciprocate. It also includes a detection module for detecting the pushing and pulling force of the piston rod. The fixed seat 10220803 and the movable seat 10220804 are provided with a protruding limiting structure 10220805.

[0055] like Figure 6 As shown, the force sensor is configured as follows: The syringe control module has a base 1 and a linear guide structure 2. The fixed seat 10220803 and the movable seat 10220804 are slidably mounted on the linear guide structure 2. The detection module includes a force sensor 10220806. The fixed seat 10220803 is connected to the base 1 through the force sensor 10220806. The detection axis of the force sensor 10220806 is parallel to the axis of the piston rod. When the movable seat 10220804 drives the piston rod of the syringe to move, the force sensor 10220806 can detect the push-pull force transmitted from the piston rod of the syringe to the syringe barrel, thereby detecting the push-pull force of the syringe piston rod. The linear guide structure consists of two parallel guide rails mounted on the base. The fixed seat and the movable seat are respectively mounted on the guide rails via sliders.

[0056] As an alternative, the syringe control module includes a linear motion mechanism and a pusher seat. The linear motion mechanism drives the pusher seat to reciprocate linearly along the piston rod axis. The detection module includes a force sensor, and the moving seat is fixedly connected to the pusher seat via the force sensor. The detection axis of the force sensor is parallel to the piston rod axis. When the pusher seat drives the moving seat, the force sensor can detect the magnitude of the push-pull force on the syringe piston rod. The linear motion mechanism can be one or more combinations of a cam structure, a crank-slider structure, a connecting rod structure, a gear and rack structure, and a lead screw and nut structure. In this embodiment, the linear motion mechanism adopts a lead screw and nut structure.

[0057] The pocket-shaped isolation portion 107 is equipped with a syringe clamping isolation assembly 10701. The syringe clamping isolation assembly 10701 includes a first isolation cover 1070101 and a second isolation cover 1070102 fixedly connected to the isolation membrane 1. A first pressure cap 1070103 is connected to the first isolation cover 1070101, and a second pressure cap 1070104 is connected to the second isolation cover 1070102. The first isolation cover 1070101 is fitted onto the fixed base 10220803, and the second isolation cover 1070102 is fitted onto the movable base 10220804. When the limiting structure of the syringe barrel of syringe 10220802 is placed inside the first isolation cover 1070101, the first pressure cap 1070103 can press the limiting structure of the syringe barrel of syringe 10220802 tightly inside the first isolation cover 1070101 to prevent the syringe barrel of syringe 10220802 from moving. When the limiting structure of the piston rod of syringe 10220802 is placed inside the second isolation cover 1070102, the second pressure cap 1070104 can press the limiting structure of the piston rod of syringe 10220802 tightly inside the second isolation cover 1070102. The limiting structure of the syringe barrel can be a limiting block fixedly or integrally mounted on the syringe barrel, and the limiting structure of the piston rod can be a limiting block fixedly or integrally mounted on the piston rod.

[0058] The first isolation cover 1070101 and the second isolation cover 1070102 are respectively provided with a protruding shell limiting structure 1070105. The inner surface of the shell limiting structure 1070105 is adapted to the shape of the protruding limiting structure 10220805 of the fixed seat 10220803 and the movable seat 10220804, respectively. The outer surface of the shell limiting structure 1070105 is adapted to the shape of the limiting structure on the syringe barrel of the syringe 10220802 and the piston rod of the syringe 10220802, respectively.

[0059] The protruding limiting structure 10220805 and the shell limiting structure 1070105 are two concave shapes distributed on both sides, and the groove portions of the two concave shapes are arranged opposite each other.

[0060] Example 2

[0061] The parts of this embodiment that are structurally identical to those in Embodiment 1 will not be described again. The differences are as follows:

[0062] The syringe's first output port is connected to a pressure valve assembly control module, which includes at least two second output ports. By switching the connection between the syringe's first output port and different second output ports through the pressure valve assembly control module, liquid can be output or drawn in from different second output ports.

[0063] The pressurization valve assembly control module includes a pressurization valve assembly and a pressurization valve control host. The pressurization valve assembly has a main passage and four second output ports. The pressurization valve assembly is equipped with two valves, which control the connection and closure of the four second output ports and the main passage, respectively. The main passage is connected to the first output port of the syringe.

[0064] The valve is a rotary valve structure. Each rotary valve structure controls the connection and closure of the main passage and four second output ports. The pressurized valve control host is equipped with a corresponding number of valve drive seats. Each valve drive seat drives the corresponding rotary valve structure to rotate, thereby switching the different passages of the pressurized valve assembly. The rotary valve structure is a three-way valve structure.

[0065] like Figures 11-14 As shown, when the fourth catheter is the second balloon catheter, a set of pressurizing injection devices 102208 for pressurizing the balloon is installed on the upper part of the operating table or the upper or lower part of the linear track assembly; the pressurizing injection device includes a pressurizing valve assembly control module 104, the output port of the syringe of the pressurizing injection device is connected to the pressurizing valve assembly control module, the pressurizing valve assembly control module is connected to the tail end interface of the first balloon catheter and the second balloon catheter respectively, and the connection between the output port of the syringe of the pressurizing injection device and different balloon catheters is switched by the pressurizing valve assembly control module, which can be used to inject pressurized liquid, thereby inflating the balloon at the front end of the first balloon catheter or the second balloon catheter.

[0066] The pressurized valve assembly control module includes a pressurized valve assembly 10401 and a pressurized valve control host. The pressurized valve assembly has a main passage 10403 and at least two pressurized ports 10404. The pressurized valve assembly is equipped with two valves, which control the connection and closure of the pressurized ports 10404 and the main passage 10403 respectively. The main passage 10403 is connected to the output port of the syringe of the pressurized injection device.

[0067] The valve is a rotary valve structure, and the pressure valve assembly is also provided with at least two branch ports 10402. Each rotary valve structure controls the connection and closure of the main passage 10403 with a pressure port 10404 or a branch port 10402. The pressure valve control host is provided with a corresponding number of valve drive seats. Each valve drive seat drives the rotary valve structure to rotate, thereby switching the different passages of the pressure valve assembly. The rotary valve structure is a three-way valve structure.

[0068] One of the four second output ports is connected to a drug supply device for supplying drug to the pressurized injection device.

[0069] During pressurization, a medication bag 10405 is connected to one branch port of the pressurization valve assembly, and a balloon catheter is connected to one pressurization port of the same assembly. First, the main pathway is connected to the branch port via a rotary valve mechanism, drawing the medication from the medication bag 10405 into the syringe. Then, the valve drive seat rotates the rotary valve mechanism, connecting the main pathway to the pressurization port, thus moving the syringe piston forward to inject medication into the balloon catheter. This method can also be used to inject other drugs, such as contrast agents, heparinized saline, nitroglycerin, and embolic agents, with reference to the above method.

[0070] When blood is drawn, a waste bag is connected to one of the branches of the pressure valve assembly, and an aspiration tube is connected to one of the pressure ports of the pressure valve assembly. First, the main passage is connected to the pressure port by the rotary valve structure, and the blood is drawn into the syringe. Then, the rotary valve structure is rotated by the valve drive seat to connect the main passage to the branch port, and the piston rod of the syringe is moved forward to inject the blood in the syringe into the waste bag.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A novel pressure injection device, characterized in that, The device includes a syringe and a syringe control module. The syringe is used to inject pressurized liquid. The syringe control module is provided with a fixed seat and a movable seat. The syringe barrel is fixedly mounted on the fixed seat, and the syringe piston rod is fixedly mounted on the movable seat. The power source of the syringe control module controls the movable seat to move back and forth, thereby controlling the reciprocating movement of the syringe piston rod. The device also includes a detection module for detecting the push-pull force of the piston rod.

2. The novel pressure injection device according to claim 1, characterized in that, The fixed seat is fixedly mounted on the syringe control module. The syringe control module is equipped with a linear motion mechanism and a push seat. The linear motion mechanism drives the push seat to reciprocate linearly along the axial direction of the piston rod. The detection module includes a force sensor. The moving seat is fixedly connected to the push seat through the force sensor. The detection axis of the force sensor is parallel to the axial direction of the piston rod. When the push seat drives the moving seat to move, the force sensor can detect the magnitude of the pushing and pulling force of the syringe piston rod.

3. The novel pressure injection device according to claim 1, characterized in that, It also includes an isolation membrane, which has a pocket-shaped isolation part that covers and isolates the power source part of the pressurized injection device.

4. The novel pressure injection device according to claim 3, characterized in that, The pocket-shaped isolation section includes a first isolation cover and a second isolation cover fixedly connected to the isolation membrane. A first pressure cap is connected to the first isolation cover, and a second pressure cap is connected to the second isolation cover. The first isolation cover is covered on a fixed base, and the second isolation cover is covered on a movable base. The limiting structure of the syringe barrel is placed inside the first isolation cover. The first pressure cap presses the limiting structure of the syringe barrel inside the first isolation cover to prevent the syringe barrel from moving. When the limiting structure of the syringe piston rod is placed inside the second isolation cover, the second pressure cap can press the limiting structure of the syringe piston rod inside the second isolation cover.

5. A novel pressure injection device according to claim 4, characterized in that, The fixed seat and the movable seat are respectively provided with a protruding limiting structure. The first isolation cover and the second isolation cover are respectively provided with a protruding shell limiting structure. The inner surface of the shell limiting structure is adapted to the shape of the protruding limiting structure of the fixed seat and the movable seat, respectively. The outer surface of the shell limiting structure is adapted to the shape of the limiting structure on the syringe barrel and the piston rod of the syringe, respectively.

6. A novel pressure injection device according to claim 5, characterized in that, The protruding limiting structure and the shell limiting structure are two concave shapes distributed on both sides, and the groove portions of the two concave shapes are arranged opposite each other.

7. The novel pressure injection device according to claim 1, characterized in that, The syringe control module is equipped with a base and a linear guide structure. The fixed seat and the movable seat are slidably mounted on the linear guide structure. The detection module includes a force sensor. The fixed seat is connected to the base through the force sensor. The detection axis of the force sensor is parallel to the axis of the piston rod. When the movable seat drives the piston rod of the syringe to move, the force sensor can detect the push-pull force transmitted by the piston rod of the syringe to the syringe barrel, thereby detecting the push-pull force of the piston rod of the syringe.

8. A novel pressure injection device according to claim 7, characterized in that, The linear guide structure consists of two parallel guide rails mounted on the base, with the fixed seat and the movable seat respectively mounted on the guide rails via sliders.

9. A novel pressure injection device according to claim 1, characterized in that, The syringe's first output port is connected to a pressure valve assembly control module, which includes at least two second output ports. The pressure valve assembly control module switches the connection between the syringe's first output port and different second output ports, thereby enabling liquid to be output or drawn in from different second output ports.

10. A novel pressure injection device according to claim 9, characterized in that, The pressurizing valve assembly control module includes a pressurizing valve assembly and a pressurizing valve control host. The pressurizing valve assembly has a main passage and four second output ports. The pressurizing valve assembly is equipped with two valves, which respectively control the connection and closure of the four second output ports and the main passage. The main passage is connected to the first output port of the syringe. The valve is a rotary valve structure. Each rotary valve structure controls the connection and closure of the main passage and four second output ports. The pressurized valve control host is equipped with a corresponding number of valve drive seats. Each valve drive seat drives the corresponding rotary valve structure to rotate, thereby switching the different passages of the pressurized valve assembly. The rotary valve structure is a three-way valve structure. One of the four second output ports is connected to a drug supply device for supplying drug to the pressurized injection device.

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