Preparation device and preparation method of analgesia pump liquid medicine

Abstract

The invention discloses a preparation device and a preparation method of analgesia pump liquid medicine, and relates to the field of medicine dispens.The preparation device comprises a box body and a controller, the box body is provided with a clamping groove and a clamping position, and the bottom of the clamping groove and the bottom of the clamping position are each provided with a weight sensor; a mechanical arm is arranged on the box body, and the arrangement positions of the clamping grooves and the clamping positions are within the working range of the mechanical arm; the free end of the mechanical arm is provided with a fixing structure used for fixing the extraction needle. A draw-off pump is fixed in the box body, and an analgesia pump medicine bag is arranged in the box body; when the preparation device is used, a disposable extraction needle, a liquid medicine tube and an analgesia pump medicine bag exist, the extraction needle is fixed to the free end of the mechanical arm through a fixing structure, the extraction needle is communicated with the extraction pump through the liquid medicine tube, and the extraction pump is communicated with the analgesia pump medicine bag through the liquid medicine tube; the weight sensor is connected with the input end of the controller, and the draw-off pump and the mechanical arm are connected with the output end of the controller. The precision of the dosage of the raw liquid medicine used during drug preparation of the analgesia pump can be improved, so that closed-loop management of the dosage of the raw liquid medicine is realized.

Description

Technical Field

[0001] The invention relates to the field of medicine dispensing, in particular to a dispensing device and a dispensing method for analgesic pump liquid medicine. Background Art

[0002] Analgesic pump is a liquid infusion device that can maintain a stable concentration of drugs in the blood, which can help achieve better analgesic treatment with less drugs. Analgesic pumps usually use neurological drugs, which require multiple raw liquids to be mixed in a certain ratio. Hospitals have strict control over the amount of neurological drugs used in analgesic pumps, so they also have strict control over the amount of raw liquid taken, the amount used during dispensing, and the amount of raw liquid remaining after use; the remaining amount of raw liquid after use plus the amount used during dispensing should be equal to the amount of raw liquid taken, so as to form a closed-loop management of the amount of raw liquid used.

[0003] At present, when preparing drugs for analgesic pumps, the conventional method is manual operation, that is, placing the original liquid medicine on the table, and using a disposable syringe to extract a certain amount of medicine from each medicine bottle in turn, and finally making the disposable syringe mix the extracted liquid medicine in a mixing container in turn. Such operation is particularly dependent on the operator's experience, and the entire operation process is also relatively time-consuming, requiring constant observation and comparison of the scale. During manual preparation, errors often lead to excessive or insufficient dosage of the medicine, thus affecting the drug ratio.

[0004] In order to solve the above problems, there are multiple patent documents in this field (such as patent documents disclosed as CN114469731A, etc.) to solve the above-mentioned original medicine quantitative problem, but there is also the problem that the original medicine will remain in the needle tube of the medicine extraction needle or the pump body. In particular, the technical solution disclosed in the patent document with publication number CN114469731A, each drug has a medicine extraction needle, and there is drug residue in each medicine extraction needle, which has a great impact on the original medicine ratio and original medicine residue used in the analgesic pump drug.

[0005] Therefore, a new solution for preparing the analgesic pump solution is needed. Summary of the invention

[0006] The purpose of the present invention is to provide a preparation device and method for analgesic pump liquid medicine in response to the above-mentioned problems, which can improve the accuracy of the amount of original liquid medicine used in the preparation of analgesic pump medicine to achieve closed-loop management of the amount of original liquid medicine used.

[0007] The technical solution adopted by the present invention is as follows: a preparation device for analgesic pump liquid medicine, including a box and a controller, the box is provided with a slot for placing an original medicine bottle and a slot for placing a physiological saline bottle, and the bottom of the slot and the slot are respectively provided with weight sensors that can obtain the weight of the original medicine bottle and the weight of the physiological saline bottle; a mechanical arm is provided on the box, and the setting positions of the slot and the slot are within the working range of the mechanical arm; the free end of the mechanical arm has a fixing structure for fixing an extraction needle; an extraction pump is fixed in the box, and an analgesic pump medicine bag placement position for placing an analgesic pump medicine bag is provided; when the preparation device is used, there are a disposable extraction needle, a medicine liquid tube and analgesic pump medicine bag, the extraction needle is fixed to the free end of the mechanical arm through a fixing structure, and the medicine liquid tube connects the extraction needle with the extraction pump, and the extraction pump with the analgesic pump medicine bag; the weight sensor is connected to the input end of the controller, and the extraction pump and the mechanical arm are connected to the output end of the controller.

[0008] Furthermore, the fixing structure is a fixing platform fixed on the free end of the robotic arm, and the fixing platform has a through hole for the extraction needle to pass through; the fixing platform has an external thread, and a nut with an internal thread is sleeved on the medicine tube, and the nut is threadedly connected to the fixing platform to press the fixing plate of the extraction needle onto the fixing platform.

[0009] Furthermore, the robotic arm includes a support column, a horizontal arm and a vertical arm. The support column is fixed on the box body, one end of the horizontal arm is rotatably connected to the support arm, the other end of the horizontal arm is connected to one end of the vertical arm through a telescopic mechanism, and the other end of the vertical arm serves as the free end of the robotic arm.

[0010] Furthermore, a rotating motor is arranged between the support column and the cross arm, the rotating motor is fixed on the support column, and the output end of the rotating motor acts on the cross arm; the rotating motor is connected to the controller.

[0011] Furthermore, the telescopic mechanism is any one of a linear motor and a telescopic cylinder, and the telescopic mechanism is connected to a controller.

[0012] Furthermore, the card slot and the card position are both groove structures, and a support plate is slidably connected in the card slot and the card position. The sliding direction of the support plate is vertical, and the weight sensor is located between the support plate and the bottom of the card slot and the card position.

[0013] Furthermore, a display screen and a camera are fixed on the box, and both the display screen and the camera are connected to the controller.

[0014] Furthermore, a barcode printer is provided, and the barcode printer is connected to the controller.

[0015] Furthermore, the side of the box body also has a door body for opening and closing the interior of the box body.

[0016] A method for preparing analgesic pump liquid medicine, using the above-mentioned analgesic pump liquid medicine preparation device, comprises the following steps: S1: placing the original medicine bottle in the card slot, and placing the physiological saline bottle in the card position; the weight sensors in the card slot detect the weight of the original medicine bottles at the corresponding positions, and the weight sensors in the card position detect the weight of the physiological saline bottle, and the weight sensors transmit the detected weight data to the controller, and the controller calculates the remaining weight of each original medicine bottle according to the ratio; and the controller calculates the remaining weight of the physiological saline bottle according to the ratio and the capacity of the extraction needle, the extraction pump, and the liquid medicine tube; S2: The controller controls the robot arm to move with the extraction needle to the slots where the original medicine bottles are placed, selects one of the slots, and inserts the extraction needle into the original medicine bottle in the slot; S3: The controller controls the extraction pump to start, and the extraction pump works; S4: The extraction pump extracts the liquid medicine in the original medicine bottle and transfers the liquid medicine to the medicine bag of the analgesic pump; S5: As the medicine in the original medicine bottle is extracted, the weight data detected by the weight sensor in the card slot decreases until the weight data detected by the weight sensor reaches the remaining weight of the original medicine bottle, and the controller controls the mechanical arm to pull out the original medicine bottle; S6: The controller controls the robot arm to move the extraction needle to other slots where the original medicine bottle is placed, and inserts the extraction needle into the original medicine bottle, repeating steps S3-S5 to complete the extraction of all types of original medicine solutions; S7: The controller controls the robot arm to move with the extraction needle to the position where the physiological saline bottle is placed, and inserts the extraction needle into the physiological saline bottle. The extraction pump extracts the physiological saline in the physiological saline bottle into the analgesic pump bag until the weight data detected by the weight sensor reaches the remaining weight of the physiological saline bottle. The controller controls the extraction pump to stop working; S8: Remove the analgesic pump medicine bag, mix the original medicine solution and normal saline in the analgesic pump medicine bag to complete the preparation of the analgesic pump medicine solution.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention directly obtains the weight of the original medicine bottle and / or the physiological saline bottle through a weight sensor, determines the amount extracted by the extraction pump through the difference, and pushes the original medicine solution extracted later and the original medicine solution in the process of extracting the physiological saline solution (the original medicine solution in the medicine liquid tube and the extraction needle) into the medicine bag of the analgesic pump to ensure that there is no residual medicine solution in the medicine liquid tube and the extraction needle, thereby improving the ratio accuracy; 2. The present invention can record the amount of raw medicine taken, used and remaining, and realize closed-loop management of raw medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the appearance structure of the present invention; Figure 2 It is a schematic diagram of the structure in which the extraction needle disclosed in the present invention is fixed on the mechanical arm; Figure 3 It is a schematic diagram of the position distribution of the analgesic pump medicine bag and the extraction pump disclosed in the present invention; Figure 4 It is a schematic diagram of the structure of the connection between the cross arm and the support column disclosed in the present invention; Figure 5 It is a structural schematic diagram of the cross arm disclosed in the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the card slot disclosed in the present invention; Markings in the figure: 1-box; 11-door; 2-card slot; 21-weight sensor; 22-support plate; 3-card position; 4-mechanical arm; 41-support column; 42-cross arm; 43-telescopic mechanism; 44-vertical arm; 45-rotating motor; 46-driving gear; 47-driven gear; 5-extraction needle; 51-fixed plate; 52-nut; 53-drug liquid tube; 6-extraction pump; 7-analgesic pump medicine bag; 8-display screen; 9-camera. DETAILED DESCRIPTION

[0019] In the description of this specification, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of this specification is usually placed when used. It is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this specification.

[0020] In addition, if the terms "horizontal" or "vertical" appear in the description of this specification, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this specification, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between the internal parts of two elements.

[0022] Example 1 like Figure 1-Figure 6 As shown, a preparation device for analgesic pump liquid medicine includes a box body 1 and a controller. The box body 1 is composed of a bottom plate, a plurality of side plates and a top plate. A card slot 2 for placing an original medicine bottle and a card position 3 for placing a physiological saline bottle are arranged on the top plate of the box body 1. The bottoms of the card slot 2 and the card position 3 are respectively provided with weight sensors 21 capable of obtaining the weight of the original medicine bottle and the weight of the physiological saline bottle. The original medicine bottle contains original medicine solution, and the physiological saline bottle contains physiological saline. The weight sensor 21 can obtain the total weight of the corresponding original medicine bottle and the physiological saline bottle (the weight of the bottle body and the weight of the original medicine solution or physiological saline in the bottle); A mechanical arm 4 is arranged on the top plate of the box body 1, and the arrangement positions of the card slot 2 and the card position 3 are within the working range of the mechanical arm 4; the fixed end of the mechanical arm 4 is fixed on the box body 1, and the free end of the mechanical arm 4 has a fixing structure for fixing the extraction needle 5, that is, the mechanical arm 4 can move with the extraction needle 5 and insert the extraction needle 5 into the original medicine bottle or the physiological salt bottle; an extraction pump 6 is fixed in the box body 1, and an analgesic pump medicine bag 7 placement position for placing the analgesic pump medicine bag 7 is provided; when the preparation device is used, there are a disposable extraction needle 5, a liquid medicine tube 53 and an analgesic pump medicine bag 7, the extraction needle 5 is fixed to the free end of the mechanical arm 4 through a fixed structure, and the medicine liquid tube 53 connects the extraction needle 5 with the extraction pump 6, and the extraction pump 6 with the analgesic pump medicine bag 7, that is, the extraction pump 6 works, and can deliver the original medicine in the original medicine bottle and the physiological saline in the physiological saline bottle into the analgesic pump medicine bag 7 through the extraction needle 5 and the medicine liquid tube 53; the weight sensor 21 is connected to the input end of the controller, and the extraction pump 6 and the mechanical arm 4 are connected to the output end of the controller. The weight sensor 21 not only obtains weight data, but also serves as a signal marking component; specifically, the card slot 2 Whether there is an original medicine bottle in the slot and whether there is a physiological saline bottle in the card position 3 can be identified by the weight sensor 21 (taking the card slot 2 as an example, if there is an original medicine bottle in the card slot 2, the weight sensor 21 can detect the weight data; otherwise, the weight sensor 21 cannot detect the weight data). The controller can determine whether there are original medicine bottles and physiological saline bottles in the card slot 2 and the card position 3 respectively according to the weight sensor 21, thereby controlling the robot arm 4 to move to the card slot 2 and the card position 3 with the original medicine bottle and the physiological saline bottle, thereby ensuring the accuracy of the movement of the robot arm 4 with the extraction needle 5.

[0023] In this embodiment, only one set of disposable extraction needles 5 and medicine tubes 53 are used each time the analgesic pump medicine is prepared. The original medicine extracted later and the original medicine extracted earlier (the original medicine in the medicine tube 53 and the extraction needle 5) during the extraction of physiological saline will be pushed into the analgesic pump medicine bag 7 to ensure that there is no residual medicine in the medicine tube 53 and the extraction needle 5, thereby improving the mixing accuracy.

[0024] In this embodiment, the weight sensor 21 may be a pressure sensor, such as a pressure weighing sensor of model JHHM-H1.

[0025] In this embodiment, the controller may be a microprocessor, a single-chip microcomputer, a PLC or other self-compilable controller.

[0026] In this embodiment, it should be noted that Figure 3 As shown, with respect to the relative spatial position between the analgesic pump medicine bag 7 and the extraction pump 6, it is preferred that the spatial position of the analgesic pump medicine bag 7 is higher than the extraction pump 6, and the spatial position of the medicine liquid tube 53 is lower than the position of the analgesic pump medicine bag 7. This can be achieved by installing the analgesic pump medicine bag 7 in an inverted state (with the liquid inlet of the analgesic pump medicine bag 7 facing downward) to prevent the saline solution in the extraction pump 6 or the medicine liquid tube 53 from entering the analgesic pump medicine bag 7 under the action of its own gravity, thereby preventing excessive addition of saline solution.

[0027] Furthermore, in the present embodiment, the medicine liquid tube 53 is connected to the analgesic pump medicine bag 7 through the extraction needle 5, that is, the medicine liquid tube 53 connected to the analgesic pump medicine bag 7 also has an extraction needle 5, and the extraction needle 5 is inserted upward into the analgesic pump medicine bag 7 to prevent the medicine liquid in the analgesic pump medicine bag 7 from flowing back.

[0028] Furthermore, regarding the inversion of the analgesic pump medicine bag 7, it can be hung on the placement position by means of a hook.

[0029] In this embodiment, for the original medicine and saline solution, the weight can be obtained by subtracting the remaining weight from the initial total weight, and the amount extracted by the extraction pump 6 is determined by the difference. Compared with other usage amounts of original medicine and saline solution directly obtained by flow rate, extraction volume, etc., it is less affected by interference factors and the extraction amount can be determined more accurately.

[0030] Example 2 On the basis of Example 1, an implementable method regarding the “fixed structure” and the “mechanical arm 4” is further proposed.

[0031] A feasible implementation method, regarding the "fixed structure", such as Figure 2 As shown, its structure is a fixing platform fixed on the free end of the robot arm 4, the fixing platform is cylindrical, and has a through hole on the fixing platform, through which the extraction needle 5 can pass; a fixing disk 51 is provided at the needle tail of the extraction needle 5, the fixing platform has an external thread, and a nut 52 with an internal thread is sleeved on the drug liquid tube 53, and the nut 52 is threadedly connected to the fixing platform to press the fixing disk 51 of the extraction needle 5 onto the fixing platform, thereby fixing the extraction needle 5.

[0032] For the robot arm 4, this embodiment provides the following two implementation modes.

[0033] In the first embodiment, the robot arm 4 is a six-degree-of-freedom robot arm 4, which is a structure known to those skilled in the art. Its structure is similar to that of a six-axis robot of model BRTIRUS1510A, but its size is proportionally reduced to be applicable to the present configuration device.

[0034] The second implementation method, such as Figure 1 As shown, the robot arm 4 includes a support column 41, a horizontal arm 42 and a vertical arm 44. The support column 41 is fixed to the top plate of the box body 1. One end of the horizontal arm 42 is rotatably connected to the support arm. By rotating the horizontal arm 42, the robot arm 4 can move with the extraction needle 5 in the horizontal plane to adjust the position of the extraction needle 5; the other end of the horizontal arm 42 is connected to one end of the vertical arm 44 through a telescopic mechanism 43. The other end of the vertical arm 44 serves as the free end of the robot arm 4. The vertical arm 44 is driven to move by the telescopic mechanism 43 to realize the movement of the robot arm 4 with the extraction needle 5 in the vertical direction, thereby realizing the action of inserting or withdrawing the extraction needle 5 from the original medicine bottle or the physiological saline bottle.

[0035] Further, for the second implementation mode, specifically, Figure 4-Figure 5 As shown, a rotary motor 45 is provided between the support column 41 and the cross arm 42, and the rotary motor 45 is fixed on the support column 41. The output end of the rotary motor 45 has a driving gear 46, and the cross arm 42 has a driven gear 47. The axis of the driven gear 47 is colinear with the rotation center of the cross arm 42, and the driving gear 46 is meshed and connected with the driven gear 47. The rotary motor 45 is connected to the controller, and the controller drives the rotary motor 45 to work, thereby realizing the controller controlling the movement of the cross arm 42.

[0036] Further, for the second embodiment, the telescopic mechanism 43 is any one of a linear motor and a telescopic cylinder, preferably a linear motor, and the telescopic mechanism 43 is connected to a controller.

[0037] Example 3 Based on any one of the implementations in Examples 1-2, a feasible specific implementation is further proposed.

[0038] A feasible implementation method is as follows: Figure 6 As shown, the card slot 2 and the card position 3 are both groove-type structures, and a support plate 22 is slidably connected in the card slot 2 and the card position 3. The sliding direction of the support plate 22 is vertical, and the weight sensor 21 is located between the support plate 22 and the bottom of the card slot 2 and the card position 3. The weight of the original medicine bottle and the physiological saline bottle is transferred to the support plate 22, and the support plate 22 acts on the weight sensor 21 to improve the stability of force transmission, thereby improving the accuracy of the gravity sensor in acquiring weight data.

[0039] A feasible implementation method is as follows: Figure 1As shown, a display screen 8 connected to the controller is also fixed on the box body 1. The display screen 8 can be a touch screen 8. The dispensing staff can operate the controller and confirm the drug information through the touch screen 8.

[0040] Furthermore, a camera 9 connected to the controller is fixed on the box body 1. The camera 9 obtains a photo of the original medicine bottle placed on the top plate and presents it on the display screen 8 through the controller, so that the dispensing staff can confirm the type of the original medicine bottle.

[0041] A feasible implementation method also has a barcode printer connected to the controller. The barcode printer is preferably arranged in the box 1. After the analgesic pump solution is prepared, the controller controls the printer to print a barcode, and the barcode contains the information of the analgesic pump solution prepared this time.

[0042] In a feasible implementation manner, the side of the box body 1 also has a door body 11 for opening and closing the interior of the box body 1. The door body 11 is a conventional structure for the box body 1, which is convenient for taking out and installing the analgesic pump medicine bag 7.

[0043] In a feasible implementation, the controller can be connected to the hospital's HIS system. After the doctor issues the medical order in the HIS system, the display screen displays the medical order. The dispensing staff can obtain the corresponding original medicine bottle according to the medical order, place the original medicine bottle in the card slot 2, and the camera 9 takes a photo and transmits it to the controller. The controller can verify the original medicine bottle information by itself. After the original medicine in the original medicine bottle is extracted, the camera 9 can take a photo again to achieve closed-loop management and traceability of image data.

[0044] Example 4 like Figure 1-Figure 6 As shown, a method for preparing analgesic pump liquid, using the preparation device described in any one of the embodiments 1-3, comprises the following steps: S1: Place the original medicine bottle in the card slot 2, and place the physiological saline bottle in the card position 3; the weight sensor 21 in the card slot 2 detects the weight of the original medicine bottle at the corresponding position, and the weight sensor 21 in the card position 3 detects the weight of the physiological saline bottle, and the weight sensor 21 transmits the detected weight data to the controller, and the controller calculates the remaining weight of each original medicine bottle according to the ratio; and the controller calculates the remaining weight of the physiological saline bottle according to the ratio and the capacity of the extraction needle 5, the extraction pump 6, and the liquid medicine tube 53; at the same time, the camera 9 takes a picture of the original medicine bottle, and the taken picture is transmitted to the controller, and the controller presents the picture on the display screen 8, and the dispensing staff confirms it.

[0045] S2: The controller controls the robot arm 4 to move with the extraction needle 5 to the slots 2 where the original medicine bottles are placed, selects one of the slots 2, and inserts the extraction needle 5 into the original medicine bottle in the slot 2; installs the drug liquid tube 53 and the extraction needle 5.

[0046] S3: The controller controls the extraction pump 6 to start, and the extraction pump 6 works.

[0047] S4: The extraction pump 6 extracts the liquid medicine in the original medicine bottle and transfers the liquid medicine to the analgesic pump medicine bag 7.

[0048] S5: As the medicine in the original medicine bottle is extracted, the weight data detected by the weight sensor 21 in the card slot 2 decreases until the weight data detected by the weight sensor 21 reaches the remaining weight of the original medicine bottle. The controller controls the robotic arm 4 to pull out the original medicine bottle and stop the extraction pump 6.

[0049] S6: The controller controls the robot arm 4 to move the extraction needle 5 to other slots 2 where the original medicine bottle is placed, and inserts the extraction needle 5 into the original medicine bottle, and repeats steps S3-S5 to complete the extraction of all types of original medicine solutions.

[0050] S7: The controller controls the robotic arm 4 to move with the extraction needle 5 to the position 3 where the physiological saline bottle is placed, and inserts the extraction needle 5 into the physiological saline bottle. The extraction pump 6 extracts the physiological saline in the physiological saline bottle into the analgesic pump medicine bag 7 until the weight data detected by the weight sensor 21 reaches the remaining weight of the physiological saline bottle. The controller controls the extraction pump 6 to stop working.

[0051] When performing steps S6 and S7, it should be noted that there is a process of pushing the original drug solution, that is, the original drug solution and normal saline extracted later will push the original drug solution extracted previously and remaining in the extraction needle 5, the drug solution tube 53 and the extraction pump 6 into the analgesic pump medicine bag 7, so that no original drug solution will remain in the extraction needle 5, the drug solution tube 53 and the extraction pump 6, thereby ensuring the accuracy of the original drug solution ratio.

[0052] S8: Take out the analgesic pump medicine bag 7, mix the original medicine solution and the normal saline solution in the analgesic pump medicine bag 7, and complete the preparation of the analgesic pump medicine solution; the barcode printer prints the barcode.

[0053] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A preparation device for analgesic pump liquid, characterized in that: The invention comprises a box (1) and a controller. The box (1) is provided with a slot (2) for placing an original medicine bottle and a position (3) for placing a physiological salt bottle. The bottoms of the slot (2) and the position (3) are respectively provided with weight sensors (21) capable of obtaining the weight of the original medicine bottle and the weight of the physiological salt bottle. The box (1) is provided with a mechanical arm (4). The position of the slot (2) and the position (3) is within the working range of the mechanical arm (4). The free end of the mechanical arm (4) has a fixing structure for fixing an extraction needle (5). An extraction pump (6) is fixed in the box (1). , and an analgesic pump medicine bag (7) placement position for placing the analgesic pump medicine bag (7); when the preparation device is used, there are a disposable extraction needle (5), a medicine liquid tube (53) and an analgesic pump medicine bag (7), the extraction needle (5) is fixed to the free end of the mechanical arm (4) through a fixing structure, and the medicine liquid tube (53) connects the extraction needle (5) with the extraction pump (6), and the extraction pump (6) with the analgesic pump medicine bag (7); the weight sensor (21) is connected to the input end of the controller, and the extraction pump (6) and the mechanical arm (4) are connected to the output end of the controller.

2. The preparation device according to claim 1, characterized in that: The fixing structure is a fixing platform fixed to the free end of the mechanical arm (4), the fixing platform having a through hole for the extraction needle (5) to pass through; the fixing platform having an external thread, a nut (52) having an internal thread is sleeved on the liquid medicine tube (53), and the nut (52) is threadedly connected to the fixing platform to press the fixing plate (51) of the extraction needle (5) onto the fixing platform.

3. The preparation device according to claim 1, characterized in that: The mechanical arm (4) comprises a support column (41), a horizontal arm (42) and a vertical arm (44); the support column (41) is fixed on the box body (1); one end of the horizontal arm (42) is rotatably connected to the support arm; the other end of the horizontal arm (42) is connected to one end of the vertical arm (44) via a telescopic mechanism (43); and the other end of the vertical arm (44) serves as a free end of the mechanical arm (4).

4. The preparation device according to claim 3, characterized in that: A rotating motor (45) is provided between the supporting column (41) and the cross arm (42); the rotating motor (45) is fixed on the supporting column (41); an output end of the rotating motor (45) acts on the cross arm (42); and the rotating motor (45) is connected to a controller.

5. The preparation device according to claim 3, characterized in that: The telescopic mechanism (43) is any one of a linear motor and a telescopic cylinder, and the telescopic mechanism (43) is connected to a controller.

6. The preparation device according to claim 1, characterized in that: The card slot (2) and the card position (3) are both slot-shaped structures, and a support plate (22) is slidably connected inside the card slot (2) and the card position (3), the sliding direction of the support plate (22) is vertical, and the weight sensor (21) is located between the support plate (22) and the bottom of the card slot (2) and the card position (3).

7. The preparation device according to claim 1, characterized in that: A display screen (8) and a camera (9) are also fixed on the box body (1), and the display screen (8) and the camera (9) are both connected to the controller.

8. The preparation device according to claim 7, characterized in that: A barcode printer is also provided, and the barcode printer is connected to the controller.

9. The preparation device according to claim 1, characterized in that: The side of the box body (1) also has a door body (11) for opening and closing the interior of the box body (1).

10. A method for preparing a liquid analgesic pump, using a liquid analgesic pump preparation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: placing an original medicine bottle in the card slot (2), and placing a physiological saline bottle in the card position (3); the weight sensor (21) in the card slot (2) detects the weight of the original medicine bottle at the corresponding position, and the weight sensor (21) in the card position (3) detects the weight of the physiological saline bottle, and the weight sensor (21) transmits the detected weight data to the controller, and the controller calculates the remaining weight of each original medicine bottle according to the ratio; and the controller calculates the remaining weight of the physiological saline bottle according to the ratio and the capacity of the extraction needle (5), the extraction pump (6), and the liquid medicine tube (53); S2: The controller controls the robot arm (4) to move the extraction needle (5) to the slots (2) where the original medicine bottles are placed, selects one of the slots (2), and inserts the extraction needle (5) into the original medicine bottle in the slot (2); S3: the controller controls the extraction pump (6) to start, and the extraction pump (6) works; S4: the extraction pump (6) extracts the liquid medicine in the original medicine bottle and transfers the liquid medicine to the analgesic pump medicine bag (7); S5: As the medicine in the original medicine bottle is extracted, the weight data detected by the weight sensor (21) in the card slot (2) decreases until the weight data detected by the weight sensor (21) reaches the remaining weight of the original medicine bottle, and the controller controls the mechanical arm (4) to pull out the original medicine bottle; S6: The controller controls the robot arm (4) to move the extraction needle (5) to another slot (2) where the original medicine bottle is placed, and inserts the extraction needle (5) into the original medicine bottle, and repeats steps S3-S5 to complete the extraction of all types of original medicine solutions; S7: The controller controls the robot arm (4) to move the extraction needle (5) to the position (3) where the physiological saline bottle is placed, and inserts the extraction needle (5) into the physiological saline bottle. The extraction pump (6) extracts the physiological saline in the physiological saline bottle into the analgesic pump bag (7) until the weight data detected by the weight sensor (21) reaches the remaining weight of the physiological saline bottle. The controller controls the extraction pump (6) to stop working. S8: Remove the analgesic pump medicine bag (7), mix the original medicine solution and the normal saline solution in the analgesic pump medicine bag (7), and complete the preparation of the analgesic pump medicine solution.

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