Anesthetic needle puncture auxiliary tool based on air pressure detection and use method of anesthetic needle puncture auxiliary tool

Abstract

The invention discloses an anesthetic needle puncture auxiliary tool based on air pressure detection and a using method thereof.The anesthetic needle puncture auxiliary tool comprises a shell, an air pressure detection assembly and an air pressure fluctuation assembly, the air pressure fluctuation assembly and the air pressure detection assembly are connected through a puncture gas pipeline, and the air pressure fluctuation assembly can inflate and / or inhale the puncture gas pipeline; the air pressure detection assembly detects air pressure changes in the puncture gas pipeline. The puncture needle is inflated and / or sucked through the air injection pressure fluctuation assembly, when the puncture needle penetrates into the target object, the air pressure change in the air path is detected through the air pressure detection assembly, whether the puncture needle reaches the target position of the target object or not is judged, and an operator is reminded to pay attention.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an anesthesia needle puncture auxiliary tool based on air pressure detection and a use method thereof. Background Art

[0002] When performing surgery or intubation on patients clinically, they often need to be anesthetized. The current anesthesia method is to use an anesthetic needle for anesthesia. For example, lumbar anesthesia is performed manually by a doctor. During the anesthesia process, the doctor holds the anesthetic needle horizontally, then aims the needle tip of the anesthetic needle at the patient's lumbar vertebrae, and manually inserts the anesthetic needle into the patient's spine. During this process, the doctor needs to advance the anesthetic needle at a uniform and stable speed to prevent the doctor's arm from shaking. And during the process of the anesthetic needle inserting into the middle of the patient, if the doctor feels that the anesthetic needle has a "missing" feeling, that is, the resistance to insertion suddenly decreases, the insertion needs to be stopped immediately. At this time, the needle tip of the anesthetic needle has reached the anesthesia position. However, the insertion depth is difficult to control during the insertion process, and the doctor needs to judge based on experience. When the doctor's attention is not focused or the anesthetic needle is stuck, it is easy to insert the needle tip of the anesthetic needle too deeply, causing damage to the nerve tissue in the patient's spine.

[0003] Chinese patent application No. 2023200486870 discloses an epidural negative pressure fluorescence induction puncture device, which includes a hollow cylinder, which is connected to the side outlet of the three-way pipe by docking, and a fluorescent chamber with a sealed structure is isolated in the cylinder. The top wall of the fluorescent chamber is formed by a thin film with an elastic structure, and a flap with a thin sheet structure is rotatably arranged in the fluorescent chamber; the closed flap separates the fluorescent chamber into an upper and lower chambers that are independent of each other, the upper chamber is used to hold a mixed solution of fluorescent dyes and oxalic acid ester derivatives, and the lower chamber is used to hold hydrogen peroxide; the open flap connects the upper and lower chambers. When the epidural puncture needle punctures the epidural, the flap opens, and the substances in the upper and lower chambers undergo a fluorescent reaction to produce fluorescence. The fluorescence can be objectively and accurately judged that the puncture position has reached the epidural space. The above structure is relatively complicated. The negative pressure state of the epidural space is introduced into the cylinder through the negative pressure channel and directly acts on the film, which is very inconvenient to use. It is difficult to accurately control the closed and open states of the valve, and fluorescent reactions may occur by mistake, causing misjudgment by medical staff. Moreover, the utility model is a disposable consumable product, which is time-consuming and labor-intensive to produce, and is not conducive to popularization.

[0004] Chinese patent application No. 202123453781.4 discloses a negative pressure puncture needle for epidural anesthesia, one end of the needle tube is a needle tip, and a needle seat is fixed to the other end of the needle tube, the needle seat is threadedly connected to a sleeve, and the sleeve is threadedly connected to a heparin cap, and the heparin cap, sleeve, needle seat and needle tube are connected in sequence; through hole one and through hole two are opened on one side of the sleeve, an air bag is fixed on the outside of the sleeve, the air bag wraps through hole one and through hole two, and an air horn is installed in the sleeve, the air inlet of the air horn is connected to through hole one, and through hole two is provided with a one-way valve to guide the airflow from the sleeve to the air bag, the syringe feeds air to the air bag to inflate the air, the puncture needle enters the epidural space, the airflow discharges from the air horn, and a sound reminder is generated to inform the doctor that the puncture needle has entered the epidural space. The airbag is fixed by hot-melt on the outside of the sleeve of the patent, and a cutout is opened on the side of the sleeve, with the air horn facing the cutout. The opening of the cutout is larger than the maximum cross-section of the air horn so that the air horn can enter the sleeve from the cutout. Because the sleeve is small in size, the large-diameter cutout design facilitates the installation of the air horn in the sleeve. A copper sheet is sealed and fixed at the cutout. The copper sheet is hot-melted and fixed at the cutout position, and the cutout is sealed and installed, and the air horn is fixed by hot-melt inside the sleeve. Since the sleeve itself is small in size, installing the above structure on the sleeve makes it difficult to install, or the installation is not firm, the airbag is inconvenient to inflate and its inflation volume cannot be controlled. The deflation of the airbag reminds the doctor to make a judgment through sound, which may cause misjudgment of medical staff due to mishearing. In addition, the structure is complicated, the cost of a single use is high, and it is not conducive to popularization.

[0005] The existing technology still makes subjective judgments on the puncture position based on the experience of medical staff, and its accuracy cannot be guaranteed; at the same time, the improved solution has technical defects of complex structure and difficult manufacturing. Therefore, it is urgent to provide a puncture auxiliary tool that can objectively and accurately judge whether the puncture needle has entered the epidural space, so as to solve the technical defects of the existing technology that mainly relies on the experience of medical staff to subjectively judge the puncture position and has complex structure and difficult manufacturing. Summary of the invention

[0006] The purpose of the present invention is to provide a method to solve the existing technical defects and unattainable technical requirements.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An anesthesia needle puncture auxiliary tool based on air pressure detection includes a shell, an air pressure detection component and an air pressure fluctuation component. The air pressure fluctuation component and the air pressure detection component are connected through a puncture gas pipeline. The air pressure fluctuation component inflates and / or inhales the puncture gas pipeline, and the air pressure detection component detects the air pressure changes in the puncture gas pipeline.

[0009] Preferably, the air pressure fluctuation component is arranged on the housing, the puncture gas pipeline includes a connecting air tube and a puncture needle, the air pressure fluctuation component includes a syringe and a linear motion mechanism, the output port of the syringe is connected to the puncture needle air circuit through the connecting air tube, and the linear motion mechanism drives the piston of the syringe to reciprocate, thereby inflating and / or inhaling the puncture needle;

[0010] Alternatively, the air pressure fluctuation component is a peristaltic pump, which is provided with a quick-change pressure plate, which can be manually controlled to open and close. When the quick-change pressure plate is opened, the middle part of the connecting air pipe can be placed in the gap between the quick-change pressure plate and the multiple groups of rollers, and then the quick-change pressure plate is closed. When the peristaltic pump is working, the multiple groups of rollers alternately squeeze the connecting air pipe, output and / or withdraw the squeezed gas in the connecting air pipe, and connect the connecting air pipe to the puncture needle air path.

[0011] Preferably, the air pressure detection component is an air pressure sensor, the housing is provided with a display screen and / or a warning component, and a corresponding alarm or light is emitted through the display screen and / or the warning component to indicate that the puncture needle has entered the target position in the target object, the warning component is a buzzer or an alarm light, and the connecting air tube is connected to the tail of the puncture needle through a first quick connector.

[0012] Preferably, the device further comprises a force sensor for detecting the axial puncture resistance exerted on the puncture needle, one end of the force sensor is connected to the movable handle, and the other end of the force sensor is connected to the tail of the puncture needle.

[0013] Preferably, the force sensor and the housing are connected by a cable or wireless communication, and a waveform of the axial puncture resistance is also displayed on the display screen, wherein the waveform of the axial puncture resistance shows a waveform of resistance variation collected by the force sensor.

[0014] Preferably, the first quick connector is connected to one end of the force sensor via a second quick connector assembly, and the second quick connector assembly is a plug-in structure or a snap-on structure.

[0015] Preferably, the second quick-connect assembly connects one end of the force sensor to the first quick-connect connector via a sterilization isolation sleeve, and the sterilization isolation sleeve is made of a plastic film and sterilized.

[0016] Preferably, the display screen also displays a waveform of air pressure, and the waveform of air pressure displays a waveform of air pressure changes collected by the air pressure sensor.

[0017] Preferably: a trachea interface connected to the air pressure detection component is provided on the outer shell, and the connecting trachea includes a three-way joint, a first trachea and a second trachea, the three joints of the three-way joint are respectively connected to the first trachea, the second trachea and the trachea interface, the second trachea is connected to the air pressure fluctuation component, the first trachea is connected to the puncture needle, the first trachea is a flexible hose, and the length of the first trachea exceeds 600 mm.

[0018] A method for using an anesthesia needle puncture auxiliary tool based on air pressure detection comprises the following steps:

[0019] (1) Connect the sterilized trachea to the puncture needle;

[0020] (2) The air pressure fluctuation component is started to inflate and / or inhale the puncture needle through the connecting air tube. The operator holds the tail of the puncture needle and inserts the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the connecting air tube. When the puncture needle enters the target position of the target object, the needle tip is unblocked, and part of the gas will enter / exit the target position from the front end of the puncture needle. The pressure in the connecting air tube changes accordingly. The air pressure detection component detects the pressure change, determines whether the puncture needle has reached the target position of the target object, and then makes a corresponding prompt;

[0021] Alternatively, (1) connect the sterilized trachea to the puncture needle;

[0022] (2) The air pressure fluctuation component is started to inflate and / or inhale the puncture needle through the trachea. The operator holds the movable handle to insert the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the trachea while the force sensor detects the axial puncture resistance of the puncture needle. When the puncture needle enters the target position of the target object, the needle tip loses the blockage. Based on the change in puncture resistance, the current puncture depth of the puncture needle is fed back. Combined with the information on the air pressure change, it is finally determined whether the puncture has reached the target position, and then a corresponding prompt is given.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The target object is the biological tissue. When puncturing, the needle tip is inserted into the biological tissue, and the needle is inflated and / or inhaled through a syringe or a peristaltic pump. The air pressure change in the air path is detected by the air pressure sensor. When the puncture needle reaches the epidural space in the biological tissue, the needle tip loses its blockage, and part of the gas in the air path enters the epidural space from the front end of the puncture needle. At the same time, the air pressure inside the air path and the puncture needle drops rapidly and is fed back to the air pressure sensor. The control system collects the signal of the air pressure sensor to determine whether the puncture needle has reached the target position of the target object, and then makes a corresponding alarm or light prompt through the display screen and / or the alarm component, and immediately stops the syringe or peristaltic pump to prevent too much gas from entering the epidural space.

[0025] 2. The axial puncture resistance of the puncture needle is detected by the force sensor, and combined with the information of air pressure changes, it is finally determined whether the puncture has reached the target position. Multiple information is superimposed and confirmed to improve accuracy.

[0026] 3. The connecting air pipe can be detachably installed on the outer shell. The connecting air pipe has low cost and can be used as a disposable consumable, eliminating the need for repeated disinfection of the connecting air pipe, making it more convenient to use and reducing the cost of use.

[0027] 4. Use a syringe or peristaltic pump, which can accurately control the air pressure without generating a large amount of gas into the epidural space. It can accurately detect the puncture depth and let the user know the change of air pressure through a waveform diagram to prevent misjudgment and excessive puncture, and avoid the puncture needle from penetrating the patient's epidural mold and damaging the spinal cord or nerves, thereby improving the success rate of puncture and ensuring high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0030] Figure 3 This is a state diagram of the puncture needle piercing the target object according to Embodiment 1 of the present invention;

[0031] Figure 4 This is a diagram showing the state of the puncture needle of Example 1 of the present invention being inserted into a cavity;

[0032] Figure 5 This is a schematic diagram of the overall structure of Example 2 of the present invention without installing the air tube and the syringe;

[0033] Figure 6 This is a schematic diagram of the overall structure of the embodiment 2 of the present invention in which the trachea and the syringe are installed and connected;

[0034] Figure 7 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention;

[0035] Figure 8 This is a schematic diagram of the matching structure between the puncture needle and the second trachea according to Embodiment 2 of the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of a syringe according to Example 2 of the present invention;

[0037] Fig.10 It is a front structural schematic diagram of the syringe driving mechanism of Example 2 of the present invention;

[0038] Fig.11 It is a schematic diagram of the reverse structure of the syringe driving mechanism of Example 2 of the present invention;

[0039] Fig.12 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0040] Fig.13 This is a schematic diagram of the internal structure of Embodiment 3 of the present invention;

[0041] Fig.14 This is a schematic diagram of the structure of the connecting air pipe of Example 3 of the present invention;

[0042] Fig.15 This is a schematic structural diagram of a first trachea and a puncture needle according to Embodiment 3 of the present invention;

[0043] Fig.16 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention;

[0044] Fig.17 This is a structural explosion diagram of Example 4 of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] An anesthesia needle puncture auxiliary tool based on air pressure detection includes a shell, an air pressure detection component and an air pressure fluctuation component. The air pressure fluctuation component and the air pressure detection component are connected through a puncture gas pipeline. The air pressure fluctuation component inflates and / or inhales the puncture gas pipeline, and the air pressure detection component detects the air pressure changes in the puncture gas pipeline.

[0048] The air pressure fluctuation component is arranged on the shell, the puncture gas pipeline includes a connecting trachea and a puncture needle, the air pressure fluctuation component includes a syringe and a linear motion mechanism, the output port of the syringe is connected to the puncture needle air circuit through the connecting trachea, and the linear motion mechanism drives the piston of the syringe to reciprocate, thereby inflating and / or inhaling the puncture needle.

[0049] The air pressure detection component is an air pressure sensor, and a display screen and / or a warning component is provided on the housing. The display screen and / or the warning component make corresponding alarms or lights to prompt that the puncture needle has entered the target position in the target object. The warning component is a buzzer or an alarm light, and the connecting air pipe is connected to the tail of the puncture needle through a first quick connector.

[0050] The force sensor and the housing are connected by a cable or wireless communication. The display screen also displays a waveform of the axial puncture resistance, which displays a resistance change waveform collected by the force sensor.

[0051] The display screen also displays a waveform of air pressure, which displays a waveform of air pressure changes collected by the air pressure sensor.

[0052] The outer shell is provided with an air pipe interface connected to the air pressure detection component, and the connecting air pipe includes a three-way joint, a first air pipe and a second air pipe. The three joints of the three-way joint are respectively connected to the first air pipe, the second air pipe and the air pipe interface, the second air pipe is connected to the air pressure fluctuation component, the first air pipe is connected to the puncture needle, the first air pipe is a flexible hose, and the length of the first air pipe exceeds 600mm.

[0053] like Figures 1 to 4 The linear motion mechanism is a motor screw module 2, on which a syringe 1 is installed. The first air pipe A3 is connected to the syringe 1. An air pressure sensor 4 is installed inside the device, which is connected to the second air pipe A10 and connected to the first air pipe A3 through a three-way pipe 7. Finally, a section of the third air pipe A11 is connected to the three-way pipe 7, and the other end is connected to the air pipe connector 8 on the housing.

[0054] The air pressure detection component is an air pressure sensor.

[0055] When the device is used, the puncture needle 6 is connected to the connecting trachea 9, and the other end of the connecting trachea 9 is connected to the trachea connector 8. At this time, the puncture needle 6 is connected to the syringe 1 and the air pressure sensor 4, and then the motor screw module 2 works to make the piston inside the syringe 1 reciprocate at a high frequency range, or move unidirectionally. When the syringe 1 is working, the air pressure sensor 4 detects the air pressure change inside the trachea 3 channel. When the puncture needle 6 is not working, the needle tip is exposed to the air. When the syringe 1 is inflated or exhausted, the gas will enter and exit from the front end of the puncture needle, so the operation of the syringe 1 will not affect the air pressure inside the channel. The target position in the target object is the epidural space 1001.

[0056] When the puncture needle 6 is puncturing, the needle tip of the puncture needle 6 is inserted into the human tissue. At this time, the operation of the syringe 1 will cause the air pressure inside the channel to change and be fed back through the air pressure sensor 4. When the puncture needle 6 reaches the epidural space 1001 in the human body, the needle tip loses its obstruction, and some gas will enter and exit the epidural space 1001 from the front end of the puncture needle. At the same time, the internal air pressure will tend to be stable again and be fed back to the air pressure sensor 4. The control system collects the signal of the air pressure sensor 4 and uses it to determine whether the puncture needle has reached the epidural space 1001. The housing is provided with a display screen 16 and / or a warning component, and the display screen 16 and / or the warning component make corresponding alarms or lights to prompt that the puncture needle has entered the target position in the target object. The warning component is a buzzer or an alarm light. The display screen 16 also displays a waveform of air pressure, and the waveform of air pressure shows the air pressure value collected by the air pressure sensor.

[0057] Example 2

[0058] like Figures 5 to 11 An anesthesia needle puncture auxiliary tool based on air pressure detection includes a housing 101, a syringe 1, a puncture needle 6, a connecting trachea 9 and an air pressure sensor 4. The syringe 1 is connected to the puncture needle 6 through the connecting trachea 9. The housing 101 is provided with a syringe drive mechanism. The syringe 1 is detachably mounted on the syringe drive mechanism. The syringe 1 is located outside the housing 101. The syringe drive mechanism drives the piston 21 of the syringe 1 to move, thereby controlling the syringe 1 to inflate and / or inhale the puncture needle 6 through the connecting trachea 9. The air pressure sensor 4 is arranged in the housing 101. The connecting trachea 9 is connected to the air pressure sensor 4. The air pressure sensor 4 detects the air pressure change in the connecting trachea 9 and the puncture needle 6. The syringe 1 is a disposable consumable after sterilization.

[0059] Preferably, the syringe drive mechanism adopts a motor screw module 2, which includes a mounting frame 61 and a driving assembly. The mounting frame 61 is fixedly arranged on the outer shell 101, and the outer side surface of the mounting frame 61 is exposed to the outer shell 101. A support 62 is provided on the outer side surface of the mounting frame 61. The body of the syringe 1 is installed on the support 62 through a quick-release structure. The quick-connect structure is one or a combination of a plug-in structure, a snap-on structure, a threaded structure or a locking structure. The driving assembly drives the piston 21 of the syringe 1 to move along the axial direction of the syringe 1. The driving assembly is one or a combination of a screw nut motion assembly, a gear rack motion assembly, and a belt drive assembly.

[0060] Furthermore, in this embodiment, the quick-connect structure is specifically introduced as a snap-on structure: it includes a pressure plate 701 and a quick-connect snap-on 801, and ears 22 are respectively provided on both sides of the body of the syringe 1, and two pillars 621 are provided on the support 62. The two ears 22 are respectively sleeved on the pillars 621, and the pressure plate 701 is connected to the pillars 621 through the quick-connect snap-on 801. The pressure plate 701 can press the body of the syringe 1 against the support 62.

[0061] Furthermore, in this embodiment, the driving assembly is specifically introduced as a screw nut motion assembly: it includes a motor 63, a screw 64, a nut seat 65 and a moving block 66. The motor 63, the screw 64 and the nut seat 65 are located on the inner side of the mounting frame 61, and the moving block 66 is located on the outer side of the mounting frame 61. The nut seat 65 and the mounting frame 61 are slidingly matched along the axial direction of the syringe 1. The sliding cooperation is achieved by the structure of the guide rod, and of course it can also be a guide rail and guide groove structure. The axial direction of the screw 64 is parallel to the axial direction of the syringe 1. The screw 64 is rotatably arranged on the mounting frame 61, and the nut seat 65 is sleeved on the screw 64 and threadedly matched with the screw 64. The nut seat 65 is fixedly connected to the moving block 66. The piston 21 of the syringe 1 is provided with a connecting ring 211, and the connecting ring 211 is sleeved on the moving block 66. The motor 63 directly drives or drives the screw 64 to rotate through the transmission assembly, thereby driving the nut seat 65, the moving block 66 and the piston 21 of the syringe 1 to move together. The transmission assembly is a structure of a transmission belt and a pulley, and can certainly also be a structure of a gear set.

[0062] Furthermore, the mounting frame 61 is also provided with a first travel switch 67 and a second travel switch 68, which can detect the moving position of the nut seat 65, and the nut seat 65 is provided with anti-collision blocks 69 at the front and rear ends of the screw rod 64 in the axial direction.

[0063] Preferably, the housing 101 is provided with a trachea interface 1101 and an installation position 12 on two adjacent outer surfaces, the inner end of the trachea interface 1101 is connected to the air pressure sensor 4 through the third trachea B111, the outer end of the trachea interface 1101 is connected to the connecting trachea 9, the motor screw module 2 is installed at the installation position 12 of the housing 101, the connecting trachea 9 includes a three-way joint 41, a first trachea B42 and a second trachea B43, the three joints of the three-way joint 41 are respectively connected to the first trachea B42, the second trachea B43 and the trachea interface 1101, the first trachea B42 is a flexible hose with a length of more than 600 mm, the end of the first trachea B42 is detachably connected to the puncture needle 6, and the end of the second trachea B43 is connected to the output port of the syringe 1. The first trachea B42 is a sterilized plastic tube or a silicone tube, and the second trachea B43 is a sterilized silicone tube.

[0064] Furthermore, the specific structure of the detachable connection between the end of the first trachea B42 and the puncture needle 6 is as follows: the first trachea B42 is provided with a conical surface 421 at one end close to the puncture needle 6, and the one end of the puncture needle 6 is provided with a conical hole 31 matching the conical surface 421. The end of the first trachea B42 with the conical surface 421 can be inserted into the conical hole 31 of the puncture needle 6, and friction self-locking is achieved through the taper matching, thereby realizing the quick plug-in and pull-out connection between the first trachea B42 and the puncture needle 6.

[0065] Preferably, a display screen 16 and / or an alarm component is provided on the housing 101, and a corresponding alarm or light prompt is made through the display screen 16 and / or the alarm component to indicate that the puncture needle has entered the target position in the target object. The alarm component is a buzzer or an alarm light, and the target position is inside the epidural space 1001. The display screen 16 also displays a waveform of the air pressure, which displays the air pressure value collected by the air pressure sensor.

[0066] Working principle: When using the device, connect the three-way connector 41 to the trachea interface 1101, quickly install the syringe 1 on the motor screw module 2 through the quick buckle 801 and the pressure plate 701, connect one end of the second trachea 43 to the syringe 1, and connect the other end to the three-way connector 41, connect the first trachea B42 to the three-way connector 41, and connect the puncture needle 6 to the other end connector of the first trachea B42. The connection method between the puncture needle 6 and the first trachea B42 is a conical surface fit, which can be quickly plugged in and out during use.

[0067] After the connection between the trachea 9 and the puncture needle 6 is completed, the motor screw module 2 starts to work, which drives the piston 21 of the syringe 1 to move and inflate the puncture needle 6. When the puncture needle 6 is not working, the needle tip is exposed to the air, and the gas delivered by the syringe 1 will be discharged through the puncture needle 6. Therefore, the operation of the syringe 1 will not affect the air pressure inside the channel.

[0068] When the puncture needle 6 is puncturing, the needle tip of the puncture needle 6 is inserted into the target object, and the needle tip of the puncture needle 6 is blocked and sealed (such as Figure 3 As shown), the operation of the motor screw module 2 will cause the air pressure inside the channel to change and be fed back through the air pressure sensor 4, and the current air pressure size is displayed on the display screen 16 through a waveform diagram. When the puncture needle 6 reaches the epidural space 1001 of the target object, the needle tip loses the obstruction (as shown in FIG. Figure 4As shown in the figure, part of the gas in the first trachea B7 will enter the epidural space 1001 from the front end of the puncture needle, and the air pressure inside the first trachea B42 will drop rapidly and be fed back to the air pressure sensor 4. The current air pressure will be displayed on the display screen 16 through a waveform diagram. At the same time, the internal air pressure will tend to be stable again and be fed back to the air pressure sensor 4. The control system collects the signal of the air pressure sensor 4 and uses it to determine whether the puncture needle has reached the epidural space 1001. Then, the display screen 16 and / or the alarm component will make a corresponding alarm or light prompt, and the motor screw module 2 will be stopped immediately to prevent too much gas from entering the epidural space 1001. It should be pointed out that even if there is fluid accumulation in the epidural space 1001, the gas will enter the epidural space 1001 from the front end of the puncture needle 6, and the air pressure inside the first trachea 42 will drop rapidly and be fed back to the air pressure sensor 4.

[0069] Example 3

[0070] This embodiment refers to the working principle of Embodiment 1, with the difference being that the air pressure fluctuation component is a peristaltic pump, and the peristaltic pump is provided with a quick-change pressure plate, which can be manually controlled to open and close. When the quick-change pressure plate is opened, the middle part of the peristaltic trachea can be placed in the gap between the quick-change pressure plate and the multiple groups of rollers, and then the quick-change pressure plate is closed. When the peristaltic pump is working, the multiple groups of rollers alternately squeeze the peristaltic trachea to output and / or withdraw the squeezed gas in the peristaltic trachea, and the peristaltic trachea is connected to the puncture needle air path.

[0071] like Figures 12 to 15 An anesthesia needle puncture auxiliary tool based on air pressure detection includes a puncture needle 6, a connecting trachea and a peristaltic pump 301. The puncture needle 6 and the peristaltic pump 301 are connected through the connecting trachea. The pump head of the peristaltic pump 301 acts on the connecting trachea to inflate and / or inhale the puncture needle 6. The connecting trachea is also connected to an air pressure sensor 4, which detects the air pressure in the connecting trachea.

[0072] It also includes a housing 101, an air pressure sensor 4 is arranged in the housing 101, and the housing 101 is provided with an air pipe interface 1101 and a pump installation position on two adjacent outer sides, the air pipe interface 1101 is connected to the air pressure sensor 4, the connecting air pipe is connected to the air pipe interface 1101, the peristaltic pump 301 is installed at the pump installation position of the housing 101, and the pump head of the peristaltic pump 301 extends out of the housing 101. Specifically, the air pipe interface 1101 is connected to the air pressure sensor 4 through a third air pipe C1111.

[0073] The connecting air pipe includes a three-way joint 41, a first air pipe C4201 and a second air pipe C431. The three joints of the three-way joint 41 are respectively connected to the first air pipe C4201, the second air pipe C431 and the air pipe interface 1101. The end of the first air pipe C4201 is detachably connected to the puncture needle 6. The tube body of the second air pipe C431 is installed in the pump head of the peristaltic pump 301. The port of the second air pipe C431 extends out of the pump head of the peristaltic pump 301. The pump head of the peristaltic pump 301 acts on the second air pipe C431 to output and / or draw back gas. The gas is discharged or drawn in from the front end of the puncture needle 6 through the first air pipe C4201, and the air pressure change in the first air pipe C4201 is fed back through the air pressure sensor 4. The first air tube C4201 is a sterilized plastic tube or a silicone tube, the second air tube C431 is a sterilized silicone tube, the first air tube C4201 is a flexible hose, and the length of the first air tube C4201 is greater than 600 mm.

[0074] A conical surface is provided on one end of the first trachea C4201 away from the three-way connector 41, and a conical hole matching the conical surface is provided at the end of the puncture needle 6. The conical surface can be inserted into the conical hole and achieve friction self-locking through the taper fit, thereby realizing a quick plug-in connection between the first trachea C4201 and the puncture needle 6.

[0075] The pump head of the peristaltic pump 301 is provided with a quick-change pressure plate that can be opened and closed. The quick-change pressure plate can be manually controlled to open and close. The middle part of the second air pipe C431 is placed in the gap between the quick-change pressure plate and the multiple groups of rollers. When the peristaltic pump 301 is working, the multiple groups of rollers alternately squeeze the second air pipe C431 to output and / or withdraw the squeezed gas in the second air pipe C431.

[0076] When the puncture needle 6 is exposed to the air, the gas output and / or drawn back by the peristaltic pump 301 is discharged or drawn in through the puncture needle 6, and the air pressure in the first trachea C4201 will not increase.

[0077] The puncture needle 6 is inserted into the target object, and the needle tip of the puncture needle 6 is blocked. The operation of the peristaltic pump 301 will increase the air pressure in the first trachea C4201 and provide feedback through the air pressure sensor 4. When the puncture needle 6 penetrates into the target position in the target object, the needle tip of the puncture needle 6 is unblocked, and the gas in the first trachea C4201 enters the target position in the target object. The air pressure in the channel will drop rapidly and be fed back to the air pressure sensor 4, so as to determine whether the puncture needle 6 has reached the target position in the target object.

[0078] It also includes a control system, which is installed on the housing 101 and can collect signals from the air pressure sensor 4 .

[0079] The housing 101 is provided with a display screen 16 and / or a warning component, which can generate corresponding alarms or lights to indicate that the puncture needle 6 has entered the target position in the target object. The warning component can be a buzzer or an alarm light. The target position is the epidural space 1001 .

[0080] The display screen 16 also displays a waveform of air pressure, which displays the air pressure value collected by the air pressure sensor 4 .

[0081] The working principle of this embodiment is as follows:

[0082] When using the device, connect the three-way connector 41 to the trachea interface 1101. Open the quick-change pressure plate on the peristaltic pump 301, install the middle part of the second trachea C431 in the gap between the quick-change pressure plate of the peristaltic pump 301 and the multiple groups of rollers, then close the quick-change pressure plate, and then connect the second trachea C431 to the three-way connector 41, connect one end connector of the first trachea C4201 to the three-way connector 41, and connect the other end connector of the first trachea C4201 to the puncture needle 6. The connection mode between the puncture needle 6 and the first trachea C4201 is a conical surface matching connection, which can achieve quick plugging and unplugging when in use.

[0083] After the first trachea C4201 and the puncture needle 6 are connected, the peristaltic pump 301 starts to work, and evenly and continuously delivers gas to the first trachea C4201. When the needle tip of the puncture needle 6 is exposed to the air, the gas delivered by the peristaltic pump 301 will be discharged through the puncture needle 6. Therefore, the operation of the peristaltic pump 301 will not increase the air pressure inside the channel.

[0084] When the puncture needle 6 is inserted into the target object, the needle tip of the puncture needle 6 is blocked and sealed (such as Figure 3 As shown in FIG. 1 ), the peristaltic pump 301 squeezes the second trachea to increase the air pressure inside the first trachea C4201 and the puncture needle 6 and provide feedback through the air pressure sensor 4. The current air pressure is displayed on the display screen 16 through a waveform. When the puncture needle 6 reaches the epidural space 1001 in the target object, the needle tip loses its obstruction (as shown in FIG. 1 ). Figure 4As shown in the figure, part of the gas in the first trachea C4201 will enter the epidural space 1001 from the front end of the puncture needle 6, and the air pressure inside the first trachea C4201 will drop rapidly and be fed back to the air pressure sensor 4. The current air pressure is displayed on the display screen 16 through a waveform diagram. The control system collects the signal of the air pressure sensor 4 and uses it to determine whether the puncture needle 6 has reached the epidural space 1001. Then, a corresponding alarm or light prompt is made through the display screen 16 and / or the warning component, and the peristaltic pump 301 is stopped immediately to prevent too much gas from entering the epidural space. It should be pointed out that even if there is fluid accumulation in the epidural space 1001, the gas will enter the epidural space 1001 from the front end of the puncture needle 6, and the air pressure inside the first trachea C4201 will drop rapidly and be fed back to the air pressure sensor 4.

[0085] Example 4

[0086] like Fig.16 and Fig.17 This embodiment refers to the working principle of embodiment 1, with the following differences:

[0087] It also includes a force sensor for detecting the axial puncture resistance of the puncture needle. One end of the force sensor is connected to the movable handle, and the other end of the force sensor is connected to the tail of the puncture needle.

[0088] The force sensor and the housing are connected by a cable or wireless communication. The display screen also displays a waveform of the axial puncture resistance, which displays a resistance change waveform collected by the force sensor.

[0089] The first quick connector is connected to one end of the force sensor through a second quick connector assembly, and the second quick connector assembly is a plug-in structure or a snap-on structure.

[0090] The second quick-connect assembly connects one end of the force sensor to the first quick-connect connector via a sterilization isolation sleeve, and the sterilization isolation sleeve is made of a plastic film and sterilized.

[0091] A force measuring module can be added to the anesthesia needle puncture auxiliary tool. The force measuring module is mainly composed of a movable handle 18 and a force sensor 13. The force sensor 13 is arranged in the movable handle 18. A cable is connected to the back side of the movable handle 18, and the other end of the cable is fixedly connected to the main unit of the lumbar puncture auxiliary device.

[0092] Alternatively, the movable handle 18 is provided with a battery, and communicates with a host of the lumbar puncture assisting device by wireless communication, and feeds back the measured force signal to the lumbar puncture assisting device.

[0093] When using a cable for connection, the isolation bag 17 will first be used to wrap and isolate the movable handle from the cable (or when wireless communication is used, only the isolation bag 17 will be used to wrap and isolate the movable handle), and then the snap seat 14 will be installed at the front end (force measuring end) of the force sensor 13, and the other end connected to the trachea 9 will be fixed to the trachea quick connector 15. The trachea quick connector 15 can be quickly installed and fixed to the snap seat 14, and then the puncture needle 6 will be connected to the trachea quick connector 15.

[0094] When puncturing, the movable handle 18 is held to work. When the puncture needle 6 penetrates the human tissue, it will encounter resistance, and the puncture force is measured in real time through the force sensor 13. When it reaches the target position, there will be a "feeling of missing". At this time, the puncture depth of the current puncture needle is fed back based on the change in the puncture force, and combined with the information of the air pressure change, it is finally determined whether the puncture has reached the target position. The display screen 16 also displays a waveform of the axial puncture resistance, and the waveform of the axial puncture resistance displays the resistance value collected by the force sensor.

[0095] Example 5

[0096] A method for using an anesthesia needle puncture auxiliary tool based on air pressure detection comprises the following steps:

[0097] (1) Connect the sterilized trachea to the puncture needle;

[0098] (2) Start the air pressure fluctuation component to inflate and / or inhale the puncture needle through the connecting air tube. The operator holds the tail of the puncture needle and inserts the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the connecting air tube. When the puncture needle enters the target position of the target object, the needle tip loses its obstruction, and part of the gas will enter / exit the target position from the front end of the puncture needle. The pressure in the connecting air tube changes accordingly. The air pressure detection component detects that the air tube has become stable again, determines whether the puncture needle has reached the target position of the target object, and then makes a corresponding prompt.

[0099] If you want to check whether there is liquid in the cavity (to further determine the puncture location), you can click the relevant button or touch screen of the lumbar puncture auxiliary device. At this time, the air pressure fluctuation component starts to suck the gas in the connecting trachea. If there is liquid in the cavity at this time, the liquid will be drawn into the connecting trachea along the puncture needle within a certain period of time. Since the connecting trachea is made of transparent or translucent material, the doctor can observe the liquid through the connecting trachea and determine the current position of the puncture needle.

[0100] Example 6

[0101] A method for using an anesthesia needle puncture auxiliary tool based on air pressure detection comprises the following steps:

[0102] (1) Connect the sterilized trachea to the puncture needle;

[0103] (2) The air pressure fluctuation component is started to inflate and / or inhale the puncture needle through the trachea. The operator holds the movable handle to insert the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the trachea while the force sensor detects the axial puncture resistance of the puncture needle. When the puncture needle enters the target position of the target object, the needle tip loses the blockage. The current puncture depth of the puncture needle is fed back based on the gradient change of the puncture resistance. Combined with the information of the air pressure change, it is finally determined whether the puncture has reached the target position, and then a corresponding prompt is given.

[0104] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0105] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anesthesia needle puncture auxiliary tool based on air pressure detection, characterized in that: It includes a shell, an air pressure detection component and an air pressure fluctuation component. The air pressure fluctuation component and the air pressure detection component are connected through the puncture gas pipeline. The air pressure fluctuation component will inflate and / or inhale the puncture gas pipeline, and the air pressure detection component detects the air pressure changes in the puncture gas pipeline.

2. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 1, characterized in that: The air pressure fluctuation component is arranged on the housing, the puncture gas pipeline includes a connecting air tube and a puncture needle, the air pressure fluctuation component includes a syringe and a linear motion mechanism, the output port of the syringe is connected to the puncture needle air circuit through the connecting air tube, and the linear motion mechanism drives the piston of the syringe to reciprocate, thereby inflating and / or inhaling the puncture needle; Alternatively, the air pressure fluctuation component is a peristaltic pump, which is provided with a quick-change pressure plate, which can be manually controlled to open and close. When the quick-change pressure plate is opened, the middle part of the connecting air pipe can be placed in the gap between the quick-change pressure plate and the multiple groups of rollers, and then the quick-change pressure plate is closed. When the peristaltic pump is working, the multiple groups of rollers alternately squeeze the connecting air pipe, output and / or withdraw the squeezed gas in the connecting air pipe, and connect the connecting air pipe to the puncture needle air path.

3. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 2, characterized in that: The air pressure detection component is an air pressure sensor, and a display screen and / or a warning component is provided on the housing. The display screen and / or the warning component make corresponding alarms or lights to prompt that the puncture needle has entered the target position in the target object. The warning component is a buzzer or an alarm light, and the connecting air pipe is connected to the tail of the puncture needle through a first quick connector.

4. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 3, characterized in that: It also includes a force sensor for detecting the axial puncture resistance of the puncture needle. One end of the force sensor is connected to the movable handle, and the other end of the force sensor is connected to the tail of the puncture needle.

5. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 4, characterized in that: The force sensor and the housing are connected by a cable or wireless communication. The display screen also displays a waveform of the axial puncture resistance, which displays a resistance change waveform collected by the force sensor.

6. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 4, characterized in that: The first quick connector is connected to one end of the force sensor via a second quick connector assembly, and the second quick connector assembly is a plug-in structure or a snap-on structure.

7. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 6, characterized in that: The second quick-connect assembly connects one end of the force sensor to the first quick-connect connector via a sterilization isolation sleeve, and the sterilization isolation sleeve is made of a plastic film and sterilized.

8. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 3, characterized in that: The display screen also displays a waveform of air pressure, which displays a waveform of air pressure changes collected by the air pressure sensor.

9. The anesthesia needle puncture auxiliary tool based on air pressure detection according to claim 3, characterized in that: The outer shell is provided with an air pipe interface connected to the air pressure detection component, and the connecting air pipe includes a three-way joint, a first air pipe and a second air pipe. The three joints of the three-way joint are respectively connected to the first air pipe, the second air pipe and the air pipe interface, the second air pipe is connected to the air pressure fluctuation component, the first air pipe is connected to the puncture needle, the first air pipe is a flexible hose, and the length of the first air pipe exceeds 600mm.

10. A method for using an anesthesia needle puncture auxiliary tool based on air pressure detection, characterized in that: The following steps are involved: (1) Connect the sterilized trachea to the puncture needle; (2) The air pressure fluctuation component is started to inflate and / or inhale the puncture needle through the connecting air tube. The operator holds the tail of the puncture needle and inserts the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the connecting air tube. When the puncture needle enters the target position of the target object, the needle tip is unblocked, and part of the gas will enter / exit the target position from the front end of the puncture needle. The pressure in the connecting air tube changes accordingly. The air pressure detection component detects the pressure change, determines whether the puncture needle has reached the target position of the target object, and then makes a corresponding prompt; Alternatively, (1) connect the sterilized trachea to the puncture needle; (2) The air pressure fluctuation component is started to inflate and / or inhale the puncture needle through the trachea. The operator holds the movable handle to insert the puncture needle into the target object. The air pressure detection component detects the air pressure change inside the trachea while the force sensor detects the axial puncture resistance of the puncture needle. When the puncture needle enters the target position of the target object, the needle tip loses the blockage. Based on the change in puncture resistance, the current puncture depth of the puncture needle is fed back. Combined with the information on the air pressure change, it is finally determined whether the puncture has reached the target position, and then a corresponding prompt is given.

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