Pressure sensing injector with arachnoid puncture prevention function

Abstract

The invention relates to the technical field of syringes, and discloses a pressure sensing syringe with an arachnoid puncture prevention function, which comprises a needle body part, a pressure sensing part, a pressure sensing part and a pressure sensing part, and the needle body part comprises a needle cylinder, a push rod, a piston body and a needle head; the prevention mechanism is arranged on the needle body part and used for giving out a prompt when the needle body part penetrates through the ligamentum flavum and enters the outer space of the arachnoid; the constant pressure mechanism is arranged on the needle body part and used for providing set constant pushing force; the display mechanism is arranged on the constant pressure mechanism and used for displaying the magnitude of the pushing force; the prevention mechanism comprises a pre-feeding groove. According to the pressure sensing syringe with the arachnoid puncture prevention function, by means of the arrangement of the prevention mechanism, through the linkage of the pressure change of the closed liquid medicine cavity and the release of the elastic potential energy of the first spring, the visual prompt that the warning lamp turns off from light when the syringe needle enters the outer cavity of the arachnoid is achieved, and the risk that the arachnoid is damaged in the puncture process can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of syringes, in particular to a pressure-sensing syringe with a function of preventing arachnoid membrane rupture. Background Art

[0002] A syringe is a common medical device, mainly used to inject liquid or gas into the human body or extract liquid from the body. It consists of a needle, a syringe, a piston and other parts, and the liquid is inhaled and discharged by pushing and pulling the piston.

[0003] Traditional subarachnoid puncture or epidural anesthesia procedures lack real-time, intuitive puncture position feedback. Operators rely primarily on the feel of resistance changes to determine whether the needle has penetrated the ligamentum flavum and entered the extraarachnoid space. The "breakthrough" sensation of a sudden decrease in tissue resistance as the needle passes through the ligamentum flavum is often difficult to accurately capture. This can be particularly challenging for inexperienced operators, who can delay or misjudge the needle, leading to further puncture and damage to the arachnoid membrane, potentially causing complications such as cerebrospinal fluid leakage, headaches, and infection. Summary of the Invention

[0004] Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a pressure-sensing syringe with arachnoid puncture prevention function, which solves the problem that in traditional subarachnoid puncture or epidural anesthesia operations, due to the lack of a real-time and intuitive puncture position feedback mechanism, the operator is prone to misjudgment due to changes in hand-felt resistance, leading to arachnoid damage and complications.

[0005] (2) Technical solution To achieve the above-mentioned object, the present invention provides the following technical solutions: a pressure-sensing syringe with a function of preventing arachnoid puncture, comprising: a needle body, the needle body comprising: a syringe, a push rod, a piston body, and a needle; a prevention mechanism, the prevention mechanism being arranged on the needle body, and being used to issue a reminder when the needle body passes through the yellow ligament and enters the extraarachnoid space; a constant pressure mechanism, the constant pressure mechanism being arranged on the needle body, and being used to provide a set constant driving force; a display mechanism, the display mechanism being arranged on the constant pressure mechanism, and being used to display the magnitude of the driving force; the prevention mechanism comprising: a pre-feed groove, the pre-feed groove being arranged on the inner wall of the syringe, and a threaded rod being threadedly connected to the inner wall of the syringe. The end of the threaded rod one close to the pre-feed groove is rotatably connected to a sealing block, and the sealing block piston is connected to the inner wall of the syringe, and a pressure groove is provided on the inner wall of the syringe, and a threaded rod two is threadedly connected to the inner wall of the syringe, one end of the threaded rod two is fixedly connected to a positioning disc block, and the other end of the threaded rod two is fixedly connected to a hollow block, and a long shaft is slidably connected to the inner wall of the threaded rod two, one end of the long shaft is fixedly connected to a power supply, and the other end of the long shaft is fixedly connected to a movable disc block, a spring is provided between the movable disc block and the positioning disc block, a warning light is connected to the hollow block, and the movable disc block is connected to the pressure groove piston.

[0006] Preferably, one end of the spring 1 is fixedly connected to the movable disc block, and the other end of the spring 1 is fixedly connected to the positioning disc block.

[0007] Preferably, the power supply includes a lithium battery and a second spring, one end of the second spring is fixedly connected to the lithium battery, the other end of the second spring is fixedly connected to a conductor block, a telescopic conductor column is provided between the conductor block and the electrode on the lithium battery, a charging port is provided on the lithium battery, and a through hole is opened on the side of the hollow block for leakage of the charging port.

[0008] Preferably, the piston on the inner wall of the syringe is connected to a push rod, the push rod is connected to a piston body, the outer wall of the piston body is connected to the inner wall piston of the syringe, and the output end of the syringe is connected to a needle.

[0009] Preferably, the constant pressure mechanism includes a hose, one end of the hose is connected to the syringe, the other end of the hose is connected to a hollow base, a telescopic tube is provided on the hollow base, one end of the telescopic tube is fixedly connected to the hollow base, the other end of the telescopic tube is fixedly connected to a hollow top plate, the hollow top plate is slidably connected to the inner wall of the open outer frame, the inner wall of the open outer frame is fixedly connected to the hollow base, a raised block is fixedly connected to the side of the hollow top plate, a through rod is fixedly connected to the inner wall of the open outer frame, a limiting block is slidably connected to the through rod, a threaded rod three is threadedly connected to the limit block, a scale one is provided on the outer wall of the open outer frame, an arrow is provided on the limit block, and the top of the hollow top plate is used to place weights.

[0010] Preferably, the display mechanism includes a transparent hollow bar, which is fixedly connected to the hollow top plate, and a scale gauge 2 is provided on the transparent hollow bar. A piston on the inner wall of the transparent hollow bar is connected to a sealed block, and a spring 3 is provided between the sealed block and the inner wall of the transparent hollow bar, one end of the spring 3 is fixedly connected to the inner wall of the transparent hollow bar, and the other end of the spring 3 is fixedly connected to the sealed block.

[0011] Preferably, a knob portion is provided at one end of the threaded rod away from the sealing block, and an elastic sealing ring is sleeved on the outer circumference of the sealing block, and the sealing ring is interference fit with the inner wall of the syringe.

[0012] Preferably, an insulating sleeve is provided on the outer peripheral surface of the lithium battery, and the insulating sleeve is slidably connected to the inner wall of the hollow block.

[0013] Preferably, the outer peripheral surface of the push rod is provided with anti-slip convex grooves, and the end thereof away from the piston body is provided with a push handle, and the diameter of the push handle is larger than the diameter of the push rod.

[0014] (3) Beneficial effects Compared with the prior art, the present invention provides a pressure-sensing syringe with arachnoid puncture prevention function, which has the following beneficial effects: 1. This pressure-sensing syringe with arachnoid puncture prevention function utilizes a prevention mechanism to achieve an intuitive prompt of a warning light turning from bright to off when the needle enters the extraarachnoid space by linking the pressure change of the closed liquid chamber with the release of elastic potential energy of a spring. This can effectively avoid the risk of damage to the arachnoid membrane during puncture, provide the operator with real-time and clear feedback on the puncture position, and effectively solve the problem of arachnoid damage and complications caused by the lack of this mechanism in traditional operations.

[0015] 2. This pressure-sensing syringe with arachnoid rupture prevention function uses a constant pressure mechanism to drive the telescopic tube through the weight of the weight to generate constant pressure, and combines the limit block to preset the injection volume to achieve uniform injection speed and precise dosage control of the liquid medicine, thereby improving the stability and controllability of the injection process.

[0016] 3. This pressure-sensing syringe with arachnoid rupture prevention function utilizes a display mechanism to convert the pressure in the telescopic tube into an intuitive mechanical displacement indication through the correspondence between the displacement of the sealing block in the transparent hollow bar and the second scale, thereby facilitating real-time monitoring of the injection pushing force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a structural schematic diagram of the cross section of the syringe of the present invention; Figure 3 This is a schematic structural diagram of the pre-feed tank of the present invention; Figure 4 Schematic diagram of the cross-section of the hollow block of the present invention; Figure 5 It is a structural schematic diagram of the warning light of the present invention; Figure 6 Schematic diagram of the structure of the power supply of the present invention; Figure 7 It is a structural schematic diagram of the cross section of the opening outer frame of the present invention; Figure 8 This is a structural diagram of the side surface of the opening outer frame of the present invention; Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at A in the middle; Figure 10 It is a structural schematic diagram of the cross section of the transparent hollow strip of the present invention.

[0018] In the figure: 1, needle body; 11, syringe; 12, push rod; 13, piston body; 14, needle; 2, prevention mechanism; 21, pre-feed groove; 22, threaded rod 1; 23, sealing block; 24, pressure groove; 25, threaded rod 2; 26, positioning disc block; 27, spring 1; 28, movable disc block; 29, long shaft; 210, power supply; 2101, lithium battery; 2102, spring 2; 2103, conductor block; 2104, extension Retractable conductor column; 2105, charging port; 211, warning light; 212, hollow block; 3, constant pressure mechanism; 31, hose; 32, hollow base; 33, telescopic tube; 34, hollow top plate; 35, opening outer frame; 36, raised block; 37, through rod; 38, limit block; 39, scale one; 310, threaded rod three; 4, display mechanism; 41, transparent hollow bar; 42, scale two; 43, sealed block; 44, spring three. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-10, a pressure-sensing syringe with a function of preventing arachnoid puncture, comprising: a needle body 1, the needle body 1 comprising: a syringe 11, a push rod 12, a piston body 13, and a needle 14; a prevention mechanism 2, the prevention mechanism 2 being arranged on the needle body 1, for issuing a reminder when the needle body 1 passes through the yellow ligament and enters the arachnoid extracavity; a constant pressure mechanism 3, the constant pressure mechanism 3 being arranged on the needle body 1, for providing a set constant driving force; a display mechanism 4, the display mechanism 4 being arranged on the constant pressure mechanism 3, for displaying the magnitude of the driving force; the prevention mechanism 2 comprising: a pre-feed groove 21, the pre-feed groove 21 being arranged on the inner wall of the syringe 11, a threaded rod 22 being threadedly connected to the inner wall of the syringe 11, a sealing block 23 being rotatably connected to one end of the threaded rod 22 close to the pre-feed groove 21, and the sealing block 23 The piston is connected to the inner wall of the syringe 11. A pressure groove 24 is provided on the inner wall of the syringe 11. A threaded rod 25 is threadedly connected to the inner wall of the syringe 11. One end of the threaded rod 25 is fixedly connected to a positioning disc block 26. The other end of the threaded rod 25 is fixedly connected to a hollow block 212. A long shaft 29 is slidably connected to the inner wall of the threaded rod 25. One end of the long shaft 29 is fixedly connected to a power supply 210. The other end of the long shaft 29 is fixedly connected to a movable disc block 28. A spring 27 is provided between the movable disc block 28 and the positioning disc block 26. A warning light 211 is connected to the hollow block 212. The movable disc block 28 is connected to the piston of the pressure groove 24. After the needle 14 is initially inserted into the human body, the sealing block 23 is pushed by rotating the threaded rod 22. Pre-injection groove 21 is blocked, forming a closed liquid medicine chamber between it and needle 14. One end is mechanically blocked by sealing block 23, and the other end is naturally blocked by human tissue. Rotating hollow block 212 drives threaded rod 25, pushing positioning disc 26 toward pre-injection groove 21, compressing spring 1 27 and movable disc 28. The liquid medicine in the closed liquid medicine chamber is compressed, gradually increasing the pressure. Simultaneously, spring 1 27 is compressed, storing elastic potential energy. When the movable disc block 28 moves, it drives the power supply 210 to move synchronously through the long shaft 29, so that the power supply 210 and the warning light 211 form a closed circuit. The warning light 211 lights up, which is a "pre-compression completed" prompt, not a puncture in place signal. When the needle 14 continues to advance and passes through the yellow ligament into the extraarachnoid space, the resistance of the human tissue suddenly disappears. The pressure difference between the epidural space and the extraarachnoid space causes the resistance to drop sharply. The pressure in the closed liquid medicine cavity is instantly released through the needle 14, and the liquid medicine partially flows into the extraarachnoid space. At this time, the elastic potential energy of the spring 1 27 is released, pushing the movable disc block 28 to move in the opposite direction, driving the long shaft 29 and the power supply 210 When the operator moves away from the warning light 211 and the power source 210 is moved, the circuit is disconnected and the warning light 211 turns off, prompting the operator that "the operator has entered the safe area, the extraarachnoid space", to avoid further puncture and damage to the arachnoid membrane. At this time, the threaded rod 22 is rotated to drive the sealing block 23 away from the pre-introduction groove 21. At this time, the piston body 13 is driven by the push rod 12 to perform the injection operation.

[0021] One end of spring 1 27 is fixedly connected to the movable disc block 28 , and the other end of spring 1 27 is fixedly connected to the positioning disc block 26 .

[0022] The power supply 210 includes a lithium battery 2101 and a second spring 2102. One end of the second spring 2102 is fixedly connected to the lithium battery 2101. The other end of the second spring 2102 is fixedly connected to a conductor block 2103. A telescopic conductor column 2104 is provided between the conductor block 2103 and the electrode on the lithium battery 2101. The lithium battery 2101 is provided with a charging port 2105. A through hole is provided on the side of the hollow block 212 for leakage of the charging port 2105. The second spring 2102 pushes the conductor block 2103 to tightly contact the telescopic conductor column 2104 through elastic deformation. The second spring 2102 can buffer the impact of displacement, making the separation and contact process between the conductor block 2103 and the telescopic conductor column 2104 smoother, thus avoiding false triggering of the circuit. The lithium battery 2101 serves as an independent power supply and can drive the warning light 211 without an external power supply, thus meeting the needs of portable use. The charging port 2105 is exposed through the through hole on the side of the hollow block 212, supports repeated charging, and reduces the cost of consumables.

[0023] The inner wall of the syringe 11 is connected to a push rod 12 , the push rod 12 is connected to a piston body 13 , the outer wall of the piston body 13 is connected to the inner wall of the syringe 11 , and the output end of the syringe 11 is connected to a needle 14 .

[0024] The constant pressure mechanism 3 includes a hose 31, one end of the hose 31 is connected to the syringe 11, the other end of the hose 31 is connected to a hollow base 32, a telescopic tube 33 is provided on the hollow base 32, one end of the telescopic tube 33 is fixedly connected to the hollow base 32, the other end of the telescopic tube 33 is fixedly connected to a hollow top plate 34, the hollow top plate 34 is slidably connected to the inner wall of the open outer frame 35, the inner wall of the open outer frame 35 is fixedly connected to the hollow base 32, a raised block 36 is fixedly connected to the side of the hollow top plate 34, a through rod 37 is fixedly connected to the inner wall of the open outer frame 35, a limited block 38 is slidably connected to the through rod 37, a threaded rod 310 is threadedly connected to the limit block 38, and a scale is provided on the outer wall of the open outer frame 35. 39. An arrow is set on the limit block 38. The top of the hollow top plate 34 is used to place weights. According to the required constant pressure, a weight of corresponding weight is placed on the top of the hollow top plate 34. The weight pushes the hollow top plate 34 to slide downward along the inner wall of the outer frame, compressing the telescopic tube 33. The pressure in the tube is transmitted to the syringe 11 through the hollow base 32 and the hose 31, driving the piston body 13 to inject the medicine at a uniform speed, moving the limit block 38 to the appropriate position on the scale 1 39. At this time, the threaded rod 310 is rotated so that the threaded rod 310 contacts the through rod 37 to position the limit block 38. When the hollow top plate 34 moves downward, it drives the raised block 36 to move synchronously until the raised block 36 contacts the limit block 38, which plays the role of presetting the injection volume in advance.

[0025] The display mechanism 4 includes a transparent hollow bar 41, which is fixedly connected to the hollow top plate 34. A scale gauge 2 42 is provided on the transparent hollow bar 41. A piston on the inner wall of the transparent hollow bar 41 is connected to a sealed block 43. A spring 3 44 is provided between the sealed block 43 and the inner wall of the transparent hollow bar 41. One end of the spring 3 44 is fixedly connected to the inner wall of the transparent hollow bar 41, and the other end of the spring 3 44 is fixedly connected to the sealed block 43. When the telescopic tube 33 is compressed by the hollow top plate 34, the pressure in the tube passes through the hollow base 32 → hose 31 → the internal channel of the hollow top plate 34, and is finally transmitted to the closed chamber of the transparent hollow bar 41. The pressure P in the telescopic tube 33 acts on the bottom surface of the sealed block 43, so that the sealed block 43 compresses the spring 3 44 and moves upward. When the sealed block 43 moves to the scale on the corresponding scale gauge 2 42, the pushing force in the syringe 11 can be intuitively observed.

[0026] A knob portion is provided at the end of the threaded rod 22 away from the sealing block 23, and an elastic sealing ring is provided on the outer circumference of the sealing block 23. The sealing ring is interference fit with the inner wall of the syringe 11, and an insulating sleeve is provided on the outer circumference of the lithium battery 2101. The insulating sleeve is slidably connected to the inner wall of the hollow block 212. The outer circumference of the push rod 12 is provided with anti-slip ridges, and a push handle is provided on the end away from the piston body 13. The diameter of the push handle is larger than the diameter of the push rod 12.

[0027] In summary, this pressure-sensing syringe with arachnoid puncture prevention function, when used, after needle 14 is initially inserted into the body, threaded rod 1 (22) rotates, pushing sealing block 23 to block pre-introduction groove 21. This creates a closed liquid medicine chamber between pre-introduction groove 21 and needle 14, one end mechanically blocked by sealing block 23 and the other end naturally blocked by human tissue. Rotating hollow block 212 then rotates threaded rod 2 (25), pushing positioning disc 26 toward pre-introduction groove 21, compressing spring 1 (27) and movable disc 28. The liquid medicine in the closed liquid medicine chamber is compressed, gradually increasing the pressure, while spring 1 (27) is compressed, storing elastic potential energy. When the movable disc block 28 moves, it drives the power supply 210 to move synchronously through the long shaft 29, so that the power supply 210 and the warning light 211 form a closed circuit. The warning light 211 lights up, which is a "pre-compression completed" prompt, not a puncture in place signal. When the needle 14 continues to advance and passes through the yellow ligament into the extraarachnoid space, the resistance of the human tissue suddenly disappears. The pressure difference between the epidural space and the extraarachnoid space causes the resistance to drop sharply. The pressure in the closed liquid medicine cavity is instantly released through the needle 14, and the liquid medicine partially flows into the extraarachnoid space. At this time, the elastic potential energy of the spring 1 27 is released, pushing the movable disc block 28 to move in the opposite direction, driving the long shaft 29 and the power supply 210 When the operator moves away from the warning light 211 and the power source 210 is moved, the circuit is disconnected and the warning light 211 turns off, prompting the operator that "the operator has entered the safe area, the extraarachnoid space", to avoid further puncture and damage to the arachnoid membrane, and providing the operator with real-time and clear feedback on the puncture position, effectively solving the problem of arachnoid damage and complications caused by the lack of this mechanism in traditional operations. At this time, the threaded rod 22 is rotated to drive the sealing block 23 away from the pre-entry groove 21, and the piston body 13 is driven by the push rod 12 to perform the injection operation.

[0028] According to the required constant pressure, a weight of corresponding weight is placed on the top of the hollow top plate 34. The weight pushes the hollow top plate 34 to slide downward along the inner wall of the outer frame, compressing the telescopic tube 33. The pressure in the tube is transmitted to the syringe 11 through the hollow base 32 and the hose 31, driving the piston body 13 to inject the liquid medicine at a uniform speed, moving the limit block 38 to the appropriate position on the scale 1 39. At this time, the threaded rod 310 is rotated so that the threaded rod 310 contacts the through rod 37 to position the limit block 38. When the hollow top plate 34 moves downward, the raised block 36 is driven to move synchronously until the raised block 36 contacts the limit block 38, thereby presetting the injection volume.

[0029] When the telescopic tube 33 is compressed by the hollow top plate 34, the pressure in the tube is transmitted through the hollow base 32 → hose 31 → the internal channel of the hollow top plate 34, and finally to the closed chamber of the transparent hollow bar 41. The pressure P in the telescopic tube 33 acts on the bottom surface of the sealing block 43, causing the sealing block 43 to compress the spring three 44 and move it upward. When the sealing block 43 moves to the corresponding scale on the scale two 42, the driving force in the syringe 11 can be intuitively observed.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A pressure-sensing syringe with a function of preventing arachnoid puncture, characterized in that: include: A needle body component (1), the needle body component (1) comprising: a syringe (11), a push rod (12), a piston body (13), and a needle head (14); a prevention mechanism (2), the prevention mechanism (2) being arranged on the needle body (1) and configured to issue a warning when the needle body (1) passes through the ligamentum flavum and enters the extraarachnoid space; A constant pressure mechanism (3), the constant pressure mechanism (3) being arranged on the needle body (1) and being used to provide a set constant pushing force; A display mechanism (4), the display mechanism (4) being arranged on the constant pressure mechanism (3) and being used to display the magnitude of the driving force; The prevention mechanism (2) comprises: A pre-feed groove (21) is provided on the inner wall of the syringe (11), a threaded rod (22) is threadedly connected to the inner wall of the syringe (11), and a sealing block (23) is rotatably connected to one end of the threaded rod (22) close to the pre-feed groove (21), and a piston of the sealing block (23) is connected to the inner wall of the syringe (11), and a pressure groove (24) is provided on the inner wall of the syringe (11), and a threaded rod (25) is threadedly connected to the inner wall of the syringe (11), and one end of the threaded rod (25) is fixedly connected to a positioning disc block (26). ), the other end of the second threaded rod (25) is fixedly connected to a hollow block (212), the inner wall of the second threaded rod (25) is slidably connected to a long shaft (29), one end of the long shaft (29) is fixedly connected to a power source (210), the other end of the long shaft (29) is fixedly connected to a movable disc block (28), a spring (27) is provided between the movable disc block (28) and the positioning disc block (26), a warning light (211) is connected to the hollow block (212), and the movable disc block (28) is connected to the piston of the pressure groove (24).

2. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: One end of the spring 1 (27) is fixedly connected to the movable disc block (28), and the other end of the spring 1 (27) is fixedly connected to the positioning disc block (26).

3. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: The power supply (210) comprises a lithium battery (2101) and a second spring (2102), one end of the second spring (2102) being fixedly connected to the lithium battery (2101), the other end of the second spring (2102) being fixedly connected to a conductor block (2103), a telescopic conductor post (2104) being provided between the conductor block (2103) and an electrode on the lithium battery (2101), a charging port (2105) being provided on the lithium battery (2101), and a through hole being provided on a side surface of the hollow block (212) for leakage of the charging port (2105).

4. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: The piston on the inner wall of the syringe (11) is connected to a push rod (12), the push rod (12) is connected to a piston body (13), the outer wall of the piston body (13) is connected to the inner wall piston of the syringe (11), and the output end of the syringe (11) is connected to a needle (14).

5. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: The constant pressure mechanism (3) comprises a hose (31), one end of the hose (31) is connected to the syringe (11), the other end of the hose (31) is connected to a hollow base (32), a telescopic tube (33) is provided on the hollow base (32), one end of the telescopic tube (33) is fixedly connected to the hollow base (32), the other end of the telescopic tube (33) is fixedly connected to a hollow top plate (34), the hollow top plate (34) is slidably connected to the inner wall of the open outer frame (35), and the open outer frame (35) is provided with a telescopic tube (33). The inner wall of the opening outer frame (35) is fixedly connected to the hollow base (32), the side of the hollow top plate (34) is fixedly connected to a protruding block (36), the inner wall of the opening outer frame (35) is fixedly connected to a through rod (37), the through rod (37) is slidably connected to a limit block (38), the limit block (38) is threadedly connected to a threaded rod three (310), the outer wall of the opening outer frame (35) is provided with a scale one (39), the limit block (38) is provided with an arrow, and the top of the hollow top plate (34) is used for placing weights.

6. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: The display mechanism (4) includes a transparent hollow bar (41), the transparent hollow bar (41) is fixedly connected to the hollow top plate (34), a scale gauge 2 (42) is provided on the transparent hollow bar (41), a piston is connected to a sealing block (43) on the inner wall of the transparent hollow bar (41), a spring 3 (44) is provided between the sealing block (43) and the inner wall of the transparent hollow bar (41), one end of the spring 3 (44) is fixedly connected to the inner wall of the transparent hollow bar (41), and the other end of the spring 3 (44) is fixedly connected to the sealing block (43).

7. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 1, characterized in that: The end of the threaded rod (22) away from the sealing block (23) is provided with a knob portion, and the outer peripheral surface of the sealing block (23) is provided with an elastic sealing ring, and the sealing ring is interference-fitted with the inner wall of the syringe (11).

8. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 3, characterized in that: An insulating sleeve is provided on the outer peripheral surface of the lithium battery (2101), and the insulating sleeve is slidably connected to the inner wall of the hollow block (212).

9. The pressure-sensing syringe with arachnoid puncture prevention function according to claim 4, characterized in that: The outer peripheral surface of the push rod (12) is provided with anti-slip convex patterns, and an end thereof away from the piston body (13) is provided with a push handle, the diameter of the push handle being larger than the diameter of the push rod (12).

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