Negative pressure suction gun, manual negative pressure suction method

Abstract

The application discloses a kind of negative pressure suction gun, manual negative pressure suction method, it is related to biomedical engineering technical field, the gun handle of negative pressure suction gun is reciprocated and opened and closed to drive suction pumping section to reciprocate in negative pressure sedimentation cavity Negative pressure suction and extrusion pumping, negative pressure sedimentation cavity can pass through liquid suction pipe one-way liquid suction when negative pressure suction, negative pressure sedimentation cavity can be one-way liquid delivery to the liquid storage part when extrusion pumping, so as to be used for suction liquid and soft solid tissue in liquid by setting negative pressure sedimentation cavity, then by adjusting increase negative pressure suction force, the viscosity of solid tissue that can be sucked is also greater, so that the negative pressure suction gun of the application can not only be used for endometrial gynecological field liquid suction and solid tissue sampling, but also can be used for closed narrow space tumor biopsy, brain tissue and other solid-liquid components suction, during suction process, by rotating liquid suction pipe, the inlet slope of liquid suction pipe is realized 360 degree rotation, to avoid suction dead angle.

Description

Technical Field

[0001] This invention belongs to the field of biomedical engineering technology, and specifically relates to a negative pressure suction gun and a manual negative pressure suction method. Background Technology

[0002] In obstetric and gynecological surgeries, a certain amount of fluid often accumulates in the uterus or abdominal cavity due to tissue trauma, intraoperative irrigation, and the lesion itself. To promote postoperative recovery and reduce the risk of complications such as infection and adhesions, the fluid needs to be drained promptly. Currently, two main drainage methods are used clinically: one is active aspiration using negative pressure equipment during surgery to achieve rapid removal of the fluid; the other is passive drainage using an indwelling drainage tube after surgery to achieve continuous and gradual fluid removal.

[0003] Existing technologies, such as Chinese Patent No. CN117599270B, disclose a negative pressure aspirator that is easy to assemble, disassemble, clean, and not prone to clogging. This device consists of components such as a suction tube and a suction gun, and can actively drain intraoperative fluid through negative pressure aspiration. However, this device still has the following shortcomings: First, it lacks a precise control mechanism for the aspiration flow rate and negative pressure intensity. If the suction force is too high during the operation, it may cause tissue damage or discomfort to the patient. Second, the drained fluid is not subjected to solid-liquid separation treatment, which is not conducive to the sampling and pathological examination of the solid tissue or blood clots mixed in, affecting subsequent related drug research. Summary of the Invention

[0004] In response to the problems in related technologies, this invention proposes a negative pressure suction gun and a manual negative pressure suction method to overcome the aforementioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a negative pressure suction gun, comprising a gun body and a handle mounted on the gun body. The gun body is further equipped with a negative pressure suction unit, a suction tube, a storage unit, and a limit adjustment unit. The negative pressure suction unit is also provided with a negative pressure sedimentation chamber. The handle can drive the negative pressure suction unit to reciprocate between a suction state and a discharge state during the reciprocating opening and closing process. When the negative pressure suction unit enters the suction state, it can suction the accumulated liquid into the negative pressure sedimentation chamber through the suction tube. When the negative pressure suction unit enters the discharge state, it can also transport the accumulated liquid sucked into the negative pressure sedimentation chamber to the storage unit. The liquid storage section is equipped with a filter section, which can intercept and filter solid impurities in the liquid to achieve solid-liquid separation. The limiting adjustment part can limit the gun handle to increase or decrease the opening and closing stroke of the gun handle. When the opening and closing stroke of the gun handle increases, the liquid absorption of the negative pressure suction part increases simultaneously. When the opening and closing stroke of the gun handle decreases, the liquid absorption of the negative pressure suction part decreases simultaneously.

[0006] Preferably, the negative pressure suction unit includes a suction pumping unit, which is connected to the gun handle for transmission, so that when the gun handle reciprocates, it can drive the suction pumping unit to reciprocate to perform negative pressure suction and squeezing pumping in the negative pressure sedimentation chamber. When the negative pressure sedimentation chamber is suctioned under negative pressure, it can unidirectionally suction liquid through the suction pipe. When the negative pressure sedimentation chamber is squeezed and pumped, it can unidirectionally discharge the suctioned liquid to the storage unit.

[0007] Preferably, the negative pressure sedimentation chamber includes a suction cylinder, the inlet of which is connected to a suction pipe and a one-way valve is installed in the inlet, and the outlet of which is connected to a storage section and a one-way valve is installed in the outlet.

[0008] Preferably, the suction pumping unit includes a pressure chamber and a drive rod. The pressure chamber is located inside the gun body and communicates with a negative pressure sedimentation chamber. A piston is slidably installed inside the pressure chamber. A piston rod is fixedly installed at one end of the piston. The drive rod is rotatably installed inside the gun body, with one end connected to the piston rod and the other end connected to the top of the gun handle. The gun handle is rotatably installed on the gun body via a pin. When the gun handle rotates around the pin, it can drive the piston to slide backward in the pressure chamber via the drive rod. The rear end of the piston is also abutted against an elastic reset member. When the gun handle is released, the elastic reset member can drive the piston to move forward and reset in the pressure chamber. The elastic reset member includes a reset spring, which is fitted onto the piston rod and abuts against the rear end of the piston. An upper drive column is fixedly installed on the piston rod, and a lower drive column is fixedly installed at the top of the gun handle. Both ends of the drive rod are provided with connecting guide grooves, and the upper and lower drive columns are slidably engaged in the corresponding connecting guide grooves.

[0009] Preferably, the limiting adjustment part includes an abutting limiting member, which is installed on the gun body and located at the rear end of the piston rod's movement trajectory, so that the abutting limiting member can abut and limit the piston rod when the piston rod moves backward, and the abutting limiting member can be adjusted horizontally on the gun body to adjust the distance between the abutting limiting member and the piston rod, thereby adjusting the piston rod's movement stroke; the abutting limiting member includes a limiting bolt, which is threadedly rotatably installed at the end of the gun body, and a rotating head is fixedly installed on the outer end of the limiting bolt.

[0010] Preferably, the limiting adjustment part further includes a limiting strip and a support shaft. The limiting strip is rotatably mounted on the gun handle via the support shaft. The bottom surface of the limiting strip is provided with a plurality of ratchet teeth arranged in an arc shape. The gun body is provided with a through hole for the limiting strip to pass through. The bottom surface of the through hole is provided with limiting teeth that can engage with the ratchet teeth. The limiting strip can be adjusted between a limited state and a non-limited state. When the limiting strip is in the limited state, the limiting end of the limiting strip is elastically pressed down to make the ratchet teeth and the limiting teeth engage. When the limiting strip is in the non-limited state, the limiting end of the limiting strip is lifted up to make the ratchet teeth and the limiting teeth separate.

[0011] Preferably, an elastic telescopic member is abutted and installed on the top surface of the limiting end of the limiting strip. The elastic telescopic member can drive the limiting end of the limiting strip to rotate downward through elastic force, so that the limiting strip enters the limiting state. A buckle is rotatably installed on the gun handle. The top surface of the outer end of the limiting strip is provided with a slot that can engage with the buckle. When the buckle is engaged in the slot, the buckle can overcome the elastic driving force of the elastic telescopic member to keep the limiting end of the limiting strip in a raised state, thereby keeping the limiting strip in a non-limited state. The elastic telescopic member includes a limiting post, which is fixedly installed on the top surface of the limiting end of the limiting strip. A pressure spring is fitted on the limiting post, and the bottom end of the pressure spring abuts against the top surface of the limiting strip.

[0012] Preferably, the liquid storage section includes a liquid storage bottle and a connector. The connector is fixedly installed on the liquid outlet of the negative pressure suction section, and the liquid storage bottle is detachably and sealedly installed on the connector. Multiple connecting posts are fixedly installed on the outer ring of the connector, and multiple connecting grooves corresponding to the connecting posts are provided in the bottle mouth of the liquid storage bottle. The connecting grooves can slide and engage with the connecting posts. The liquid storage bottle is equipped with a filter bag inside. The opening of the filter bag overlaps with a protrusion inside the opening of the liquid storage bottle. When the liquid storage bottle is installed on the connector, the protrusion can cooperate with the connector to clamp the opening of the filter bag. The bottom of the storage bottle is also provided with a drain port, and a drain valve is connected to the bottom of the drain port. A drain pipe is connected to the outlet end of the drain valve.

[0013] Preferably, the suction tube is inserted into the inlet of the negative pressure suction unit, and the front end of the suction tube is provided with an oblique suction port. A knob is fixedly installed on the rear end of the suction tube. The knob can drive the suction tube to rotate relative to the negative pressure suction unit to adjust the direction of the oblique suction port.

[0014] This invention also discloses a manual negative pressure suction method, the specific steps of which are as follows: Place the suction end of the suction tube in the suction position, and press the handle back and forth with your hand to open and close the handle. During the reciprocating opening and closing process, the gun handle drives the negative pressure suction unit to reciprocate between the liquid suction state and the liquid discharge state. When the negative pressure suction unit enters the liquid suction state, it sucks up the accumulated liquid through the suction tube. When the negative pressure suction unit enters the liquid discharge state, it transports the sucked accumulated liquid to the liquid storage unit. The liquid storage section uses an internal filtration section to intercept and filter solid impurities in the liquid, thereby achieving solid-liquid separation. The gun handle is adjusted by the limit adjustment part, which gradually reduces the opening and closing stroke of the gun handle, thereby gradually reducing the amount of liquid absorbed by the negative pressure suction part until the liquid absorption process is completed.

[0015] The present invention has the following beneficial effects: In this invention, the suction tube extends through a medical sheath to the location of fluid accumulation in the patient's body. The reciprocating opening and closing of the suction handle drives the negative pressure suction unit to repeatedly aspirate and drain fluid, thus enabling the active suction and rapid removal of the accumulated fluid. The opening and closing stroke of the suction handle can be adjusted via a limiting adjustment unit, thereby regulating the suction volume and the magnitude of the negative pressure during suction. This prevents excessive suction and reduces the risk of irreversible damage to the patient's endometrial tissue caused by excessive negative pressure. Specifically, in the initial stage of suction when there is a large amount of fluid in the patient's body, the suction volume and negative pressure can be appropriately increased to improve the drainage speed. As the fluid gradually decreases, the suction volume and negative pressure can be decreased to slow down the drainage speed. This balances the drainage speed with patient comfort and safety, ensuring both timely fluid removal and safety and patient comfort during the procedure.

[0016] This invention also includes a limiting strip within the limiting adjustment section, adjustable between a limited state and a non-limited state. During normal fluid aspiration and drainage, the limiting strip is in the non-limited state, allowing the gun handle to stably aspirate and drain fluid. When the accumulated fluid is about to be drained and slow, precise drainage is required, or when precise drainage of the lesion is needed, the limiting strip can be adjusted to the limited state. At this time, the limiting end of the limiting strip is elastically pressed down, causing the ratchet and the limiting tooth to engage. As the gun handle gradually closes, it drives negative pressure. When the suction unit is aspirating, the ratchet and limiting teeth flexibly limit the handle through the limiting bevel, so that medical staff can perceive the distance of the handle's displacement and closing, preventing the handle from closing too quickly and causing excessive instantaneous suction force that could damage or cause discomfort to the patient's tissues. When the handle is released, the ratchet and limiting teeth work together to lock the handle, preventing it from resetting and opening. Then, by slowly and continuously closing the handle, the negative pressure suction unit is driven to slowly aspirate the liquid, so as to accurately control and measure the aspirated volume, thereby improving the aspiration effect.

[0017] This invention incorporates a filtration section within the fluid storage compartment. This filtration section separates solid tissues or blood clots mixed within the accumulated fluid, facilitating sample retention and pathological examination of the solid tissues or blood clots. This benefits subsequent drug research and prevents blockage of the drainage tube by solid tissues or blood clots during subsequent drainage, ensuring smooth drainage. Specifically, in hysteroscopy during obstetric and gynecological surgery, it is necessary to sample and send potentially diseased endometrial tissue for examination, i.e., endometrial biopsy. This medical procedure of obtaining endometrial tissue samples for pathological examination is primarily used to diagnose abnormal uterine bleeding, infertility, and endometrial cancer. For issues such as precancerous lesions, traditional sampling methods involve hysteroscopic biopsy using forceps or electric aspirators. Both methods require repeated entry and exit from the uterine cavity to collect samples from different locations. However, the negative pressure aspiration gun of this invention can aspirate solid endometrial tissue from multiple points within the uterine cavity after distension with uterine distension fluid. The sample is then separated into solid and liquid components in the subsequent negative pressure sedimentation chamber and reservoir bottle for solid tissue sampling. When collecting samples from different locations, only the reservoir bottle needs to be changed externally, eliminating the need for repeated entry and exit from the uterine cavity. Furthermore, this aspiration device allows for precise control of negative pressure, minimizing the risk of damaging the tissue at the sampling site.

[0018] In this invention, the negative pressure suction unit includes a suction pumping unit and a negative pressure sedimentation chamber. The suction pumping unit is connected to the gun handle for transmission, so that when the gun handle reciprocates, it drives the suction pumping unit to perform reciprocating negative pressure suction and squeezing pumping in the negative pressure sedimentation chamber. When the negative pressure sedimentation chamber is suctioned under negative pressure, it can unidirectionally aspirate liquid through the suction tube. When the negative pressure sedimentation chamber is squeezed and pumped, it can unidirectionally drain the aspirated liquid and transport it to the storage unit. Thus, by setting up a negative pressure sedimentation chamber, it can be used to aspirate liquids and soft solid tissues in liquids. By adjusting and increasing the negative pressure suction, the viscosity of the solid tissues that can be aspirated is also increased. This makes the negative pressure suction gun of this application not only suitable for aspirating fluid accumulation and sampling solid tissues in the field of endometriosis and gynecology, but also for aspirating solid and liquid components such as tumor biopsies and brain tissue in confined and narrow spaces. Therefore, the negative pressure suction gun of this invention is suitable for both liquid aspiration and aspiration of mixtures of liquids and solids, thus improving its applicability.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is one of the three-dimensional structural schematic diagrams of the negative pressure suction gun of the present invention; Figure 2 This is the second three-dimensional structural schematic diagram of the negative pressure suction gun of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram at point A; Figure 4 This is a side view of the negative pressure suction gun of the present invention; Figure 5 This is the third three-dimensional structural schematic diagram of the negative pressure suction gun of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram at point B; Figure 7 This is one of the internal structural diagrams of the negative pressure suction gun of the present invention; Figure 8 For the present invention Figure 7 A magnified structural diagram at point C; Figure 9 This is the second schematic diagram of the internal structure of the negative pressure suction gun of the present invention; Figure 10 This is the fourth three-dimensional structural schematic diagram of the negative pressure suction gun of the present invention; Figure 11 For the present invention Figure 10 A magnified structural diagram at point D; Figure 12 This is the third schematic diagram of the internal structure of the negative pressure suction gun of the present invention; Figure 13 For the present invention Figure 12 A magnified structural diagram at point E; Figure 14 This is the fourth schematic diagram of the internal structure of the negative pressure suction gun of the present invention; Figure 15 This is a three-dimensional structural diagram of the suction tube of the present invention.

[0022] In the diagram: 1. Gun body; 11. Gun handle; 2. Negative pressure suction unit; 21. Suction cylinder; 22. Drain check valve; 23. Inlet check valve; 24. Piston; 25. Return spring; 26. Piston rod; 27. Drive rod; 28. Upper drive column; 29. ​​Connecting guide groove; 210. Lower drive column; 3. Suction tube; 31. Slanted suction port; 32. Knob; 4. Liquid storage unit; 41. Liquid storage bottle; 42. Drain valve; 43. Drain guide tube; 44. Connector; 45. Connecting column; 46. Connecting groove; 47. Filter bag; 5. Limit adjustment unit; 51. Limit bolt; 52. Limit strip; 53. Support shaft; 54. Racket; 55. Slot; 56. Buckle; 57. Limit post; 58. Pressure spring; 59. Limit tooth. Detailed Implementation

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example 1 Please see Figure 1 As shown, this embodiment is a negative pressure suction gun, including a gun body 1 and a gun handle 11 mounted on the gun body 1. The gun body 1 is also equipped with a negative pressure suction section 2, a suction tube 3, a liquid storage section 4, and a limit adjustment section 5. The negative pressure suction section 2 is provided with a negative pressure sedimentation chamber. The gun handle 11 can drive the negative pressure suction section 2 to reciprocate between a liquid suction state and a liquid discharge state during the reciprocating opening and closing process. When the negative pressure suction section 2 enters the liquid suction state, it can suck the accumulated liquid into the negative pressure sedimentation chamber through the suction tube 3. The negative pressure suction section 2 can also... When in the liquid discharge state, the accumulated liquid drawn into the negative pressure sedimentation chamber is transported to the liquid storage section 4; the liquid storage section 4 is equipped with a filter section, which can intercept and filter solid impurities in the accumulated liquid to achieve solid-liquid separation; the limit adjustment section 5 can limit the adjustment of the gun handle 11 to increase or decrease the opening and closing stroke of the gun handle 11. When the opening and closing stroke of the gun handle 11 increases, the liquid absorption of the negative pressure suction section 2 increases simultaneously. When the opening and closing stroke of the gun handle 11 decreases, the liquid absorption of the negative pressure suction section 2 decreases simultaneously.

[0026] When using this negative pressure suction gun, place the suction end of the suction tube 3 in the suction position, and press the handle 11 repeatedly by hand to open and close the handle 11. During the reciprocating opening and closing process, the handle 11 drives the negative pressure suction unit 2 to move back and forth between the suction state and the discharge state. When the negative pressure suction unit 2 enters the suction state, it sucks up the accumulated liquid through the suction tube 3. When the negative pressure suction unit 2 enters the discharge state, it transports the sucked accumulated liquid to the storage unit 4. The storage unit 4 uses an internal filter to intercept and filter solid impurities in the accumulated liquid to achieve solid-liquid separation. During the suction process, the limit adjustment unit 5 limits the handle 11, gradually reducing the opening and closing stroke of the handle 11, thereby gradually reducing the suction volume of the negative pressure suction unit 2 until the suction process is completed.

[0027] When the negative pressure suction gun is used to aspirate and drain fluid from a patient's body, the suction volume and suction force of the negative pressure suction unit 2 can be appropriately increased in the early stage when there is a large amount of fluid in the patient's body, so as to improve the drainage speed. As the fluid gradually decreases, the suction volume and suction force of the negative pressure suction unit 2 can be reduced to slow down the drainage speed and prevent excessive suction force from causing tissue damage or discomfort to the patient. In this way, a balance can be maintained between the drainage speed and the patient's comfort and safety, ensuring the timeliness of fluid removal while taking into account the safety and patient comfort during the operation. By installing a filter section inside the liquid storage section 4, solid tissues or blood clots mixed in the liquid can be filtered and separated, which facilitates the retention of samples of solid tissues or blood clots for pathological examination. It also prevents solid tissues or blood clots from clogging the drainage tube during subsequent drainage of the liquid storage section 4, ensuring smooth drainage.

[0028] Example 2 Please see Figure 1 , Figure 7 , Figure 9 As shown, the difference between this embodiment and the above embodiment is that the negative pressure suction unit 2 includes a suction pumping unit, which is connected to the gun handle 11 for transmission, so that when the gun handle 11 reciprocates, it can drive the suction pumping unit to reciprocate to perform negative pressure suction and squeezing pumping in the negative pressure sedimentation chamber. When the negative pressure sedimentation chamber is suctioned under negative pressure, it can unidirectionally suck liquid through the suction pipe 3. When the negative pressure sedimentation chamber is squeezed and pumped, it can unidirectionally discharge the sucked accumulated liquid to the liquid storage unit 4. Thus, through the cooperation of the gun handle 11, the negative pressure sedimentation chamber and the suction pumping unit, unidirectional liquid suction and discharge can be continuously performed.

[0029] Specifically, the negative pressure sedimentation chamber includes a suction cylinder 21, whose inlet is connected to the suction pipe 3 and is equipped with an inlet check valve 23. The outlet of the suction cylinder 21 is connected to the storage section 4 and is equipped with a discharge check valve 22. The suction pumping section includes a pressure chamber and a drive rod 27. The pressure chamber is located inside the gun body 1 and communicates with the negative pressure sedimentation chamber. A piston 24 is slidably installed inside the pressure chamber. A piston rod 26 is fixedly installed at one end of the piston 24. The drive rod 27 is rotatably installed inside the gun body 1, with one end connected to the piston rod 26 and the other end connected to the top of the gun handle 11. The gun handle 11 is rotatably installed on the gun body 1 via a pin. When the gun handle 11 rotates around the pin, it can drive the piston 24 to slide backward in the pressure chamber via the drive rod 27. The rear end of the piston 24 is also abutted against the elastic reset member. When the gun handle 11 is released, the elastic reset member can drive the piston 24 to move forward and reset in the pressure chamber. The elastic reset member includes a reset spring 25, which is fitted on the piston rod 26 and abuts against the rear end of the piston 24. An upper drive column 28 is fixedly installed on the piston rod 26, and a lower drive column 210 is fixedly installed at the top of the gun handle 11. Both ends of the drive rod 27 are provided with connecting guide grooves 29. The upper drive column 28 and the lower drive column 210 are respectively slidably locked in the corresponding connecting guide grooves 29. When the handle 11 is pressed and rotated towards the grip of the gun body 1, the top of the handle 11 moves to the left. At this time, the handle 11 drives the drive rod 27 to rotate clockwise via the lower drive column 210 at its top. Simultaneously, the drive rod 27 pulls the piston rod 26 to the right via the upper drive column 28, causing the piston rod 26 to drive the piston 24 to move to the right within the pressure chamber. At this time, the piston 24 generates a negative pressure suction force within the suction cylinder 21, thereby using the negative pressure suction force to remove accumulated fluid from the patient's body. The suction tube 3 and the inlet check valve 23 draw liquid into the suction cylinder 21. When the pressure on the gun handle 11 is released, the piston 24 moves back to the suction cylinder 21 under the return force of the return spring 25, so that the pressure in the suction cylinder 21 gradually increases. At this time, the accumulated liquid in the suction cylinder 21 is transported downward to the storage section 4 through the drain check valve 22 below. This process is repeated. By repeatedly pressing the gun handle 11, the piston 24 can be driven to move back and forth to continuously draw and drain liquid.

[0030] The negative pressure sedimentation chamber can be used to aspirate liquids and soft solid tissues within them. Furthermore, by adjusting and increasing the negative pressure suction, the viscosity of the solid tissues that can be aspirated can also be increased. This allows the negative pressure suction gun of this application to not only be used for aspirating fluid accumulation and sampling solid tissues in the field of endometrium gynecology, but also for aspirating solid and liquid components such as tumor biopsies and brain tissues in confined and narrow spaces.

[0031] Preferably, the drain check valve 22 and the inlet check valve 23 can be flexible check valves such as duckbill check valves or rubber check valves, so that solid tissues can pass through the check valves during liquid aspiration.

[0032] Example 3 Please see Figures 1-4 , Figures 7-14 As shown, the difference between this embodiment and the above embodiment is that the limiting adjustment part 5 includes an abutting limiting member, which is installed on the gun body 1 and located at the rear end of the piston rod 26's movement trajectory, so that the abutting limiting member can abut and limit the piston rod 26 when the piston rod 26 moves backward, and the abutting limiting member can be adjusted to move horizontally on the gun body 1 to adjust the distance between the abutting limiting member and the piston rod 26, thereby adjusting the movement stroke of the piston rod 26; the abutting limiting member includes a limiting bolt 51, which is threadedly rotatably installed at the end of the gun body 1, and a rotating head is fixedly installed on the outer end of the limiting bolt 51.

[0033] The inner end of the limiting bolt 51 can abut against the end of the piston rod 26 when the piston rod 26 moves backward, thereby limiting the movement of the piston rod 26 and the piston 24. In the initial stage of aspiration, most of the main body of the limiting bolt 51 is located outside the gun body 1. At this time, the movement of the piston rod 26 and the piston 24 is large, and the amount of liquid aspirated in a single stroke is large, which can more quickly aspirate and drain the accumulated liquid. As the accumulated liquid in the patient's body gradually decreases, the limiting bolt 51 can be rotated to move closer to the piston rod 26, thereby reducing the movement of the piston rod 26 and the piston 24, and thus reducing the amount of liquid aspirated in a single stroke and the magnitude of the negative pressure suction, preventing excessive suction from causing tissue damage or discomfort to the patient.

[0034] Furthermore, the limit adjustment part 5 also includes a limit strip 52 and a support shaft 53. The limit strip 52 is rotatably mounted on the gun handle 11 via the support shaft 53. The bottom surface of the limit strip 52 is provided with a plurality of ratchet teeth 54 arranged in an arc shape. The gun body 1 is provided with a through hole for the limit strip 52 to pass through. The bottom surface of the through hole is provided with a limit tooth 59 that can engage with the ratchet teeth 54. The limit strip 52 can be adjusted between a limited state and a non-limited state. When the limit strip 52 is in the limited state, the limiting end of the limit strip 52 is elastically pressed down to make the ratchet teeth 54 and the limit tooth 59 engage. When the limit strip 52 is in the non-limited state, the limiting end of the limit strip 52 is lifted up to make the ratchet teeth 54 and the limit tooth 59 separate.

[0035] During normal fluid aspiration and drainage, the limiting strip 52 is in a non-limited state, allowing the gun handle 11 to stably aspirate and drain fluid. When the accumulated fluid is about to be drained and slow, precise drainage is needed, or when precise drainage of the lesion is required, the limiting strip 52 is adjusted to the limiting state. At this time, the limiting end of the limiting strip 52 (the end with the ratchet 54) is elastically pressed down, so that the ratchet 54 and the limiting tooth 59 engage. When the gun handle 11 gradually closes and drives the negative pressure suction unit 2 to aspirate fluid, the limiting strip 52 moves towards the handle of the gun body 1. At this time, the limiting end of the limiting strip 52 is lifted upward by the push of the guide slope of the ratchet 54 and the limiting tooth 59. After the ratchet 54 passes the limiting tooth 59... The limiting strip 52 is elastically pressed down and reset, so that the ratchet 54 and the limiting tooth 59 flexibly limit the gun handle 11 through the limiting inclined surface, so that medical staff can perceive the displacement and closing distance of the gun handle 11, and prevent the gun handle 11 from closing too quickly, which would cause excessive instantaneous suction and cause tissue damage or discomfort to the patient. When the gun handle 11 is released, the ratchet 54 and the limiting tooth 59 can lock the gun handle 11, preventing the gun handle 11 from resetting and opening, so that the negative pressure suction unit 2 only performs the suction process and no longer discharges liquid. Then, by continuously and slowly closing the gun handle 11, the negative pressure suction unit 2 is driven to continuously and slowly suction liquid, so as to accurately control and measure the suction volume, thereby improving the suction effect.

[0036] Specifically, an elastic telescopic component is installed on the top surface of the limiting end of the limiting strip 52. The elastic telescopic component can drive the limiting end of the limiting strip 52 to rotate downward through elastic force, so that the limiting strip 52 enters the limiting state. A buckle 56 is rotatably installed on the gun handle 11. A slot 55 is provided on the top surface of the outer end of the limiting strip 52, which can engage with the buckle 56. When the buckle 56 is engaged in the slot 55, the buckle 56 can overcome the elastic driving force of the elastic telescopic component to keep the limiting end of the limiting strip 52 in the raised state, thereby keeping the limiting strip 52 in the non-limited state. The elastic telescopic component includes a limiting post 57, which is fixedly installed on the top surface of the limiting end of the limiting strip 52. A pressure spring 58 is fitted on the limiting post 57, and the bottom end of the pressure spring 58 abuts against the top surface of the limiting strip 52.

[0037] When the limiting strip 52 needs to be in a non-limited state, press the outer end of the limiting strip 52 downward and engage the buckle 56 in the groove 55 on the top surface of the outer end of the limiting strip 52 to limit and fix the limiting strip 52. At this time, the limiting end of the limiting strip 52 is lifted upward, so that the ratchet 54 and the limiting tooth 59 are separated and no longer mesh with each other to limit. When the limiting strip 52 needs to be adjusted to the limiting state, rotate the buckle 56 out of the groove 55. At this time, the limiting end of the limiting strip 52 rotates downward under the drive of the pressure spring 58 until the bottom surface of the limiting end of the limiting strip 52 abuts against the limiting tooth 59. At this time, the ratchet 54 and the limiting tooth 59 mesh and engage, so that the limiting strip 52, ratchet 54 and limiting tooth 59 cooperate to limit the gun handle 11.

[0038] Example 4 Please see Figure 1 , Figure 2 , Figures 4-7 As shown, the difference between this embodiment and the above embodiment is that the liquid storage part 4 includes a liquid storage bottle 41 and a connector 44. The connector 44 is fixedly installed on the liquid outlet of the negative pressure suction part 2. The liquid storage bottle 41 is detachably and sealedly installed on the connector 44. A filter bag 47 is provided inside the liquid storage bottle 41. The bag opening of the filter bag 47 overlaps the protrusion inside the bottle opening of the liquid storage bottle 41. When the liquid storage bottle 41 is installed on the connector 44, the protrusion can cooperate with the connector 44 to abut and clamp the bag opening of the filter bag 47. The negative pressure suction unit 2 can transport the suctioned liquid to the storage bottle 41 through the liquid outlet. When the liquid is transported to the storage bottle 41, it first enters the filter bag 47, where the filter bag 47 performs solid-liquid separation. This allows solid tissues or blood clots mixed in the liquid to be intercepted and retained in the filter bag 47, while the liquid is stored in the storage bottle 41 through the filter bag 47.

[0039] Furthermore, multiple connecting posts 45 are fixedly installed on the outer ring of the connector 44, and multiple connecting grooves 46 corresponding one-to-one with the connecting posts 45 are provided inside the bottle mouth of the liquid storage bottle 41. The connecting grooves 46 can slide and engage with the connecting posts 45. The connecting groove 46 includes an upper opening, a middle inclined guide, and a final horizontal limiting part. When installing the liquid storage bottle 41, the opening of the connecting groove 46 is aligned vertically with the connecting post 45, and then the opening of the liquid storage bottle 41 is sealed and inserted into the outer ring of the connector 44. Rotate the storage bottle 41, and then rotate it so that the connecting post 45 slides and engages with the horizontal limiting part through the inclined guide part. The storage bottle 41 can be connected and installed by the limiting engagement of the connecting post 45 and the connecting groove 46. Correspondingly, when it is necessary to disassemble and remove the storage bottle 41, rotate the storage bottle 41 in the opposite direction so that the connecting post 45 gradually slides out of the connecting groove 46. This makes the installation and disassembly of the storage bottle 41 more convenient and quick, so as to facilitate the replacement of the storage bottle 41 and the sampling and testing of solid samples in the filter bag 47.

[0040] Furthermore, the bottom of the storage bottle 41 is also provided with a drain port, and the bottom of the drain port is connected to a drain valve 42. The outlet end of the drain valve 42 is connected to a drain conduit 43. The storage bottle 41 with or without a drain port can be selected according to the needs of the operation. For example, when the patient has a lot of fluid accumulation and a single or a small number of storage bottles 41 cannot meet the storage needs of the fluid accumulation, the storage bottle 41 with a drain port can be selected. When the fluid is aspirated and drained, one end of the drain conduit 43 is connected to an external fluid collection container and the drain valve 42 is opened so that the fluid in the storage bottle 41 can be continuously discharged into the external fluid collection container through the drain conduit 43.

[0041] Furthermore, the liquid storage bottle 41 and the filter bag 47 are made of transparent material to facilitate medical staff to observe the accumulated liquid in the liquid storage bottle 41 and the solid tissue intercepted and filtered in the filter bag 47 during operation, thereby facilitating timely disassembly and replacement of the new liquid storage bottle 41 and timely delivery of the solid tissue in the filter bag 47 for testing.

[0042] Example 5 Please see Figure 1 , Figure 4 , Figure 15 As shown, the difference between this embodiment and the above embodiment is that the suction tube 3 is inserted into the inlet of the negative pressure suction part 2, and the front end of the suction tube 3 is provided with an oblique suction port 31. The rear end of the suction tube 3 is fixedly installed with a knob 32. The suction tube 3 can be driven to rotate relative to the negative pressure suction part 2 by the knob 32 to adjust the direction of the oblique suction port 31. The suction tube 3 is a flexible catheter, allowing it to extend along the medical sheath into the patient's body for aspiration and drainage of accumulated fluid. An angled suction port 31 at the front end of the suction tube 3 allows it to more easily approach or parallel to tissue surfaces (such as the uterine lining or peritoneum), facilitating more effective aspiration of accumulated fluid and improving drainage efficiency. Furthermore, by rotating and adjusting the direction of the angled suction port 31, 360-degree rotational aspiration can be achieved, avoiding blind spots and increasing the aspiration range and effectiveness of the angled suction port 31.

[0043] Example 6 This embodiment discloses a manual negative pressure suction method, the specific steps of which are as follows: Place the suction end of the suction tube 3 in the suction position, and press the gun handle 11 repeatedly with your hand to make the gun handle 11 open and close repeatedly. During the reciprocating opening and closing process, the gun handle 11 drives the negative pressure suction unit 2 to reciprocate between the liquid suction state and the liquid discharge state. When the negative pressure suction unit 2 enters the liquid suction state, it sucks up the accumulated liquid through the liquid suction pipe 3. When the negative pressure suction unit 2 enters the liquid discharge state, it transports the sucked accumulated liquid into the liquid storage unit 4. The liquid storage unit 4 uses an internal filtration unit to intercept and filter solid impurities in the liquid to achieve solid-liquid separation. The limit adjustment part 5 adjusts the limit of the gun handle 11, gradually reducing the opening and closing stroke of the gun handle 11, thereby gradually reducing the amount of liquid absorbed by the negative pressure suction part 2 until the liquid absorption process is completed.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

Claims

1. A negative pressure suction gun, comprising a gun body and a handle mounted on the gun body, characterized in that: The gun body is also equipped with a negative pressure suction unit, a suction tube, a liquid storage unit, and a limit adjustment unit. The negative pressure suction unit is also provided with a negative pressure sedimentation chamber. The gun handle can drive the negative pressure suction unit to reciprocate between the suction state and the discharge state during the reciprocating opening and closing process. When the negative pressure suction unit enters the suction state, it can suck the accumulated liquid into the negative pressure sedimentation chamber through the suction tube. When the negative pressure suction unit enters the discharge state, it can also transport the accumulated liquid sucked into the negative pressure sedimentation chamber to the liquid storage unit. The liquid storage section is equipped with a filter section, which can intercept and filter solid impurities in the liquid to achieve solid-liquid separation. The limiting adjustment part can limit the gun handle to increase or decrease the opening and closing stroke of the gun handle. When the opening and closing stroke of the gun handle increases, the liquid absorption of the negative pressure suction part increases simultaneously. When the opening and closing stroke of the gun handle decreases, the liquid absorption of the negative pressure suction part decreases simultaneously.

2. The negative pressure suction gun according to claim 1, characterized in that: The negative pressure suction unit includes a suction pumping unit, which is connected to the gun handle for transmission, so that when the gun handle reciprocates, it can drive the suction pumping unit to reciprocate to perform negative pressure suction and squeezing pumping in the negative pressure sedimentation chamber. When the negative pressure sedimentation chamber is suctioned under negative pressure, it can unidirectionally suck liquid through the suction pipe. When the negative pressure sedimentation chamber is squeezed and pumped, it can unidirectionally discharge the sucked-in liquid to the storage unit.

3. A negative pressure suction gun according to claim 2, characterized in that: The negative pressure sedimentation chamber includes a suction cylinder, the inlet of which is connected to a suction pipe and a one-way valve is installed inside the inlet, and the outlet of which is connected to a storage section and a one-way valve is installed inside the outlet.

4. A negative pressure suction gun according to claim 2, characterized in that: The suction pumping unit includes a pressure chamber and a drive rod. The pressure chamber is located inside the gun body and communicates with the negative pressure sedimentation chamber. A piston is slidably installed inside the pressure chamber. A piston rod is fixedly installed at one end of the piston. The drive rod is rotatably installed inside the gun body, with one end connected to the piston rod and the other end connected to the top of the gun handle. The gun handle is rotatably installed on the gun body via a pin. When the gun handle rotates around the pin, it can drive the piston to slide backward in the pressure chamber via the drive rod. The rear end of the piston is also abutted against an elastic reset member. When the gun handle is released, the elastic reset member can drive the piston to move forward and reset in the pressure chamber.

5. A negative pressure suction gun according to claim 4, characterized in that: The limiting adjustment part includes an abutting limiting member, which is installed on the gun body and located at the rear end of the piston rod's movement trajectory, so that the abutting limiting member can abut and limit the piston rod when the piston rod moves backward, and the abutting limiting member can be adjusted horizontally on the gun body to adjust the distance between the abutting limiting member and the piston rod, thereby adjusting the piston rod's movement stroke.

6. A negative pressure suction gun according to any one of claims 1-5, characterized in that: The limiting adjustment part also includes a limiting strip and a support shaft. The limiting strip is rotatably mounted on the gun handle via the support shaft. The bottom surface of the limiting strip is provided with multiple ratchet teeth arranged in an arc shape. The gun body is provided with a through hole for the limiting strip to pass through. The bottom surface of the through hole is provided with limiting teeth that can engage with the ratchet teeth. The limiting strip can be adjusted between a limited state and a non-limited state. When the limiting strip is in the limited state, the limiting end of the limiting strip is elastically pressed down to make the ratchet teeth and the limiting teeth engage. When the limiting strip is in the non-limited state, the limiting end of the limiting strip is lifted up to make the ratchet teeth and the limiting teeth separate.

7. A negative pressure suction gun according to claim 6, characterized in that: The top surface of the limiting end of the limiting strip is abutted and installed with an elastic telescopic member. The elastic telescopic member can drive the limiting end of the limiting strip to rotate downward through elastic force, so that the limiting strip enters the limiting state. A buckle is rotatably installed on the gun handle. The top surface of the outer end of the limiting strip is provided with a slot that can engage with the buckle. When the buckle is engaged in the slot, the buckle can overcome the elastic driving force of the elastic telescopic member and keep the limiting end of the limiting strip in the raised state, thereby keeping the limiting strip in the non-limited state.

8. A negative pressure suction gun according to any one of claims 1-5, characterized in that: The liquid storage unit includes a liquid storage bottle and a connector. The connector is fixedly installed on the liquid outlet of the negative pressure suction unit, and the liquid storage bottle is detachably and sealedly installed on the connector. The liquid storage bottle is equipped with a filter bag inside. The opening of the filter bag overlaps with a protrusion inside the opening of the liquid storage bottle. When the liquid storage bottle is installed on the connector, the protrusion can cooperate with the connector to clamp the opening of the filter bag.

9. A negative pressure suction gun according to claim 1, characterized in that: The suction tube is inserted into the inlet of the negative pressure suction unit, and the front end of the suction tube is provided with an angled suction port. A knob is fixedly installed on the rear end of the suction tube. The knob can drive the suction tube to rotate relative to the negative pressure suction unit to adjust the direction of the angled suction port.

10. A manual negative pressure suction method, applied to the negative pressure suction gun as described in any one of claims 1-9, characterized in that, The specific steps are as follows: Place the suction end of the suction tube in the suction position, and press the handle back and forth with your hand to open and close the handle. During the reciprocating opening and closing process, the gun handle drives the negative pressure suction unit to reciprocate between the liquid suction state and the liquid discharge state. When the negative pressure suction unit enters the liquid suction state, it sucks up the accumulated liquid through the suction tube. When the negative pressure suction unit enters the liquid discharge state, it transports the sucked accumulated liquid to the liquid storage unit. The liquid storage section uses an internal filtration section to intercept and filter solid impurities in the liquid, thereby achieving solid-liquid separation. The gun handle is adjusted by the limit adjustment part, which gradually reduces the opening and closing stroke of the gun handle, thereby gradually reducing the amount of liquid absorbed by the negative pressure suction part until the liquid absorption process is completed.

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