Medical water jet pressurization structure, medical water jet assembly, and medical water jet

Abstract

This application provides a medical water jet pressurization structure, a medical water jet assembly, and a medical water jet. The aforementioned medical water jet pressurization structure includes a high-pressure container. The high-pressure container has a pressurization chamber, an air inlet, and a connecting hole. Both the air inlet and the connecting hole are connected to the pressurization chamber. The pressurization chamber is used to house a liquid bladder bag and a liquid bladder tube. The air inlet is used to communicate with the high-pressure gas tank. The connecting hole is used to pass through a high-pressure tube, and the outer wall of the high-pressure tube tightly abuts against the wall of the connecting hole. The end of the high-pressure tube located in the pressurization chamber is used to connect with the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure tube is connected to the liquid bladder tube. The aforementioned medical water jet pressurization structure can achieve effective pressurization and can reduce sterilization complexity and consumable costs.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical water jet pressurization structure, a medical water jet assembly, and a medical water jet. Background Technology

[0002] A medical water jet is a medical device that uses a high-pressure liquid jet to cut tissue and clean wounds, such as... Figures 10 to 11 As shown, medical water jets are widely used in clinical settings such as surgery, orthopedics, and burn units. Current high-pressure driving methods for medical water jets mainly involve direct pressurization by a high-pressure plunger pump or reciprocating pressurization by a dual-pump system, as illustrated in utility model patent applications CN201821906370.1 and CN202520877359.0. However, both of these applications suffer from the following core technical deficiencies: 1. The liquid comes into direct contact with the pressure pump, making sterilization complex; 2. The liquid is usually physiological saline, which contains 0.9% sodium chloride. This affects the sealing effect of the pressure pump and needs to be discarded after a few uses, resulting in high consumable costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a medical water jet pressurization structure, medical water jet assembly, and medical water jet that can achieve effective pressurization, reduce sterilization complexity, and reduce consumable costs.

[0004] The objective of this invention is achieved through the following technical solution: A medical water jet pressurization structure is provided, wherein the medical water jet is used to pressurize a liquid sac, the liquid sac comprising a liquid sac bag and a liquid sac tube, the liquid sac tube communicating with the liquid sac bag, and the medical water jet pressurization structure comprising: A high-pressure tank is provided with a pressurization chamber, an air inlet, and a connecting hole. The air inlet and the connecting hole are both connected to the pressurization chamber. The pressurization chamber is used to accommodate the liquid bladder bag and the liquid bladder tube. The air inlet is used to connect to a high-pressure gas tank. The connecting hole is used to pass through a high-pressure tube, and the outer wall of the high-pressure tube is tightly abutted against the wall of the connecting hole. The end of the high-pressure tube located in the pressurization chamber is used to connect to the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure tube is connected to the liquid bladder tube.

[0005] In one embodiment, the high-pressure pipe is screwed to the connecting hole, and a first pipe sealing ring is fitted onto the wall of the connecting hole. The first pipe sealing ring is used to clamp between the outer wall of the high-pressure pipe and the wall of the connecting hole.

[0006] In one embodiment, the high-pressure tube is screwed to the liquid bladder tube, and a second pipe sealing ring is fitted on the outer wall of the high-pressure tube. The second pipe sealing ring is used to clamp between the outer wall of the high-pressure tube and the inner wall of the liquid bladder tube.

[0007] In one embodiment, an integrated high-pressure control mechanism is provided between the high-pressure gas tank and the air inlet. The integrated high-pressure control mechanism is connected to both the high-pressure gas tank and the air inlet, and is used to regulate the gas pressure of the high-pressure gas tank.

[0008] In one embodiment, the medical water jet pressurization structure further includes a safety redundancy protection mechanism. The safety redundancy protection mechanism includes a main unit, a first pressure sensor, a second pressure sensor, a spring-loaded micro-opening closed safety valve, and an emergency button, all electrically connected to the main unit. The first pressure sensor is located at the high-pressure tank, the second pressure sensor is located at the high-pressure pipe, and the spring-loaded micro-opening closed safety valve is connected to the high-pressure tank.

[0009] In one embodiment, the high-pressure tank includes a cover and a shell, the cover being detachably and tightly fitted onto the shell to form the pressurization chamber, and the air inlet and the connecting hole being independently provided on the cover or the shell.

[0010] In one embodiment, at least two first stop members are provided on the inner wall of the cover at intervals; At least two second stop members are provided on the outer wall of the housing at intervals, and at least two first stop members and at least two second stop members are provided in a one-to-one correspondence; When the cover is tightly fitted onto the housing, the side of the first stop member near the cover member closely abuts against the side of the second stop member near the housing member.

[0011] In one embodiment, the inner wall of the cover is provided with a tank sealing ring, which surrounds the peripheral wall of the shell; When the cover is tightly fitted onto the shell, the tank sealing ring is at least partially sandwiched between the inner wall of the cover and the outer wall of the shell.

[0012] In one embodiment, the high-pressure tank is a medical-grade 316L stainless steel high-pressure tank.

[0013] In one embodiment, the volume of the high-pressure tank is 3L to 4L.

[0014] In one embodiment, the wall thickness of the high-pressure pipe is 25mm to 35mm.

[0015] In one embodiment, the burst pressure of the high-pressure pipe is ≥81MPa.

[0016] In one embodiment, the liquid bladder is a medical-grade peroxide-cured EPDM liquid bladder.

[0017] In one embodiment, the wall thickness of the liquid bladder is 1.8 mm to 2.5 mm.

[0018] In one embodiment, the volume of the liquid bladder is 0.5L to 1L smaller than the volume of the high-pressure tube.

[0019] In one embodiment, the bladder tube is a medical-grade 316L stainless steel bladder tube.

[0020] In one embodiment, the end of the bladder tube is connected to the opening of the bladder bag via a flange.

[0021] In one embodiment, the liquid bag contains physiological saline.

[0022] In one embodiment, the output gas pressure range of the high-pressure gas tank is 0~40MPa.

[0023] A medical water jet assembly includes a blade, a high-pressure tube, and a return tube. The blade is connected to the distal end of the high-pressure tube, and the blade at least partially protrudes from the distal end of the return tube. The opening of the blade is disposed away from the return tube. The distal end of the return pipe is connected to a backflow bend, the proximal end of the backflow bend is connected to the distal end of the return pipe, and the backflow bend is spaced apart from the cutter head. The distal end of the backflow bend is bent toward the cutter head so that the opening of the distal end of the backflow bend is opposite to the opening of the cutter head to form an operating window.

[0024] In one embodiment, the return pipe is provided with a spacer plate that extends along the length of the return pipe. The spacer plate is connected to the inner wall of the return pipe to form a first pipe and a second pipe. The distal end of the high-pressure pipe is accommodated in the first pipe and connected to the cutter head. The second pipe is connected to the proximal end of the avoidance bend pipe.

[0025] In one embodiment, the end of the second pipe away from the bypass bend is used to communicate with the negative pressure collection chamber.

[0026] In one embodiment, the spacer is a medical-grade 316L stainless steel plate.

[0027] In one embodiment, the spacer plate and the return pipe are integrally formed.

[0028] In one embodiment, the return pipe and the avoidance bend pipe are integrally formed.

[0029] In one embodiment, the blade is a medical-grade zirconia ceramic blade or a medical-grade 316L stainless steel blade.

[0030] In one embodiment, the reflux tube is a medical-grade 316L stainless steel tube.

[0031] In one embodiment, the bypass bend is a medical-grade 316L stainless steel pipe.

[0032] In one embodiment, the distance between the opening of the cutter head and the opening at the far end of the back bend is 8 mm.

[0033] In one embodiment, a handle is fitted onto the reflux tube, both ends of the reflux tube protrude beyond the handle, and the proximal end of the high-pressure tube protrudes beyond the handle.

[0034] A medical water jet includes a high-pressure gas cylinder, a liquid bladder, a medical water jet pressurization structure as described in any of the above embodiments, and a medical water jet assembly as described in any of the above embodiments. The liquid bladder includes a liquid bladder bag and a liquid bladder tube, the liquid bladder tube is connected to the liquid bladder bag, and the liquid bladder bag and the liquid bladder tube are housed in the pressurization chamber. The high-pressure gas tank is connected to the air inlet, and the connecting hole is used to pass through the high-pressure pipe. The outer wall of the high-pressure pipe is tightly abutted against the hole wall of the connecting hole. The end of the high-pressure pipe located in the pressurization chamber is used to connect to the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure pipe is connected to the liquid bladder tube.

[0035] Compared with the prior art, the present invention has at least the following advantages: The medical water jet pressurization structure of this invention provides a pressurization chamber within the high-pressure vessel. This chamber houses a liquid bladder bag and a liquid bladder tube, allowing the liquid bladder bag and tube to be independently placed within the pressurization chamber. At this point, the pressurization chamber has no direct contact with the inside of the liquid bladder bag or tube. The air inlet of the high-pressure vessel connects to a high-pressure gas tank, enabling the input of high-pressure gas into the pressurization chamber. A connecting hole is used to insert a high-pressure tube, with the outer wall of the high-pressure tube tightly abutting against the wall of the connecting hole. This allows the high-pressure tube to extend into the high-pressure vessel and seal the connecting hole, achieving both the insertion of the high-pressure tube and the sealing of the pressurization chamber within the high-pressure vessel. The sealing mechanism further allows the end of the high-pressure tube located in the pressurization chamber to connect with the end of the liquid bladder tube away from the liquid bladder bag, thus enabling communication between the high-pressure tube and the liquid bladder tube. This achieves internal communication between the high-pressure tube and the liquid bladder tube, and ensures that the interior of the high-pressure tube does not directly contact the pressurization chamber. Even when high-pressure gas is input from the high-pressure gas tank into the pressurization chamber, the high-pressure gas pressurizes and compresses the liquid bladder bag, causing the liquid in the liquid bladder bag to be output through the liquid bladder tube to the high-pressure tube. The liquid inside the liquid bladder bag does not come into contact with the high-pressure tank during the transmission process. This achieves pressurized output of the liquid inside the liquid bladder bag, reducing the complexity of sterilization in the high-pressure tank and lowering consumable costs. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a medical water knife according to an embodiment of the present invention; Figure 2 for Figure 1 A partial view of the medical water jet shown; Figure 3 for Figure 1 A partial cross-sectional view of the medical water jet shown; Figure 4 for Figure 2 A partial cross-sectional view of the medical water jet shown; Figure 5 for Figure 2 Another partial cross-sectional view of the medical water jet shown; Figure 6 for Figure 1 Another partial view of the medical water jet shown; Figure 7 for Figure 6 A partial cross-sectional view of the medical water jet shown; Figure 8 for Figure 7 A magnified view of part A of the medical water jet shown; Figure 9 for Figure 6 Another partial cross-sectional view of the medical water jet shown; Figure 10 This is a schematic diagram of a conventional medical water jet. Figure 11 This is another structural diagram of a conventional medical water jet. Figure 12 This is another structural diagram of a conventional medical water jet. Figure 13 This is another structural diagram of a conventional medical water jet. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the embodiments and examples. It should be understood that these embodiments and examples are for illustrative purposes only and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to enable a more thorough and comprehensive understanding of the disclosure of the present application. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. Furthermore, numerous specific details are set forth in the following description to provide a fuller understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] In this invention, the technical features described in an open-ended manner include both closed-ended technical solutions composed of the listed features and open-ended technical solutions that include the listed features.

[0041] In this invention, numerical intervals (i.e., numerical ranges) are involved. Unless otherwise specified, the selected numerical distributions within the aforementioned numerical intervals are considered continuous, and include the two endpoints (i.e., the minimum and maximum values) of the numerical range, as well as every value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints. In this document, this is equivalent to directly listing every integer. For example, if t is an integer selected from 1 to 10, it means that t is any integer selected from the group of integers consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Furthermore, when multiple ranges are provided to describe features or characteristics, these ranges can be merged. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0042] Unless otherwise specified, the temperature parameters in this invention can be either constant temperature treatment or vary within a certain temperature range. It should be understood that constant temperature treatment allows temperature fluctuations within the precision range controlled by the instrument. Fluctuations are permitted within ranges such as ±5℃, ±4℃, ±3℃, ±2℃, and ±1℃.

[0043] Please refer to the following: Figure 1 and Figure 3 This application provides a medical water jet pressurization structure 10 for pressurizing a liquid bladder 20. The liquid bladder 20 includes a liquid bladder bag 210 and a liquid bladder tube 220, with the liquid bladder tube 220 communicating with the liquid bladder bag 210. The aforementioned medical water jet pressurization structure includes a high-pressure container. The high-pressure container is provided with a pressurization chamber, an air inlet, and a connecting hole. Both the air inlet and the connecting hole are connected to the pressurization chamber. The pressurization chamber is used to accommodate the liquid bladder bag and the liquid bladder tube. The air inlet is used to communicate with the high-pressure gas container. The connecting hole is used to pass through a high-pressure tube, and the outer wall of the high-pressure tube is tightly abutted against the wall of the connecting hole. The end of the high-pressure tube located in the pressurization chamber is used to connect with the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure tube is connected to the liquid bladder tube.

[0044] To better understand the pressurization structure of the medical water jet in this application, the following further explanation is provided: Please refer to the following: Figures 2 to 5One embodiment of the medical water jet pressurization structure 10 includes a high-pressure container 100. The high-pressure container 100 is provided with a pressurization chamber 101, an air inlet 102, and a connecting hole 103. Both the air inlet 102 and the connecting hole 103 are connected to the pressurization chamber 101. The pressurization chamber 101 is used to accommodate the liquid bag 210 and the liquid bag tube 220. The air inlet 102 is used to connect to the high-pressure gas tank 30. The connecting hole 103 is used to pass through the high-pressure tube 420, and the outer wall of the high-pressure tube 420 is tightly abutted against the wall of the connecting hole 103. The end of the high-pressure tube 420 located in the pressurization chamber 101 is used to connect to the end of the liquid bag tube 220 away from the liquid bag 210, and the high-pressure tube 420 is connected to the liquid bag tube 220.

[0045] The aforementioned medical water jet pressurization structure 10 causes the high-pressure tank 100 to have a pressurization chamber 101, which is used to accommodate the liquid bag 210 and the liquid tube 220. The liquid bag 210 and the liquid tube 220 are placed independently within the pressurization chamber 101. At this time, the pressurization chamber 101 has no direct contact with the inside of the liquid bag 210 and the liquid tube 220. The air inlet 102 of the high-pressure tank 100 is used to connect with the high-pressure gas tank 30, realizing the input of high-pressure gas into the pressurization chamber 101. The connecting hole 103 is used to insert the high-pressure tube 420. The outer wall of the high-pressure tube 420 tightly abuts against the wall of the connecting hole 103, allowing the high-pressure tube 420 to extend into the high-pressure tank 100 and sealing the connecting hole 103. This achieves the insertion of the high-pressure tube 420 into the high-pressure tank 100, thus enabling the high-pressure tank 100 to... The sealing of the pressurization chamber 101 further enables the end of the high-pressure pipe 420 located in the pressurization chamber 101 to connect with the end of the liquid bladder tube 220 away from the liquid bladder bag 210, so that the high-pressure pipe 420 and the liquid bladder tube 220 are connected, realizing the communication between the high-pressure pipe 420 and the interior of the liquid bladder tube 220, and realizing that the interior of the high-pressure pipe 420 has no direct contact with the pressurization chamber 101. Even when the high-pressure gas tank 30 inputs high-pressure gas into the pressurization chamber 101, the high-pressure gas pressurizes and compresses the liquid bladder bag 210, causing the liquid in the liquid bladder bag 210 to be output to the high-pressure pipe 420 through the liquid bladder tube 220. The liquid in the liquid bladder bag 210 has no contact with the high-pressure tank 100 during the transmission process. On the basis of pressurizing and outputting the liquid in the liquid bladder bag 210, the sterilization complexity of the high-pressure tank 100 is reduced, and the consumable cost is reduced.

[0046] It is also understandable that the high-pressure driving method for medical water jets is either direct pressurization via a high-pressure plunger pump or reciprocating pressurization via a dual-pump system. Single-pump reciprocating pressurization results in noticeable water pressure pulses, while dual-pump reciprocating pressurization, although effectively reducing water pressure pulses, often requires the addition of active pulse elimination equipment to achieve the "zero-pulse" jet required for delicate surgeries such as neurosurgery and ophthalmology. This increases the structural complexity of the medical water jet, and please refer to this application for further details. Figures 2 to 5This allows the high-pressure gas tank 30 to input high-pressure gas into the pressurization chamber 101 to pressurize the liquid bag 210, thereby causing the liquid in the liquid bag 210 to be pressurized and output to the high-pressure pipe 420 through the liquid bag tube 220. The process of the high-pressure gas tank 30 inputting high-pressure gas into the pressurization chamber 101 to pressurize the liquid bag 210 can achieve a stable constant flow of high-pressure gas into the pressurization chamber 101, truly realizing the "zero pulse" jet of the medical water jet.

[0047] In one embodiment, the high-pressure gas cylinder is a high-pressure nitrogen cylinder or a high-pressure helium cylinder. Further, the high-pressure gas cylinder is a liquid nitrogen cylinder. Further, the inlets of the high-pressure gas cylinder and the high-pressure furnace are connected via a quick-connect coupling pipe, which is a conventional gas delivery coupling pipe used to connect the nitrogen cylinder and the nitrogen furnace. The connection structure between the quick-connect coupling pipe and the inlets of the high-pressure gas cylinder and the high-pressure furnace will not be described in detail here.

[0048] Please refer to the following: Figures 3 to 5 In one embodiment, the high-pressure pipe 420 is screwed to the connecting hole 103, and a first pipe sealing ring 160 is sleeved on the hole wall of the connecting hole 103. The first pipe sealing ring 160 is used to clamp between the outer wall of the high-pressure pipe 420 and the hole wall of the connecting hole 103. Its connection method is similar to the connection method of the lifting ring quick connector connecting pipe.

[0049] Please refer to the following: Figures 3 to 5 In one embodiment, the high-pressure pipe 420 is screwed to the liquid bladder tube 220, and a second pipe sealing ring 170 is fitted onto the outer wall of the high-pressure pipe 420. The second pipe sealing ring 170 is used to clamp between the outer wall of the high-pressure pipe 420 and the inner wall of the liquid bladder tube 220. Further, a rigid connecting part 470 is connected to the end of the high-pressure pipe 420 near the high-pressure tank 100. The outer wall of the rigid connecting part 470 tightly abuts against the wall of the connecting hole 103. The rigid connecting part 470 is used to connect to the end of the liquid bladder tube 220 away from the liquid bladder bag 210. Further, the rigid connecting part 470 is screwed to the liquid bladder tube 220. Further, the rigid connecting part 470 is screwed to the connecting hole 103. Further, the rigid connecting part 470 is a stainless steel connecting part, effectively ensuring the sealed connection between the high-pressure tank 100 and the liquid bladder tube 220, and achieving the sealing of the high-pressure pipe 420 to the connecting hole 103 of the pressurization chamber 101.

[0050] Please refer to the following: Figures 3 to 5In one embodiment, an integrated high-pressure control mechanism (not shown) is provided between the high-pressure gas tank 30 and the air inlet 102. The integrated high-pressure control mechanism is connected to both the high-pressure gas tank 30 and the air inlet 102, and is used to regulate the gas pressure of the high-pressure tank 100. Further, the high-pressure control mechanism includes a high-pressure electric shut-off valve, a high-pressure one-way valve, a medical sterile gas filter, and a manual pressure relief valve connected in sequence. The high-pressure electric shut-off valve is connected to the high-pressure gas tank 30, and the pressure relief valve is connected to the high-pressure tank 100. It is understood that the high-pressure electric shut-off valve, high-pressure one-way valve, medical sterile gas filter, and manual pressure relief valve are conventional assembly structures for regulating the nitrogen input pressure of the nitrogen tank and nitrogen furnace; therefore, they will not be described in detail here.

[0051] Please refer to the following: Figures 3 to 5 In one embodiment, the medical water jet pressurization structure 10 also includes a safety redundancy protection mechanism (not shown). This mechanism includes a main unit, a first pressure sensor, a second pressure sensor, a spring-loaded closed safety valve, and an emergency stop button, all electrically connected to the main unit. The first pressure sensor is located at the high-pressure tank 100, the second pressure sensor is located at the high-pressure pipe 420, and the spring-loaded closed safety valve is connected to the high-pressure tank 100. It can be understood that the main unit is a conventional medical water jet unit used to control the jet parameters, while the first pressure sensor, second pressure sensor, spring-loaded closed safety valve, and emergency stop button are standard assembly structures for nitrogen input control and emergency shutdown of conventional nitrogen tanks and nitrogen furnaces; therefore, they will not be described in detail here.

[0052] Please refer to the following: Figures 2 to 4 In one embodiment, the high-pressure canister 100 includes a cover 110 and a shell 120. The cover 110 is detachably and tightly fitted onto the shell 120 to form a pressurization chamber 101. An air inlet 102 and a connecting hole 103 are independently provided on the cover 110 or the shell 120. It is understood that the detachable and tight connection between the cover 110 and the shell 120 facilitates the effective insertion and removal of the liquid bladder bag 210 and the liquid bladder tube 220, enabling convenient insertion and removal of the liquid bladder bag 210 and the liquid bladder tube 220 of the medical water jet. Since the high-pressure canister 100 does not contact the liquid bladder tube 220 or the liquid bladder bag 210, the cover 110 and the shell 120 can be opened and simply sterilized before and after use, effectively reducing the complexity of sterilization of the high-pressure canister 100 and lowering consumable costs.

[0053] Please refer to the following: Figures 2 to 5In one embodiment, at least two first stop members 130 are provided at intervals on the inner wall of the cover 110. Further, at least two second stop members 140 are provided at intervals on the outer wall of the housing 120, with the at least two first stop members 130 and at least two second stop members 140 corresponding to each other. Further, when the cover 110 tightly covers the housing 120, the side of the first stop member 130 near the cover 110 tightly abuts against the side of the second stop member 140 near the housing 120. Further, the circumferential distance between two adjacent first stop members 130 is greater than the width of the second stop member 140. Further, the circumferential distance between two adjacent second stop members 140 is greater than the width of the first stop member 130. It is understandable that the sealing effect of the connection between the cover 110 and the outer shell has a great correlation with the pressurization effect of the liquid bag 210. When the cover 110 is connected to the shell 120, the first stop 130 and the second stop 140 are used to stop and limit the connection, thereby ensuring that the cover 110 and the shell 120 are tightly connected. On the basis of realizing the detachable connection between the shell 120 and the cover 110, the sealing performance of the pressurization chamber 101 is ensured.

[0054] Please refer to the following: Figures 2 to 5 In one embodiment, the inner wall of the cover 110 is provided with a can sealing ring 150, which surrounds the peripheral wall of the housing 120. Furthermore, when the cover 110 is tightly closed on the housing 120, the can sealing ring 150 is at least partially sandwiched between the inner wall of the cover 110 and the outer wall of the housing 120. It is understandable that under the stopping and limiting action of the first stop 130 and the second stop 140, since the cover 110 and the shell 120 are rigid structures, even with the cover 110 and the shell 120 tightly connected, the actual sealing at the connection between the cover 110 and the shell 120 will still result in gas leakage, affecting the effective control of the pressure in the pressurization chamber 101, given the high gas pressure inside the pressurization chamber 101. Therefore, when the cover 110 is connected to the shell 120, the tank sealing ring 150 is at least partially sandwiched between the inner wall of the cover 110 and the outer wall of the shell 120, effectively ensuring the sealing effect at the connection between the shell 120 and the cover 110, thereby ensuring the effective control of the gas in the pressurization chamber 101. Furthermore, the tank sealing ring 150 is partially clamped on the inner wall of the cover 110 and the end face of the shell 120 near the cover 110, which further promotes the tank sealing ring 150 to be partially clamped on the inner wall of the cover 110 and the end face of the shell 120 near the cover 110, thereby further improving the sealing effect at the connection between the shell 120 and the cover 110.

[0055] Please refer to the following: Figures 2 to 5In one embodiment, the pressure vessel 100 is a medical-grade 316L stainless steel pressure vessel. Further, the volume of the pressure vessel 100 is 3L to 4L.

[0056] Please refer to the following: Figures 2 to 5 In one embodiment, the wall thickness of the high-pressure pipe 420 is 25mm to 35mm. Furthermore, the burst pressure of the high-pressure pipe 420 is ≥81MPa.

[0057] Please refer to the following: Figures 2 to 5 In one embodiment, the liquid bag 210 is a medical-grade peroxide-cured EPDM liquid bag 210. Further, the wall thickness of the liquid bag 210 is 1.8 mm to 2.5 mm. Further, the volume of the liquid bag 210 is 0.5 L to 1 L smaller than the volume of the high-pressure tube 420. Further, the liquid tube 220 is a medical-grade 316L stainless steel liquid tube 220. Further, the liquid bag 210 contains physiological saline. Further, the output gas pressure range of the high-pressure gas tank 30 is 0 to 40 MPa.

[0058] In one embodiment, the end of the liquid bladder tube is connected to the opening of the liquid bladder bag by a flange, so that the periphery of the opening of the liquid bladder bag is clamped between the flanges, realizing the sealed connection between the liquid bladder bag and the liquid bladder pipe. Furthermore, a liquid bladder sealing ring is provided at the periphery of the opening of the liquid bladder bag. The liquid bladder sealing ring and the periphery of the opening of the liquid bladder bag are clamped together between the flanges, which effectively ensures the sealing of the connection between the liquid bladder bag and the liquid bladder tube. The flange clamping method to achieve the sealed connection between the liquid bladder tube and the liquid bladder bag is a conventional connection method for stable and tight connection between the liquid bladder and the rigid pipe, so it will not be described in detail here.

[0059] This application also provides a medical water jet assembly. The aforementioned medical water jet assembly includes a blade, a high-pressure tube, and a return tube. The blade is connected to the distal end of the high-pressure tube, and at least partially protrudes from the distal end of the return tube, with the opening of the blade facing away from the return tube. A buffer bend is connected to the distal end of the return tube, with its proximal end connected to the distal end of the return tube. The buffer bend is spaced apart from the blade, and its distal end is bent towards the blade, so that the opening of the distal end of the buffer bend is opposite to the opening of the blade, forming an operating window.

[0060] To better understand the medical water jet assembly of this application, the following further explanation is provided: Please refer to the following: Figures 6 to 9One embodiment of the medical water jet assembly 40 includes a blade 410, a high-pressure tube 420, and a return tube 430. The blade 410 is connected to the distal end of the high-pressure tube 420, and the blade 410 at least partially protrudes from the distal end of the return tube 430. The opening of the blade 410 is disposed away from the return tube 430. The distal end of the return tube 430 is connected to a backflow bend 440. The proximal end of the backflow bend 440 is connected to the distal end of the return tube 430, and the backflow bend 440 is spaced apart from the blade 410. The distal end of the backflow bend 440 is bent toward the blade 410 so that the opening of the distal end of the backflow bend 440 is opposite to the opening of the blade 410 to form an operating window 403.

[0061] It is understandable that existing water jets require the cutter head to bend back so that the water jet exiting the cutter head is directed towards the cutter shank. This, in turn, causes the water jet exiting the water jet to be positioned opposite the return pipe, thus achieving the return and discharge of the water jet exiting the cutter head. Please see below. Figures 12 to 13 As shown, the bent part of the cutter head needs to withstand the impact of high-pressure jets, which requires a larger thickness. This results in a greater stress difference between the inside and outside during bending, meaning that the internal shear stress is higher. Consequently, cracking is more likely to occur during the bending process, leading to a lower manufacturing yield. Furthermore, the fact that the bent part of the cutter head needs to withstand the impact of high-pressure jets means that even if the cutter head does not crack during the bending process, it is more prone to cracking under further impact from high-pressure jets. Therefore, please refer to them together. Figures 6 to 9 This causes the cutter head 410 to protrude at least partially from the far end of the return pipe 430, and the far end of the avoidance bend pipe 440 to bend towards the cutter head 410, so that the opening at the far end of the avoidance bend pipe 440 and the opening of the cutter head 410 are positioned opposite each other to form an operation window 403. That is, the cutter head 410 does not bend back, but the avoidance bend pipe 440 bends back, realizing the effective return and discharge of the jet of the cutter head 410 at the avoidance bend pipe 440. When the jet of the cutter head 410 directly or indirectly impacts the opening at the far end of the avoidance bend pipe 440, the impact intensity is greatly reduced, so that the thickness of the avoidance bend pipe 440 is relatively thin enough to withstand the impact, effectively reducing the cracking of the avoidance bend pipe 440 when bending back, reducing the defect rate of the avoidance bend pipe 440 during bending back, and making the jet impact intensity at the avoidance bend pipe 440 smaller, reducing the cracking of the avoidance bend pipe 440 under the impact of high pressure jet.

[0062] In one embodiment, the high-pressure tube includes an inner liner, a reinforcing layer, and an outer sheath, with the reinforcing layer sleeved on the inner liner and the outer sheath sleeved on the reinforcing layer. The inner liner is a medical-grade polyimide layer. Further, the reinforcing layer is a precision-braided layer of 304 stainless steel wire or a precision-braided layer of aramid fiber. Further, the outer sheath is a medical-grade polyurethane layer.

[0063] Please refer to the following: Figures 6 to 9 In one embodiment, the return pipe 430 is provided with a spacer plate 450, which extends along the length of the return pipe 430. The spacer plate 450 is connected to the inner wall of the return pipe 430 to form a first pipe 401 and a second pipe 402. The distal end of the high-pressure pipe 420 is housed in the first pipe 401 and connected to the cutter head 410. The second pipe 402 is connected to the proximal end of the avoidance bend pipe 440. This realizes the independent connection and housing of the high-pressure pipe 420 and the avoidance bend pipe 440 in the return pipe 430, reducing the influence of the return pipe 430 on the return flow of the jet of the cutter head 410, thus ensuring the stable return flow of the jet of the cutter head 410.

[0064] Please refer to the following: Figures 6 to 9 In one embodiment, the end of the second pipe 402 away from the back bend 440 is connected to the negative pressure collection chamber (not shown), further ensuring stable backflow of the jet from the cutter head 410. Furthermore, the negative pressure collection chamber is connected to the second pipe 402 via a collection pipe 480. Furthermore, the collection pipe 480 is a PVC flexible hose.

[0065] Please refer to the following: Figures 6 to 9 In one embodiment, the spacer 450 is made of medical-grade 316L stainless steel. Further, the blade 410 is a medical-grade zirconia ceramic blade or a medical-grade 316L stainless steel blade. Further, the return pipe 430 is a medical-grade 316L stainless steel pipe. Further, the bypass bend 440 is a medical-grade 316L stainless steel pipe.

[0066] Please refer to the following: Figures 6 to 9 In one embodiment, the spacer 450 and the return pipe 430 are integrally formed. Further, the return pipe 430 and the bypass bend pipe 440 are integrally formed. Further, the distance between the opening of the cutter head 410 and the opening at the distal end of the bypass bend pipe 440 is 8mm, i.e., the width of the operating window is 8mm.

[0067] Please refer to the following: Figures 6 to 9 In one embodiment, a handle 460 is sleeved on the reflux tube 430, with both ends of the reflux tube 430 protruding beyond the handle 460. The proximal end of the high-pressure tube 420 also protrudes beyond the handle 460. Furthermore, the handle 460 is a medical-grade ABS handle 460 or a medical-grade PC handle 460. The handle 460 facilitates gripping, improving control of the blade 410 and enhancing operational convenience.

[0068] Please refer to the following: Figure 1 , Figure 3 and Figure 6This application also provides a medical water jet 10A, including a high-pressure gas cylinder 30, a liquid bladder 20, a medical water jet pressurization structure 10 of any of the above embodiments, and a medical water jet assembly 40 of any of the above embodiments. The liquid bladder 20 includes a liquid bladder bag 210 and a liquid bladder tube 220, which communicates with the liquid bladder bag 210. The liquid bladder bag 210 and the liquid bladder tube 220 are housed within a pressurization chamber 101. The high-pressure gas cylinder 30 communicates with an air inlet 102. A connecting hole 103 is used to pass through a high-pressure tube 420, and the outer wall of the high-pressure tube 420 is tightly abutted against the wall of the connecting hole 103. The end of the high-pressure tube 420 located in the pressurization chamber 101 is used to connect with the end of the liquid bladder tube 220 away from the liquid bladder bag 210, and the high-pressure tube 420 communicates with the liquid bladder tube 220. Further, please refer to [the following text is also incomplete and requires further context]. Figures 2 to 5 In this embodiment, the medical water jet pressurization structure 10 includes a high-pressure container 100. The high-pressure container 100 is provided with a pressurization chamber 101, an air inlet 102, and a connecting hole 103. Both the air inlet 102 and the connecting hole 103 are connected to the pressurization chamber 101. The pressurization chamber 101 is used to accommodate the liquid bladder bag 210 and the liquid bladder tube 220. The air inlet 102 is used to connect to the high-pressure gas tank 30. The connecting hole 103 is used to pass through the high-pressure tube 420, and the outer wall of the high-pressure tube 420 tightly abuts against the wall of the connecting hole 103. The end of the high-pressure tube 420 located in the pressurization chamber 101 is used to connect to the end of the liquid bladder tube 220 away from the liquid bladder bag 210, and the high-pressure tube 420 is connected to the liquid bladder tube 220. Further details are provided in the accompanying documentation. Figures 6 to 5 In this embodiment, the medical water jet assembly 40 includes a blade 410, a high-pressure tube 420, and a return tube 430. The blade 410 is connected to the distal end of the high-pressure tube 420, and the blade 410 at least partially protrudes from the distal end of the return tube 430. The opening of the blade 410 is disposed away from the return tube 430. The distal end of the return tube 430 is connected to a backflow avoidance bend 440. The proximal end of the backflow avoidance bend 440 is connected to the distal end of the return tube 430, and the backflow avoidance bend 440 and the blade 410 are spaced apart and separated. The distal end of the backflow avoidance bend 440 is bent toward the blade 410 so that the opening of the distal end of the backflow avoidance bend 440 is opposite to the opening of the blade 410 to form an operating window 403.

[0069] Please refer to the following: Figures 2 to 9It is understandable that the cutter head 410 does not need to bend back to achieve straight jet transmission, thus avoiding the formation of eddies in the jet at the bend of the cutter head 410, which would cause the jet at the opening of the cutter head 410 to partially diverge, affecting the tissue selective cutting accuracy of the medical water jet and causing blurred operating vision. Furthermore, although the blade head 410 does not need to bend back, if there is a pulse in the jet, that is, without the addition of an active pulse elimination device, there will be jet pressure fluctuations, which will cause the jet energy to be unstable and still cannot achieve precise tissue selective cutting. Adding an active pulse elimination device will complicate the structure of the medical water jet. In addition, the active pulse elimination device also needs to contact the liquid in the liquid bag 210, thus still having the problems of complex sterilization and high consumable costs. In this application, the blade head 410 does not need to bend back to achieve direct jet transmission. In addition, the liquid bag 210, liquid bag tube 220 and high pressure tube 420 are respectively set without contact with the pressurization chamber 101. The pressurization chamber 101 pressurizes the liquid bag 210 by inputting high pressure gas into it through the high pressure gas tank 30, thereby realizing that the liquid in the high pressure tube 420 is a high pressure jet. This not only effectively improves the tissue selective cutting accuracy of the medical water jet and reduces the blurring of the operating field of vision caused by the jet, but also reduces the sterilization complexity of the high pressure tank 100 and reduces the cost of consumables.

[0070] Compared with the prior art, the present invention has at least the following advantages: The medical water jet pressurization structure 10 of the present invention enables the high-pressure tank 100 to have a pressurization chamber 101, which is used to accommodate the liquid bag 210 and the liquid tube 220. The liquid bag 210 and the liquid tube 220 are placed independently within the pressurization chamber 101, with no direct contact between the pressurization chamber 101 and the interior of the liquid bag 210 and the liquid tube 220. The air inlet 102 of the high-pressure tank 100 is used to communicate with the high-pressure gas tank 30, enabling the input of high-pressure gas into the pressurization chamber 101. A connecting hole 103 is used to insert a high-pressure tube 420, with the outer wall of the high-pressure tube 420 tightly abutting against the wall of the connecting hole 103. This allows the high-pressure tube 420 to extend into the high-pressure tank 100 and seal the connecting hole 103. Based on the high-pressure tube 420 extending into the high-pressure tank 100, the high-pressure tank 100... The sealing of the pressurization chamber 101 within the pressure chamber further allows the end of the high-pressure pipe 420 located in the pressurization chamber 101 to connect with the end of the liquid bladder tube 220 away from the liquid bladder bag 210, thus enabling communication between the high-pressure pipe 420 and the liquid bladder tube 220. This achieves internal communication between the high-pressure pipe 420 and the liquid bladder tube 220, while ensuring no direct contact between the inside of the high-pressure pipe 420 and the pressurization chamber 101. Even when the high-pressure gas tank 30 inputs high-pressure gas into the pressurization chamber 101, the high-pressure gas pressurizes and compresses the liquid bladder bag 210, causing the liquid in the liquid bladder bag 210 to be output through the liquid bladder tube 220 to the high-pressure pipe 420. The liquid in the liquid bladder bag 210 does not come into contact with the high-pressure tank 100 during the transmission process. This achieves pressurized output of the liquid in the liquid bladder bag 210, reducing the sterilization complexity of the high-pressure tank 100 and lowering consumable costs.

[0071] The above embodiments merely illustrate several implementation methods of this application to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Furthermore, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this application, and the equivalent forms obtained also fall within the scope of protection of this application. It should also be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. A medical water jet pressurization structure, characterized in that, The medical water jet is used to pressurize a liquid sac. The liquid sac includes a liquid sac bag and a liquid sac tube, with the liquid sac tube communicating with the liquid sac bag. The pressurization structure of the medical water jet includes: A high-pressure tank is provided with a pressurization chamber, an air inlet, and a connecting hole. The air inlet and the connecting hole are both connected to the pressurization chamber. The pressurization chamber is used to accommodate the liquid bladder bag and the liquid bladder tube. The air inlet is used to connect to a high-pressure gas tank. The connecting hole is used to pass through a high-pressure tube, and the outer wall of the high-pressure tube is tightly abutted against the wall of the connecting hole. The end of the high-pressure tube located in the pressurization chamber is used to connect to the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure tube is connected to the liquid bladder tube.

2. The medical water jet pressurization structure according to claim 1, characterized in that, The high-pressure pipe is screwed to the connecting hole, and a first pipe sealing ring is fitted onto the wall of the connecting hole. The first pipe sealing ring is used to clamp between the outer wall of the high-pressure pipe and the wall of the connecting hole; and / or, The high-pressure tube is screwed to the liquid bladder tube, and a second pipe sealing ring is fitted onto the outer wall of the high-pressure tube. The second pipe sealing ring is used to clamp between the outer wall of the high-pressure tube and the inner wall of the liquid bladder tube; and / or, An integrated high-pressure control mechanism is provided between the high-pressure gas tank and the air inlet. The integrated high-pressure control mechanism is connected to both the high-pressure gas tank and the air inlet. The high-pressure control mechanism is used to regulate the gas pressure of the high-pressure tank; and / or, The medical water jet pressurization structure also includes a safety redundancy protection mechanism. The safety redundancy protection mechanism includes a main unit, a first pressure sensor, a second pressure sensor, a spring-loaded micro-opening closed safety valve, and an emergency button, all electrically connected to the main unit. The first pressure sensor is located at the high-pressure tank, the second pressure sensor is located at the high-pressure pipe, and the spring-loaded micro-opening closed safety valve is connected to the high-pressure tank.

3. The medical water jet pressurization structure according to claim 1, characterized in that, The high-pressure tank includes a cover and a shell. The cover is detachably and tightly fitted onto the shell to form the pressurization chamber. The air inlet and the connecting hole are independently provided on the cover or the shell.

4. The medical water jet pressurization structure according to claim 3, characterized in that, At least two first stop members are provided on the inner wall of the cover at intervals; At least two second stop members are provided on the outer wall of the housing at intervals, and at least two first stop members and at least two second stop members are provided in a one-to-one correspondence; When the cover is tightly fitted onto the housing, the side of the first stop member near the cover member tightly abuts against the side of the second stop member near the housing member; and / or, The inner wall of the cover is provided with a tank sealing ring, which surrounds the peripheral wall of the shell. When the cover is tightly fitted onto the shell, the tank sealing ring is at least partially sandwiched between the inner wall of the cover and the outer wall of the shell.

5. The medical water jet pressurization structure according to claim 1, characterized in that, The high-pressure tank is a medical-grade 316L stainless steel high-pressure tank; and / or, The high-pressure tank has a volume of 3L~4L; and / or, The wall thickness of the high-pressure pipe is 25mm~35mm; and / or, The burst pressure of the high-pressure pipe is ≥81MPa; and / or, The liquid bladder is a medical-grade peroxide-cured EPDM liquid bladder; and / or, The wall thickness of the liquid bladder is 1.8 mm to 2.5 mm; and / or, The volume of the liquid bladder is 0.5L to 1L smaller than the volume of the high-pressure tube; and / or, The bladder tube is a medical-grade 316L stainless steel bladder tube; and / or, The end of the liquid bladder tube is connected to the opening of the liquid bladder bag via a flange; and / or, The fluid-filled pouch contains physiological saline; and / or... The output gas pressure range of the high-pressure gas tank is 0~40MPa.

6. A medical water jet assembly, comprising a blade, a high-pressure tube, and a return tube, characterized in that, The cutter head is connected to the distal end of the high-pressure pipe, and the cutter head at least partially protrudes from the distal end of the return pipe, with the opening of the cutter head facing away from the return pipe. The distal end of the return pipe is connected to a backflow bend, the proximal end of the backflow bend is connected to the distal end of the return pipe, and the backflow bend is spaced apart from the cutter head. The distal end of the backflow bend is bent toward the cutter head so that the opening of the distal end of the backflow bend is opposite to the opening of the cutter head to form an operating window.

7. The medical water jet assembly according to claim 6, characterized in that, The return pipe is provided with a partition plate that extends along the length of the return pipe. The partition plate is connected to the inner wall of the return pipe to form a first pipe and a second pipe. The distal end of the high-pressure pipe is housed in the first pipe and connected to the cutter head. The second pipe is connected to the proximal end of the avoidance bend pipe.

8. The medical water jet assembly according to claim 7, characterized in that, The end of the second pipe furthest from the bypass bend is used to communicate with the negative pressure collection chamber; and / or, The spacer plate is made of medical-grade 316L stainless steel; and / or, The partition plate and the return pipe are integrally formed.

9. The medical water jet assembly according to claim 6, characterized in that, The return pipe and the avoidance bend pipe are integrally formed; and / or The blade is a medical-grade zirconia ceramic blade or a medical-grade 316L stainless steel blade; and / or, The reflux pipe is a medical-grade 316L stainless steel pipe; and / or, The bypass bend is made of medical-grade 316L stainless steel; and / or, The distance between the opening of the cutter head and the opening at the distal end of the avoidance bend is 8 mm; and / or, A handle is fitted onto the return pipe, and both ends of the return pipe protrude beyond the handle. The proximal end of the high-pressure pipe also protrudes beyond the handle.

10. A medical water knife, characterized in that, The device includes a high-pressure gas cylinder, a liquid bladder, a medical water jet pressurization structure according to any one of claims 1 to 5, and a medical water jet assembly according to any one of claims 6 to 9. The liquid bladder includes a liquid bladder bag and a liquid bladder tube, the liquid bladder tube is connected to the liquid bladder bag, and the liquid bladder bag and the liquid bladder tube are housed in the pressurization chamber. The high-pressure gas tank is connected to the air inlet, and the connecting hole is used to pass through the high-pressure pipe. The outer wall of the high-pressure pipe is tightly abutted against the hole wall of the connecting hole. The end of the high-pressure pipe located in the pressurization chamber is used to connect to the end of the liquid bladder tube away from the liquid bladder bag, and the high-pressure pipe is connected to the liquid bladder tube.

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