Pressure balance structure, endoscope and placement system

Abstract

The present invention provides a pressure balance structure, an endoscope and an insertion system, belonging to the technical field of medical devices. The pressure balance structure of the present invention includes a connecting member and an adjusting member. The connecting member has a communication cavity, an instrument inlet and a liquid injection port. The connecting member is installed on the handle part, and the instrument inlet and the liquid injection port are connected to the instrument channel through the communication cavity. The adjusting member is installed on the connecting member and can adaptively adjust the volume of the communication cavity according to the change of the pressure in the instrument channel. In the case of increasing pressure, the adjusting member increases the volume of the communication cavity; in the case of decreasing pressure, the adjusting member decreases the volume of the communication cavity, so as to realize the real-time balance of the pressure in the instrument channel. By dynamically adjusting the volume of the communication cavity, the present invention effectively solves the safety hazards caused by the pressure fluctuation of the flushing liquid in endoscopic surgery, improves the operation stability and surgical safety, and is applicable to the medical fields related to endoscopes.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a pressure balancing structure, an endoscope and an implantation system. Background Art

[0002] With the rapid advancement of medical technology, medical endoscopes have become key tools for diagnosing and treating a variety of diseases such as the digestive system and urinary system. In particular, they are indispensable in dealing with stone diseases (such as kidney stones and gallstones). In lithotripsy surgery of the urinary system, percutaneous nephrolithotomy (PCNL) is a common and effective treatment method. The endoscope is guided through the sheath into the renal pelvis and the stones are crushed using lasers or other energy sources. After lithotripsy, the gap between the endoscope and the sheath is usually used to form a reflux channel to help discharge the crushed stones and flushing fluid, ensure that the operation area remains clean, and reduce complications.

[0003] Through long-term surgical practice, the inventors found that during lithotripsy surgery using an endoscope and a sheath to guide the patient into the renal pelvis, patients often feel uncomfortable. Summary of the invention

[0004] In order to improve the patient discomfort during lithotripsy, the present application provides a pressure balancing structure, an endoscope and an insertion system.

[0005] In a first aspect, the present application provides a pressure balancing structure, which adopts the following technical solution:

[0006] A pressure balancing structure is applied to the handle portion of an endoscope, wherein the distal end of the handle portion is connected to an insertion portion, wherein an instrument channel communicating with the handle portion is provided through the insertion portion, and the pressure balancing structure comprises: a connecting piece having a communicating cavity, an instrument inlet and an injection port, wherein the connecting piece is mounted on the handle portion, wherein both the instrument inlet and the injection port are connected to the instrument channel through the communicating cavity; and an adjusting piece mounted on the connecting piece, wherein the adjusting piece can adaptively adjust the volume of the communicating cavity when the pressure in the instrument channel changes, wherein when the pressure in the instrument channel gradually increases, the adjusting piece correspondingly gradually increases the volume of the communicating cavity; and when the pressure in the instrument channel gradually decreases, the adjusting piece correspondingly gradually decreases the volume of the communicating cavity.

[0007] Preferably, the adjusting member includes a partition portion, which is movably arranged in the connecting cavity, and the partition portion divides the connecting cavity into a first cavity and a second cavity which are isolated from each other, and the second cavity is connected to the instrument channel, wherein, when the pressure in the instrument channel gradually increases, the partition portion approaches the first cavity side so that the volume of the first cavity gradually decreases and the volume of the second cavity gradually increases; when the pressure in the instrument channel gradually decreases, the partition portion approaches the second cavity side so that the volume of the second cavity gradually decreases and the volume of the first cavity gradually increases.

[0008] Preferably, the adjusting member further comprises a moving portion, and the moving portion is movably disposed in the second cavity, wherein when the pressure in the instrument channel gradually increases, the inlet end area of ​​the instrument channel gradually decreases under the action of the moving portion; when the pressure in the instrument channel gradually decreases, the inlet end area of ​​the instrument channel gradually increases under the action of the moving portion.

[0009] Preferably, the partition part is slidably sealed in the connecting cavity, the movable part is connected to the partition part and slidably arranged in the second cavity, the movable part is provided with an adjustment port, and the second cavity is axially connected with the instrument channel through the adjustment port; when the partition part approaches the first cavity side, the adjustment port and the inlet end of the instrument channel are gradually misaligned in the axial direction; when the partition part approaches the second cavity side, the adjustment port and the inlet end of the instrument channel are gradually opposite in the axial direction.

[0010] Preferably, the adjusting member also includes a limiting portion, and when the pressure in the instrument channel gradually increases, the limiting portion can cooperate with the partition portion in the connecting cavity; the limiting portion can be adjustably arranged on the connecting member to adjust the matching position of the limiting portion and the partition portion in the connecting cavity.

[0011] Preferably, the adjusting member further comprises an elastic portion, which is telescopically disposed in the connecting cavity and connected to the partition portion, and when the elastic portion is in a natural state, the adjusting port is axially opposite to the inlet end of the instrument channel.

[0012] Preferably, the connecting member further has a vent, and the first cavity is connected to the outside through the vent.

[0013] Preferably, the vent is covered with an elastic diaphragm, and the elastic diaphragm can be deformed under the action of external force.

[0014] In the second aspect, the present application also provides an endoscope, comprising a handle portion, an insertion portion and the pressure balance structure described in the above technical solution, wherein the insertion portion is connected to the distal end of the handle portion, and the pressure balance structure is detachably installed on the instrument port of the handle portion; the front end of the insertion portion has a pressure sensor; and / or the connecting cavity and / or the instrument channel has a pressure sensor.

[0015] In a third aspect, the present application also provides an insertion system, comprising a sheath and an endoscope as described in the above technical solution, wherein the endoscope has a suction valve, the sheath has a suction channel, and the suction channel is connected to the suction valve.

[0016] The present invention has the following advantages and beneficial effects:

[0017] The pressure balance structure of the present invention significantly improves the pressure control effect in the instrument channel of the endoscope handle through the coordinated design of the unique connecting parts, adjusting parts, partition parts and moving parts, which is specifically manifested in that the stability and real-time performance of pressure regulation and the safety of the operation process are significantly enhanced. During the operation, the fluctuation of the flushing fluid pressure may cause damage to the tissue, bleeding, and even affect the clarity of the operator's field of vision. The present invention automatically and adaptively adjusts the volume of the connecting cavity when the pressure increases or decreases through the adjusting part, so that the pressure fluctuation can be quickly balanced, thereby avoiding damage to the instrument channel caused by excessive pressure or insufficient flushing fluid supply caused by too low pressure.

[0018] Furthermore, the connecting cavity is divided into a first cavity and a second cavity by a partition part, and combined with the design of the movable part and its regulating port, the present invention can dynamically adjust the connecting area between the connecting cavity and the instrument channel, thereby more accurately controlling the flow rate of the flushing liquid. When the pressure of the instrument channel increases, the movable part gradually reduces the inlet end area, slows down the inflow speed of the flushing liquid, and prevents the pressure from further increasing; when the pressure of the instrument channel decreases, the inlet end area increases to increase the flushing liquid flow rate, thereby maintaining the appropriate pressure required during the operation. This design can not only achieve pressure balance in a very short time, but also improve the utilization efficiency of the flushing liquid and ensure the stability of the flushing process.

[0019] In addition, the present invention further optimizes the dynamic response capability of pressure regulation through the sliding seal and axial misalignment design between the partition part and the moving part, avoiding the failure problem of traditional devices due to structural complexity or adjustment lag. The entire system has a compact structure and is easy to install, which is particularly suitable for the delicate operation requirements of endoscopes in complex surgical environments. In general, the present invention effectively solves various problems caused by pressure fluctuations in the prior art, greatly improves surgical safety, efficiency and ease of operation, and has important practical value and broad clinical application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0022] Figure 2 This is a partial schematic diagram of an embodiment of the present application. Figure 1 ;

[0023] Figure 3 This is a partial schematic diagram of an embodiment of the present application. Figure 2 ;

[0024] Figure 4 This is a partial schematic diagram of an embodiment of the present application. Figure 3 ;

[0025] Figure 5 This is a schematic diagram of the state of the embodiment of the present application for showing the internal structure of the connector Figure 1 ;

[0026] Figure 6 This is a schematic diagram of the state of the embodiment of the present application for showing the internal structure of the connector Figure 2 .

[0027] The markings in the figure are:

[0028] 100, handle part; 200, insertion part; 210, instrument channel; 300, connector; 310, connecting cavity; 311, first cavity; 312, second cavity; 320, instrument inlet; 330, injection port; 340, vent; 341, elastic diaphragm; 400, adjusting part; 410, partition part; 420, moving part; 421, adjusting port; 430, limiting part; 431, adjusting knob; 440, elastic part; 500, sheath; 600, suction valve. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0031] With the rapid development of medical technology, medical endoscopes have been widely used in the diagnosis and treatment of diseases such as the digestive system and the urinary system. Especially when dealing with stone diseases (such as kidney stones and gallstones), medical endoscopes are indispensable tools. In the lithotripsy of the urinary system, percutaneous nephrolithotomy (PCNL) is a common and efficient treatment method. It usually uses an endoscope to guide the renal pelvis through the sheath and crush the stones with the help of laser or other energy sources. After the lithotripsy is completed, the gap between the endoscope and the sheath forms a reflux channel for discharging the gravel and flushing fluid to keep the operation area clean and reduce postoperative complications. Specifically, the flushing fluid is injected through the instrument tube and sucked by the sheath to form a circulating flow to remove the gravel debris and maintain a clear surgical field of view. However, although the flushing process seems simple, there are still many technical problems that need to be solved in actual operation.

[0032] In the prior art, the pressure of the flushing fluid is often unstable due to the dynamic activity of the tissues in the body and the pressure fluctuations when the flushing fluid is injected. In particular, when the pressure of the injected flushing fluid exceeds the safety threshold, it may have serious consequences for the patient. For example, excessive pressure may cause damage to the kidneys or other soft tissues, and even lead to serious complications such as tissue rupture and bleeding, seriously threatening the patient's life safety. In addition, the unstable flushing fluid pressure may also affect the clarity of the surgical area, increase the difficulty of the operator's operation, and thus prolong the operation time or reduce the efficiency of the operation. At the same time, during the operation, pressure fluctuations may cause discomfort to the patient, further affecting the smooth progress of the operation. These problems show that in urinary system lithotripsy, the existing technology lacks effective control of the flushing fluid pressure, resulting in the inability to ensure that the pressure is always maintained within a safe range, thereby limiting the clinical application effect of the relevant technology.

[0033] Therefore, how to develop a technical means to control the pressure of the flushing fluid in urinary lithotripsy to ensure that the flushing fluid flows within a safe range is not only the key to improving surgical safety and efficiency, but also an important direction to solve the discomfort of patients during surgery. The realization of this technology will effectively improve postoperative recovery, reduce surgery-related complications, and significantly improve the technical level and medical quality in the field of urology.

[0034] Based on this, the present application provides a pressure balancing structure, an endoscope and an insertion system.

[0035] Please refer to Figure 1 to Figure 6 In the first aspect, the pressure balance structure provided by the present application is applied to the handle portion 100 of the endoscope. The distal end of the handle portion 100 is connected to the insertion portion 200. The handle portion 100 is mainly used for the operator to hold it, and the insertion portion 200 is used to insert into the human body cavity. The insertion portion 200 is provided with an instrument channel 210 connected to the handle portion 100. The instrument channel 210 can be used for other external surgical instruments to enter, such as a stone removal basket, a laser lithotripsy instrument, or other common surgical medical instruments.

[0036] Exemplary, combined Figure 2 , Figure 3 and Figure 4 The pressure balance structure includes a connector 300 and an adjusting member 400; wherein the connector 300 has a connecting cavity 310, an instrument inlet 320 and a liquid injection port 330, and the connector 300 is mounted on the handle portion 100, and the instrument inlet 320 and the liquid injection port 330 are both connected to the instrument channel 210 through the connecting cavity 310. Exemplarily, the connector 300 can be used as a connecting port between an external instrument and the insertion portion 200, which can facilitate the external instrument to extend into the connecting cavity 310 through the instrument inlet 320, and then continue to extend into the instrument channel 210 through the connecting cavity 310. Similarly, the liquid injection port 330 on the connector 300 can be used for instruments that spray liquid to enter at the same time, so that at least two external instruments can be installed on the connector 300 at the same time, and reach the inside of the human body cavity through the instrument channel 210 of the insertion portion 200, greatly improving the convenience of operation during surgery.

[0037] Exemplarily, the adjusting member 400 is mounted on the connecting member 300, and the adjusting member 400 can adaptively adjust the volume of the connecting cavity 310 when the pressure in the instrument channel 210 changes. Exemplarily, when a group of external instruments is connected to the connecting member 300 through the instrument inlet 320, and another group of external instruments is connected to the connecting member 300 through the injection port 330, the instrument inlet 320 and the injection port 330 are both isolated from the outside world, that is, the connecting cavity 310 and the instrument channel 210 are in a state of air pressure balance in the same sealed environment.

[0038] At the same time, when the pressure in the instrument channel 210 gradually increases, the regulating member 400 correspondingly gradually increases the volume of the connecting cavity 310; when the pressure in the instrument channel 210 gradually decreases, the regulating member 400 correspondingly gradually decreases the volume of the connecting cavity 310.

[0039] On this basis, the adjusting member 400 can adaptively adjust the connecting volume between the connecting cavity 310 and the instrument channel 210, so as to achieve dynamic balance when the pressure in the instrument channel 210 fluctuates, ensuring that the pressure is always maintained within a safe range. Specifically, the connecting cavity 310 connects the instrument inlet 320 and the injection port 330 to the instrument channel 210, so as to ensure that the pressure regulation mechanism can directly act on the flow path of the flushing fluid during the operation, thereby providing a basis for precise pressure control. Secondly, the design of the adjusting member 400 enables it to automatically increase the volume of the connecting cavity 310 when the pressure in the instrument channel 210 gradually increases, thereby absorbing excess pressure, preventing the pressure from exceeding the safety threshold, and avoiding damage to the kidney or soft tissue caused by excessive pressure, such as complications such as tissue rupture or bleeding. At the same time, when the pressure in the instrument channel 210 gradually decreases, the adjusting member 400 compensates for the lack of pressure by reducing the volume of the connecting cavity 310 to ensure the stability of the flushing fluid flow. This dynamic adjustment function can not only ensure a clear view of the surgical area, but also effectively reduce the discomfort of the patient caused by pressure fluctuations, and improve the smoothness and safety of the operation. In addition, through the adaptive adjustment function of the adjustment member 400, the structure can quickly respond while monitoring the pressure changes of the instrument channel 210 in real time, thereby solving the technical defects of the existing equipment in the background technology that lack pressure monitoring and control. This dynamic response capability significantly improves the efficiency and accuracy of the flushing fluid pressure control, providing higher operational safety and better medical effects for urinary system lithotripsy.

[0040] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, the adjusting member 400 includes a partition portion 410, which is movably disposed in the connecting cavity 310. Exemplarily, the extending direction of the connecting cavity 310 is parallel to the extending direction of the liquid injection port 330, and the extending direction of the connecting cavity 310 is perpendicular to the extending direction of the instrument inlet 320 and the instrument channel 210 in a straight state. In this case, the partition portion 410 slides along the length direction of the connecting cavity 310.

[0041] Exemplarily, the partition part 410 divides the connecting cavity 310 into a first cavity 311 and a second cavity 312 which are isolated from each other, and the second cavity 312 is connected to the instrument channel 210. When the pressure in the instrument channel 210 gradually increases, the partition part 410 approaches the first cavity 311 so that the volume of the first cavity 311 gradually decreases and the volume of the second cavity 312 gradually increases; when the pressure in the instrument channel 210 gradually decreases, the partition part 410 approaches the second cavity 312 so that the volume of the second cavity 312 gradually decreases and the volume of the first cavity 311 gradually increases. Exemplarily, the moving direction of the partition part 410 is adapted to the pressure change in the instrument channel 210, that is, one of the power sources driving the partition part 410 to move in the connecting cavity 310 is the thrust generated by the pressure change in the instrument channel 210.

[0042] On this basis, the partition part 410 is movably arranged in the connecting cavity 310, and can be adjusted in position according to the change of pressure in the instrument channel 210. When the pressure in the instrument channel 210 gradually increases, the partition part 410 moves toward the first cavity 311, thereby compressing the volume of the first cavity 311 and increasing the volume of the second cavity 312. This change enables the second cavity 312 to absorb the excess pressure from the instrument channel 210, avoiding the pressure from exceeding the safety range, thereby effectively preventing damage to the kidney or other soft tissues caused by excessive pressure, such as tissue rupture, bleeding, etc. In addition, when the pressure in the instrument channel 210 gradually decreases, the partition part 410 moves toward the second cavity 312, reducing the volume of the second cavity 312 and increasing the volume of the first cavity 311, thereby compensating for the insufficient pressure in the instrument channel 210 and ensuring the continuity and stability of the flow of the flushing fluid. This two-way adjustment mechanism can not only balance the pressure in the instrument channel 210 in real time, but also respond quickly when pressure fluctuations occur, significantly improving the accuracy and efficiency of flushing fluid pressure control.

[0043] At the same time, since the partition 410 separates the connecting cavity 310 into the independent first cavity 311 and the second cavity 312, the backflow of the flushing fluid during the pressure change process can be effectively avoided, further ensuring the cleanliness of the surgical area and the clarity of the visual field. In this case, the safety and efficiency of the urinary system lithotripsy can be ensured, while overcoming various problems caused by inaccurate pressure regulation in the prior art, and improving the application effect and reliability of the endoscope in this field.

[0044] Exemplarily, the partition part 410 is slidably sealed in the communication cavity 310. Furthermore, a sealing strip is embedded on the inner wall side of the partition part 410 and the communication cavity 310, and the sealing strip is slidably abutted against the inner wall of the communication cavity 310, which can ensure the sealing degree of the gap between the partition part 410 and the inner wall of the communication cavity 310 to a certain extent, and can also allow the partition part 410 to achieve relatively smooth sliding in the length direction of the communication cavity 310.

[0045] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, the adjusting member 400 further includes a moving portion 420, which is movably disposed in the second cavity 312. Exemplarily, the moving portion 420 is disposed on the side of the partition portion 410 facing the second cavity 312, and the moving portion 420 also moves along the length direction of the connecting cavity 310. When the pressure in the instrument channel 210 gradually increases, the inlet end area of ​​the instrument channel 210 gradually decreases under the action of the moving portion 420; when the pressure in the instrument channel 210 gradually decreases, the inlet end area of ​​the instrument channel 210 gradually increases under the action of the moving portion 420.

[0046] Exemplarily, the movable part 420 is provided with an adjustment port 421, and the adjustment port 421 is arranged through the movable part 420 along the thickness direction of the movable part 420. Further, the second cavity 312 is axially connected with the instrument channel 210 through the adjustment port 421. It is worth noting that when the adjustment port 421 is axially connected with the instrument channel 210, the adjustment member 400 is in an idle state. Exemplarily, when the partition part 410 approaches the first cavity 311 side, the adjustment port 421 and the inlet end of the instrument channel 210 are gradually misaligned in the axial direction; when the partition part 410 approaches the second cavity 312 side, the adjustment port 421 and the inlet end of the instrument channel 210 are gradually facing each other in the axial direction. Further, the inlet end of the instrument channel 210 refers to the connection point between the connecting cavity 310 and the instrument channel 210.

[0047] On this basis, the movable part 420 is movably arranged in the second cavity 312, and can adjust the size of the connection area of ​​the connection point between the connecting cavity 310 and the instrument channel 210 when the pressure of the instrument channel 210 changes. When the pressure in the instrument channel 210 gradually increases, the movable part 420 acts to gradually reduce the connection area of ​​the connection point between the connecting cavity 310 and the instrument channel 210, thereby limiting the flow of the flushing liquid and preventing the pressure from further rising; on the contrary, when the pressure in the instrument channel 210 gradually decreases, the inlet end area of ​​the instrument channel 210 gradually increases under the action of the movable part 420, thereby increasing the flow of the flushing liquid and compensating for the insufficient pressure. This design realizes the active control of the pressure of the instrument channel 210, so that the pressure fluctuation can be effectively suppressed.

[0048] At the same time, the moving part 420 is connected to the partition part 410 and is slidably arranged in the second cavity 312, and its regulating port 421 makes the second cavity 312 axially connected with the instrument channel 210 through the regulating port 421. When the partition part 410 approaches the first cavity 311, the regulating port 421 and the inlet end of the instrument channel 210 are gradually dislocated in the axial direction, thereby reducing the connecting area between the connecting cavity 310 and the instrument channel 210 and reducing the risk of pressure accumulation; and when the partition part 410 approaches the second cavity 312, the regulating port 421 and the inlet end of the instrument channel 210 are gradually facing each other, so that the connecting area is increased, and the flow rate of the flushing fluid is increased to maintain pressure balance. This dynamic dislocation design not only further improves the accuracy of pressure regulation, but also optimizes the controllability of fluid flow, avoiding the problem of poor flushing effect or blurred vision in the surgical area due to pressure changes.

[0049] In summary, the setting of the partition part 410 and the movable part 420 can perform dual control of the flow rate and pressure while responding to pressure changes in real time, thereby effectively solving the problems of tissue damage, bleeding, and discomfort during surgery that may be caused by the pressure fluctuation of the flushing fluid mentioned in the background technology. In addition, this structural design avoids the control failure caused by the hysteresis or complexity of the traditional pressure regulating device, and significantly improves the adaptability and safety of the equipment in complex surgical environments. In general, the introduction of the movable part 420 and its regulating port 421 makes the regulating performance of the pressure balance structure more refined and intelligent, providing a better solution for the flushing fluid pressure control during the operation, and ensuring the safety and operational stability of urinary system lithotripsy.

[0050] Exemplarily, the partition part 410 and the movable part 420 are both sliding plates, and the partition part 410 and the movable part 420 are perpendicular to each other and form an "L" shape, so that they can be easily installed. At the same time, when the pressure in the connecting cavity 310 changes, the partition part 410 and the movable part 420 can be effectively driven to achieve adaptive displacement.

[0051] Exemplarily, the opening area of ​​the adjustment port 421 is larger than the cross-sectional area of ​​the instrument channel 210, and when the moving portion 420 is at the maximum offset position, the adjustment port 421 still remains connected to the port of the instrument channel 210. This can avoid, to a certain extent, the closure caused by the adjustment port 421 and the instrument channel 210 being completely misaligned.

[0052] In some embodiments, Figure 4 , Figure 5 and Figure 6As shown, the adjusting member 400 further includes a limiting portion 430. When the pressure in the instrument channel 210 gradually increases, the limiting portion 430 can be limited and matched with the partition portion 410 in the connecting cavity 310. Exemplarily, the limiting portion 430 can be adjusted on the connecting member 300 to adjust the matching position of the limiting portion 430 and the partition portion 410 in the connecting cavity 310. Specifically, the limiting portion 430 is a threaded rod, and a threaded hole is provided on the end of the connecting member 300 away from the injection port 330. The length direction of the threaded hole is parallel to the length direction of the connecting cavity 310, and the threaded rod is threadedly inserted in the threaded hole and one end extends into the first cavity 311. After such arrangement, when the threaded rod moves axially into the first cavity 311, the displacement length of the partition portion 410 in the first cavity 311 is reduced, and vice versa. In this way, the displacement range of the partition part 410 can be adaptively adjusted according to different surgical environments. For example, in a surgical environment with large pressure changes, the threaded rod can be moved outside the first cavity 311 so that the end of the threaded rod gradually moves away from the partition part 410 and the displacement length of the partition part 410 increases, thereby avoiding to a certain extent the situation where the pressure cannot be effectively absorbed after the end of the threaded rod abuts against the partition part 410.

[0053] Exemplarily, an adjustment knob 431 is provided at one end of the limiting portion 430 located outside the connecting member 300 , and the adjustment knob 431 can facilitate an operator to adjust the position of the limiting portion 430 , thereby improving the convenience of adjustment.

[0054] Furthermore, the width of the first cavity 311 is greater than the width of the second cavity 312. Exemplarily, the partition part 410 is slidably disposed in the first cavity 311, and when the partition part 410 slides toward the second cavity 312, it will be restricted by the wall of the first cavity 311 that is larger than the second cavity 312 and cannot continue to slide toward the second cavity 312, thereby effectively limiting the movement range of the partition part 410, and to a certain extent avoiding the partition part 410 from exceeding the predetermined range and causing an uncontrollable situation.

[0055] In some embodiments, in combination Figure 4 , Figure 5 and Figure 6, the adjusting member 400 further includes an elastic portion 440, which is retractably arranged in the connecting cavity 310 and connected to the partition portion 410. When the elastic portion 440 is in a natural state, the adjusting port 421 is axially opposite to the inlet end of the instrument channel 210. Further, when the adjusting port 421 is axially opposite to the inlet end of the instrument channel 210, the partition portion 410 and the limiting portion 430 are also in a limited fit state. Exemplarily, the elastic portion 440 is a spring, and the elastic expansion direction of the spring is consistent with the length direction of the connecting cavity 310. Specifically, one end of the spring is connected to the end of the connecting cavity 310, and the other end is connected to the opposite wall of the partition portion 410. When the pressure in the connecting cavity 310 and the instrument channel 210 increases, the partition portion 410 is subjected to the pressure and moves toward the direction close to the first cavity 311 to compress the spring. When the pressure in the connecting cavity 310 and the instrument channel 210 decreases, the spring in the compressed state will push the partition part 410 back to the initial position under the action of its own elastic force, so that the partition part 410 can achieve the effect of automatic reset when the pressure in the connecting cavity 310 and the instrument channel 210 decreases.

[0056] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, the connector 300 also has a vent 340, and the first cavity 311 is connected to the outside through the vent 340. Exemplarily, the vent 340 is arranged on the end wall of the connector 300 away from the second cavity 312. After such arrangement, the first cavity 311 can be kept in communication with the outside, so that when the partition part 410 moves in the first cavity 311, the first cavity 311 can always be kept in communication with the outside, so that the partition part 410 can move normally in the first cavity 311.

[0057] In some embodiments, Figure 5 and Figure 6 As shown, in order to prevent foreign matter from accidentally entering the first cavity 311 through the vent 340, thereby interfering with the movement of the partition part 410. Therefore, an elastic diaphragm 341 is provided on the vent 340, and the elastic diaphragm 341 can be deformed under the action of external force. After being arranged in this way, the elastic diaphragm 341 can prevent foreign matter from accidentally entering the first cavity 311 through the vent 340, and can also adapt to the pressure changes caused by the displacement of the partition part 410 in the first cavity 311. That is, when the partition part 410 approaches the elastic diaphragm 341 along the length direction of the first cavity 311, the space between the elastic diaphragm 341 and the partition part 410 will gradually decrease, and the corresponding pressure will increase. At this time, the elastic diaphragm 341 will expand outside the first cavity 311 to adapt to the increase in pressure in the first cavity 311, and vice versa, it will expand into the first cavity 311.

[0058] See also Figure 1 to Figure 6 In the second aspect, the present application also provides an endoscope, comprising a handle portion 100, an insertion portion 200 and a pressure balance structure in any of the above schemes, wherein the insertion portion 200 is connected to the distal end of the handle portion 100, and the pressure balance structure is detachably mounted on the instrument port of the handle portion 100. Exemplarily, the front end of the insertion portion 200 has a pressure sensor; and / or, the communicating cavity 310 and / or the instrument channel 210 has a pressure sensor. By setting the pressure sensor, the pressure change in the instrument channel 210 during the operation can be monitored at any time, so that the pressure value can be adaptively adjusted.

[0059] See also Figure 1 to Figure 6 In a third aspect, the present application also provides an insertion system, including a sheath 500 and an endoscope of the above-mentioned scheme; illustratively, the endoscope has a suction valve 600, the sheath 500 has a suction channel, and the suction channel is connected to the suction valve 600.

[0060] For example, an interface is provided on the endoscope, and the suction channel of the sheath 500 can be connected to the suction valve 600 on the endoscope through the interface, so that the operator can operate the endoscope with one hand during the operation, simplifying the instrument operation during the operation. At the same time, by pressing the travel switch of the suction valve 600 on the endoscope, the suction flow of the suction valve 600 during the operation can be adaptively changed, thereby realizing pulses, making the flow adjustment during the operation simpler.

[0061] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure balancing structure, applied to a handle portion (100) of an endoscope, wherein the distal end of the handle portion (100) is connected to an insertion portion (200), and an instrument channel (210) communicating with the handle portion (100) is provided through the insertion portion (200), characterized in that: The pressure balance structure comprises: a connecting piece (300) having a communication cavity (310), an instrument inlet (320) and a liquid injection port (330); the connecting piece (300) is mounted on the handle portion (100); the instrument inlet (320) and the liquid injection port (330) are both connected to the instrument channel (210) via the communication cavity (310); An adjusting member (400) is mounted on the connecting member (300), and the adjusting member (400) can adaptively adjust the volume of the connecting cavity (310) when the pressure in the instrument channel (210) changes, wherein: When the pressure in the instrument channel (210) gradually increases, the regulating member (400) correspondingly gradually increases the volume of the communication cavity (310); when the pressure in the instrument channel (210) gradually decreases, the regulating member (400) correspondingly gradually decreases the volume of the communication cavity (310); The adjusting member (400) comprises a partition portion (410), the partition portion (410) being movably disposed in the communicating cavity (310), the partition portion (410) dividing the communicating cavity (310) into a first cavity (311) and a second cavity (312) which are isolated from each other, and the second cavity (312) is in communication with the instrument channel (210); The adjusting member (400) further comprises a moving portion (420), wherein the moving portion (420) is movably disposed in the second cavity (312); The partition part (410) is slidably sealed in the communicating cavity (310); the movable part (420) is connected to the partition part (410) and slidably disposed in the second cavity (312); the movable part (420) is provided with an adjustment port (421); and the second cavity (312) is axially connected to the instrument channel (210) through the adjustment port (421); When the partition portion (410) approaches the first cavity (311), the regulating port (421) and the inlet end of the instrument channel (210) are gradually misaligned in the axial direction; when the partition portion (410) approaches the second cavity (312), the regulating port (421) and the inlet end of the instrument channel (210) are gradually aligned in the axial direction.

2. The pressure balancing structure according to claim 1, characterized in that: The regulating member (400) further comprises a limiting portion (430), and when the pressure in the instrument channel (210) gradually increases, the limiting portion (430) can cooperate with the partition portion (410) to limit position in the communicating cavity (310); The limiting portion (430) is adjustably disposed on the connecting member (300) to adjust the matching position of the limiting portion (430) and the partition portion (410) in the connecting cavity (310).

3. The pressure balancing structure according to claim 1, characterized in that: The regulating member (400) further comprises an elastic portion (440), wherein the elastic portion (440) is telescopically disposed in the communicating cavity (310) and is connected to the partition portion (410); when the elastic portion (440) is in a natural state, the regulating port (421) is axially aligned with the inlet end of the instrument channel (210).

4. The pressure balancing structure according to any one of claims 1 to 3, characterized in that: The connecting piece (300) further has a vent (340), and the first cavity (311) is connected to the outside through the vent (340).

5. The pressure balancing structure according to claim 4, characterized in that: The vent (340) is covered with an elastic diaphragm (341), and the elastic diaphragm (341) can be deformed under the action of an external force.

6. An endoscope, characterized in that: It comprises a handle portion (100), an insertion portion (200) and the pressure balancing structure according to any one of claims 1 to 5, wherein the insertion portion (200) is connected to the distal end of the handle portion (100), and the pressure balancing structure is detachably mounted on the instrument port of the handle portion (100); The front end of the insertion portion (200) is provided with a pressure sensor; and / or the communicating cavity (310) and / or the instrument channel (210) are provided with a pressure sensor.

7. An implantation system, characterized in that: An endoscope comprising a sheath tube (500) and the endoscope according to claim 6, wherein the endoscope has a suction valve (600), the sheath tube (500) has a suction channel, and the suction channel is connected to the suction valve (600).

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