CN107224626A

CN107224626A - A kind of device for casting and application thereof

Info

Publication number: CN107224626A
Application number: CN201710350952.XA
Authority: CN
Inventors: 王磊; 崔心刚; 干思舜; 储传敏; 叶剑青; 曲发军; 杨炜; 田毅君; 潘秀武; 张向民
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-17
Filing date: 2017-05-17
Publication date: 2017-10-03
Anticipated expiration: 2037-05-17
Also published as: CN107224626B

Abstract

The embodiment of the present application provides a kind of device for casting and application thereof, and for importing a fluid from a fluid provider and being discharged via a fluid drain member, the device includes an accommodating body, and its inside has the accommodating cavity for being used for containing fluid；One plunger assembly, in the accommodating cavity, and can be moved axially inside the accommodating body；One drive component, it connects the plunger assembly, for driving the plunger assembly in axial movement in the accommodating cavity；And the guiding subassembly being respectively communicated with the local interface and remote interface of the fluid provider, the fluid drain member and the accommodating cavity.The device for casting of the application drives the plunger assembly to be moved back and forth in the accommodating cavity by the drive component, so as to realize fluid be continuously introduced into without interruption and with discharge, it is ensured that the continuity of fluid perfusion.

Description

Perfusion device and application thereof

Technical Field

The application relates to the technical field of medical instruments, in particular to a perfusion device and application thereof.

Background

With the development of endoscope technology, endoscopic surgery, such as ureteroscopy, hysteroscope, etc., has emerged in succession and has become the main surgical mode for treating related diseases. In endoscopic surgery, a perfusion device is connected with an endoscope to continuously perfuse liquid into a natural cavity. The cavity is filled with the following components: 1. the cavity channel is expanded, so that the endoscope is convenient to enter and operate; 2. wash away blood, exfoliated tissues and broken stones in the operation area to ensure the clear operation field.

In the operation process of the endoscopic surgery, the perfusion continuity is guaranteed to be crucial, and the operation field blurring and further operation interruption or operation complications caused by discontinuous perfusion are avoided. In addition, different perfusion flows are provided according to different operation purposes, for example, a larger perfusion flow is needed to expand a cavity in the process of endoscopic entry to the cavity, and the lithotripsy process only needs the perfusion flow to ensure that a surgical field is clearer, so that the displacement of calculus is avoided; if different operation equipment such as lithotripsy and lithotomy equipment is arranged in the endoscope, the perfusion channel is reduced, and the perfusion flow is increased to ensure the clear operative field.

Therefore, there is a need for an infusion device that provides continuous, uninterrupted infusion, ensures surgical safety and continuity, and provides a controlled volume of infusion.

Disclosure of Invention

In view of the above, the present application provides an irrigation device and its use, overcoming the above problems or at least partially solving the above problems.

An embodiment of the present application provides a perfusion apparatus, which is respectively connected to a fluid provider and a fluid discharge member, and is configured to introduce a fluid from the fluid provider and discharge the fluid through the fluid discharge member, wherein the perfusion apparatus includes:

the accommodating body is internally provided with an accommodating cavity for accommodating fluid, and a near end interface and a far end interface which are communicated with the accommodating cavity are respectively arranged at the near end and the far end of the accommodating body;

the plunger assembly is arranged in the accommodating cavity;

the driving assembly is connected with the plunger assembly and is used for driving the plunger assembly to axially move in the accommodating cavity (111); and

a flow directing assembly, comprising:

a first flow guide part which is respectively communicated with the fluid provider, the proximal end interface of the accommodating cavity and the fluid discharge part;

a second flow guide part which is respectively communicated with the fluid provider, the far end interface of the containing cavity and the fluid discharge part; wherein,

when the driving assembly drives the plunger assembly to move from the proximal end to the distal end of the accommodating cavity, the first flow guide piece guides the fluid from the fluid provider and guides the fluid into the accommodating cavity through the proximal port, and meanwhile, the second flow guide piece receives the fluid guided out of the accommodating cavity through the distal port and discharges the fluid through the fluid discharge piece; when the driving assembly drives the plunger assembly to move from the far end to the near end of the containing cavity, the second flow guide piece guides the fluid from the fluid provider and guides the fluid into the containing cavity through the far end interface, and meanwhile, the first flow guide piece receives the fluid guided out of the containing cavity through the near end interface and discharges the fluid through the fluid discharge piece.

Optionally, the first fluid guiding element further has a first port, a second port and a first outlet port to communicate with the fluid provider through the first port, communicate with the proximal port of the accommodating chamber through the second port, and communicate with the fluid discharging element through the first outlet port, and the second fluid guiding element further has a third port, a fourth port and a second outlet port to communicate with the fluid provider through the third port, communicate with the distal port of the accommodating chamber through the fourth port, and communicate with the fluid discharging element through the second outlet port.

Optionally, the first interface, the first discharge port, the third interface, and the second discharge port are in a one-way valve structure.

Optionally, the plunger assembly further includes a reciprocating piston and a connecting rod connected to the reciprocating piston, an outer edge of the reciprocating piston is closely attached to an inner edge wall of the accommodating cavity to form a first vacuum chamber and a second vacuum chamber inside the accommodating cavity, and internal volumes of the first vacuum chamber and the second vacuum chamber can be relatively enlarged or reduced along with axial movement of the connecting rod driving the reciprocating piston in the accommodating cavity.

Optionally, the housing (11,21) is of tubular column type.

Optionally, the proximal end of the housing (11,21) further has a proximal sidewall that is at least partially detachable.

Optionally, an elastic member is further disposed on the link (134, 234) of the driving member (15,25), the elastic member is compressed by pushing the link (134, 234) and drives the plunger member (13, 23) to move from the proximal end to the distal end of the accommodating body (11,21), and the plunger member (13, 23) is automatically driven to move from the distal end to the proximal end of the accommodating body (11,21) by releasing the link (134, 234) due to the resilient force provided by the elastic member.

Preferably, the elastic member is a tapered spiral structure, and the elastic member is arranged between the proximal end of the driving assembly (15,25) and the proximal outer side wall of the accommodating body (11, 21).

Preferably, the end with the smallest diameter of the elastic element is arranged at the proximal end of the driving component (15,25), and the end with the largest diameter of the elastic element is arranged at the proximal outer side wall of the accommodating body (11, 21).

Correspondingly, the embodiment of the application also provides a use of the perfusion device for perfusion of fluid in endoscopic surgery.

The embodiment of the application also provides a use of the perfusion device for perfusion of fluid in the intracorporeal lithotripsy.

An embodiment of the present invention further provides a perfusion apparatus, which is respectively connected to a fluid provider and a fluid discharge member, and is used for introducing a fluid from the fluid provider and discharging the fluid through the fluid discharge member, wherein the perfusion apparatus includes:

the liquid storage device comprises a containing body, a first liquid storage tank, a second liquid storage tank and a liquid outlet pipe, wherein the containing body is internally provided with a first containing cavity and a second containing cavity for containing fluid, and is also provided with a fifth interface communicated with the first containing cavity and a sixth interface communicated with the second containing cavity;

the plunger assembly comprises a third piston, a fourth piston and a connecting rod for connecting the third piston and the fourth piston, the third piston is arranged in the first accommodating cavity, and the fourth piston is arranged in the second accommodating cavity;

the driving assembly is connected with the connecting rod and drives the connecting rod to enable the third piston and the fourth piston to synchronously and axially move in the first accommodating cavity and the second accommodating cavity respectively;

a flow directing assembly, comprising:

the first flow guide piece is respectively communicated with the fluid provider, the fifth interface of the containing body and the fluid discharge piece;

the second flow guide piece is respectively communicated with the fluid provider, the sixth interface of the accommodating body and the fluid discharge piece; wherein,

when the driving assembly drives the connecting rod to enable the third piston and the fourth piston to move axially in the first accommodating cavity and the second accommodating cavity synchronously in a first motion state, the first flow guide piece receives the fluid guided out of the first accommodating cavity through the fifth interface and discharges the fluid through the fluid discharge piece, and meanwhile, the second flow guide piece guides the fluid from the fluid provider and guides the fluid into the second accommodating cavity through the sixth interface; when the driving assembly drives the connecting rod to enable the third piston and the fourth piston to move axially in the first accommodating cavity and the second accommodating cavity synchronously in a second motion state, the first flow guide piece guides the fluid from the fluid supplier, guides the fluid into the first accommodating cavity through the fifth interface, and meanwhile, the second flow guide piece receives the fluid guided out of the second accommodating cavity through the sixth interface and discharges the fluid through the fluid discharge piece.

Optionally, the accommodating body further has a proximal end adjacent to the driving assembly and a distal end opposite to the proximal end, and the first accommodating cavity is adjacent to the proximal end of the accommodating body and the second accommodating cavity is adjacent to the distal end of the accommodating body.

Optionally, the fifth port is communicated with a side of the first receiving cavity adjacent to the proximal end of the receiving body, the sixth port is communicated with a side of the second receiving cavity adjacent to the distal end of the receiving body, the first motion state is that the third piston and the fourth piston axially move from the distal end to the proximal end, and the second motion state is that the third piston and the fourth piston axially move from the proximal end to the distal end.

Optionally, the fifth port is communicated with a side of the first receiving cavity far away from the proximal end of the receiving body, the sixth port is communicated with a side of the second receiving cavity far away from the distal end of the receiving body, the first motion state is that the third piston and the fourth piston axially move from the proximal end to the distal end, and the second motion state is that the third piston and the fourth piston axially move from the distal end to the proximal end.

Optionally, a sealing element is further disposed between the first accommodating chamber and the second accommodating chamber for isolating the first accommodating chamber from the second accommodating chamber.

Optionally, the accommodating body is further provided with a first air vent, and the first air vent is adjacent to the sealing element and communicated with the second accommodating cavity.

Optionally, a third vent hole is further disposed in the first accommodating cavity, and a fourth vent hole is further disposed in the second accommodating cavity, wherein the third vent hole and the fifth port are respectively disposed at two sides of the first accommodating cavity opposite to the third piston, and the fourth vent hole and the sixth port are disposed at two sides of the second accommodating cavity opposite to the fourth piston.

Optionally, a sealing element separates the first receiving cavity (211) and the second receiving cavity (212) into two chambers with the same volume, and the sealing element is disposed between the third piston and the fourth piston.

Optionally, the first fluid guiding element further has a first port, a second port, and a first outlet port to communicate with the fluid provider through the first port, communicate with the fifth port of the first receiving chamber through the second port, and communicate with the fluid discharging element through the first outlet port, and the second fluid guiding element further has a third port, a fourth port, and a second outlet port to communicate with the fluid provider through the third port, communicate with the sixth port of the second receiving chamber through the fourth port, and communicate with the fluid discharging element through the second outlet port.

Optionally, the receptacle is of the tubular column type.

Optionally, the proximal end of the housing further has a proximal sidewall that is at least partially detachable.

Optionally, an elastic member is further disposed on the connecting rod of the driving assembly, the elastic member compresses by pushing the connecting rod and drives the plunger assembly to move from the proximal end to the distal end of the accommodating body, and the plunger assembly is automatically driven to move from the distal end to the proximal end of the accommodating body by releasing the connecting rod and utilizing the resilience force provided by the elastic member.

In another aspect, the present application further provides a use of the perfusion device for perfusion of fluid in endoscopic surgery.

In yet another aspect, the present application also provides a use of the perfusion device described above for perfusion of fluid in intracorporeal lithotripsy.

As can be seen from the above technical solutions, the advantages of the present invention over the prior art include:

1. in the prior art, in the process of perfusion by using a common syringe, after a user completely pushes fluid in the syringe into an endoscope or a human body cavity, the user needs to replace another syringe filled with the fluid or draw out the current syringe, extract the fluid from a fluid container, and then inject the fluid in the syringe into the endoscope or the human body cavity, and the perfusion is interrupted when replacing the syringe or drawing the fluid again from the syringe, so that the operation is influenced, the accuracy of the operation is further influenced, the operation time is prolonged, and even the operation risk is brought.

The syringe is improved into a closed structure, and the closed structure is respectively communicated with the first flow guide assembly and the second flow guide assembly through the near-end interface and the far-end interface of the accommodating cavity, so that when the plunger assembly reciprocates in the closed structure, the first flow guide assembly and/or the second flow guide assembly continuously discharge the fluid out of the closed structure, namely, the fluid can be continuously introduced and discharged without interruption regardless of pushing the plunger assembly to move towards the far end of the accommodating cavity or pulling the plunger assembly to move towards the near end of the closed container, and the fluid can be continuously poured into the endoscope or the human body cavity channel. When a user pushes and pulls the plunger manually, the pressure in the human body cavity can be sensed, the flow of the fluid can be adjusted at any time, and the controllability and the accuracy of perfusion are realized.

2. This application makes the fluid continuously get into and flow out the holding body through selectively opening and closing different valves through being equipped with one-way valve respectively at first interface, first discharge port, third interface and the second discharge port of first water conservancy diversion subassembly and second water conservancy diversion subassembly. In addition, according to the fluid discharging device, the plunger assembly is moved in one space by adopting one piston and one cylinder in the accommodating body, or two pistons are adopted, the accommodating body is separated into two spaces through the sealing element, and the fluid can be continuously discharged out of the closed structure by pushing and pulling the plunger assembly.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a perspective view of a first embodiment of an irrigation device of the present application;

FIG. 2 is a cross-sectional view of a first embodiment of an irrigation device of the present application;

FIG. 3 is a top view of a first embodiment of an irrigation device of the present application;

FIG. 4 is a perspective view of an embodiment of a first baffle member and a second baffle member of the present application;

FIG. 5 is a schematic view of an embodiment of the plunger assembly of FIG. 1 as it moves proximally from the distal end of the receptacle;

FIG. 6 is a cross-sectional view of one embodiment of the one-way valve of the present application;

FIG. 7 is a side view of one embodiment of the one-way flap of FIG. 6 taken along A-A;

FIG. 8 is a perspective view of a second embodiment of an irrigation device of the present application;

FIG. 9 is a schematic view of a second embodiment of an irrigation device of the present application;

FIG. 10 is a schematic view of an embodiment of the plunger assembly of FIG. 9 as it moves proximally from the distal end of the receptacle;

FIG. 11 is a schematic view of a third embodiment of an irrigation device of the present application;

FIG. 12 is a schematic view of an embodiment of the plunger assembly of FIG. 11 as it moves proximally from the distal end of the receptacle;

FIG. 13 is a schematic view of an embodiment of a resilient member of an infusion device of the present application.

Element number

1,2 perfusion device 1723, 2722 second outlet

3 fluid provider 131 reciprocating piston

4 fluid discharge 114 first chamber

11,21 housing 115 second chamber

13, 23 plunger assembly 134, 234 linkage

15,25 drive assembly 215 first exhaust vent

17, 27 deflector assembly 210 seal element

171, 271 first deflector 211 first receiving chamber

172, 272 second flow guide part 212 second receiving cavity

111 accommodating chamber 231 third piston

112 proximal port 232 fourth piston

113 remote interface 213 fifth interface

1711, 2711 first interface 214 sixth interface

1712, 2712 the third vent of the second port 216

1713, 2713A fourth exhaust opening 217

1721, 2721 third interface 18, 28 spring

1722, 2722 fourth port 41 fluid outlet

31 fluid inlet 42,43 connection

32,33 flow guide tube 174 one-way valve structure

1741 hemispherical valve 1742 cross structure

Detailed Description

At present, the commonly used intraluminal perfusion methods in surgical clinic take urology as an example, and there are two main methods:

the perfusion pump adopts an automatic control technology, controls the perfusion pressure through a pressure sensor, and can set or display the perfusion flow, the upper pressure limit in the perfusion pipeline and the actual pressure in the perfusion pipeline on a panel. Its advantage is automatic perfusion, but the shortcoming is that the perfusion volume is great, can't be in the art according to concrete operation and the operation field condition in time fine adjustment perfusion flow, and the operation complication is more.

Hand-push syringe perfusion is frequently complicated after the perfusion operation by using an endoscope perfusion pump, and many clinical centers adopt a hand-push syringe perfusion method, namely, a syringe is connected with an endoscope, and an assistant in the operation cooperates with a doctor in the operation to push the syringe for perfusion. The device has the advantages of good controllability, fine and timely adjustment of perfusion flow according to the surgical field and specific operation, and the perception of perfusion pressure through syringe perfusion, and avoidance of overhigh pressure of an inner cavity, and the defects that continuous water injection cannot be realized due to repeated water suction of the syringe, another syringe filled with fluid needs to be frequently replaced in the perfusion process, or the current syringe is drawn out, the fluid is extracted from a fluid container, the fluid in the syringe is injected into the endoscope or the human body cavity channel, the perfusion is interrupted due to replacement of the syringe or re-drawing of the fluid by the syringe, the operation is affected, the accuracy of the operation is affected, the operation time is prolonged, and even the operation risk is caused.

The injector is improved to be a closed structure, and the closed structure is communicated with the fluid communication device through at least two interfaces, so that the fluid communication device continuously discharges fluid out of the closed structure when the plunger reciprocates in the closed structure, and continuous filling and filling controllability of the fluid are achieved simultaneously.

Of course, implementing any aspect of the embodiments of the present application does not necessarily require achieving all of the above advantages at the same time.

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

Term(s) for

The "pod" need not be completely sealed, e.g., the proximal sidewall of the pod may have a through-hole through the plunger assembly, with the plunger and the proximal sidewall of the container forming an integral seal. The proximal and distal ends of the container are in turn provided with ports for selective fluid flow into and out of the container, respectively. Optionally, the proximal side wall of the receptacle may also be at least partially detachable.

The "fluid" includes both liquids and gases, and liquids include, but are not limited to, water, saline, medical fluids, and the like.

The proximal end of the accommodating cavity and the proximal end of the accommodating body refer to one end of the accommodating cavity or the accommodating body close to the driving component; conversely, the term "distal end of the accommodating cavity" and "distal end of the accommodating body" refer to the end of the accommodating cavity and the end of the accommodating body away from the driving assembly.

The proximal end of the connecting rod and the proximal end of the driving component refer to one end of the connecting rod or the driving component close to an external force action point (such as hand pushing or hand pulling); conversely, "distal end of the linkage" and "distal end of the drive assembly" refer to the end of the linkage or drive assembly that is distal from the point of application of an external force (e.g., hand pushing or hand pulling).

The following further describes specific implementations of embodiments of the present application with reference to the drawings of the embodiments of the present application.

Referring to fig. 1-3, in one embodiment of the present application, the fluid perfusion apparatus (1) is connected to a fluid provider (3) and a fluid discharge member (4), respectively, for introducing a fluid from the fluid provider (3) and discharging the fluid through the fluid discharge member (4), as shown in the figure, the perfusion apparatus (1) comprises:

the container comprises a container body (11), a container cavity (111) for containing fluid is arranged in the container body (11), and a near end interface (112) and a far end interface (113) which are communicated with the container cavity (111) are respectively arranged at the near end and the far end of the container body (11).

A plunger assembly (13) disposed in the receiving cavity (111).

And the driving component (15) is connected with the plunger component (13) and is used for driving the plunger component (13) to axially move in the accommodating cavity (111).

A flow guide assembly (17) comprising a first flow guide member (171) and a second flow guide member (173), the first flow guide member (171) being respectively communicated with the fluid supplier (3), the proximal port (112) of the accommodating cavity and the fluid discharge member (4); the second flow guiding element (172) is respectively communicated with the fluid provider (3), the far end interface (113) of the accommodating cavity and the fluid discharging element (4). Specifically, the first diversion element (171) further has a first interface (1711), a second interface (1712), and a first outlet (1713) to communicate with the fluid provider (3) through the first interface (1711), communicate with the proximal interface (112) of the accommodating chamber (111) through the second interface (1712), and communicate with the fluid outlet (4) through the first outlet (1713), the second diversion element (172) further has a third interface (1721), a fourth interface (1722), and a second outlet (1723) to communicate with the fluid provider (3) through the third interface (1721), communicate with the distal interface (113) of the accommodating chamber (111) through the fourth interface (1722), and communicate with the fluid outlet (4) through the second outlet (1723).

Preferably, the first port (1711), the first outlet (1713), the third port (1721) and the second outlet (1723) are of a one-way valve structure, but not limited thereto, and they may also be of a one-way valve structure design.

As shown in fig. 6 and 7, in an embodiment of the present application, the one-way valve structure (174) includes a hemispherical valve (1741), the thickness of the edge of the largest diameter of the hemispherical valve (1741) is slightly larger than the thickness of other portions, the edge of the largest diameter of the hemispherical valve (1741) is tightly attached to the wall of the first port (1711), the first outlet (1713), the third port (1721) or the second outlet (1723), the highest protruding point of the hemispherical valve (1741) is fixed to a cross-shaped structure (1742), and the cross-shaped structure (1742) is fixed to the wall of the first port (1711), the first outlet (1713), the third port (1721) or the second outlet (1723) or is integrally formed with the wall.

When fluid flows from the convex direction of the hemispherical valve (1741) to the concave direction, the hemispherical valve (1741) is flushed away and gathered along the axial direction by abutting the 8FB9 edge of the tube wall, and the fluid passes through. When fluid flows from the concave direction to the convex direction of the hemispherical valve (1741), the concave hemispherical valve (1741) partially blocks the passage of the fluid. Thereby achieving unidirectional fluid flow.

In addition, the second port (1712) and the fourth port (1722) can be two-way valves, and fluid can flow through the valves from both the front and the back.

As shown in fig. 4, the first flow guiding element (171) and the second flow guiding element (172) may be a three-way pipe structure, and in an embodiment of the present application, a pipeline of the first port (1711) of the first flow guiding element (171) communicating with the second port (1712) communicates with the first outlet (1713), so as to form a three-way pipe structure; a pipeline for communicating the third interface (1721) and the fourth interface (1722) of the second flow guide piece (172) is communicated with the second discharge port (1723) to form a three-way pipe structure. At this time, preferably, the first port (1711) is farther from the accommodating chamber (11) relative to the first discharge port (1713), and the third port (1721) is farther from the accommodating chamber (11) relative to the second discharge port (1723). The design can realize that the fluid enters the accommodating cavity (11) through the one-way valve of the first interface (1711), and when the fluid is led out from the accommodating cavity (11) through the first interface (1711), the fluid only flows out through the one-way valve of the first discharge port (1713), and the one-way valve of the first interface (1711) keeps a closed state. The third port (1721) and the second outlet (1723) are identical in principle.

When the driving assembly (15) drives the plunger assembly (13) to move from the proximal end to the distal end of the accommodating cavity (111), the first flow guide (171) guides the fluid from the fluid provider (3) and guides the fluid into the accommodating cavity (11) through the proximal port (112), and meanwhile, the second flow guide (172) receives the fluid guided out of the accommodating cavity (11) through the distal port (113) and discharges the fluid through the fluid discharge member (4); when the driving assembly (15) drives the plunger assembly (13) to move from the far end to the near end of the accommodating cavity (111), the second flow guide element (172) guides the fluid from the fluid provider (3) and guides the fluid into the accommodating cavity (111) through the far end interface (113), and meanwhile, the first flow guide element (171) receives the fluid guided out of the accommodating cavity (11) through the near end interface (112) and discharges the fluid through the fluid discharge element (4).

Optionally, the plunger assembly (13) may include a reciprocating piston (131) and a connecting rod (134) connected to the reciprocating piston (131), an outer edge of the reciprocating piston (131) is closely attached to an inner edge wall of the accommodating cavity (111) to form a first chamber (114) and a second chamber (115) of vacuum inside the accommodating cavity (111), and internal volumes of the first chamber (114) and the second chamber (115) may be relatively enlarged or reduced along with axial movement of the connecting rod (134) driving the reciprocating piston (131) in the accommodating cavity (111). When the internal volume of the first chamber (114) or the second chamber (115) is expanded, a negative pressure is formed inside the first chamber (114) or the second chamber (115), and the fluid can be sucked into the first chamber (114) or the second chamber (115) through the proximal port (112) or the distal port (113); conversely, when the internal volume of the first chamber (114) or the second chamber (115) is reduced, a positive pressure is formed inside the first chamber (114) or the second chamber (115), and the fluid contained in the first chamber (114) or the second chamber (115) can be discharged through the proximal port (112) or the distal port (113).

Optionally, the outer edge of the reciprocating piston (131) has a sealing ring (not shown), and the sealing ring is sleeved on the outer edge of the reciprocating piston and tightly attached to the inner edge tube wall of the accommodating cavity (111).

Alternatively, the link (134) may be a conventional wire, and may further include at least three blades extending in the radial and axial directions of the cylinder.

It should be noted that the above is only an example of the material and shape of the pillar, and the material and shape of the pillar are not limited.

One end of the link (134) of the drive assembly (15) may also be provided with a gripping portion for gripping by an operator, such as a pull tab or other mechanism. In use, the piston may be actuated by pushing or pulling the actuating member (15) by external force (e.g. human hand force).

The fluid provider (3) may be shaped and configured as shown in fig. 1, and is provided with a fluid inlet (31), and the fluid inlet (31) may be externally connected with a fluid container (water bag, liquid medicine bag). Preferably, the fluid provider (3) may be provided with two fluid guiding pipes (32,33) for connecting the first port (1711) of the first fluid guiding element (171) and the third port (1721) of the second fluid guiding element (172), respectively.

The fluid discharging member (4) may be a straight pipe structure as shown in fig. 1, and is provided with a fluid outlet (41) and two ports (42,43), and the two ports (42,43) are respectively connected with the first outlet (1713) and the second outlet (1723), but not limited thereto, and the fluid discharging member (4) may also be a curved structure (not shown). The fluid discharge member (4) may be connected to an endoscopic system, such as a ureteroscope. The distal end interface (113) can be arranged at any suitable position of the distal end of the accommodating body (11), for example, the axis of the distal end interface (113) is perpendicular to the axis of the accommodating body (11) or parallel to the axis of the accommodating body (11).

The housing (11) may be a tubular column, but is not limited thereto, and other shapes such as a square may be applied.

The container (11) may be integrally molded, for example, by blow molding or other methods, and the material of the container (11) may be a medical material, such as medical plastic (including polymer material), glass, etc. Alternatively, the proximal end of the housing (11) may also have a proximal sidewall that is at least partially removable. The proximal sidewall of the container (11) is close to the plunger assembly (13) for the connecting rod (134) of the plunger assembly (13) to connect and pass through to connect the reciprocating piston (131) or the first piston (132) and the second piston (133), the diameter of the proximal sidewall may be the same as or larger than the maximum diameter of the plunger assembly (13), and may be partially or wholly unloaded or mounted to the container (11) to seal the proximal end of the container (11), while also sealing a portion of the plunger assembly (13) into the container (11). The purpose of this design is to facilitate the insertion and removal of the plunger assembly (13) into and from the receptacle (11). In addition, when the accommodating body (11) and the plunger assembly (13) cannot be formed at one time in the manufacturing process, the accommodating body (11) and the plunger assembly (13) can be manufactured separately and then installed into an integral structure. The material of the proximal sidewall is not limited and may be plastic, rubber, or other material.

Optionally, the housing (11) is of the tubular column type or other suitable shape.

The filling device of the present application can be operated with one hand, i.e. with one hand pushing or pulling the drive assembly, to achieve a continuous outflow of fluid from the fluid discharge member 4.

As shown in fig. 1 and 2, the driving assembly may be a pull ring for receiving at least one finger, and two pull rings having similar diameters may be provided on the proximal outer sidewall of the receiving body for facilitating pushing or pulling with one hand.

As shown in fig. 13, an elastic member (2) is further disposed on the connecting rod (134) of the driving assembly (15)18) By pushing the link (134) to compress the elastic member (18) and simultaneously drive the plunger assembly (13) to move from the proximal end to the distal end of the housing (11), and by releasing the link (1)34) So as to automatically drive the plunger assembly (13) to move from the far end to the near end of the accommodating body (11) by the resilience provided by the elastic piece (18).

Preferably, the elastic member(s) ((18) A conical spiral structure, the elastic member(s) ((18) Is arranged between the proximal end of the driving component (15) and the proximal outer side wall of the accommodating body (11).

Preferably, the elastic member(s) ((18) The end with the smallest diameter is arranged at the proximal end of the driving component (15), and the elastic component(s) ((18) The end with the largest diameter is arranged on the outer side wall of the near end of the accommodating body (11).

The working principle of the fluid perfusion device is as follows:

in the initial state, the distal end of the plunger assembly (13) may be located at the proximal or distal end of the receptacle (11). When the far end of the plunger assembly (13) is located at the near end of the accommodating body (11), the plunger assembly (13) discharges the air in the accommodating cavity (111) through the far-end interface (113) and the second discharge port (1723) under the action of external force, meanwhile, the one-way valve at the first interface (1711) is opened, and the fluid enters the accommodating cavity (111) through the first interface (1711), the second interface (1712) and the near-end interface (112). When the far end of the plunger assembly (13) is located at the far end of the accommodating body (11), the plunger assembly (13) discharges air in the accommodating cavity (111) through the near end interface (112) and the first discharge port (1713) under the action of external force, meanwhile, the one-way valve at the third interface (1721) is opened, and fluid enters the accommodating cavity (111) through the third interface (1721), the fourth interface (1722) and the far end interface (113).

Fig. 1 and 5 show views of an embodiment of the plunger assembly (13) in a rest state and in a state driven to move proximally from the distal end of the containment chamber (111), respectively.

When the driving assembly (15) drives the plunger assembly (13) to move from the far end to the near end of the accommodating cavity (111), the second flow guide element (172) guides the fluid from the fluid provider (3) into the first chamber (114) through the third interface (1721), the fourth interface (1722) and the far end interface (113), and synchronously, the first flow guide element (171) receives the fluid guided out of the second chamber (115) through the near end interface (112) and discharges the fluid through the second interface (1712) and the first discharge port (1713) and the fluid discharge element (4).

When the driving assembly (15) drives the plunger assembly (13) to move from the proximal end to the distal end of the accommodating cavity (111), the first guiding element (171) guides fluid from the fluid provider (3) into the second chamber (115) through the first interface (1711), the second interface (1712) and the proximal interface (112), and simultaneously, the second guiding element (172) receives the fluid guided out of the first chamber (114) through the distal interface (113), and then is discharged through the fluid discharge element (4) through the fourth interface (1722) and the second discharge port (1723).

In another specific implementation of the present application, a fluid perfusion apparatus (2) is provided, the perfusion apparatus (2) being respectively connected to a fluid provider (3) and a fluid discharge member (4) for introducing a fluid from the fluid provider (3) and discharging the fluid through the fluid discharge member (4), the perfusion apparatus (4) comprising:

the container comprises a container body (21), a first container cavity (211) and a second container cavity (212) which are used for containing fluid, a fifth interface (213) which is communicated with the first container cavity (211) and a sixth interface (214) which is communicated with the second container cavity (212) are arranged in the container body (21);

a plunger assembly (23) including a third piston (231) and a fourth piston (232) and a connecting rod (234) connecting the third piston (231) and the fourth piston (232), the third piston (231) being disposed in the first receiving chamber (211), the fourth piston (232) being disposed in the second receiving chamber (212);

a driving assembly (25) connected to the connecting rod (234) and driving the connecting rod (234) to move the third piston (231) and the fourth piston (232) synchronously and axially in the first accommodating cavity (211) and the second accommodating cavity (212), respectively;

a flow guide assembly (27) comprising a first flow guide member (271) and a second flow guide member (272), the first flow guide member (271) being respectively communicated with the fluid supplier (3), the fifth port (213) of the accommodating body (21) and the fluid discharge member (4); the second flow guiding element (272) is respectively communicated with the fluid provider (3), the sixth interface (214) of the accommodating body (21) and the fluid discharging element (4); in one embodiment, the first guiding element (271) further has a first port (2711), a second port (2712) and a first outlet port (2713) to communicate with the fluid provider (3) through the first port (2711), communicate with the fifth port (213) of the first receiving chamber (211) through the second port (2712), and communicate with the fluid outlet element (4) through the first outlet port (2713), the second guiding element (272) further has a third port (2721), a fourth port (2722) and a second outlet port (2723) to communicate with the fluid provider (3) through the third port (2721), communicate with the sixth port (214) of the second receiving chamber (212) through the fourth port (2722), and communicate with the fluid outlet element (4) through the second outlet port (2723).

When the driving assembly (25) drives the connecting rod (234) to move the third piston (231) and the fourth piston (232) axially in the first accommodating cavity (211) and the second accommodating cavity (212) synchronously in a first motion state, the first guiding member (271) receives the fluid guided out of the first accommodating cavity (211) through the fifth interface (213) and discharges the fluid through the fluid discharging member (4), and meanwhile, the second guiding member (272) guides the fluid from the fluid provider (3) and guides the fluid into the second accommodating cavity (212) through the sixth interface (214); when the driving assembly (25) drives the connecting rod (234) to move the third piston (231) and the fourth piston (232) axially in the first accommodating cavity (211) and the second accommodating cavity (212) synchronously in a second motion state, the first guiding member (271) guides the fluid from the fluid provider and guides the fluid into the first accommodating cavity (211) through the fifth interface (213), and meanwhile, the second guiding member (272) receives the fluid guided out of the second accommodating cavity (212) through the sixth interface (214) and discharges the fluid through the fluid discharging member (4).

Specifically, the accommodating body (21) further has a proximal end adjacent to the driving assembly (25) and a distal end opposite to the proximal end, the first accommodating cavity (211) is adjacent to the proximal end of the accommodating body (21), and the second accommodating cavity (212) is adjacent to the distal end of the accommodating body (21).

As shown in fig. 8-9, the fifth port (213) communicates with a side of the first receiving cavity (211) adjacent to the proximal end of the receiving body (21), the sixth port (214) communicates with a side of the second receiving cavity (212) adjacent to the distal end of the receiving body (21) (i.e. the fifth port (213) and the sixth port (214) are respectively disposed on two sides of the receiving body (21) similar to that shown in fig. 1), the first motion state is that the third piston (231) and the fourth piston (232) axially move from the distal end to the proximal end, and the second motion state is that the third piston (231) and the fourth piston (232) axially move from the proximal end to the distal end.

Preferably, the first port (2711), the first discharge port (2713), the third port (2721) and the second discharge port (2723) are of a one-way valve structure, and may also be of a one-way valve structure.

Preferably, a sealing element (210) is further disposed between the first receiving cavity (211) and the second receiving cavity (212) for isolating the first receiving cavity (211) from the second receiving cavity (212). Preferably, the sealing element (210) separates the first receiving cavity (211) and the second receiving cavity (212) into two chambers with the same volume.

Preferably, the housing (21) is further provided with a first vent hole (215), and the first vent hole (215) is adjacent to the sealing element (210) and communicated with the second housing cavity (212).

The first air exhaust hole (215) is provided with a one-way valve, and the first air exhaust hole (215) is in a closed state after being used for exhausting air in the first accommodating cavity (211) or the second accommodating cavity (212).

Preferably, the portion of the sealing element (210) facing the fourth piston (232) has a gap, and the first venting hole (215) is located directly below the gap.

The operating principle of the perfusion device (21) is as follows:

in the initial state, the plunger assembly (23) is driven to axially reciprocate in the first accommodating cavity (211) and the first accommodating cavity (212), so that air in the first accommodating cavity (211) is exhausted through the fifth interface (213) and the first exhaust port (2713), and air in the second accommodating cavity (212) is exhausted through the first exhaust hole (215).

The first motion state is that the third piston (231) and the fourth piston (232) move axially from the distal end to the proximal end, and the second motion state is that the third piston (231) and the fourth piston (232) move axially from the proximal end to the distal end.

In operation, as shown in fig. 9-10, when the driving element (25) drives the plunger element (23) to move from the distal end to the proximal end of the receiving body (11), the second guiding element (272) receives the fluid provided by the fluid provider (3) through the third interface (2721), and guides the fluid into the second receiving cavity (212) through the fourth interface (2722) and the sixth interface (214); synchronously, the first flow guide element (271) receives the fluid guided out of the first receiving chamber (211) via the fifth port (213) and discharges the fluid via the fluid discharge element (4) via the second port (2712) and the first discharge port (2713).

When the plunger assembly (23) moves axially from the proximal end to the distal end of the accommodating body (11), the first flow guide element (271) receives the fluid provided by the fluid provider (3) through the first interface (2711) and guides the fluid into the first accommodating cavity (211) through the second interface (2712) and the fifth interface (213); synchronously, the second flow guiding element (272) receives the fluid guided out of the second receiving cavity (212) through the sixth port (214), and discharges the fluid through the fourth port (2722) and the second discharge port (2723) and through the fluid discharge element (4).

In the embodiment, a structure of two pistons is adopted, when the driving assembly (25) drives the plunger assembly (23) to move from the far end to the near end of the accommodating body (21), the second accommodating cavity (212) is in a vacuum state, and due to a negative pressure effect, fluid can be automatically guided into the second accommodating cavity (212) through the second flow guide piece (272), so that the driving assembly (25) is pushed to move towards the near end of the accommodating body (21), and at the moment, a user does not need to exert force or only needs to exert a small external force to realize the guiding-in of the fluid into the second accommodating cavity (212) and the guiding-out of the fluid from the first accommodating cavity (211). Meanwhile, the fluid in the first accommodating cavity (211) is gradually discharged until the fluid is emptied, after the fluid is emptied, vacuum is formed in the first accommodating cavity (211), the fluid can be automatically guided into the first accommodating cavity (211) through the first flow guide piece (271), so that the driving assembly (25) is pushed to axially move from the proximal end to the distal end of the accommodating body (21), and a user can realize the introduction of the fluid into the first accommodating cavity (211) and the discharge of the fluid from the second accommodating cavity (212) without exerting force or applying little external force.

Fig. 11 and 12 show another embodiment, in which the fifth port (213) communicates with a side of the first receiving cavity (211) far from the proximal end of the receiving body (21), the sixth port (214) communicates with a side of the second receiving cavity (212) far from the distal end of the receiving body (21) (as shown in fig. 8 and 9, that is, the fifth port (213) and the sixth port (214) are respectively disposed at a middle portion of the receiving body 21), the first motion state is that the third piston (231) and the fourth piston (232) axially move from the distal end to the proximal end, and the second motion state is that the third piston (231) and the fourth piston (232) axially move from the proximal end to the distal end.

Preferably, a third exhaust hole (216) is further disposed in the first receiving cavity (211) and/or a fourth exhaust hole (217) is further disposed in the second receiving cavity (212), wherein the third exhaust hole (216) and the fifth port (213) are respectively disposed at two sides of the first receiving cavity (211) corresponding to the third piston (231), and the fourth exhaust hole (217) and the sixth port (214) are disposed at two sides of the second receiving cavity (212) corresponding to the fourth piston (232). To assist in venting air from the second housing cavity (219) and the first housing cavity (218).

The third exhaust hole (216) and the fourth exhaust hole (217) are respectively provided with a one-way valve, and the third exhaust hole (216) and the fourth exhaust hole (217) are in a closed state after being used for exhausting air in the first accommodating cavity (211) and the second accommodating cavity (212).

Optionally, a sealing element (210) is further disposed between the first receiving cavity (211) and the second receiving cavity (212) for isolating the first receiving cavity (211) from the second receiving cavity (212).

Optionally, the sealing element (210) separates the first receiving cavity (211) and the second receiving cavity (212) into two chambers with the same volume, and the sealing element (210) is disposed between the third piston (231) and the fourth piston (232).

The working principle of the perfusion device (21) will be described below by taking the design structure of the perfusion device (21) of the embodiment shown in fig. 11 and 12 as an example (i.e. the fifth interface (213) communicates with the side of the first receiving cavity (211) far away from the proximal end of the receiving body (21), and the sixth interface (214) communicates with the side of the second receiving cavity (212) far away from the distal end of the receiving body (21)):

in an initial state, the plunger assembly (23) is driven to axially reciprocate in the first accommodating cavity (211) and the first accommodating cavity (212), so that air in the first accommodating cavity (211) is exhausted through the fifth interface (213) and the first exhaust port (2713) or through the third exhaust hole (216), and air in the second accommodating cavity (212) is exhausted through the sixth interface (214) and the second exhaust port (2723) or through the fourth exhaust hole (217).

In operation, when the driving assembly (25) drives the plunger assembly (23) to move from the distal end to the proximal end of the accommodating body (21), the second guiding member (272) receives the fluid provided by the fluid provider (3) through the third port (2721), and guides the fluid into the second accommodating cavity (212) through the fourth port (2722) and the sixth port (214); synchronously, the first flow guide element (271) receives the fluid guided out of the first receiving chamber (211) via the fifth port (213) and discharges the fluid via the fluid discharge element (4) via the second port (2712) and the first discharge port (2713). When the plunger assembly (23) moves axially from the proximal end to the distal end of the accommodating body (21), the first flow guide element (271) receives the fluid provided by the fluid provider (3) through the first interface (2711) and guides the fluid into the first accommodating cavity (211) through the second interface (2712) and the fifth interface (213); synchronously, the second flow guiding element (272) receives the fluid guided out of the second receiving cavity (212) through the sixth port (214), and discharges the fluid through the fourth port (2722) and the second discharge port (2723) and through the fluid discharge element (4).

It should be noted that the number of pistons included in the plunger assembly is not limited to one or two in the above embodiments, and may be 3 or more. When the number of pistons is 3 or more, the arrangement of the flow directing assembly and associated interfaces may be the same as in the embodiments of the present application, or the number of interfaces and/or sealing elements may be increased.

Optionally, the housing is of the tubular column type or other suitable shape.

An elastic member (28) is further disposed on the link (234) of the driving member (25), the link (234) is pushed to compress the elastic member and drive the plunger assembly (23) to move from the proximal end to the distal end of the accommodating body (21), and the link (234) is released to automatically drive the plunger assembly (23) to move from the distal end to the proximal end of the accommodating body (21) by the resilience provided by the elastic member.

As shown in fig. 13, preferably, the elastic member(s) ((28) A conical spiral structure, the elastic member(s) ((28) Is arranged between the proximal end of the driving component (25) and the proximal outer side wall of the accommodating body (21).

Preferably, the elastic member(s) ((28) The end with the smallest diameter is arranged at the proximal end of the driving component (25), and the elastic component(s) ((28) The end with the largest diameter is arranged on the outer side wall of the near end of the accommodating body (21).

When the perfusion device is operated by one hand, the amplitude of the hand pulling or pushing the driving component (25) is limited, for example, 10cm, if the fluid in the accommodating body (21) is completely discharged, correspondingly, the length of the connecting rod of the plunger component (23) is required to be designed to be about 10cm, and if the elastic component(s) (are/is/are) is/are used28) The distance between the near end of the driving component (25) and the near end outer side wall of the containing body (21) is larger than 0 when the driving component is compressed to the maximum degree, the actual length of the connecting rod is smaller than 10cm, and when the driving component (25) is pulled or pushed by hand to drive the connecting rod to move, the fluid in the containing body (21) cannot be completely discharged. If the length of the link is increased at the time of design, the increased length of the link will increase the difficulty of pulling or pushing the drive assembly (25) by hand.

In the embodiment of the application, when the driving assembly (25) drives the plunger assembly (23) to move from the proximal end to the distal end of the accommodating body (21), (elastic member28) Is compressed due to the elastic member (28) Is a conical spiral knotStructure, during compression, the elastic element is compressed (28) Gradually squashed, and simultaneously the small-diameter circular ring and the large-diameter circular ring are not stacked, so that the distance between the proximal end of the driving component (25) and the proximal outer side wall of the accommodating body (21) can be as close to 0 at the minimum. And if the elastic member(s) ((s))28) In a general shape, e.g. cylindrical helical structure, resilient member: (28) When compressed, the multiple layers of rings stack, resulting in a distance between the proximal end of the drive assembly (25) and the proximal outer sidewall of the housing (21) that is much greater than 0.

The application also provides a use of the fluid perfusion device for perfusion of fluid in endoscopic surgery. Such endoscopic procedures include, but are not limited to, the use of ureteroscopes, hysteroscopes, and other endoscopic procedures within the human or animal body.

The application also provides a use of the fluid perfusion device for perfusion of fluid in the intracorporeal lithotripsy. Such lithotripsy procedures include, but are not limited to, lithotripsy procedures for kidney stones, ureteral stones, gall stones, and other stones in the human or animal body.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. An infusion device (1) for connecting a fluid provider (3) and a fluid discharge member (4), respectively, for introducing a fluid from the fluid provider (3) and discharging it via the fluid discharge member (4), characterized in that the infusion device (1) comprises:

the fluid container comprises a containing body (11), a containing cavity (111) for containing fluid is arranged in the containing body, and a near end interface (112) and a far end interface (113) which are communicated with the containing cavity (111) are respectively arranged at the near end and the far end of the containing body (11);

a plunger assembly (13) disposed in the receiving cavity (111);

a driving component (15), which is connected with the plunger component (13) and is used for driving the plunger component (13) to move axially in the accommodating cavity (111); and

a flow directing assembly (17), comprising:

a first fluid guide (171) communicating with the fluid provider (3), the proximal port (112) of the receiving chamber and the fluid discharge (4), respectively;

a second fluid guide (172) communicating with the fluid provider (3), the distal port (113) of the receiving chamber and the fluid discharge member (4), respectively; wherein,

2. The perfusion device according to claim 1, wherein the first baffle member (171) further has a first port (1711), a second port (1712), and a first outlet port (1713) for communicating with the fluid provider (3) through the first port (1711), is communicated with the near end interface (112) of the containing cavity (111) through the second interface (1712), and communicates with the fluid discharge member (4) through the first discharge port (1713), the second flow guiding element (172) further has a third port (1721), a fourth port (1722) and a second outlet (1723), to communicate with the fluid provider (3) through the third interface (1721), is communicated with the far end interface (113) of the containing cavity (111) through the fourth interface (1722), and communicates with the fluid discharge member (4) through the second discharge port (1723).

3. The perfusion device of claim 2, wherein the first port (1711), the first outlet port (1713), the third port (1721), and the second outlet port (1723) are one-way valve structures.

4. The perfusion apparatus according to claim 1, wherein the plunger assembly (13) further includes a reciprocating piston (131) and a connecting rod (134) connected to the reciprocating piston (131), an outer edge of the reciprocating piston (131) closely contacts an inner edge wall of the accommodating chamber (111) to form a first chamber (114) and a second chamber (115) of vacuum inside the accommodating chamber (111), and inner volumes of the first chamber (114) and the second chamber (115) are relatively expandable or contractible along with the axial movement of the connecting rod (134) driving the reciprocating piston (131) in the accommodating chamber (111).

5. A perfusion apparatus (2) respectively connected to a fluid provider (3) and a fluid discharge member (4) for introducing a fluid from the fluid provider (3) and discharging the fluid through the fluid discharge member (4), the perfusion apparatus (4) comprising:

a flow directing assembly (27), comprising:

a first fluid guide (271) respectively communicating with the fluid supplier (3), the fifth port (213) of the container and the fluid discharge member (4);

a second fluid guide (272) respectively communicating with the fluid supplier (3), the sixth port (214) of the container and the fluid discharge member (4); wherein,

6. The perfusion device as recited in claim 5, wherein the housing further has a proximal end adjacent to the driving element and a distal end opposite to the proximal end, and the first housing chamber is adjacent to the proximal end of the housing and the second housing chamber is adjacent to the distal end of the housing.

7. The perfusion device according to claim 6, wherein the fifth port communicates with a side of the first receiving chamber adjacent to the proximal end of the receiving body, the sixth port communicates with a side of the second receiving chamber adjacent to the distal end of the receiving body, the first motion state is that the third piston (231) and the fourth piston (232) move axially from the distal end to the proximal end, and the second motion state is that the third piston (231) and the fourth piston (232) move axially from the proximal end to the distal end.

8. The perfusion device as claimed in claim 6, wherein the fifth port communicates with a side of the first receiving chamber away from the proximal end of the receiving body, the sixth port communicates with a side of the second receiving chamber away from the distal end of the receiving body, the first motion state is that the third piston (231) and the fourth piston (232) move axially from the proximal end to the distal end, and the second motion state is that the third piston (231) and the fourth piston (232) move axially from the distal end to the proximal end.

9. The perfusion device according to claim 5, wherein a sealing element (210) is further disposed between the first receiving chamber (211) and the second receiving chamber (212) for isolating the first receiving chamber (211) from the second receiving chamber (212).

10. The filling device as claimed in claim 9, wherein the housing (21) further has a first venting hole (215), the first venting hole (215) is adjacent to the sealing element (210) and communicates with the second housing chamber.

11. The perfusion device as claimed in claim 5, wherein the first receiving chamber (211) further has a third exhaust hole (216), and the second receiving chamber (212) further has a fourth exhaust hole (217), wherein the third exhaust hole (216) and the fifth port (213) are respectively disposed at two sides of the first receiving chamber (211) corresponding to the third piston (231), and the fourth exhaust hole (217) and the sixth port (214) are disposed at two sides of the second receiving chamber (212) corresponding to the fourth piston (232).

12. The perfusion device as claimed in claim 11, wherein a sealing element (210) is further disposed between the first receiving chamber (211) and the second receiving chamber (212) for isolating the first receiving chamber (211) from the second receiving chamber (212).

13. The perfusion apparatus according to claim 9, 10 or 12, wherein a sealing element (210) separates the first receiving chamber (211) from the second receiving chamber (212) into two chambers having the same volume, and the sealing element (210) is disposed between the third piston (231) and the fourth piston (232).

14. The perfusion device according to claim 5, wherein the first flow guide (271) further has a first port (2711), a second port (2712) and a first outlet port (2713) for communicating with the fluid provider (3) via the first port (2711), is communicated with the fifth interface (213) of the first containing cavity (211) through the second interface (2712), and communicates with the fluid discharge member (4) through the first discharge port (2713), the second diversion element (272) also has a third port (2721), a fourth port (2722) and a second outlet (2723), to communicate with the fluid provider (3) through the third interface (2721), is communicated with a sixth interface (214) of the second containing cavity (212) through the fourth interface (2722), and communicates with the fluid discharge member (4) through the second discharge port (2723).

15. The perfusion device according to claim 14, wherein the first port (2711), the first discharge port (2713), the third port (2721), and the second discharge port (2723) are of a one-way valve structure.

16. Perfusion device according to claim 1 or 5, characterized in that the containing body (11,21) is of the tubular column type.

17. The infusion device according to claim 1 or 5, the proximal end of the housing (11,21) further having a proximal side wall which is at least partially removable.

18. The perfusion apparatus according to claim 1 or 5, wherein the link (134, 234) of the driving member (15,25) is further provided with an elastic member, the elastic member is compressed by pushing the link (134, 234) and drives the plunger member (13, 23) to move from the proximal end to the distal end of the housing (11,21), and the plunger member (13, 23) is automatically driven to move from the distal end to the proximal end of the housing (11,21) by releasing the link (134, 234) due to the resilience provided by the elastic member.

19. The infusion device according to claim 18, wherein the resilient member is of a conical helical configuration and is disposed between the proximal end of the drive assembly (15,25) and the proximal outer side wall of the housing (11, 21).

20. The infusion device according to claim 19, wherein the end of the resilient member having the smallest diameter is provided at the proximal end of the actuating member (15,25) and the end of the resilient member having the largest diameter is provided at the proximal outer side wall of the housing (11, 21).

21. Use of the perfusion device of claim 1 or 5 for perfusion of fluids in endoscopic surgery.

22. Use of the perfusion device of claim 1 or 5 for perfusion of fluid in intracorporeal lithotripsy.