Choke valve and surgical approach instrument
By designing the combination of the external sealing cover, intermediate seal and fixture of the air barrier valve, the coordination between the flange and the groove and the elastic material are used to solve the problem of poor sealing effect of the air barrier valve, and the surgical access channel is realized Efficient sealing to ensure stability of pneumoperitoneum.
Patent Information
- Application Number
- CN202420698548.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-07
Smart Images
Figure CN222323588U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical instruments, in particular to a choke valve and a surgical approach instrument. Background Art
[0002] Laparoscopic surgery, vaginal surgery and other surgeries all require the establishment of pneumoperitoneum in the abdominal cavity to provide space for surgical operations. Surgical access instruments can be used to puncture human tissue and establish pneumoperitoneum in the abdominal cavity. The surgical access instrument is used to establish an access channel, and the puncture device performs a puncture operation on human tissue through the access channel and withdraws the access channel after the puncture operation is completed. During the entire process, the sealing of the access channel in the surgical access instrument needs to be ensured.
[0003] The air-blocking valve is installed in the access channel of the surgical access instrument. The trocar is inserted into or withdrawn from the access channel through the air-blocking valve. The air-blocking valve ensures the sealing of the access channel during the entire process. If the sealing effect of the air-blocking valve is not good, air leakage is likely to occur during the process of the trocar being inserted into or withdrawn from the access channel, affecting the establishment and maintenance of pneumoperitoneum. Utility Model Content
[0004] In order to solve the above technical problems, the present application provides an air blocking valve and a surgical access instrument.
[0005] In a first aspect, an embodiment of the present application discloses a choke valve for sealing an access channel in a surgical access instrument, the choke valve comprising an outer sealing cover, an intermediate sealing member and a fixing member;
[0006] The outer sealing cover is provided with a first flange and a second flange; the fixing member includes a first groove; the first flange matches with the first groove to connect the fixing member and the outer sealing cover;
[0007] The middle seal is located between the fixing member and the outer sealing cover, and the second flange abuts against the middle seal to keep the middle seal and the fixing member fixed;
[0008] The interiors of the external sealing cover, the middle sealing piece and the fixing piece are connected to form the inlet of the air blocking valve; a cutout is arranged at one end of the external sealing cover away from the fixing piece, and the cutout is used as the outlet of the air blocking valve.
[0009] In some possible embodiments,
[0010] The outer sealing cover and the middle sealing member are made of elastic material; the fixing member is made of non-elastic material.
[0011] In some possible embodiments,
[0012] The air blocking valve further comprises a cover plate; the cover plate is provided with at least one positioning column; the intermediate sealing member is provided with at least one first positioning hole; the fixing member is provided with at least one second positioning hole;
[0013] The positioning post passes through the first positioning hole and the second positioning hole in sequence to connect the cover plate, the middle sealing member and the fixing member.
[0014] In some possible embodiments,
[0015] The fixing piece is provided with a protrusion;
[0016] The middle seal includes a lower structure whose shape matches the raised portion;
[0017] The middle sealing member and the fixing member are connected by matching the protruding portion with the lower structure.
[0018] In some possible embodiments,
[0019] The middle seal also includes an upper structure connected above the lower structure, the upper structure has a conical outer surface, and the maximum outer diameter of the conical outer surface is less than or equal to the outer diameter of the lower structure; the second flange abuts the conical outer surface.
[0020] In some possible embodiments,
[0021] The cross-sectional shapes of the outer sealing cover, the middle sealing member and the fixing member are circular.
[0022] In some possible embodiments,
[0023] One end of the external sealing cover away from the fixing piece is an end surface formed by at least two inclined planes, and a cutout is arranged on the end surface.
[0024] In some possible embodiments,
[0025] The shape of the incision includes one of a straight line, a cross or a star.
[0026] In a second aspect, an embodiment of the present application discloses a surgical access instrument for establishing pneumoperitoneum, the surgical access instrument comprising the above-mentioned choke valve and an access channel; the choke valve is inserted into the access channel.
[0027] In some possible embodiments,
[0028] Surgical access instruments also include trocars;
[0029] The trocar passes through the inlet and outlet of the air blocking valve in sequence and enters the access channel, and the incision and the middle sealing member are sealed and fitted with the outer wall of the trocar.
[0030] The technical solution provided by the embodiment of the present application has the following technical effects:
[0031] The air blocking valve of the embodiment of the present application is used to seal the access channel in the surgical access instrument, and the air blocking valve includes an external sealing cover, an intermediate sealing member and a fixing member; the external sealing cover is provided with a first flange and a second flange; the fixing member includes a first groove; the first flange cooperates with the first groove to connect the fixing member and the external sealing cover; the intermediate sealing member is located between the fixing member and the external sealing cover, and the second flange abuts the intermediate sealing member to keep the intermediate sealing member and the fixing member fixed; the external sealing cover, the intermediate sealing member, and the fixing member are internally connected to form the entrance of the air blocking valve; an incision is provided at one end of the external sealing cover away from the fixing member, and the incision is used as the outlet of the air blocking valve. In the embodiment of the present application, the cooperation of the external sealing cover and the intermediate sealing member realizes double sealing inside and outside, and the cooperation of the external sealing cover and the fixing member provides overall sealing, which improves the sealing performance of the air blocking valve and provides sealing protection for establishing and maintaining pneumoperitoneum. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0033] Figure 1 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 1 ;
[0034] Figure 2 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 2 ;
[0035] Figure 3 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 3 ;
[0036] Figure 4 is a schematic diagram of an external sealing cover provided in an embodiment of the present application;
[0037] Figure 5 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 4 ;
[0038] Figure 6 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 5 ;
[0039] Figure 7 This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 6 ;
[0040] Figure 8This is a schematic diagram of a choke valve provided in an embodiment of the present application. Figure 7 ;
[0041] Fig. 9 It is a schematic diagram of a surgical access instrument provided in an embodiment of the present application. DETAILED DESCRIPTION
[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0043] It should be noted that the "one embodiment" or "embodiment" referred to in the specification of the embodiment of the present application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present application. It should be understood that in the specification and claims of the embodiment of the present application and the above-mentioned drawings, the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, in the description of the present embodiment, unless otherwise specified, "plurality" means two or more. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system or product including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0044] It should be understood that when a device or component is referred to as "on ...", "adjacent to ...", "connected to" other devices or components, it can be directly on, adjacent to, connected to other devices or components, or there can be intervening devices or components. On the contrary, when a device or component is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" other devices or components, there is no intervening device or component. It should be understood that although the terms first, second, third, etc. can be used to describe various components, areas, layers and / or parts, these components, areas, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one component, area, layer or part from another component, area, layer or part. Therefore, without departing from the teachings of the present application, the first component, area, layer or part discussed below can be expressed as the second component, area, layer or part. And when the second component, area, layer or part is discussed, it does not mean that the present application necessarily has the first component, area, layer or part.
[0045] In order to make the purpose, technical solution and advantages disclosed in the embodiments of the present application more clear, the embodiments of the present application are further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and are not used to limit the embodiments of the present application.
[0046] The embodiment of the present application provides a blocking valve 1. The blocking valve 1 is installed in a surgical access instrument to provide sealing protection for establishing and maintaining pneumoperitoneum, thereby achieving the establishment of a robotic surgical access channel and the maintenance of pneumoperitoneum during robotic surgery.
[0047] Figure 1 , Figure 2 and Figure 3 They are schematic diagrams of a choke valve 1 provided in an embodiment of the present application. Figure 1 , indicate Figure 2 and hint Figure 3 ,like Figure 1 , Figure 2 and Figure 3 As shown, the air blocking valve 1 comprises an external sealing cover 11, an intermediate sealing member 12, and a fixing member 13. The cross-sectional shape of the external sealing cover 11, the intermediate sealing member 12, and the fixing member 13 perpendicular to the axis is circular.
[0048] In the present application embodiment, Figure 1 , Figure 2 and Figure 3As shown, the external sealing cover 11 is a shell without a bottom surface, and the interior of the shell is a cavity. Two circles of flange structures are arranged on the inner surface of the shell, namely, a first flange 111 located at the bottom end and a second flange 112 located above the first flange 111, and the plane where the first flange 111 and the second flange 112 are located is parallel to the plane where the intermediate sealing member 12 and the fixing member 13 are located. The fixing member 13 includes a fixing member first end 131 and a fixing member second end 132 located at both ends, the diameter of the fixing member second end 132 is larger than the diameter of the fixing member first end 131, and a first groove 133 is formed between the fixing member first end 131 and the fixing member second end 132. The fixing member first end 131 is inserted into the cavity in the external sealing cover 11, the fixing member second end 132 protrudes out of the cavity in the external sealing cover 11, and the first flange 111 of the external sealing cover 11 is inserted into the first groove 133 of the fixing member 13, thereby connecting the external sealing cover 11 and the fixing member 13. It is understandable that the connection between the external sealing cover 11 and the fixing member 13 is achieved by the cooperation of the flange and the groove, so the diameter of the second end 132 of the fixing member can also be equal to or smaller than the diameter of the first end 131. Considering that the fixing member 13 and the external sealing cover 11 are made of different materials, the diameter of the second end 132 of the fixing member is greater than or equal to the diameter of the first end 131, which can better protect the external sealing cover 11 and reduce the wear of the external sealing cover 11.
[0049] In the embodiment of the present application, the middle seal 12 is located inside the cavity and above the fixing member 13; the bottom surface of the middle seal 12 is in contact with the first end 131 of the fixing member, and the top surface of the middle seal 12 is fixed by the second flange 112. In order to ensure the stability of the middle seal 12 in the air blocking valve 1, the tightness of the connection between the middle seal 12 and the fixing member 13 is crucial; in the specific design, it is possible to choose to add a connecting component to connect the middle seal 12 and the fixing member 13, or to choose to connect the middle seal 12 and the fixing member 13 by matching each other through a reasonable structural design. In the air blocking valve 1, the external sealing cover 11, the middle seal 12 and the fixing member 13 are tightly connected to ensure the stability of the air blocking valve 1 when in use; wherein, the fixing member 13 is installed at the bottom of the air blocking valve 1, which is equivalent to the base of the entire air blocking valve 1, and provides a fixed installation position for the external sealing cover 11 and the middle seal 12.
[0050] In the present application embodiment, Figure 1 , Figure 2 and Figure 3As shown, the outer sealing cover 11 is provided with a cutout 113 at one end away from the fixing member 13, a first hole 121 is provided in the middle of the middle sealing member 12, a second hole 134 is provided in the middle of the fixing member 13, and the first hole 121, the second hole 134 and the cavity are interconnected, and the cutout 113 exists as an entrance and exit, and has a closed state and an open state. The air blocking valve 1 is installed in a surgical access instrument, and when no object penetrates the air blocking valve 1, the cutout 113 remains in a closed state to prevent gas leakage. When the puncture device (the puncture device is used as an example here for explanation, and other objects that penetrate into the surgical access device through the air blocking valve 1, such as a robotic arm or an endoscope) is inserted into the surgical access device through the second channel 134, the first channel 121 and the incision 113 in the air blocking valve 1 in sequence, the incision 113 that provides the entrance and exit for the puncture device changes from a closed state to an open state, and the elastic incision 113 and the first channel 121 in the intermediate seal 12 are sealed together with the outer wall of the puncture device to form a good seal to prevent gas leakage. The existence of the intermediate seal 12 is equivalent to adding a sealing guarantee to the air blocking valve 1, and cooperates with the external sealing cover 11 that also plays a sealing role to ensure the sealing of the puncture device when it moves relative to the air blocking valve 1, further strengthen the sealing effect, and greatly reduce the occurrence of gas leakage. The fixing member 13 cooperates with the external sealing cover 11 and the intermediate seal 12 to provide a sealing effect for the overall structure of the air blocking valve 1.
[0051] In the embodiment of the present application, the external sealing cover 11 and the middle sealing member 12 in the air blocking valve 1 need to play a sealing role, so the external sealing cover 11 and the middle sealing member 12 are required to have good deformation ability when they come into contact with other objects; because elastic materials have good resilience and deformation ability, elastic materials are selected to prepare the external sealing cover 11 and the middle sealing member 12, for example, silicone rubber materials with good elasticity are preferably selected. The fixing member 13 in the air blocking valve 1 needs to ensure the stability of the overall structure when the puncture device is inserted into or withdrawn from the surgical access instrument through the air blocking valve 1, so the preparation material of the fixing member 13 is selected from a high-strength material that is not easy to deform, for example, the selected high-strength material is polycarbonate or engineering plastics such as acrylonitrile-butadiene-styrene plastic.
[0052] In the embodiment of the present application, the end of the outer shell of the external sealing cover 11 away from the fixing member 13 is an end surface assembled from multiple inclined surfaces, and a cutout 113 is provided on the end surface. Figure 1 As shown, multiple inclined surfaces in the end face can be assembled in pairs to form a sealing flap, and multiple sealing flaps can be assembled into an end face. At this time, a cutout 113 can be set at the contact point of the two inclined surfaces in each sealing flap in the end face, and a cutout 113 can also be set at the contact position of two adjacent sealing flaps in the end face; when the end face is assembled from four sealing flaps, the cutout 113 set at the contact point of the two inclined surfaces in each sealing flap is in a cross shape. Figure 4Schematic diagram of an external sealing cover provided in an embodiment of the application, such as Figure 4 As shown, the end face may include two inclined surfaces, and the two inclined surfaces are contacted and assembled into one end face, and at this time, an incision 113 may be set at the contact position of the two inclined surfaces; when the end face is assembled by two inclined surfaces, the incision 113 set at the position where the two inclined surfaces contact is in a straight line shape. In the external sealing cover 11, the inclined surface in the outer shell can play a certain guiding role, making it easier for the puncture device to push open the incision 113 and penetrate into the surgical access instrument. Multiple inclined surfaces can also disperse the stress applied by the puncture device to the external sealing cover 11, so that the external sealing cover 11 is not easily damaged. In addition, due to the guiding effect of the inclined surface in the closed surface, the hardness of the material prepared for the external sealing cover 11 can also be appropriately increased, ensuring that the incision 113 is easy to open while improving the strength of the external sealing cover 11. In order to reduce the difficulty of processing and ensure the sealing effect, the number of sealing petals in the external sealing cover 11 should not be too many, preferably 2 to 6.
[0053] In the embodiment of the present application, in order to ensure the stability of the intermediate seal 12 in the air blocking valve 1, the tightness of the connection between the intermediate seal 12 and the fixing member 13 is very important. Based on the connection method between the intermediate seal 12 and the fixing member 13, the present application provides the following two embodiments.
[0054] Example 1
[0055] Embodiment 1 chooses to add a connecting component to connect the middle seal 12 and the fixing member 13. Based on the choke valve structure described above, a cover plate 14 is added to the choke valve 1 to connect the middle seal 12 and the fixing member 13, and the middle seal 12 and the fixing member 13 are connected by plug-in connection, thereby enhancing the structural stability of the middle seal 12 and the fixing member 13 in the choke valve.
[0056] Figure 5 This is a schematic diagram of a choke valve 1 provided in an embodiment of the present application. Figure 4 , Figure 6 This is a schematic diagram of a choke valve 1 provided in an embodiment of the present application. Figure 5 ,like Figure 5 and Figure 6 As shown, the choke valve 1 comprises an outer sealing cover 11 , an intermediate sealing member 12 , a fixing member 13 and a cover plate 14 .
[0057] In Embodiment 1, the exterior of the external sealing cover 11 is a shell without a bottom surface, the interior of the shell is a cavity, and the inner surface of the shell is provided with a first flange 111 and a second flange 112; the shell in the external sealing cover 11 is provided with a cutout 113 at one end away from the fixing member 13. The fixing member 13 includes a fixing member first end 131 and a fixing member second end 132 located at both ends, and a first groove 133 is formed between the fixing member first end 131 and the fixing member second end 132; a second channel 134 is provided in the middle of the fixing member 13, and at least one second positioning hole 132 is provided around the second channel 134 in the fixing member 13. A first channel 121 is provided in the middle of the intermediate sealing member 12, and at least one first positioning hole 122 is provided around the first channel 121. A third channel 141 is provided in the middle of the cover plate 14, and at least one positioning column 142 is provided around the third channel 141. Moreover, the third hole 141 is in communication with the first hole 121 , the second hole 134 and the cavity in the external sealing cover 11 ; the positions and sizes of the positioning column 142 , the first positioning hole 122 and the second positioning hole 132 match each other.
[0058] In Example 1, the positioning column 142 is inserted into the first positioning hole 122 and the second positioning hole 132 in sequence to connect the cover plate 14, the middle seal 12 and the fixing member 13, forming a combination of the cover plate 14, the middle seal 12 and the fixing member 13, so as to prevent the middle seal 12 from shaking left and right or moving up and down during the insertion or withdrawal of the puncture device. This combination is inserted into the cavity of the external sealing cover 11, the second end 132 of the fixing member in the combination protrudes out of the cavity in the external sealing cover 11, and the part of the fixing member in the combination other than the second end 132 is inserted into the cavity and fixed by the elasticity of the external sealing cover 11; moreover, the fixing member 13 and the external sealing cover 11 in the combination are connected by the first flange 111 in the external sealing cover 11 being inserted into the first groove 133 in the fixing member 13, and the cover plate 14 and the external sealing cover 11 in the combination are strengthened by the second flange 112 (the second flange 112 is located above the cover plate 14 to prevent the combination from moving upward). The cooperation of the first flange 111 and the second flange 112 in the external sealing cover 11 and the combination formed by the fixing member 13, the middle sealing member 12 and the cover plate 14 makes the structure of the entire choke valve 1 more stable, so that the choke valve can better play a sealing role.
[0059] In Example 1, elastic materials are selected to prepare the outer sealing cover 11 and the middle sealing member 12, and silicone rubber materials with good elasticity are preferably selected; high-strength materials that are not easily deformed are selected to prepare the fixing member 13 and the cover plate 14, and engineering plastics such as polycarbonate or acrylonitrile-butadiene-styrene plastics are preferably selected.
[0060] In Example 1, the outer sealing cover 11 and the middle sealing member 12 cooperate with each other to play a double sealing role inside and outside the air blocking valve 1; the fixing member 13 cooperates with the outer sealing cover 11 and the middle sealing member 12 to provide a sealing effect for the overall structure of the air blocking valve 1; the introduction of the cover plate 14 can make the position of the middle sealing member 12 in the air blocking valve 1 more stable, thereby preventing the puncture device from shifting during the process of penetrating the air blocking valve 1. The outer sealing cover 11, the middle sealing member 12, the fixing member 13 and the cover plate 14 cooperate with each other to ensure the stability of the overall structure, which is conducive to improving the sealing performance of the air blocking valve 1.
[0061] Example 2
[0062] Figure 7 This is a schematic diagram of a choke valve 1 provided in an embodiment of the present application. Figure 6 , Figure 8 This is a schematic diagram of a choke valve 1 provided in an embodiment of the present application. Figure 7 ,like Figure 7 and Figure 8 As shown, the choke valve 1 comprises an outer sealing cover 11 , an intermediate sealing member 12 and a fixing member 13 .
[0063] In Embodiment 2, the exterior of the external sealing cover 11 is a shell without a bottom surface, the interior of the shell is a cavity, and the inner surface of the shell is provided with a first flange 111 and a second flange 112; the shell in the external sealing cover 11 is provided with a cutout 113 at one end away from the fixing member 13. The fixing member 13 includes a fixing member first end 131 and a fixing member second end 132, a first groove 133 is provided between the fixing member first end 131 and the fixing member second end 132, a protrusion 136 is provided on the fixing member first end 131, and the diameter of the protrusion 136 is smaller than the diameter of the fixing member first end 131; a second channel 134 is provided in the middle of the fixing member 13, and the protrusion 136 is located around the second channel 134. The intermediate sealing member 12 is composed of an upper structure 123 and a lower structure 124 connected in one piece, the upper structure 123 has a conical outer surface, and the maximum outer diameter of the conical outer surface is less than or equal to the outer diameter of the lower structure 124, and the structure of the entire intermediate sealing member 12 is similar to a step. A first lower channel 1211 is set in the middle of the lower structure 124, and the shapes of the lower structure 124 and the first lower channel 1211 match the protrusion 136 in the fixing member 13; a first upper channel 1212 is set in the middle of the upper structure 123, the first upper channel 1212 and the first lower channel 1211 are interconnected and form the first channel 121, and the first channel 121, the second channel 134 and the cavity in the external sealing cover 11 are interconnected.
[0064] In the second embodiment, the protrusion 136 in the fixing member 13 can be inserted into the first lower channel 1211 of the intermediate seal 12, and the fixing member 13 and the intermediate seal 12 are connected in a similar manner to the groove and protrusion, so as to form a combination of the fixing member 13 and the intermediate seal 12. This combination is inserted into the cavity of the external sealing cover 11, the second end 132 of the fixing member in the combination protrudes out of the cavity in the external sealing cover 11, and the part of the fixing member in the combination other than the second end 132 is inserted into the cavity and fixed by the elasticity of the external sealing cover 11; moreover, the fixing member 13 and the external sealing cover 11 in the combination are connected by the first flange 111 in the external sealing cover 11 being inserted into the first groove 133 in the fixing member 13, and the intermediate seal 12 and the external sealing cover 11 in the combination are strengthened by the second flange 112 in the external sealing cover 11 abutting against the tapered outer surface of the intermediate seal 12. Specifically, the outer diameter of the lower structure 124 in the middle seal 12 is greater than or equal to the maximum outer diameter of the upper structure 123, so as to prevent the second flange 112 from moving downward and passing over the middle seal 12 when the external seal cover 11 and the assembly are assembled; at the same time, the upper structure 123 has a tapered outer surface, and the second flange 112 and the upper structure 123 are gradually squeezed together during the downward movement of the second flange 112, so as to achieve the seal between the external seal cover 11 and the middle seal 12. In addition, the presence of the second flange 112 can effectively prevent the lower structure 124 from moving upward, making the overall structure more stable. The cooperation of the first flange 111 and the second flange 112 in the external seal cover 11 and the assembly formed by the fixing member 13 and the middle seal 12 makes the structure of the entire air barrier 1 more stable, so that the air barrier 1 can better play a sealing role.
[0065] In Example 2, elastic materials are selected to prepare the outer sealing cover 11 and the middle sealing member 12, and silicone rubber materials with good elasticity are preferably selected; high-strength materials that are not easily deformed are selected to prepare the cover plate 14, and engineering plastics such as polycarbonate or acrylonitrile-butadiene-styrene plastics are preferably selected.
[0066] In Example 2, the external sealing cover 11 and the middle sealing member 12 cooperate with each other to play a dual sealing role of the inside and outside of the air blocking valve 1; the fixing member 13 cooperates with the external sealing cover 11 and the middle sealing member 12 to provide a sealing effect for the overall structure of the air blocking valve 1. The external sealing cover 11, the middle sealing member 12 and the fixing member 13 cooperate with each other to ensure the stability of the overall structure, which is conducive to improving the sealing performance of the air blocking valve 1.
[0067] The embodiment of the present application also provides a surgical access instrument for establishing pneumoperitoneum. Fig. 9 is a schematic diagram of a surgical access instrument provided in an embodiment of the present application, such as Fig. 9As shown, the surgical access instrument includes the above-mentioned air blocking valve 1 and access channel 2. When assembling the instrument, the air blocking valve 1 is screwed into the access channel 2 as a whole, and the air blocking valve 1 and the access channel 2 are interference fit. Since the external sealing cover 11 is an elastic structure, sealing is achieved. In the surgical access instrument, the air blocking valve 1 achieves double sealing inside and outside through the cooperation of the external sealing cover 11 and the intermediate sealing member 12, and further provides overall sealing through the cooperation of the external sealing cover 11 and the fixing member 13, which greatly enhances the sealing performance, so that the air blocking valve 1 seals the access channel in the surgical access instrument and provides sealing protection for establishing and maintaining pneumoperitoneum. The surgical access instrument can be used in transvaginal surgery, wherein the presence of the air blocking valve 1 provides sealing protection for establishing and maintaining pneumoperitoneum through the vagina, and realizes the establishment of a robotic surgical access channel and the maintenance of pneumoperitoneum during robotic surgery.
[0068] In the embodiment of the present application, the surgical access instrument further includes a puncture device 3. When the puncture device 3 sequentially passes through the second hole 134, the first hole 121 and the incision 113 in the air blocking valve 1 and penetrates into the access channel 2, the incision 113 in the air blocking valve 1 is expanded from a closed state to an expanded state, and the incision 113 and the first hole 121 are both sealed and fitted with the outer wall of the puncture device 3; when the puncture device 3 is withdrawn from the air blocking valve 1, the incision 113 is restored from the expanded state to the closed state.
[0069] It should be noted that the above-mentioned sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.
[0070] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.
[0071] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A choke valve, characterized in that: Used to seal an access channel in a surgical access instrument, the air blocking valve comprises an outer sealing cover, an intermediate sealing member and a fixing member; The outer sealing cover is provided with a first flange and a second flange; the fixing member includes a first groove; the first flange cooperates with the first groove to connect the fixing member and the outer sealing cover; The intermediate seal is located between the fixing member and the outer sealing cover, and the second flange abuts against the intermediate seal to keep the intermediate seal and the fixing member fixed; The interiors of the external sealing cover, the intermediate sealing member and the fixing member are connected to form the inlet of the air blocking valve; a cutout is arranged at one end of the external sealing cover away from the fixing member, and the cutout is used as the outlet of the air blocking valve.
2. The choke valve according to claim 1, characterized in that The outer sealing cover and the middle sealing member are made of elastic material; the fixing member is made of non-elastic material.
3. The choke valve according to claim 1, characterized in that The air blocking valve further comprises a cover plate; the cover plate is provided with at least one positioning column; the intermediate sealing member is provided with at least one first positioning hole; the fixing member is provided with at least one second positioning hole; The positioning column passes through the first positioning hole and the second positioning hole in sequence to connect the cover plate, the middle sealing member and the fixing member.
4. The choke valve according to claim 1, characterized in that The fixing member is provided with a protrusion; The intermediate seal comprises a lower structure, the shape of which matches the raised portion; The middle sealing member and the fixing member are connected by the protrusion cooperating with the lower structure.
5. The choke valve according to claim 4, characterized in that The intermediate seal also includes an upper structure connected above the lower structure, the upper structure has a conical outer surface, and the maximum outer diameter of the conical outer surface is less than or equal to the outer diameter of the lower structure; the second flange abuts the conical outer surface.
6. The choke valve according to claim 1, characterized in that The cross-sectional shapes of the outer sealing cover, the middle sealing member and the fixing member are circular.
7. The choke valve according to claim 1, characterized in that One end of the external sealing cover away from the fixing member is an end surface formed by at least two inclined planes, and the cutout is arranged on the end surface.
8. The choke valve according to claim 7, characterized in that The shape of the incision includes one of a straight shape, a cross shape or a star shape.
9. A surgical access instrument, characterized in that: Used to establish pneumoperitoneum, the surgical access instrument comprises a choke valve and an access channel as described in any one of claims 1 to 8; the choke valve is inserted into the access channel.
10. The surgical access instrument according to claim 9, characterized in that: The surgical access instrument also includes a puncture device; The trocar sequentially passes through the inlet and outlet of the air blocking valve and enters the access channel, and the incision and the intermediate sealing member are sealed and fitted with the outer wall of the trocar.