Instrument guide and surgical port assembly

Abstract

The application relates to the technical field of medical equipment, in particular to an instrument guide and a surgical port assembly. The instrument guide comprises a guide tube, which comprises a mounting part and a tubular part. The mounting part is provided with a mounting cavity, which is in communication with a cavity of the tubular part. A sealing assembly is arranged in the mounting part and comprises an instrument guide and a modular instrument sealing element engaged with the instrument guide. A plurality of instrument channels for passing surgical instruments can be formed in the instrument guide, and the instrument channels are jointly defined by the instrument guide, the instrument sealing element and the tubular part. The instrument guide further comprises an exhaust valve arranged on a side wall of the mounting part, and the exhaust valve can be switched between an open position and a closed position. In the open position, an exhaust channel is formed in the instrument guide, and in the closed position, the exhaust channel is closed. The instrument guide can be used in a single-hole surgical robot system and can remove smoke generated in a surgical process.

Description

Technical Field

[0001] This application relates to the field of medical technology, specifically to a device guide and surgical port assembly. Background Technology

[0002] Single-port minimally invasive surgery is an advanced minimally invasive technique that completes all surgical procedures through a single small incision. Single-port minimally invasive surgery can be performed using a single-port surgical robot system. In this system, an instrument guide is used to guide multiple surgical instruments into the patient's body. The instrument guide works in conjunction with a cannula and a cannula seal. The cannula is installed at the distal end of the surgical robot, the instrument guide is placed inside the cannula, and the cannula seal is used to maintain pneumoperitoneum between the instrument guide and the cannula. Utility Model Content

[0003] This application provides an instrument guide to solve some of the technical problems in the prior art. This application also provides a surgical port assembly using the above-described instrument guide.

[0004] In a first aspect, this application provides an instrument guide, including a guide tube comprising a mounting portion and a tubular portion, the mounting portion having a mounting cavity communicating with the cavity of the tubular portion; and a sealing assembly disposed within the mounting portion, the sealing assembly comprising an instrument guide and a modular instrument seal engaging with the instrument guide; the instrument guide is capable of forming a plurality of instrument channels for surgical instruments to pass through, the instrument channels being defined by the instrument guide, the instrument seal, and the tubular portion; the instrument guide further includes an exhaust valve disposed on the side wall of the mounting portion, the exhaust valve being switchable between an open position and a closed position, wherein in the open position, an exhaust channel is formed within the instrument guide, and in the closed position, the exhaust channel is closed.

[0005] In some embodiments, the mounting portion is located near the proximal end of the tubular portion, and an exhaust port is provided on the side wall. An exhaust valve is movably disposed on the exhaust port to seal or open the exhaust port. The exhaust port can connect the mounting cavity and the instrument channel in the tubular portion to the outside to form the exhaust channel.

[0006] In some embodiments, the vent valve can be manually pressed toward the inside of the guide tube to switch from the closed position to the open position.

[0007] In some embodiments, the exhaust valve includes an exhaust port sealing portion and an air guide portion connected to the outside of the exhaust port sealing portion; in the closed position, the exhaust port sealing portion seals the exhaust port; in the open position, the exhaust port sealing portion separates from the exhaust port, the air guide portion communicates the mounting cavity with the outside, and together with the exhaust port defines a portion of the exhaust passage.

[0008] In some embodiments, a support structure is provided around the exhaust port on the outer surface of the sidewall, the support structure having a notch, and in the open position, a portion of the air guide communicates with the outside via the notch.

[0009] In some embodiments, the instrument guide further includes a guide disposed within the mounting portion for guiding the movement of the exhaust valve; and / or a limiting member disposed within the mounting portion for limiting the stroke of the exhaust valve.

[0010] In some embodiments, the modular instrument seal includes an air-blocking bracket having a bracket opening for the passage of surgical instruments; an air-blocking plate including a pivot shaft pivotally connected to a distal end of the air-blocking bracket to rotate the air-blocking plate relative to the air-blocking bracket; and a biasing member for biasing the air-blocking plate to a position that closes the bracket opening.

[0011] In some embodiments, the distal surface of the air-blocking bracket is provided with a pair of spaced-apart ear plates, and a limiting portion is provided on the ear plates; both ends of the pivot shaft are pivotally connected to the ear plates; the biasing member is a torsion spring, which is sleeved on the pivot shaft, with one end of the torsion spring supported on the limiting portion and the other end abutting against the air-blocking plate to bias the air-blocking plate to a position that closes the opening of the bracket.

[0012] In some embodiments, the instrument seal includes an air-blocking bracket with a mating cavity, and the instrument guide includes an extension that extends into the mating cavity and is fixed to the air-blocking bracket.

[0013] Secondly, this application provides a surgical port assembly, comprising: an instrument guide as described in any of the above technical solutions, a cannula seal, and a cannula, wherein the cannula is used to receive the instrument guide, and the cannula seal is used to form a seal between the cannula and the instrument guide.

[0014] During surgery, energy devices, such as high-frequency electrical energy devices or ultrasonic devices, may be used to cauterize tissue. Causing tissue to cauterize tissue will generate smoke or aerosols. In order to avoid smoke and aerosols affecting the operation, according to the device guide of this application, by setting an exhaust valve on the mounting part of the device guide, medical staff can expel the smoke and aerosols generated during the operation from the patient through the exhaust valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the surgical port assembly in some embodiments of this application; Figure 2 This is a schematic diagram of the instrument guide of the surgical port assembly in some embodiments of this application; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a cross-sectional view of the surgical port assembly in some embodiments of this application; Figure 5 This is a schematic diagram of the guide tube structure in some embodiments; Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a schematic diagram of the structure of the exhaust valve of the surgical port assembly in some embodiments of this application; Figure 8 This is an exploded view of the surgical port assembly in some embodiments of this application; Figure 9 This is a schematic diagram of the structure of the guide of the surgical port assembly in some embodiments of this application; Figure 10 This is a schematic diagram of the structure of the surgical port assembly in some embodiments of this application, showing the cooperation between the instrument guide and the instrument seal. Figure 11 This is a schematic diagram of the gas-blocking bracket of the surgical port assembly in some embodiments of this application; Figure 12 This is a schematic diagram of the structure of the air baffle plate of the surgical port assembly in some embodiments of this application; Figure 13 This is a schematic diagram of the instrument guide of the surgical port assembly in some embodiments of this application.

[0016] List of feature names corresponding to the labels in the figure: 1. Sleeve; 2. Sleeve seal; 3. Instrument guide; 31. Guide tube; 311. Mounting part; 3111. Side wall; 31111. Exhaust port; 3112. Mounting cavity; 3113. Support structure; 3114. Notch; 312. Tubular part; 3121. Cavity; 32. Sealing assembly; 321. Instrument guide; 3211. Guide channel; 3212. Extension; 322. Instrument seal; 3221. Gas-blocking bracket; 32211. Bracket opening; 32212. Ear plate; 32213. Limiting part; 32214. Mating cavity; 3222. Gas-blocking plate; 32221. Pivot shaft; 3223. Offset element; 3224. Torsion spring; 30. Exhaust valve; 33. Valve core; 331. Exhaust port sealing part; 332. Air guide part; 3321. Groove; 333. Annular groove; 334. Guide section; 3341. Groove; 33411. Limiting wall; 34. First sealing ring; 35. Guide component; 351. Plate; 352. Guide groove; 353. Lug; 354. Rib; 3541. Guide slope; 355. Protrusion; 36. Vertical wall; 361. Slot; 37. Spring; 38. Second sealing ring; 39. Sealing gasket.

[0017] Explanation of reference numerals in parentheses in the accompanying drawings: The feature referred to by the reference numerals in parentheses in the accompanying drawings is the feature represented by both the number inside the parentheses and the number outside the parentheses. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0019] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0020] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0021] The surgical port component provided in this application can be used in a single-port surgical robot system. Please refer to... Figure 1 The surgical port assembly includes a cannula 1, a cannula seal 2, and an instrument guide 3. The cannula 1 is installed at the distal end of the surgical robot during use to receive the instrument guide 3, and the cannula seal 2 is used to form a seal between the cannula 1 and the instrument guide 3.

[0022] Instrument guide 3 is used to guide surgical instruments; please refer to [reference needed]. Figure 2 and Figure 4 The instrument guide 3 includes a guide tube 31 and a sealing assembly 32. Please refer to [reference needed]. Figure 2 , Figure 4 and Figure 5 The guide tube 31 includes a connected mounting portion 311 and a tubular portion 312. In use, the tubular portion 312 is inserted into the sleeve 1. The mounting portion 311 is used to mount the sealing assembly 32 and is located near the proximal end of the tubular portion 312. The mounting portion 311 has a sidewall 3111 and a mounting cavity 3112 defined by the sidewall 3111. The tubular portion 312 has a cavity 3121, and the mounting cavity 3112 communicates with the cavity 3121. The mounting portion 311 and the tubular portion 312 can be two parts of an integral structure guide tube 31, or they can be two separate parts assembled together.

[0023] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 5 The mounting part 311 is bowl-shaped, meaning that the mounting part 311 gradually tapers from the proximal end to the distal end, and the side wall 3111 is a continuous, generally closed curved surface.

[0024] The sealing assembly 32 is disposed within the mounting portion 311 and is sealed to the mounting portion 311. The sealing assembly 32 includes an instrument guide 321 and a modular instrument seal 322, which are engaged.

[0025] The instrument guide 3 can form multiple instrument channels for surgical instruments to pass through, with each instrument channel allowing one surgical instrument to pass through, enabling multiple surgical instruments to enter the patient's body through a single port. Here, "able to form multiple instrument channels for surgical instruments to pass through" means that when a surgical instrument is inserted, the sealing structure in the sealing assembly 32 is opened, thereby forming the instrument channel. Furthermore, the surgical instruments here are surgical instruments in a broad sense, including not only hooks, spatulas, and scissors used for treating surgical sites, but also endoscopes. The instrument channel is defined by the instrument guide 321, the instrument seal 322, and the tubular portion 312, allowing the surgical instrument to enter the patient's body sequentially through the instrument guide 321, the instrument seal 322, and the tubular portion 312.

[0026] During the procedure, energy devices, such as high-frequency energy devices or ultrasonic devices, may be used to cauterize tissue. This cauterization will produce smoke or aerosols. To avoid smoke and aerosols interfering with the surgery, please refer to the following guidelines: Figure 2 , Figure 3 and Figure 4 The instrument guide 3 also includes an exhaust valve 30 disposed on the side wall 3111 of the mounting part 311. The exhaust valve 30 is movably mounted on the side wall 3111 and can switch between an open position and a closed position. When the exhaust valve 30 is in the open position, an exhaust channel is formed inside the instrument guide 3, through which smoke and aerosols generated during surgery in the patient's body can be discharged to the outside. When the exhaust valve 30 is in the closed position, the exhaust channel is closed, ensuring the airtightness between the inside of the instrument guide 3 and the surgical chamber inside the patient's body.

[0027] The exhaust valve 30 includes a valve core 33, which can be found in some embodiments. Figure 2 , Figure 4 and Figure 5 The mounting part 311 is located near the end of the tubular part 312. An exhaust port 31111 is provided on the side wall 3111. The valve core 33 is disposed in the exhaust port 31111 and can reciprocate within the exhaust port 31111 along the wall thickness direction of the side wall 3111 to open or seal the exhaust port 31111. When the exhaust valve 30 is in the open position, the exhaust port 31111 can connect the mounting cavity 3112 and the instrument channel in the tubular part 312 with the outside to form an exhaust channel.

[0028] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 4 The valve core 33 can be manually pressed and moved toward the inside of the guide tube 31 to switch the exhaust valve 30 from the closed position to the open position. In some embodiments, please refer to... Figure 7The valve core 33 includes an exhaust port sealing portion 331 and an air guide portion 332 connected to the outside of the exhaust port sealing portion 331. Here, "outer side" refers to the inward and outward direction relative to the mounting portion 311. The mounting cavity 3112 is the inner side of the mounting portion 311, and the outside is the outer side of the mounting portion 311. Therefore, the outer side of the exhaust port sealing portion 331 refers to the side of the exhaust port sealing portion 331 facing away from the mounting cavity 3112 and towards the outside. In the closed position, the exhaust port sealing portion 331 seals the exhaust port 31111. In the open position, the exhaust port sealing portion 331 separates from the exhaust port 31111. At this time, the air guide portion 332 connects the mounting cavity 3112 to the outside and, together with the exhaust port 31111, defines a portion of the exhaust passage. The exhaust valve 30 adopts a press-to-open structure, occupying little space and avoiding interference with the patient's body.

[0029] In some embodiments, please refer to Figure 3 and Figure 8 The exhaust port 31111 is a round hole opened on the side wall 3111 of the mounting part 311. Correspondingly, the valve core 33 is a plunger-shaped structure. The outer diameter of the part of the valve core 33 that constitutes the exhaust port sealing part 331 is larger than the radial dimension of the exhaust port 31111, so that the exhaust port sealing part 331 can block the exhaust port 31111 when the valve core 33 is in the closed position.

[0030] In some embodiments, to ensure the reliability of the valve core 33 sealing the exhaust port 31111, an annular groove 333 is provided between the exhaust port sealing part 331 and the air guide part 332. The exhaust valve 30 also includes a first sealing ring 34, which is installed on the exhaust valve 30 through the annular groove 333. In the closed position, the portion of the exhaust port sealing part 331 with a larger outer diameter than the air guide part 332 presses the first sealing ring 34 against the side wall 3111, thereby achieving reliable sealing of the exhaust port 31111.

[0031] In some embodiments, please refer to Figure 7The air guide portion 332 has a groove 3321. Along the wall thickness direction of the side wall 3111 (i.e., the inward and outward direction of the mounting portion 311), the length of the groove 3321 is greater than the wall thickness of the side wall 3111. When the exhaust valve 30 is in the open position, one end of the groove 3321 is located inside the side wall 3111, and the other end is located outside the side wall 3111. The groove 3321 and the exhaust port 31111 together define a portion of the exhaust passage, connecting the mounting cavity 3112 to the outside. In some embodiments, four grooves 3321 are evenly provided along the circumference of the valve core 33. The portion between two adjacent grooves 3321 engages with the hole wall of the exhaust port 31111 to guide the movement of the valve core 33. In other embodiments, the number of grooves 3321 can be adaptively increased or decreased, such as three, two, or even only one groove 3321. The number of grooves 3321 can also be greater than four, such as five. Of course, the groove 3321 may not be provided on the air guide 332. If the exhaust port 31111 is a round hole and the air guide 332 is a cylindrical structure, the diameter of the air guide 332 must be smaller than the exhaust port 31111 so that when the exhaust valve 30 is in the open position, the gap between the air guide 332 and the exhaust port 31111 can connect the mounting cavity 3112 to the outside. Alternatively, the exhaust port 31111 can be designed as a round hole and the air guide 332 as a prism structure to form an exhaust channel within the instrument guide 3 when the exhaust valve 30 is in the open position.

[0032] In the closed position, the end of the air guide 332 away from the exhaust port sealing part 331 protrudes outward from the side wall 3111. The operator can drive the valve core 33 from the closed position to the open position by pressing this end face of the air guide 332. Considering that the operator presses the valve core 33 to exhaust air, the object may block the outer opening of the exhaust port 31111. For example, when pressing the valve core 33 with a finger, the fingertip may block the exhaust port 31111. To ensure smooth exhaust, in some embodiments, please refer to... Figure 3 A support structure 3113 is provided around the exhaust port 31111 on the outer surface of the side wall 3111. The support structure 3113 protrudes outward relative to the side wall 3111. The support structure 3113 has a notch 3114. The notch 3114 passes through the support structure 3113 radially along the exhaust port 31111, forming a channel through which smoke and other substances can pass. In the open position, a part of the air guide 332 communicates with the outside through the notch 3114.

[0033] To ensure stable and smooth operation of the exhaust valve 30, the exhaust valve 30 also includes a guide member 35 disposed within the mounting portion 311. The guide member 35 guides the movement of the valve core 33. In some embodiments, please refer to... Figure 5 and Figure 6To accommodate the guide member 35, the mounting cavity 3112 has two upright walls 36 positioned on either side of the exhaust port 31111. These two upright walls 36 are connected to the side wall 3111, either integrally formed or mechanically assembled. Slots 361 are provided on opposite sides of the two upright walls 36, extending along the length of the guide tube 31. To define the installation position of the guide member 35 and ensure alignment between the guide member 35 and the exhaust port 31111, the end of the slot 361 furthest from the tubular portion 312 has a stepped surface.

[0034] Please refer to the structure of guide component 35. Figure 9 The guide member 35 includes a plate 351 with a guide groove 352 extending through it along its thickness. Lugs 353 are located at both ends of the plate 351. During installation, the two ends of the plate 351 are inserted into slots 361 on the two vertical walls 36. The guide member 35 is then pressed in along the length of the slots 361. Once the lugs 353 are pressed against the stepped surfaces at the ends of the slots 361, the guide member 35 is properly installed in the mounting portion 311. To ensure stable and reliable installation of the guide member 35 on the two vertical walls 36, please refer to... Figure 9 A raised rib 354 is provided on the side of the plate 351. The raised rib 354 has a guide slope 3541. The plate 351 is press-fitted with the slot 361 through the raised rib 354, so that the guide member 35 can be stably and reliably installed on the two vertical walls 36. The guide slope 3541 makes the raised rib 354 a wedge-shaped structure, which facilitates the guide member 35 to enter the slot 361.

[0035] Please refer to Figure 7 The valve core 33 has a guide section 334, which is located on the side opposite to the air guide section 332 of the exhaust port sealing part 331. That is, the guide section 334 and the air guide section 332 are located on both sides of the exhaust port sealing part 331. In the assembled state, the guide section 334 is inserted into the guide groove 352 of the guide member 35, and the guide member 35 guides the movement of the valve core 33.

[0036] In some embodiments, please refer to Figure 7 The guide section 334 has a groove 3341, and one end of the groove 3341 facing the exhaust port sealing part 331 has a limiting wall 33411. Correspondingly, the groove wall of the guide groove 352 has a protrusion 355. The protrusion 355 acts as a limiting member and is fitted into the groove 3341. The contact between the protrusion 355 and the limiting wall 33411 can limit the extreme position of the valve core 33 when switching to the open position. The limiting member formed by the protrusion 355 and the guide member 35 are integrally formed. In some other embodiments, the limiting member and the guide member 35 can be two separate parts. Of course, only the guide member 35 or only the limiting member can be provided.

[0037] In some embodiments, the exhaust valve 30 further includes a spring 37 fitted onto the guide section 334. When the exhaust valve 30 is in the open position, the spring 37 is compressed, so that after the operator removes the pressure applied to the valve core 33, the spring 37 can drive the valve core 33 to switch from the open position to the closed position. Considering the need to reliably seal the exhaust port 31111 when the exhaust valve 30 is in the closed position, the spring 37 remains compressed, allowing the spring 37 to apply a clamping force to the valve core 33 against the side wall 3111. Those skilled in the art will understand that the compression of the spring 37 when the exhaust valve 30 is in the open position is greater than the compression when the exhaust valve 30 is in the closed position.

[0038] The instrument seal 322 has a modular structure, allowing it to be assembled independently for airtightness testing. This eliminates the need to assemble the entire instrument guide 3 before testing, reducing rework costs due to airtightness failures. In some embodiments, please refer to... Figure 4 , Figure 8 , Figure 10 and Figure 11 The instrument seal 322 includes an air-blocking bracket 3221 with multiple bracket openings 32211 for surgical instruments to pass through. When no surgical instruments are inserted, the bracket openings 32211 need to be sealed. Therefore, the instrument seal 322 also includes an air-blocking plate 3222, which is movably mounted on the air-blocking bracket 3221. The air-blocking plate 3222 acts as a door, opening when a surgical instrument passes through the bracket opening 32211 and closing to seal the bracket opening 32211 when no surgical instrument passes through it.

[0039] To enable the air baffle 3222 to be movably mounted on the air baffle bracket 3221, in some embodiments, please refer to... Figure 12 The gas baffle 3222 includes a pivot 32221, which is pivotally connected to the distal end of the gas baffle 3221, allowing the gas baffle 3222 to swing relative to the gas baffle 3221. To ensure that the gas baffle 3222 reliably seals the stent opening 32211 when no surgical instruments are inserted, the instrument seal 322 also includes a biasing member 3223, which applies force to the gas baffle 3222, biasing it to a position that closes the stent opening 32211.

[0040] In some embodiments, please refer to Figure 11The distal surface of the gas-blocking bracket 3221 is provided with paired and spaced ear plates 32212 corresponding to each bracket opening 32211. At least one of the paired ear plates 32212 is provided with a limiting part 32213. The two ends of the pivot shaft 32221 are pivotally connected to the ear plates 32212 respectively. The biasing member 3223 is a torsion spring 3224, which is sleeved on the pivot shaft 32221. One end of the torsion spring 3224 is supported on the limiting part 32213, and the other end abuts against the gas-blocking plate 3222. The torsion spring 3224 applies force to the gas-blocking plate 3222 with the gas-blocking bracket 3221 as the fulcrum, so as to bias the gas-blocking plate 3222 to the position of closing the bracket opening 32211. When it is necessary to insert surgical instruments, the surgical instruments push open the gas-blocking plate 3222, forming an instrument channel in the instrument guide 3.

[0041] Please refer to the structure of instrument guide 321, i.e., guide cover. Figure 8 and Figure 13 The instrument guide 321 has a number of guide channels 3211 corresponding to the number of support openings 32211. The shape of the instrument guide 321 is adapted to the shape of the mounting part 311, that is, the proximal cross-sectional dimension is large and the distal cross-sectional dimension is small. Thus, each guide channel 3211 also has a large proximal port and a small distal port, which can guide the surgical instrument into the instrument channel.

[0042] The instrument guide 321 is disposed on the proximal side of the instrument seal 322 and is sealed to the mounting portion 311 by a second sealing ring 38. The distal end of the instrument guide 321 has an extension 3212, and the distal port of each guide channel 3211 is located at the distal end of the extension 3212. (Please refer to...) Figure 8 A mating cavity 32214 is formed at the proximal end of the gas-blocking bracket 3221. Each bracket opening 32211 is located at the bottom of the mating cavity 32214. An extension 3212 extends into the mating cavity 32214 and is fixed to the gas-blocking bracket 3221, thus reducing the overall length of the instrument guide 3. To ensure a sealed connection between each guide channel 3211 and the corresponding bracket opening 32211, a sealing gasket 39 is provided inside the mating cavity 32214. The sealing gasket 39 has a communication port that connects the guide channel 3211 to the corresponding bracket opening 32211.

[0043] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A device guide, characterized in that, include: A guide tube includes a mounting portion and a tubular portion, wherein the mounting portion has a mounting cavity that communicates with the cavity of the tubular portion; and A sealing assembly is disposed within the mounting portion, the sealing assembly comprising an instrument guide and a modular instrument seal engaging with the instrument guide; The instrument guide is capable of forming multiple instrument channels for surgical instruments to pass through, and the instrument channels are defined by the instrument guide, the instrument seal and the tubular portion; The instrument guide also includes an exhaust valve disposed on the side wall of the mounting portion. The exhaust valve is switchable between an open position and a closed position. In the open position, an exhaust channel is formed within the instrument guide, and in the closed position, the exhaust channel is closed.

2. The instrument guide as described in claim 1, characterized in that, The mounting portion is located near the end of the tubular portion, and an exhaust port is provided on the side wall. The exhaust valve is movably disposed on the exhaust port to seal or open the exhaust port. The exhaust port can connect the mounting cavity and the instrument channel in the tubular portion with the outside to form the exhaust channel.

3. The instrument guide as described in claim 1, characterized in that, The vent valve can be manually pressed toward the inside of the guide tube to switch from the closed position to the open position.

4. The instrument guide as described in claim 3, characterized in that, The exhaust valve includes an exhaust port sealing part and an air guide part connected to the outside of the exhaust port sealing part; In the closed position, the exhaust port sealing portion seals the exhaust port; In the open position, the exhaust port sealing part is separated from the exhaust port, the air guide part connects the mounting cavity to the outside, and together with the exhaust port, defines a part of the exhaust passage.

5. The instrument guide as described in claim 4, characterized in that, A support structure is provided around the exhaust port on the outer surface of the sidewall. The support structure has a notch, and in the open position, a portion of the air guide is connected to the outside through the notch.

6. The instrument guide as described in claim 4, characterized in that, The instrument guide also includes: A guide member disposed within the mounting portion for guiding the movement of the exhaust valve; and / or a limiting member disposed within the mounting portion for limiting the stroke of the exhaust valve.

7. The instrument guide as claimed in claim 1, characterized in that, The modular instrument seal includes: An air-blocking stent having a stent opening for surgical instruments to pass through; A baffle plate includes a pivot shaft pivotally connected to a distal end of the baffle bracket to cause the baffle plate to rotate relative to the baffle bracket; and A biasing element is used to bias the air baffle plate to a position that closes the opening of the bracket.

8. The instrument guide as described in claim 7, characterized in that, The distal surface of the air-blocking bracket is provided with a pair of spaced-apart ear plates, and a limiting part is provided on the ear plates; Both ends of the pivot shaft are pivotally connected to the ear plate; The biasing element is a torsion spring, which is sleeved on the pivot shaft. One end of the torsion spring is supported on the limiting part, and the other end abuts against the air baffle plate to bias the air baffle plate to the position that closes the opening of the bracket.

9. The instrument guide as claimed in claim 1, characterized in that, The instrument seal includes an air-blocking bracket with a mating cavity. The instrument guide includes an extension that extends into the mating cavity and is fixed to the air-blocking bracket.

10. A surgical port assembly, characterized in that, The device includes an instrument guide, a cannula seal, and a cannula as described in any one of claims 1-9, the cannula being used to receive the instrument guide, and the cannula seal being used to form a seal between the cannula and the instrument guide.

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