Intraluminal assist device and intraluminal foreign body retrieval system

Abstract

The utility model provides a kind of intracavity auxiliary device and intracavity foreign body extraction system, wherein, intracavity auxiliary device includes: sheath pipe;Guide channel, guide channel is at least partially set in sheath pipe, and axial through the proximal end and the distal end of sheath pipe, for guiding foreign body extraction device to enter biological tissue cavity;Housing, located in the proximal end of sheath pipe;And valve part, at least partially housed in housing, for selectively opening or plugging guide channel.The above-mentioned intracavity auxiliary device can safely and effectively assist foreign body extraction device to extract foreign body in vivo.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular relates to an intracavitary auxiliary device and an intracavitary foreign body removal system. Background Technology

[0002] Medical devices implanted to treat valvular heart disease carry the risk of breakage or the formation of vegetations around them. If this occurs, a foreign body will float in the bloodstream. If the foreign body is not removed promptly and effectively, it can damage vital organs and even endanger the patient's life. For example, a foreign body may cause arrhythmias, heart rupture, myocardial thrombosis, pulmonary embolism, endocarditis, and other risk events.

[0003] One existing minimally invasive surgical treatment for removing foreign objects from the heart involves making a small incision at the apex of the heart while the heart is still beating, and using a foreign body removal device (such as a surgical robotic arm or foreign body removal forceps) to enter the heart chamber and remove the foreign object. This method is prone to problems such as significant blood leakage and air intake during the removal process.

[0004] Therefore, there is an urgent need for a safe and effective intracavitary auxiliary device to assist foreign body removal devices in extracting foreign bodies from body cavities. Utility Model Content

[0005] This invention provides an intracavitary auxiliary device and an intracavitary foreign body removal system, which can safely and effectively remove foreign bodies compared with the prior art.

[0006] In a first aspect, this utility model provides an intracavitary auxiliary device, the intracavitary auxiliary device comprising:

[0007] Sheath;

[0008] A guiding channel, at least partially disposed within the sheath and axially extending through the proximal and distal ends of the sheath, is used to guide the foreign body removal device into the tissue cavity of a biological body;

[0009] The outer shell, fitted onto the proximal end of the sheath; and

[0010] A valve, at least partially housed within the housing, is used to selectively open or close the guide channel.

[0011] Secondly, this utility model provides an intracavitary foreign body removal system for removing foreign bodies from the cavities of biological tissues, including the aforementioned intracavitary auxiliary device and foreign body removal device, wherein the foreign body removal device enters and exits the biological tissue cavity through the intracavitary auxiliary device.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The endocavitary auxiliary device includes a sheath, a guide channel at least partially disposed on the sheath and axially extending through the sheath, and a valve capable of selectively opening or closing the guide channel. The valve prevents excessive blood leakage or air intake during foreign body removal, improving the safety and reliability of the endocavitary auxiliary device during surgery, enabling the safe and rapid removal of various foreign bodies from the body's tissue cavities. Furthermore, this invention features a shell at the proximal end of the sheath, with the shell at least partially housing the valve, facilitating operator handling and gripping, thus increasing the convenience and operability of the surgery.

[0014] Attached Figures and Their Descriptions

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate some embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall system for removing foreign objects from the cavity.

[0018] Figure 2 This is a schematic diagram of the overall structure of the intracavitary auxiliary device in the intracavitary foreign body removal system in some embodiments.

[0019] Figure 3 This is an exploded view of the intracavitary auxiliary device in an intracavitary foreign body removal system in some embodiments.

[0020] Figure 4 This is a cross-sectional structural diagram of an intracavitary auxiliary device in an intracavitary foreign body removal system in some embodiments.

[0021] Figure 5 This is a schematic diagram of the overall structure of the branch branch in the cavity auxiliary device in some embodiments.

[0022] Figure 6 This is a schematic diagram of the branch pipe in the branch section of the cavity auxiliary device in some embodiments.

[0023] Figure 7 This is a schematic diagram of the overall structure of the valve section in the cavity auxiliary device in some embodiments.

[0024] Figure 8 This is an exploded structural diagram of the valve section in the cavity auxiliary device in some embodiments.

[0025] Figure 9 This is a schematic diagram of the foreign matter storage section in the intracavitary auxiliary device in some embodiments.

[0026] Figure 10 This is a schematic diagram of an intracavitary auxiliary device entering with the expander in some embodiments.

[0027] Figure 11 This is a schematic diagram of the intracavitary auxiliary device entering and exiting the left ventricular dilator in some embodiments.

[0028] Figure 12 This is a schematic diagram of a foreign object removal clamp capturing a foreign object in some embodiments.

[0029] Figure 13 This is a schematic diagram of some embodiments where the foreign object is removed into the foreign object compartment and the foreign object removal forceps are completely withdrawn.

[0030] Figure 14 This is a schematic diagram illustrating the disassembly of the foreign object compartment from the internal auxiliary device in some embodiments. Detailed Implementation

[0031] For ease of description, in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device; the radial direction refers to the direction along the diameter or radius, which is perpendicular to the axial direction; and the circumferential direction refers to the circumferential direction around the central axis. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on certain embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] Throughout this specification, the terms "an embodiment," "an embodiment," "in another embodiment," or "in some embodiments" refer to including, in at least one embodiment, a specific reference element, structure, or feature related to that embodiment. Therefore, the phrases "in an embodiment," "in another embodiment," or "in some embodiments" appearing in different places throughout the specification do not necessarily all refer to the same embodiment. Furthermore, specific elements, structures, or features may be combined in one or more embodiments in any suitable manner.

[0034] See Figure 1 As shown, this utility model provides an intracavitary foreign body removal system 1 for convenient and minimally invasive removal of foreign bodies existing in the cavities of biological tissues (such as the atrial and ventricular cavities of the heart, vascular cavities, esophageal cavities, etc.). The intracavitary foreign body removal system 1 mainly includes an intracavitary auxiliary device 10 and a foreign body removal device 20 (such as a surgical robotic arm or foreign body removal forceps). The intracavitary auxiliary device 10 provides a channel for other instruments (e.g., external medical imaging instruments such as ultrasound probes, detection instruments such as blood pressure monitors, blood sampling instruments, etc.) and / or the foreign body removal device 20 to enter the biological cavity through the channel established by the intracavitary auxiliary device 10, thereby removing the foreign body S (refer to...) from the heart chamber. Figure 12 and Figure 13 It is removed from the body. The organism mentioned above can be a human or another animal.

[0035] Combination Figures 2-4 As shown, in some embodiments, the intracavitary auxiliary device 10 includes a sheath 11, a branch pipe 12, a valve section 13, a housing 14, a foreign matter storage section 15, and a guide channel 16 (e.g., Figure 4 (As shown). The sheath 11 provides a passage for entry into the body. The proximal end of the sheath 11 connects to the distal end of the branch tube 12, which in turn connects to the distal end of the valve section 13. The branch tube 12 provides a passage for other auxiliary instruments to enter the guide channel 16. The valve section 13 prevents blood leakage and air intake when instruments enter or exit the channel. The outer shell 14 is fitted over a portion of the proximal end of the sheath 11, most of the branch tube 12, and most of the valve section 13. The outer shell 14 secures the relative positions of the components and provides a gripping space, improving the ease and maneuverability of the surgery. The foreign body storage section 15 typically includes a transparent or semi-transparent compartment for storing the foreign body S during surgery and for observing its condition after removal. The guide channel 16, composed of the axial channels of the sheath 11, branch tube 12, and valve section 13, guides the foreign body removal device 20 into the tissue cavity of the body. In this embodiment, when the guide channel 16 is in the conducting state, the guide channel 16 passes through the sheath tube 11, the branch pipe 12 and the valve section 13 along the axial direction, and is connected to the foreign matter storage section 15.

[0036] In some embodiments, the sheath 11 comprises a three-layer structure, consisting of an inner membrane, a reinforcing tube disposed on the inner membrane, and an outer membrane disposed on the reinforcing tube, from the inside out. Specifically, the inner membrane is a flexible tube made of a flexible material such as polytetrafluoroethylene (PTFE), the reinforcing tube can be a metal braided mesh structure woven from materials such as stainless steel wire, tungsten wire, or nickel-titanium wire, or a spiral structure wound from materials such as stainless steel wire, tungsten wire, or nickel-titanium wire, and the outer membrane can be made of materials such as block polyetheramide elastomer (Pebax). The inner membrane, reinforcing tube, and outer membrane can be thermoformed together to form at least one axially through-hole.

[0037] It is understandable that in other embodiments, the sheath 11 may only include an inner membrane and / or an outer membrane, or the sheath 11 may be made of a composite of a PTFE inner membrane and two Pebax outer membranes. Of course, the inner membrane, reinforcing tube, and outer membrane may also be made of other materials. Furthermore, in order to accurately determine whether the distal end of the sheath 11 has reached the designated position, a developing element may be provided at the distal end of the sheath 11, or the distal portion of the sheath 11 may be made of a developing material, such as platinum, gold, tantalum, or other developing materials.

[0038] Please combine Figures 4-6 As shown, in some embodiments, the branch pipe 12 is connected between the sheath 11 and the valve section 13. The branch pipe 12 includes a main pipe body 121 and at least one branch pipe body 122. The main pipe body 121 is sealed between the sheath 11 and the valve section 13. A guide channel 16 is also disposed within the main pipe body 121 and extends axially through the proximal and distal ends of the main pipe body 121. The main pipe body 121 is housed within the outer casing 14, and at least one branch pipe body 122 extends obliquely from the side wall of the main pipe body 121.

[0039] At least one branch tube 122 has a branch channel 122a for inserting other auxiliary instruments and communicating with the guide channel 16. A sealing kit 123 is provided on the branch tube 122. The sealing kit 123 has a communicating state, communicating with the branch channel 122a of the branch tube 122, and a closed state, i.e., a sealed state, isolating it from the branch channel 122a of the branch tube 122. The sealing kit 123 can adopt a three-way valve structure as used in the prior art, capable of sealing the branch tube 122. The branch channel 122a of the branch tube 122 communicates with the inner lumen of the sheath 11, and the branch tube 122 extends beyond the outer casing 14, providing a channel for other auxiliary instruments that need to enter the body to enter the guide channel 16 and the sheath 11.

[0040] Understandably, when other instruments want to enter the biological tissue cavity via the branch tube 12, they pass sequentially through the sealing kit 123, the branch tube body 122, and the distal end of the main tube body 121, and then through the sheath tube 11 to reach the biological tissue cavity. Due to the presence of the sealing kit 123, other instruments can enter and exit the lumen channel formed by the cavity auxiliary device 10, and the portion of the instrument inserted in the sealing kit 123 can be press-fitted to form a seal.

[0041] Please combine Figure 4 , Figure 7 and Figure 8As shown, in some embodiments, the valve portion 13 includes a valve body 132, a valve core 134, and a valve stem 136. The valve body 132 is partially housed within the housing 14 and its distal end is sealed to the proximal end of the sheath 11, with the proximal end connected to the distal end of the foreign body storage portion 15. The valve body 132 is generally cross-shaped, having an axially penetrating axial hole 132a and a valve core hole 132b radially (radially along the entire cavity of the auxiliary device 10) intersecting the axial hole 132a. The axial hole 132a communicates with the inner cavity of the sheath 11 and can be selectively opened or blocked by the valve core 134, allowing instruments required for surgical procedures (e.g., the foreign body removal device 20) to pass through. The valve core hole 132b is used to accommodate the valve core 134. The proximal end of the valve body 132 is threaded, connecting to the distal end of the foreign body storage portion 15 via the thread. The valve core 134 is generally cylindrical. At least a portion of the valve core 134 is accommodated within the axial hole 132a of the valve body 132, and the portion of the valve core 134 located within the axial hole 132a has a through hole 134a. The through hole 134a extends through the valve core 134 axially along the axial hole 132a. When the through hole 134a is aligned and connected with the axial hole 132a of the valve body 132, instruments (such as the foreign object removal device 20) can pass through. A rectangular slot 134b is provided on one side of the valve core 134 radially outward along the axial hole 132a. The rectangular slot 134b is used to accommodate and connect the valve stem 136. In this embodiment, the rectangular slot 134b extends radially through the entire valve core 134 and is located at the center of the valve core 134. A portion of the valve stem 136 is disposed outside the housing 14, and the other portion passes through the housing 14 and connects to the valve core 134. The valve stem 136 is used to drive the valve core 134 to rotate, thereby controlling the through hole 134a to be connected to the axial hole 132a, or causing the through hole 134a to be rotated by the valve core 134 until it is no longer connected to the axial hole 132a, thereby causing the valve core 134 to block the axial hole 132a. Optionally, the portion of the valve stem 136 disposed outside the housing 14 is configured as an operating wrench 136a to provide a better grip and less effort when rotating the valve stem 136. The part connecting the valve stem 136 and the valve core 134 is configured as a rectangular connecting block 136b. The rectangular connecting block 136b is at least partially inserted into the rectangular slot 134b. The outer peripheral wall of the rectangular connecting block 136b and the rectangular slot 134b are anti-rotationally engaged, so that the rectangular connecting block 136b and the valve core 134 can transmit torque, so as to better insert into the rectangular slot 134b of the valve core 134 to drive the valve core 134 to move, thereby controlling the through hole 134a and the axial hole 132a to be connected or to make the valve core 134 block the axial hole 132a.

[0042] like Figure 3As shown, in some embodiments, the outer shell 14 includes opposing first shell 141 and second shell 142 that can be connected together. The first shell 141 and the second shell 142 can be snapped or glued together to form a hollow receiving cavity that extends axially through the outer shell 14. It can be understood that the outer shell 14 is provided at the proximal end of the sheath 11, and the outer shell 14 at least partially houses the valve portion 13 to facilitate operation and gripping by the operator, thereby increasing the convenience and operability of the surgery.

[0043] Please combine Figure 4 and Figure 9 As shown, in some embodiments, the foreign matter storage section 15 is sealed to the proximal end of the housing 14 and the proximal end of the valve section 13. The foreign matter storage section 15 includes a foreign matter compartment 152 and a sealing assembly 154, wherein the foreign matter compartment 152 is connected to the proximal end of the housing 14 and the proximal end of the valve section 13, and communicates with the axial hole 132a.

[0044] The foreign body compartment 152 is configured as a roughly cylindrical cavity structure, with a receiving cavity 152a extending axially through the entire cavity and communicating with the guide channel 16. The entire compartment is transparent or semi-transparent, used to store the foreign body S captured by the foreign body removal device 20 and to facilitate observation of the state of the foreign body S removed during the procedure. The foreign body storage section 15 can be made of polymer materials such as acrylonitrile (A)-butadiene (B)-styrene (S) terpolymer (ABS), polypropylene (PP), polycarbonate (PC), or polyethylene (PE). The axial length of the foreign body compartment 152 is between 48mm and 50mm, and the inner diameter is between 15mm and 16mm.

[0045] The sealing assembly 154 is located at the proximal end of the foreign matter chamber 152. The foreign matter removal device 20 can pass through the sealing assembly 154 and enter the receiving cavity 152a. The sealing assembly 154 and the foreign matter removal device 20 are partially inserted into the sealing assembly 154 with an interference fit. The sealing assembly 154 is used to seal the foreign matter chamber 152.

[0046] Optionally, the sealing assembly 154 includes an exhaust sealing valve 154a, a sealing gasket 154b, and a nut 154c. The exhaust sealing valve 154a is connected to the proximal end of the foreign body compartment 152 and adopts a three-way valve structure as used in the prior art. The sealing gasket 154b is an irregularly shaped silicone gasket with a cross-shaped cut in the center. The nut 154c has a perforation in the center and an internal thread on its inner wall that matches the external thread provided at the proximal end of the foreign body compartment 152, so as to achieve a tight connection with the foreign body compartment 152 and to press the sealing gasket 154b between the foreign body compartment 152 and the nut 154c to achieve a sealing effect. By setting the exhaust sealing valve 154a and the sealing gasket 154b, an insertion channel can be provided for the surgical instruments, and the sealing and exhaust of the intracavitary auxiliary device 10 can be achieved by setting the exhaust sealing valve 154a and the sealing gasket 154b.

[0047] Understandably, when the intracavitary foreign body removal system 1 is in use, the foreign body removal device 20 (e.g., foreign body removal forceps) can enter the receiving cavity 152a of the foreign body storage section 15. After the operator controls the axial hole 132a to open, the foreign body removal device 20 can enter the sheath 11 along the axial hole 132a, then extend from the distal end of the sheath 11 to grasp the foreign body S and withdraw, and then release the foreign body S into the receiving cavity 152a of the foreign body storage section 15. After the entire foreign body removal device 20 is withdrawn from the intracavitary auxiliary device 10, the foreign body storage section 15 containing the foreign body S can be disassembled and the foreign body S can be centrally processed. If the foreign body removal device 20 needs to re-enter the body to grasp the foreign body, a new foreign body storage section 15 can be replaced, thus enabling multiple uses. In this way, by setting up the foreign body storage section 15, the foreign body S can be captured multiple times without completely removing the foreign body removal device 20. This reduces the number of times the foreign body removal device 20 enters and exits the medical cavity auxiliary device, simplifies the surgical procedure, and improves surgical efficiency.

[0048] The following is combined Figures 10-14 As shown, taking the foreign body removal device 20 as an example of a foreign body removal forceps, the operation method of how the intracavitary foreign body removal system 1 removes a foreign body S from the heart of a living organism through the cooperation of the intracavitary auxiliary device 10 and the foreign body removal device 20 is explained. Of course, the intracavitary foreign body removal system 1 and its operation method can also be applied to other organs or tissues, such as the brain, esophagus, blood vessels, etc. Specifically, the specific steps of using the intracavitary foreign body removal system 1 in some embodiments of this utility model include:

[0049] Step S1: Please refer to Figure 10The procedure involves puncturing the heart apex. After puncture, the dilator 16 is inserted through the nut 154c at the proximal end of the foreign body compartment 152, passing sequentially through the receiving cavity 152a, the axial hole 132a, and the inner lumen of the sheath 11, and exiting from the distal opening of the sheath 11. The dilator 16, along with the sheath 11, is then inserted into the left ventricle (LV) from the purse-string position at the heart apex. The distal end of the sheath 11 is inserted into the ventricle only 6mm-9mm to avoid traction on the chordae tendineae and to allow sufficient space for the foreign body removal forceps 20. During this process, the outer wall of the dilator 16 fits snugly against the inner wall of the sheath 11, and the sealing gasket 154b is tightly fitted against the dilator 16, achieving a good sealing effect and significantly reducing blood leakage and air intake.

[0050] Step S2: Please refer to Figure 11 The expander 16 is slowly withdrawn. When the expander 16 is withdrawn from the axial hole 132a, the valve core 134 is rotated by operating the wrench 136a, so that the through hole 134a is misaligned with the axial hole 132a. That is, the valve core 134 blocks the axial hole 132a, thereby closing the axial hole 132a to prevent blood leakage and air intake. Then the expander 16 is completely removed.

[0051] Step S3: Please refer to Figure 12 The foreign object removal device 20 (i.e., foreign object removal clamp) is inserted into the nut 154c at the near end of the foreign object storage section 15 and pushed towards the far end. When the foreign object removal clamp 20 reaches the axial hole 132a, the valve core 134 is rotated by rotating the operating wrench 136a, so that the through hole 134a is connected to the axial hole 132a, thereby opening the axial hole 132a. During this process, the sealing gasket 154b of the sealing assembly 154 fits tightly with the foreign object removal clamp 20, thereby achieving a good sealing effect and greatly reducing blood leakage and air intake.

[0052] Step S4: Please refer to Figure 13 As shown, after the foreign body retrieval forceps 20 extends from the distal end of the sheath 11 into the ventricle and successfully captures the foreign body S, the forceps 20 is withdrawn back into the foreign body chamber 152, and the foreign body is released within the chamber. When the forceps 20 withdraws from the axial hole 132a, the valve core 134 is rotated by rotating the wrench 136a, isolating the through hole 134a from the axial hole 132a. The valve core 134 seals the axial hole 132a to prevent blood leakage and air intake. After releasing the foreign body, the foreign body chamber 152 tilts slightly downwards to prevent backflow of the foreign body.

[0053] If the foreign object S is not completely removed, the foreign object removal forceps 20 can be extended again from the foreign object chamber 152 into the ventricle to achieve secondary capture of the foreign object, and then the foreign object S can be temporarily stored in the foreign object chamber 152. The foreign object chamber 152 can also be disassembled and replaced. It should be noted that step S5 may be optional depending on the capture status of the foreign object S, and step S5 can be repeated once or multiple times depending on the capture status of the foreign object S.

[0054] Step S5: Please refer to Figure 14 As shown, after the foreign object S is removed, the foreign object removal forceps 20 are slowly withdrawn. When the forceps 20 is withdrawn from the axial hole 132a, the valve core 134 is rotated by rotating the wrench 136a, isolating the through hole 134a from the axial hole 132a. The valve core 134 seals the axial hole 132a to prevent blood leakage and air intake. Finally, the intracavitary auxiliary device 10 is removed from the body.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

Claims

1. An intracavitary auxiliary device, characterized in that, The intracavitary auxiliary device includes: Sheath; A guiding channel, at least partially disposed within the sheath and axially extending through the proximal and distal ends of the sheath, is used to guide the foreign body removal device into the tissue cavity of a biological body; The outer casing is located near the proximal end of the sheath; and A valve, at least partially housed within the housing, is used to selectively open or close the guide channel.

2. The intracavitary auxiliary device according to claim 1, characterized in that, The valve section includes: A valve body, connected to the proximal end of the sheath and housed within the housing, the valve body having an axially penetrating axial bore and a radially extending valve core bore intersecting the axial bore, the axial bore being part of the guide channel; A valve core, housed within the valve core bore and having a through hole, the through hole being located within the axial bore and extending axially through the valve core; and The valve stem is connected to the valve core and has an operating wrench portion located outside the housing. The operating wrench is used to drive the valve core to rotate, so that the through hole is connected to or isolated from the axial hole, so as to achieve communication with or block the guide channel.

3. The intracavitary auxiliary device according to claim 2, characterized in that, The valve core has a cylindrical structure.

4. The intracavitary auxiliary device according to claim 2, characterized in that, The valve core and the valve stem are connected by a rectangular connecting block and a rectangular slot.

5. The intracavitary auxiliary device according to claim 1, characterized in that, It also includes a branch pipe, which connects the sheath and the valve section, and is used to provide access for other instruments to enter the guide channel.

6. The intracavitary auxiliary device according to claim 5, characterized in that, The branch pipe includes: The main body is sealed between the sheath and the valve section, and the guide channel also has a portion opened in the main body and extends axially through the proximal and distal ends of the main body; At least one branch tube body, each of the branch tube bodies having a branch channel communicating with the guide channel, and a sealing kit provided on the branch tube body for sealing the branch channel.

7. The intracavitary auxiliary device according to claim 1, characterized in that, Also includes: The foreign object storage section is sealed to the proximal end of the valve section and has a receiving cavity along the axial direction that can communicate with the guide channel. The receiving cavity is used to store the foreign object captured by the foreign object removal device.

8. The intracavitary auxiliary device according to claim 7, characterized in that, The foreign matter storage section is detachably connected to the valve section.

9. The intracavitary auxiliary device according to claim 7 or 8, characterized in that, The foreign matter storage unit includes: A foreign object compartment is located near the valve section, and the receiving cavity is located within the foreign object compartment; and A sealing assembly is located at the proximal end of the foreign matter compartment, the sealing assembly being used to seal the foreign matter compartment.

10. An intracavitary foreign body removal system for removing foreign bodies from the cavities of a biological tissue, characterized in that, Includes the intracavitary auxiliary device and foreign body removal device as described in any one of claims 1-9, wherein the foreign body removal device enters and exits the biological tissue cavity through the intracavitary auxiliary device.

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