Multi-lumen introducer sheath

Abstract

This invention provides a multi-cavity guide sheath, comprising: a guide sheath tube and a handle connector; the guide sheath tube has at least two cavities: a first cavity and a second cavity; the handle connector is connected to the proximal end of the guide sheath tube. The multi-cavity guide sheath of this invention solves the problem in the prior art where the guide sheath has only one channel, making it unable to accommodate multiple instruments, by providing multiple cavities within the guide sheath tube.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multi-cavity guide sheath. Background Technology

[0002] In real life, many people suffer from diseases such as kidney stones or ureteral stones. During the examination and treatment, staff need to create a channel in the patient's body to assist the endoscope and other instruments in entering the urinary tract. Therefore, a device that can create such a channel is needed.

[0003] The existing ureteral guiding sheath has only one channel. The specific working process is as follows: after the guide wire reaches the lesion location, the ureteral guiding sheath uses this channel to follow the guide wire to the lesion location. Finally, the ureteral guiding sheath is withdrawn, and an endoscope is inserted to perform the surgery.

[0004] Current technology does not allow for the sequential insertion of two instruments through the internal channel of the same ureteral guide sheath. With advancements in medical technology, providing only one instrument channel within the same ureter is no longer sufficient. For example, during kidney stone fragmentation, the continuous infusion of saline solution inevitably increases the pressure within the renal pelvis. Current methods for pressure measurement typically involve external measurement using sensors on an infusion pump. However, external monitoring of internal pressure is inherently prone to error, while internal pressure measurement is more accurate. But the internal pressure measurement catheter also requires the insertion of a ureteral guide sheath, and existing guide sheaths are single-lumen, which cannot meet the requirements for inserting a pressure measurement catheter. Summary of the Invention

[0005] This invention provides a multi-cavity guide sheath to solve the problem that existing guide sheaths have only one channel and cannot accommodate multiple instruments.

[0006] This invention provides a multi-cavity guide sheath, comprising: a guide sheath tube and a handle connector;

[0007] The guiding sheath has at least two cavities: a first cavity and a second cavity;

[0008] The handle connector is connected to the proximal end of the guide sheath.

[0009] Preferably, at least a portion of the cavity wall is shared with the guide sheath wall of the guide sheath.

[0010] At least a portion of the cavity wall is provided with a cavity slot along the cavity extension direction, the cavity slot penetrating both ends of the cavity, so that a component inserted into the cavity is detached from the guide sheath via the cavity slot.

[0011] Preferably, at least one of the cavities is provided with a cavity slot along the extension direction of the cavity, the cavity slot penetrating both ends of the cavity; the guide sheath is provided with a guide sheath slot in the same direction as the slot, the guide sheath slot penetrating both ends of the guide sheath, so that the component inserted into the cavity is sequentially detached from the guide sheath through the cavity slot and the guide sheath slot.

[0012] Preferably, the guide sheath slot corresponds one-to-one with the cavity slot, and the guide sheath slot is in the radial extension direction of the corresponding cavity slot.

[0013] Preferably, it further includes: an inner tube, the inner tube being disposed within the first cavity;

[0014] When at least a portion of the cavity wall at the distal end of the first cavity is shared with the guide sheath wall of the guide sheath, the distal end of the at least a portion of the cavity wall has a first cavity conical structure.

[0015] The distal end of the inner tube has an inner tube tapered structure;

[0016] The distal end of the first cavity is located at the distal end of the guiding sheath;

[0017] When the distal end of the inner tube is located at the distal end of the guide sheath, the edge of the conical structure of the inner tube is aligned with the edge of the conical structure of the first cavity. After the multi-cavity guide sheath reaches the designated position, the inner tube can be withdrawn. A filling conical structure is formed between the inner tube and the first cavity, and the conical structure of the inner tube has the same shape as the conical structure (sharp edge) of the guide sheath. During the process of the guide sheath entering the tissue, the distal end of the guide sheath contacts the tissue and is under pressure. After the two are assembled, they will relatively distribute some of the tissue and pressure to the surface of the inner tube, which is equivalent to reducing the contact area of ​​the sharp edge of the guide sheath with the tissue, thereby reducing the risk of tissue scratching.

[0018] Preferably, the inner diameter of the proximal end of the handle connector is larger than the outer diameter of the distal end of the handle connector. The larger inner diameter of the proximal end increases the operating space when multiple instruments are inserted, reducing or avoiding mutual interference between instruments.

[0019] Preferably, it further includes: an extension tube, the extension tube communicating with the proximal end of the cavity, the proximal end of the cavity being the end of the cavity near the handle connector; the extension tube facilitates the insertion of the instrument.

[0020] Preferably, it further includes: an insertion connector, which corresponds one-to-one with the extension tube;

[0021] The insertion connector connects to the proximal end of the extension tube, which is the end of the extension tube furthest from the cavity. This insertion interface facilitates instrument insertion.

[0022] Preferably, it further includes a locking connector configured to lock into the insertion connector. The locking connector can be used to lock the inner tube or instrument to the guide sheath after the inner tube or instrument has been inserted into place, preventing relative movement between the inner tube or instrument and the guide sheath. The locking connector is also used to slide the inner tube or instrument downwards to disengage it from the guide sheath when the cavity has a cavity slot facing downwards.

[0023] Preferably, the proximal edge of the handle connector is provided as an outwardly sloping rounded edge, which facilitates the insertion of the instrument and enhances its strength.

[0024] Preferably, the outer wall surface of the guide sheath is provided with a hydrophilic coating to provide lubrication during guide sheath intervention.

[0025] Preferably, the outer wall of the guide sheath is provided with graduations, which makes it easy to check the length of the guide sheath insertion to determine whether the distal end of the guide sheath has reached the designated position.

[0026] The multi-cavity guide sheath provided by the present invention can provide two intervention channels simultaneously by setting at least two cavities inside the guide sheath, which solves the problem that the prior art only has one channel and cannot meet the needs of multiple instruments.

[0027] In one alternative embodiment of the present invention, by providing a slot in the cavity wall and / or the guide sheath wall, i.e., providing a slot on the side of the guide sheath, the instrument can be quickly detached from the slot after entering the designated position through the cavity of the guide sheath, without having to withdraw to the proximal end of the guide sheath, thus achieving a faster withdrawal speed. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a multi-cavity guiding sheath according to an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of a multi-cavity guiding sheath according to an embodiment of the present invention;

[0031] Figure 3This is a cross-sectional view of a guide sheath according to an embodiment of the present invention;

[0032] Figure 4 This is a cross-sectional view of the guide sheath according to another embodiment of the present invention;

[0033] Figure 5 This is a cross-sectional view of the guide sheath according to another embodiment of the present invention;

[0034] Figure 6 This is a side view of a multi-cavity guiding sheath according to a preferred embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the distal portion of a multi-cavity guiding sheath according to an embodiment of the present invention;

[0036] Figure 8 This is a front view of a multi-cavity guiding sheath according to a preferred embodiment of the present invention;

[0037] Figure 9 This is an exploded view of a multi-cavity guiding sheath according to a preferred embodiment of the present invention;

[0038] Figure 10 This is a completed assembly diagram of a multi-cavity guiding sheath according to a preferred embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of a multi-cavity guiding sheath according to a preferred embodiment of the present invention;

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Guiding sheath,

[0042] 11-First cavity,

[0043] 12-Second cavity,

[0044] 2-Handle connector,

[0045] 21-Rounded corner edges,

[0046] 3-Cavity slotting,

[0047] 4-Inner tube,

[0048] 5-Extension tube,

[0049] 6- Insert connector,

[0050] 7-Locking connector,

[0051] 8-Slide bar,

[0052] 9-Bend position. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] In the description of this invention, it should be understood that the terms "upper part", "lower part", "upper end", "lower end", "lower surface", "upper surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0055] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0056] In the description of this invention, "a plurality of" means multiple, such as two, three, four, etc., unless otherwise explicitly specified.

[0057] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" and other such terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0059] In one embodiment, a multi-cavity guide sheath is provided, comprising: a guide sheath tube 1 and a handle connector 2. Please refer to [reference needed]. Figure 1 The guide sheath has at least two cavities: a first cavity and a second cavity; the handle connector is connected to the proximal end of the guide sheath.

[0060] The procedure for performing kidney stone lithotripsy and stone removal surgery using the multi-chamber guiding sheath described in the above embodiments may include:

[0061] 1) A rigid ureteroscope is used to reach the kidney via the urethra using imaging;

[0062] 2) After the guide wire enters the kidney through the internal channel of the ureteroscope, the ureteroscope is withdrawn;

[0063] 3) The multi-cavity guiding sheath enters the kidney through the tip of the guidewire (first cavity);

[0064] 4) The pressure measuring catheter enters the kidney through the second cavity; (This adds another instrument into the body. Here, we take the pressure measuring catheter as an example. A temperature measuring catheter can also be used to monitor the internal pressure in real time, or a guide wire can be inserted to reserve a channel for subsequent instruments or other instruments that can enter the channel can be used).

[0065] 5) After the multi-lumen guiding sheath is withdrawn from the end of the guiding wire, the single-lumen guiding sheath (a combination of sheath and sheath tube structure) enters the kidney through the end of the guiding wire and is then withdrawn, leaving the sheath tube behind;

[0066] 6) A flexible ureteroscope is inserted into the kidney through the internal passage of the sheath;

[0067] 7) After the holmium laser probe passes through the internal channel of the ureteroscope to break up the stone, the holmium laser probe is withdrawn.

[0068] 8) After the stone retrieval basket is inserted into the kidney through the internal channel of the ureteroscope to remove the stones, all instruments are withdrawn, and the surgery is complete.

[0069] In one embodiment, at least a portion of the cavity may be shared with the guide sheath wall of the guide sheath. Please refer to [reference needed]. Figure 3 Taking an example that includes two cavities: a first cavity 11 and a second cavity 12. The cavities and the guiding sheath may also not share a common wall; please refer to [reference needed]. Figure 4 Alternatively, only a portion of the cavity may share the same wall as the guiding sheath. Please refer to [reference needed]. Figure 5 The size and shape of the cavity are not necessarily... Figure 3 , Figure 4 , Figure 5 The design can be customized according to actual needs.

[0070] In one embodiment, at least a portion of the cavity wall is shared with the guide sheath wall of the guide sheath, such as... Figure 3 As shown in the diagram, at least a portion of the cavity wall is provided with a cavity slot 3 along the cavity's extension direction. The cavity slot 3 extends through both ends of the cavity, allowing components inserted into the cavity to be detached from the guide sheath via the cavity slot. Please refer to [reference needed]. Figure 6 .

[0071] When it is necessary to remove components from the cavity via the cavity slot, the handle connector needs to be removed from the guide sheath because it is located near the end of the guide sheath. Alternatively, a handle connector slot can also be provided along the cavity extension direction, with the handle connector slot extending through both ends of the handle connector and connected to the cavity slot.

[0072] In different embodiments, the cavity slot can be provided on only one cavity, or the cavity slot can be provided on multiple cavities.

[0073] In one embodiment, when the cavity wall and the guide sheath wall of the guide sheath are not shared, such as... Figure 4 As shown in the figure. At least one cavity is provided with a cavity slot along the extension direction of the cavity, and the cavity slot passes through both ends of the cavity; the guide sheath is provided with a guide sheath slot in the same direction as the slot, and the guide sheath slot passes through both ends of the guide sheath, so that the component inserted into the cavity can be successively peeled out from the guide sheath through the cavity slot and the guide sheath slot.

[0074] When it is necessary to remove components from the cavity via the cavity slot, the handle connector needs to be removed from the guide sheath because it is located near the end of the guide sheath. Alternatively, a handle connector slot can also be provided along the cavity extension direction, with the handle connector slot extending through both ends of the handle connector and connected to the guide sheath slot.

[0075] In one embodiment, the guide sheath slot corresponds one-to-one with the cavity slot, and the guide sheath slot is in the radial extension direction of the corresponding cavity slot, which makes the peeling of the component simpler and more convenient.

[0076] In existing technologies, instruments inserted into the guide sheath must be retracted to the proximal end of the guide sheath before they can be withdrawn, which is relatively slow. The multi-lumen guide sheath of the above embodiment, by providing slots in the lumens and the sidewalls of the guide sheath, allows components inside the guide sheath to be peeled out of the guide sheath through the slots (i.e., from the sidewalls of the guide sheath), resulting in faster peeling speed and saving surgical time.

[0077] Taking the above surgical procedure as an example, the pressure measuring catheter can be detached from the side wall of the guide sheath. For multi-lumen guide sheaths without grooves on the side wall, after the pressure measuring catheter is inserted into the predetermined position through the lumen of the guide sheath, the multi-lumen guide sheath can be pushed to the proximal end of the pressure measuring catheter.

[0078] In one embodiment, the multi-cavity guiding sheath further includes: an inner tube 4, which passes through a first cavity; when at least a portion of the cavity wall at the distal end of the first cavity is shared with the guiding sheath wall of the guiding sheath tube, the distal end of at least a portion of the cavity wall has a first cavity conical structure; the distal end of the inner tube has an inner tube conical structure; the distal end of the first cavity is located at the distal end of the guiding sheath tube. When the distal end of the inner tube is located at the distal end of the guiding sheath tube, the edge of the inner tube conical structure is aligned with the edge of the first cavity conical structure. Please refer to [reference needed]. Figure 7 After the multi-cavity guide sheath reaches the designated position, the inner tube 4 can be withdrawn. A filling conical structure is formed between the inner tube 4 and the first cavity. The conical structure of the inner tube has the same shape as the conical structure (sharp edge) of the guide sheath. During the process of the guide sheath entering the tissue, the distal end of the guide sheath contacts the tissue and is under pressure. After the two are assembled, they will relatively distribute some of the tissue and pressure to the surface of the inner tube, which is equivalent to reducing the contact area between the sharp edge of the guide sheath tube and the tissue, thereby reducing the risk of tissue scratching.

[0079] In one embodiment, when the first cavity and the guiding sheath do not share a wall, the distal end of the first cavity has a first cavity conical structure; the distal end of the inner tube has an inner tube conical structure; and the distal end of the guiding sheath has a guiding sheath conical structure. When the distal end of the first cavity is located at the distal end of the guiding sheath, and the distal end of the inner tube is located at the distal end of the guiding sheath, the edges of the inner tube conical structure, the first cavity conical structure, and the guiding sheath conical structure are aligned.

[0080] In one embodiment, the inner diameter of the proximal end of the handle connector is larger than the outer diameter of the distal end of the handle connector. Please refer to [reference needed]. Figure 1 The large proximal inner diameter increases the operating space when multiple instruments are inserted, reducing or avoiding mutual interference between instruments.

[0081] In one embodiment, the multi-cavity guide sheath further includes an extension tube 5, which connects to the proximal end of the cavity, the proximal end of which is the end of the cavity near the handle connector; the extension tube facilitates the insertion of the instrument.

[0082] In different embodiments, the extension tube may be provided only in some cavities, or it may be provided in every cavity. Please refer to [reference needed]. Figure 1 The proximal end of the extension tube can extend beyond the proximal end of the handle connector; please refer to [reference needed]. Figure 1 Alternatively, the proximal end of the handle connector may not be extended; please refer to [reference needed]. Figure 8 An extension tube of the cavity located on the upper side.

[0083] In one embodiment, the multi-cavity guiding sheath further includes: an insertion connector 6, which corresponds one-to-one with the extension tube 5; the insertion connector 6 is connected to the proximal end of the extension tube 5, the proximal end of the extension tube being the end of the extension tube furthest from the cavity, please refer to... Figure 1 , Figure 2 , Figure 6The insertion interface design makes it easier to insert instruments.

[0084] In one embodiment, the multi-cavity guide sheath further includes a locking connector 7, configured to lock with the insertion connector 6. The locking connector 7 can be used to lock the inner tube or instrument to the guide sheath after the inner tube or instrument is inserted into place, preventing relative movement between the inner tube or instrument and the guide sheath.

[0085] In one embodiment, when the cavity is provided with a cavity slot and the cavity slot faces upward, the locking joint can also be used to drive the guide sheath tube to move downward, thereby causing the inner tube or instrument to be detached from the guide sheath through the cavity slot.

[0086] In one embodiment, it further includes: a slide bar 8, please refer to... Figure 9 The slide bar 8 mates with the locking connector 7, which is then screwed onto the female end of the handle connector 2 for secure fixing. The guide sheath has a specific bending angle (e.g., 45°) at a preset position starting from the proximal end (bending position 9). After assembly, the slide bar 7 is actually installed inside the handle connector 2, between the bending position and the proximal end of the guide sheath. Please refer to [reference needed]. Figure 10 During surgery, after the guide sheath reaches the lesion location, loosen the locking valve of the locking connector 7 and pull out the inner tube. Then insert the instrument (e.g., a pressure measuring catheter). After insertion, unscrew the male and female heads of the handle connector 2 and the locking connector 7. Use the slide bar 8 fixed on the locking connector 7 to slide downwards at a certain angle with the guide sheath, causing the inserted instrument (e.g., a pressure measuring catheter) to slide in the direction of the slot in the guide sheath. This allows the instrument to be quickly disassembled from the guide sheath through the slot.

[0087] In one embodiment, a portion of the proximal edge of the handle connector 2 is configured as an outwardly sloping rounded edge 21, please refer to [reference needed]. Figure 11 As shown in the figure, for ease of operation, the instrument or inner tube is usually inserted into the handle connector 2 at an angle. Setting the edge to be inclined outwards ensures that the angle between the instrument (such as a pressure measuring catheter) and the first cavity of the handle connector is consistent, making insertion smoother. In addition, setting the edge to a rounded edge enhances its strength and prevents the risk of breakage due to excessive force when tightening or loosening the locking connector.

[0088] In one embodiment, the outer wall surface of the guide sheath is provided with a hydrophilic coating to provide lubrication during guide sheath intervention.

[0089] In one embodiment, the outer wall of the guide sheath is provided with graduations, which makes it easy to check the length of the guide sheath insertion to determine whether the distal end of the guide sheath has reached the designated position.

[0090] In one embodiment, a developing component can be added to the material of the multi-cavity guide sheath, allowing the insertion depth of the guide sheath to be identified in the image. In another embodiment, the multi-cavity guide sheath can be made of a material that has appropriate hardness while also possessing a certain degree of flexibility.

[0091] The above embodiments use two cavities as an example. In different embodiments, three or more cavities may be provided, which will not be elaborated here.

[0092] In the description of this specification, the references to terms such as "an embodiment," "an example," "a specific implementation process," and "an example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-lumen introducer sheath, comprising: include: Guiding sheath and handle connector; The guiding sheath has at least two cavities: a first cavity and a second cavity; The handle connector is connected to the proximal end of the guide sheath. At least a portion of the cavity wall is shared with the guide sheath wall of the guide sheath. At least a portion of the cavity wall is provided with a cavity slot along the cavity extension direction, the cavity slot penetrating both ends of the cavity, so that a component inserted into the cavity is detached from the guide sheath via the cavity slot; It also includes: an extension tube corresponding to at least one cavity, an insertion connector, a locking connector, and a slide rod; The extension tube connects to the proximal end of the cavity, which is the end of the cavity near the handle connector; The insertion connector corresponds one-to-one with the extension tube; the insertion connector is connected to the proximal end of the extension tube, which is the end of the extension tube furthest from the cavity. The locking connector is configured to lock into the insertion connector; The slide rod is fixed to the locking connector. The guide sheath has a preset bending angle at a preset position starting from the proximal end. The slide rod is located between the preset position and the proximal end of the guide sheath. Before the instrument is inserted into the cavity, the locking connector is fixed to the handle connector. After the instrument is inserted into the cavity, the locking connector separates from the handle connector. The slide rod fixed to the locking connector slides downward relative to the guide sheath at a preset bending angle, thereby driving the instrument to slide in the direction of the cavity groove.

2. The multi-lumen introducer sheath of claim 1, wherein, Also includes: An inner tube, which passes through the first cavity; When at least a portion of the cavity wall at the distal end of the first cavity is shared with the guide sheath wall of the guide sheath, the distal end of the at least a portion of the cavity wall has a first cavity conical structure. The distal end of the inner tube has an inner tube tapered structure; The distal end of the first cavity is located at the distal end of the guiding sheath; When the distal end of the inner tube is located at the distal end of the guiding sheath, the edge of the tapered structure of the inner tube is aligned with the edge of the tapered structure of the first cavity.

3. The multi-lumen introducer sheath of claim 1, wherein, The inner diameter of the proximal end of the handle connector is larger than the outer diameter of the distal end of the handle connector.

4. The multi-lumen introducer sheath of claim 1, wherein, The proximal edge of the handle connector is set as an outwardly sloping rounded edge.

5. The multi-cavity guiding sheath according to claim 1, characterized in that, The outer wall of the guide sheath is provided with graduations.

6. A multi-cavity guiding sheath, characterized in that, include: Guiding sheath and handle connector; The guiding sheath has at least two cavities: a first cavity and a second cavity; The handle connector is connected to the proximal end of the guide sheath. At least one of the cavities is provided with a cavity slot along the extension direction of the cavity, the cavity slot penetrating both ends of the cavity; the guide sheath is provided with a guide sheath slot in the same direction as the slot, the guide sheath slot penetrating both ends of the guide sheath, so that the component inserted into the cavity is sequentially detached from the guide sheath through the cavity slot and the guide sheath slot; It also includes: an extension tube corresponding to at least one cavity, an insertion connector, a locking connector, and a slide rod; The extension tube connects to the proximal end of the cavity, which is the end of the cavity near the handle connector; The insertion connector corresponds one-to-one with the extension tube; the insertion connector is connected to the proximal end of the extension tube, which is the end of the extension tube furthest from the cavity. The locking connector is configured to lock into the insertion connector; The slide rod is fixed to the locking joint. The guide sheath has a preset bending angle at a preset position starting from the proximal end. The slide rod is located between the preset position and the proximal end of the guide sheath. Before the instrument is inserted into the cavity, the locking joint is fixed to the handle joint. After the instrument is inserted into the cavity, the locking joint separates from the handle joint. The slide rod fixed to the locking joint slides downward relative to the guide sheath at a preset bending angle, thereby driving the instrument to slide in the direction of the cavity groove and the sheath groove.

7. The multi-lumen introducer sheath of claim 6, wherein, The guide sheath slot corresponds one-to-one with the cavity slot, and the guide sheath slot is in the radial extension direction of the corresponding cavity slot.

8. The multi-lumen introducer sheath of claim 6 or 7, wherein, Also includes: An inner tube, which passes through the first cavity; When at least a portion of the cavity wall at the distal end of the first cavity is shared with the guide sheath wall of the guide sheath, the distal end of the at least a portion of the cavity wall has a first cavity conical structure. The distal end of the inner tube has an inner tube tapered structure; The distal end of the first cavity is located at the distal end of the guiding sheath; When the distal end of the inner tube is located at the distal end of the guiding sheath, the edge of the tapered structure of the inner tube is aligned with the edge of the tapered structure of the first cavity.

9. The multi-lumen introducer sheath of claim 6 or 7, wherein, The inner diameter of the proximal end of the handle connector is larger than the outer diameter of the distal end of the handle connector.

10. The multi-lumen introducer sheath of claim 6 or 7, wherein, The proximal edge of the handle connector is set as an outwardly sloping rounded edge.

11. The multi-lumen introducer sheath of claim 6 or 7, wherein, The outer wall of the guide sheath is provided with graduations.

Images