Intraoperative diaphragm saddle supporting device

Abstract

The invention provides an intraoperative diaphragm saddle supporting device. The intraoperative diaphragm saddle supporting device comprises a supporting structure and a pushing structure. The pushing structure comprises an inner rod and an outer pipe; the inner rod is movably arranged in the outer pipe in a penetrating manner; the far end of the inner rod is connected with the near end of the supporting structure; the supporting structure has a contraction state and an opening state; the support structure is in a contracted state when delivered in the outer tube; the supporting structure is in an open state when extending out of the far end of the outer tube and being unfolded; the supporting structure in the open state can be used for supporting the saddle diaphragm and is provided with a gap. By means of the configuration, the saddle diaphragm can be well supported through the supporting structure, collapse of the saddle diaphragm can be effectively prevented, pituitary tumors cannot be shielded, the supporting structure can be withdrawn through the pushing structure, and the risk of staying in an operation area is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to an intraoperative sella diaphragm support device. Background Art

[0002] Pituitary adenoma is one of the relatively common benign neuroendocrine tumors in clinical practice, and its incidence accounts for about 10% - 15% of intracranial tumors. Except for prolactin adenoma, about 96% of pituitary adenoma patients can have the tumor resected by the transsphenoidal approach. Transsphenoidal resection of pituitary adenoma assisted by neuroendoscopy is one of the commonly used surgical methods for treating pituitary adenoma currently.

[0003] If the following variations occur in the anatomical structures adjacent to the pituitary gland, it will cause difficulties in transsphenoidal surgery: (1) The anterior intercavernous sinus grows towards the front of the pituitary gland, the anterior edge of the sella diaphragm, and even covers the entire anterior wall of the sella turcica. When the dura mater of the sella floor is incised during surgery, it is easy to cause massive bleeding; (2) The sella diaphragm is too thin and the sella diaphragm foramen is too large, which is likely to cause cerebrospinal fluid rhinorrhea; (3) The internal carotid artery is free and exposed in the sphenoid sinus or in the anterolateral part of the sphenoid sinus, and it is easy to be damaged during surgery; (4) The optic nerve canal has a bone defect at the anterolateral wall of the sphenoid sinus, and the optic nerve is directly exposed in the sphenoid sinus, and it is easy to be damaged during surgery; (5) For those with poor pneumatization of the sphenoid sinus, a deviated sphenoid septum to the left, and an anterior sella type sphenoid sinus, it is difficult to locate the sella floor and enter the sella turcica during surgery; (6) For the mixed type of sphenoid sinus with one side being the whole sella type and the other side being the undeveloped type, it is easy to deviate from the midline position during surgery and enter the cavernous sinus or accidentally injure the internal carotid artery. In addition, during the pituitary tumor resection surgery, the sella diaphragm is prone to collapse, which poses a huge obstacle to the operation of the doctor during the surgery. Currently, most doctors choose to use cotton packing to prevent the collapse of the sella diaphragm to make the surgery proceed smoothly. However, the support of cotton is not strong enough to completely prevent the collapse of the sella diaphragm; cotton will also block the pituitary tumor, preventing the doctor from identifying and removing the pituitary tumor; and, there is a risk that the cotton remains in the surgical area.

[0004] Therefore, for those skilled in the art, how to design a device that can play a temporary supporting role for the sella diaphragm is a technical problem that needs to be solved urgently.

[0005] It should be noted that the information disclosed in the background art part of the present application is only intended to deepen the understanding of the general background art of the present application, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an intraoperative sella diaphragm support device to solve one or more problems existing in the current use of cotton packing to prevent the collapse of the sella diaphragm.

[0007] To achieve the above object, the present invention provides an intraoperative sellar diaphragm support device, comprising a support structure and a pushing structure; the pushing structure includes an inner rod and an outer tube; the inner rod is movably disposed within the outer tube; the distal end of the inner rod is connected to the proximal end of the support structure; the support structure has a contracted state and an open state; the support structure is in the contracted state when being delivered within the outer tube; the support structure is in the open state when extending beyond the distal end of the outer tube; the support structure in the open state can be used to support the sellar diaphragm and has a void.

[0008] Optionally, the intraoperative sellar diaphragm support device further includes a locking structure, which is disposed at the proximal end of the pushing structure and is used to lock the inner rod and the outer tube so that the support structure remains in the open state.

[0009] Optionally, the support structure includes a plurality of support portions arranged circumferentially along itself, and adjacent support portions are connected or not connected; each support portion is a closed hollow structure; the distal ends of all the support portions are connected to the distal end of the inner rod.

[0010] Optionally, the support structure is made of a flexible metal material and is integrally cut and formed.

[0011] Optionally, the number of the support portions is not less than 3, and adjacent support portions are not connected and can be independently opened and contracted; the plurality of support portions enclose to form the support structure in a petal shape.

[0012] Optionally, the number of the support portions is 4 to 8.

[0013] Optionally, the head end of the support portion is an arc structure.

[0014] Optionally, the support portion is configured such that the width decreases from the middle to both ends along its own length direction.

[0015] Optionally, the middle of the support portion adopts a first waveband, and both ends of the support portion adopt a second waveband; the maximum width of the first waveband is greater than the maximum width of the second waveband; the ratio of the length of the first waveband to the length of the second waveband is 9:4 to 7:6.

[0016] Optionally, the middle of the support portion adopts a first waveband, and both ends of the support portion adopt a second waveband; the maximum width of the first waveband is greater than the maximum width of the second waveband; the ratio of the maximum width of the first waveband to the maximum width of the second waveband is 3:1 to 2:1.5.

[0017] Optionally, the maximum diameter of the support structure in the open state is not greater than the diameter of the inscribed circle corresponding to the surgical operation area.

[0018] Optionally, the maximum diameter of the support structure in the open state is 20 mm to 30 mm.

[0019] Optionally, the support structure further has a natural state, and the support surface of the support structure in the natural state forms an angle of 30° to 60° with respect to its own radial direction.

[0020] As described above, in the intraoperative sellar diaphragm support device provided by the present invention, it includes: a support structure and a pushing structure; the pushing structure includes an inner rod and an outer tube; the inner rod is movably disposed in the outer tube; the distal end of the inner rod is connected to the proximal end of the support structure; the support structure has a contracted state and an open state; the support structure is in the contracted state when being delivered in the outer tube; the support structure is in the open state when extending beyond the distal end of the outer tube and unfolding; the support structure in the open state can be used to support the sellar diaphragm and has a gap. With such a configuration, a strong supporting force can be provided to the sellar diaphragm through the support structure, basically completely preventing the collapse of the sellar diaphragm. At the same time, there is a gap after the support structure is opened, and the gap provides a passage for external devices to enter and leave the surgical operation area, so that the support structure neither blocks the external devices nor obscures the pituitary tumor, facilitating the surgeon (i.e., medical staff) to identify and excise the pituitary tumor. After the operation, the support structure can be retracted into the outer tube again through the pushing structure and withdrawn from the body together with the pushing structure, avoiding the risk of remaining in the surgical area. Description of the Drawings

[0021] Those of ordinary skill in the art will understand that the provided drawings are used to better understand the present invention and do not constitute any limitation to the scope of the present invention. Among them:

[0022] Figure 1 is a front view of the intraoperative sellar diaphragm support device provided by the present invention according to an embodiment;

[0023] Figure 2 is a schematic structural diagram of the pushing structure provided by the present invention according to an embodiment;

[0024] Figure 3 is a schematic structural diagram of the support structure provided by the present invention according to an embodiment;

[0025] Figure 4 is Figure 3 a partial enlarged view of the support structure in

[0026] Figure 5 is a schematic diagram of the dimensions of the support structure provided by the present invention according to an embodiment;

[0027] Figure 6 is a distal cross-sectional view of the intraoperative sellar diaphragm support device provided by the present invention according to an embodiment;

[0028] Figure 7 This is the structural schematic diagram of the intraoperative diaphragm support device provided by the present invention for supporting the diaphragm.

[0029] [Explanation of reference numerals is as follows]:

[0030] 1 - Support structure; 11 - Support part; 111 - Head end; 110 - First wave band; 130 - Second wave band; 2 - Pushing structure; 21 - Inner rod; 22 - Outer tube. Detailed implementation manners

[0031] To make the objectives, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in very simplified forms and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present invention. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different focuses, and sometimes different scales are used.

[0032] As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is usually used in the sense of including "and / or", the term "several" is usually used in the sense of including "at least one", the term "at least two" is usually used in the sense of including "two or more", in addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. The term "proximal end" is usually the end close to the operator, the term "distal end" is usually the end close to the patient. "One end" and "the other end" as well as "proximal end" and "distal end" usually refer to corresponding two parts, which not only include the endpoints. The terms "mount", "connect", "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. In addition, as used in the present invention, when an element is disposed on another element, it usually only means that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements can be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, an element can be inside, outside, above, below or on one side of another element, etc. in any orientation, unless otherwise clearly specified in the content. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] As used in this application document, "axial direction" refers to the axis direction of the intraoperative sellar diaphragm support device, that is, the advancing or retracting direction of the pushing structure. "Radial direction" refers to the direction perpendicular to the axial direction, and "circumferential direction" refers to the direction around the axial direction.

[0034] The present invention provides an intraoperative sellar diaphragm support device to solve the problems existing in the current use of cotton packing to prevent sellar diaphragm collapse, such as weak support, easy occlusion of pituitary tumors, and possible retention in the body.

[0035] The following description is made with reference to the accompanying drawings.

[0036] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides an intraoperative sellar diaphragm support device for temporarily supporting the sellar diaphragm during surgery. It includes: a support structure 1 that can play a role in supporting the sellar diaphragm; and a pushing structure 2. The pushing structure 2 includes an inner rod 21 and an outer tube 22. The inner rod 21 is movably inserted into the outer tube 22, and the distal end of the inner rod 21 is connected to the proximal end of the support structure 1.

[0037] The support structure 1 has a contracted state and an opened state; the support structure 1 is in a contracted state when being delivered in the outer tube 22. Here, the delivery includes the transportation to the surgical operation area and the retraction after the operation is completed. The support structure 1 is in an opened state when it extends beyond the distal end of the outer tube 22 and unfolds. The support structure 1 in the opened state can be used to support the sellar diaphragm and has a void. The void allows external devices to pass through the support structure 1, thereby facilitating the entry and exit of external devices into and from the surgical operation area during surgery. The external devices described in this specification are, for example, surgical instruments such as scalpels, forceps, and suture needles that are required to be used in pituitary tumor resection surgery to achieve various functions such as hemostasis, suturing, and clamping. It should be further noted that the void described in the present invention should be distinguished from the small and dense mesh holes of the intratumoral occlusion device that prevent blood flow, but the size of the void is designed to enable the relevant surgical instruments in pituitary tumor resection surgery to freely pass through, and at the same time, it will not occlude the pituitary tumor. The size of the void can be determined by the size of the external device allowed to pass through.

[0038] The outer tube 22 can play a role in protecting and contracting the support structure 1, and the inner rod 21 can push or pull the support structure 11 to complete release or recovery. Specifically, before the operation, the support structure 1 is contracted in the outer tube 22 and smoothly reaches the sellar diaphragm through the access for the release of the support structure 1; during the release, the support structure 1 can be pushed out of the distal end of the outer tube 22 through the force conduction of the inner rod 21; after the operation, the inner rod 21 can be pulled back to make the support structure 1 contract back into the outer tube 22 again, and finally, the pushing structure 2 and the support structure 1 are withdrawn from the body together.

[0039] The support structure 1 itself has good ductility and can shrink and open. This structural design of the support structure 1 ensures that it can be delivered in the push structure 2 with a smaller diameter and reach the working area, and can be smoothly unfolded, providing a strong support force for the sella diaphragm, which can basically completely prevent the collapse of the sella diaphragm. At the same time, after the support structure 1 is opened, it can also provide a gap for external equipment to pass through, and will not block the pituitary tumor, which is convenient for the surgeon to identify and remove the pituitary tumor; after the operation, the support structure 1 can be pulled back into the outer tube 22 through the inner rod 21, and then withdrawn to the outside of the body together with the push structure 2, avoiding the risk of being trapped in the surgical area.

[0040] It should be understood that the support structure 1 can fit with the surface of the saddle diaphragm in the open state, and is suitable for propping up the saddle diaphragm in the axial direction of the support device to prevent the saddle diaphragm from collapsing. The support structure 1 can be retracted to a minimum diameter in the contracted state to facilitate delivery and withdrawal. In the process of the support structure 1 changing from the contracted state to the open state, the diameter of the support structure 1 increases until the support structure 1 can fit stably and effectively with the surface of the saddle diaphragm. When it is necessary to contract, the support structure 1 is pulled back by means of the inner rod 21, and the support structure 1 is pulled into the outer tube 22 through the distal end of the outer tube 22 to reduce the diameter and contract.

[0041] The intraoperative saddle diaphragm support device of the embodiment of the present invention preferably also includes a locking structure (not shown), which is arranged at the proximal end of the pushing structure 2 and is used to lock the inner rod 21 and the outer tube 22 when necessary, so that the inner rod 21 and the outer tube 22 do not move relative to each other. This structural design can lock the inner rod 21 and the outer tube 22 without manual operation. It is particularly considered that after locking, the support structure 1 is kept in an open state to ensure the accuracy and safety of the operation, and also make the operator more relaxed and comfortable when performing the operation. Of course, the fixing structure can also release the lock on the inner rod 21 and the outer tube 22.

[0042] It should be noted that there are multiple structures for the locking structure to achieve locking, and at least one of them can be selected to perform. The locking structure can be implemented by technologies well known in the art, such as a lock button, a sliding lock, etc., and the present invention is not limited to this. As an example, the locking structure uses a Y-shaped valve, which is used not only to lock the inner rod 21 and the outer tube 22, but also to act as a joint, which can be connected to an external device, thereby playing the role of water injection, air intake, etc. The locking structure is set at the most proximal end of the saddle diaphragm support device during surgery, so that the operator can operate the locking structure outside the body.

[0043] The support structure 1 may also include various openable and closable structural designs, including annular frames, metal meshes and other structures that can be expanded and contracted. Such structures are also easier to process in one piece, which helps to reduce costs.

[0044] Preferably, the support structure 1 is made of a flexible metal material, so that the support structure 1 can bend and deform freely under the action of an external force, but will not break or deform excessively. Based on this, the support structure 1 can be compressed in the outer tube 22 and can be released and deployed after reaching the affected area. Materials suitable for flexible metals include, but are not limited to, nickel-titanium alloys, and can also be other shape memory alloys and superelastic metals, such as stainless steel, cobalt-chromium alloys, etc. The use of flexible metal materials can well solve the problem that the support structure 1 is prone to deformation during the compression process, can also reduce the risk of damage to the tissues at the affected area by the support structure 1, and can also better achieve the deployment effect and is not easy to scratch blood vessels.

[0045] Preferably, the support structure 1 is integrally cut and then shaped, with a simple process and convenient processing and production.

[0046] See Figures 2 to 6 , in this embodiment, the support structure 1 adopts an annular frame, which includes a plurality of support portions 11 arranged along its circumferential direction, and adjacent support portions 11 may or may not be connected. The plurality referred to in this specification means at least two, preferably more than two. Each support portion 11 is a closed and hollow structure (equivalent to a grid), and the ends of all support portions 11 are connected to the distal end of the inner rod 21. The voids provided by the support portions 11 and the gaps between the support portions 11 in this structure can form the voids for external devices to pass through. Preferably, each support portion 11 is made of a flexible metal wire.

[0047] In one embodiment, adjacent support portions 11 are not connected and can be independently opened and contracted, which can make the diameter of the support structure 1 smaller in the contracted state. At the same time, this structure preferably has the number of support portions 11 not less than 3, which can provide sufficient strong support force and enclose to form a petal-shaped support structure 1.

[0048] In other embodiments, the annular frame is an annular wave ring, which is a closed ring, and adjacent support portions 11 are connected, such as flexibly connected or rigidly connected. It can be understood that if adjacent support portions 11 are not connected, it is equivalent to forming independently openable and closable support portions 11. The annular wave ring is also easy to compress and expand, so that the whole support structure 1 has good ductility and supportability.

[0049] The shape of the support portion 11 is diverse and is not limited to the shape structure disclosed in the embodiments of the present invention. The number of support portions 11 is 2, 3 or more, preferably, the number of support portions 11 is 4 to 8. If the number of support portions 11 is too large, the size of the gaps and voids formed in the circumferential direction will decrease, which is not conducive to increasing the surgical operation space. Therefore, it is better that the number of support portions 11 does not exceed 8. Although in this embodiment, the number of support portions 11 is 6, it is not limited to this in practice.

[0050] The ends of all the supporting parts 11 can be bound together and then connected to the distal end of the inner rod 21, or alternatively, the ends of each supporting part 11 can be individually connected to the distal end of the inner rod 21. There is no particularity in the connection method between the end of the support structure 1 and the distal end of the inner rod 21, as long as the two can be fixed and will not easily become loose. As an example, the end of the support part 11 is connected to the distal end of the inner rod 21 by means of adhesion with UV curable glue or soldering.

[0051] See Figure 4 , the head end 111 (i.e., the free end) of the support part 11 is preferably an arc structure, making the structure of the support part 11 smoother, not easily scratching the tissue on the surface of the sellar diaphragm, and not easily getting stuck in the tissue on the surface of the sellar diaphragm, so that it can be smoothly opened and contracted.

[0052] In order to further increase the surgical operation space and surgical field of view, the support part 11 is preferably designed with a combination of large waves and small waves, so that the force on the contact surface with the sellar diaphragm is more uniform, not only providing stronger support force, better smoothness, but also better providing an unobstructed view and surgical space.

[0053] More specifically, see Figure 4 and Figure 5 , the support part 11 is configured such that the width decreases from the middle to both ends along its own length direction. At the same time, this structure can improve the support force through the large wave in the middle, making the support structure 1 not easily collapse and move, and can also provide a larger gap through the large wave in the middle, facilitating the surgeon to observe and perform resection operations through the large wave, and relevant surgical instruments can pass through the large wave to cut and remove the pituitary tumor, with a larger surgical operation space. In addition, the small wave at the head end 111 of the support part 11 can play a smoothing role, achieving the effect of not damaging and not getting stuck in the tissue on the surface of the sellar diaphragm in the surgical operation area.

[0054] For the convenience of description, the large wave in the middle of the support part 11 is defined as the first wave band 110, and the small waves at both ends of the support part 11 are defined as the second wave band 130.

[0055] Preferably, the length ratio of the first wave band 110 to the second wave band 130 is 9:4 to 7:6, and a more appropriate ratio is 8:5; when designing the large wave band and the small wave band according to this length ratio, the supportability and smoothness of the support part 11 are in an optimal state. It should be noted that the length here refers to the straight line length of the support part 11 in the same plane. For example, the length of the first wave band 110 refers to the distance between the two farthest points in the length direction, and the length of the second wave band 130 refers to the distance between the two farthest points in the length direction.

[0056] Preferably, the ratio of the maximum width of the first waveband 110 to the maximum width of the second waveband 130 is 3:1 to 2:1.5, and a more suitable ratio is 2:1. At the same time, this width design can maximize the large waveband and have a sufficient number of support parts 11 to provide support.

[0057] Continue to refer to Figure 5 , the total length L of the support part 11 is preferably 6 mm to 14 mm, and the maximum width is 1 mm to 2 mm.

[0058] Preferably, the maximum diameter of the support structure 1 after being opened is not greater than the diameter of the inscribed circle corresponding to the operation area of the pituitary tumor resection surgery, ensuring that the support structure 1 will not touch the surrounding sensitive brain tissue after being opened, thereby increasing safety. The diameter of the inscribed circle corresponding to the operation area of the pituitary tumor resection surgery is generally 30 mm to 40 mm. Accordingly, the maximum diameter of the support structure 1 after being opened can be 20 mm to 30 mm.

[0059] Refer to Figure 1 , the support structure 1 also has a natural state. In the natural state, the support structure 1 is arranged outside the distal end of the outer tube 22 and is in an open state. In the natural state, each support part 11 can be arc-shaped in its own length direction. Further, in the natural state, the support surface of the support structure 1 forms an angle α of 30° to 60° with respect to its own radial direction, that is, when heat-treating plasticity, each support part 11 is shaped into this angle α.

[0060] Refer to Figure 7 , the above angle α enables the support structure 1 to approach parallel to the radial direction (equivalent to a plane) under the action of pressure when supporting the diaphragm sellae, increasing the contact area and making the force more uniform, achieving a better support effect and not damaging the tissue on the surface of the diaphragm sellae. More preferably, the support surface of the support structure 1 in the natural state forms an angle α of 40° to 55° with respect to its own radial direction, and the effect is better. The support surface described in this specification refers to the side of the support part 11 that fits the surface of the diaphragm sellae. The natural state refers to the size and shape of the support structure 1 without external force constraint.

[0061] Furthermore, for the pushing structure 2, the present invention does not particularly limit the materials, shapes, and sizes of the inner rod 21 and the outer tube 22. Generally, either the inner rod 21 or the outer tube 22 can be made of a polymer material, but the case of using a metal material is not excluded. The inner rod 21 and the outer tube 22 mostly have a circular cross-section. The friction between the inner rod 21 and the outer tube 22 should be minimized.

[0062] In summary, in the intraoperative diaphragm sellae support device provided by the present invention, it includes: a support structure 1 and a pushing structure 2; the pushing structure 2 includes an inner rod 21 and an outer tube 22; the inner rod 21 is movably disposed in the outer tube 22; the distal end of the inner rod 21 is connected to the proximal end of the support structure 1; the support structure 1 has a contracted state and an opened state; the support structure 1 is in the contracted state when being delivered in the outer tube 22; the support structure 1 is in the opened state when extending beyond the distal end of the outer tube 22; the support structure 1 in the opened state can be used to support the diaphragm sellae and has a gap. With such a configuration, the present invention can provide a strong supporting force to the diaphragm sellae through the support structure 1, basically completely prevent the collapse of the diaphragm sellae, enable the smooth progress of the operation, and at the same time, after the support structure 1 is opened, it can also provide a gap for external devices to pass through, neither blocking the external devices nor obscuring the pituitary tumor, facilitating the surgeon to identify and resect the pituitary tumor. After the operation, the support structure 1 can be retracted into the outer tube 22 again through the pushing structure 2 and withdrawn from the body together with the pushing structure 2, avoiding the risk of staying in the operation area.

[0063] In the intraoperative diaphragm sellae support device provided by the present invention, a locking structure can be further configured to lock the inner rod 21 and the outer tube 22 when the support structure 1 is opened, ensuring the safety and stability of the opened state of the support structure 1.

[0064] In the intraoperative diaphragm sellae support device provided by the present invention, the support portion 11 is particularly designed as a structure of large wave bands and small wave bands. On the one hand, the supporting force is increased through the large wave bands, and the large wave bands can better expose the affected area (i.e., the pituitary tumor), facilitating the surgeon's observation and operation. On the other hand, the smoothness can be increased through the small wave bands, and thus the effect of not damaging and not jamming tissues in the operation area can be achieved. Therefore, the combined structure design of the large wave bands and the small wave bands improves the supporting force and the smoothness, and at the same time provides the surgeon with an unobstructed vision and operation space.

[0065] In the intraoperative diaphragm sellae support device provided by the present invention, the angle α between the support surface of the support structure 1 in the natural state and the radial direction is designed as a specific angle, so that the support structure 1 can approach the radial direction under the action of a certain supporting force, increasing the contact area and making the force more uniform.

[0066] In this way, the present invention can effectively solve the problem of the collapse of the diaphragm sellae in the resection operation of pituitary tumors, and provides a simple and convenient auxiliary treatment means for this, filling the blank in this field at present. Moreover, the device is easy to operate and release, has good flexibility, can reduce the operation difficulty during the operation and shorten the operation time. At the same time, the clinical application range of the device is wide, and the design of the contracted diameter can achieve one specification corresponding to different operations, being flexible and convenient to use.

[0067] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention based on the above disclosure fall within the scope of protection of the technical solution of the present invention.

Claims

1. An intraoperative diaphragm sella support device, characterized in that, it includes a support structure and a pushing structure; the pushing structure includes an inner rod and an outer tube; the inner rod is movably disposed in the outer tube; the distal end of the inner rod is connected to the proximal end of the support structure; the support structure has a contracted state and an opened state; the support structure is in the contracted state when being delivered in the outer tube; the support structure is in the opened state when extending out beyond the distal end of the outer tube and unfolding; the support structure in the opened state can be used to support the diaphragm sella and has a gap.

2. The intraoperative diaphragm sella support device according to claim 1, characterized in that, it further includes a locking structure, and the locking structure is disposed at the proximal end of the pushing structure and is used for locking the inner rod and the outer tube so that the support structure is maintained in the opened state.

3. The intraoperative diaphragm sella support device according to claim 1 or 2, characterized in that, the support structure includes a plurality of support parts arranged circumferentially along itself, and adjacent support parts are connected or not connected, each support part is a closed hollow structure, and the tail ends of all the support parts are connected to the distal end of the inner rod.

4. The intraoperative diaphragm sella support device according to claim 3, characterized in that, the support structure is made of a flexible metal material and is integrally cut and formed.

5. The intraoperative diaphragm sella support device according to claim 3, characterized in that, the number of the support parts is not less than 3, and adjacent support parts are not connected and can be independently opened and contracted, and the plurality of support parts enclose to form the support structure in a petal shape.

6. The intraoperative diaphragm sella support device according to claim 5, characterized in that, the number of the support parts is 4 to 8.

7. The intraoperative diaphragm sella support device according to claim 3, characterized in that, the head end of the support part is an arc structure.

8. The intraoperative diaphragm sella support device according to claim 3, characterized in that, the support part is configured such that the width decreases from the middle to both ends along its own length direction.

9. The intraoperative diaphragm sella support device according to claim 8, characterized in that, the middle part of the support part adopts a first wave band, the two ends of the support part adopt a second wave band, the maximum width of the first wave band is greater than the maximum width of the second wave band, and the ratio of the length of the first wave band to the length of the second wave band is 9:4 to 7:

6.

10. The intraoperative diaphragm sella support device according to claim 8, characterized in that, the middle part of the support part adopts a first wave band, the two ends of the support part adopt a second wave band, the maximum width of the first wave band is greater than the maximum width of the second wave band, and the ratio of the maximum width of the first wave band to the maximum width of the second wave band is 3:1 to 2:1.

5.

11. The intraoperative diaphragm sella support device according to claim 1 or 2, characterized in that, the maximum diameter of the support structure in the opened state is not greater than the diameter of the inscribed circle corresponding to the surgical operation area.

12. The intraoperative diaphragm sella support device according to claim 11, characterized in that, the maximum diameter of the support structure in the opened state is 20 mm to 30 mm.

13. The intraoperative diaphragm sellae support device according to claim 1 or 2, characterized in that, the support structure further has a natural state, and in the natural state, the support surface of the support structure forms an angle of 30° to 60° with respect to its own radial direction.

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