Retraction device for transnasal craniocerebral operation

Abstract

The invention provides a retractor for a transnasal craniocerebral operation, and belongs to the technical field of medical machinery. Comprising a pair of giraffe pliers, an inner sleeve is installed on the outer wall of the giraffe pliers, and a retracting sleeve is fixedly connected to the outer wall, away from a first annular disc, of a first connecting piece; the auxiliary retraction assembly is used for being matched with the giraffe clamp in the operation process of a patient, and the auxiliary retraction assembly is connected with the retraction sleeve. By arranging the auxiliary retracting assembly, the smoothness of placing the giraffe forceps by medical staff can be improved, it is ensured that the giraffe forceps are accurately conveyed to the designated position in the nasal cavity, so that the operation efficiency is improved, in the giraffe forceps conveying process, the giraffe forceps cannot make contact with the inner wall of the nasal cavity of a patient, and the operation safety is improved. The inner wall mucous membrane of the nasal cavity can be prevented from being torn or scratched by the giraffe forceps, hyperemia and swelling of the mucous membrane are effectively prevented, the difficulty of narrowing of a nasal cavity channel and feeding of instruments such as the giraffe forceps is reduced, and the effectiveness of endoscope observation is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical machinery, and in particular to a retraction device for transnasal cranial surgery. Background Art

[0002] The retraction device used for transnasal cranial surgery is a type of medical device designed specifically for transnasal endoscopic skull base surgery. Its core function is to physically open or maintain the anatomical channels of the nasal cavity, sinuses and skull base surgical area, providing a stable, clear field of view and sufficient operating space for surgical operations, while reducing pressure or damage to surrounding normal tissues (such as nasal mucosa, nasal concha, blood vessels and nerves). Common medical devices include curette suction devices, probes, giraffe forceps, mushroom head forceps, etc.

[0003] Before the medical staff performs the operation, they need to use a retractor instrument (such as a nasal speculum) to stretch the nasal cavity, then insert the endoscope into the nostril to explore the internal structure of the nasal cavity. At the same time, other instruments are used to clean the patient's nasal cavity to ensure that the nasal passage is clean and smooth. Then the medical staff slowly inserts the giraffe forceps into the patient's nasal cavity and uses the endoscope to send it to the designated position for operation. During the process of inserting the giraffe forceps, the size of the nasal speculum will occupy a certain space inside the nasal cavity. Even if the nasal cavity has been stretched, the internal space of the patient's nasal cavity is still limited. In this case, the end of the giraffe forceps will inevitably touch the inside of the patient's nasal cavity during movement. In addition, the inner wall of the nasal cavity itself is relatively fragile. Once it is resisted by the giraffe forceps, it may cause the nasal lining mucosa to tear or abrasion. Repeated touching of the inner wall of the nasal cavity will not only stimulate congestion and swelling of the mucosa, further narrowing the nasal passage, but also make it more difficult to insert instruments such as the giraffe forceps, thereby affecting the endoscopic observation effect. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a retraction device for transnasal cranial surgery. By setting up an auxiliary retraction component, the smoothness of the placement of the giraffe clamp by medical staff can be improved, ensuring that the giraffe clamp is accurately delivered to the designated position in the nasal cavity, and can prevent the giraffe clamp from causing tears or abrasions to the mucosa of the inner wall of the nasal cavity, prevent mucosal congestion and swelling, reduce the narrowing of the nasal passage and the difficulty in inserting instruments such as the giraffe clamp, and ensure the effectiveness of endoscopic observation; the above setting can solve the problem that the end of the existing giraffe clamp touches the inside of the patient's nasal cavity, which may cause tears or abrasions to the mucosa of the inner wall of the nasal cavity. Repeated touching of the inner wall of the nasal cavity will stimulate mucosal congestion and swelling, narrow the nasal passage, and increase the difficulty of inserting instruments such as the giraffe clamp, thereby affecting the endoscopic observation effect.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A retraction device for transnasal cranial surgery includes a giraffe forceps, an inner sleeve is installed on the outer wall of the giraffe forceps, the outer wall of the inner sleeve is fixedly connected to an outer sleeve, a guide groove 2 is opened at the end of the inner sleeve, a guide groove 1 is fixedly connected to the end of the outer sleeve, a circular ring disk 1 is fixedly connected to the outer wall of the circular ring disk 1, a connecting piece 1 is fixedly connected to the retraction sleeve away from the outer wall of the circular ring disk 1, and an auxiliary retraction assembly is connected to the retraction sleeve.

[0007] Optionally, the auxiliary retraction assembly includes a flow hole opened on the outer wall of the retraction sleeve, the end of the retraction sleeve away from the connecting piece 1 is fixedly connected to the connecting piece 2, the end of the retraction sleeve close to the connecting piece 2 is installed with a clamping plate, and the end of the connecting piece 2 away from the retraction sleeve is fixedly connected to the annular disk 2.

[0008] Optionally, an extraction plate is slidably connected to the inner wall of the retraction sleeve, a drainage hole is installed at the end of the retraction sleeve away from the connecting piece 1, and a middle connecting piece is fixedly connected to the middle position of the outer wall of the outer sleeve.

[0009] Optionally, a liquid storage bag is slidably connected to the outer wall of the extraction plate, a plurality of liquid injection ports are opened at the end of the liquid storage bag close to the first connecting piece, and a plurality of liquid outlets are opened on the outer wall of the liquid storage bag.

[0010] Optionally, an arc-shaped plate is installed on the outer wall of the annular disk 1, a placement groove is provided on the outer wall of the annular disk 1, a plurality of clamping blocks are fixed on the inner wall of the placement groove, a clamping groove is provided on the inner wall of the placement groove, and a plurality of adjustment holes are provided on one end of the retraction sleeve close to the connecting plate 1.

[0011] Optionally, the linear array of flow holes is distributed on the outer wall of the retraction sleeve, the circumferential array of connecting plates is distributed on the outer wall of the annular disk 2, a plurality of lightweight holes are opened on the outer wall of the annular disk 2, and a weakening groove is opened in the middle position of the clamping plate.

[0012] Optionally, the extraction plates are symmetrically distributed on both sides of the retraction sleeve, the drainage holes are distributed in a circular array at one end of the retraction sleeve close to the second connecting piece, one end of the middle connecting piece is fixedly connected to the middle position of the outer wall of the outer sleeve, and the other end of the middle connecting piece is fixedly connected to the middle position of the inner wall of the retraction sleeve.

[0013] Optionally, the liquid storage bag is made of rubber, and the pore size distribution of the liquid injection port and the liquid outlet is larger on the outside and smaller on the inside.

[0014] Optionally, the size of the arc plate is smaller than the size of the placement groove, the clamping blocks are fixedly distributed on the inner wall of the placement groove, and the sizes of the clamping groove and the adjustment hole are adapted to the sizes of both ends of the arc plate.

[0015] Optionally, the retraction sleeve has a gradual size as a whole, the connecting pieces are distributed in a circular array on the outer wall of the annular disk, and the size of the outer sleeve is larger than that of the inner sleeve.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, by setting up an auxiliary retraction component, it can not only improve the smoothness of medical staff's placement of the giraffe forceps, ensure that the giraffe forceps is accurately delivered to the designated position in the nasal cavity, thereby improving the efficiency of the operation, but also in the process of inserting the giraffe forceps, it will not contact the inner wall of the patient's nasal cavity, but only contact the inner wall of the auxiliary retraction component, thereby avoiding the giraffe forceps from causing tears or abrasions to the mucosa of the inner wall of the nasal cavity. In addition, even if the giraffe forceps contacts the auxiliary retraction component multiple times, it will not cause the auxiliary retraction component to affect the mucosa in the nasal cavity, which can effectively prevent mucosal congestion and swelling, reduce the narrowing of the nasal passage and the difficulty in inserting instruments such as giraffe forceps, and ensure the effectiveness of endoscopic observation.

[0018] By arranging an extraction plate, a liquid storage bag, a liquid injection port and a liquid outlet in the auxiliary retraction component, lubricating liquid flows out during the process of the retraction sleeve being sent into the patient's nasal cavity. This not only reduces the friction between the retraction sleeve and the inner wall of the patient's nasal cavity, facilitating the smooth delivery of the retraction sleeve, but also is simple to operate. Only the extraction plate needs to be pulled outward. At the same time, the lubricating liquid flows out in a small volume state, which can reduce the discomfort caused by the lubricating liquid to the inside of the patient's nasal cavity and improve the practicality and operability of the device.

[0019] By arranging an outer sleeve, guide groove 1, guide groove 2 and inner sleeve in the auxiliary retraction assembly, when the giraffe forceps slides along the inner wall of the inner sleeve, not only can the hollow structure between the connecting piece 1 and the inner sleeve buffer the resistance force between the giraffe forceps and the inner wall of the inner sleeve, reducing the resistance pressure acting on the inner sleeve, thereby reducing the resistance pressure between the inner sleeve and the retraction sleeve, and further reducing the influence of the retraction sleeve on the inner wall of the nasal cavity, but also in the process of operating the giraffe forceps, even if there is a lack of support when holding the giraffe forceps, with the help of the limiting effect of the inner sleeve, when the giraffe forceps are offset or deflected at an angle, the excessive angle deflection of the giraffe forceps can be greatly reduced, thereby avoiding adverse effects on patients due to improper operation of the instrument during surgery.

[0020] By providing an arc plate, placement slots, snap-on slots and adjustment holes, when the size of the retraction sleeve does not match the size of the patient's nasal cavity, not only can the ring disk 1 be rotated clockwise to change the distance between the connecting plate 1 and the retraction sleeve, thereby reducing the overall size of the retraction sleeve and improving the size adaptability to the patient's nasal cavity, but the two ends of the retraction sleeve can also be adjusted separately according to the actual conditions of the nasal cavity of different patients, fully demonstrating the flexibility and adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of a retractor device used in transnasal cranial surgery;

[0023] Figure 2 This is a schematic diagram of the cross-sectional three-dimensional structure of a retractor device for transnasal cranial surgery;

[0024] Figure 3 This is a first-person perspective, magnified structural diagram of the auxiliary retraction component;

[0025] Figure 4 This is a schematic diagram of the second-angle magnified structure of the auxiliary retraction component;

[0026] Figure 5 This is a schematic diagram of the first-person perspective magnified cross-section of the auxiliary retraction component;

[0027] Figure 6 A schematic diagram of the second perspective magnified structure of the cross-section of the auxiliary retraction component;

[0028] Figure 7 This is a schematic diagram of the exploded and enlarged structure of the auxiliary retraction component;

[0029] Figure 8 It is a schematic diagram of the three-dimensional enlarged structure of the liquid storage capsule, the liquid injection port and the liquid outlet;

[0030] Figure 9 It is a schematic diagram of the three-dimensional enlarged structure of the extraction plate, liquid storage capsule and liquid outlet;

[0031] Figure 10 This is a schematic diagram of the three-dimensional enlarged structure of the annular disk 2, the outer sleeve and the middle connecting piece;

[0032] Figure 11 It is a schematic diagram of the three-dimensional enlarged structure of the outer sleeve, the guide groove 1 and the guide groove 2;

[0033] Figure 12 It is a three-dimensional enlarged structural diagram of the retraction sleeve and the clamping plate;

[0034] Figure 13 for Figure 12 Schematic diagram of the three-dimensional enlarged structure at point A in the middle.

[0035] Reference numerals:

[0036] 1. Giraffe forceps; 2. Retractor sleeve; 3. Connecting piece 1; 4. Ring disk 1; 5. Flow hole; 6. Connecting piece 2; 7. Snap-on plate; 8. Ring disk 2; 9. Outer sleeve; 10. Guide groove 1; 11. Guide groove 2; 12. Inner sleeve; 13. Extraction plate; 14. Drainage hole; 15. Middle connecting piece; 16. Liquid reservoir; 17. Liquid injection port; 18. Liquid outlet; 19. Arc plate; 20. Placement slot; 21. Snap-on block; 22. Snap-on slot; 23. Adjustment hole.

[0037] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0038] The following describes in detail a retractor device for transnasal cranial surgery provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative methods for implementing known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0039] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0040] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0041] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0042] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0043] like Figures 1 to 13 As shown, the embodiment of the present invention provides a retraction device for transnasal cranial surgery, including a giraffe clamp 1, as shown in FIG. Figure 5 As shown, the outer wall of the giraffe pliers 1 is installed with an inner sleeve 12, the outer wall of the inner sleeve 12 is fixedly connected to the outer sleeve 9, the end of the inner sleeve 12 is provided with a guide groove 2 11, the end of the outer sleeve 9 is fixedly connected to a guide groove 10, the end of the outer sleeve 9 is fixedly connected to a ring disk 4, the outer wall of the ring disk 4 is fixedly connected to a connecting piece 3, the connecting pieces 3 are distributed in a circular array on the outer wall of the ring disk 4, and the connecting piece 3 is fixedly connected to the outer wall of the ring disk 4 away from the outer wall of the ring disk 4 with a retraction sleeve 2. The auxiliary retraction component is used in conjunction with the giraffe forceps 1 during patient surgery. The auxiliary retraction component is connected to the retraction sleeve 2. The retraction sleeve 2 has a gradient size as a whole. The size of the outer sleeve 9 is larger than the size of the inner sleeve 12. The retraction sleeve 2 is made of medical silicone as a whole and fits the human body. The size of the retraction sleeve 2 is a large diameter at one end and a small diameter at the other end. Three adjustment grooves are provided on the inner wall of the small diameter end of the retraction sleeve 2, and a sliding groove is provided in the inner cavity at the top of the retraction sleeve 2.

[0044] The surgical process of transnasal cranial surgery: Before the operation, the patient undergoes an imaging examination, including cranial CT and MRI to determine the location and size of the lesion, and its relationship with surrounding blood vessels, nerves and brain tissue. The nasal passage is evaluated to see if it is suitable for surgery. The nasal hair is removed and the nasal passage is rinsed with saline or antibiotics. Then, medical instruments are prepared, including an endoscopic system and existing retractors, bone rongeurs, curettes, etc. Finally, after the patient is anesthetized, medical instruments are used to resect the lesion and perform skull base reconstruction and nasal packing.

[0045] By setting up an auxiliary retraction component, not only can the medical staff improve the smoothness of placing the giraffe forceps 1, ensuring that the giraffe forceps 1 is accurately delivered to the designated position in the nasal cavity, thereby improving the efficiency of the operation, but also in the process of delivering the giraffe forceps 1, it will not contact the inner wall of the patient's nasal cavity, but only contact the inner wall of the auxiliary retraction component, thereby avoiding the giraffe forceps 1 from causing tears or abrasions to the mucosa of the inner wall of the nasal cavity. In addition, even if the giraffe forceps 1 contacts the auxiliary retraction component multiple times, it will not cause the auxiliary retraction component to affect the mucosa in the nasal cavity, which can effectively prevent mucosal congestion and swelling, reduce the narrowing of the nasal passage and the difficulty in delivering instruments such as the giraffe forceps 1, and ensure the effectiveness of endoscopic observation.

[0046] like Figure 4 As shown, the auxiliary retraction assembly includes a flow hole 5 opened on the outer wall of the retraction sleeve 2, the end of the retraction sleeve 2 away from the connecting piece 1 3 is fixedly connected to the connecting piece 2 6, the end of the retraction sleeve 2 close to the connecting piece 2 6 is installed with a clamping plate 7, and the end of the connecting piece 2 6 away from the retraction sleeve 2 is fixedly connected to the annular disk 2 8. Figures 5 to 7 As shown, an extraction plate 13 is slidably connected to the inner wall of the retracting sleeve 2, a drainage hole 14 is installed at the end of the retracting sleeve 2 away from the connecting piece 3, and a middle connecting piece 15 is fixedly connected to the middle position of the outer wall of the outer sleeve 9. Figure 8 and Figure 9As shown, the liquid reservoir 16 is mounted between the extraction plate 13 and the retraction sleeve 2. When the extraction plate 13 is pulled, the top of the extraction plate 13 presses against the bottom of the liquid reservoir 16. Specifically, the liquid reservoir 16 is fixed within a sliding groove in the inner cavity at the top of the retraction sleeve 2. The extraction plate 13 slides within the inner cavity at the top of the retraction sleeve 2. The extraction plate 13 is designed with a raised portion at the small-diameter end of the retraction sleeve 2. The end of the liquid reservoir 16 near the connecting piece 3 is provided with several liquid injection ports 17, and the outer wall of the liquid reservoir 16 is provided with several liquid outlet ports 18. The flow holes 5 are linearly arrayed on the outer wall of the retraction sleeve 2, the connecting pieces 2 6 are circumferentially arrayed on the outer wall of the annular disk 2 8, a number of lightweight holes are provided on the outer wall of the annular disk 2 8, a weakening groove is provided in the middle position of the clamping plate 7, the extraction plates 13 are symmetrically distributed on both sides of the retraction sleeve 2, the drainage holes 14 are circumferentially arrayed on one end of the retraction sleeve 2 close to the connecting piece 2 6, one end of the middle connecting piece 15 is fixedly connected to the middle position of the outer wall of the outer sleeve 9, and the other end of the middle connecting piece 15 is fixedly connected to the middle position of the inner wall of the retraction sleeve 2, the liquid storage bag 16 is made of rubber, and the aperture distribution of the liquid injection port 17 and the liquid outlet 18 are both large on the outside and small on the inside, and the size of the flow hole 5 is consistent with that of the liquid outlet 18. The sizes are consistent and the positions are also the same. The size of connecting piece 13 is larger than the size of middle connecting piece 15, which is larger than the size of connecting piece 2 6. The top of the clamping plate 7 contacts the inner wall of the retraction sleeve 2. Three adjustment grooves are provided in the inner circumferential array of the retraction sleeve 2. Their sizes are consistent with the size of the top of the clamping plate 7. Six drainage grooves are provided in the circumferential array on the outer wall of the circular ring disk 2 8. The inner sleeve 12 is fixedly sleeved on the inner wall of the outer sleeve 9. The guide groove 10 and the guide groove 2 11 are both provided on the same side of the outer sleeve 9 and the inner sleeve 12, and are also located at the large diameter end of the retraction sleeve 2. The outer sleeve 9 and the inner sleeve 12 are both made of medical silicone. The outer sleeve 9 and the inner sleeve 12 are fixed at both ends, and the middle position is hollow.

[0047] Through the above structure, the medical staff needs to stretch the patient's nasal cavity before the operation, and then place the retraction sleeve 2 horizontally (the axis of the retraction sleeve 2 is horizontal), and the liquid reservoir 16 is facing upward. Then, use a syringe to inject the liquid containing lubricant into the liquid reservoir 16 from the liquid injection port 17, and keep it vertical and still, so that the lubricating liquid fully fills the inner cavity of the liquid reservoir 16. At this time, it is possible to observe whether there is liquid overflowing from the liquid outlet 18 through the circulation hole 5 to determine whether the lubricating liquid is in a saturated state. Then the medical staff holds the outer wall of the retraction sleeve 2 horizontally and sends the small diameter end of the retraction sleeve 2 into the patient's nasal cavity. When the retraction sleeve 2 enters about one-third of the nasal cavity, start to pull the extraction plate 13, and squeeze the bottom of the liquid reservoir 16 through the raised part at the end of the extraction plate 13, so that the lubricating liquid in the liquid reservoir 16 flows out through the liquid outlet 18 and the circulation hole 5. 18 adopts a structure that is large on the outside and small on the inside, that is, the diameter of the circular hole on the outer wall is large, and the diameter of the circular hole on the inner wall is small. When the lubricating liquid has viscosity, the lubricating liquid is not easy to flow out from the liquid storage bag 16 under the action of natural gravity. The lubricating liquid can only flow out along the liquid outlet 18 and the flow hole 5 by squeezing the raised part at the end of the extraction plate 13, and finally the lubricating liquid sticks to the surface of the retraction sleeve 2 and the inner wall of the nasal cavity, and then is slowly sent into the retraction sleeve 2 in this way. Since the retraction sleeve 2 is made of medical silicone material that fits the human body and is used with lubricating liquid, the damage of the outer wall of the retraction sleeve 2 to the inside of the patient's nasal cavity can be reduced, and the retraction sleeve 2 can be fine-tuned and rotated left and right during the process of being sent into the retraction sleeve 2. On the one hand, the lubricating liquid can be more evenly applied to the inside of the patient's nasal cavity. On the other hand, the retraction sleeve 2 can be more smoothly sent into the patient's nasal cavity by fine-tuning left and right. The diameters of both the liquid outlet 18 and the circulation hole 5 are relatively small, so the amount of lubricant that flows out of the circulation hole 5 is relatively small, thus preventing the patient's nasal breathing from being affected by excessive lubricant outflow. When the large-diameter end of the retractor sleeve 2 is located at the outermost part of the patient's nasal cavity, the retractor sleeve 2 has reached the designated position. At this point, the medical professional can hold the giraffe forceps 1 and insert it into the inner sleeve 12, tracing the center of the inner sleeve 12.The specific process is: first pass through the guide groove 10 and the guide groove 2 11, and observe whether there is a gap in the size of the giraffe forceps 1 when entering the inner cavity of the inner sleeve 12. If there is a gap, it means that the inner diameter of the inner sleeve 12 is larger than the diameter of the giraffe forceps 1, thereby improving the controllability of the giraffe forceps 1 during the insertion process and improving the overall flexibility of the giraffe forceps 1; in addition, the middle position of the outer sleeve 9 and the inner sleeve 12 has an inner cavity, which is hollowed out. When the end of the giraffe forceps 1 directly contacts the inner wall of the inner sleeve 12, the hollow state of the outer sleeve 9 and the inner sleeve 12 can play a buffering role, reducing the force of the outer sleeve 9 contacting the inner sleeve 12, thereby reducing the force transmitted to the inner wall of the retractor sleeve 2, and then reducing the influence of the outer wall of the retractor sleeve 2 on the inner wall of the patient's nasal cavity; in the giraffe forceps 1 When located in guide groove 10 and guide groove 2 11, surgical operations can also be performed on any part of guide groove 10 and guide groove 2 11 by means of advance testing, and the working status of the giraffe forceps 1 can be observed to ensure that the giraffe forceps 1 can operate normally and avoid mechanical failure of the medical instrument during the operation. Finally, the giraffe forceps 1 is passed through the inner wall of the inner sleeve 12 and cooperated with the endoscope to reach the designated position to start the surgical operation. Since the giraffe forceps 1 passes through the inner cavity of the inner sleeve 12, if during the operation, it is necessary to slightly rotate the angle of the giraffe forceps 1 or deflect it by a small angle, under the overall limitation of the inner sleeve 12, the giraffe forceps 1 can be prevented from being deflected too much due to the unstable hand-holding force during the deflection process, which can alleviate the instability of the giraffe forceps 1 during operation and improve the accuracy and efficiency of the operation. During the operation, the inner wall of the retraction sleeve 2 is connected to the outer sleeve 9 by the connecting piece 1 3, the middle connecting piece 15 and the connecting piece 2 6, and there is enough space to ensure the patient's free breathing. If body fluids or blood flow out during the operation, they will first enter the inner wall of the retraction sleeve 2, and those attached to the annular disk 2 8 will also enter the inner wall of the retraction sleeve 2 through the drainage groove. In this way, the body fluids or blood can be concentratedly processed to the greatest extent, thereby improving the efficiency and progress of postoperative cleaning.

[0048] When the retraction sleeve 2 is sent into the patient's nasal cavity, the lubricating liquid begins to flow out when the retraction sleeve 2 enters one-third of the nasal cavity, indicating that there is no lubricating liquid on the outer side of the inner wall of the nasal cavity. Lubricating liquid will appear as the retraction sleeve moves in one-third of the nasal cavity and within. In this way, during the operation, the friction between the retraction sleeve 2 and the outer side of the inner wall of the nasal cavity is greater than the friction between the retraction sleeve 2 and the inner side of the inner wall of the nasal cavity, thereby cooperating with the offset shaking of the giraffe forceps 1 and exerting a squeezing effect on the inner sleeve 12, ensuring that the retraction sleeve 2 is firmly fixed in the patient's nasal cavity. In addition, the patient is in a lying state during the operation, and the retraction sleeve 2 is also in a horizontal and transverse state in the nasal cavity, thereby reducing the possibility of the retraction sleeve 2 falling off from the patient's nasal cavity.

[0049] The lubricating liquid flows out during the process of sending the retraction sleeve 2 into the patient's nasal cavity, which not only reduces the friction between the retraction sleeve 2 and the inner wall of the patient's nasal cavity, but also facilitates the smooth sending of the retraction sleeve 2, and the operation is simple, only needs to pull out the extraction plate 13, and the small capacity of the lubricating liquid flowing out can reduce the discomfort of the patient's nasal cavity, thereby improving the practicability and operability of the device.

[0050] When the long-necked deer forceps 1 slides along the inner wall of the inner sleeve 12, the hollow structure between the connecting piece 1 and the inner sleeve 12 not only buffers the resistance of the long-necked deer forceps 1 and the inner wall of the inner sleeve 12, reduces the resistance pressure on the inner sleeve 12, thereby reducing the resistance pressure between the inner sleeve 12 and the retraction sleeve 2, and further reducing the influence of the retraction sleeve 2 on the inner wall of the nasal cavity, but also in the process of operating the long-necked deer forceps 1, even if the long-necked deer forceps 1 lacks support when it is held by hand, with the limiting effect of the inner sleeve 12, when the long-necked deer forceps 1 deviates or angularly deflects, the long-necked deer forceps 1 can greatly reduce the situation of angular deflection, thereby avoiding the adverse effects on the patient caused by improper operation of the instrument during the operation.

[0051] As Figure 12 and Figure 13 , the outer wall of the circular ring disc 1 is provided with an arc-shaped plate 19, the outer wall of the circular ring disc 1 is provided with a placing groove 20, a plurality of clamping blocks 21 are fixed on the inner wall of the placing groove 20, a clamping groove 22 is formed on the inner wall of the placing groove 20, the one end of the retraction sleeve 2 close to the connecting piece 1 is provided with a plurality of adjusting holes 23, the size of the arc-shaped plate 19 is smaller than the size of the placing groove 20, the clamping blocks 21 are fixedly distributed on the inner wall of the placing groove 20, the size of the clamping groove 22 and the adjusting hole 23 is matched with the size of the two ends of the arc-shaped plate 19, the retraction sleeve 2 is gradually changed in size, the connecting piece 1 is circumferentially arranged on the outer wall of the circular ring disc 1, and the size of the outer sleeve 9 is larger than the size of the inner sleeve 12.

[0052] Through the above structure, before the retraction sleeve 2 is sent into the patient's nasal cavity, the size of the retraction sleeve 2 needs to be adjusted to ensure that the retraction sleeve 2 is matched with the inner size of the patient's nasal cavity, and the large diameter end of the retraction sleeve 2 is compared with the outside of the patient's nasal cavity, if it is found that the large diameter end of the retraction sleeve 2 is larger than the outside of the patient's nasal cavity, the arc-shaped plate 19 is taken out from the inner wall of the placing groove 20, and then there are two ways to adjust, one way is to directly press the fingers on the circular ring disc 1, and then rotate the circular ring disc 1 clockwise through the friction between the fingers and the circular ring disc 1 (as Figure 13The position of the clamping groove 22 is observed whether it corresponds to the position of the adjusting hole 23, and after the adjustment is completed, the retractor sleeve 2 is placed at the large diameter end outside the patient's nasal cavity, and it is roughly observed whether it is suitable, if there is no problem, the position of the circular ring disc 4 is fixed while holding the retractor sleeve 2, one end of the arc-shaped plate 19 is inserted into the inner wall of the clamping groove 22, and the other end is inserted into the inner wall of the adjusting hole 23; Another way is to first take out the arc-shaped plate 19, and clamp and fix one end of the arc-shaped plate 19 in the clamping groove 22, hold the arc-shaped plate 19, rotate the arc-shaped plate 19 while rotating the circular ring disc 4 clockwise, when the circular ring disc 4 rotates, it will drive the outer sleeve 9 fixedly connected to the side of the circular ring disc 4, so that the other end of the outer sleeve 9 is synchronously driven by the circular ring disc 8, and the clamping plate 7 fixed on the circular ring disc 8 will also rotate under the rotation of the outer sleeve 9, and the inner wall of the small diameter end of the retractor sleeve 2 is provided with an adjusting groove, and the clamping plate 7 will be clamped between the adjusting grooves. In the initial state, the position of the clamping plate 7 is located on the right side (as shown in Figure 6 In the process of clockwise rotation of the outer sleeve 9 (as shown in Figure 10 The clamping plate 7 will also rotate from the right side to the left side (as shown in Figure 6 The distance between the adjusting grooves on the inner wall of the small diameter end of the retractor sleeve 2 is much larger than the adjusting hole 23 on the large diameter end of the retractor sleeve 2, and the reason is mainly because the angle of rotation of the large diameter end of the retractor sleeve 2 needs to be several times of the small diameter end to realize, and in order to better ensure that the clamping plate 7 can rotate from the right side to the left side, a weakening portion is provided on the right side of the clamping plate 7 (as shown in Figure 6As shown), during the rotation of the clamping plate 7, the clamping plate 7 will tilt to the right due to the force, and return to its original shape after being clamped into the adjustment groove. In this way, when the clamping groove 22 and the adjustment hole 23 correspond to each other, the clamping plate 7 also corresponds to the adjustment groove, thereby increasing the traction force of the connecting piece 2 6 and the connecting piece 1 3 on the inner wall of the retraction sleeve 2, thereby reducing the size of the entire retraction sleeve 2, and when the large and small diameter ends of the retraction sleeve 2 are clamped and fixed at the same time, it can better ensure that during the operation, the rebound and reset of the retraction sleeve 2 will not directly cause damage to the patient's nasal cavity due to the problem of the large and small diameter ends of the retraction sleeve 2 falling off. After the operation is completed, the fixation between the annular disk 4 and the retraction sleeve 2 is cancelled, and the clamping plate 7 is also reset, and the arc plate 19 is put back into the placement groove 20, and the arc plate 19 is clamped to the inner wall of the placement groove 20 through the clamping block 21. In particular, when special circumstances occur, such as the internal dimensions of the patient's nasal cavity are the same or the internal dimensions of the nasal cavity are large and the external dimensions are small, medical staff need to adjust the large and small diameter ends of the retraction sleeve 2 separately. When adjusting the large diameter end, it is necessary to press the clamping plate 7 of the small diameter end to prevent the two ends of the retraction sleeve 2 from rotating synchronously. In this way, the size of the large diameter end will become smaller, while the small diameter end will remain unchanged. Similarly, the above method is also applicable to the operation of the small diameter end, so that different retraction methods can be flexibly given to different patient groups.

[0053] By providing the arc plate 19, the placement groove 20, the clamping groove 22 and the adjustment hole 23, when the size of the retraction sleeve 2 is not compatible with the size of the patient's nasal cavity, not only can the annular disk 14 be rotated clockwise to change the distance between the connecting piece 13 and the retraction sleeve 2, thereby reducing the overall size of the retraction sleeve 2 and improving the size compatibility with the patient's nasal cavity, but also the two ends of the retraction sleeve 2 can be adjusted separately according to the actual conditions of the nasal cavity of different patients, fully reflecting the flexibility and adaptability of the device.

[0054] The working principle of the technical solution provided by the present invention is as follows:

[0055] The surgical process of transnasal cranial surgery: Before the operation, the patient undergoes an imaging examination, including cranial CT and MRI to determine the location and size of the lesion, and its relationship with surrounding blood vessels, nerves and brain tissue. The nasal passage is evaluated to see if it is suitable for surgery. The nasal hair is removed and the nasal passage is rinsed with saline or antibiotics. Then, medical instruments are prepared, including an endoscopic system and existing retractors, bone rongeurs, curettes, etc. Finally, after the patient is anesthetized, medical instruments are used to resect the lesion and perform skull base reconstruction and nasal packing.

[0056] Before the operation, the medical staff needs to stretch the patient's nasal cavity first, then place the retraction sleeve 2 vertically, making sure that the large diameter end is facing up and the small diameter end is facing down, and then use a syringe to inject the liquid containing lubricant into the liquid reservoir 16 from the liquid injection port 17, and keep it vertical and still, so that the lubricating liquid fully fills the inner cavity of the liquid reservoir 16. At this time, it is possible to observe whether there is liquid overflowing from the liquid outlet 18 through the circulation hole 5 to determine whether the lubricating liquid is in a saturated state. Then the medical staff holds the outer wall of the retraction sleeve 2 horizontally and inserts the small diameter end of the retraction sleeve 2 into the patient's nasal cavity. When the retraction sleeve 2 enters about one-third of the nasal cavity, the extraction plate 13 is pulled, and the bottom of the liquid reservoir 16 is squeezed by the raised part at the end of the extraction plate 13, so that the liquid reservoir 16 is filled with liquid. The lubricating liquid in 6 flows out through the liquid outlet 18 and the circulation hole 5. Since the liquid outlet 18 adopts a structure with a large outside and a small inside, that is, the diameter of the circular hole on the outer wall is large and the diameter of the circular hole on the inner wall is small, the lubricating liquid is not easy to flow out from the liquid reservoir 16 under the action of natural gravity. Instead, it must be squeezed through the convex part at the end of the extraction plate 13 to make the lubricating liquid flow out along the liquid outlet 18 and the circulation hole 5, and finally the lubricating liquid sticks to the surface of the retraction sleeve 2 and the inner wall of the nasal cavity, and then is slowly sent into the retraction sleeve 2 in this way. Since the retraction sleeve 2 is made of medical silicone material that fits the human body as a whole and is used with lubricating liquid, the damage of the outer wall of the retraction sleeve 2 to the inside of the patient's nasal cavity can be reduced, and the retraction sleeve 2 can be fine-tuned and rotated left and right during the process of being sent in, which can make the lubricating liquid The liquid is more evenly applied to the inside of the patient's nasal cavity. On the other hand, the retraction sleeve 2 can be more smoothly delivered to the patient's nasal cavity by fine-tuning left and right. It is worth mentioning that the apertures of the liquid outlet 18 and the circulation hole 5 are both small, so the capacity of the lubricating liquid flowing out of the circulation hole 5 is small, which can avoid affecting the normal breathing of the patient's nasal cavity due to a large outflow of lubricating liquid. When the large-diameter end of the retraction sleeve 2 is located at the outermost side of the patient's nasal cavity, it means that the retraction sleeve 2 as a whole has reached the designated position. At this time, the medical staff can hold the giraffe forceps 1 and enter the inner cavity of the inner sleeve 12 along the middle position of the inner cavity of the inner sleeve 12. The specific process is: first pass through the guide groove 10 and the guide groove 2 11, and observe whether the size of the giraffe forceps 1 is in the inner cavity of the inner sleeve 12. There will be a gap. If there is a gap, it means that the inner diameter of the inner sleeve 12 is larger than the diameter of the giraffe forceps 1, so that the maneuverability of the giraffe forceps 1 during the insertion process can be improved, and the overall flexibility of the giraffe forceps 1 can be improved. In addition, the middle position between the outer sleeve 9 and the inner sleeve 12 is a hollow state. When the end of the giraffe forceps 1 directly contacts the inner wall of the inner sleeve 12, the hollow state of the outer sleeve 9 and the inner sleeve 12 can play a buffering role, reducing the force of the outer sleeve 9 contacting the inner sleeve 12, thereby reducing the force transmitted to the inner wall of the retractor sleeve 2, and then reducing the influence of the outer wall of the retractor sleeve 2 on the inner wall of the patient's nasal cavity. When the giraffe forceps 1 is located in the guide groove 10 and the guide groove 2 11, it can also be tested in advance.The operation is performed on any part of the guide groove one 10 and the guide groove two 11, the working state of the giraffe forceps 1 is observed, so as to ensure that the giraffe forceps 1 can normally work, and the mechanical failure of the medical instrument in the operation process is avoided, finally the giraffe forceps 1 is sent to the specified position through the inner wall of the inner sleeve 12, and the endoscope starts the operation, since the giraffe forceps 1 passes through the inner cavity of the inner sleeve 12, if the angle of the giraffe forceps 1 needs to be slightly turned or the small angle is deviated during the operation, under the limitation of the whole inner sleeve 12, the giraffe forceps 1 can be prevented from being deviated too much due to the instability of the holding force during the deviation, the instability of the giraffe forceps 1 during the operation can be relieved, the accuracy and efficiency of the operation are improved, during the operation, the inner wall of the retractor sleeve 2 and the outer sleeve 9 are connected through the connecting piece one 3, the middle connecting piece 15 and the connecting piece two 6, there is enough gap to ensure the free breathing of the patient, if the body fluid or blood flows out during the operation, it will first enter the inner wall of the retractor sleeve 2, and the body fluid or blood attached to the upper surface of the circular ring disc two 8 will also enter the inner wall of the retractor sleeve 2 through the drainage groove, so the body fluid or blood can be treated to the greatest extent, and the efficiency and progress of the postoperative cleaning are improved.

[0057] It is worth mentioning that when the retractor sleeve 2 is sent into the nasal cavity of the patient, the lubricating liquid begins to flow out only when the retractor sleeve 2 enters one third of the nasal cavity, which indicates that the position of the inner wall of the nasal cavity on the outside is not lubricated, and the position one third of the nasal cavity and inward will appear lubricating liquid along with the movement of the retractor sleeve, so during the operation, the friction between the retractor sleeve 2 and the outside of the inner wall of the nasal cavity is greater than the friction between the retractor sleeve 2 and the inside of the inner wall of the nasal cavity, so that the retractor sleeve 2 can be deviated and shaken with the giraffe forceps 1 and produce extrusion effect on the inner sleeve 12, so as to ensure that the retractor sleeve 2 is firmly fixed in the nasal cavity of the patient, in addition, the patient is in a lying state during the operation, and the retractor sleeve 2 is also in a horizontal state in the nasal cavity, so as to reduce the possibility of the retractor sleeve 2 falling off from the nasal cavity of the patient.

[0058] Before the retractor sleeve 2 is sent into the nasal cavity of the patient, the size of the retractor sleeve 2 needs to be adjusted to ensure that the retractor sleeve 2 is matched with the inner size of the nasal cavity of the patient, the large diameter end of the retractor sleeve 2 is compared with the outside of the nasal cavity of the patient, if it is found that the large diameter end of the retractor sleeve 2 is larger than the outside of the nasal cavity of the patient, the arc plate 19 is taken out from the inner wall of the placing groove 20, and there are two ways to adjust, one way is to directly press the circular ring disc one 4 with fingers, and then rotate the circular ring disc one 4 clockwise through the friction between the fingers and the circular ring disc one 4 (as shown in Figure 13As shown), observe whether the position of the snap-fit ​​groove 22 corresponds to the position of the adjustment hole 23. After the adjustment is completed, place the end of the retractor sleeve 2 with the larger diameter on the outside of the patient's nasal cavity and roughly observe whether it fits. If there is no problem, hold the retractor sleeve 2 while fixing the position of the ring disk 4, insert one end of the arc plate 19 into the inner wall of the snap-fit ​​groove 22, and insert the other end into the inner wall of the adjustment hole 23. Another way is to first take out the arc plate 19, and snap-fit ​​one end of the arc plate 19 into the snap-fit ​​groove 22, and hold it in the arc plate 19. On the plate 19, rotating the arc plate 19 will drive the ring disk 1 4 to rotate clockwise. When the ring disk 1 4 is rotating, it will drive the outer sleeve 9 fixedly connected to the side of the ring disk 1 4, so that the ring disk 2 8 at the other end of the outer sleeve 9 is driven synchronously, and a clamping plate 7 is fixed on the ring disk 2 8. The clamping plate 7 will also rotate under the rotation of the outer sleeve 9, and an adjustment groove is provided on the inner wall of the small diameter end of the pull-open sleeve 2. The clamping plate 7 will be clamped with each other between the adjustment grooves. In the initial state, the position of the clamping plate 7 is located on the right side (as shown in FIG. Figure 6 As shown), during the clockwise rotation of the outer sleeve 9 (as shown Figure 10 As shown), the clamping plate 7 will also rotate from the right to the left (as shown Figure 6 As shown), the spacing between the adjustment grooves on the inner wall of the small diameter end of the retraction sleeve 2 is much larger than the adjustment hole 23 on the large diameter end of the retraction sleeve 2. The main reason is that the rotation angle of the large diameter end of the retraction sleeve 2 requires the small diameter end to rotate several times to achieve it. In order to better ensure that the clamping plate 7 can rotate from the right to the left, a weakened portion is provided on the right side of the clamping plate 7 (as shown). Figure 6As shown in the figure), so in the process of rotating the clamping plate 7, the clamping plate 7 will be tilted to the right due to the force, and restore to its original shape after clamping into the adjusting groove, so when the clamping groove 22 and the adjusting hole 23 correspond to each other, the clamping plate 7 also corresponds to the adjusting groove, so as to improve the traction of the connecting piece two 6 and the connecting piece one 3 on the inner wall of the retractor sleeve 2, thereby reducing the size of the entire retractor sleeve 2, and in the case of clamping and fixing the large diameter end of the retractor sleeve 2, it can better ensure that the retractor sleeve 2 will not be damaged due to the rebounding of the retractor sleeve 2 caused by the clamping and falling off of the large diameter end of the retractor sleeve 2 during the operation, after the operation is completed, the fixation between the circular ring disc one 4 and the retractor sleeve 2 is cancelled, the clamping plate 7 is also reset, the arc-shaped plate 19 is placed back into the placing groove 20, and the arc-shaped plate 19 is clamped on the inner wall of the placing groove 20 through the clamping block 21, especially, in special cases, such as when the size of the patient's nasal cavity is the same or the size of the patient's nasal cavity is large and the size of the patient's nasal cavity is small, the medical staff needs to adjust the large diameter end of the retractor sleeve 2 alone, when adjusting the large diameter end, the clamping plate 7 of the small diameter end needs to be pressed to prevent the two ends of the retractor sleeve 2 from rotating synchronously, so that the size of the large diameter end will become smaller, and the size of the small diameter end will not change, and the above-mentioned method is also applicable to the operation of the small diameter end, so that different retraction methods can be given to different patient groups.

[0059] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0060] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can also be made, which should be regarded as the protection scope of the present application.

Claims

1. A retraction device for transnasal cranial surgery, comprising a giraffe clamp, characterized in that: An inner sleeve is installed on the outer wall of the giraffe pliers, and an outer sleeve is fixedly connected to the outer wall of the inner sleeve. A guide groove 2 is opened at the end of the inner sleeve, and a guide groove 1 is fixedly connected to the end of the outer sleeve. A circular ring disk 1 is fixedly connected to the end of the outer sleeve, and a connecting piece 1 is fixedly connected to the outer wall of the circular ring disk 1. A traction sleeve is fixedly connected to the connecting piece 1 away from the outer wall of the circular ring disk 1, and an auxiliary traction assembly is connected to the traction sleeve.

2. The retraction device for transnasal cranial surgery according to claim 1, characterized in that: The auxiliary retraction assembly includes a flow hole opened on the outer wall of the retraction sleeve, the end of the retraction sleeve away from the connecting piece 1 is fixedly connected to the connecting piece 2, the end of the retraction sleeve close to the connecting piece 2 is installed with a clamping plate, and the end of the connecting piece 2 away from the retraction sleeve is fixedly connected to the annular disk 2.

3. The retraction device for transnasal cranial surgery according to claim 2, characterized in that: An extraction plate is slidably connected to the inner wall of the retraction sleeve, a drainage hole is installed at the end of the retraction sleeve away from the connecting piece 1, and a middle connecting piece is fixedly connected to the middle position of the outer wall of the outer sleeve.

4. The retraction device for transnasal cranial surgery according to claim 3, characterized in that: The outer wall of the extraction plate is slidably connected with a liquid storage bag, the end of the liquid storage bag close to the first connecting piece is provided with a plurality of liquid injection ports, and the outer wall of the liquid storage bag is provided with a plurality of liquid outlets.

5. The retraction device for transnasal cranial surgery according to claim 4, characterized in that: An arc-shaped plate is installed on the outer wall of the annular disk one, a placement groove is opened on the outer wall of the annular disk one, a plurality of clamping blocks are fixed on the inner wall of the placement groove, a clamping groove is opened on the inner wall of the placement groove, and a plurality of adjustment holes are opened on the end of the retraction sleeve close to the connecting plate one.

6. The retraction device for transnasal cranial surgery according to claim 2, characterized in that: The linear array of flow holes is distributed on the outer wall of the retraction sleeve, the circumferential array of the connecting plates is distributed on the outer wall of the annular disk 2, a plurality of lightweight holes are opened on the outer wall of the annular disk 2, and a weakening groove is opened in the middle position of the clamping plate.

7. The retraction device for transnasal cranial surgery according to claim 3, characterized in that: The extraction plates are symmetrically distributed on both sides of the retraction sleeve, the drainage holes are distributed in a circular array at one end of the retraction sleeve close to the second connecting piece, one end of the middle connecting piece is fixedly connected to the middle position of the outer wall of the outer sleeve, and the other end of the middle connecting piece is fixedly connected to the middle position of the inner wall of the retraction sleeve.

8. The retraction device for transnasal cranial surgery according to claim 4, characterized in that: The liquid storage bag is made of rubber, and the pore size distribution of the liquid injection port and the liquid outlet is larger on the outside and smaller on the inside.

9. The retraction device for transnasal cranial surgery according to claim 5, characterized in that: The size of the arc plate is smaller than that of the placement groove, the clamping blocks are fixedly distributed on the inner wall of the placement groove, and the sizes of the clamping groove and the adjustment hole are adapted to the sizes of both ends of the arc plate.

10. The retraction device for transnasal cranial surgery according to claim 1, characterized in that: The retraction sleeve has a gradual size as a whole, the connecting pieces are distributed in a circular array on the outer wall of the annular disk, and the size of the outer sleeve is larger than that of the inner sleeve.

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