Nasal cranial operation retractor

Abstract

The application provides a nasal craniocerebral surgery retractor, and belongs to the technical field of medical machinery. The retractor comprises a giraffe clamp, an inner sleeve is mounted on the outer wall of the giraffe clamp, a retraction sleeve is fixedly connected to the outer wall of the connecting piece away from the ring disc, an auxiliary retraction assembly is used in cooperation with the giraffe clamp during the surgery of a patient, and the auxiliary retraction assembly is connected with the retraction sleeve. The auxiliary retraction assembly is arranged, so that the smoothness of placing the giraffe clamp by medical staff is improved, the giraffe clamp is accurately sent to a specified position in the nasal cavity, the efficiency of the surgery is improved, the giraffe clamp does not contact the inner wall of the nasal cavity during the sending process, the giraffe clamp can avoid tearing or scratching the mucosa of the inner wall of the nasal cavity, mucosal hyperemia and swelling are effectively prevented, the nasal cavity channel is less narrowed, the difficulty of sending the giraffe clamp and other instruments is reduced, and the effectiveness of endoscopic observation is ensured.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a retraction device for transnasal craniotomy. Background Technology

[0002] Retraction devices used in transnasal craniotomy are a type of medical device specifically designed for transnasal endoscopic skull base surgery. Their core function is to physically open or maintain the anatomical passages of the nasal cavity, sinuses, and skull base surgical area, providing a stable and clear field of vision and sufficient operating space for the surgical procedure, while reducing compression or damage to surrounding normal tissues (such as nasal mucosa, turbinates, blood vessels, and nerves). Common medical devices include curette suction devices, probes, giraffe forceps, and mushroom-head forceps.

[0003] Before performing surgery, medical staff need to open the nasal cavity using retraction instruments (such as a nasal speculum), then insert an endoscope into the nostril to explore the internal structure of the nasal cavity. At the same time, other instruments are used to clean the inside of the patient's nasal cavity to ensure that the nasal passage is clean and unobstructed. Then, the medical staff slowly inserts giraffe forceps into the patient's nasal cavity, using the endoscope to guide them to the designated position for operation. During the insertion of the giraffe forceps, because the size of the nasal speculum occupies a certain amount of space inside the nasal cavity, even after the nasal cavity has been opened, the internal space of the patient's nasal cavity is still limited. In this case, the tip of the giraffe forceps will inevitably touch the inside of the patient's nasal cavity during the movement. In addition, the inner wall of the nasal cavity is relatively fragile. Once it is touched by the giraffe forceps, it may cause tearing or abrasion of the nasal cavity mucosa. If the inner wall of the nasal cavity is touched repeatedly, it will not only stimulate the mucosa to become congested and swollen, further narrowing the nasal passage, but also increase the difficulty of inserting instruments such as the giraffe forceps, thus affecting the observation effect of the endoscope. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a retraction device for transnasal craniotomy. By incorporating an auxiliary retraction component, it improves the ease with which medical personnel can place giraffe forceps, ensuring accurate delivery of the forceps to the designated position within the nasal cavity. Furthermore, it avoids tearing or abrasion of the nasal mucosa caused by the forceps, prevents mucosal congestion and swelling, reduces narrowing of the nasal passage and difficulty in inserting instruments such as giraffe forceps, and ensures the effectiveness of endoscopic observation. This design addresses the problem that existing giraffe forceps, when their tips touch the patient's nasal cavity, may cause tearing or abrasion of the nasal mucosa. Repeated contact with the nasal cavity wall can stimulate mucosal congestion and swelling, narrowing the nasal passage and increasing the difficulty of inserting instruments such as giraffe forceps, thus affecting the endoscopic observation results.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A retraction device for transnasal craniotomy includes giraffe forceps. An inner sleeve is installed on the outer wall of the giraffe forceps. An outer sleeve is fixedly connected to the outer wall of the inner sleeve. A second guide groove is provided at the end of the inner sleeve. A first guide groove is fixedly connected to the end of the outer sleeve. A first annular disk is fixedly connected to the end of the outer sleeve. A first connecting piece is fixedly connected to the outer wall of the first annular disk. A retraction sleeve is fixedly connected to the first connecting piece away from the outer wall of the first annular disk. An auxiliary retraction component is connected to the retraction sleeve.

[0007] Optionally, the auxiliary retraction assembly includes a flow hole formed on the outer wall of the retraction sleeve, a connecting piece two is fixedly connected to the end of the retraction sleeve away from the connecting piece one, a snap-fit ​​plate is installed at the end of the retraction sleeve close to the connecting piece two, and a circular disc two is fixedly connected to the end of the connecting piece two away from the retraction sleeve.

[0008] Optionally, an extraction plate is slidably connected to the inner wall of the retracting sleeve, a drainage hole is installed at the end of the retracting sleeve away from the connecting piece, 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 bladder is slidably connected to the outer wall of the extraction plate, and a plurality of liquid injection ports are provided at the end of the liquid storage bladder near the connecting piece one, and a plurality of liquid outlet ports are provided on the outer wall of the liquid storage bladder.

[0010] Optionally, an arc-shaped plate is installed on the outer wall of the first annular disk, a placement groove is formed on the outer wall of the first annular disk, a plurality of snap-fit ​​blocks are fixed on the inner wall of the placement groove, a snap-fit ​​groove is formed on the inner wall of the placement groove, and a plurality of adjustment holes are formed on the end of the pull-opening sleeve near the first connecting piece.

[0011] Optionally, the flow holes are linearly arrayed on the outer wall of the pull-out sleeve, the connecting pieces are circumferentially arrayed on the outer wall of the annular disk, the annular disk has a plurality of lightweight holes on its outer wall, and the snap-fit ​​plate has a weakening groove in the middle position.

[0012] Optionally, the extraction plates are symmetrically distributed on both sides of the retracting sleeve, the drainage holes are arranged in a circumferential array at one end of the retracting sleeve near 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 retracting sleeve.

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

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

[0015] Optionally, the pull-out sleeve has a gradually changing size, the connecting pieces are arranged in a circumferential array on the outer wall of the annular disk, and the outer sleeve is larger than the inner sleeve.

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

[0017] In the above-mentioned scheme, by setting up an auxiliary retraction component, not only can the smoothness of giraffe forceps placement by medical staff be improved, ensuring that the giraffe forceps are accurately delivered to the designated position in the nasal cavity, thereby improving the efficiency of the operation, but also, during the insertion of the giraffe forceps, they will not come into contact with the inner wall of the patient's nasal cavity, but only with the inner wall of the auxiliary retraction component. This can avoid the giraffe forceps causing tearing or abrasion to the nasal cavity mucosa. In addition, even if the giraffe forceps come into contact with the auxiliary retraction component multiple times, it will not cause the auxiliary retraction component to affect the nasal cavity mucosa, effectively preventing mucosal congestion and swelling, reducing nasal passage narrowing and difficulties in inserting instruments such as giraffe forceps, and ensuring the effectiveness of endoscopic observation.

[0018] By incorporating an extraction plate, a reservoir, an injection port, and an outlet in the auxiliary retraction assembly, lubricating fluid flows out during the insertion of the retraction sleeve 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 smooth insertion of the retraction sleeve, but also simplifies operation. Simply pull the extraction plate outwards. Simultaneously, the lubricating fluid flows out in small volumes, reducing discomfort to the patient's nasal cavity and improving the device's practicality and operability.

[0019] By incorporating an outer sleeve, guide groove one, guide groove two, and inner sleeve into the auxiliary retraction assembly, when the giraffe forceps slides along the inner wall of the inner sleeve, the hollow structure between the connecting piece one and the inner sleeve not only buffers the contact force between the giraffe forceps and the inner wall of the inner sleeve, reducing the contact pressure acting on the inner sleeve, thereby reducing the contact pressure between the inner sleeve and the retraction sleeve, and thus reducing the impact of the retraction sleeve on the nasal cavity wall, but also, during the operation of the giraffe forceps, even if there is a lack of support when holding the giraffe forceps, the limiting effect of the inner sleeve can significantly reduce the possibility of excessive angular deflection of the giraffe forceps, thus avoiding adverse effects on the patient due to improper instrument operation during surgery.

[0020] By incorporating an arc-shaped plate, placement groove, snap-fit ​​groove, and adjustment hole, when the size of the retraction sleeve does not match the size of the patient's nasal cavity, the device can not only rotate the first annular disc clockwise to change the distance between the first connecting piece and the retraction sleeve, thereby reducing the overall size of the retraction sleeve and improving its fit with the patient's nasal cavity, but also adjust both ends of the retraction sleeve separately according to the actual situation of different patients' nasal cavities, fully demonstrating the flexibility and adaptability of the device. Attached Figure Description

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

[0022] Figure 1 A three-dimensional structural diagram of a retraction device used in transnasal craniotomy.

[0023] Figure 2 A cross-sectional three-dimensional structural diagram of a retraction device used in transnasal craniotomy.

[0024] Figure 3 A first-view magnified three-dimensional structural diagram to aid in the opening of the component;

[0025] Figure 4 A second-view magnified structural diagram of the auxiliary traction component;

[0026] Figure 5 A first-view magnified three-dimensional structural diagram to aid in the separation of the component cross-section;

[0027] Figure 6 A second-view magnified structural diagram of the component cross-section to assist in opening the structure;

[0028] Figure 7 A magnified three-dimensional structural diagram to aid in separating the exploded components;

[0029] Figure 8 A three-dimensional magnified structural diagram of the reservoir, injection port, and outlet;

[0030] Figure 9 A three-dimensional magnified schematic diagram of the extraction plate, liquid storage bladder, and liquid outlet;

[0031] Figure 10 This is a magnified three-dimensional structural diagram of the two-dimensional ring disk, the outer sleeve, and the middle connecting piece;

[0032] Figure 11 This is a magnified three-dimensional structural diagram of the outer sleeve, guide groove one, and guide groove two.

[0033] Figure 12 A three-dimensional enlarged structural diagram of the pull-out sleeve and snap-fit ​​plate;

[0034] Figure 13 for Figure 12 A magnified three-dimensional structural diagram of point A in the middle.

[0035] Figure label:

[0036] 1. Giraffe clamps; 2. Retraction sleeve; 3. Connecting piece one; 4. Circular disc one; 5. Flow hole; 6. Connecting piece two; 7. Snap-fit ​​plate; 8. Circular disc two; 9. Outer sleeve; 10. Guide groove one; 11. Guide groove two; 12. Inner sleeve; 13. Extraction plate; 14. Drainage hole; 15. Middle connecting piece; 16. Liquid reservoir; 17. Injection port; 18. Outlet port; 19. Arc plate; 20. Placement groove; 21. Snap-fit ​​block; 22. Snap-fit ​​groove; 23. Adjustment hole.

[0037] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0038] The present invention provides a retraction device for transnasal craniotomy with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0039] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

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

[0041] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0042] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0043] like Figures 1 to 13 As shown, an embodiment of the present invention provides a retraction device for transnasal craniotomy, including giraffe forceps 1, as... Figure 5 As shown, the outer wall of the giraffe clamp 1 is fitted with an inner sleeve 12, and an outer sleeve 9 is fixedly connected to the outer wall of the inner sleeve 12. A guide groove 11 is provided at the end of the inner sleeve 12, and a guide groove 10 is fixedly connected to the end of the outer sleeve 9. A circular disc 4 is fixedly connected to the end of the outer sleeve 9. A connecting piece 3 is fixedly connected to the outer wall of the circular disc 4. The connecting pieces 3 are arranged in a circumferential array on the outer wall of the circular disc 4. A retraction sleeve 2 is fixedly connected to the connecting piece 3 away from the outer wall of the circular disc 4. The auxiliary retraction component is used in conjunction with the giraffe forceps 1 during the patient's surgery. The auxiliary retraction component is connected to the retraction sleeve 2. The retraction sleeve 2 has a gradient size, with the outer sleeve 9 being larger than the inner sleeve 12. The retraction sleeve 2 is made of medical-grade silicone to fit the human body. One end of the retraction sleeve 2 has a large diameter, and the other end has a small diameter. 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 procedure for transnasal craniocerebral surgery is as follows: Preoperative imaging examinations are performed on the patient, including cranial CT and MRI to determine the location, size, and relationship of the lesion with surrounding blood vessels, nerves, and brain tissue. The suitability of the nasal passage for surgery is assessed. Nasal hairs are removed and the nasal cavity is irrigated with saline or antibiotics. Then, medical instruments are prepared, including the endoscope system and existing retractors, bone forceps, curettes, etc. Finally, after the patient is anesthetized, medical instruments are used to remove the lesion and perform skull base reconstruction and nasal packing.

[0045] By setting up an auxiliary retraction component, not only can the smoothness of giraffe forceps 1 be improved by medical staff, ensuring that giraffe forceps 1 is accurately delivered to the designated position in the nasal cavity, thereby improving the efficiency of the operation, but also the giraffe forceps 1 will not come into contact with the inner wall of the patient's nasal cavity during the insertion process, but will only come into contact with the inner wall of the auxiliary retraction component. This can avoid the giraffe forceps 1 causing tearing or abrasion to the nasal cavity mucosa. In addition, even if the giraffe forceps 1 comes into contact with the auxiliary retraction component multiple times, it will not cause the auxiliary retraction component to affect the nasal cavity mucosa, effectively preventing mucosal congestion and swelling, reducing nasal passage narrowing and difficulties in inserting instruments such as giraffe forceps 1, and ensuring the effectiveness of endoscopic observation.

[0046] like Figure 4 As shown, the auxiliary retraction assembly includes a flow hole 5 formed on the outer wall of the retraction sleeve 2. A connecting piece 6 is fixedly connected to the end of the retraction sleeve 2 away from the connecting piece 3. A snap-fit ​​plate 7 is installed at the end of the retraction sleeve 2 near the connecting piece 6. A circular disc 8 is fixedly connected to the end of the connecting piece 6 away from the retraction sleeve 2. Figures 5 to 7 As shown, an extraction plate 13 is slidably connected to the inner wall of the pull-out sleeve 2, a drainage hole 14 is installed at the end of the pull-out 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 reservoir 16 is installed between the extraction plate 13 and the retracting sleeve 2. When the extraction plate 13 is pulled out, the top of the extraction plate 13 presses against the bottom of the reservoir 16. Specifically, the reservoir 16 is fixed in the sliding groove of the inner cavity of the top of the retracting sleeve 2, the extraction plate 13 slides in the inner cavity of the top of the retracting sleeve 2, and the extraction plate 13 is designed with a protrusion at the small diameter end of the retracting sleeve 2. The reservoir 16 has several injection ports 17 at the end near the connecting piece 3, and several outlet ports 18 are provided on the outer wall of the reservoir 16. The flow holes 5 are linearly arrayed on the outer wall of the pull-back sleeve 2. The connecting pieces 6 are circumferentially arrayed on the outer wall of the annular disk 8. Several lightweight holes are opened on the outer wall of the annular disk 8. A weakening groove is opened in the middle of the snap-fit ​​plate 7. The extraction plates 13 are symmetrically distributed on both sides of the pull-back sleeve 2. The drainage holes 14 are circumferentially arrayed on one end of the pull-back sleeve 2 near the connecting piece 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 pull-back sleeve 2. The liquid storage bladder 16 is made of rubber. The diameter distribution of the injection port 17 and the outlet port 18 is that the outer diameter is larger than the inner diameter. The size of the flow holes 5 and the outlet port 18 are the same. The sizes and positions are the same. The size of connecting piece 13 is larger than that of connecting piece 15, which is larger than that of connecting piece 26. The top of the snap-fit ​​plate 7 contacts the inner wall of the pull-away sleeve 2. Three adjustment grooves are arranged in a circumferential array inside the pull-away sleeve 2, and their size is the same as that of the top of the snap-fit ​​plate 7. Six drainage grooves are arranged in a circumferential array on the outer wall of the annular disc 28. The inner sleeve 12 is fixedly fitted onto the inner wall of the outer sleeve 9. The guide groove 10 and the guide groove 21 are both opened 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 pull-away 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] With the above structure, before surgery, medical staff need to first open the patient's nasal cavity, then place the retractor sleeve 2 horizontally (with the axis of the retractor sleeve 2 horizontal), with the reservoir 16 facing upwards. Next, use a syringe to inject liquid containing lubricant into the reservoir 16 through the injection port 17, keeping it vertical and still to fully fill the inner cavity of the reservoir 16 with lubricant. At this time, observe through the flow hole 5 whether there is liquid overflowing from the outlet 18 to determine if the lubricant is saturated. Then, the medical staff hold the retractor sleeve 2 horizontally against the outer wall and insert the small-diameter end of the retractor sleeve 2 into the patient's nasal cavity. When the retractor sleeve 2 has entered about one-third of the nasal cavity, begin to pull the extraction plate 13. The protrusion at the end of the extraction plate 13 squeezes the bottom of the reservoir 16, causing the lubricant inside the reservoir 16 to flow out through the outlet 18 and the flow hole 5. The device 18 adopts a structure with a larger outer diameter and a smaller inner diameter, meaning the outer wall has a larger diameter circular hole and the inner wall has a smaller diameter circular hole. Given the viscosity of the lubricant, it is difficult for the lubricant to flow out of the reservoir 16 under gravity. The lubricant is forced out through the protrusion at the end of the extraction plate 13, flowing out along the outlet 18 and the flow hole 5. This causes the lubricant to adhere to the surface of the retractor sleeve 2 and the inner wall of the nasal cavity. The retractor sleeve 2 is then slowly inserted in this manner. Because the retractor sleeve 2 is made of medical-grade silicone that conforms to the human body and is used in conjunction with the lubricant, it reduces damage to the patient's nasal cavity from the outer wall of the retractor sleeve 2. Furthermore, the retractor sleeve 2 can be slightly adjusted left and right during insertion. This allows the lubricant to be applied more evenly to the patient's nasal cavity, and the slight left and right adjustments facilitate the insertion of the retractor sleeve 2 into the patient's nasal cavity. Both the outlet 18 and the flow hole 5 have small diameters, so the amount of lubricating fluid flowing out of the flow hole 5 is small, which can avoid affecting the patient's normal breathing due to excessive lubricating fluid outflow. When the large-diameter end of the retractor sleeve 2 is located at the outermost side of the patient's nasal cavity, it means that the entire retractor sleeve 2 has reached the designated position. At this time, 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.The specific process is as follows: First, the giraffe forceps 1 passes through guide groove 10 and guide groove 2 11 to observe whether there is a gap when it enters 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. This improves the maneuverability of the giraffe forceps 1 during insertion and enhances its overall flexibility. In addition, the outer sleeve 9 and the inner sleeve 12 have an inner cavity in the middle, which is hollow. When the end of the giraffe forceps 1 directly abuts against the inner wall of the inner sleeve 12, the hollow state of the outer sleeve 9 and the inner sleeve 12 can act as a buffer, reducing the force of the outer sleeve 9 contacting the inner sleeve 12, thereby reducing the force transmitted to the inner wall of the retraction sleeve 2, and thus reducing the impact of the retraction sleeve 2 on the inner wall of the patient's nasal cavity. When the giraffe forceps are located in guide slot 10 and guide slot 2 11, surgical operations can be performed on any part of guide slot 10 and guide slot 2 11 in advance to observe the working status of the giraffe forceps 1, thereby ensuring that the giraffe forceps 1 can work normally and avoiding mechanical failure of medical instruments during the operation. Finally, the giraffe forceps 1 is passed through the inner wall of the inner sleeve 12 and, together with the endoscope, reaches the designated position to start the operation. Since the giraffe forceps 1 passes through the inner cavity of the inner sleeve 12, if it is necessary to slightly rotate the angle of the giraffe forceps 1 or make a small deviation during the operation, the inner sleeve 12 can limit the giraffe forceps 1 to prevent the deviation angle from being too large due to the instability of the hand grip during the deviation process. This can alleviate the instability of the giraffe forceps 1 during the operation and improve the accuracy and efficiency of the operation. During the surgery, the inner wall of the retractor sleeve 2 and the outer sleeve 9 are connected by connecting piece 1 3, middle connecting piece 15 and connecting piece 2 6, with sufficient gaps to ensure the patient's free breathing. If there is any leakage of body fluid or blood during the surgery, it will first enter the inner wall of the retractor sleeve 2, while the fluid adhering to the annular disc 2 8 will also enter the inner wall of the retractor sleeve 2 through the drainage groove. This can maximize the centralized treatment of body fluid or blood, improving the efficiency and progress of postoperative cleaning.

[0048] When the retractor sleeve 2 is inserted into the patient's nasal cavity, lubricant begins to flow out only when it has entered one-third of the nasal cavity. This indicates that there is no lubricant on the outer side of the nasal cavity wall. Lubricant will appear in the one-third and inner part of the nasal cavity as the retractor sleeve moves. Thus, during the operation, the friction between the retractor sleeve 2 and the outer side of the nasal cavity wall is greater than the friction between the retractor sleeve 2 and the inner side of the nasal cavity wall. This allows the giraffe forceps 1 to be tilted and squeezed to ensure that the retractor sleeve 2 is firmly fixed in the patient's nasal cavity. In addition, the patient is in a supine position during the operation, and the retractor sleeve 2 is also in a horizontal position in the nasal cavity, which reduces the possibility of the retractor sleeve 2 falling out of the patient's nasal cavity.

[0049] By incorporating an extraction plate 13, a reservoir 16, an injection port 17, and an outlet 18 into the auxiliary retraction assembly, lubricating fluid flows out during the insertion of the retraction sleeve 2 into the patient's nasal cavity. This not only reduces the friction between the retraction sleeve 2 and the inner wall of the patient's nasal cavity, facilitating the smooth insertion of the retraction sleeve 2, but also simplifies operation. Simply pull the extraction plate 13 outwards. Simultaneously, the lubricating fluid flows out in a small volume, reducing discomfort to the patient's nasal cavity and improving the device's practicality and operability.

[0050] By incorporating an outer sleeve 9, a guide groove 10, a guide groove 2 11, and an inner sleeve 12 into the auxiliary retraction assembly, when the giraffe forceps 1 slides along the inner wall of the inner sleeve 12, the hollow structure between the connecting piece 1 3 and the inner sleeve 12 not only buffers the contact force between the giraffe forceps 1 and the inner wall of the inner sleeve 12, reducing the contact pressure on the inner sleeve 12, thereby reducing the contact pressure between the inner sleeve 12 and the retraction sleeve 2, and thus reducing the impact of the retraction sleeve 2 on the nasal cavity wall, but also, during the operation of the giraffe forceps 1, even if there is a lack of support when holding the giraffe forceps 1, the limiting effect of the inner sleeve 12 can significantly reduce the situation where the giraffe forceps 1 deviates or its angle deflects, thereby avoiding adverse effects on the patient due to improper instrument operation during surgery.

[0051] like Figure 12 and Figure 13 An arc-shaped plate 19 is installed on the outer wall of the annular disk 4. A placement groove 20 is opened on the outer wall of the annular disk 4. Several snap-fit ​​blocks 21 are fixed on the inner wall of the placement groove 20. A snap-fit ​​groove 22 is opened on the inner wall of the placement groove 20. Several adjustment holes 23 are opened at one end of the pull-opening sleeve 2 near the connecting piece 3. The size of the arc-shaped plate 19 is smaller than the size of the placement groove 20. The snap-fit ​​blocks 21 are fixedly distributed on the inner wall of the placement groove 20. The size of the snap-fit ​​groove 22 and the adjustment holes 23 are adapted to the size of both ends of the arc-shaped plate 19. The pull-opening sleeve 2 has a gradually changing size. The connecting piece 3 is distributed in a circumferential array on the outer wall of the annular disk 4. The size of the outer sleeve 9 is larger than the size of the inner sleeve 12.

[0052] With the above structure, before inserting the retractor sleeve 2 into the patient's nasal cavity, the size of the retractor sleeve 2 needs to be adjusted to ensure that the retractor sleeve 2 matches the inner size of the patient's nasal cavity. A simple comparison is made between the large-diameter end of the retractor sleeve 2 and the outer side of the patient's nasal cavity. If it is found that the large-diameter end of the retractor sleeve 2 is larger than the outer side of the patient's nasal cavity, the arc plate 19 is removed from the inner wall of the placement groove 20. Then, there are two ways to adjust it. One way is to directly press the finger on the annular disc 4, and then rotate the annular disc 4 clockwise through the friction between the finger and the annular disc 4 (e.g., ...). Figure 13As shown), observe whether the position of the snap-fit ​​groove 22 corresponds to the position of the adjustment hole 23. After adjustment, place the larger diameter end of the pull-back sleeve 2 on the outside of the patient's nasal cavity and roughly observe whether it fits. If there is no problem, hold the pull-back sleeve 2 while fixing the position of the annular disc 4, insert one end of the arc plate 19 into the inner wall of the snap-fit ​​groove 22, and the other end into the inner wall of the adjustment hole 23; another method is to first remove the arc plate 19 and snap-fit ​​one end of the arc plate 19 into the snap-fit ​​groove 22. Inside the groove 22, holding the arc-shaped plate 19, rotating the arc-shaped plate 19 will cause the annular disk 4 to rotate clockwise. As the annular disk 4 rotates, it will drive the outer sleeve 9, which is fixedly connected to the side of the annular disk 4, causing the annular disk 8 at the other end of the outer sleeve 9 to rotate synchronously. A snap-fit ​​plate 7 is fixed on the annular disk 8. The snap-fit ​​plate 7 also rotates as the outer sleeve 9 rotates, and opens the adjustment groove on the inner wall of the small-diameter end of the sleeve 2. The snap-fit ​​plate 7 will engage with the adjustment groove. In the initial state, the snap-fit ​​plate 7 is located on the right side (e.g., Figure 6 As shown), during the clockwise rotation of the outer sleeve 9 (as shown), Figure 10 As shown), the snap-fit ​​plate 7 will also rotate from right to left (as shown). Figure 6 As shown), the spacing between the adjusting grooves on the inner wall of the small-diameter end of the pull-out sleeve 2 is much larger than the adjusting hole 23 on the large-diameter end of the pull-out sleeve 2. The main reason is that the rotation angle of the large-diameter end of the pull-out sleeve 2 requires the small-diameter end to rotate several times. In order to better ensure that the snap-fit ​​plate 7 can rotate from the right to the left, a weakening part (such as...) is provided on the right side of the snap-fit ​​plate 7. Figure 6As shown, during the rotation of the snap-fit ​​plate 7, the snap-fit ​​plate 7 will tilt to the right due to the force, and return to its original shape after snapping into the adjustment groove. Thus, when the snap-fit ​​groove 22 corresponds to the adjustment hole 23, the snap-fit ​​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. Furthermore, with the large and small diameter ends of the retraction sleeve 2 snapped and fixed at the same time, it can better ensure that during the operation, the problem of the large and small diameter ends of the retraction sleeve 2 falling off will not directly cause the retraction sleeve 2 to rebound and reset, causing damage to the patient's nasal cavity. After the surgery, the fixation between the circular disc 4 and the retraction sleeve 2 is removed, and the locking plate 7 is also reset. The arc plate 19 is placed back into the placement groove 20, and the arc plate 19 is locked onto the inner wall of the placement groove 20 by the locking block 21. In particular, when special situations occur, such as when the internal dimensions of the patient's nasal cavity are all 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, the locking plate 7 of the small diameter end needs to be pressed to prevent the two ends of the retraction sleeve 2 from rotating synchronously. This will result in the large diameter end becoming smaller while the small diameter end remains unchanged. Similarly, the above method also applies to the operation of the small diameter end. In this way, different retraction methods can be provided flexibly for different patient groups.

[0053] By setting up the arc plate 19, placement groove 20, snap-fit ​​groove 22 and adjustment hole 23, when the size of the retraction sleeve 2 does not match the size of the patient's nasal cavity, the annular disk 4 can be rotated clockwise to change the distance between the connecting piece 3 and the retraction sleeve 2, thereby reducing the overall size of the retraction sleeve 2 and improving its fit with the patient's nasal cavity. Furthermore, the two ends of the retraction sleeve 2 can be adjusted separately according to the actual situation of different patients' nasal cavities, fully demonstrating the flexibility and adaptability of the device.

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

[0055] The procedure for transnasal craniocerebral surgery is as follows: Preoperative imaging examinations are performed on the patient, including cranial CT and MRI to determine the location, size, and relationship of the lesion with surrounding blood vessels, nerves, and brain tissue. The suitability of the nasal passage for surgery is assessed. Nasal hairs are removed and the nasal cavity is irrigated with saline or antibiotics. Then, medical instruments are prepared, including the endoscope system and existing retractors, bone forceps, curettes, etc. Finally, after the patient is anesthetized, medical instruments are used to remove the lesion and perform skull base reconstruction and nasal packing.

[0056] Before the surgery, medical staff need to open the patient's nasal cavity, then place the retractor sleeve 2 vertically, ensuring the larger diameter end is facing upwards and the smaller diameter end is facing downwards. Next, use a syringe to inject liquid containing lubricant into the reservoir 16 through the injection port 17, keeping it vertical and still, allowing the lubricant to fully fill the inner cavity of the reservoir 16. At this time, observe through the flow hole 5 whether there is liquid overflowing from the outlet 18 to determine whether the lubricant is saturated. Then, the medical staff hold the retractor sleeve 2 horizontally against the outer wall and insert the smaller diameter end of the retractor sleeve 2 into the patient's nasal cavity. When the retractor sleeve 2 has entered about one-third of the nasal cavity, start pulling the extraction plate 13. The protrusion at the end of the extraction plate 13 squeezes the bottom of the reservoir 16, causing the reservoir 16 to open. The lubricant in reservoir 16 flows out through outlet 18 and flow hole 5. Because outlet 18 has a larger outer diameter and smaller inner diameter (larger outer hole and smaller inner hole), the lubricant does not easily flow out of reservoir 16 under gravity. Instead, it must be squeezed by the protrusion at the end of extraction plate 13 to flow out through outlet 18 and flow hole 5. This causes the lubricant to adhere to the surface of retractor sleeve 2 and the inner wall of the nasal cavity. Retractor sleeve 2 is then slowly inserted in this manner. Since retractor sleeve 2 is made of medical-grade silicone that conforms to the human body and is used in conjunction with lubricant, it reduces damage to the patient's nasal cavity from the outer wall of retractor sleeve 2. Furthermore, the sleeve can be slightly rotated left and right during insertion, which helps to ensure proper lubrication. The lubricant is applied more evenly inside the patient's nasal cavity. Furthermore, by making slight adjustments left and right, the retractor sleeve 2 can be more easily inserted into the patient's nasal cavity. It is worth noting that the outlet 18 and the flow hole 5 have relatively small diameters, resulting in less lubricant flowing out of the flow hole 5. This prevents excessive lubricant leakage from affecting the patient's normal nasal breathing. When the large-diameter end of the retractor sleeve 2 is located at the outermost edge of the patient's nasal cavity, it indicates that the retractor sleeve 2 has reached the designated position. At this point, medical personnel can hold the giraffe forceps 1 and insert it into the inner cavity of the inner sleeve 12 along the middle position. The specific procedure is as follows: first, pass through guide groove 10 and guide groove 2 11, and observe whether the size of the giraffe forceps 1 is suitable for entering the inner cavity of the inner sleeve 12. There will be gaps. If gaps exist, it means that the inner diameter of the inner sleeve 12 is larger than the diameter of the giraffe forceps 1. This improves the maneuverability of the giraffe forceps 1 during insertion and enhances its overall flexibility. Furthermore, the space between the outer sleeve 9 and the inner sleeve 12 is hollow. When the end of the giraffe forceps 1 directly abuts against the inner wall of the inner sleeve 12, the hollow space between the outer sleeve 9 and the inner sleeve 12 acts as a buffer, reducing the force of the outer sleeve 9 contacting the inner sleeve 12. This reduces the force transmitted to the inner wall of the retracting sleeve 2, thereby lessening the impact of the retracting sleeve 2's outer wall on the patient's nasal cavity wall. When the giraffe forceps 1 is located in guide groove 10 and guide groove 11, this can also be tested beforehand.Surgical operations are performed on any part of guide groove 10 and guide groove 11 to observe the working status of giraffe forceps 1, thereby ensuring that giraffe forceps 1 can operate normally and avoiding mechanical failure of medical instruments during surgery. Finally, giraffe forceps 1 is passed through the inner wall of inner sleeve 12 and, in conjunction with the endoscope, is moved to the designated position to begin the surgical operation. Since giraffe forceps 1 passes through the inner cavity of inner sleeve 12, if a slight rotation or small-angle deviation of giraffe forceps 1 is required during the operation, the overall limitation of inner sleeve 12 can prevent giraffe forceps 1 from deviating due to unstable hand grip during deviation. A larger offset angle can alleviate instability of the giraffe forceps 1 during operation, improving the precision and efficiency of the surgery. During the operation, the inner wall of the retraction sleeve 2 and the outer sleeve 9 are connected by connecting piece 1 3, middle connecting piece 15, and connecting piece 2 6, providing sufficient gaps to ensure the patient's free breathing. If bodily fluids or blood leak out during the operation, they will first enter the inner wall of the retraction sleeve 2, while those adhering to the annular disc 2 8 will also enter the inner wall of the retraction sleeve 2 through the drainage groove. This maximizes the concentration and treatment of bodily fluids or blood, improving the efficiency and progress of postoperative cleaning.

[0057] It is worth mentioning that when the retractor sleeve 2 is inserted into the patient's nasal cavity, the lubricant only begins to flow out when the retractor sleeve 2 has entered one-third of the nasal cavity. This indicates that there is no lubricant in the outer part of the nasal cavity wall, while lubricant will appear in the one-third and inner part of the nasal cavity as the retractor sleeve moves. Thus, during the operation, the friction between the retractor sleeve 2 and the outer part of the nasal cavity wall is greater than the friction between the retractor sleeve 2 and the inner part of the nasal cavity wall. This allows the giraffe forceps 1 to be tilted and squeezed to ensure that the retractor sleeve 2 is firmly fixed in the patient's nasal cavity. In addition, the patient is in a supine position during the operation, and the retractor sleeve 2 is also in a horizontal position in the nasal cavity, which can reduce the possibility of the retractor sleeve 2 falling out of the patient's nasal cavity.

[0058] Before inserting the retractor sleeve 2 into the patient's nasal cavity, the size of the retractor sleeve 2 needs to be adjusted to ensure that it matches the inner size of the patient's nasal cavity. A simple comparison is made between the large-diameter end of the retractor sleeve 2 and the outer side of the patient's nasal cavity. If the large-diameter end of the retractor sleeve 2 is found to be larger than the outer side of the patient's nasal cavity, the arc-shaped plate 19 is removed from the inner wall of the placement groove 20. Then, there are two adjustment methods: one is to directly press a finger on the annular disc 4, using the friction between the finger and the annular disc 4, and then rotate the annular disc 4 clockwise (e.g., ...). Figure 13As shown), observe whether the position of the snap-fit ​​groove 22 corresponds to the position of the adjustment hole 23. After adjustment, place the larger diameter end of the pull-back sleeve 2 on the outside of the patient's nasal cavity and roughly observe whether it fits. If there is no problem, hold the pull-back sleeve 2 while fixing the position of the annular disc 4, insert one end of the arc-shaped plate 19 into the inner wall of the snap-fit ​​groove 22, and the other end into the inner wall of the adjustment hole 23. Another method is to first remove the arc-shaped plate 19 and snap one end of the arc-shaped plate 19 into the snap-fit ​​groove 22, and hold the arc-shaped plate 19 into the inner wall of the adjustment hole 23. On plate 19, rotating the arc plate 19 will cause the annular disk 4 to rotate clockwise. During the rotation of the annular disk 4, the outer sleeve 9, which is fixedly connected to the side of the annular disk 4, will be driven, causing the annular disk 8 at the other end of the outer sleeve 9 to rotate synchronously. A snap-fit ​​plate 7 is fixed on the annular disk 8. The snap-fit ​​plate 7 will also rotate under the rotation of the outer sleeve 9, and will open the adjustment groove on the inner wall of the small-diameter end of the sleeve 2. The snap-fit ​​plate 7 will engage with the adjustment groove. In the initial state, the snap-fit ​​plate 7 is located on the right side (e.g., ...). Figure 6 As shown), during the clockwise rotation of the outer sleeve 9 (as shown), Figure 10 As shown), the snap-fit ​​plate 7 will also rotate from right to left (as shown). Figure 6 As shown), the spacing between the adjusting grooves on the inner wall of the small-diameter end of the pull-out sleeve 2 is much larger than the adjusting hole 23 on the large-diameter end of the pull-out sleeve 2. The main reason is that the rotation angle of the large-diameter end of the pull-out sleeve 2 requires the small-diameter end to rotate several times. In order to better ensure that the snap-fit ​​plate 7 can rotate from the right to the left, a weakening part (such as...) is provided on the right side of the snap-fit ​​plate 7. Figure 6As shown), during the rotation of the snap-fit ​​plate 7, it will tilt to the right due to the force and return to its original shape after snapping into the adjustment groove. Thus, when the snap-fit ​​groove 22 corresponds to the adjustment hole 23, the snap-fit ​​plate 7 also corresponds to the adjustment groove. This increases the traction force of the connecting piece 26 and the connecting piece 13 on the inner wall of the retraction sleeve 2, thereby reducing the overall size of the retraction sleeve 2. Furthermore, by simultaneously snapping and fixing the large and small diameter ends of the retraction sleeve 2, it can better ensure that during the operation, the retraction sleeve 2 will not rebound and cause damage to the patient's nasal cavity due to the snap-fit ​​of the large and small diameter ends falling off. After the operation, the annular disc 14 and the retraction sleeve are removed. With the fixing between 2, the snap-fit ​​plate 7 also resets, and the arc-shaped plate 19 is placed back into the placement groove 20. The arc-shaped plate 19 is snapped onto the inner wall of the placement groove 20 by the snap-fit ​​block 21. In particular, when special situations occur, such as when the internal dimensions of the patient's nasal cavity are all 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, the snap-fit ​​plate 7 of the small diameter end needs to be pressed to prevent the two ends of the retraction sleeve 2 from rotating synchronously. In this way, the large diameter end will become smaller while the small diameter end remains unchanged. Similarly, the above method is also applicable to the operation of the small diameter end. In this way, different retraction methods can be given flexibly for different patient groups.

[0059] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0060] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A retraction device for transnasal craniotomy, comprising giraffe forceps, characterized in that, The outer wall of the giraffe clamp is equipped with an inner sleeve, 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 disc 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 disc 1. A retraction sleeve is fixedly connected to the connecting piece 1 away from the outer wall of the circular disc 1, and an auxiliary retraction component is connected to the retraction sleeve. The auxiliary retraction assembly includes a flow hole formed on the outer wall of the retraction sleeve, a connecting piece two is fixedly connected to the end of the retraction sleeve away from the connecting piece one, a snap-fit ​​plate is installed at the end of the retraction sleeve close to the connecting piece two, and a circular disc two is fixedly connected to the end of the connecting piece two away from the retraction sleeve. A pull-out plate is slidably connected to the inner wall of the pull-out sleeve, and a drainage hole is installed at the end of the pull-out sleeve away from the connecting piece 1. The outer wall of the extraction plate is slidably connected to a liquid storage bladder. The liquid storage bladder has several injection ports at its end near the end of the connecting piece 1, and several outlet ports are provided on the outer wall of the liquid storage bladder. An arc-shaped plate is installed on the outer wall of the first annular disc, and a placement groove is opened on the outer wall of the first annular disc. Several snap-fit ​​blocks are fixed on the inner wall of the placement groove, and a snap-fit ​​groove is opened on the inner wall of the placement groove. Several adjustment holes are opened on the end of the pull-out sleeve near the first connecting piece.

2. The retraction device for transnasal craniotomy according to claim 1, characterized in that, A middle connecting piece is fixedly connected to the middle position of the outer wall of the outer sleeve.

3. The retraction device for transnasal craniotomy according to claim 1, characterized in that, The linear array of flow holes is distributed on the outer wall of the pull-out sleeve, the two connecting pieces are distributed in a circumferential array on the outer wall of the two annular disks, the outer wall of the two annular disks is provided with a number of lightweight holes, and the middle position of the snap-fit ​​plate is provided with a weakening groove.

4. The retraction device for transnasal craniotomy according to claim 2, characterized in that, The extraction plates are symmetrically distributed on both sides of the retracting sleeve, the drainage holes are arranged in a circumferential array at one end of the retracting sleeve near 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 retracting sleeve.

5. The retraction device for transnasal craniotomy according to claim 1, characterized in that, The reservoir is made of rubber, and the pores of the injection port and the outlet port are both larger on the outside and smaller on the inside.

6. The retraction device for transnasal craniotomy according to claim 1, characterized in that, The size of the arc-shaped plate is smaller than the size of the placement groove. The snap-fit ​​blocks are fixedly distributed on the inner wall of the placement groove. The size of the snap-fit ​​groove and the adjustment hole are adapted to the size of both ends of the arc-shaped plate.

7. The retraction device for transnasal craniotomy according to claim 1, characterized in that, The pull-out sleeve has a gradually changing size, the connecting pieces are arranged in a circumferential array on the outer wall of the annular disk, and the outer sleeve is larger than the inner sleeve.

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