Telescopic aspirator

Abstract

A telescopic aspirator, comprising a handle sleeve (1), a fastening sleeve (2), and a linear suction tube (3). The handle sleeve (1) comprises a first straight tube section (11) and a conical section (12) in sequence along an axis of the handle sleeve. The inner diameter of the end of the conical section (12) close to the first straight tube section (11) is the smallest, and the minimum inner diameter of the conical section (12) is greater than or equal to the inner diameter of the first straight tube section (11). The fastening sleeve (2) is sleeved on the linear suction tube (3). One end of the linear suction tube (3) is inserted into the handle sleeve (1). An outer side of the fastening sleeve (2) is provided with a matching surface, and the minimum diameter of the matching surface is greater than the minimum inner diameter of the conical section (12). At least one wire groove (211) is formed on the matching surface. The telescopic aspirator utilizes the elastic deformation of the fastening sleeve (2) and the friction among the handle sleeve (1), the fastening sleeve (2) and the linear suction tube (3) to achieve a fixed connection among the handle sleeve, the fastening sleeve and the linear suction tube. By adjusting the position of the fastening sleeve (2) on the linear suction tube (3) before fixing the connection, the length of the aspirator can be adjusted to meet the adjustment requirements of different surgeries.

Description

A retractable suction device Technical Field

[0001] The utility model relates to the technical field of medical devices, and more particularly to a retractable suction device. Background Art

[0002] Cranial surgery has always been a high-risk area for surgical operations. With the continuous development of medical technology and medical equipment, it has developed from the initial craniotomy to various skull base surgeries performed through endoscopic observation via the nasal cavity. The entire skull base surgery via the nasal cavity is performed under endoscopic monitoring. Compared with craniotomy, it has the advantages of clearer surgical process, smaller surgical wounds, convenient surgical path and non-traumatic head and face, which minimizes the occurrence of complications and harm to patients. Therefore, transnasal skull base surgery is becoming more and more popular among doctors and patients.

[0003] However, in transnasal cranial surgery, a transnasal aspirator becomes a very important surgical instrument that needs to be used during the operation. It is mainly used to aspirate bleeding from the wound, aspirate irrigating fluid, and aspirate special intracranial tissue (tumors, necrosis or cysts) to remove hematomas and maintain a clear surgical field of view. However, from the perspective of the operation process of transnasal cranial surgery, the surgical position of transnasal skull base surgery is deeper, the space is more narrow, and the operation movements are more delicate. The existing aspirator is fixed in length and cannot be extended. It is only limited to the use of lesions in a specific position and cannot meet the needs of many operations that need adjustment. Therefore, the above-mentioned shortcomings of the existing aspirator are in urgent need of improvement to better meet the needs of transnasal cranial surgery.

[0004] Utility Model Content

[0005] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a retractable suction device.

[0006] The utility model provides the following technical solution: a retractable suction device, which includes a handle sleeve, a fastening sleeve and a linear suction tube. A suction channel is provided inside the handle sleeve and runs through both ends thereof, and the suction channel includes a first straight tube section and a conical section in sequence along its axis. The inner diameter of the conical section is smallest at the end close to the first straight tube section, and the minimum inner diameter of the conical section is greater than or equal to the inner diameter of the first straight tube section. The fastening sleeve is provided on the linear suction tube and can slide on the linear suction tube. One end of the linear suction tube is inserted into the handle sleeve, and a mating surface matching the inner wall surface of the conical section is provided on the outer side of the fastening sleeve close to the end of the handle sleeve, the minimum diameter of the mating surface is greater than the minimum inner diameter of the conical section, and at least one wire groove is provided on the mating surface. The wire groove runs through both sides of the fastening sleeve and opens at the end close to the first straight tube section. When the wire groove is elastically deformed to its narrowest width at the end close to the first straight tube section, the linear suction tube is fixedly connected to the handle sleeve through the fastening sleeve. At this time, the gap between the linear suction tube and the handle sleeve is blocked by the fastening sleeve.

[0007] The utility model is further configured to include a limiting ring, which is located in the first straight tube section and fixedly connected to the linear suction tube.

[0008] The utility model is further configured as follows: in the suction channel, the side of the first straight pipe section away from the conical section is the second straight pipe section, and the inner diameter of the second straight pipe section is smaller than the outer diameter of the limiting ring.

[0009] The utility model is further configured as follows: the fastening sleeve includes a fastening section and a handle member in sequence along its axial direction. The matching surface and the wire groove are provided on the fastening section, and the handle member is always located outside the handle sleeve.

[0010] The present invention further comprises a sealing section disposed between the fastening section and the handle. Within the suction channel, the side of the tapered section facing away from the first straight section forms a third straight section. The inner diameter of the third straight section is greater than or equal to the maximum inner diameter of the tapered section, and the outer surface of the sealing section mates with the inner surface of the third straight section.

[0011] The utility model is further configured as follows: the outer side surface of the handle sleeve and the outer side surface of the handle member are both provided with patterns.

[0012] The utility model is further configured as follows: it also includes a pagoda head, and the pagoda head sleeve is fixed on the end of the handle sleeve away from the fastening sleeve.

[0013] The utility model is further configured as follows: it also includes a suction head, which is fixed to the end of the linear suction tube away from the handle sleeve, and a resistance-increasing structure is arranged inside the suction head, and the resistance-increasing structure is a concave-convex structure or a concave structure or a convex structure.

[0014] The utility model is further configured as follows: a plurality of resistance increasing structures are arranged in the attraction head, and all the resistance increasing structures are arranged along the axis of the attraction head.

[0015] The utility model is further configured as follows: the outer side surface of the suction head is a conical surface, the end of the conical surface away from the handle sleeve is a large diameter section; and the inner side surface of the suction head is a cylindrical surface.

[0016] In summary, the present invention has the following beneficial effects compared to the prior art:

[0017] In the utility model, the linear suction tube is inserted into the fastening sleeve, and the fastening sleeve is inserted into the handle sleeve. With the help of the elastic deformation of the fastening sleeve and the friction between the three, the fixed connection between the three is completed. By adjusting the position of the fastening sleeve on the linear suction tube before the fixed connection, the length of the suction device can be adjusted to meet the adjustment requirements of different operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of an embodiment;

[0019] FIG2 is a cross-sectional view of an embodiment;

[0020] Figure 3 is a schematic diagram of the handle sleeve;

[0021] FIG4 is a schematic diagram of a fastening sleeve.

[0022] In the figure: 1. Handle sleeve; 11. First straight pipe section; 12. Conical section; 13. Second straight pipe section; 14. Third straight pipe section; 15. First section; 16. Second section; 17. Third section; 2. Fastening sleeve; 21. Fastening section; 211. Wire trough; 22. Sealing section; 23. Handle means; 3. Linear suction tube; 4. Limiting ring; 5. Pagoda head; 6. Suction head; 61. Resistance increasing structure. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Example

[0026] As shown in Figures 1-4, a retractable suction device provided by the present invention comprises a handle sleeve 1, a fastening sleeve 2, and a linear suction tube 3. A suction channel is provided inside the handle sleeve 1, running through both ends thereof. The suction channel comprises a first straight tube section 11 and a conical section 12 along its axis. The inner diameter of the conical section 12 is smallest at the end closest to the first straight tube section 11. The minimum inner diameter of the conical section 12 is greater than or equal to the inner diameter of the first straight tube section 11. In this embodiment, the minimum inner diameter of the conical section 12 is greater than the inner diameter of the first straight tube section 11. The fastening sleeve 2 is sleeved on the linear suction tube 3 and can slide on the linear suction tube 3. One end of the linear suction tube 3 is inserted into the handle sleeve 1. A mating surface is provided on the outer side of the end of the fastening sleeve 2 closest to the handle sleeve 1, matching the inner wall of the conical section 12. The minimum diameter of the mating surface is greater than the minimum inner diameter of the conical section 12, and at least one wire groove 211 is provided on the mating surface. The wire groove 211 runs through both the inner and outer sides of the fastening sleeve 2 and opens at the end closest to the first straight tube section 11.

[0027] As the contact area between the mating surface and the conical section 12 increases, the fastening sleeve 2 is squeezed by the conical section 12 and elastically deformed, and the end of the fastening sleeve 2 close to the first straight pipe section 11 gradually shrinks. When the end of the wire groove 211 close to the first straight pipe section 11 is elastically deformed to the narrowest width, the linear suction tube 3 is fixedly connected to the handle sleeve 1 through the fastening sleeve 2. At this time, the gap between the linear suction tube 3 and the handle sleeve 1 is blocked by the fastening sleeve 2.

[0028] The vacuum device is then connected to the end of the handle sleeve 1 facing away from the fastening sleeve 2. The end of the linear suction tube 3, located outside the handle sleeve 1, aspirates blood, exudate, pus, organ contents, and irrigation fluid from the wound, maintaining a clear surgical field of view. Before the linear suction tube 3 is securely connected to the handle sleeve 1 via the fastening sleeve 2, the position of the fastening sleeve 2 on the linear suction tube 3 can be adjusted to meet the needs of different surgeries.

[0029] Specifically, a plurality of the wire grooves 211 are provided, and all the wire grooves 211 are evenly distributed around the axis of the fastening sleeve 2 to ensure that the fastening sleeve 2 uniformly applies clamping force around the axis of the linear suction tube 3. In this embodiment, four wire grooves 211 are provided.

[0030] This embodiment also includes a limiting ring 4, which is located in the first straight tube section 11 and is fixedly connected to the linear suction tube 3. The setting of the limiting ring 4 limits the maximum telescopic length of the absorber, reducing the possibility of the linear suction tube 3 detaching from the fastening sleeve 2 during the telescopic process of the absorber.

[0031] Specifically, the outer diameter of the limiting ring 4 is equal to the inner diameter of the first straight tube section 11. The cooperation between the limiting ring 4 and the first straight tube section 11 can help the fastening sleeve 2 to define the axial position of the linear suction tube 3, so as to more quickly complete the fixation of the handle sleeve 1, the fastening sleeve 2 and the linear suction tube 3.

[0032] Specifically, in the suction channel, the side of the first straight pipe section 11 away from the conical section 12 is the second straight pipe section 13, whose inner diameter is smaller than the outer diameter of the limiting ring 4. The cooperation between the second straight pipe section 13 and the limiting ring 4 defines the minimum telescopic length of the aspirator.

[0033] In this embodiment, the retaining ring 4 is fixed to the end of the linear suction tube 3, effectively preventing the linear suction tube 3 from colliding with the second straight tube section 13 and protecting the linear suction tube 3. The retaining ring 4 and the linear suction tube 3 can be fixed using various fixing methods, such as welding, gluing, clamping, and detachable fixing. In this embodiment, welding is used.

[0034] Specifically, the fastening sleeve 2 comprises a fastening section 21 and a handle section 23, arranged along its axis. The mating surface and wire groove 211 are defined on the fastening section 21, while the handle section 23 remains located outside the handle sleeve 1. When adjusting the aspirator length, force is applied directly to the fastening sleeve 2, eliminating the need to apply force through the linear suction tube 3. This forces the fastening sleeve 2 outward from the handle sleeve 1, effectively protecting the linear suction tube 3.

[0035] Specifically, a blocking section 22 is further provided between the fastening section 21 and the handle section 23. In the suction channel, the side of the conical section 12 facing away from the first straight tube section 11 is the third straight tube section 14. The inner diameter of the third straight tube section 14 is greater than or equal to the maximum inner diameter of the conical section 12, and the outer surface of the blocking section 22 cooperates with the inner surface of the third straight tube section 14; in this embodiment, the inner diameter of the third straight tube section 14 is greater than the maximum inner diameter of the conical section 12. The provision of the blocking section 22 can, firstly, ensure that a negative pressure environment is formed inside the handle sleeve 1 to absorb wound bleeding, exudate, pus, contents in organs, and flushing fluid, etc., and secondly, it can limit the axis of the fastening sleeve 2 and the handle sleeve 1 to be collinear, further shortening the time required for telescopic adjustment of the aspirator.

[0036] Specifically, in this embodiment, the outer surface of the blocking section 22 is threadedly engaged with the inner surface of the third straight pipe section 14, and the fastening sleeve 2 is threadedly connected to the handle sleeve 1. By rotating the fastening sleeve 2, the fastening section 21 and the tapered section 12 are squeezed. In this embodiment, the outer surface of the blocking section 22 is provided with an external thread, and the inner surface of the third straight pipe section 14 is provided with an internal thread.

[0037] Specifically, the outer surfaces of the handle sleeve 1 and the grip portion 23 are both patterned to increase friction between the hand, the handle sleeve 1, and the fastening sleeve 2, accelerating adjustment of the relative position of the fastening sleeve 2 and the handle sleeve 1. The pattern can be produced using processes such as knurling, surface brushing, surface sandblasting, and surface etching. In this embodiment, the pattern is produced using knurling. In this embodiment, the edges of the grip portion 23 are chamfered at both ends.

[0038] This embodiment further includes a pagoda head 5, which is sleeved and fixed on the end of the handle sleeve 1 away from the fastening sleeve 2 to increase the firmness of the connection between the handle sleeve 1 and the vacuum negative pressure device.

[0039] Specifically, the outer cylindrical surface of the stem sleeve 1 is divided into a first section 15, a second section 16, and a third section 17 along the axis of the stem sleeve 1. The diameter of the first section 15 is smaller than that of the second section 16, which in turn is smaller than that of the third section 17. The first section 15 is inserted into the pagoda head 5, the second section 16 limits the pagoda head 5, and the third section 17 is provided with a pattern. In this embodiment, the edges of the third section 17 at both ends are chamfered.

[0040] Specifically, in this embodiment, the outer diameter of the first section 15 at one end away from the second section 16 is increased by a tube expansion process, so that the outer diameter of the expanded portion is larger than the inner diameter of the pagoda head 5, thereby preventing the pagoda head 5 from separating from the handle sleeve 1. In this embodiment, the tube expansion process is riveting expansion.

[0041] This embodiment also includes a suction head 6, which is fixed to the end of the linear suction tube 3 away from the handle sleeve 1, and a resistance-increasing structure 61 is provided inside the suction head 6, and the resistance-increasing structure 61 is a concave-convex structure or a concave structure or a convex structure. The resistance-increasing structure 61 can change the original planar shape of the inner side of the suction head 6, introduce additional shape resistance, reduce the fluid velocity, disrupt the fluid direction, increase the momentum loss that the fluid needs to overcome in the reverse flow, and effectively reduce the possibility of backflow. The resistance-increasing structure 61 in this embodiment is a concave structure, and the concave structure is annular. The suction head 6 and the linear suction tube 3 can be fixed by various fixed connection methods such as welding, gluing, clamping, detachable fixed connection, etc., and welding is used in this embodiment.

[0042] Specifically, a plurality of resistance increasing structures 61 are provided in the suction head 6, and all resistance increasing structures 61 are arranged along the axis of the suction head 6 to further reduce the possibility of liquid backflow in the suction head. In this embodiment, two resistance increasing structures 61 are provided.

[0043] Specifically, the inner side surface of the suction head 6 is a cylindrical surface; the outer side surface of the suction head 6 is a conical surface, and the end of the conical surface away from the handle sleeve 1 is a large diameter section, which increases the wall thickness of the fluid inlet end of the suction head 6, improves the strength and pressure resistance of the fluid inlet end of the suction head 6, and extends the life of the suction head 6.

[0044] To sum up, in this embodiment, the linear suction tube 3 is inserted into the fastening sleeve 2, and the fastening sleeve 2 is inserted into the handle sleeve 1. With the help of the elastic deformation of the fastening sleeve 2 and the friction between the three, the fixed connection between the three is completed. By adjusting the position of the fastening sleeve 2 on the linear suction tube 3 before the fixed connection, the length of the suction device can be adjusted to meet the adjustment requirements of different operations.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A retractable suction device, characterized in that: The invention comprises a handle sleeve (1), a fastening sleeve (2) and a linear suction tube (3); a suction channel is arranged inside the handle sleeve (1) and passes through both ends thereof, and the suction channel comprises a first straight tube section (11) and a conical section (12) in sequence along its axis; the conical section (12) has the smallest inner diameter at one end close to the first straight tube section (11), and the smallest inner diameter of the conical section (12) is greater than or equal to the inner diameter of the first straight tube section (11); the fastening sleeve (2) is sleeved on the linear suction tube (3) and can slide on the linear suction tube (3); one end of the linear suction tube (3) is inserted into the handle sleeve (1), and the fastening sleeve (2) is close to the handle sleeve (1). A matching surface matching the inner wall surface of the conical section (12) is arranged on the outer side of one end of the fastening sleeve (2), the minimum diameter of the matching surface is greater than the minimum inner diameter of the conical section (12), and at least one wire groove (211) is provided on the matching surface; the wire groove (211) penetrates both inner and outer sides of the fastening sleeve (2), and is open at one end close to the first straight tube section (11); when the end of the wire groove (211) close to the first straight tube section (11) is elastically deformed to the narrowest width, the linear suction tube (3) is fixedly connected to the handle sleeve (1) through the fastening sleeve (2), and at this time, the gap between the linear suction tube (3) and the handle sleeve (1) is blocked by the fastening sleeve (2).

2. A retractable suction device according to claim 1, characterized in that: It also includes a limiting ring (4), which is located in the first straight pipe section (11) and is fixedly connected to the linear suction pipe (3).

3. A retractable suction device according to claim 2, characterized in that: In the suction channel, the side of the first straight pipe section (11) away from the conical section (12) is a second straight pipe section (13), and the inner diameter of the second straight pipe section (13) is smaller than the outer diameter of the limiting ring (4).

4. A retractable suction device according to any one of claims 1 to 3, characterized in that: The fastening sleeve (2) comprises a fastening section (21) and a handle section (23) in sequence along its axial direction; the matching surface and the wire groove (211) are arranged on the fastening section (21), and the handle section (23) is always located outside the handle sleeve (1).

5. A retractable suction device according to claim 4, characterized in that: A blocking section (22) is also provided between the fastening section (21) and the handle section (23); in the suction channel, the side of the conical section (12) away from the first straight pipe section (11) is the third straight pipe section (14); the inner diameter of the third straight pipe section (14) is greater than or equal to the maximum inner diameter of the conical section (12), and the outer side surface of the blocking section (22) cooperates with the inner side surface of the third straight pipe section (14).

6. A retractable suction device according to claim 4, characterized in that: The outer side surface of the handle sleeve (1) and the outer side surface of the handle portion (23) are both provided with patterns.

7. A retractable suction device according to any one of claims 1 to 3, characterized in that: It also comprises a pagoda head (5), wherein the pagoda head (5) is sleeved and fixed on an end of the handle sleeve (1) facing away from the fastening sleeve (2).

8. A retractable suction device according to any one of claims 1 to 3, characterized in that: It also comprises a suction head (6), which is fixed to one end of the linear suction tube (3) away from the handle sleeve (1), and has a resistance increasing structure (61) arranged inside the suction head (6), wherein the resistance increasing structure (61) is a concave-convex structure or a concave structure or a convex structure.

9. A retractable suction device according to claim 8, characterized in that: A plurality of resistance increasing structures (61) are arranged in the attraction head (6), and all the resistance increasing structures (61) are arranged along the axis of the attraction head (6).

10. A retractable suction device according to claim 9, characterized in that: The outer side surface of the suction head (6) is a conical surface, and the end of the conical surface facing away from the handle sleeve (1) is a large diameter section; the inner side surface of the suction head (6) is a cylindrical surface.

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