Telescopic aspirator

Abstract

The utility model discloses a telescopic aspirator, which relates to the technical field of medical instruments and comprises a handle sleeve, a fastening sleeve and a linear suction tube. A first straight pipe section and a conical surface section are sequentially arranged in the handle sleeve along the axis of the handle sleeve. The inner diameter of one end, close to the first straight pipe section, of the conical surface section is minimum, and the minimum inner diameter of the conical surface section is larger than or equal to the inner diameter of the first straight pipe section; the fastening sleeve is sleeved on the linear suction tube; one end of the linear suction tube is inserted into the handle sleeve, a matching surface is arranged on the outer side of the fastening sleeve, the minimum diameter of the matching surface is larger than the minimum inner diameter of the conical surface section, and at least one wire groove is formed in the matching surface. By means of elastic deformation of the fastening sleeve and friction force among the fastening sleeve, fixed connection among the fastening sleeve, the linear suction tube and the aspirator is completed, and the length of the aspirator can be adjusted by adjusting the position of the fastening sleeve on the linear suction tube before fixed connection, so that adjustment requirements of different operations are met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and more specifically, 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 process of transnasal skull base surgery is performed under endoscopic monitoring. Compared with craniotomy, it has the advantages of clearer surgical process, smaller surgical wound, 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, the transnasal aspirator becomes a very important surgical instrument needed in the operation, which is mainly used to attract bleeding from the wound, attract the flushing fluid, and suck out special tissues (tumors, necrosis or cysts) in the brain 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 narrower, and the operation is more delicate. The existing aspirator is fixed in length and cannot be extended. It is only limited to the use of lesions in specific locations and cannot meet the needs of many operations that need to be adjusted. Therefore, the above-mentioned shortcomings of the existing aspirator are in urgent need of improvement to better meet the needs of transnasal cranial surgery. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the utility model provides a retractable suction device.

[0005] 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 arranged 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 near the first straight tube section is the smallest, 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 arranged 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 matching surface matching the inner wall surface of the conical section is arranged on the outer side of the end of the fastening sleeve near the handle sleeve, the minimum diameter of the matching surface is greater than the minimum inner diameter of the conical section, and at least one wire groove is provided on the matching surface. The wire groove runs through both sides of the fastening sleeve, and the end near the first straight tube section is open. When the end of the wire groove near the first straight tube section is elastically deformed to the narrowest width, the linear suction tube is fixedly connected to the handle sleeve through the fastening sleeve, and the gap between the linear suction tube and the handle sleeve is blocked by the fastening sleeve.

[0006] The utility model is further configured to include a limiting ring, which is located in the first straight pipe section and fixedly connected to the linear suction pipe.

[0007] 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.

[0008] The utility model is further configured as follows: the fastening sleeve includes a fastening section and a handle member in sequence along the axial direction thereof. The matching surface and the wire groove are arranged on the fastening section, and the handle member is always located outside the handle sleeve.

[0009] The utility model is further configured as follows: a blocking section is provided between the fastening section and the handle. In the suction channel, the side of the conical section away from the first straight pipe section is the third straight pipe section. The inner diameter of the third straight pipe section is greater than or equal to the maximum inner diameter of the conical section, and the outer side surface of the blocking section matches the inner side surface of the third straight pipe section.

[0010] The utility model is further configured that the outer side surface of the handle sleeve and the outer side surface of the handle portion are both provided with patterns.

[0011] The utility model is further configured as follows: it also includes a pagoda head, and the pagoda head sleeve is fixed on one end of the handle sleeve away from the fastening sleeve.

[0012] The utility model is further configured as follows: it also includes a suction head, which is fixed to one 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.

[0013] 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.

[0014] The utility model is further configured as follows: the outer side surface of the suction head is a conical surface, and the end of the conical surface away from the handle sleeve is a large diameter section; the inner side surface of the suction head is a cylindrical surface.

[0015] In summary, the present invention has the following beneficial effects compared with the prior art:

[0016] In the utility model, the linear suction tube is inserted into the fastening sleeve, and the fastening sleeve is inserted into the handle sleeve. The fixed connection between the three is completed by means of the elastic deformation of the fastening sleeve and the friction between the three. Before the fixed connection, the position of the fastening sleeve on the linear suction tube is adjusted to adjust the length of the suction device to meet the adjustment requirements of different surgeries. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment;

[0018] Figure 2 is a cross-sectional view of an embodiment;

[0019] Figure 3 A schematic diagram of the handle sleeve;

[0020] Figure 4 Schematic diagram of the fastening sleeve.

[0021] 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 groove; 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

[0022] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] 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, and are only for the convenience of describing the utility model 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 utility model.

[0024] Example

[0025] like Figure 1-4 As shown, a retractable suction device provided by the utility model 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 runs through both ends thereof, and the suction channel includes a first straight tube section 11 and a conical section 12 in sequence along its axis. The inner diameter of the conical section 12 at the end 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. 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, and a mating surface matching the inner wall surface of the conical section 12 is arranged on the outer side of the end of the fastening sleeve 2 close to the handle sleeve 1, and 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 sides of the fastening sleeve 2, and is open at one end close to the first straight tube section 11.

[0026] 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 tube section 11 gradually shrinks. 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. At this time, the gap between the linear suction tube 3 and the handle sleeve 1 is blocked by the fastening sleeve 2.

[0027] Then, the vacuum negative pressure device is connected to the end of the handle sleeve 1 away from the fastening sleeve 2, and the bleeding, exudate, pus, contents of the organs, and flushing fluid from the wound surface are sucked out through the end of the linear suction tube 3 located outside the handle sleeve 1 to maintain a clear surgical field of view. Before the linear suction tube 3 is fixedly connected to the handle sleeve 1 through the fastening sleeve 2, the length of the suction device can be adjusted by changing the position of the fastening sleeve 2 on the linear suction tube 3 to meet the adjustment requirements of different surgeries.

[0028] Specifically, a plurality of 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 evenly applies a clamping force around the axis of the linear suction tube 3. In this embodiment, four wire grooves 211 are provided.

[0029] This embodiment also includes a limit ring 4, which is located in the first straight tube section 11 and fixedly connected to the linear suction tube 3. The setting of the limit ring 4 limits the maximum telescopic length of the absorber, thereby reducing the possibility of the linear suction tube 3 detaching from the fastening sleeve 2 during the extension and contraction of the absorber.

[0030] 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 limit 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.

[0031] 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, and the inner diameter of the second straight pipe section 13 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 suction device.

[0032] In this embodiment, the stop ring 4 is fixed to the end of the linear suction tube 3, which effectively avoids the collision between the linear suction tube 3 and the second straight tube section 13, and protects the linear suction tube 3. The stop ring 4 and the linear suction tube 3 can be fixed by welding, gluing, clamping, detachable fixed connection and other fixing connection methods, and welding is used in this embodiment.

[0033] Specifically, the fastening sleeve 2 includes a fastening section 21 and a handle section 23 in sequence along its axial direction. The mating surface and the wire groove 211 are provided on the fastening section 21, and the handle section 23 is always located outside the handle sleeve 1. When adjusting the length of the aspirator, there is no need to apply force to the fastening sleeve 2 through the linear suction tube 3, but force is directly applied to the fastening sleeve 2 to move the fastening sleeve 2 outside the handle sleeve 1, thereby effectively protecting the linear suction tube 3.

[0034] 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 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 side surface of the blocking section 22 cooperates with the inner side 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 setting 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 colinearity of the axes of the fastening sleeve 2 and the handle sleeve 1, further shortening the time required for the extension and retraction adjustment of the aspirator.

[0035] Specifically, in this embodiment, the outer side surface of the blocking section 22 is threadedly matched with the inner side surface of the third straight pipe section 14, the fastening sleeve 2 is threadedly connected with the handle sleeve 1, and the fastening section 21 and the conical surface section 12 are squeezed by rotating the fastening sleeve 2. In this embodiment, the outer side surface of the blocking section 22 is provided with an external thread, and the inner side surface of the third straight pipe section 14 is provided with an internal thread.

[0036] Specifically, the outer side of the handle sleeve 1 and the outer side of the handle member 23 are provided with patterns to increase the friction between the hand and the handle sleeve 1 and the fastening sleeve 2, and accelerate the adjustment of the relative position of the fastening sleeve 2 and the handle sleeve 1. The pattern can be processed by knurling, surface drawing, surface sandblasting, surface corrosion and other processes. In this embodiment, the pattern is processed by knurling. In this embodiment, the edges of both ends of the handle member 23 are chamfered.

[0037] The present embodiment further comprises a pagoda head 5, which is sleeved and fixed on the end of the handle sleeve 1 away from the fastening sleeve 2, so as to increase the firmness of the connection between the handle sleeve 1 and the vacuum negative pressure device.

[0038] Specifically, the outer cylindrical surface of the handle sleeve 1 is divided into a first section 15, a second section 16 and a third section 17 along the axis of the handle sleeve 1. The diameter of the first section 15 is smaller than that of the second section 16, and the diameter of the second section 16 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 a pattern is provided on the third section 17. In this embodiment, the edges at both ends of the third section 17 are chamfered.

[0039] Specifically, in this embodiment, the first section 15 is expanded at one end away from the second section 16 to increase the outer diameter, 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 expansion process is riveting expansion.

[0040] The present 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 arranged 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 speed, disrupt the fluid direction, increase the momentum loss that the fluid needs to overcome in reverse flow, and effectively reduce the possibility of backflow. The resistance increasing structure 61 in the present 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 the present embodiment.

[0041] 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.

[0042] 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.

[0043] 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. Before the fixed connection, the position of the fastening sleeve 2 on the linear suction tube 3 is adjusted to adjust the length of the suction device to meet the adjustment requirements of different operations.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

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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