Working catheter

Abstract

The utility model provides a working catheter which comprises an operating part and a main body part, the main body part comprises a first end, a second end and a working channel located between the first end and the second end, the operating part is arranged at the first end, the operating part is configured to adjust the working position of the main body part in the working process, and the operating part is provided with a mounting position for assembling an auxiliary instrument. The second end has a flap-like tip. According to the utility model, the working catheter which is convenient to operate and has protection and separation functions can be provided.

Description

Technical Field

[0001] The utility model generally relates to the field of biomedical engineering industry, and specifically relates to a working catheter. Background Art

[0002] UBE technology, namely unilateral double-channel spinal endoscopic surgery, is generally applicable to the treatment of degenerative diseases of the cervical, thoracic and lumbar spine, such as lumbar disc herniation and spinal stenosis. In UBE technology, an observation channel and an operation channel are usually established. In the operation channel, a radiofrequency blade is usually used with the help of a dilatation catheter and a dissector to cut the yellow and blue soft tissue to create a working space for the passage of working instruments; in the observation channel, an arthroscope is usually used to observe the working space and a lighting source is used to illuminate the working space, so as to facilitate the operation.

[0003] In the prior art, a dilatation catheter is usually used to dilate step by step, and then the muscle and fascia tissues are stripped with a stripper, and then a semi-tubular retractor is inserted as a working channel. However, in the actual application of the semi-tubular channel, there are often a lot of soft tissues such as muscle, fat, fascia, etc. floating in the flushing fluid, blocking the surgical field of view, and it takes time and effort to use a radiofrequency blade to clean them, which will increase soft tissue trauma and affect surgical efficiency; the semi-tubular working channel is blocked by soft tissue and the water flow is not smooth, and intraoperative bleeding can easily affect the clarity of the surgical field of view; when performing fusion surgery under the microscope, the semi-tubular working channel is difficult to protect the dura mater and nerve roots, which can easily cause damage to the dura mater and nerve roots; when performing intervertebral bone grafting, due to lack of protection, bone graft particles are easy to fall into the spinal canal; poor lighting of the surgical field of view or excessive bleeding during surgery can easily make the surgical field of view unclear, and at this time, additional auxiliary instruments may be needed to deal with unexpected situations and make it inconvenient to perform surgical operations. Summary of the invention

[0004] The utility model is proposed in view of the above-mentioned prior art conditions, and its purpose is to provide a working catheter which is easy to operate and has protection and separation functions.

[0005] To this end, the utility model provides a working catheter, including an operating part and a main body, the main body including a first end, a second end, and a working channel located between the first end and the second end, the operating part is arranged at the first end, the operating part is configured to adjust the working position of the main body during operation, the operating part has an installation position for assembling auxiliary equipment, and the second end has a tongue-shaped tip portion.

[0006] In the utility model, by arranging an operating part on the working catheter and by arranging a mounting position on the operating part, auxiliary instruments can be assembled at the mounting position of the operating part to fix the auxiliary instruments, thereby facilitating the operator to introduce the auxiliary instruments when operating the surgical instruments and the working catheter; in addition, by arranging the operating part on the main body of the working catheter, it is convenient for the operator to adjust the position of the main body of the working catheter, and by arranging a tongue-shaped tip part with the function of protecting and separating soft tissue at the second end, the operator can achieve effective protection and separation of soft tissue by operating the main body of the working catheter without replacing the surgical instruments used for protection and separation, which can reduce the replacement frequency of surgical instruments and improve surgical efficiency.

[0007] In addition, in the working catheter involved in the present invention, optionally, the working channel provides a channel for surgical instruments to enter the target tissue, thereby facilitating the surgical instruments to enter the target tissue through the working catheter.

[0008] In addition, in the working catheter involved in the utility model, optionally, the operating part has a bottom surface and a side surface, and the area of ​​the side surface is larger than the area of ​​the bottom surface. In this case, since the operator usually touches the side surface of the operating part when moving and rotating the working catheter, by making the area of ​​the side surface larger than the area of ​​the bottom surface, the operating part can be more in line with the operator's habits, increasing the area of ​​the operating part in contact with the human hand, thereby facilitating the operator to operate the working catheter.

[0009] In addition, in the working catheter of the present invention, the operating part may optionally have a groove formed on the side surface. In this case, since the operator usually touches the side surface of the operating part when moving and rotating the working catheter, the groove is provided on the side surface, so that the operating part can better fit the shape of the operator's hand, thereby facilitating the operator to operate the working catheter.

[0010] In addition, in the working catheter of the present invention, optionally, the length of the working channel is 80 mm to 100 mm, thereby facilitating the working catheter to enter deeper target tissues.

[0011] In addition, in the working catheter involved in the utility model, optionally, the diameter of the working channel is not less than 12 mm. In this case, since the radial dimensions of most surgical instruments are usually not more than 10 mm, and the width of the fusion device used for intervertebral bone grafting and fusion is usually not more than 10 mm, by making the diameter of the working channel not less than 12 mm, it is possible to facilitate most surgical instruments to enter the working channel, thereby improving the scope of application of the working catheter.

[0012] In addition, in the working catheter of the utility model, optionally, the thickness of the tongue-shaped tip portion is less than the thickness of the portion of the main body except the tongue-shaped tip portion. In this case, when the soft tissue of the target object is separated by the tongue-shaped tip portion, the tongue-shaped tip portion can be easily separated from the soft tissue of the target object, and at the same time, the portion of the main body except the tongue-shaped tip portion can have a certain rigidity to meet the working requirements.

[0013] In addition, in the working catheter involved in the utility model, optionally, the second end has an oblique opening, and the tongue-shaped tip portion is formed on the oblique opening. In this case, the working space of the surgical instrument can be increased; in addition, by forming the tongue-shaped tip portion on the oblique opening, when the surgical instrument works at the oblique opening, it is convenient for the operator to protect the soft tissue through the tongue-shaped tip portion.

[0014] In addition, in the working catheter involved in the utility model, optionally, the auxiliary device is a thin optical fiber for illumination or a thin drainage tube, and when the auxiliary device is assembled in the installation position, the auxiliary device is at least partially located in the working channel. In this case, when the auxiliary device is a thin optical fiber for illumination or a thin drainage tube, the clarity of the surgical field can be improved by providing auxiliary lighting to the working space or promoting the discharge of the flushing liquid; in addition, when the auxiliary device is assembled in the installation position, the auxiliary device is at least partially located in the working channel, which can facilitate the auxiliary device to assist the operator in performing the surgical operation, thereby improving the surgical efficiency.

[0015] In addition, in the working catheter involved in the utility model, optionally, the main body is a tubular structure. In this case, by making the working channel completely closed in the circumferential direction, the floating soft tissue of the target object entering the surgical field can be reduced, thereby reducing the time used to clean the floating soft tissue of the target object and improving the surgical efficiency; in addition, compared with the semi-tubular catheter, it can reduce the damage to the soft tissue of the target object when the surgical instrument enters and exits.

[0016] According to the utility model, a working catheter which is easy to operate and has protection and separation functions can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will now be explained in further detail by way of example only with reference to the accompanying drawings.

[0018] Figure 1 2 is a diagram showing an application scenario of the working catheter involved in the example of the utility model.

[0019] Figure 2 It is a schematic diagram showing the structure of the working catheter involved in the example of the utility model.

[0020] Figure 3It is a schematic diagram showing the structure of the working catheter involved in the example of the present utility model from another viewing direction.

[0021] Figure 4 It shows Figure 3 A cross-sectional view of the working conduit along line XX is shown.

[0022] Figure 5A 1 is a schematic structural diagram showing a first embodiment of the oblique opening of the working conduit according to an example of the present invention.

[0023] Figure 5B 1 is a schematic structural diagram showing a second embodiment of the oblique opening of the working conduit according to the example of the present invention.

[0024] Figure 6 It is a partial schematic diagram showing the second end of the working conduit involved in the example of the utility model.

[0025] Figure 7 It is a schematic diagram showing the structure of the auxiliary device involved in the example of the utility model.

[0026] Figure 8 It shows Figure 2 The working catheter is shown in a section along line AA after installation of auxiliary instruments.

[0027] Description of reference numerals:

[0028] 1…observation channel, 2…operation channel, 3…endoscope, 31…illumination light, 4…target object, 41…target tissue, 5…surgical instrument, 6…working catheter, 61…operating part, 611…mounting position, 612…side surface, 613…bottom surface, 614…groove, 62…main body, 621…first end, 622…second end, 6221…tongue-shaped tip, 623…working channel, 624…oblique mouth, 6241…rear end, 6242…front end, 6243…recessed part, 7…auxiliary instrument, 71…mounting block, 72…head, 73…body. DETAILED DESCRIPTION

[0029] Hereinafter, with reference to the accompanying drawings, the preferred embodiments of the present invention will be described in detail. In the following description, the same symbols are assigned to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the dimensions of the components or the shapes of the components may be different from the actual ones.

[0030] It should be noted that the terms "including" and "having" and any variations thereof in the present invention, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] It should be noted that, in this article, relative position and relative direction terms such as "above", "towards above", "below", "towards downward", "up and down direction", "left side", "towards the left side", "left side", "towards the left", "right side", "towards the right side", "right side", "towards the right", "left and right direction", "front", "towards the front", "back", "towards the back", "front and back direction" are used with reference to the normal operating posture and should not be considered restrictive.

[0032] The working catheter involved in the utility model is capable of assembling auxiliary instruments at the mounting position of the operating portion by arranging an operating portion on the working catheter and arranging a mounting position on the operating portion, thereby making it convenient for an operator to operate the working catheter and the surgical instrument at the same time; in addition, by arranging the operating portion on the main body of the working catheter, it is convenient for the operator to adjust the position of the main body of the working catheter, and by arranging a tongue-shaped tip portion at the second end, the operator can achieve effective protection and separation of soft tissue by operating the main body of the working catheter without replacing the surgical instrument used for protection and separation, thereby reducing the replacement frequency of the surgical instrument and improving the surgical efficiency.

[0033] In some examples, the working catheter involved in the present invention may also be referred to as a catheter, and sometimes may also be called an operating catheter, a working cannula, a UBE working catheter, or a dual-channel spinal endoscope working catheter, etc.

[0034] The target object involved in the utility model may refer to a human body or an animal body. The soft tissue involved in the utility model may refer to tissue in the body of the target object (such as muscle, fat, fascia, dura mater, nerve root, etc.). The target tissue involved in the utility model may refer to a tissue or diseased part of the target object that needs surgery (such as the neck, chest, lumbar spine, etc.). In addition, the operator involved in the utility model may be a person who operates a working catheter.

[0035] The working space involved in the present utility model may refer to the operating space when the surgical instrument performs a surgical operation on the target tissue.

[0036] Hereinafter, the working catheter involved in the present invention will be described in conjunction with the accompanying drawings, taking the application scenario of unilateral double-channel spinal endoscopic surgery as an example.

[0037] Figure 11 is a diagram showing an application scenario of the working catheter 6 involved in the example of the present utility model.

[0038] For some examples, see Figure 1 The surgical channel of unilateral double-channel spinal endoscopic surgery can include an observation channel 1 and an operation channel 2.

[0039] In some examples, the observation channel 1 and the operation channel 2 can be formed by dilating the incision of the target object 4 through a dilation catheter and by stripping the muscle, fascia and other tissues of the target object 4 through a stripper.

[0040] In some examples, the observation channel 1 can be used to allow the endoscope 3 to pass through and enter the target object 4. In some examples, the endoscope 3 can be an arthroscope or a percutaneous foraminal endoscope. In some examples, the endoscope 3 can emit an illumination light 31 to illuminate the workspace. Thus, it is easy to observe the workspace.

[0041] In some examples, the operation channel 2 can be used to allow the surgical instrument 5 and the working catheter 6 to pass through and enter the target object 4. In some examples, the working catheter 6 can be inserted first, and then the surgical instrument 5 can be inserted into the working catheter 6. In other words, the surgical instrument 5 can be located in the working catheter 6. In some examples, the surgical instrument 5 can be a grinding drill, a vertebral plate clamp, a nucleus pulposus clamp, or a nerve retractor.

[0042] In some examples, the operator can inject a flushing liquid into the working space through the observation channel 1. In some examples, the flushing liquid can be used to flush floating muscle tissue and fascia tissue, etc. Thus, the clarity of the surgical field can be improved. In some examples, the flushing liquid can be saline.

[0043] Figure 2 Schematic diagram showing the structure of the working conduit 6 involved in the example of the utility model.

[0044] For some examples, see Figure 2 The working conduit 6 may include an operating unit 61. In some examples, the operating unit 61 may be used to operate the working conduit 6. Thus, it is convenient for the operator to adjust the working position of the working conduit 6. In some examples, the working position may be the position of the working conduit 6 when it is working.

[0045] In some examples, there may be multiple operating parts 61, for example, two, so that it is convenient for the operator to rotate the working catheter 6. In some examples, the operating parts 61 may be symmetrically distributed.

[0046] In some examples, the operation portion 61 may be one. In this case, after the working catheter 6 enters the target tissue 41, since the relative positions of the operation portion 61 and the oblique opening 624 (described later) are fixed, it is convenient for the operator to distinguish the direction of the opening of the oblique opening 624.

[0047] For some examples, see Figure 2 , the operating portion 61 may have a mounting position 611. In some examples, the mounting position 611 may be a slot or a hole. In some examples, the mounting position 611 may be equipped with an auxiliary instrument 7 (described later). In this case, when the operator operates the working conduit 6 and the surgical instrument 5 at the same time, it is difficult for the operator to operate the auxiliary instrument 7 because the operator's hands need to operate the working conduit 6 and the surgical instrument 5 respectively. The auxiliary instrument 7 can be assembled to the mounting position 611 of the operating portion 61 to fix the auxiliary instrument 7, so that the operator can easily introduce the auxiliary instrument 7 when operating the surgical instrument 5 and the working conduit 6, thereby improving the efficiency of the operation.

[0048] In some examples, there may be a plurality of mounting positions 611 , for example, two. In some examples, the number of mounting positions 611 may be the same as the number of operating portions 61 .

[0049] In some examples, the operation portion 61 and the main body 62 (described later) may be integrally formed, thereby increasing the strength of the working conduit 6 and reducing the possibility of deformation of the working conduit 6 or breakage between the operation portion 61 and the main body 62 .

[0050] In some examples, the operating part 61 can be detachably mounted on the main body 62. In this case, by replacing a different operating part 61, the applicable range of the working catheter 6 can be improved. For example, the operating part 61 with a fixed structure can be replaced to fix the working catheter 6 to the skin surface of the target object 4.

[0051] In some examples, the working conduit 6 may be made of a stainless steel material.

[0052] Figure 3 It is a schematic diagram showing the structure of the working conduit 6 involved in the example of the present utility model from another viewing direction.

[0053] For some examples, see Figure 3 The operating portion 61 may have a side surface 612. In some examples, the side surface 612 may be a surface of the operating portion 61 that is perpendicular to the circumference of the working conduit 6 and parallel to the axial direction of the working conduit 6.

[0054] In some examples, the operating portion 61 may further have a bottom surface 613. In some examples, the bottom surface 613 may be a surface of the operating portion 61 that is perpendicular to the axial direction of the working conduit 6 and parallel to the circumferential direction of the working conduit 6.

[0055] In some examples, the area of ​​the side surface 612 may be larger than the area of ​​the bottom surface 613. In this case, since the operator usually contacts the side surface 612 of the operating portion 61 when moving and rotating the working conduit 6, by making the area of ​​the side surface 612 larger than the area of ​​the bottom surface 613, the operating portion 61 can better fit the operator's habits, increase the area of ​​the operating portion 61 in contact with the human hand, and thus facilitate the operator to operate the working conduit 6.

[0056] For some examples, see Figure 3 , the operating portion 61 may have a groove 614. In some examples, the groove 614 may be formed on the side 612 of the operating portion 61. In this case, since the operator usually contacts the side 612 of the operating portion 61 when moving and rotating the working conduit 6, by making the area of ​​the side 612 larger than the area of ​​the bottom 613, the operating portion 61 can be more in line with the operator's habits, increasing the area of ​​the operating portion 6161 in contact with the human hand, thereby facilitating the operator to operate the working conduit 6.

[0057] In some examples, the groove 614 may extend from one side of the side 612 to the other side of the side 612 along the axial direction of the working conduit 6. In this case, by increasing the area of ​​the groove 614, it is convenient for the operator to operate the working conduit 6 through the operating part 61.

[0058] In some examples, the groove 614 may be a circular groove, so that the groove 614 can fit the shape of the operator's hand, making it easier for the operator to operate the working conduit 6 .

[0059] In some examples, the groove 614 may also be a polygonal groove.

[0060] In some examples, when the operator needs to fix the working catheter 6, the operating portion 61 of the working catheter 6 can be fixed by using a fixing device or a clamping device outside the body of the target object 4. This can facilitate the operator to perform surgical operations.

[0061] For some examples, see Figure 3 The working conduit 6 may include a main body 62. In some examples, the main body 62 may include a first end 621 and a second end 622. In some examples, the first end 621 and the second end 622 may have openings. Thus, the surgical instrument 5 can be easily inserted and removed.

[0062] In some examples, the operating portion 61 may be configured to adjust the working position of the main body 62 during operation. In other words, the operator may adjust the working position of the main body 62 through the operating portion 61 .

[0063] In some examples, the first end 621 may be an end of the main body 62 close to the operator. In some examples, the operating part 61 may be disposed at the first end 621. In some examples, the operation process may refer to the entire process of the operation. Thus, it is convenient for the operator to adjust the working position of the working catheter 6.

[0064] In some examples, the second end 622 may be an end of the main body 62 that is away from the operator.

[0065] Figure 4 It shows Figure 3 A cross-sectional view of the working conduit 6 along the line XX is shown.

[0066] For some examples, see Figure 4 The main body 62 may further include a working channel 623 .

[0067] In some examples, the working channel 623 can provide a channel for the surgical instrument 5 to enter the target tissue 41 , thereby facilitating the surgical instrument 5 to enter the target tissue 41 through the working catheter 6 .

[0068] In some examples, the working channel 623 may be located between the first end 621 and the second end 622. In some examples, the working channel 623 may be used to allow the surgical instrument 5 to pass through. Thus, the damage of the surgical instrument 5 to the target object 4 can be reduced.

[0069] In some examples, the length of the working channel 623 can be 80 mm to 100 mm. For example, 80 mm, 90 mm, and 100 mm. In this case, since the working channel 623 in the prior art is usually 30 mm to 50 mm, such as 30 mm, 40 mm or 50 mm, it is not suitable for target tissues 41 (such as spinal canals and intervertebral discs) at deeper locations. When the surgical instrument 5 works in the deeper target tissue 41, the working channel 623 in the prior art may not be able to fully cover the surgical instrument 5. By making the length of the working channel 623 80 mm to 100 mm, it is possible to facilitate the working conduit 6 to fully cover the surgical instrument 5, thereby reducing the damage of the surgical instrument 5 to the soft tissue of the target object 4. In addition, it is possible to facilitate the convergence of the working conduit 6 with the water inlet in the observation channel 1, thereby limiting the diffusion of the flushing liquid to the soft tissue of the target object 4, facilitating the flushing liquid to be discharged from the target object 4, and improving the surgical efficiency.

[0070] In some examples, the diameter of the working channel 623 may be not less than 12 mm, such as 12 mm, 13 mm, and 14 mm. In this case, since the radial dimensions of most existing surgical instruments 5 are usually not greater than 10 mm, and the width of the fusion cage used for intervertebral bone grafting and fusion is usually not greater than 10 mm, by making the diameter of the working channel 623 not less than 12 mm, it is possible to facilitate most surgical instruments 5 to enter the working channel 623, thereby improving the applicable scope of the working catheter 6.

[0071] In some examples, the working conduit 6 can be used to implant an implant, such as bone graft particles or a fusion device. In this case, since the implant is usually delivered to the target tissue 41 by clamping the implant with forceps or by a bone graft funnel in the prior art, the possibility of the implant falling into an area outside the target tissue 41 during delivery can be reduced by making the length of the working channel 623 80 mm to 100 mm. In addition, the replacement frequency of the surgical instrument 5 can be reduced, thereby improving the efficiency of the operation.

[0072] For some examples, see Figure 4 , the cross section of the working channel 623 may be circular. That is, the working channel 623 may be a circular channel. In this case, since most of the existing surgical instruments 5 are tubular structures, it is convenient for the surgical instruments 5 to pass through. In addition, by making the cross section of the working channel 623 circular, the working conduit 6 can be more evenly stressed, reducing the possibility of the working conduit 6 being deformed by stress.

[0073] For some examples, see Figure 3 and Figure 4 , the main body 62 may be a tubular structure. That is, the main body 62 may be a long strip structure having a tubular shape. In other words, the main body 62 may have a structure that is closed in the circumferential direction. In this case, by making the working channel 623 completely closed in the circumferential direction, the floating soft tissue of the target object 4 in the surgical field of view can be reduced, thereby reducing the time used to clean the floating soft tissue of the target object 4 and improving the surgical efficiency. In addition, by making the flushing liquid flow out of the working catheter 6, the flushing liquid can be limited from diffusing into the soft tissue of the target object 4, thereby facilitating the flushing liquid to be discharged from the target object 4 and improving the surgical efficiency. In addition, compared with the semi-tubular catheter, the damage to the soft tissue of the target object 4 caused by the surgical instrument 5 when entering and exiting the operating channel 2 can be reduced. In addition, the spontaneous closure of the soft tissue of the target object 4 can be limited, which is conducive to avoiding the collapse of the operating channel 2 and the situation where the flushing liquid is blocked by the soft tissue and is difficult to be discharged.

[0074] In some examples, the surface of the main body 62 may be a smooth surface. In this case, when the operator adjusts the position of the working catheter 6, the friction between the working catheter 6 and the soft tissue of the target object 4 can be reduced, thereby reducing the damage of the working catheter 6 to the target object 4.

[0075] Figure 5A 1 is a schematic structural diagram showing a first embodiment of the oblique opening 624 of the working conduit 6 according to an example of the present invention. Figure 5B 1 is a schematic structural diagram showing a second embodiment of the oblique opening 624 of the working conduit 6 according to the example of the present invention.

[0076] In some examples, the second end 622 may have an oblique opening 624. In this case, by increasing the opening area of ​​the second end 622, the working space of the surgical instrument 5 can be increased, which facilitates the operation of the surgical instrument 5. In addition, by operating the operating part 61 to rotate the working guide tube 6 and change the direction of the opening of the oblique opening 624, the position of the working space of the surgical instrument 5 can be adjusted.

[0077] In some examples, the oblique opening 624 may include a rear end 6241 close to the first end 621 and a front end 6242 away from the first end 621. In this case, since the front end 6242 extends a portion along the length direction of the working catheter 6 compared to the rear end 6241, the soft tissue of the target object 4 is blocked from entering the working space by the extended portion, which can reduce the damage of the surgical instrument 5 to the target object 4.

[0078] For some examples, see Figure 5A , the bevel 624 may have a recessed portion 6243. In some examples, the recessed portion 6243 may be located between the rear end 6241 and the front end 6242. In this case, the contact area between the front end 6242 and the soft tissue of the target object 4 can be reduced, that is, the front end 6242 is sharper, thereby facilitating the operator to position the working catheter 6 and separate the soft tissue of the target object 4.

[0079] For some examples, see Figure 5B , the oblique opening 624 may not have the recessed portion 6243. Thus, the contact area between the front end 6242 and the target tissue 41 can be increased, that is, the oblique opening 624 is blunter, thereby reducing the damage of the oblique opening 624 to the target object 4.

[0080] Figure 6 It is a partial schematic diagram showing the second end 622 of the working conduit 6 involved in the example of the present utility model.

[0081] For some examples, see Figure 6 The second end 622 may have a tongue-shaped tip portion 6221. Thus, it is convenient for the working catheter 6 to block and bluntly separate the soft tissue of the target object 4.

[0082] In some examples, the tongue-shaped tip portion 6221 can be used to protect and separate the soft tissue of the target object 4. For example, when the working catheter 6 penetrates deep into the spinal canal, the soft tissue covering the target tissue 41 is peeled off by rotating the working catheter 6. In this case, since the operator can achieve the protection and separation of the soft tissue of the target object 4 by operating the main body 62 of the working catheter 6 without replacing the surgical instrument 5 for protection and separation, the replacement frequency of the surgical instrument 5 can be reduced, thereby reducing the damage to the target object 4 and improving the surgical efficiency.

[0083] For some examples, see Figure 6 , the thickness of the tongue-shaped tip portion 6221 may be less than the thickness of the portion of the main body 62 other than the tongue-shaped tip portion 6221. In this case, when the soft tissue of the target object 4 is separated by the tongue-shaped tip portion 6221, the tongue-shaped tip portion 6221 can be used to separate the soft tissue of the target object 4, and at the same time, the portion of the main body 62 other than the tongue-shaped tip portion 6221 can have a certain rigidity to meet the working requirements.

[0084] For some examples, see Figure 6 , the tongue-flap-shaped tip portion 6221 may be formed on the oblique opening 624. In some examples, the tongue-flap-shaped tip portion 6221 may be formed on the front end 6242 of the oblique opening 624. In this case, by forming the tongue-flap-shaped tip portion 6221 on the oblique opening 624, when the surgical instrument 5 works at the oblique opening 624, it is possible to facilitate the operator to protect the soft tissue of the target object 4 through the tongue-flap-shaped tip portion 6221. In addition, by forming the tongue-flap-shaped tip portion 6221 on the front end 6242 of the oblique opening 624, the area of ​​the contact portion between the tongue-flap-shaped tip portion 6221 and the soft tissue of the target object 4 can be reduced, that is, the tongue-flap-shaped tip portion 6221 is sharper, thereby facilitating the operator to position the working catheter 6 and separate the soft tissue of the target object 4.

[0085] Figure 7 Schematic diagram showing the structure of the auxiliary device 7 involved in the example of the present utility model.

[0086] In some examples, the auxiliary device 7 may be a device with auxiliary functions. In some examples, the auxiliary device 7 may be a thin optical fiber for illumination or a thin drainage tube. In this case, by assembling the auxiliary device 7 with different functions at the mounting position 611 of the operating portion 61, the applicable range of the working catheter 6 can be improved.

[0087] In some examples, when the auxiliary instrument 7 is assembled in the installation position 611, the auxiliary instrument 7 may be at least partially located in the working channel 623. Thus, the auxiliary instrument 7 can assist the operator in performing the surgical operation, thereby improving the surgical efficiency.

[0088] For some examples, see Figure 7 The auxiliary device 7 may include a mounting block 71. The mounting block 71 may cooperate with the mounting position 611 of the operating portion 61 to assemble the auxiliary device 7 to the working catheter 6.

[0089] As described above, the mounting position 611 can be used to assemble the auxiliary instrument 7. In this case, by installing the mounting block 71 into the mounting position 611, the auxiliary instrument 7 can be assembled to the working catheter 6.

[0090] For some examples, see Figure 7 The auxiliary device 7 may further include a head 72 and a body 73. In some examples, the mounting block 71 may be disposed on the head 72. In some examples, the mounting block 71 and the head 72 may be integrally formed.

[0091] In some examples, the body 73 may be made of a flexible material, thereby facilitating adjustment of the position of the auxiliary device 7 .

[0092] Figure 8 It shows Figure 2 The working catheter 6 is shown in a section along the line AA after the auxiliary instrument 7 has been installed.

[0093] For some examples, see Figure 8 , the size of the mounting block 71 can be slightly larger than the size of the mounting position 611. In this case, by forming an interference fit between the mounting block 71 and the mounting position 611, the auxiliary device 7 and the working conduit 6 can be assembled more tightly, thereby facilitating the operator to operate the working conduit 6 and the auxiliary device 7 at the same time.

[0094] In some examples, the head 72 can be at least partially located within the working channel 623 of the working catheter 6.

[0095] As mentioned above, see Figure 8 , the auxiliary instrument 7 can be at least partially located in the working channel 623 of the working catheter 6. Figure 8 , the body 73 can be at least partially located in the working channel 623 of the working catheter 6. In this case, when the auxiliary instrument 7 is assembled at the installation position 611, the auxiliary instrument 7 is at least partially located in the working channel 623, which can facilitate the auxiliary instrument 7 to assist the operator in performing the surgical operation, thereby improving the surgical efficiency. In addition, the damage of the auxiliary instrument 7 to the target object 4 can be reduced.

[0096] In some examples, the length of the auxiliary instrument 7 may be equal to or slightly greater than the length of the working channel 623. In some examples, the end of the body 73 may extend out of the working channel 623 from the oblique opening 624. In this case, taking the auxiliary instrument 7 as an illumination thin optical fiber as an example, when the oblique opening 624 blocks the illumination light 31 of the endoscope 3 while blocking the soft tissue, the auxiliary instrument 7 can be used to assist in illuminating the working space, thereby improving the clarity of the surgical field of view.

[0097] In some examples, when the auxiliary instrument 7 is a drainage tube, the auxiliary instrument 7 can promote the discharge of the flushing liquid, thereby improving the clarity of the surgical field of view.

[0098] In the utility model, by setting an operating part 61 on the working catheter 6 and by setting a mounting position 611 on the operating part 61, the auxiliary instrument 7 can be assembled on the mounting position 611 of the operating part 61 to fix the auxiliary instrument 7, so that it is convenient for the operator to introduce the auxiliary instrument 7 when operating the surgical instrument 5 and the working catheter 6, thereby improving the operation efficiency; in addition, by setting the operating part 61 on the main body 62 of the working catheter 6, it is convenient for the operator to adjust the position of the main body 62 of the working catheter 6, and by setting a tongue-shaped tip part 6221 at the second end 622, the operator can achieve protection and separation of soft tissue by operating the main body 62 of the working catheter 6 without replacing the surgical instrument 5 used for protection and separation, which can reduce the replacement frequency of the surgical instrument 5, thereby improving the operation efficiency; in addition, by setting the length of the working channel 623 to 80 mm to 100 mm, it is convenient for the working catheter 6 to cover the surgical instrument 5, thereby reducing the damage of the surgical instrument 5 to the target object 4.

[0099] Although the utility model is specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the utility model in any form. Those skilled in the art can modify and change the utility model as needed without departing from the essential spirit and scope of the utility model, and these modifications and changes all fall within the scope of the utility model.

Claims

1. A working catheter, characterized in that: It includes an operating part and a main body, the main body includes a first end, a second end, and a working channel located between the first end and the second end, the operating part is arranged at the first end, the operating part is configured to adjust the working position of the main body during operation, the operating part has an installation position for assembling auxiliary equipment, and the second end has a tongue-shaped tip portion.

2. The working catheter according to claim 1, characterized in that: The working channel provides a channel for surgical instruments to enter the target tissue.

3. The working catheter according to claim 1, characterized in that: The operating portion has a bottom surface and a side surface, and an area of ​​the side surface is larger than an area of ​​the bottom surface.

4. The working catheter according to claim 3, characterized in that: The operating portion has a groove formed on the side surface.

5. The working catheter according to claim 1, characterized in that: The length of the working channel is 80 mm to 100 mm.

6. The working catheter according to claim 1, characterized in that: The diameter of the working channel is not less than 12 mm.

7. The working catheter according to claim 1, characterized in that: The thickness of the tongue-shaped tip portion is smaller than the thickness of a portion of the main body portion other than the tongue-shaped tip portion.

8. The working catheter according to claim 1, characterized in that: The second end has an oblique opening, and the tongue-shaped tip portion is formed on the oblique opening.

9. The working catheter according to claim 1, characterized in that: The auxiliary device is a thin optical fiber for illumination or a thin drainage tube. When the auxiliary device is assembled at the installation position, the auxiliary device is at least partially located in the working channel.

10. The working catheter according to claim 1, characterized in that: The main body is a tubular structure.

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