Auxiliary positioning system used in colorectal minimally invasive surgery

Abstract

The invention discloses an auxiliary positioning system used in colorectal minimally invasive surgery, and belongs to the technical field of devices for colorectal surgery. Comprising a mounting pipe, the lower end of the mounting pipe is closed, an arc-shaped pipe is arranged in the mounting pipe, one end of the arc-shaped pipe is fixedly connected to the inner wall of the mounting pipe and penetrates through the wall thickness of the mounting pipe, a mounting ring is arranged above the other end of the arc-shaped pipe, a communicating hole is formed in the middle of the mounting ring, and a telescopic air bag is arranged in the middle of the mounting ring; one end of the telescopic air bag is fixed to the lower surface of the communicating hole, the other end of the telescopic air bag is closed and located in the arc-shaped pipe, a closing plug is arranged at the upper end of the mounting pipe, the outer side face of the closing plug is fixed to the inner wall of the mounting pipe, and an air inlet pipe is arranged on the portion, below the closing plug, of the mounting pipe; one end of the air inlet pipe is fixed to the mounting pipe and communicates with the interior of the mounting pipe. The technical scheme is used for accurately quantifying the intestinal resection range and improving the operation effect.

Description

Technical Field

[0001] This invention belongs to the technical field of devices for colorectal surgery, and specifically relates to an auxiliary positioning system for colorectal minimally invasive surgery. Background Technology

[0002] With the widespread application of minimally invasive techniques in colorectal surgery, laparoscopic surgery has become an important means of treating diseases such as colorectal cancer. Minimally invasive surgery is performed through small incisions or natural cavities, offering advantages such as less trauma, faster recovery, and fewer complications. However, in minimally invasive surgery, especially when removing colorectal lesions, it is necessary to determine the extent of resection based on the stage of the lesion (generally, a larger portion is removed, for example, the resection margin is more than 5 cm away from the lesion) to ensure complete removal of the tumor and minimal damage to surrounding tissues.

[0003] Currently, the length of lesion resection in laparoscopic surgery mainly relies on the surgeon's experience and intraoperative judgment. However, in actual surgery, due to factors such as changes in patient position and dynamic changes in tissues during the operation, relying solely on the surgeon's experience to determine the resection length has certain limitations and risks. It can easily lead to over-resection, resulting in poor prognosis, or under-resection, resulting in incomplete removal of lesion tissue.

[0004] Therefore, developing a positioning device capable of quantifying the resection length is of great significance for improving the precision and safety of minimally invasive laparoscopic colorectal surgery. This device can not only reduce the surgeon's reliance on experience but also effectively avoid complications caused by inaccurate resection extent, further enhancing the clinical value of minimally invasive surgery. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an auxiliary positioning system for colorectal minimally invasive surgery, so as to reduce the surgeon's reliance on experience during colorectal surgery and effectively avoid the problem of poor surgical results due to inaccurate resection range.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention discloses an auxiliary positioning system for minimally invasive colorectal surgery, comprising an installation tube, the lower end of which is closed and has an internal arc-shaped tube. One end of the arc-shaped tube is fixedly connected to the inner wall of the installation tube and extends through the wall thickness of the installation tube. An installation ring is located above the other end of the arc-shaped tube, with a connecting hole in the middle. A telescopic airbag is located in the middle of the installation ring, with one end fixed to the lower surface of the connecting hole and the other end closed and located inside the arc-shaped tube. A sealing plug is located at the upper end of the installation tube, with its outer surface fixed to the inner wall of the installation tube. An air inlet pipe is located on the installation tube below the sealing plug, with one end fixed to the installation tube and communicating with its interior. An air supply element is detachably connected to the other end of the air inlet pipe, injecting air into the installation tube. The air enters the telescopic airbag to control its expansion and contraction.

[0008] Furthermore, the mounting ring is slidably connected to the inside of the mounting tube, and several traction ropes are evenly distributed around the circumference of the mounting ring. One end of the traction rope is fixed to the mounting ring, and the other end of the traction rope passes through the sealing plug and is slidably connected to the sealing screen.

[0009] Furthermore, a fixing ring is provided above the mounting ring, the edge of the fixing ring is fixed to the inner wall of the mounting tube, a return spring is provided between the fixing ring and the mounting ring, the two ends of the return spring are respectively fixed to the mounting ring and the fixing ring, and the traction rope passes through the fixing block and is fixedly connected to the fixing block.

[0010] Furthermore, a guide tube is provided between the mounting ring and the fixing ring. One end of the guide tube is fixedly connected to the mounting ring, and the other end of the guide tube passes through the middle of the fixing ring and is slidably connected to the fixing ring. A retaining ring is provided on the end of the guide tube above the fixing ring. The retaining ring is fixed to the outer wall of the guide tube, and the interior of the guide tube is in communication with the interior of the telescopic airbag.

[0011] Furthermore, a screw is provided in the middle of the sealing plug. The screw is hollow and its outer surface is threaded to the sealing plug. A contact ring is provided on one end of the screw inside the mounting tube and the contact ring is fixed to the outer surface of the screw. A rotating block is provided on one end of the screw outside the mounting tube and the rotating block is fixed to the outer surface of the screw.

[0012] Furthermore, the installation tube is also provided with a deflection tube inside. The deflection tube includes an insertion tube body and a deflection end set at the end of the insertion tube body. One end of the deflection tube passes through the screw and the guide tube, so that the deflection end enters the interior of the telescopic airbag to change the degree of curvature of the telescopic airbag.

[0013] Furthermore, the deflection tube is an endoscope insertion tube.

[0014] Furthermore, the diameter of the endoscope insertion tube is smaller than the diameter of the guide tube and the diameter of the telescopic airbag.

[0015] Furthermore, the lower end of the mounting tube is provided with a spherical end, which is fixed to the mounting tube.

[0016] The beneficial effects of this invention are as follows:

[0017] In this technical solution, after the end of the installation tube enters the abdominal cavity, the telescopic balloon for quantifying the length is extended. This means that only a small abdominal incision is needed to send the quantification component into the abdominal cavity. At the same time, the extended telescopic balloon can accurately quantify the length of the intestine to be removed, thereby improving the resection effect and surgical outcome.

[0018] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0020] Figure 1 This is a three-dimensional schematic diagram of the auxiliary positioning system of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the auxiliary positioning system of the present invention;

[0022] Figure 3 This is a three-dimensional internal schematic diagram of the auxiliary positioning system of the present invention;

[0023] Figure 4 This is a partial three-dimensional schematic diagram of the fixed ring in the auxiliary positioning system of the present invention;

[0024] Figure 5 This is a partial cross-sectional view of the arc-shaped tube in the auxiliary positioning system of the present invention.

[0025] The following labels are shown in the attached diagram:

[0026] 1. Mounting tube; 2. Inlet pipe; 3. Arc-shaped tube; 4. Mounting ring; 5. Telescopic airbag; 6. Fixing ring; 7. Guide tube; 8. Return spring; 9. Traction rope; 10. Sealing plug; 11. Traction ring; 12. Deflection tube; 13. Screw; 14. Contact ring; 15. Rotating block; 16. Retaining ring; 17. Spherical end. Detailed Implementation

[0027] like Figures 1-5 As shown, an auxiliary positioning system for colorectal minimally invasive surgery includes an installation tube 1, the lower end of which is closed, and an arc-shaped tube 3 is provided inside. One end of the arc-shaped tube 3 is fixedly connected to the inner wall of the installation tube 1 and penetrates the wall thickness of the installation tube 1. An installation ring 4 is provided above the other end of the arc-shaped tube 3. A connecting hole is provided in the middle of the installation ring 4. A telescopic airbag 5 is provided in the middle of the installation ring 4. One end of the telescopic airbag 5 is fixed to the lower surface of the connecting hole, and the other end of the telescopic airbag 5 is closed and located inside the arc-shaped tube 3. A sealing plug 10 is provided at the upper end of the installation tube 1. The outer side of the sealing plug 10 is fixed to the inner wall of the installation tube 1. An air inlet pipe 2 is provided on the installation tube 1 below the sealing plug 10. One end of the air inlet pipe 2 is fixed to the installation tube 1 and communicates with the interior of the installation tube 1. An air supply element is detachably connected to the other end of the air inlet pipe 2. The air supply element injects air into the installation tube 1, and the air enters the interior of the telescopic airbag 5 to control the telescopic state of the telescopic airbag 5.

[0028] The working principle of this technical solution is as follows:

[0029] Air (preferably carbon dioxide, the same gas used to inflate the abdominal cavity) is supplied into the installation tube 1 through a gas supply element (such as a miniature air pump). The air enters the telescopic airbag 5, and under the action of gas pressure, the telescopic airbag 5 extends outward from the inside of the arc-shaped tube 3. The extended part of the telescopic airbag 5 can then be compared with the colon and rectum to determine the cutting length. After use, simply stop injecting gas or inhale, and the telescopic airbag 5 will retract into the arc-shaped tube 3.

[0030] It is easy to understand that the telescopic balloon 5 is normally located inside the arc-shaped tube 3, which does not interfere with the movement of the installation tube 1 on the abdominal incision. At the same time, the length of the telescopic balloon 5 at its extended limit is preset according to the disease tissue at different stages. Therefore, when using it, you only need to place the end of the installation tube 1 at the disease tissue and then extend the telescopic balloon 5 outward. That is, the telescopic end is the cutting edge. This allows for precise removal of the corresponding length of colorectal tissue according to the disease tissue at different stages. The advantage of this method is that after the end of the installation tube 1 enters the abdominal cavity (pelvic cavity), the telescopic balloon 5 of the quantified length is extended. That is, only a small abdominal incision is needed to send the quantified component into the abdominal cavity. That is, only an incision the size of the diameter of the installation tube 1 is needed, minimizing trauma to the patient. Of course, the incision can be an endoscopic incision, thus avoiding additional abdominal incisions.

[0031] It should also be noted that the shape and material of the telescopic airbag 5 can be referenced from a common toy on the market, the "frog with its tongue sticking out." In this toy, the frog's tongue is normally curled and contracted; when the frog's body is compressed, the tongue extends outward under the action of gas; and when the compression is released, the tongue automatically curls back. Further details will not be elaborated upon here. Simultaneously, during surgery, carbon dioxide or other gases need to be introduced into the abdominal cavity to inflate it, thereby creating a field of vision and space for the operation. Therefore, the telescopic airbag 5 in this application can extend into the abdominal cavity without excessive interference or obstruction. This is a standard operating procedure for those skilled in the art and will not be elaborated upon here.

[0032] For example, the standard for resection in existing technology is:

[0033] For mid-to-high rectal cancer, the resection margin of the intestinal segment on the oral side should be ≥10cm from the tumor, and the resection margin on the anal side should be ≥5cm from the tumor.

[0034] Low rectal cancer: The incision margin on the oral side is the same as that for mid-to-high rectal cancer, and the incision margin on the anal side is ≥2cm away from the tumor;

[0035] Special cases: For T1-2 stage rectal cancer or T2-4 or N0-1 stage low rectal cancer that has undergone neoadjuvant therapy, a distal resection margin of 1 cm from the tumor is acceptable, but it is necessary to ensure that the intraoperative rapid frozen section pathological examination of the resection margin is negative.

[0036] In one feasible embodiment, the mounting ring 4 is slidably connected to the inside of the mounting tube 1. A plurality of traction ropes 9 are evenly distributed around the circumference of the mounting ring 4. One end of the traction rope 9 is fixed to the mounting ring 4, and the other end of the traction rope 9 passes through the sealing plug 10 and is slidably connected to the sealing screen. Preferably, a traction ring 11 is provided on the outer end of the traction rope 9, and the end of the traction rope 9 is fixed to the traction ring 11.

[0037] By pulling the traction ring 11, the traction rope 9 is driven, which in turn causes the installation ring 4 to move inside the installation tube 1. This causes the installation ring 4 to move the telescopic airbag 5 inside the arc-shaped tube 3, thereby changing the length of the telescopic airbag 5 extending outside the end of the arc-shaped tube 3. This allows for adjustment of the length of the telescopic airbag 5 located outside the installation tube 1, which serves as a quantitative scale. The length of the portion of the telescopic airbag 5 outside the installation tube 1 can be adjusted according to different resection lengths, making it suitable for surgeries involving the resection of lesions at any stage.

[0038] In one feasible embodiment, a fixing ring 6 is provided above the mounting ring 4, the edge of the fixing ring 6 is fixed to the inner wall of the mounting tube 1, a return spring 8 is provided between the fixing ring 6 and the mounting ring 4, the two ends of the return spring 8 are respectively fixed to the mounting ring 4 and the fixing ring 6, and the traction rope 9 passes through the fixing block and is fixedly connected to the fixing block.

[0039] The reset spring 8 is designed to keep the mounting ring 4 pressed against the end of the arc-shaped tube 3 under normal conditions. This ensures that the mounting ring 4 is stably positioned in its initial position, preventing it from sliding and colliding inside the mounting tube 1 when it is removed. Simultaneously, after the traction rope 9 overcomes the spring damping and moves the mounting ring 4 to adjust the external length of the telescopic airbag 5, simply releasing the traction rope 9 allows the mounting ring 4 to automatically reset under the action of the reset spring 8. After resetting, the air supply is stopped, preventing the end of the elastic airbag from slipping out of the end of the arc-shaped tube 3. Alternatively, a limiting ball can be preferably provided at one end of the elastic airbag. The arc-shaped tube 3, located inside the mounting tube 1, is tapered, with the diameter of the limiting ball larger than the diameter of the tapered portion, and the larger diameter end facing outwards from the mounting tube 1. This prevents the end of the telescopic airbag 5 from slipping out from the end of the arc-shaped tube 3 that contacts the mounting ring 4.

[0040] In one feasible embodiment, a guide tube 7 is provided between the mounting ring 4 and the fixing ring 6. One end of the guide tube 7 is fixedly connected to the mounting ring 4, and the other end of the guide tube 7 passes through the middle of the fixing ring 6 and is slidably connected to the fixing ring 6. A retaining ring 16 is provided on the end of the guide tube 7 above the fixing ring 6. The retaining ring 16 is fixed to the outer wall of the guide tube 7, and the interior of the guide tube 7 is in communication with the interior of the telescopic airbag 5.

[0041] When the mounting ring 4 moves, it will drive the guide tube 7 to move within the fixed ring 6. The guide tube 7 is designed to improve the stability of the mounting ring 4 moving inside the mounting tube 1. The retaining ring 16 is designed to prevent the end of the guide tube 7 from slipping out of the fixed ring 6.

[0042] In one feasible embodiment, a screw 13 is provided in the middle of the sealing plug 10. The screw 13 is hollow and its outer surface is threaded to the sealing plug 10. A contact ring 14 is provided on one end of the screw 13 inside the mounting tube 1. The contact ring 14 is fixed to the outer surface of the screw 13. A rotating block 15 is provided on one end of the screw 13 outside the mounting tube 1. The rotating block 15 is fixed to the outer surface of the screw 13 and is used to facilitate the rotation of the screw 13.

[0043] By rotating the screw 13, the distance between the end of the screw 13 and the mounting tube 1 is adjusted, that is, the distance between the contact ring 14 and the retaining ring 16 is adjusted, which limits the upward movement of the guide tube 7. When the traction rope 9 moves the mounting ring 4 and the guide tube 7 to adjust the length of the telescopic airbag 5 outside the mounting tube 1, the upwardly moving retaining ring 16 will abut against the contact ring 14 and stop moving. In this way, the length of the telescopic airbag 5 can be quickly and accurately adjusted. Preferably, a length scale line is provided on the outer surface of the screw 13. By observing the length scale line, the length of the telescopic airbag 5 outside the mounting tube 1 can be accurately determined, and the length of the telescopic airbag 5 outside the mounting tube 1 can be quickly and accurately adjusted. For example, when the telescopic airbag 5 is fully extended, its length is 10cm, and the portion outside the mounting tube 1 is 8cm. When the length shown at the contact position between the screw 13 and the sealing plug 10 is 5cm, the distance between the contact ring 14 and the retaining ring 16 at the end of the screw 13 is 3cm. That is, the traction rope 9 can drive the mounting ring 4 to move upward by 3cm, which means that the telescopic airbag 5 moves upward by 3cm inside the mounting tube 1. The method for precisely adjusting the length of the telescopic airbag 5 outside the mounting tube 1 is as described above, and will not be elaborated further here.

[0044] Furthermore, when inserting the deflection tube 12, first pull the traction rope 9 to move the guide tube 7 upward, so that the hollow screw 13 and the end of the guide tube 7 are connected to form a guide channel. Then, insert the end of the deflection tube 12 from the end of the screw 13 to guide the deflection tube 12 into the telescopic airbag 5, improve the alignment effect between the deflection tube 12 and the telescopic airbag 5, and enable the deflection tube 12 to quickly enter the interior of the telescopic airbag 5.

[0045] In one feasible embodiment, the installation tube 1 is further provided with a deflection tube 12, which includes an insertion tube body and a deflection end provided at the end of the insertion tube body. One end of the deflection tube 12 passes through the screw 13 and the guide tube 7, so that the deflection end enters the interior of the telescopic airbag 5 to change the degree of curvature of the telescopic airbag 5.

[0046] Since the lesion may be located in the arc-shaped part of the intestine, it is difficult to accurately measure the length of the arc-shaped portion using a straight telescopic balloon 5. Therefore, by inserting the deflection end of the deflection tube 12 into the part of the telescopic balloon 5 located outside the installation tube 1, the deflection of the deflection end inside the telescopic balloon 5 can cause the telescopic balloon 5 to bend, making the curvature of the bend consistent with or approximately the same as the curvature of the intestine. For example, after bending the 5cm telescopic balloon 5 to match and overlap with the curvature of the intestine (with the end of the installation tube located at the lesion), the cutting edge position 5cm away from the lesion can be quantified, thus enabling the measurement of the lesion. This method allows for more accurate quantification of the resection length of the curved portion of the intestine, improving resection and surgical outcomes. It is easy to understand that the curvature of the telescopic balloon 5 can be controlled by adjusting the position of the deflection end inside the telescopic balloon 5 and adjusting the deflection angle of the deflection end. Furthermore, if there are many curved sections of the intestine, multiple measurements of the telescopic balloon 5 can be taken and then superimposed (i.e., by adjusting the curvature and length of the telescopic balloon 5 according to the curvature of the curved section of the intestine, the length of that curved section can be obtained, and then multiple measurements can be superimposed). In other words, the position of the end of the installation tube 1 can be changed. This will not be elaborated further here.

[0047] In one feasible embodiment, the deflection tube 12 is an endoscopic insertion tube. The method and principle of deflecting the end of the endoscopic insertion tube in any direction are existing technologies and will not be elaborated here. At the same time, endoscopic equipment is used during the operation to observe the lesion tissue and provide a surgical field. Therefore, this technical solution can be used in conjunction with endoscopic equipment to accurately quantify the length of the tortuous intestine to be removed. Moreover, when using this technical solution, an abdominal incision can be made using an endoscope.

[0048] In one feasible embodiment, the diameter of the endoscope insertion tube is smaller than the diameter of the guide tube 7 and the diameter of the telescopic balloon 5, providing a gap to facilitate gas passage. In another feasible embodiment, the lower end of the installation tube 1 is provided with a spherical end 17, which is fixed to the installation tube 1, and the arc-shaped contact surface avoids damage to the abdominal tissues.

[0049] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. An auxiliary positioning system for minimally invasive colorectal surgery, characterized in that: The device includes an installation tube (1), the lower end of which is closed, and an arc-shaped tube (3) is provided inside. One end of the arc-shaped tube (3) is fixedly connected to the inner wall of the installation tube (1) and extends through the wall thickness of the installation tube (1). An installation ring (4) is provided above the other end of the arc-shaped tube (3). A connecting hole is provided in the middle of the installation ring (4). A telescopic airbag (5) is provided in the middle of the installation ring (4). One end of the telescopic airbag (5) is fixed to the lower surface of the connecting hole. The other end of the telescopic airbag (5) is closed and located in the arc-shaped tube (3). Inside, the upper end of the mounting tube (1) is provided with a sealing plug (10), the outer side of the sealing plug (10) is fixed to the inner wall of the mounting tube (1), and the mounting tube (1) below the sealing plug (10) is provided with an air inlet pipe (2). One end of the air inlet pipe (2) is fixed to the mounting tube (1) and communicates with the inside of the mounting tube (1). The other end of the air inlet pipe (2) is detachably connected to an air supply element. The air supply element injects air into the mounting tube (1), and the air enters the interior of the telescopic airbag (5) to control the telescopic state of the telescopic airbag (5).

2. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 1, characterized in that: The mounting ring (4) is slidably connected to the inside of the mounting tube (1). Several traction ropes (9) are evenly distributed around the circumference of the mounting ring (4). One end of the traction rope (9) is fixed to the mounting ring (4), and the other end of the traction rope (9) passes through the sealing plug (10) and is slidably connected to the sealing screen.

3. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 2, characterized in that: A fixing ring (6) is provided above the mounting ring (4). The edge of the fixing ring (6) is fixed to the inner wall of the mounting tube (1). A return spring (8) is provided between the fixing ring (6) and the mounting ring (4). The two ends of the return spring (8) are fixed to the mounting ring (4) and the fixing ring (6) respectively. The traction rope (9) passes through the fixing block and is fixedly connected to the fixing block.

4. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 3, characterized in that: A guide tube (7) is provided between the mounting ring (4) and the fixing ring (6). One end of the guide tube (7) is fixedly connected to the mounting ring (4), and the other end of the guide tube (7) passes through the middle of the fixing ring (6) and is slidably connected to the fixing ring (6). A retaining ring (16) is provided on the end of the guide tube (7) above the fixing ring (6). The retaining ring (16) is fixed to the outer wall of the guide tube (7). The interior of the guide tube (7) is connected to the interior of the telescopic airbag (5).

5. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 4, characterized in that: The sealing plug (10) has a screw (13) in the middle. The screw (13) is hollow and its outer surface is threaded to the sealing plug (10). The screw (13) has a contact ring (14) at one end inside the mounting tube (1) and the contact ring (14) is fixed to the outer surface of the screw (13). The screw (13) has a rotating block (15) at one end outside the mounting tube (1) and the rotating block (15) is fixed to the outer surface of the screw (13).

6. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 5, characterized in that: The installation tube (1) is also provided with a deflection tube (12). The deflection tube (12) includes an insertion tube body and a deflection end set at the end of the insertion tube body. One end of the deflection tube (12) passes through the screw (13) and the guide tube (7) so that the deflection end enters the interior of the telescopic airbag (5) to change the degree of bending of the telescopic airbag (5).

7. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 6, characterized in that: The deflection tube (12) is an endoscope insertion tube.

8. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 7, characterized in that: The diameter of the endoscope insertion tube is smaller than the diameter of the guide tube (7) and the diameter of the telescopic airbag (5).

9. The auxiliary positioning system for colorectal minimally invasive surgery according to claim 1, characterized in that: The lower end of the mounting tube (1) is provided with a spherical end (17), which is fixed on the mounting tube (1).

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