Device for mechanical decompression drug delivery and minimally invasive surgery in the colorectal anus

Abstract

This invention relates to the field of anorectal surgical medical equipment technology, specifically to a device for mechanical decompression-type drug delivery and minimally invasive surgical procedures in the colorectal and anal region. The device includes an insertion tube, a rotating tube disposed inside the insertion tube, a drive unit for rotating the rotating tube, a rotating unit disposed inside the insertion tube, and a piston unit that moves as the rotating tube rotates. In this device for mechanical decompression-type drug delivery and minimally invasive surgical procedures in the colorectal and anal region, the rotating tube causes changes in the internal structure of the piston unit during rotation. Through the piston plate, suction is generated at the suction port, which reduces intestinal peristalsis and movement in the surgical area, thereby improving surgical stability and reducing errors and risks during the procedure.

Description

Technical Field

[0001] The present invention relates to the technical field of anorectal surgical medical equipment, and in particular to a device for mechanical decompression drug delivery and minimally invasive surgery in the anus and colorectum. Background Art

[0002] Colorectal anal drug delivery is a treatment method that delivers drugs directly to the lesion site. It is often used to treat rectal diseases. Minimally invasive rectal surgery, such as transanal minimally invasive surgery, uses a single-port laparoscopic operating platform and utilizes the body's natural anus for surgery. It has the advantages of less trauma and faster recovery.

[0003] The patent with application number CN202321928133.6 discloses a drug delivery structure for colorectal and anal surgery, including a shell, a fixed block and a sealing ring, wherein the fixed block is arranged inside the shell, and the outer wall of the fixed block is connected to the sealing ring; it also includes: a docking piece, which is arranged on the right side surface of the fixed block, a push rod is arranged on the right side of the docking piece, a plug is fixed on the left side surface of the fixed block, and the plug is in a cone shape; a through hole, which is opened at the left end of the shell. The drug delivery structure for colorectal and anal surgery wipes and disinfects the anus with the disinfectant cotton on the wiping block, and after disinfection, the wiping block is torn off, and the left end of the shell is inserted into the patient's body to deliver the medicine, which improves the flexibility of the drug delivery mechanism when used.

[0004] When applying medicine with existing equipment, if the amount of medicine is not properly controlled and the direct contact between the medicine and the intestine cannot be effectively controlled, the medicine will directly stimulate the intestinal mucosa and generate additional pressure, causing discomfort to the patient. In addition, the peristalsis and movement of the intestine during surgery will significantly reduce the accuracy of the surgery, because the movement of the intestine will change the position of the surgical target. This instability will also increase the difficulty of the surgery, prolong the operation time, and increase the risk of surgical errors and complications.

[0005] In view of this, we propose a device for mechanical decompression drug delivery and minimally invasive surgical operations in the colorectal anus. Summary of the invention

[0006] The purpose of the present invention is to provide a device for mechanical decompression drug delivery and minimally invasive surgery in the colorectal anus to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A device for mechanical decompression drug delivery and minimally invasive surgery in the colorectal anus, comprising an insertion tube, a rotating tube disposed inside the insertion tube, a driving part for driving the rotating tube to rotate, a rotating part disposed inside the insertion tube, and a piston part that moves as the rotating tube rotates;

[0009] The insertion tube comprises a fixed tube body, an inner sleeve body arranged inside the fixed tube body, and a limiting ring body arranged on the inner tube wall of the inner sleeve body, and an observation groove penetrating from inside to outside is opened on the tube wall of the fixed tube body;

[0010] The rotating tube comprises a rotating tube body and a fixed ring gear arranged on the bottom surface of the rotating tube body;

[0011] The driving part includes a first knob, a transmission rod rotating with the first knob, a rotating rod rotating with the transmission rod, and a rod end gear arranged at the top end of the rotating rod;

[0012] The rotating part includes a second knob, a wire wheel rotating with the second knob, a liquid blocking plate moving with the rotation of the wire wheel, and a pressure spring that pushes the liquid blocking plate to move toward the observation slot by its own elastic force;

[0013] The piston part comprises a limit slider which is displaced as the rotating tube rotates as a whole and a piston plate which moves together with the limit slider.

[0014] In the technical solution of the present invention, a limiting slide groove for providing a moving range for the internal structure of the piston part is opened on the inner tube wall of the fixed tube body, a pulling groove is opened on the inner tube wall of the fixed tube body above the limiting slide groove, a ventilation groove connected to the pulling groove is opened inside the fixed tube body, an air suction hole connected to the ventilation groove is opened at a peripheral position of the observation groove on the outer tube wall of the fixed tube body, and a tube top slide groove and a rotating groove connected to the tube top slide groove are opened on the top tube wall of the fixed tube body.

[0015] In the technical solution of the present invention, the inner sleeve body is welded and fixed to the fixed tube body, the top surface horizontal height of the inner sleeve body is the same as the top surface horizontal height of the limiting ring body, a plurality of through holes for introducing surgical instruments and drugs are opened inside the inner sleeve body, and the limiting ring body is integrally formed with the fixed tube body.

[0016] In the technical solution of the present invention, the rotating tube body is rotatably connected to the inside of the fixed tube body, a docking groove matching the size of the observation groove is opened on the outer wall of the rotating tube body, a tube wall convex groove is opened on the outer tube wall of the rotating tube body, and the fixed ring teeth are welded and fixed to the bottom surface of the bottom ring plate of the rotating tube body.

[0017] In the technical solution of the present invention, the first knob is fixedly engaged with the transmission rod, the transmission rod is rotatably connected to the tube wall of the fixed tube body, and a worm is sleeved on the outer side wall of the transmission rod near the center position.

[0018] In the technical solution of the present invention, the rotating rod is rotatably connected to the bottom tube wall of the fixed tube body, the rod end gear is welded and fixed to the end position of the rotating rod, the rod end gear is meshed with the fixed ring teeth, and a worm wheel meshed with the worm is clamped at the bottom end of the rotating rod.

[0019] In the technical solution of the present invention, an extension tube is welded to the top end of the second knob, and the extension tube is rotatably connected to the inside of the inner sleeve body. A protective lens is clamped on the tube wall at the inner top end of the extension tube, and the wire wheel is clamped and fixed on the tube wall of the extension tube near the top end, and the wire wheel is rotatably connected to the inside of the rotating groove.

[0020] In the technical solution of the present invention, the liquid-blocking plate is slidably connected to the inside of the tube top slide, a connecting rope is connected between the liquid-blocking plate and the wire wheel, one end of the connecting rope is wound around the outside of the wire wheel, one end of the pressure spring is welded to the groove wall of the groove on the inner side of the liquid-blocking plate, and the other end is welded to the groove wall of the tube top slide.

[0021] In the technical solution of the present invention, the limit slider is slidably connected to the inside of the limit slide groove, a block protrusion is welded on the outer wall of the limit slider, and the end of the block protrusion extends to the inside of the tube wall protrusion groove.

[0022] In the technical solution of the present invention, the piston plate is slidably connected to the inside of the pull-out groove, and a number of regularly distributed connecting rods are clamped between the piston plate and the limit slider. One end of the connecting rod is clamped to the top surface of the limit slider, and the other end is clamped to the bottom surface of the piston plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The device for mechanical decompression drug delivery and minimally invasive surgery for the colorectal anus, through the observation slot of the fixed tube body and the rotatable rotating tube, allows medical staff to directly observe polyps or drug application areas inside the fixed tube body through the through hole on the inner sleeve body, thereby improving the intuitiveness and accuracy of the operation, and when the drainage tube is used to apply the drug, the drug will contact the inner wall of the fixed tube body, thereby reducing direct stimulation of the drug and the intestine, thereby reducing intestinal pressure and alleviating the patient's discomfort.

[0025] 2. In the device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus, the rotating tube will drive the internal structure of the piston part to change during rotation, and suction will be generated at the position of the suction hole through the piston plate, which can reduce the peristalsis and movement of the intestine in the surgical area, thereby improving the stability of the operation and reducing errors and risks during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0028] Figure 3 It is a schematic cross-sectional view of some structures in the present invention.

[0029] Figure 4 This is one of the schematic cross-sectional views of the structure of the insertion tube in the present invention.

[0030] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of part A.

[0031] Figure 6 This is the second schematic cross-sectional view of the structure of the insertion tube in the present invention.

[0032] Figure 7 It is a schematic diagram of the structure of the rotating tube in the present invention.

[0033] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged portion B.

[0034] Fig. 9 It is a schematic diagram of the structure of the driving part in the present invention.

[0035] Fig.10 It is a schematic cross-sectional view of the structure of the rotating part in the present invention.

[0036] Fig.11 It is a structural schematic diagram of the piston part in the present invention.

[0037] Description of reference numerals:

[0038] 100, insertion tube; 110, fixed tube body; 111, observation slot; 112, limit slide slot; 113, pull-out slot; 114, ventilation slot; 115, air suction hole; 116, tube top slide slot; 117, rotation slot; 120, inner sleeve body; 130, limit ring body;

[0039] 200, rotating tube; 210, rotating tube body; 211, docking groove; 212, tube wall convex groove; 220, fixed ring gear;

[0040] 300, driving part; 310, first knob; 320, transmission rod; 330, rotating rod; 340, rod end gear; 350, worm; 360, worm wheel;

[0041] 400, rotating part; 410, second knob; 420, extension tube; 430, wire wheel; 440, liquid blocking plate; 450, protective lens; 460, connecting rope; 470, pressure spring;

[0042] 500, piston part; 510, limit slider; 520, block protrusion; 530, connecting rod; 540, piston plate. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] See also Figure 1-Figure 11 As shown, this embodiment provides a technical solution:

[0045] The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus comprises an insertion tube 100, a rotating tube 200 disposed inside the insertion tube 100, a driving part 300 for driving the rotating tube 200 to rotate, a rotating part 400 disposed inside the insertion tube 100, and a piston part 500 that moves as the rotating tube 200 rotates;

[0046] In this embodiment, Figure 4-Figure 6 As shown, the insertion tube 100 includes a fixed tube body 110, an inner sleeve body 120 disposed inside the fixed tube body 110, and a limiting ring body 130 disposed on the inner tube wall of the inner sleeve body 120. The tube wall of the fixed tube body 110 is provided with an observation groove 111 that penetrates inside and outside;

[0047] Specifically, a limiting groove 112 for providing a moving range for the internal structure of the piston part 500 is opened on the inner wall of the fixed tube body 110, a pulling groove 113 is opened on the inner wall of the fixed tube body 110 above the limiting groove 112, a ventilation groove 114 connected to the pulling groove 113 is opened inside the fixed tube body 110, an air suction hole 115 connected to the ventilation groove 114 is opened at a peripheral position of the observation groove 111 on the outer wall of the fixed tube body 110, and a top groove 116 and a rotating groove 117 connected to the top groove 116 are opened on the top wall of the fixed tube body 110.

[0048] Furthermore, the inner sleeve body 120 is welded and fixed to the fixed tube body 110, the top surface horizontal height of the inner sleeve body 120 is the same as the top surface horizontal height of the limiting ring body 130, a plurality of through holes for introducing surgical instruments and drugs are opened inside the inner sleeve body 120, and the limiting ring body 130 and the fixed tube body 110 are integrally formed.

[0049] Furthermore, the space between the fixed tube body 110 and the inner sleeve body 120 is used to provide space for storing drugs and performing minimally invasive surgery. The observation groove 111 is used to expose the drug application area and the surgical area to the inside of the fixed tube body 110. The limiting slide groove 112 and the pull-out groove 113 are used to provide a sliding range for the structure in the piston part 500. After the piston part 500 moves as a whole, it is used to generate negative pressure in the ventilation groove 114, and adsorb the intestinal wall on the outer hole wall of the suction hole 115. The tube top slide groove 116 and the rotating groove 117 are used to provide a placement range for the piston part 500. The limiting ring body 130 is used to limit the rotation range of the rotating tube 200.

[0050] In this embodiment, Figure 7-Figure 8 As shown, the rotating tube 200 includes a rotating tube body 210 and a fixed ring gear 220 disposed on the bottom surface of the rotating tube body 210;

[0051] Specifically, the rotating tube body 210 is rotatably connected to the inside of the fixed tube body 110, a docking groove 211 matching the size of the observation groove 111 is opened on the outer wall of the rotating tube body 210, a tube wall convex groove 212 is opened on the outer tube wall of the rotating tube body 210, and the fixed ring gear 220 is welded and fixed to the bottom surface of the bottom ring plate of the rotating tube body 210.

[0052] Furthermore, the rotating tube body 210 is used to prevent the intestines at the end of the rectum from interfering with the observation groove 111 and hindering the insertion of the fixed tube body 110 when the fixed tube body 110 is inserted into the patient's anus. When the tube wall convex groove 212 rotates, it is used to change the overall position of the piston part 500. The fixed ring teeth 220 are used to cooperate with the driving part 300 to drive the rotating tube 200 to rotate as a whole.

[0053] In this embodiment, Fig. 9 As shown, the driving part 300 includes a first knob 310, a transmission rod 320 that rotates with the first knob 310, a rotating rod 330 that rotates with the transmission rod 320, and a rod end gear 340 disposed at the top end of the rotating rod 330;

[0054] Specifically, the first knob 310 is fixedly engaged with the transmission rod 320 , and the transmission rod 320 is rotatably connected to the tube wall of the fixed tube body 110 . A worm 350 is sleeved on the outer wall of the transmission rod 320 near the center.

[0055] Furthermore, the rotating rod 330 is rotatably connected to the bottom tube wall of the fixed tube body 110, the rod end gear 340 is welded and fixed to the end position of the rotating rod 330, the rod end gear 340 is meshed with the fixed ring gear 220, and the worm wheel 360 meshing with the worm 350 is clamped at the bottom end position of the rotating rod 330.

[0056] Furthermore, the first knob 310 in the twisting driving unit 300 drives the transmission rod 320 to rotate, and drives the worm 350 to rotate. After the worm 350 contacts the worm wheel 360, it drives the worm wheel 360 and the rotating rod 330 to rotate, and then the rod end gear 340 at the end of the rotating rod 330 cooperates with the fixed ring gear 220 in the rotating tube 200, driving the rotating tube 200 to rotate, so that the docking groove 211 moves to the position of the observation groove 111.

[0057] In this embodiment, Fig.10 As shown, the rotating part 400 includes a second knob 410, a wire wheel 430 that rotates with the second knob 410, a liquid blocking plate 440 that moves with the rotation of the wire wheel 430, and a pressure spring 470 that pushes the liquid blocking plate 440 to move toward the observation slot 111 through its own elastic force;

[0058] Specifically, an extension tube 420 is welded to the top of the second knob 410, and the extension tube 420 is rotatably connected to the inside of the inner sleeve body 120. A protective lens 450 is clamped on the tube wall at the inner top of the extension tube 420. The wire wheel 430 is clamped and fixed on the tube wall near the top of the extension tube 420, and the wire wheel 430 is rotatably connected to the inside of the rotating groove 117.

[0059] Furthermore, the liquid-blocking plate 440 is slidably connected to the inside of the tube top slide 116, a connecting rope 460 is connected between the liquid-blocking plate 440 and the wire wheel 430, one end of the connecting rope 460 is wound around the outside of the wire wheel 430, one end of the pressure spring 470 is welded to the groove wall of the groove on the inner side of the liquid-blocking plate 440, and the other end is welded to the groove wall of the tube top slide 116.

[0060] Furthermore, by twisting the second knob 410, the extension tube 420 is driven to rotate as a whole, and the rotating wire wheel 430 cooperates with the connecting rope 460 to pull the liquid blocking plate 440 to move inside the tube top slide groove 116. When the fixed tube body 110 is pulled out, the hemostatic forceps will not fall off from the incision of the intestinal wall, and the protective lens 450 is used to prevent the lens of the camera in the extension tube 420 from being contaminated by the intestinal wall mucosa.

[0061] In this embodiment, Fig.11 As shown, the piston part 500 includes a limit slider 510 that is displaced as the rotating tube 200 rotates as a whole, and a piston plate 540 that moves together with the limit slider 510;

[0062] Specifically, the limiting slider 510 is slidably connected to the inside of the limiting slide groove 112 , and a block protrusion 520 is welded on the outer wall of the limiting slider 510 , and the end of the block protrusion 520 extends to the inside of the tube wall protrusion groove 212 .

[0063] Furthermore, the piston plate 540 is slidably connected to the inside of the pull-out groove 113, and a number of regularly distributed connecting rods 530 are clamped between the piston plate 540 and the limit slider 510, one end of the connecting rod 530 is clamped to the top surface of the limit slider 510, and the other end is clamped to the bottom surface of the piston plate 540.

[0064] Furthermore, when the rotating tube 200 rotates as a whole, the contact position between the block protrusion 520 in the piston part 500 and the tube wall protrusion groove 212 on the rotating tube body 210 is constantly changing, thereby driving the limiting slider 510 to move downward inside the limiting slide groove 112, and then driving the piston plate 540 to move downward inside the pull-out groove 113 through the connecting rod 530, thereby generating negative pressure inside the ventilation groove 114, allowing the intestinal wall around the rectal medicine application area to be adsorbed on the outside of the suction hole 115.

[0065] When the device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus of the present invention is used, the medical staff directly inserts the fixed tube 110 into the rectum from the anus of the patient;

[0066] Next, the medical staff observes the situation in the patient's rectum through the camera inserted into the inner end of the extension tube 420, and adjusts the position of the fixed tube body 110 so that the observation slot 111 on the fixed tube body 110 covers the area of ​​the rectum where the medicine needs to be applied;

[0067] Then, the first knob 310 in the driving part 300 is twisted to drive the transmission rod 320 to rotate, and the worm 350 is driven to rotate. After the worm 350 contacts the worm wheel 360, the worm wheel 360 and the rotating rod 330 are driven to rotate, and then the rod end gear 340 at the end of the rotating rod 330 cooperates with the fixed ring gear 220 in the rotating tube 200, driving the rotating tube 200 to rotate, so that the docking groove 211 moves to the position of the observation groove 111;

[0068] When the rotating tube 200 rotates as a whole, the contact position between the block protrusion 520 in the piston part 500 and the tube wall protrusion groove 212 on the rotating tube body 210 is constantly changed, thereby driving the limiting slider 510 to move downward inside the limiting slide groove 112, and then driving the piston plate 540 to move downward inside the drawing groove 113 through the connecting rod 530, thereby generating negative pressure inside the ventilation groove 114, so that the intestinal wall around the rectal medication area is adsorbed on the outside of the suction hole 115;

[0069] Afterwards, the medical staff delivers the medicine into the space between the fixed tube body 110 and the inner tube body 120 through the through hole on the inner tube body 120 and fills it up, and then circulates the medicine in the space between the fixed tube body 110 and the inner tube body 120 through the drainage tube;

[0070] When minimally invasive surgery is required, the polyp on the rectum is removed through the through hole on the inner sleeve body 120, and hemostasis is performed using hemostatic forceps;

[0071] Next, the second knob 410 is twisted to drive the extension tube 420 to rotate as a whole, and the rotating wire wheel 430 cooperates with the connecting rope 460 to pull the liquid blocking plate 440 to move inside the tube top slide groove 116, so that when the fixed tube body 110 is pulled out, the hemostatic forceps will not fall off from the incision of the intestinal wall.

[0072] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A device for mechanical decompression drug delivery and minimally invasive surgery in the colorectal anus, comprising an insertion tube (100), a rotating tube (200) disposed inside the insertion tube (100), a driving portion (300) for driving the rotating tube (200) to rotate, a rotating portion (400) disposed inside the insertion tube (100), and a piston portion (500) that moves as the rotating tube (200) rotates; Features: The insertion tube (100) comprises a fixed tube body (110), an inner tube body (120) arranged inside the fixed tube body (110), and a limiting ring body (130) arranged on the inner tube wall of the inner tube body (120); the tube wall of the fixed tube body (110) is provided with an observation groove (111) that penetrates inside and outside; The rotating tube (200) comprises a rotating tube body (210) and fixed ring teeth (220) arranged on the bottom surface of the rotating tube body (210); The driving part (300) comprises a first knob (310), a transmission rod (320) that rotates together with the first knob (310), a rotating rod (330) that rotates along with the rotation of the transmission rod (320), and a rod end gear (340) disposed at the top end of the rotating rod (330); The rotating part (400) comprises a second knob (410), a wire wheel (430) that rotates together with the second knob (410), a liquid blocking plate (440) that moves along with the rotation of the wire wheel (430), and a pressure spring (470) that pushes the liquid blocking plate (440) toward the observation slot (111) by its own elastic force; The piston part (500) comprises a limit slider (510) that is displaced as the rotating tube (200) rotates as a whole, and a piston plate (540) that moves together with the limit slider (510); The inner wall of the fixed tube body (110) is provided with a limit slide groove (112) for providing a moving range for the internal structure of the piston part (500); the inner wall of the fixed tube body (110) is provided with a pull-out groove (113) above the limit slide groove (112); the interior of the fixed tube body (110) is provided with a ventilation groove (114) connected to the pull-out groove (113); the outer wall of the fixed tube body (110) is provided with an air suction hole (115) connected to the ventilation groove (114) at a peripheral position of the observation groove (111); the top wall of the fixed tube body (110) is provided with a tube top slide groove (116) and a rotation groove (117) connected to the tube top slide groove (116); The inner sleeve body (120) is provided with a plurality of through holes for inserting surgical instruments and drugs; The rotating tube body (210) is rotatably connected to the interior of the fixed tube body (110), and a docking groove (211) matching the size of the observation groove (111) is provided on the outer wall of the rotating tube body (210); The limiting sliding block (510) is slidably connected to the interior of the limiting sliding groove (112); The piston plate (540) is slidably connected to the interior of the drawing groove (113).

2. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 1, characterized in that: The inner sleeve body (120) is fixed to the fixed tube body (110) by welding, the top surface level of the inner sleeve body (120) is the same as the top surface level of the limiting ring body (130), and the limiting ring body (130) and the fixed tube body (110) are integrally formed.

3. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 2, characterized in that: A tube wall convex groove (212) is provided on the outer tube wall of the rotating tube body (210), and the fixed ring teeth (220) are welded and fixed to the bottom surface of the bottom ring plate of the rotating tube body (210).

4. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 1, characterized in that: The first knob (310) is fixedly engaged with the transmission rod (320), the transmission rod (320) is rotatably connected to the tube wall of the fixed tube body (110), and a worm (350) is sleeved on the outer wall of the transmission rod (320) near the center.

5. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 4, characterized in that: The rotating rod (330) is rotatably connected to the bottom tube wall of the fixed tube body (110); a rod end gear (340) is welded and fixed to the end position of the rotating rod (330); the rod end gear (340) is meshed with the fixed ring gear (220); and a worm wheel (360) meshed with the worm (350) is clamped at the bottom end position of the rotating rod (330).

6. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 1, characterized in that: An extension tube (420) is welded to the top end of the second knob (410), the extension tube (420) is rotatably connected to the inside of the inner sleeve body (120), a protective lens (450) is clamped on the tube wall at the top end of the inner side of the extension tube (420), the wire wheel (430) is clamped and fixed on the tube wall of the extension tube (420) near the top end, and the wire wheel (430) is rotatably connected to the inside of the rotating groove (117).

7. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 1, characterized in that: The liquid blocking plate (440) is slidably connected to the inside of the tube top slide groove (116); a connecting rope (460) is connected between the liquid blocking plate (440) and the wire wheel (430); one end of the connecting rope (460) is wound around the outside of the wire wheel (430); one end of the pressure spring (470) is welded to the groove wall of the groove on the inner side of the liquid blocking plate (440) and the other end is welded to the groove wall of the tube top slide groove (116).

8. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 3, characterized in that: A block protrusion (520) is welded on the outer side wall of the limiting sliding block (510), and the end of the block protrusion (520) extends to the inside of the tube wall protrusion groove (212).

9. The device for mechanical decompression drug delivery and minimally invasive surgery of the colorectal anus according to claim 8, characterized in that: A plurality of regularly distributed connecting rods (530) are clamped between the piston plate (540) and the limiting slider (510), one end of the connecting rod (530) being clamped to the top surface of the limiting slider (510) and the other end being clamped to the bottom surface of the piston plate (540).

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