Pear-shaped fossa fistula distraction device

Abstract

The invention relates to the technical field of medical instruments, in particular to a piriform fossa dilator which comprises a through pipe detachably installed on a fixing box, a push rod cavity and a suction cavity are formed in the through pipe in parallel, and a push rod is arranged in the push rod cavity and the fixing box in a sliding mode; one end of the push rod is an expansion end, and the expansion end has multiple stages of expansion states with different inner diameter sizes; a movable handle is rotationally arranged in the fixed box, and the rotating end, located in the fixed box, of the movable handle is rotationally and slidably connected with the push rod; the movable handle is operated to rotate around the fixed box so that the push rod can horizontally slide in the fixed box and the through pipe. And a part of the suction tube penetrates through the shell of the fixed box and is hermetically connected with the suction cavity. According to the piriform fistula dilator, the expansion end adopts the extending supporting structure with different lengths, so that the expansion end gradually goes deep into a relatively narrow fistula opening area of piriform fistula, an inverted inclined plane triangular supporting surface is formed in the fistula opening of the piriform fistula, and the effect of dilating a fistula film of the piriform fistula can be achieved; the fistula film is effectively prevented from being torn due to excessive opening in the initial stage of stretching; the expansion end simultaneously adopts a multi-stage extension support structure so as to adapt to different inner diameter transition support requirements of piriform fossa fistula with narrow upper part and wide lower part; the piriform fossa fistula deformation in different states is fully exposed, and the fistula at the far end is fully tracked and exposed.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically a piriformis fistula opener. Background Technology

[0002] Piriformsinus fistula (PSF) is a rare congenital disorder with an unclear etiology. It may be related to incomplete regression or perforation of the third or fourth branchial cleft during early embryonic development, accounting for approximately 2% to 10% of branchial cleft malformations. 93% to 97% of PSF cases occur on the left side, possibly due to factors such as the left fistula being longer and more anatomically complex, as well as asymmetrical vascular development.

[0003] Treatment of pyriformis fistula is generally divided into two categories: external approach open fistula excision and endoscopic-assisted cauterization. Given the current trend of minimally invasive surgery in medicine, endoscopic treatment is the preferred first-line treatment method in clinical practice. Furthermore, among all endoscopic-assisted procedures, radical and complete excision of the fistula is the preferred treatment method to prevent recurrence.

[0004] Since pyriformis fistula is a type of stenotic mucosal canal that extends downwards, its course and degree of stenosis are difficult to fully expose during surgery. Under the support of a laryngoscope, the location of the fistula opening in the pyriformis fistula is not difficult to find, but whether the tip of the pyriformis fistula can be exposed and treated under direct vision becomes the key issue for complete cure.

[0005] Currently, the common clinical method for exposing the pyriform fossa involves using a suction device to simultaneously draw and open the fistula to one side. This method is effective for fistulas with shallow openings, but its effectiveness is less pronounced in cases with relatively thin or long fistulas, increasing the likelihood of recurrence. Therefore, there is an urgent clinical need for a device that can assist in opening the pyriform fossa during laryngoscopy, revealing its course and fully tracing and exposing the distal fistula. Whether using radiofrequency ablation or carbon dioxide laser therapy, this device could minimize the recurrence rate and achieve a minimally invasive cure. Summary of the Invention

[0006] The purpose of this invention is to provide a piriform fossa fistula opener to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A piriform fossa fistula opener includes: a tube, which is detachably mounted on a fixing box and extends through the shell of the fixing box into the interior of the fixing box;

[0009] The passage tube has a push rod cavity and a suction cavity arranged in parallel inside. The push rod is slidably disposed in the push rod cavity and the fixed box. The end of the push rod away from the fixed box is an expansion end, which can be completely confined within the wall of the passage tube. When the push rod slides away from the wall of the passage tube, the expansion end can break away from the constraint of the wall of the passage tube to form an expansion support surface of a preset shape. The expansion end has multiple expansion states with different inner diameters.

[0010] The fixed box is rotatably equipped with a movable handle inside, and the gripping end of the movable handle extends out of the shell of the fixed box. A fixed handle is also provided on the shell of the fixed box corresponding to the movable handle. The rotating end of the movable handle located inside the fixed box is rotatably and slidably connected to the push rod. Operating the movable handle to rotate around the fixed box can make the push rod slide horizontally inside the fixed box and the through pipe.

[0011] A portion of the suction tube penetrates the housing of the fixed box and is sealed to the suction cavity of the through tube.

[0012] Preferably, the expansion end has two expansion states;

[0013] The expansion end includes three independent expansion branches, the ends of which, away from the push rod, are respectively the first expansion head, the second expansion head, and the third expansion head;

[0014] The first expansion head is fixedly connected to the push rod via a first expansion head connecting rod and a secondary expansion connecting rod; the second expansion head is fixedly connected to the push rod via a second expansion head connecting rod and a secondary expansion connecting rod; the third expansion head is fixedly connected to the push rod via a third expansion head connecting rod and a secondary expansion connecting rod.

[0015] The secondary expansion link consists of three arc-shaped elastic links with the same length and radius. The first expansion head link, the second expansion head link, and the third expansion head link are arc-shaped elastic links with different lengths and radii. The length of the first expansion head link is greater than the length of the second expansion head link, and the length of the second expansion head link is greater than the length of the third expansion head link. The diameter of the first expansion head is the same as the inner diameter of the push rod cavity opening.

[0016] Preferably, the through-tube extending into the fixed box consists of a push rod guide tube and a suction guide tube that are parallel to each other; the length of the suction guide tube is shorter than that of the push rod guide tube.

[0017] Preferably, the fixed box is provided with a push rod fixing plate corresponding to the center of the push rod connecting tube, and the center of the push rod fixing plate is provided with a through hole matching the outer diameter of the push rod connecting tube. When the connecting tube is installed on the fixed box, the push rod connecting tube extends into the through hole of the push rod fixing plate.

[0018] The push rod fixing plate is provided with a first sliding groove and a second sliding groove in sequence in the direction away from the push rod receiving tube at the rear end, and the second sliding groove is coaxial with the push rod cavity;

[0019] The fixed box has a central hole in the center of the box body, and a central shaft passes through the central hole to form a fixed rotation axis in the cavity of the fixed box; a third sliding groove is formed on the gripping end shell of the fixed box near the movable handle; a fixed handle hole is also formed on the starting end shell of the fixed box near the third sliding groove.

[0020] The housing of the fixing box is also provided with a rotating hole.

[0021] Preferably, the fixed box is divided into two parts: a bottom box and a top box, and the bottom box and the top box are detachably connected.

[0022] The top box has a positioning groove on its upper housing near the third sliding groove. The positioning groove is arc-shaped and its center coincides with the rotation center of the movable handle. The positioning groove has grooves in the normal direction, which correspond to the rotation angle of the movable handle when the expansion end is in different extended states.

[0023] Preferably, a push plate and a push plate slide rod are fixedly provided sequentially at the connecting end of the push rod away from the expansion end;

[0024] When the push plate slides within the push rod cavity, the push rod passes through the push rod guide tube and the fixing plate; the push plate is engaged in the first sliding groove and slides along the central axis of the push rod cavity, and the push plate slide rod is engaged in the second sliding groove and slides along the central axis of the push rod cavity;

[0025] The push plate has a push plate groove perpendicular to the sliding direction of the push rod, and the push rod rotates and slides in the push plate groove.

[0026] Preferably, the movable handle extends through the third sliding groove into the internal cavity of the fixed box and rotates around the central axis;

[0027] The rotating end of the movable handle located inside the fixed box is respectively provided with a rotating connecting rod, a rotating block and a rotating connecting groove;

[0028] The rotating block is a flattened cylinder with a through hole at its central axis that matches the central axis. The central axis passes through the rotating block and the fixed box. The central axes of the rotating connecting rod and the rotating connecting groove are collinear and symmetrical with respect to the rotation center of the rotating block.

[0029] A through hole matching the outer diameter of the rotary push rod is opened at the end of the rotary connecting rod away from the rotating block. The rotary push rod passes through the rotary connecting rod and rotates and slides in the push plate groove. A through groove is also opened in the middle of the rotary connecting rod.

[0030] A positioning rod is provided in the connecting groove, and the positioning rod is aligned with the normal direction of the positioning groove; a spring and a positioning block are respectively sleeved on the outer periphery of the positioning rod, and the two ends of the spring respectively abut against the inner wall of the connecting groove away from the third sliding groove and the positioning block; the positioning block extends through the positioning groove and out of the top box to form a protruding end.

[0031] Preferably, a portion of the suction tube extends through the exit hole into the interior of the fixing box and is sealed to the suction connection tube of the through tube.

[0032] Preferably, the bottom box has a bottom box socket on its body, and the top box has a top box insert that matches the bottom box socket on its body. When the top box insert is inserted into the bottom box socket, the relative positions of the bottom box and the top box are fixed.

[0033] Preferably, the through pipe and the fixing box are detachably connected by screws.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] 1. The present invention provides a piriformis fistula opener, wherein the expansion end adopts an extended support structure with varying lengths, allowing the expansion end to gradually penetrate into the relatively narrow fistula opening area of ​​the piriformis fistula, forming an inverted sloping triangular support surface inside the fistula opening. This effectively opens the fistula membrane of the piriformis fistula while avoiding excessive opening and tearing of the fistula membrane in the initial stage of insertion. The expansion end also adopts a two-stage extended support structure to adapt to the transition support requirements of different inner diameters of the piriformis fistula, which are narrower at the top and wider at the bottom. This fully exposes the course of the piriformis fistula in different states and fully tracks and exposes its distal fistula.

[0036] 2. The piriform fossa fistula opener provided by the present invention achieves different extension states of the expansion end through the cooperation of the positioning components of the movable handle and the fixed box, while providing convenience for one-handed operation;

[0037] 3. The piriformis fistula opener provided by the present invention achieves the merging and separation of the push rod sliding passage and the suction passage by extending the front and rear ends of the tube into the fixed box with different length structures, saving the diameter space of the tube that goes deep into the laryngeal cavity, and realizing the combination connection requirements of different passage components and devices.

[0038] 4. The piriform fossa fistula opener provided by this invention can be made of mature existing medical device materials for each component, with controllable cost and good prospects for industrial-scale production. Attached Figure Description

[0039] Figure 1 An overall view of a piriformis fistula opener;

[0040] Figure 2 An exploded view of the main components of a piriformis fistula opener;

[0041] Figure 3 This is a cross-sectional view of the pipe at point A;

[0042] Figure 4 A cross-sectional view of the converging tube at the expanding end;

[0043] Figure 5 This is a cross-sectional view of the first-stage extended section of the expansion pipe.

[0044] Figure 6 This is a cross-sectional view of the second-stage extended section of the conduit at the expansion end.

[0045] Figure 7 Detailed structural diagram of the pipe fixing end at point B;

[0046] Figure 8 This is a diagram of the internal structure of the fixing box;

[0047] Figure 9 This is a structural diagram of the push rod connection end;

[0048] Figure 10 Here is an exploded view of the active handle;

[0049] Figure 11 A detailed diagram of the connection structure between the push rod and the movable handle at point C;

[0050] Figure 12 This is a diagram showing the overall connection structure of the internal components of the fixed box.

[0051] In the diagram: 1. Through pipe; 1a. Push rod cavity; 1b. Suction cavity; 1c. Through pipe screw hole; 1-1. Fixing plate; 1-2. Push rod connecting pipe; 1-3. Suction connecting pipe; 2. Expansion end; 2a. First expansion head; 2b. Second expansion head; 2c. Third expansion head; 2-1. Secondary expansion connecting rod; 2-2a. First expansion head connecting rod; 2-2b. Second expansion head connecting rod; 2-2c. Third expansion head connecting rod; 3. Fixing box; 3a. Center hole; 3b. Rotation hole; 3c. Fixing box screw hole; 3d. Fixing handle hole; 3-1. Connector end; 3- 2. Push rod fixing plate; 3-3. First sliding groove; 3-4. Second sliding groove; 3-5. Third sliding groove; 31. Base box; 31a. Base box insertion hole; 32. Top box; 32a. Positioning groove; 32-1. Top box insertion post; 4. Push rod; 4a. Push plate sliding groove; 4-1. Push plate; 4-2. Push plate sliding rod; 5. Movable handle; 5-1. Rotating connecting rod; 5-2. Rotating block; 5-3. Rotating connecting groove; 5-4. Positioning rod; 6. Fixed handle; 7. Suction tube; 8. Central shaft; 9. Spring; 10. Positioning block; 11. Rotating push rod; 12. Screw. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0054] like Figures 1-3 As shown, the present invention provides a piriform fossa fistula opener, including a through tube 1, which is detachably installed on a fixing box 3. The through tube 1 extends through the shell of the fixing box 3 and into the interior of the fixing box 3.

[0055] Inside the tube 1, there are parallel arrangement of a push rod cavity 1a and a suction cavity 1b. The push rod 4 is slidably disposed within the push rod cavity 1a and the fixing box 3 of the tube 1. The end of the push rod 4 away from the fixing box 3 is the expansion end 2, which can be completely constricted within the tube wall of the tube 1. When the push rod 4 slides away from the tube wall of the tube 1, the expansion end 2 can break free from the tube wall constraint of the tube 1 to form an expansion support surface of a preset shape. The expansion end 2 has multiple expansion states with different inner diameters.

[0056] The fixed box 3 is equipped with a movable handle 5 inside, and the gripping end of the movable handle 5 extends out of the shell of the fixed box 3. A fixed handle 6 is also provided on the shell of the fixed box 3 corresponding to the movable handle 5, which is convenient for the operator to hold. The rotating end of the movable handle 5 inside the fixed box 3 is rotatably and slidably connected to the push rod 4. By operating the movable handle 5 to rotate around the fixed box 3, the push rod 4 can slide horizontally inside the fixed box 3 and the through pipe 1.

[0057] A portion of the suction tube 7 passes through the shell of the fixing box 3 and is sealed to the suction cavity 1b of the connecting tube 1, serving as a suction channel connecting the suction device to the surgical area inside the patient's body, facilitating the operator to remove gas and abnormal bleeding from the surgical cavity.

[0058] like Figures 4-6 As shown, in one embodiment of the present invention, the expansion end 2 has a two-stage expansion state. Specifically, the expansion end 2 includes three independent expansion branches. The ends of the three independent expansion branches away from the push rod 4 are respectively the first expansion head 2a, the second expansion head 2b, and the third expansion head 2c. The ends of the three independent expansion branches are all spherical to avoid tearing of the membrane when inserted into the piriform fossa fistula.

[0059] The first expansion head 2a is fixedly connected to the push rod 4 via the first expansion head connecting rod 2-2a and the secondary expansion connecting rod 2-1; the second expansion head 2b is fixedly connected to the push rod 4 via the second expansion head connecting rod 2-2b and the secondary expansion connecting rod 2-1; the third expansion head 2c is fixedly connected to the push rod 4 via the third expansion head connecting rod 2-2c and the secondary expansion connecting rod 2-1. The secondary expansion connecting rod 2-1 consists of three arc-shaped elastic connecting rods of the same length and radius, while the first expansion head connecting rods 2-2a, 2-2b, and 2-2c are arc-shaped elastic connecting rods of different lengths and radii. The length of the first expansion head connecting rod 2-2a is greater than the length of the second expansion head connecting rod 2-2b, and the length of the second expansion head connecting rod 2-2b is greater than the length of the third expansion head connecting rod 2-2c. The diameter of the first expansion head 2a is the same as the inner diameter of the opening of the push rod cavity 1a, and is greater than the diameters of the second expansion head 2b and the third expansion head 2c.

[0060] like Figure 4As shown, when the expansion end 2 is completely constricted inside the push rod cavity 1a of the through tube 1, the three equal-diameter secondary expansion connecting rods 2-1 are squeezed together to form an ellipsoidal shape; the starting ends of the first expansion head connecting rod 2-2a, the second expansion head connecting rod 2-2b, and the third expansion head connecting rod 2-2c connected to the secondary expansion connecting rod 2-1 are close to each other and located at the same cross section, but because their lengths are different, they form three different ellipsoids; the third expansion head 2c is closest to the push rod 4, and the first expansion head 2a is farthest from the push rod 4, and completely seals the opening of the push rod cavity 1a.

[0061] The function of the first dilator 2a in closing the opening of the pusher cavity 1a is to prevent sputum and other substances from contaminating the deeper parts of the tube wall when the tube 1 extends out of the patient's larynx, thus avoiding blockage and affecting the outward extension of the dilator end 2. When the diameter of the first dilator 2a is the same as the inner diameter of the pusher cavity 1a, the diameters of the second dilator 2b and the third dilator 2c should be smaller than the diameter of the first dilator 2a to facilitate the complete retraction of the dilator end 2. In another embodiment of the present invention, the tube wall portion of the tube 1 that converges to the dilator end 2 can be designed to accommodate the maximum arcuate outer periphery of the ellipsoid enclosed by the proximal dilator head and the distal connecting rod, so that the distal dilator head can have a sealing effect on the tube wall opening while maintaining the same diameter of multiple dilators.

[0062] like Figure 5 As shown, when the expansion end 2 is in the first-stage extended state, the three equal-diameter secondary expansion connecting rods 2-1 are still squeezed by the pipe wall of the through pipe 1, maintaining the enclosed equal-diameter ellipsoid state. The starting ends of the first expansion head connecting rod 2-2a, the second expansion head connecting rod 2-2b, and the third expansion head connecting rod 2-2c connected to the secondary expansion connecting rod 2-1 are located at the opening plane of the push rod cavity 1a. The first expansion head connecting rod 2-2a, the second expansion head connecting rod 2-2b, and the third expansion head connecting rod 2-2c are completely freed from the pipe wall constraint, restoring their respective preset semi-circular arcs, so that the first expansion head 2a, the second expansion head 2b, and the third expansion head 2c expand and extend in three directions at different angles to the push rod 4's propulsion axis. The center line connecting the first expansion head 2a, the second expansion head 2b, and the third expansion head 2c forms an oblique triangle.

[0063] A pyriform fossa fistula is a narrowed mucosal passage that extends downwards along the laryngeal wall. When the tube 1 is inserted near the upper opening of the pyriform fossa fistula in the patient's larynx, the first dilator 2a rests against the laryngeal wall, causing the laryngeal wall to slightly indent inwards. At this time, the opening of the mucosal passage of the pyriform fossa fistula will become more obvious. Slowly push the push rod 4, and the first dilator 2a gradually penetrates deeper into the pyriform fossa fistula. The second dilator 2b and the third dilator 2c enter the pyriform fossa fistula in sequence and separate at an angle from each other. Because the center line connecting the first dilator 2a, the second dilator 2b, and the third dilator 2c forms an oblique triangle, when the dilator end 2 completes the first stage of extension, the first dilator 2a provides support inside the fistula opening of the pyriform fossa, while the second dilator 2b and the third dilator 2c provide support at positions gradually approaching the edge of the fistula opening. In other words, the mucosa of the pyriform fossa fistula is stretched open in a funnel shape from the inside out. The closer to the fistula opening of the pyriform fossa fistula, the greater the separation distance between the mucosa and the laryngeal wall, providing sufficient space for the operation of cauterizing and eliminating the mucosa from top to bottom, thus avoiding damage to the laryngeal wall.

[0064] like Figure 6 As shown, when the expansion end 2 is in the second-stage extended state, the three equal-diameter secondary expansion connecting rods 2-1 are separated from the tube wall of the tube 1 and restore the preset semi-circular arc shape. Since the radial direction of the three semi-circular arcs is at a certain angle to the pushing direction of the push rod 4, it will push the first expansion head 2a and the first expansion head connecting rod 2-2a, the second expansion head 2b and the second expansion head connecting rod 2-2b, the third expansion head 2c and the third expansion head connecting rod 2-2c to continue to expand in different directions, thereby expanding the maximum diameter of the funnel-shaped expansion space in the piriform fossa fistula.

[0065] Because pyriform fistulas are typically pear-shaped, narrower at the top and wider at the bottom, an excessively large opening can lead to mucosal tears at the top. These tears are more difficult to fix and accurately cauterize. Conversely, an excessively small opening can prevent the lower mucosa from being fully expanded and completely cauterized, leaving a risk of recurrence.

[0066] The present invention provides an extended support structure with varying lengths, allowing the expansion end to gradually penetrate into the narrower fistula opening area of ​​the pyriform fossa fistula. This forms an inverted triangular support surface inside the fistula opening, effectively both opening and tearing the fistula membrane. The invention also provides a secondary extended support structure to accommodate the transitional support requirements of different inner diameters in pyriform fossa fistulas (narrower at the top and wider at the bottom).

[0067] Because patients have different body types, the support size requirements for pyriform fossa fistulas differ between children and adults. In other embodiments of the present invention, multi-level extending expansion support structures and support branches of different lengths can be added as needed to adapt to different mucosal support sizes and depths of pyriform fossa fistulas.

[0068] In a preferred embodiment of the present invention, the outer diameter of the pusher cavity 1a suitable for pediatric patients is 3 mm, the outer diameter of the suction cavity 1b is 1 mm, that is, the maximum diameter of the tube 1 inserted into the patient's larynx is 4 mm; the diameter of the first-stage expansion surface of the expansion end 2 is 2 mm, and the diameter of the second-stage expansion surface is 5 mm.

[0069] like Figures 7-8 As shown, in one embodiment of the present invention, the through pipe 1 and the fixing box 3 are detachably connected by screws 12. Specifically, a fixing plate 1-1 is fixedly installed at the fixed end of the through pipe 1 away from the expansion end 2. The fixing plate 1-1 has through pipe screw holes 1c around the push rod cavity 1a and the suction cavity 1b. The housing of the fixing box 3 that contacts the through pipe 1 is the connector end 3-1. The connector end 3-1 has fixing box screw holes 3c that correspond to and match the through pipe screw holes 1c. The fixing plate 1-1 of the through pipe 1 can be fixedly installed on the connector end 3-1 of the fixing box 3 by a number of screws 12 that are threaded to the through pipe screw holes 1c and the fixing box screw holes 3c and have matching lengths.

[0070] It is understandable that the detachable connection between the conduit 1 and the fixing box 3 should not be limited to screw connection, but can also be achieved through snap-fit, plug-in post and other means.

[0071] The connector end 3-1 of the fixed box 3 is also provided with a through hole matching the outer diameter of the through pipe 1. The through pipe 1 passes through the through hole in the center of the connector end 3-1, passes through the shell of the fixed box 3, and extends horizontally into the interior of the fixed box 3. The push rod guide pipe 1-2 and the suction guide pipe 1-3 are parallel to each other extending into the fixed box 3. The push rod cavity 1a passes through the through pipe 1, the fixed plate 1-1, and the push rod guide pipe 1-2; the suction cavity 1b passes through the through pipe 1, the fixed plate 1-1, and the suction guide pipe 1-3.

[0072] The fixed box 3 is equipped with a push rod fixing plate 3-2 corresponding to the center of the push rod connecting tube 1-2. The center of the push rod fixing plate 3-2 has a through hole that matches the outer diameter of the push rod connecting tube 1-2. When the connecting tube 1 is installed on the fixed box 3, the push rod connecting tube 1-2 extends into the through hole of the push rod fixing plate 3-2, so that the position of the push rod connecting tube inside the fixed box 3 is stable on the sliding path of the push rod 4.

[0073] The length of the suction guide tube 1-3 is shorter than that of the push rod guide tube 1-2, which facilitates connection to the suction tube 7, which bends and turns inside the fixed box 3. The push rod guide tube 1-2 and the suction guide tube 1-3 separate the push rod cavity 1a and the suction cavity 1b of the push rod 4 sliding passage, which are parallel and merged at the front end of the through tube 1, inside the fixed box 3, which facilitates connection to other functional components in different directions.

[0074] like Figures 8-9 , Figure 12As shown, a push plate 4-1 and a push plate slide rod 4-2 are sequentially fixed at the connecting end of the push rod 4 away from the expansion end 2. The vertical section height of the push plate 4-1 is greater than the vertical section diameter of the push rod 4 and the push plate slide rod 4-2. Inside the fixed box 3, a first sliding groove 3-3 and a second sliding groove 3-4 are sequentially arranged at the rear end of the push rod fixing plate 3-2 away from the push rod connecting pipe 1-2. The second sliding groove 3-4 is coaxial with the push rod cavity 1a. When the push plate 4 slides in the push rod cavity 1a, the push rod 4 passes through the push rod connecting pipe 1-2 and the fixing plate 3-2. The push plate 4-1 is engaged in the first sliding groove 3-3 and slides along the central axis of the push rod cavity 1a. The push plate slide rod 4-2 is engaged in the second sliding groove 3-4 and slides along the central axis of the push rod cavity 1a.

[0075] A push plate groove 4a is provided on the push plate 4-1 in the sliding direction perpendicular to the push rod 4, and the push rod 11 is rotated and slidably disposed in the push plate groove 4a.

[0076] like Figure 8 , Figures 10-12 As shown, a central hole 3a is formed in the center of the fixed box 3, and a central shaft 8 passes through the central hole 3a, forming a fixed rotation axis in the cavity of the fixed box 3. The movable handle 5 rotates relative to the fixed box 3 around the central shaft 8.

[0077] Specifically, a third sliding groove 3-5 is formed on the housing of the fixed box 3 near the gripping end of the movable handle 5. The movable handle 5 extends through the third sliding groove 3-5 into the internal cavity of the fixed box 3 and rotates around the central axis 8. The third sliding groove 3-5 is an arc-shaped groove, with the two ends being the starting end and the ending end of the rotation of the movable handle 5, respectively. When the movable handle 5 rotates to the starting end, the expanding end 2 is constricted within the wall of the through pipe 1; when the movable handle 5 rotates to the ending end, the expanding end 2 is in the second-stage extended state. A fixed handle hole 3d is also formed on the housing of the fixed box 3 near the starting end of the third sliding groove 3-5. The fixed handle 6 is installed on the housing of the fixed box 3 through the fixed handle hole 3d.

[0078] Furthermore, the rotating end of the movable handle 5 located inside the fixed box 3 is respectively provided with a connecting rod 5-1, a rotating block 5-2, and a connecting groove 5-3; wherein the rotating block 5-2 is a flat cylinder with a thickness matching the thickness of the fixed box 3, so that the movable handle 5 is fixed in the thickness direction inside the fixed box 3. A through hole matching the central shaft 8 is opened at the central axis of the rotating block 5-2 cylinder, and the central shaft 8 passes through the rotating block 5-2 and the fixed box 3, so that the movable handle 5 is fixed in the horizontal and vertical directions inside the fixed box 3, and the rotating end of the movable handle can rotate circumferentially around the central shaft 8 inside the fixed box 3.

[0079] The central axes of the connecting rod 5-1 and the connecting groove 5-3 are collinear, and the central axes of the connecting rod 5-1 and the connecting groove 5-3 are symmetrically arranged relative to the rotation center of the rotating block 5-2.

[0080] A through hole matching the outer diameter of the rotary push rod 11 is formed at the end of the connecting rod 5-1 furthest from the rotating block 5-2. The rotary push rod 11 passes through the connecting rod 5-1 and can rotate and slide within the push plate groove 4a. A through groove is formed in the middle of the connecting rod 5-1 to avoid affecting the horizontal sliding of the push plate 4-1. When the connecting rod 5-1 rotates relative to the central axis 8, the end of the connecting rod 5-1 generates a tangential displacement, which drives the rotary push rod 11 to generate a horizontal pushing and pulling force in the push plate groove 4a, causing the push plate 4-1 to slide horizontally in the through groove in the middle of the connecting rod 5-1, thereby causing the push rod 4 to slide horizontally inside the push rod cavity 1a.

[0081] Furthermore, in an embodiment of the present invention, the extended state of the expansion end 2 can be fixed.

[0082] Specifically, such as Figure 1 , Figure 8 and Figure 12 As shown, the fixed box 3 consists of two parts: a bottom box 31 and a top box 32, which are detachably connected. The bottom box 31 has a bottom box insertion hole 31a on its contact surface with the top box 32, and the top box 32 has a top box insertion post 32-1 on its contact surface with the bottom box 31, which matches the bottom box insertion hole 31a. When the top box insertion post 32-1 is inserted into the bottom box insertion hole 31a, the relative positions of the bottom box 31 and the top box 32 are fixed. This separate design of the bottom box 31 and the top box 32 facilitates the disassembly and installation of the internal components of the fixed box 3, and makes cleaning and disinfection easier.

[0083] It is understandable that the bottom box 31 and the top box 32 are not limited to the connection by the plug-in method, but can also be detachably connected by means of threads or buckles.

[0084] The top box 32 has a positioning groove 32a near the upper end of the third sliding groove 3-5. The positioning groove 32a is an arc-shaped groove, and the center of the arc-shaped groove coincides with the rotation center of the movable handle 5. The positioning groove 32a has three sub-grooves along its arc-shaped normal direction, which correspond to the rotation angle of the movable handle 5 when the expansion end 2 is in the contracted state, the first stage extension state of the expansion end 2, and the second stage extension state of the expansion end 2, respectively.

[0085] The number of slots in the positioning groove 32a is consistent with the number of extension states of the expansion end 2.

[0086] A positioning rod 5-4 is installed in the connecting groove 5-3 of the movable handle 5, and the positioning rod 5-4 is aligned with the normal direction of the positioning groove 32a. A spring 9 is sleeved on the outer periphery of the positioning rod 5-4. One end of the spring 9 abuts against the inner wall of the connecting groove 5-3 away from the third sliding groove 3-5, and the other end abuts against the slider of the positioning block 10. The slider of the positioning block 10 is slidably sleeved on the positioning rod 5-4, and the slider connecting rod of the positioning block 10 extends through the positioning groove 32a and beyond the top box 32, forming a protruding end. Pushing the protruding end of the positioning block 10 beyond the top box 32 allows the positioning block 10 to slide on the positioning rod 5-4, thus moving the positioning block 10 in the normal direction of the positioning groove 32a. The spring 9 applies an elastic thrust in the opposite direction to the positioning block 10, allowing the positioning block 10 to engage in the groove of the positioning groove 32a.

[0087] When the movable handle 5 is rotated to the corresponding slot of the positioning groove 32a, the positioning block 10 will automatically lock into the slot under the action of the spring 9. At this time, the rotation angle of the movable handle 5 is fixed, and the expansion end 2 maintains its current state. When it is necessary to rotate the movable handle 5, push the protruding end of the positioning block 10 beyond the top box 32 towards the central axis 8, so that it moves to the arc-shaped main support of the positioning groove 32a, thereby changing the rotation angle of the movable handle 5.

[0088] This invention is designed for single-handed operation. Specifically, during use, the operator can grip the handle of the fixed handle 6 with their thumb, grip the handle of the movable handle 5 with their middle finger, and flexibly push the protruding end of the positioning block 10 with their index finger.

[0089] like Figure 12 As shown, a turning hole 3b is also provided on the lower housing of the connector end 3-1 of the fixing box 3. A part of the suction tube 7 extends through the turning hole 3b into the interior of the fixing box 3 and is sealed to the suction lead tube 1-3 of the through tube 1. The remaining part of the suction tube 7 protrudes outside the housing of the fixing box 3 for easy connection to the suction device interface.

[0090] In this invention, the suction tube 7 is made of a material with a certain degree of elasticity, such as medical silicone; the other components are all made of rigid materials, such as metal.

[0091] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0092] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A piriformis fistula opener, characterized in that, The utility model provides a kind of medical treatment device, including: Through pipe (1), the through pipe (1) is detachably mounted on fixed box (3), the through pipe (1) extends to the inside of box body of the fixed box (3) through the shell of the fixed box (3); Parallelly arranged push rod cavity (1a) and suction cavity (1b) are provided inside the through pipe (1), and push rod (4) is slidably arranged in the push rod cavity (1a) and the fixed box (3);The end of the push rod (4) away from the fixed box (3) is the expansion end (2), the expansion end (2) can be completely collected in the pipe wall of the through pipe (1);When the push rod (4) slides away from the pipe wall of the through pipe (1), the expansion end (2) can be released from the pipe wall of the through pipe (1) and form the expansion support surface of preset shape, the expansion end (2) has multiple levels of different inner diameter size expansion state; Rotatably arranged movable handle (5) is arranged inside the fixed box (3), the holding end of the movable handle (5) is stretched out from the shell of the fixed box (3), and the fixed handle (6) is also arranged on the shell of the fixed box (3) corresponding to the movable handle (5);The rotating end of the movable handle (5) located inside the fixed box (3) is rotatably and slidably connected with the push rod (4);Rotating the movable handle (5) around the fixed box (3) can make the push rod (4) slide horizontally inside the fixed box (3) and the through pipe (1); A part of the pipe body of suction pipe (7) penetrates the shell of the fixed box (3) and is hermetically connected with the suction cavity (1b) of the through pipe (1).

2. The piriform fistula spreader of claim 1, wherein, The expansion end (2) has two levels of expansion state; The expansion end (2) includes three independent expansion branches, and the first expansion head (2a), the second expansion head (2b) and the third expansion head (2c) are respectively away from the head end of the push rod (4); The first expansion head (2a) is fixedly connected with the push rod (4) through the first expansion head connecting rod (2-2a) and the second expansion connecting rod (2-1);The second expansion head (2b) is fixedly connected with the push rod (4) through the second expansion head connecting rod (2-2b) and the second expansion connecting rod (2-1);The third expansion head (2c) is fixedly connected with the push rod (4) through the third expansion head connecting rod (2-2c) and the second expansion connecting rod (2-1); The second expansion connecting rod (2-1) is three arc-shaped elastic connecting rods with consistent length and consistent radius, and the first expansion head connecting rod (2-2a), the second expansion head connecting rod (2-2b) and the third expansion head connecting rod (2-2c) are arc-shaped elastic connecting rods with inconsistent length and inconsistent radius;The length of the first expansion head connecting rod (2-2a) is greater than the length of the second expansion head connecting rod (2-2b), and the length of the second expansion head connecting rod (2-2b) is greater than the length of the third expansion head connecting rod (2-2c);The diameter of the first expansion head (2a) is consistent with the inner diameter of the opening of the push rod cavity (1a).

3. The piriform fistula spreader of claim 1, wherein, The push rod lead-in pipe (1-2) and the suction lead-in pipe (1-3) are parallel to each other and extend into the fixed box (3); the length of the suction lead-in pipe (1-3) is less than that of the push rod lead-in pipe (1-2).

4. The piriform fistula spreader of claim 3, wherein, A push rod fixed plate (3-2) corresponding to the center of the push rod lead-in pipe (1-2) is arranged in the fixed box (3); a through hole matching the outer diameter of the push rod lead-in pipe (1-2) is arranged in the center of the push rod fixed plate (3-2); when the through pipe (1) is installed on the fixed box (3), the push rod lead-in pipe (1-2) extends into the through hole of the push rod fixed plate (3-2); A first sliding groove (3-3) and a second sliding groove (3-4) are sequentially arranged at the rear end of the push rod fixed plate (3-2) away from the push rod lead-in pipe (1-2); the second sliding groove (3-4) is coaxial with the push rod cavity (1a); A center hole (3a) is arranged in the center of the box body of the fixed box (3); a center shaft (8) penetrates the center hole (3a) to form a fixed rotation shaft in the cavity of the fixed box (3); a third sliding groove (3-5) is arranged on the shell of the fixed box (3) close to the gripping end of the movable handle (5); a fixed handle hole (3d) is further arranged on the shell of the fixed box (3) close to the starting end of the third sliding groove (3-5); A rotating-out hole (3b) is further arranged on the shell of the fixed box (3).

5. The piriform fistula spreader of claim 4, wherein, The box body of the fixed box (3) is divided into a bottom box (31) and a top box (32); the bottom box (31) and the top box (32) are detachably connected; A positioning groove (32a) is arranged on the upper end of the shell of the top box (32) close to the third sliding groove (3-5); the positioning groove (32a) is an arc-shaped groove as a whole, and the center of the arc coincides with the rotation center of the movable handle (5); the positioning groove (32a) has a normal direction sub-groove corresponding to the rotation angle of the movable handle (5) when the expansion end (2) is in different extended states.

6. The piriform fistula spreader of claim 5, wherein, A push plate (4-1) and a push plate sliding rod (4-2) are sequentially arranged at the connecting end of the push rod (4) away from the expansion end (2); When the push plate (4) slides in the push rod cavity (1a), the push rod (4) penetrates the push rod lead-in pipe (1-2) and the fixed plate (3-2); the push plate (4-1) is clamped in the first sliding groove (3-3) and slides along the center axis direction of the push rod cavity (1a); the push plate sliding rod (4-2) is clamped in the second sliding groove (3-4) and slides along the center axis direction of the push rod cavity (1a); A push plate sliding groove (4a) is arranged on the push plate (4-1) perpendicular to the sliding direction of the push rod (4); a rotating push rod (11) rotates and slides in the push plate sliding groove (4a).

7. The piriform fistula spreader of claim 6, wherein, The movable handle (5) extends into the cavity of the box body of the fixed box (3) through the third sliding groove (3-5) and rotates around the center shaft (8). The rotating end of the movable handle (5) inside the fixed box (3) is respectively provided with a rotating connecting rod (5-1), a rotating block (5-2) and a rotating connecting groove (5-3); The rotating block (5-2) is a flat cylinder, a through hole matched with the central shaft (8) is formed at the central shaft, the central shaft (8) penetrates the rotating block (5-2) and the fixed box (3); the central axes of the rotating connecting rod (5-1) and the rotating connecting groove (5-3) are collinear, and the rotating block (5-2) is symmetric with respect to the rotation center; A through hole matched with the outer diameter of the rotating push rod (11) is formed at the end point of the rotating connecting rod (5-1) away from the rotating block (5-2), the rotating push rod (11) penetrates the rotating connecting rod (5-1), rotates and slides in the push plate sliding groove (4a); a through groove is further formed in the rotating connecting rod (5-1); The rotating connecting groove (5-3) is provided with a positioning rod (5-4), the positioning rod (5-4) is consistent with the normal direction of the positioning groove (32a); a spring (9) and a positioning block (10) are respectively sleeved on the outer periphery of the positioning rod (5-4), the two ends of the spring (9) respectively abut against the inner wall of the rotating connecting groove (5-3) away from the third sliding groove (3-5) and the positioning block (10); the positioning block (10) penetrates the positioning groove (32a) and extends out of the top box (32) to form a protruding end.

8. The piriform fistula spreader of claim 4, wherein, A part of the pipe body of the suction pipe (7) penetrates the rotating hole (3b) and extends into the fixed box (3), and is in closed connection with the suction connecting pipe (1-3) of the through pipe (1).

9. The piriform fistula spreader of claim 5, wherein, The box body of the bottom box (31) is provided with a bottom box insertion hole (31a), the box body of the top box (32) is provided with a top box insertion column (32-1) matched with the bottom box insertion hole (31a), when the top box insertion column (32-1) is inserted into the bottom box insertion hole (31a), the relative position of the bottom box (31) and the top box (32) is fixed.

10. The piriform fistula spreader of claim 1, wherein, The through pipe (1) and the fixed box (3) are detachably connected through a screw (12).

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