Anorectal surgery stabbing device

Abstract

The invention discloses a puncture device for an anorectal surgery. The puncture device comprises a puncture needle, a fixed base disc, a rotary base disc, a plurality of expansion baffles and a clamping groove array. A plurality of radial linear rails are arranged in the fixed base disc; the rotary base disc is rotatably connected to the fixed base disc in a sleeved mode and provided with an opening and closing track. Each expansion baffle comprises a baffle arm part, a sliding part and a clamping and stopping sliding block; the arm blocking parts define an annular supporting structure capable of being opened and closed, and an instrument channel is formed in the center of the annular supporting structure. The sliding part is in sliding fit with the linear rail and the opening and closing rail at the same time, and rotary motion is converted into opening and closing of the blocking arm part. When the abutting force borne by the blocking arm part reaches a set value, the clamping sliding block is meshed with the clamping groove array on the inner wall of the linear rail, and self-locking is achieved. The device can automatically lock the opening degree of the expansion baffle according to the abutting force of anorectal tissue, so that the human tissue is effectively prevented from being damaged in the expansion process.

Description

Technical Field

[0001] This invention relates to the field of anorectal surgery technology, and more particularly to an anorectal surgery probe device. Background Technology

[0002] With the development of modern anorectal surgery techniques, clinicians have placed higher demands on the visualization and stable support of the anorectal region during surgery. In surgeries such as fistula exploration, hemorrhoid resection, and tumor biopsy, the extent of expansion needs to be dynamically adjusted according to tissue morphology and lesion depth to achieve adequate exposure and minimize damage to healthy tissue.

[0003] Traditional anal dilation instruments typically employ manual turning or gear-driven methods to adjust each dilation blade individually. This is cumbersome and makes it difficult to achieve synchronized and uniform opening and closing of multiple baffles. Especially in rapidly changing surgical field conditions, such as sudden intraoperative bleeding or the need for targeted exposure of deep tissues, existing devices cannot quickly and adaptively adjust the dilation angle and support force. This limitation in mechanical structure leads to insufficient surgical field exposure or excessive local pressure, potentially causing complications such as tissue edema or nerve damage. Therefore, there is an urgent need to develop an anal and rectal surgical probe device to address the technical problem of dilation baffles failing to adaptively lock according to tissue force during anal and rectal surgery, thus preventing excessive pressure or damage to human tissues. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a surgical probing device for anorectal surgery, which can automatically lock the opening degree of the expansion baffle according to the resistance force of the anorectal tissue, thereby effectively preventing damage to human tissue during the expansion process.

[0005] The objective of this invention is achieved through the following technical solution: A surgical probe device for anorectal procedures includes a puncture needle, a fixed base plate, a rotating base plate, multiple expansion baffles, and a slot array. The puncture needle is used to puncture anorectal tissue. A first direction is defined as the direction extending radially along the fixed base plate. The fixed base plate has multiple linear tracks extending along the first direction inside. The rotating base plate is rotatably fitted onto the fixed base plate, and has multiple opening and closing tracks corresponding to the linear tracks inside. Each expansion baffle includes a stop arm, a sliding part, and a locking slider. The multiple stop arms form an annular abutment structure for contacting and supporting the anorectal wall, with an instrument channel for the puncture needle to pass through its center. The sliding part is connected to the blocking arm and simultaneously slides and passes through the corresponding linear track and the corresponding opening and closing track, and is used to convert the coordinated movement of the linear track and the opening and closing track into the movement of the blocking arm moving closer to or away from the puncture needle; the locking slider is located on the sliding part at the end away from the blocking arm so as to follow the deflection of the blocking arm; the slot array is located on the inner wall of the linear track and extends along the first direction. When the resistance force on the blocking arm reaches the deflection threshold, the locking slider engages with the slot array under the linkage of the blocking arm and the sliding part to lock the expansion baffle.

[0006] Furthermore, the locking slider is a sheet-shaped locking block; the slot array is provided with an air-avoiding channel; the sliding part can slide through the air-avoiding channel; the sheet-shaped locking block is correspondingly arranged across the slot array on both sides of the air-avoiding channel.

[0007] Furthermore, each of the opening and closing tracks is an arc-shaped groove structure; multiple arc-shaped groove structures are distributed at intervals along the circumference of the rotating base disk, and the arc-shaped groove structures extend simultaneously along the circumference of the rotating base disk and the first direction.

[0008] Furthermore, the length of the straight track along the first direction is greater than the length of the opening and closing track along the first direction.

[0009] Furthermore, the expansion baffle also includes a spring mechanism, one end of which is connected to the stop arm and the other end of which is connected to the sliding part. The spring mechanism is used to provide an elastic preload to the stop arm.

[0010] Furthermore, the rotating base plate is provided with a spring preload adjustment ring; the spring preload adjustment ring is provided with an inner ring and a raised clearance hole; the sliding part is axially movable through the inner ring; the sliding part is provided with a plurality of radial protrusions distributed at intervals along its axial direction; the rotation diameter of the radial protrusions is larger than the diameter of the inner ring, and the plurality of radial protrusions can be driven by the sliding part to pass through the raised clearance hole; the sliding part is also provided with an adjustment knob, the adjustment knob is used to drive the sliding part to move axially and rotate circumferentially along the spring preload adjustment ring, so as to adjust the preload force of the spring mechanism.

[0011] Furthermore, the fixed base plate is provided with a positioning slot along its circumference; the rotating base plate is provided with a hinge shaft and a locking lever hinged to the hinge shaft; the locking lever drives the rotating base plate to rotate circumferentially along the hinge shaft; the locking lever can swing around the hinge shaft in a plane parallel to the rotating base plate; the locking lever can selectively engage with the positioning slot by swinging around the hinge shaft.

[0012] Furthermore, multiple limiting plates are provided in adjacent positioning slots; the locking lever is provided with limiting grooves corresponding to the size of the limiting plates; the limiting grooves can selectively engage any of the limiting plates.

[0013] Furthermore, the limiting plate is made of medical-grade silicone.

[0014] Furthermore, the expansion baffle also includes a perianal opening arc surface structure; the perianal opening arc surface structure is disposed on the baffle arm and corresponds to the perianal area of ​​the human body; the shape of the perianal opening arc surface structure is adapted to the perianal structure of the human body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A fixed base plate has multiple linear tracks extending along a first direction inside. The fixed base plate is rotatably connected to a rotating base plate. The rotating base plate has multiple sets of opening and closing tracks corresponding to the linear tracks, forming a basic support and transmission structure that can synchronously control the opening and closing movement of the expansion baffle. The baffle arms of the multiple expansion baffles form a ring-shaped abutment structure, with an instrument channel for the puncture needle in the center. The sliding parts are connected to the baffle arms and pass through both the linear tracks and the opening and closing tracks. The coordinated movement of the linear tracks and the opening and closing tracks is converted into the radial opening and closing movement of the baffle arms, achieving uniform expansion and stable support of the anorectal wall. A slot array extends along the inner wall of the linear tracks and is arranged parallel to the locking slider. When the abutment force on the baffle arm reaches a set deflection threshold, the locking slider swings along the first direction under the linkage of the baffle arm and the sliding part, and engages with the slot array, achieving adaptive mechanical locking of the expansion baffle position. This structure, through the integrated design of track-coordinated transmission and force feedback locking, achieves controllable adjustment of the expansion angle and adaptive locking for tissue protection during anorectal surgery.

[0016] 2. Based on the plate-shaped locking block and the slot array having a clearance channel, the sliding part can slide through it, achieving smooth displacement of the sliding part along the linear track. A fixing structure can also be fitted on the outside of the sliding part, allowing it to slide along the linear track and the opening / closing track without detaching from the overall structure axially. The plate-shaped locking block spans both sides of the clearance channel and is correspondingly positioned with the slot array, ensuring stable engagement of the plate-shaped locking block into the grooves of the slot array when the stop arm is subjected to a threshold abutment force, forming a reliable mechanical interlock. This plate-shaped, transverse layout enables the sliding part to move and enhances the anti-eccentric load capacity and meshing stability of the locking structure, ensuring that the expansion baffle can still lock under complex structural forces.

[0017] 3. Based on the fact that each opening and closing track is an arc-shaped groove structure, and multiple arc-shaped groove structures are distributed at intervals along the circumference of the rotating base disk, while the arc-shaped groove structures extend along the circumference of the rotating base disk and in the first direction, the rotation of the rotating base disk can be converted into the displacement of the sliding part in the first direction, thereby realizing the radial opening and closing motion of the stop arm. Since the length of the straight track in the first direction is greater than the length of the opening and closing track in the first direction, it provides a longer axial guiding stroke for the locking slider itself, while it occupies a certain space on the straight track in the first direction, thus improving the space utilization rate of the straight track and the opening and closing track. This structure, through the design of the opening and closing track and its cooperation with the straight track, achieves a smooth conversion from the rotational motion of the expansion baffle to the radial expansion motion.

[0018] 4. The expansion baffle also includes a spring mechanism, with both ends of the spring mechanism connected to the baffle arm and the sliding part, respectively. This provides a continuous elastic preload to the baffle arm, enabling it to adaptively conform to the anorectal wall tissue and buffer local pressure. A spring preload adjustment ring is provided on the rotating base. Its inner ring and raised clearance holes cooperate with multiple axially spaced radial protrusions on the sliding part. The rotation diameter of the radial protrusions is larger than the inner ring diameter. By operating the adjustment knob, the sliding part can move axially and rotate circumferentially, allowing multiple radial protrusions to pass through the raised clearance holes. When the baffle arm is compressed by the inner wall of the human tissue, this force is transmitted to the spring mechanism through the force application points on both sides of the spring, manifesting as spring deformation. The tighter the spring preload (i.e., the lower the height), the greater its stiffness, making it less prone to bending deformation and only causing the locking slider to swing with a small amplitude. Conversely, the looser the spring preload (the higher the height), the easier it is to deform, causing the locking slider to swing with a larger amplitude. By adjusting the pull knob to change the spring's preload height, multiple levels of adjustment can be achieved for the spring preload and the overall stiffness of the mechanism. This elastic preload and adjustable structure enhances the adaptability of the expansion baffle to tissue deformation, allowing operators to flexibly set and match the support force of the expansion baffle according to clinical needs and physiological differences in different parts of the body, thereby meeting the threshold requirements of tension in various tissues.

[0019] 5. The fixed base plate has a positioning slot along its circumference, and the rotating base plate has a locking lever with a hinge shaft. By swinging the lever, it can engage with the corresponding position in the positioning slot, thus positioning and fixing the rotation angle of the rotating base plate. Multiple limiting plates (which can be made of flexible materials such as medical-grade silicone) are provided within the positioning slot, and the locking lever has correspondingly sized limiting grooves. The engagement of the grooves with the limiting plates enhances the selectivity of rotation positioning. The expansion baffle also features a perianal opening arc structure, whose shape is adapted to and correspondingly set to the human perianal structure, achieving gentle opening and effective protection of the perianal tissue. This structure, through the comprehensive design of angle positioning, enhanced limiting, surface adaptation, and flexible materials, significantly improves operational convenience and positioning reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a proctology surgical probe according to the present invention; Figure 2 for Figure 1 A structural schematic diagram from another perspective is shown; Figure 3 for Figure 1 A cross-sectional view from another perspective is shown; Figure 4 for Figure 3 A magnified view of point A shown below; Figure 5 This is a schematic diagram of the rotating base disk.

[0021] In the diagram: 1. Fixed base plate; 2. Linear track; 3. Rotating base plate; 4. Opening and closing track; 5. Expansion baffle; 501. Stop arm; 502. Sliding part; 503. Locking slider; 504. Spring mechanism; 505. Radial protrusion; 506. Adjusting knob; 6. Slot array; 7. Clearance channel; 8. Spring preload adjustment ring; 801. Inner ring; 802. Protruding clearance hole; 9. Positioning slot; 10. Hinge shaft; 11. Locking lever; 12. Limiting plate; 13. Limiting groove; 14. Perianal opening arc surface structure; 15. Puncture needle. Detailed Implementation

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be 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.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] See Figures 1-5 A preferred embodiment of the present invention is described below: A surgical probe for anorectal procedures includes a puncture needle 15, a fixed base plate 1, a rotating base plate 3, multiple expansion baffles 5, and a slot array 6. The puncture needle 15 is used to puncture anorectal tissue. A first direction is defined as the direction extending radially along the fixed base plate 1. The fixed base plate 1 has multiple linear tracks 2 extending along the first direction inside. The rotating base plate 3 is rotatably fitted onto the fixed base plate 1, and the rotating base plate 3 has multiple opening and closing tracks 4 corresponding to the linear tracks 2 inside. Each expansion baffle 5 includes a stop arm 501, a sliding part 502, and a locking slider 503. The multiple stop arms 501 enclose a ring-shaped abutment structure for contacting and supporting the anorectal wall, with an instrument channel for the puncture needle 15 to pass through in the center. Part 502 is connected to the stop arm part 501 and simultaneously slides and passes through the corresponding linear track 2 and the corresponding opening and closing track 4, used to convert the coordinated movement of the linear track 2 and the opening and closing track 4 into the movement of the stop arm part 501 moving closer to or away from the puncture needle (15); the locking slider 503 is provided on the end of the sliding part 502 away from the stop arm part 501 so as to follow the deflection of the stop arm part 501; the slot array 6 is provided on the inner wall of the linear track 2 and extends along the first direction and is arranged parallel to the locking slider 503. When the resistance force on the stop arm part 501 reaches the deflection threshold, the locking slider 503 engages with the slot array 6 under the linkage of the stop arm part 501 and the sliding part 502 to lock the expansion baffle 5. The core function of this invention is to realize the expansion of the surgical field and the adaptive locking of tissue in anorectal surgery, effectively protecting sensitive tissues.

[0026] The device mainly consists of a fixed base plate 1, a rotating base plate 3, multiple expansion baffles 5, and a slot array 6. The fixed base plate 1 has multiple linear tracks 2 extending radially (in the first direction) inside. The rotating base plate 3 is rotatably mounted on the fixed base plate 1 by means of bearing sleeves, shaft hole clearance fits, or hinge pins, and has multiple opening and closing tracks 4 inside. Each expansion baffle 5 includes a stop arm 501, a sliding part 502, and a locking slider 503. Multiple stop arms 501 together form an annular abutment structure, with an instrument channel for the puncture needle 15 to pass through in the center. The sliding part 502 passes through and slides in cooperation with the linear tracks 2 and the opening and closing tracks 4. The locking slider 503 is installed at the distal end of the sliding part 502. The slot array 6 is located on the inner wall of the linear track 2, extends in the first direction, and is arranged parallel to the locking slider 503.

[0027] The operator rotates the rotating base plate 3, and through the relative movement of its internal opening and closing track 4 and the linear track 2 on the fixed base plate 1, drives each sliding part 502 to move along the first direction, thereby causing all the blocking arms 501 to perform radial opening and closing movements synchronously. When the blocking arm 501 contacts and supports the anal wall, and the contact force reaches a preset threshold, the force is transmitted to the sliding part 502 through the deformation of the blocking arm 501, forcing the locking slider 503 to produce radial displacement and lock into the corresponding groove of the slot array 6, forming a mechanical interlock, thereby stopping the sliding part 502 from continuing to advance along the linear track, realizing the automatic locking of the position of the expansion baffle 5, and preventing over-expansion from causing tissue damage.

[0028] It is understood that, based on the fact that the fixed base plate 1 has multiple linear tracks 2 extending along the first direction inside, the fixed base plate 1 and the rotating base plate 3 are rotatably connected, and the rotating base plate 3 has multiple sets of opening and closing tracks 4 corresponding to the linear tracks 2 inside, forming a basic support and transmission structure that can synchronously control the opening and closing movement of the expansion baffle 5; the baffle arm portions 501 of the multiple expansion baffles 5 form an annular abutment structure, and an instrument channel for the puncture needle 15 to pass through is formed in the center. The sliding portion 502 is connected to the baffle arm portion 501 and passes through the linear tracks 2 and the opening and closing tracks 4, and the movement of the linear tracks 2 and the opening and closing tracks 4 is transformed into a blocking motion. The radial opening and closing motion of the arm 501 achieves uniform expansion and stable support of the anorectal wall. A fixing structure can also be fitted onto the outside of the sliding part 502, allowing the sliding part 502 to slide along the linear track and the opening / closing track without detaching from the overall structure along its axial direction. Based on the slot array 6 extending along the inner wall of the linear track 2 and arranged parallel to the locking slider 503, when the resistance force on the arm 501 reaches a set threshold, the locking slider 503 swings in the first direction under the linkage of the arm 501 and the sliding part 502, engaging with the slot array 6 to achieve adaptive mechanical locking of the expansion baffle 5 position. This structure, through the integrated design of track-coordinated transmission and force feedback locking, achieves controllable adjustment of the expansion angle and adaptive locking for tissue protection during anorectal surgery.

[0029] In use, the operator first rotates the rotating base plate 3 to align the minimum diameter position of the opening and closing track 4 with the straight track 2. At this time, the sliding part 502 is located at the closest end of the movement trajectory, causing the annular abutment structure of multiple expansion baffles 5 to contract to the minimum diameter state. Then, the device is placed into the target area of ​​the anorectal region. By continuing to rotate the rotating base plate 3, the opening and closing track 4 and the straight track 2 are driven to generate relative movement, pushing the sliding part 502 to gradually move further away, thereby controlling the expansion baffles 5 to gradually expand the tissue. When the contact force between the baffle arm 501 and the intestinal wall reaches a preset threshold, the locking slider 503 automatically engages with the slot array 6 under the linkage action, realizing the locking of the expansion diameter. In addition, positioning structures such as positioning slots 9 and locking levers 11 can be added. During the operation, the locking lever 11 can be engaged with the positioning slot 9 to fix the rotating base plate 3 relative to the fixed base plate 1, thereby maintaining the current diameter of the expansion baffles 5. The puncture needle 15 is inserted through the instrument channel and the surgery is performed using the puncture needle 15. After completion, remove the puncture needle 15, release the locking lever 11, and rotate the rotating base 3 in the opposite direction. The relative movement between the opening and closing track 4 and the linear track 2 drives the sliding part 502 to move in the opposite direction in the first direction, causing the locking slider 503 to disengage from the slot array 6 and restore its parallel and unlocked state with the slot array 6. Continue to rotate the rotating base 3 in the opposite direction until the annular abutment structure formed by each expansion baffle 5 shrinks to its minimum diameter, at which point the device can be safely removed.

[0030] Preferably, the locking slider 503 is a sheet-like locking block; the slot array 6 is provided with a clearance channel 7; the sliding part 502 can slide through the clearance channel 7; the sheet-like locking block is correspondingly arranged across the slot array 6 on both sides of the clearance channel 7. The core function of this structure is to achieve integrated control of the movement of the sliding part 502 and the locking of the expansion baffle 5.

[0031] The plate-shaped locking block is fixed at the far end of the sliding part 502, and its width direction spans across the top of the clearance channel 7; the slot array 6 is distributed on both sides of the inner wall of the straight track 2, forming a continuously arranged tooth-shaped structure; the clearance channel 7 is a through groove extending along the axial direction of the straight track 2, through which the sliding part 502 passes and can slide along the channel; the bottom of the plate-shaped locking block and the tooth groove of the slot array 6 maintain a parallel alignment relationship.

[0032] During the expansion process, the sliding part 502 drives the plate-shaped locking block to move along the length of the clearance channel 7. At this time, the plate-shaped locking block remains separated from the slot. When the stop arm part 501 is subjected to a radial threshold abutment force, it forces the sliding part 502 connected to the plate-shaped locking block to undergo radial deformation or deflection, causing the plate-shaped locking block to swing and embed into the corresponding tooth groove as the sliding part 502 deforms. The two sides of the plate-shaped locking block simultaneously engage with the double-sided slot array 6 to form a symmetrical constraint, thereby resisting off-center load and realizing bidirectional mechanical interlocking.

[0033] It is understandable that, based on the fact that the locking slider 503 is a sheet-like locking block and the slot array 6 has a clearance channel 7, the sliding part 502 can slide through it, realizing the smooth displacement of the sliding part 502 along the linear track 2; based on the structure of the sheet-like locking block spanning both sides of the clearance channel 7 and correspondingly arranged with the slot array 6, the sheet-like locking block can stably lock into the tooth groove of the slot array 6 when the stop arm part 501 is subjected to a threshold abutment force, forming a reliable mechanical interlock. This sheet-like spanning layout realizes the mobility of the sliding part 502 and enhances the anti-eccentric load capacity and meshing stability of the locking structure, ensuring that the expansion baffle 5 can still achieve locking under the action of complex organizational forces.

[0034] Preferably, each opening and closing track 4 is an arc-shaped groove structure; multiple arc-shaped groove structures are distributed at intervals along the circumference of the rotating base disk 3, and the arc-shaped groove structures extend simultaneously along the circumference and the first direction of the rotating base disk 3. The core function of this structure is to convert the circumferential rotation of the rotating base disk 3 into the radial opening and closing motion of the expansion baffle 5.

[0035] The arc-shaped groove structure is machined with a specific curvature inside the rotating base plate 3. Multiple grooves are arranged evenly or at intervals around the circumference. Each arc-shaped groove structure has a dimensional change in the first direction while extending in the circumference, and its overall shape presents a three-dimensional curve shape in space. The sliding part 502 passes through the arc-shaped groove structure and guides its movement trajectory through the groove wall.

[0036] When the rotating base disk 3 rotates, the circumferential part of the arc groove structure drives the sliding part 502 to follow circumferentially, while its extension dimension in the first direction forces the sliding part 502 to generate axial displacement at the same time; this axial displacement is transmitted to the stop arm part 501 through the sliding part 502, and is directly converted into the radial opening or contraction movement of the stop arm part 501, thereby realizing the function of controlling the expansion diameter through rotation.

[0037] It can be understood that, based on the fact that each opening and closing track 4 is an arc-shaped groove structure, and multiple arc-shaped groove structures are distributed at intervals along the circumference of the rotating base disk 3, and the arc-shaped groove structures extend along the circumference of the rotating base disk 3 and the first direction, the rotation of the rotating base disk 3 can be converted into the displacement of the sliding part 502 along the first direction, thereby realizing the radial opening and closing motion of the stop arm part 501.

[0038] Preferably, the length of the linear track 2 along the first direction is greater than the length of the opening and closing track 4 along the first direction. The core function of this structure is to provide stroke guidance for the sliding part 502 and to provide clearance for the locking slider 503, thereby realizing the smooth transformation of the rotational motion of the sliding part 502 into radial expansion motion.

[0039] It is understandable that, since the length of the linear track 2 along the first direction is greater than the length of the opening and closing track 4 along the first direction, it provides a longer axial guiding stroke and clearance space for the locking slider 503, while the locking slider 503 itself occupies a certain space on the linear track 2 along the first direction, thereby improving the space utilization rate of the linear track 2 and the opening and closing track 4. Through the design of the opening and closing track 4 and its cooperation with the linear track 2, this structure achieves a smooth transition from the rotational motion of the sliding part 502 to the radial expansion motion.

[0040] When the sliding part 502 moves under the drive of the opening and closing track 4, it is always radially constrained by the straight track 2; especially in the stage beyond the stroke of the opening and closing track 4, the part of the straight track 2 that exceeds the stroke continues to provide guidance for the sliding part 502, preventing deviation or jamming, thereby ensuring the smoothness and reliability of the opening and closing movement of the stop arm part 501.

[0041] Preferably, the expansion baffle 5 further includes a spring mechanism 504, one end of which is connected to the baffle arm 501, and the other end is connected to the sliding part 502. The spring mechanism 504 is used to provide elastic pre-tightening force to the baffle arm 501. The core function of this structure is to enable the baffle arm 501 to obtain elastic buffering capacity, so as to achieve flexible fit and pressure self-adaptation with the anorectal wall.

[0042] The spring mechanism 504 is connected between the stop arm 501 and the sliding part 502 to form an elastic intermediate part; its installation position and direction match the force direction of the stop arm 501 to ensure that the preload is effectively transmitted to the contact surface.

[0043] When the arm 501 contacts the tissue and is subjected to radial pressure, the spring mechanism 504 is compressed or stretched, absorbing part of the pressure and providing feedback force through deformation. This mechanism allows the arm 501 to finely adjust its support posture according to the tissue shape, avoiding excessive local pressure while maintaining a stable support effect.

[0044] It is understood that the expansion baffle 5 also includes a spring mechanism 504, and the two ends of the spring mechanism 504 are respectively connected to the baffle arm 501 and the sliding part 502, providing a continuous elastic pre-tightening force to the baffle arm 501, so that it can adaptively conform to the anorectal wall tissue and buffer local pressure.

[0045] Preferably, the rotating base plate 3 is provided with a spring preload adjustment ring 8; the spring preload adjustment ring 8 is provided with an inner ring 801 and a raised clearance hole 802; the sliding part 502 is axially movable through the inner ring 801; the sliding part 502 is provided with a plurality of radial protrusions 505 distributed at intervals along its axial direction; the rotation diameter of the radial protrusions 505 is larger than the diameter of the inner ring 801, and the plurality of radial protrusions 505 can be driven by the sliding part 502 to pass through the raised clearance hole 802; the sliding part 502 is also provided with an adjustment knob 506, which is used to drive the sliding part 502 to move axially and rotate circumferentially along the spring preload adjustment ring 8 to adjust the preload force of the spring mechanism 504. The core function of this structure is to realize multi-level adjustment of the preload force of the spring mechanism 504 to adapt to the support force requirements of different tissues.

[0046] The spring preload adjusting ring 8 is fixed to the rotating base plate 3, and its inner ring 801 provides axial movement guidance for the sliding part 502; multiple radial protrusions 505 are distributed axially along the sliding part 502, and the protrusion clearance hole 802 is located on the spring preload adjusting ring 8 and corresponds to the position of the radial protrusions 505; the adjusting knob 506 is connected to the sliding part 502 and is used to apply a combined motion of axial movement and circumferential rotation, so that the target radial protrusion 505 passes through the protrusion clearance hole 802 and abuts against the side of the spring preload adjusting ring 8 away from the spring mechanism 504.

[0047] The operator operates the adjustment knob 506, which drives the sliding part 502 to move axially and rotate circumferentially. When a specific radial protrusion 505 is aligned with the protrusion clearance hole 802, the sliding part 502 can continue to move axially so that the protrusion passes into the hole. When the radial protrusions 505 at different axial positions pass into the hole, the initial compression of the spring mechanism 504 will be changed, thereby realizing the graded adjustment of the preload.

[0048] It is understandable that, based on the rotating base plate 3, a spring preload adjustment ring 8 is provided. Its inner ring 801 and raised clearance hole 802 cooperate with multiple radially spaced radial protrusions 505 on the sliding part 502. The rotation diameter of the radial protrusions 505 is larger than the diameter of the inner ring 801. By operating the adjustment knob 506, the sliding part 502 is driven to move axially and rotate circumferentially, so that multiple radial protrusions 505 can pass into the raised clearance hole 802. When the stop arm part 501 is squeezed by the inner wall of human tissue, the force will be transmitted to the spring mechanism 504 through the force application points on both sides of the spring and will be concentrated as the deformation of the spring. The tighter the spring preload (i.e., the lower the height), the greater its stiffness, and the less likely it is to bend and deform. It can only drive the locking slider 503 to produce a small amplitude of swing. Conversely, the looser the spring preload (the higher the height), the easier it is to deform and drive the locking slider 503 to produce a larger amplitude of swing. By adjusting the pull button 506 to change the preload height of the spring, multiple levels of adjustment can be achieved for the spring preload and the overall stiffness of the mechanism. This elastic preload and adjustable structure enhances the adaptability of the expansion baffle 5 to tissue deformation, allowing the operator to flexibly set and match the support force of the expansion baffle 5 according to clinical operation needs and physiological differences in different parts of the body, thereby meeting the threshold requirements of tension for various tissues.

[0049] Furthermore, the locking slider 503 can be fixedly connected to the sliding part 502 (i.e., an integral structure) or rotatably slidably connected. If a fixed connection is used, the maximum outer diameter of the locking slider 503 should be smaller than the width of the linear track 2, while its minimum outer diameter should be larger than the width of the clearance channel 7. This dimensional design ensures that when the sliding part 502 drives the locking slider 503 to rotate, the locking slider 503 can slide smoothly on the linear track 2 and accurately bridging the slot array 6 on both sides of the clearance channel 7.

[0050] Preferably, the fixed base plate 1 is provided with a positioning slot 9 along the circumference; the rotating base plate 3 is provided with a hinge shaft 10 and a locking lever 11 hinged to the hinge shaft 10; the locking lever 11 drives the rotating base plate 3 to rotate circumferentially around the rotating base plate 3 through the hinge shaft 10; the locking lever 11 can swing around the hinge shaft 10 in a plane parallel to the rotating base plate 3; the locking lever 11 can be engaged into the positioning slot 9 by swinging through the hinge shaft 10. The core function of this structure is to realize the positioning and fixing of the rotation angle of the rotating base plate 3.

[0051] The positioning slot 9 is set on the edge of the fixed base plate 1 along the circumference of the fixed base plate 1; the locking lever 11 is installed on the rotating base plate 3 through the hinge shaft 10, and can swing in a plane parallel to the rotating base plate 3 through the hinge shaft 10; the shape of the front end of the lever matches the positioning slot 9.

[0052] The operator swings the locking lever 11 to disengage it from the current slot, allowing the rotating base plate 3 to rotate freely. When the target angle is reached, the lever is re-engaged into the positioning slot 9, and the rotation of the rotating base plate 3 is restricted by mechanical interlocking, thereby fixing the expansion angle.

[0053] Preferably, the positioning slot 9 is provided with multiple limiting plates 12; the locking lever 11 is provided with limiting grooves 13 corresponding to the size of the limiting plates 12; the limiting grooves 13 can selectively engage with any of the limiting plates 12. The limiting plates 12 can be made of flexible structures such as medical silicone. The core function of this structure is to compensate for alignment deviations during assembly and operation by deforming the limiting plates 12, thereby expanding the effective insertion range of the locking lever 11 and achieving more stable additional locking in the circumferential direction.

[0054] The limiting plate 12 is set in the positioning slot 9, and its material has a certain elastic deformation ability; the size of the limiting groove 13 on the locking lever 11 matches the size of the limiting plate 12 in the free state.

[0055] When the locking lever 11 swings and attempts to engage, even if the limiting groove 13 and the positioning slot 9 are not fully aligned, the flexible limiting plate 12 can still undergo elastic deformation after contacting the limiting groove 13, thereby guiding and allowing the lever to continue moving until it is fully engaged in the predetermined position. During this process, the deformed limiting plate 12 tightly fills the limiting groove 13 with its own restoring force, generating additional circumferential frictional resistance and enhancing the overall stability of the lock.

[0056] Preferably, the limiting plate 12 is made of medical-grade silicone. The core function of this structure is to use the elastic deformation of silicone to compensate for alignment deviations, expand the effective insertion range of the locking lever 11, and provide a flexible additional locking force in the circumferential direction.

[0057] The medical silicone limiting plate 12 is set on the fixed base plate 1 between the positioning slots 9. Its shape is adapted to the limiting groove 13 on the locking lever 11. The silicone material has certain softness and elastic recovery characteristics.

[0058] When the locking lever 11 swings and engages, even if there is a misalignment, the silicone limiting plate 12 can guide the limiting groove 13 to slide into the predetermined position through elastic deformation. During the deformation process, the restoring force generated by the silicone continuously fills the limiting groove 13, forming a flexible circumferential constraint, thereby enhancing the locking stability and reducing rigid impact.

[0059] Preferably, the expansion baffle 5 further includes a perianal spreading arc surface structure 14; the perianal spreading arc surface structure 14 is disposed on the baffle arm 501 and corresponds to the perianal area of ​​the human body; the shape of the perianal spreading arc surface structure 14 is adapted to the perianal structure of the human body. The core function of this structure is to achieve gentle spreading and effective protection of the perianal tissue through the contoured arc surface.

[0060] The perianal expansion arc structure 14 is located on the proximal outer side of the baffle 501, and its contour matches the natural shape of the human perianal area. The arc surface adopts a smooth transition design to avoid sharp edges or corners. When the expansion baffle 5 expands radially, the arc structure moves outward accordingly, gradually expanding the perianal tissue in an ergonomic curved manner. Its adaptive shape can disperse local pressure and reduce the risk of tissue damage.

[0061] In summary, based on the track-coordinated structure of the fixed base plate 1 and the rotating base plate 3, this device converts rotational motion into radial opening and closing of multiple expansion baffles 5 through the cooperation of the linear track 2 and the opening and closing track 4, achieving uniform expansion of the anal wall. The baffle arm 501 is connected to the sliding part 502, which passes through both types of tracks. When the contact force reaches a set threshold, the locking slider 503 engages with the slot array 6 to achieve mechanical self-locking. The arc-shaped opening and closing track 4 is circumferentially distributed, converting rotational motion into axial displacement. The spring mechanism 504 provides preload to the baffle arm 501, which can be adjusted in multiple positions via the adjusting ring. The rotating base plate 3 is equipped with a locking lever 11, which can cooperate with the positioning slot 9 of the fixed base plate 1 to achieve angle fixation. The ends of the expansion baffles 5 are adapted to the anal circumference to achieve gentle opening and protection. This structure integrates track transmission, force feedback locking, elastic adjustment, and ergonomic design, improving the adaptability and operational stability of surgical expansion.

[0062] This invention provides a surgical probe device for anorectal procedures, with a structure similar to a cannula. The device consists of two parts: a cannula structure with opening and closing capabilities, and a needle body structure. The cannula structure includes an external fixed base plate (1), a rotatable rotating base plate (3), multiple deployable expansion baffles (5), and a positioning slot array (6). The needle body structure is composed of a puncture needle (15). Together, they achieve the overall function of the cannula. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A surgical probe for anorectal procedures, characterized in that, include: A puncture needle (15) is used to puncture the anorectal tissue; A fixed base plate (1) is defined as having a first direction that extends radially along the fixed base plate (1); the fixed base plate (1) is provided with a plurality of straight tracks (2) extending along the first direction inside. A rotating base plate (3) is rotatably fitted onto the fixed base plate (1). The interior of the rotating base plate (3) is provided with multiple opening and closing tracks (4) corresponding to the linear track (2). Multiple expansion baffles (5), each expansion baffle (5) includes a baffle arm (501), a sliding part (502), and a locking slider (503); the multiple baffle arms (501) enclose to form an annular abutment structure for contacting and supporting the anorectal wall, with an instrument channel formed in the center for the puncture needle (15) to pass through; the sliding part (502) is connected to the baffle arm (501) and simultaneously slides and is disposed on the corresponding linear track (2) and the corresponding opening and closing track (4), and is used to convert the coordinated movement of the linear track (2) and the opening and closing track (4) into the movement of the baffle arm (501) moving closer to or away from the puncture needle (15); the locking slider (503) is disposed on the sliding part (502) at one end away from the baffle arm (501) so as to follow the swing of the baffle arm (501); The slot array (6) is located on the inner wall of the linear track (2) and extends along the first direction. When the resistance force on the stop arm (501) reaches the deflection threshold, the locking slider (503) engages with the slot array (6) under the linkage of the stop arm (501) and the sliding part (502) to lock the expansion baffle (5).

2. The surgical probe device for anorectal procedures according to claim 1, characterized in that, The locking slider (503) is a sheet-shaped locking block; the slot array (6) is provided with an air-avoiding channel (7); the sliding part (502) can slide through the air-avoiding channel (7); the sheet-shaped locking block spans the air-avoiding channel (7) and is correspondingly arranged with the slot array (6) on both sides of the air-avoiding channel (7).

3. The surgical probe device for anorectal procedures according to claim 1, characterized in that, Each of the opening and closing tracks (4) is an arc-shaped groove structure; multiple arc-shaped groove structures are distributed circumferentially along the rotating base disk (3), and the arc-shaped groove structures extend simultaneously along the circumferential direction and the first direction of the rotating base disk (3).

4. The surgical probe device for anorectal procedures according to claim 1, characterized in that, The length of the straight track (2) along the first direction is greater than the length of the opening and closing track (4) along the first direction.

5. The surgical probe device for anorectal procedures according to claim 1, characterized in that, The expansion baffle (5) also includes a spring mechanism (504), one end of which is connected to the stop arm (501) and the other end is connected to the sliding part (502). The spring mechanism (504) is used to provide elastic preload to the stop arm (501).

6. The surgical probe device for anorectal procedures according to claim 5, characterized in that, The rotating base plate (3) is provided with a spring preload adjustment ring (8); the spring preload adjustment ring (8) is provided with an inner ring (801) and a raised clearance hole (802); the sliding part (502) is axially movable through the inner ring (801); the sliding part (502) is provided with a plurality of radial protrusions (505) spaced apart along its axial direction; the rotation diameter of the radial protrusions (505) is larger than the diameter of the inner ring (801), and the plurality of radial protrusions (505) can be driven by the sliding part (502) to pass through the raised clearance hole (802); the sliding part (502) is also provided with an adjustment knob (506), the adjustment knob (506) is used to drive the sliding part (502) to move axially and rotate circumferentially along the spring preload adjustment ring (8) to adjust the preload force of the spring mechanism (504).

7. The surgical probe device for anorectal procedures according to claim 1, characterized in that, The fixed base plate (1) has a positioning slot (9) arranged around its circumference; the rotating base plate (3) is provided with a hinge shaft (10) and a locking lever (11) hinged to the hinge shaft (10); the locking lever (11) drives the rotating base plate (3) to rotate around the circumference of the rotating base plate (3) through the hinge shaft (10); the locking lever (11) can swing around the hinge shaft (10) in a plane parallel to the rotating base plate (3); the locking lever (11) can selectively engage in the positioning slot (9) by swinging through the hinge shaft (10).

8. The surgical probe device for anorectal procedures according to claim 7, characterized in that, Multiple limiting plates (12) are provided in adjacent positioning slots (9); the locking lever (11) is provided with a limiting groove (13) corresponding to the size of the limiting plate (12); the limiting groove (13) can selectively engage any of the limiting plates (12).

9. The surgical probe device for anorectal procedures according to claim 8, characterized in that, The limiting plate (12) is made of medical-grade silicone.

10. The surgical probe device for anorectal procedures according to claim 1, characterized in that, The expansion baffle (5) also includes an anal opening arc surface structure (14); the anal opening arc surface structure (14) is provided on the baffle arm (501) and is provided corresponding to the human anal area; the shape of the anal opening arc surface structure (14) is adapted to the human anal structure.

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