Adjustable prostate puncture surgery ultrasonic probe depth limiting device

Abstract

The invention discloses an adjustable prostate puncture surgery ultrasonic probe depth limiting device, which relates to the technical field of medical instruments, and comprises an ultrasonic probe, a support frame, a depth adjusting and locking assembly assembled on the support frame, an elastic bayonet convexly arranged at the front end of the support frame, and a limiting separation blade detachably and movably connected with the elastic bayonet, the elastic clamping opening and the limiting blocking piece are movably matched with the clamping gap through the annular boss, and the U-shaped bent structure on the rear portion of the elastic clamping opening has good elastic deformation capacity and can be matched with multi-direction movement of the annular boss; meanwhile, the arc-shaped peripheral wall of the annular boss is matched with the outline of the inner side of the clamping opening, the thickness of the annular boss is precisely matched with the width of the clamping gap, sufficient allowance is reserved for pitching, swinging and rotating adjustment, and an operator can freely adjust the angle of the ultrasonic probe to complete axial rotating scanning and multi-directional probing through cooperation; the angle adjusting action does not interfere with the depth locking state, and the defect that a simple limiting tool restrains probe operation is overcome.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustable ultrasound probe depth limiting device for prostate biopsy. Background Technology

[0002] Ultrasound-guided prostate biopsy is a crucial clinical diagnostic tool for prostate lesions. During the procedure, the operator inserts an ultrasound probe into the patient's rectum via the anus and uses axial rotation to scan and locate the target area of ​​the prostate. Once a satisfactory puncture depth and scanning angle are determined, subsequent procedures, such as the stimulation sampling needle, are performed. Throughout this process, depth stability and probe manipulation flexibility are essential for ensuring puncture accuracy. Maintaining the predetermined probe insertion depth while allowing for probe rotation and oscillation is crucial to ensure the sampling needle accurately hits the target site.

[0003] Chinese Patent CN107049370B discloses a prostate biopsy kit, including a biopsy kit, an electromagnetic positioning device, and an information processing unit. The biopsy kit has an outer sheath, a biopsy needle embedded in the outer sheath, and a flexible tube. A first position sensor is connected to the outer edge of the tail end of the outer sheath. The biopsy needle has a handle tail end for the operator to hold and a remote front end for contacting the examination site. A contact force sensor, a transmitter, a receiver, and an ultrasound transducer are located at the remote front end, and a second position sensor is located on the rear side of the remote front end. By using multimodal medical image registration and fusion technology, combining the diagnostic advantages of preoperative MRI images with the real-time guidance advantages of TRUS images, it provides higher quality targeted guidance biopsy.

[0004] Currently, clinical procedures lack specialized auxiliary devices to meet this need, and surgeons often rely on hand grip strength to maintain probe depth. However, during actions such as activating the sampling needle and adjusting the puncture angle, the force applied to the hand can easily cause slight deviations, altering the probe's insertion depth into the rectum and leading to scanning positioning failure. This necessitates readjusting the depth and angle, prolonging the procedure and potentially increasing patient discomfort due to repeated manipulation. While some simple positioning tools used in clinical practice can limit depth to some extent, their rigid design significantly restricts the probe's rotation and swinging movements, failing to meet the surgeon's scanning needs for different areas and thus having poor practicality.

[0005] To address these issues, this invention proposes an adjustable ultrasound probe depth limiting device for prostate biopsy. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present invention is proposed.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an adjustable ultrasound probe depth limiting device for prostate biopsy, comprising an ultrasound probe, and further comprising: Support frame; A depth adjustment locking assembly is mounted on the support frame. The ultrasonic probe is mounted and confined on the depth adjustment locking assembly and moves axially along the support frame with the depth adjustment locking assembly to adjust the insertion depth of the ultrasonic probe. An elastic latch protrudes from the front end of the support frame. The elastic latch is integrally formed with the support frame. The elastic latch includes an upper lobe and a lower lobe that are arranged opposite each other. A clamping gap is formed between the upper lobe and the lower lobe. The rear part of the clamping gap is provided with a U-shaped bend structure that is recessed towards the support frame. A limiting stop is detachably and movably connected to the elastic bayonet. The limiting stop has an annular protrusion extending along its edge. The annular protrusion is adapted to the clamping gap of the elastic bayonet, so that the elastic bayonet is clamped on the outer periphery of the annular protrusion to form a relatively movable mating structure.

[0008] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the end of the upper flap away from the support frame is provided as a pointed structure and is curved towards the side closer to the lower flap; The lower lobe is designed with an arc-shaped bend towards the side closer to the upper lobe at one end away from the support frame, and the middle section of the lower lobe protrudes towards the side closer to the upper lobe to form a U-shaped groove. The distal end of the upper lobe and the distal end of the lower lobe together form a locking opening for engaging the annular boss.

[0009] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the outer peripheral wall of the annular boss is set as an arc-shaped curved surface adapted to the inner contour of the clamping opening, and the thickness of the annular boss is adapted to the width of the clamping gap.

[0010] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: both ends of the annular boss are provided with anti-dislodgement terminals, and the anti-dislodgement terminals are used to abut against the outer wall of the elastic bayonet for limiting. The inner diameter of the engagement joint is smaller than the outer diameter of the annular boss.

[0011] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the depth adjustment locking component includes a probe fixing seat, the probe fixing seat has a through hole in the middle along the axial direction for the support frame to pass through and slide, the two ends of the through hole have symmetrical guide grooves communicating with the through hole, the guide grooves extend along the axial direction, and the inner contour of the probe fixing seat is adapted to the support frame; The probe holder has an inverted U-shaped snap-fit ​​frame integrally formed on both sides. The bottom surface of the probe holder is provided with a symmetrical arc-shaped snap-fit ​​frame. The inner side wall of the arc-shaped snap-fit ​​frame is provided with anti-slip ridges. The arc-shaped snap-fit ​​frame is used to clamp and position the ultrasonic probe.

[0012] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the probe fixing seat is provided with transverse sliding grooves on both sides above the through-hole, the through-hole sidewall of the probe fixing seat is integrally formed with an elastic meshing arm, the elastic meshing arm is inclined toward the inside of the through-hole, and its free end is provided with a circular meshing tooth, and a limiting contact ball is provided on the side of the probe fixing seat away from the free end of the elastic meshing arm.

[0013] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, the depth adjustment locking assembly further includes a sliding locking seat that engages with the probe fixing seat. The sliding locking seat has a symmetrical frame structure with locking wings on both sides that are adapted to the inverted U-shaped fastening frame of the probe fixing seat. The bottom of the sliding locking seat is integrally formed with a driving protrusion that is adapted to the transverse sliding groove of the probe fixing seat. When the sliding locking seat moves along the circumference of the support frame and away from the limiting contact ball, the inclined surface of the driving protrusion squeezes the elastic engaging arm, causing the elastic engaging arm to deflect into the through sliding hole.

[0014] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the top of the sliding locking seat is provided with an arc-shaped support surface adapted to the contour of the support frame, and the sliding locking seat is provided with two sets of positioning grooves symmetrically arranged on both sides of the support surface, each set of positioning grooves including two arranged parallel to the axis of the sliding locking seat; The extending direction of the positioning groove is parallel to the sliding direction of the sliding locking seat, and coincides with the movement trajectory of the limiting contact ball of the probe fixing seat.

[0015] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, the support frame is a long strip integrally formed structure, and its outer peripheral wall is provided with two symmetrically distributed strip guide ribs extending along the axial direction. The side wall of the support frame is symmetrically provided with toothed meshing grooves evenly distributed along the axial direction. The toothed meshing grooves are adapted to the circular meshing teeth of the elastic meshing arm. The strip guide rib has a flat, raised structure that slides and adapts to the guide groove of the probe mounting base.

[0016] As a preferred embodiment of the adjustable prostate puncture surgery ultrasound probe depth limiting device of the present invention, wherein: the side of the limiting baffle away from the elastic slot is a contact surface that fits against the human body surface, the contact surface has a circular arc structure in cross section, and the edges of the contact surface are all rounded.

[0017] The beneficial effects of this invention are: 1. Through the structural cooperation between the sliding locking seat and the probe fixing seat in the depth adjustment locking assembly, the driving protrusion of the sliding locking seat can move along the transverse sliding groove. Its inclined surface presses against the integrally formed elastic engaging arm of the probe fixing seat, so that the circular engaging teeth at the free end of the elastic engaging arm accurately engage with the toothed engaging groove of the support frame, realizing the rigid limiting of the depth adjustment locking assembly and the support frame; at the same time, the limiting contact ball of the probe fixing seat is embedded in the positioning groove of the sliding locking seat. The two bite each other to counteract the reverse force of the elastic engaging arm and prevent the sliding locking seat from shifting in the opposite direction, so that the ultrasound probe is stably locked at the preset depth. This solves the problems of easy deviation when relying on hand grip to maintain depth and easy loosening of existing locking structures, ensuring that the depth is always stable during puncture, eliminating the need for repeated calibration, and improving surgical efficiency and puncture accuracy. 2. The elastic latch and the limiting plate form a movable fit through the annular boss and the clamping gap. The U-shaped bend structure at the rear of the elastic latch has good elastic deformation capability and can adapt to the multi-directional movement of the annular boss. At the same time, the arc-shaped outer peripheral wall of the annular boss matches the inner contour of the latch, and the thickness of the annular boss and the width of the clamping gap are precisely matched, leaving sufficient margin for pitch, swing and rotation adjustment. This allows the operator to freely adjust the angle of the ultrasound probe to complete axial rotation scanning and multi-directional exploration. Moreover, the angle adjustment does not interfere with the depth locking state, overcoming the defects of simple limiting tools that restrict probe operation. 3. The contact surface of the limiting baffle away from the elastic slot is designed as an arc-shaped structure that adapts to the surface of the anus, which can achieve a seamless and tight fit with the delicate skin around the anus. The arc-shaped contact surface forms a stable axial limiting reference, eliminating the need for the operator to continuously apply force to maintain the depth, reducing operator fatigue, and allowing them to focus on the puncture operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the ultrasonic probe depth limiting device in this invention; Figure 2 This is a top view of the ultrasonic probe depth limiting device of the present invention. Figure 3 This is a schematic diagram of the rear view of the ultrasonic probe depth limiting device in this invention. Figure 4 This is a schematic diagram of the right-side view of the ultrasonic probe depth limiting device in this invention. Figure 5 For the present invention Figure 4 Enlarged view of the A-section structure; Figure 6 This is a schematic diagram of the support frame in this invention; Figure 7 This is a schematic diagram of the depth adjustment locking component in this invention; Figure 8 This is an isometric schematic diagram of the depth adjustment locking component in this invention; Figure 9 This is a bottom-view axonometric drawing of the depth adjustment locking component in this invention.

[0020] Explanation of reference numerals in the attached drawings: 100, support frame; 101, strip guide rib; 102, toothed meshing groove; 200, depth adjustment locking assembly; 210, probe fixing seat; 211, through-hole; 212, guide groove; 213, U-shaped fastening frame; 214, arc-shaped locking side frame; 2141, anti-slip ridge; 215, transverse sliding groove; 216, elastic meshing arm; 2161, circular meshing tooth; 217, limit contact ball; 220, sliding locking seat; 221, locking wing; 222, driving protrusion; 223, arc-shaped support surface; 224, positioning groove; 300, elastic bayonet; 301, upper lobe; 302, lower lobe; 303, U-shaped groove; 304, locking opening; 400, limit stop; 401, annular boss; 402, anti-detachment terminal. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0024] Reference Figures 1-9 As shown, this is the first embodiment of the present invention. This embodiment provides an adjustable ultrasound probe depth limiting device for prostate biopsy, including an ultrasound probe and further comprising: Support frame 100; The depth adjustment locking component 200 is mounted on the support frame 100. The ultrasound probe is mounted and limited on the depth adjustment locking component 200 and moves along the axis of the support frame 100 with the depth adjustment locking component 200 to adjust the insertion depth of the ultrasound probe into the prostate puncture area in the patient's body, so as to realize the control of the insertion depth of the ultrasound probe during the process of entering the rectum through the anus, and adapt to the individual differences of the prostate position of different patients. An elastic latch 300 protrudes from the front end of the support frame 100. The elastic latch 300 is integrally formed with the support frame 100. The elastic latch 300 includes an upper lobe 301 and a lower lobe 302 arranged opposite to each other. A clamping gap is formed between the upper lobe 301 and the lower lobe 302. The rear part of the clamping gap is provided with a U-shaped bend structure that is recessed towards the support frame 100. A limiting baffle 400 is detachably and movably connected to the elastic bayonet 300. The limiting baffle 400 has an annular boss 401 extending along its edge. The annular boss 401 is adapted to the clamping gap of the elastic bayonet 300, so that the elastic bayonet 300 is clamped on the outer periphery of the annular boss 401 to form a relatively movable mating structure. The side of the limiting baffle 400 opposite to the elastic bayonet 300 is a contact surface that fits against the human body surface. The contact surface has a circular arc cross-section, and the edges of the contact surface are all rounded. The detachable connection design between the elastic bayonet 300 and the limiting baffle 400 facilitates preoperative assembly and postoperative disassembly and disinfection. The movable mating structure provides a basis for multi-directional adjustment of the ultrasound probe.

[0025] Specifically, the U-shaped bend structure is provided with an elastic latch 300, which has the ability to deform elastically. The cooperation structure between the elastic latch 300 and the annular boss 401 allows the annular boss 401 to rotate relative to the elastic latch 300 by a preset angle, thereby driving the ultrasound probe to adjust synchronously. It also allows the ultrasound probe to be adjusted in pitch and swing. At the same time, the limiting baffle 400 fits against the human body surface to prevent the ultrasound probe from being further inserted into the body. Structurally, it avoids tissue damage caused by the probe being excessively inserted into the rectum, thus ensuring the safety of the puncture operation.

[0026] like Figure 4 , Figure 5 as well as Figure 6 As shown, the end of the upper lobe 301 away from the support frame 100 is set as a pointed structure and bends in an arc towards the side closer to the lower lobe 302; the end of the lower lobe 302 away from the support frame 100 is set as a structure that bends in an arc towards the side closer to the upper lobe 301, and the middle section of the lower lobe 302 protrudes towards the side closer to the upper lobe 301 to form a U-shaped groove 303. The distal ends of the upper lobe 301 and the distal ends of the lower lobe 302 together form a locking opening 304 for locking the annular boss 401.

[0027] Among them, the upper lobe 301, the lower lobe 302, and the protrusion of the middle section of the lower lobe 302 towards the side closer to the upper lobe 301 together form a U-shaped bend structure.

[0028] Specifically, the curved tip of the upper lobe 301 is used to fit the outer peripheral curved surface of the annular boss 401, which not only improves the clamping fit of the annular boss 401, but also reserves a gap for adjusting the pitch angle of the annular boss 401. The curved structure of the lower lobe 302 cooperates with the upper lobe 301 to reduce the opening size of the latch to achieve axial positioning of the annular boss 401, so as to prevent the elastic latch 300 from detaching from the surface of the annular boss 401. The U-shaped groove 303 in the middle of the lower lobe 302 can further increase the elastic deformation margin of the elastic latch 300, ensuring that the elastic latch 300 is stably clamped on the annular boss 401. The latching opening 304 formed by the upper lobe 301 and the lower lobe 302 has an inner contour that matches the outer peripheral shape of the annular boss 401. While allowing the annular boss 401 and the elastic latch 300 to slide relative to each other, the bending gap between the upper and lower lobe 302 provides the annular boss 401 with pitch and swing space.

[0029] like Figure 4 and Figure 5 As shown, the outer peripheral wall of the annular boss 401 is set as an arc-shaped curved surface that matches the inner contour of the locking slot 304, and the thickness of the annular boss 401 matches the width of the clamping gap, so as to reserve the necessary movement margin for the pitch and swing adjustment of the annular boss 401 relative to the elastic locking slot 300 while maintaining the clamping stability of the elastic locking slot 300 on the annular boss 401.

[0030] like Figures 1-4 As shown, anti-detachment terminals 402 are provided at both ends of the annular boss 401 in the circumferential direction. The anti-detachment terminals 402 are used to abut against the outer wall of the elastic latch 300 to limit the elastic latch 300 from sliding out of the circumferential direction along the annular boss 401. The inner diameter of the locking slot 304 is smaller than the outer diameter of the annular boss 401. Based on this size, an axial locking limit is formed to prevent the limiting baffle 400 from axially disengaging from the elastic locking slot 300, without interfering with the relative rotation, pitch and swing adjustment between the elastic locking slot 300 and the annular boss 401.

[0031] like Figure 7 and Figure 8 As shown, the depth adjustment locking assembly 200 includes a probe fixing seat 210. The probe fixing seat 210 has a through sliding hole 211 in the middle along the axial direction for the support frame 100 to pass through and slide. The two ends of the through sliding hole 211 are symmetrically provided with guide grooves 212 communicating with the through sliding hole 211. The guide grooves 212 extend along the axial direction. The inner contour of the probe fixing seat 210 is adapted to the support frame 100 to limit the radial displacement of the probe fixing seat 210 relative to the support frame 100 and ensure axial sliding accuracy. The probe holder 210 has an inverted U-shaped fastening frame 213 integrally formed on both sides. The bottom surface of the probe holder 210 is provided with a symmetrical arc-shaped locking frame 214. The inner side wall of the arc-shaped locking frame 214 is provided with anti-slip ridges 2141. The arc-shaped locking frame 214 is used to clamp and position the ultrasound probe to prevent the ultrasound probe from axial movement and circumferential displacement during the puncture operation.

[0032] like Figure 7 and Figure 8 As shown, the probe holder 210 has transverse sliding grooves 215 on both sides above the through sliding hole 211. The side wall of the through sliding hole 211 of the probe holder 210 is integrally formed with an elastic meshing arm 216. The elastic meshing arm 216 is inclined towards the inside of the through sliding hole 211, and its free end is provided with a circular meshing tooth 2161. The probe holder 210 is provided with a limiting contact ball 217 on the side away from the free end of the elastic meshing arm 216.

[0033] like Figure 7 and Figure 9As shown, the depth adjustment locking assembly 200 also includes a sliding locking seat 220 that engages with the probe fixing seat 210. The sliding locking seat 220 has a symmetrical frame structure, with locking wings 221 on both sides that are adapted to the inverted U-shaped fastening frame 213 of the probe fixing seat 210. The bottom of the sliding locking seat 220 is integrally formed with a driving protrusion 222 that is adapted to the transverse sliding groove 215 of the probe fixing seat 210. When the sliding locking seat 220 moves along the circumference of the support frame 100 and moves away from the limiting contact ball 217, the inclined surface of the driving protrusion 222 presses the elastic engaging arm 216, causing the elastic engaging arm 216 to deflect into the through sliding hole 211.

[0034] The top of the sliding locking seat 220 is provided with an arc-shaped support surface 223 that is adapted to the contour of the support frame 100. The sliding locking seat 220 is provided with two sets of positioning grooves 224 symmetrically arranged on both sides of the support surface. Each set of positioning grooves 224 includes two arranged parallel to the axis of the sliding locking seat 220. The extending direction of the positioning groove 224 is parallel to the sliding direction of the sliding locking seat 220 and coincides with the movement trajectory of the limiting contact ball 217 of the probe fixing seat 210. When the sliding locking seat 220 moves to the locked position, when the driving protrusion 222 abuts against the free end of the elastic engagement arm 216, its limiting contact ball 217 is embedded in the positioning groove 224 near the free end of the elastic engagement arm 216. The engagement of the positioning groove 224 and the limiting contact ball 217 counteracts the reverse force of the elastic engagement arm 216 and prevents the sliding locking seat 220 from moving in the opposite direction. When the sliding locking seat 220 moves to the unlocked position, the limiting contact ball 217 is embedded in the positioning groove 224 away from the free end of the elastic engagement arm 216 to maintain the stability of the unlocked state.

[0035] like Figure 6 and Figure 8 As shown, the support frame 100 is a long strip-shaped integral structure. Two symmetrically distributed strip-shaped guide ribs 101 are provided on its outer peripheral wall along the axial direction. The side wall of the support frame 100 is symmetrically provided with toothed meshing grooves 102 evenly distributed along the axial direction. The toothed meshing grooves 102 are adapted to the circular meshing teeth 2161 of the elastic meshing arm 216. When the elastic meshing arm 216 deflects into the through sliding hole 211, the circular meshing teeth 2161 are engaged in the toothed meshing grooves 102 to lock the depth adjustment locking component 200 and the support frame 100. The strip guide rib 101 is a flat protruding structure that slides and adapts to the guide groove 212 of the probe fixing seat 210. It is used to limit the radial offset of the depth adjustment locking component 200 and ensure the axial sliding accuracy.

[0036] During operation, the annular protrusion 401 of the limiting baffle 400 is inserted into the clamping gap of the elastic slot 300. The axial anti-dislodgement of the limiting baffle 400 is achieved by relying on the size adaptation of the inner diameter of the locking slot 304 being smaller than the outer diameter of the annular protrusion 401. The anti-dislodgement terminal 402 of the annular protrusion 401 in the circumferential direction restricts the elastic slot 300 from sliding out of the annular protrusion 401 in the circumferential direction. Then, the ultrasound probe is clamped in the arc-shaped locking frame 214 of the probe fixing seat 210. The anti-slip ridge 2141 increases the clamping friction and prevents the ultrasound probe from axial movement and circumferential displacement during operation. After the assembly is completed, the arc-shaped contact surface of the limiting baffle 400 is attached to the patient's anal periphery to form a stable axial limiting reference that does not require continuous hand gripping. This completely replaces the traditional method of relying on the surgeon's hand strength to maintain depth, and avoids the problem of depth displacement caused by hand force fluctuations from the root.

[0037] During the depth adjustment phase, the depth adjustment locking component 200 is moved axially along the support frame 100. The strip guide rib 101 of the support frame 100 is slidably adapted to the guide groove 212 of the probe fixing seat 210, which restricts the radial displacement of the depth adjustment locking component 200 on the support frame 100. This ensures that the depth adjustment process of the ultrasound probe is accurate and smooth, without the need for repeated calibration. It effectively solves the pain point of needing to readjust after depth displacement in the background, which prolongs the operation time. By moving the depth adjustment locking component 200 axially along the support frame 100, the insertion depth of the ultrasound probe into the rectum is changed.

[0038] After the ultrasound probe is adjusted to the preset depth, the sliding locking seat 220 is pushed along the locking direction. The driving protrusion 222 at its bottom moves along the transverse sliding groove 215 of the probe fixing seat 210. The inclined surface of the driving protrusion 222 squeezes the elastic engaging arm 216, causing the circular engaging teeth 2161 of the elastic engaging arm 216 to be deflected into the through sliding hole 211 until the limiting contact ball 217 is embedded in the positioning groove 224 of the sliding locking seat 220 near the free end of the elastic engaging arm 216. The positioning groove 224 and the elastic engaging arm 216 bite together to counteract the reverse force of the elastic engaging arm 216, preventing the sliding locking seat 220 from shifting in the opposite direction. This achieves reliable locking of the depth adjustment locking component 200 and the support frame 100, avoiding the loosening of the depth due to external force interference when the operator excites the sampling needle or adjusts the angle. This solves the core problems of unreliable locking and easy depth deviation of the rotating limiting device.

[0039] During the puncture procedure, the U-shaped bend structure of the elastic latch 300 has excellent elastic deformation capability. Combined with the arc-shaped outer peripheral surface of the annular boss 401 and the precise fitting allowance of the clamping gap, the annular boss 401 can flexibly perform pitching, sliding, and other swinging movements relative to the elastic latch 300. This allows the ultrasound probe to adjust its pitch or radial angle synchronously with the support frame 100 and the depth adjustment locking component 200, adapting to the different exploration and puncture angle requirements during prostate puncture. This overcomes the shortcomings of simple limiting tools, such as rigid structure and restriction of probe operation flexibility. The limiting baffle 400 always fits tightly against the perianal surface. Relying on its arc-shaped smooth surface and rounded corner design, it fits the delicate skin, effectively preventing the ultrasound probe from excessively probing into the rectum and avoiding friction damage to the perianal skin during angle adjustment. At the same time, the surgeon does not need to be distracted by maintaining the depth, allowing the surgeon to focus on probe operation and sampling needle activation, further improving surgical efficiency and operational safety.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable ultrasound probe depth limiting device for prostate biopsy, comprising an ultrasound probe, characterized in that, Also includes: Support frame (100); A depth adjustment locking assembly (200) is mounted on the support frame (100), the ultrasonic probe is mounted and limited on the depth adjustment locking assembly (200), and moves axially along the support frame (100) with the depth adjustment locking assembly (200) to adjust the insertion depth of the ultrasonic probe; An elastic latch (300) protrudes from the front end of the support frame (100). The elastic latch (300) is integrally formed with the support frame (100). The elastic latch (300) includes an upper lobe (301) and a lower lobe (302) arranged opposite to each other. A clamping gap is formed between the upper lobe (301) and the lower lobe (302). The rear part of the clamping gap is provided with a U-shaped bend structure that is recessed towards the support frame (100). A limiting plate (400) is detachably and movably connected to the elastic latch (300). The limiting plate (400) is provided with an annular boss (401) extending along its edge. The annular boss (401) is adapted to the clamping gap of the elastic latch (300), so that the elastic latch (300) is clamped on the outer periphery of the annular boss (401) to form a relatively movable mating structure.

2. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 1, characterized in that: The upper lobe (301) is provided with a pointed structure at the end away from the support frame (100) and is curved towards the side closer to the lower lobe (302); The lower lobe (302) is configured with an arc-shaped bend at one end away from the support frame (100) and a U-shaped groove (303) is formed in the middle section of the lower lobe (302) that protrudes towards the side of the upper lobe (301). The distal end of the upper lobe (301) and the distal end of the lower lobe (302) together form a locking opening (304) for locking the annular boss (401).

3. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 2, characterized in that: The outer peripheral wall of the annular boss (401) is set as an arc-shaped curved surface that matches the inner contour of the locking opening (304), and the thickness of the annular boss (401) matches the width of the clamping gap.

4. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 3, characterized in that: Both ends of the annular boss (401) are provided with anti-detachment terminals (402), which are used to abut and limit the movement against the outer wall of the elastic bayonet (300). The inner diameter of the engagement port (304) is smaller than the outer diameter of the annular boss (401).

5. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 4, characterized in that: The depth adjustment locking assembly (200) includes a probe holder (210). The probe holder (210) has a through hole (211) in the middle along the axial direction for the support frame (100) to pass through and slide. The two ends of the through hole (211) are symmetrically provided with guide grooves (212) communicating with the through hole (211). The guide grooves (212) extend along the axial direction. The inner contour of the probe holder (210) is adapted to the support frame (100). The probe holder (210) has an inverted U-shaped fastening frame (213) integrally formed on both sides. The bottom surface of the probe holder (210) is provided with a symmetrical arc-shaped clamping frame (214). The inner side wall of the arc-shaped clamping frame (214) is provided with anti-slip ridges (2141). The arc-shaped clamping frame (214) is used to clamp and position the ultrasonic probe.

6. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 5, characterized in that: The probe holder (210) is provided with transverse sliding grooves (215) on both sides above the through sliding hole (211). The side wall of the through sliding hole (211) of the probe holder (210) is integrally formed with an elastic meshing arm (216). The elastic meshing arm (216) is inclined towards the inside of the through sliding hole (211), and its free end is provided with a circular meshing tooth (2161). A limit contact ball (217) is provided on the side of the probe holder (210) away from the free end of the elastic meshing arm (216).

7. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 6, characterized in that: The depth adjustment locking assembly (200) also includes a sliding locking seat (220) that engages with the probe fixing seat (210). The sliding locking seat (220) is a symmetrical frame structure with snap-fit ​​wings (221) on both sides that are adapted to the inverted U-shaped fastening frame (213) of the probe fixing seat (210). The bottom of the sliding locking seat (220) is integrally formed with a driving protrusion (222) that is adapted to the transverse sliding groove (215) of the probe fixing seat (210). When the sliding locking seat (220) moves along the circumference of the support frame (100) and moves away from the limiting contact ball (217), the inclined surface of the driving protrusion (222) presses the elastic engagement arm (216), causing the elastic engagement arm (216) to deflect into the through sliding hole (211).

8. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 7, characterized in that: The top of the sliding locking seat (220) is provided with an arc-shaped support surface (223) that is adapted to the contour of the support frame (100). The sliding locking seat (220) is provided with two sets of positioning grooves (224) symmetrically arranged on both sides of the support surface. Each set of positioning grooves (224) includes two arranged parallel to the axis of the sliding locking seat (220). The extension direction of the positioning groove (224) is parallel to the sliding direction of the sliding locking seat (220) and coincides with the movement trajectory of the limiting contact ball (217) of the probe fixing seat (210).

9. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 8, characterized in that: The support frame (100) is a long strip integral structure. Two symmetrically distributed strip guide ribs (101) are provided on its outer peripheral wall along the axial direction. The side wall of the support frame (100) is symmetrically provided with toothed meshing grooves (102) evenly distributed along the axial direction. The toothed meshing grooves (102) are adapted to the circular meshing teeth (2161) of the elastic meshing arm (216). The strip guide rib (101) is a flat protruding structure that is slidably adapted to the guide groove (212) of the probe fixing seat (210).

10. The adjustable prostate biopsy ultrasound probe depth limiting device as described in claim 9, characterized in that: The side of the limiting baffle (400) away from the elastic latch (300) is a contact surface that fits against the human body surface. The contact surface has a circular arc structure in cross section, and the edges of the contact surface are all rounded.

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