Visualizing a puncture needle

Abstract

The present application relates to the technical field of puncture needle, disclose a kind of visual puncture needle, including hollow puncture needle needle tube, the puncture needle lining core being inserted into puncture needle needle tube, the lining core seat being arranged at the rear end of puncture needle lining core, and the puncture needle needle seat being arranged at the rear end of puncture needle needle tube,It further includes the micro ultrasonic probe fixed to the front end of puncture needle lining core, for transmitting the signal collected to external display device;Direction limiting component, it is sleeved on the outside of puncture needle needle tube, direction limiting component interacts with the puncture needle needle tube during puncture process, provide enhanced damping feedback with the increase of angle of deviation. The convex rib-gradual change guide groove structure of the direction limiting component forms physical constraint, needle body can only advance along the axial direction, limit radial deviation. When deviation, damping force increases with angle, clear hand feeling feedback is provided to medical staff, effectively offset the influence of slight hand tremor, solve the problem of insufficient stability of traditional puncture direction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of puncture needles, in particular to a visual puncture needle. BACKGROUND

[0002] Puncture needles are the core instruments for clinical anesthesia and pain treatment, used to accurately deliver drugs or instruments to the lumbar intervertebral space, suitable for scenarios such as surgical anesthesia and labor analgesia. They are made of medical stainless steel or titanium alloy, containing a needle tube, a needle seat, and a lining core. The needle tube has a scale for easy depth control, and the needle tip is specially designed to reduce tissue damage. Modern versions often integrate ultrasound and directional limiting structures to improve accuracy and reduce complication risks, making them key instruments for safe and practical use in minimally invasive treatment.

[0003] In the patent with the patent number CN116509515A, a minimally invasive epidural puncture needle is disclosed, which relates to the technical field of medical instruments. It includes a needle seat, a needle cylinder, a finger pushing piece, and a clamping assembly. The finger pushing piece includes a connecting seat and a finger pushing plate. The needle seat can be connected to an external drug delivery pipeline, and the anesthetic enters the pipeline and flows out from the end of the needle cylinder. The finger pushing piece can rotate relative to the needle seat, so that the finger pushing plate can be in a vertical state during parallel puncture and vertical puncture, facilitating the abutment of the thumb and making the holding of the puncture needle more convenient. The spring pushes against the ejector pin, causing the hemispherical end of the ejector pin to insert into the clamping groove. At this time, the finger pushing piece and the needle seat are locked with each other. Rotating the finger pushing piece, the connecting seat side wall extrudes the ejector pin, causing the ejector pin to compress the spring. Finally, the ejector pin is separated from the first clamping groove and moves to the installation groove as a whole. When the finger pushing piece is rotated to 90 degrees, the second clamping groove is aligned with the installation groove. At this time, the spring is elongated, driving the hemispherical end of the ejector pin to insert into the second clamping groove, thereby realizing the clamping of the finger pushing piece and the needle seat.

[0004] The existing visual puncture needle has the following technical limitations:

[0005] Fuzzy tissue identification: Traditional blind puncture relies solely on tactile sensation, making it difficult to clearly distinguish the boundaries between the yellow ligament and surrounding soft tissues and bones. Novice operators may have difficulty determining the type of tissue contacted by the needle tip, leading to puncture deviation and additional damage to the patient.

[0006] Insufficient directional stability: Lack of physical constraint structure, slight hand tremors of the operator can cause the puncture needle to deviate along the axial direction, making it difficult to maintain the preset path and increasing the risk of accidental penetration of the yellow ligament.

[0007] Feedback lag: Existing sensing signals are only used as a reference, requiring manual stopping of the puncture by the operator, which has a reaction delay and lacks a mechanical intervention mechanism.

[0008] High complexity of ultrasound-guided puncture: Coupling agent is required, and one hand needs to hold the ultrasound probe and the other hand needs to hold the needle, making it difficult to coordinate the two hands, affecting the smoothness of clinical operation. SUMMARY

[0009] In view of the above problems in the prior art, a visual puncture needle is provided.

[0010] In one aspect of the present application, a visual puncture needle is provided, which aims to reduce the difficulty of puncture surgery.

[0011] The technical solution of the present application is: a visual puncture needle, comprising a hollow puncture needle tube, a puncture needle liner insertable into the puncture needle tube, a liner seat arranged at the rear end of the puncture needle liner, and a puncture needle seat arranged at the rear end of the puncture needle tube, further comprising:

[0012] A miniature ultrasonic probe fixed to the front end of the puncture needle liner, for transmitting the collected signals to an external display device;

[0013] A direction limiting assembly is sleeved on the outside of the puncture needle tube, which interacts with the puncture needle tube during the puncture process, providing a damping feedback that increases with the increase of the deflection angle.

[0014] Further, the direction limiting assembly comprises:

[0015] A hollow guide sleeve is sleeved on the outside of the puncture needle tube, and a gap is formed between the inner wall of the hollow guide sleeve and the outer wall of the puncture needle tube;

[0016] At least two elastic limiting ribs are arranged on the outer wall of the puncture needle tube in the axial direction;

[0017] A gradually changing guide groove matched with the elastic limiting rib is formed on the inner wall of the hollow guide sleeve in the axial direction;

[0018] Wherein, the groove depth of the gradually changing guide groove gradually decreases from the end close to the puncture needle seat to the end close to the miniature ultrasonic probe.

[0019] Further, the width of the gradually changing guide groove narrows in the direction away from the axis of the puncture needle tube.

[0020] Further, the middle part of the hollow guide sleeve is provided with an annular sheet, and the annular sheet is covered with adhesive tape.

[0021] Further, the outer wall of the puncture needle tube is provided with scale segments at equal intervals.

[0022] Further, the locking assembly is arranged at the end with the shallowest depth of the gradually changing guide groove, and comprises limiting members arranged at equal intervals in the hollow guide sleeve along the annular shape, wherein the limiting members are closed annular, extend along the outer wall of the needle tube of the puncture needle in an arc shape, have an arc-shaped side, a first straight side and a second straight side, the included angle between the first straight side and the second straight side is obtuse, the first straight side is close to the needle tube of the puncture needle, and a pressing ring is arranged at the included angle between the first straight side and the arc-shaped side, so that when the puncture needle tube deviates by more than a preset threshold, the pressing ring locks the puncture needle tube.

[0023] Further, the limiting members are provided with fissures at equal angles.

[0024] Further, the micro ultrasonic probe is fixed to the front end of the puncture needle liner core and is integrated with the puncture needle liner core, and the liner core seat and the puncture needle seat are detachably connected.

[0025] Further, the outer diameter of the puncture needle tube ranges from 1.6 mm to 2.0 mm, and the outer diameter of the micro ultrasonic probe matches the inner diameter of the puncture needle tube.

[0026] Further, the hollow guide sleeve is processed in an arc shape close to the micro ultrasonic probe.

[0027] The beneficial effects of the present application are as follows:

[0028] 1. By integrating the micro ultrasonic probe at the front end of the puncture needle liner core, the tissue can be directly contacted and the ultrasonic image can be transmitted in real time, so that the boundary of the yellow ligament and the surrounding soft tissue and bone can be clearly distinguished. Newbies can also accurately identify the type of tissue contacted by the needle tip without relying on pure hand feeling, effectively avoiding puncture deviation caused by ambiguous tissue identification, reducing additional damage to patients, and greatly improving the accuracy of puncture positioning.

[0029] 2. The convex rib-gradually changing guide groove structure of the direction limiting assembly forms a physical constraint, and the needle body can only advance in the axial direction, and the radial deviation is limited. When the needle body deviates, the damping force increases with the increase of the angle, so that the medical staff can clearly feel the feedback, effectively offsetting the influence of slight hand shaking, solving the problem of insufficient stability of traditional puncture direction, reducing the risk of accidental penetration of the yellow ligament, making the operation easier to control, and being not affected by the experience difference of the operator.

[0030] 3. The locking assembly automatically triggers mechanical locking when the deviation exceeds the preset threshold, and the pressing ring is driven to fit the needle tube through the deformation of the limiting member, so as to forcibly prevent excessive deviation. The response speed of this mechanical intervention mechanism far exceeds the artificial reaction, solves the pain point of feedback lag in the prior art, does not need to rely on manual stop operation, and completely eliminates the complications caused by excessive deviation from the structure, providing double protection for puncture safety. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a perspective view of the visual puncture needle of the present application.

[0032] Figure 2 This is a front view of the puncture needle of the present invention;

[0033] Figure 3 For the present invention Figure 2 Sectional view at point AA;

[0034] Figure 4 For the present invention Figure 2 Sectional view at point BB;

[0035] Figure 5 This is a disassembled diagram of the puncture needle of the present invention;

[0036] Figure 6 This is a perspective view of the directional limiting component in the puncture needle of the present invention.

[0037] Figure 7 For the present invention Figure 1 The right view;

[0038] Figure 8 For the present invention Figure 7 Sectional view at CC;

[0039] Figure 9 For the present invention Figure 8 Partial cutaway diagram;

[0040] Figure 10 This is a three-dimensional view of the limiting element in the puncture needle of the present invention.

[0041] In the picture:

[0042] 1. Puncture needle tube; 2. Puncture needle liner; 3. Liner seat; 4. Puncture needle seat; 5. Miniature ultrasonic probe; 6. Hollow guide sleeve; 7. Elastic limiting rib; 8. Gradient guide groove; 9. Annular plate; 10. Adhesive tape; 11. Scale section; 12. Limiting component; 13. Arc edge; 14. Straight edge one; 15. Straight edge two; 16. Compression ring; 17. Crack. Detailed Implementation

[0043] 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.

[0044] Example, refer to Figures 1-10For the embodiment of the present application, a visual puncture needle is provided, which comprises a hollow puncture needle tube 1, a puncture needle core 2 which can be inserted into the puncture needle tube 1, a core seat 3 arranged at the rear end of the puncture needle core 2, and a puncture needle seat 4 arranged at the rear end of the puncture needle tube 1, and scale segments 11 are arranged equidistantly on the outer wall of the puncture needle tube 1, and further comprising a miniature ultrasonic probe 5 fixed to the front end of the puncture needle core 2, which is used to transmit the collected signals to an external display device.

[0045] Specifically, the puncture needle tube 1 is made of medical 304 stainless steel, which has excellent biocompatibility and mechanical strength, and its outer diameter is set to 1.6-2.0mm, and its inner diameter is accurately matched with the installation requirements of the puncture needle core 2 and the miniature ultrasonic probe 5, and the inner wall is precisely polished, and the surface roughness is ≤0.8μm, which effectively reduces the sliding friction with the puncture needle core 2. The scale segments 11 are arranged equidistantly on the outer wall of the puncture needle tube 1 along the axial direction, the scale interval is 10mm, the scale range covers 0-15cm, and the scale line made by laser etching process is clear and wear-resistant, which can read the puncture depth in real time and intuitively, and avoid the risk of excessive puncture. The puncture needle core 2 is made of medical stainless steel which is matched with the material of the puncture needle tube 1, and its outer diameter is 0.05-0.1mm smaller than the inner diameter of the needle tube, which ensures that it is seamlessly fitted and smoothly slides after being inserted, and a special installation groove is reserved at its front end, and the groove wall is provided with anti-slip texture for stable fixing of the miniature ultrasonic probe 5. The core seat 3 and the puncture needle seat 4 are both injection molded by medical grade ABS material, which is light in texture and comfortable to hold; the rear end of the core seat 3 is connected with the puncture needle core 2 through threads, and there is no looseness after tightening, which prevents the displacement of the puncture needle core 2 during puncture; the puncture needle seat 4 provides multiple types of selection, including small wing needle seat, large wing needle seat and double-hand clasp needle seat, and medical staff can choose flexibly according to operation habits, and the double-hand clasp design can also reduce the fatigue of single-handed holding; the rear end of the puncture needle seat 4 is fixed with the puncture needle tube 1 by medical grade adhesive, and the connection is sealed to avoid body fluid infiltration. The miniature ultrasonic probe 5 takes piezoelectric ceramic wafer as the core sensing element, and its outer diameter is accurately matched with the front end installation groove of the puncture needle core 2, and it is fixed as a whole with the puncture needle core 2 through hot melting process, realizing seamless fitting with the puncture needle tube 1; the surface of the miniature ultrasonic probe 5 is covered with medical polyurethane insulation film, which prevents body fluid corrosion without affecting ultrasonic signal penetration; the miniature ultrasonic probe 5 is connected with the external display device through the built-in ultrasonic signal transmission line, and the transmission line is routed along the inside of the puncture needle core 2, avoiding entanglement or damage during puncture.

[0046] Reference Figures 1-6A directional limiting component is sleeved on the outside of the puncture needle tube 1. During puncture, the directional limiting component interacts with the puncture needle tube 1, providing damping feedback that increases with the increase of the deflection angle. The directional limiting component includes: a hollow guide sleeve 6, sleeved on the outside of the puncture needle tube 1, with a gap between its inner wall and the outer wall of the puncture needle tube 1; at least two elastic limiting ribs 7, axially disposed on the outer wall of the puncture needle tube 1; and a gradient guide groove 8 adapted to the elastic limiting ribs 7, axially formed on the inner wall of the hollow guide sleeve 6. The depth of the gradient guide groove 8 gradually decreases from the end near the puncture needle seat 4 to the end near the miniature ultrasound probe 5. The width of the gradient guide groove 8 narrows in the direction away from the axis of the puncture needle tube 1. The hollow guide sleeve 6 is rounded near the miniature ultrasound probe 5. An annular plate 9 is provided in the middle of the hollow guide sleeve 6, and the annular plate 9 is covered with adhesive tape 10.

[0047] Specifically, the directional limiting component is sleeved on the outside of the puncture needle tube 1. During puncture, it interacts with the puncture needle tube 1 to achieve enhanced damping feedback as the sway angle increases. The hollow guide sleeve 6 is made of medical-grade PEEK material, which combines rigidity and toughness to prevent deformation during puncture. Its inner diameter is 0.1-0.2mm larger than the outer diameter of the puncture needle tube 1. After sleeved, the inner wall forms a uniform gap with the outer wall of the needle tube to prevent compression that could cause signal interference or structural damage. The hollow guide sleeve 6 slides on the outer wall of the puncture needle tube 1. The end near the miniature ultrasound probe 5 is rounded with a radius of 1-2mm to reduce scratches on the skin and subcutaneous tissue and improve patient comfort. Two elastic limiting ribs 7 are axially arranged along the outer wall of the puncture needle tube 1, arranged in a ring-shaped symmetrical distribution (preferably eight ribs, with an included angle of 45°) to ensure all-round constraint. The ribs are made of medical alloy and coated with elastic material, exhibiting excellent elasticity and fatigue resistance. The cross-section is pentagonal with rounded edges. They are fixed to the outer wall of the puncture needle tube 1 through an embedded injection molding process, without affecting the sliding of the hollow guide sleeve 6. Gradient guide grooves 8 are axially formed on the inner wall of the hollow guide sleeve 6, and are adapted to the elastic limiting ribs 7 one by one. The groove depth gradually decreases from the end near the puncture needle seat 4 (proximal end) to the end near the miniature ultrasound probe 5 (distal end), forming a smooth gradient slope. At the same time, the width of the gradient guide grooves 8 narrows in the direction away from the axis of the puncture needle tube 1, with a narrowing angle of 5-10°, so that the lateral constraint force increases synchronously with the deflection angle when the ribs slide. The hollow guide cannula 6 has an integrally formed annular piece 9 in the middle. The annular piece 9 is made of medical-grade silicone material with a thickness of 2-3mm and a diameter 1.5-2cm larger than the outer diameter of the cannula, so that it can fit the patient's skin surface. The outer side of the annular piece 9 is covered with a layer of medical pressure-sensitive adhesive tape 10. The surface of the adhesive tape 10 has an anti-adhesion film. When using it, the anti-adhesion film can be removed to fix the hollow guide cannula 6 around the puncture site, so as to prevent the hollow guide cannula 6 from shifting during operation and enhance the directional constraint stability.

[0048] Referring to Figures 7-10 Further comprising a locking assembly arranged at the shallowest end of the gradual guide groove 8, which comprises a plurality of limiting members 12 arranged equidistantly along the annular direction inside the hollow guide sleeve 6. The limiting member 12 is a closed ring extending along the arc of the outer wall of the needle tube 1 of the puncture needle, and has an arc-shaped edge 13, a first straight edge 14 and a second straight edge 15 connected with each other. The included angle between the first straight edge 14 and the second straight edge 15 is obtuse, the first straight edge 14 is close to the needle tube 1 of the puncture needle, and a pressing ring 16 is embedded at the junction of the first straight edge 14 and the arc-shaped edge 13. When the deflection angle of the needle tube 1 of the puncture needle exceeds the preset threshold, the pressing ring 16 locks the needle tube 1 of the puncture needle. The limiting member 12 is provided with a plurality of cracks 17 arranged equidistantly.

[0049] Specifically, the limiting member 12 is made of medical elastic nickel-titanium alloy and has good deformation recovery capability. The structure of the limiting member 12 is composed of the arc-shaped edge 13, the first straight edge 14 and the second straight edge 15 connected with each other. The included angle between the first straight edge 14 and the second straight edge 15 is an obtuse angle of 120-150°. The limiting member 12 is embedded in the inner wall of the hollow guide sleeve 6 and partially exposed. The first straight edge 14 is close to one side of the needle tube 1 of the puncture needle, and the second straight edge 15 is fixed to the inner wall of the guide sleeve by ultrasonic welding process, which is firm and has no obvious protrusion. The pressing ring 16 is embedded at the junction of the first straight edge 14 and the arc-shaped edge 13. The pressing ring 16 is made of medical silica gel and has a circular cross section. The gap between the pressing ring 16 and the outer wall of the needle tube 1 of the puncture needle is 0.05-0.1 mm, which does not affect the normal needle insertion and can tightly fit the needle tube when locked. The limiting member 12 is provided with 3-6 cracks 17 arranged equidistantly. The cracks 17 penetrate the limiting member 12 and are used to increase the deformation of the limiting member 12, ensure smooth opening and rapid recovery when locked, and avoid material fatigue failure.

[0050] Preferably, the micro-ultrasound probe 5 is fixed to the front end of the puncture needle liner 2 and is integrated with the puncture needle liner 2. The liner seat 3 and the puncture needle seat 4 are detachably connected.

[0051] In use, in the preoperative preparation stage, the micro-ultrasound probe 5 is fixed to the front end of the puncture needle liner 2 by a hot melting process, the puncture needle liner 2 is inserted into the puncture needle tube 1, and the micro-ultrasound probe 5 is flush with the front end of the puncture needle tube 1; the hollow guide sleeve 6 is sleeved outside the needle tube close to the needle head, the puncture needle tube 1 is pierced into a few millimeters for positioning after the puncture position is determined, then the hollow guide sleeve 6 is pushed towards the needle head until the annular sheet 9 contacts the skin, the adhesive tape 10 is torn off to prevent adhesion, and the hollow guide sleeve 6 is fixed around the puncture site of the patient; the micro-ultrasound probe 5 is connected with the external display device through the ultrasonic signal transmission line, and the debugging is completed. After the puncture is started, the medical staff pushes the needle tube by hand holding the puncture needle hub 4, the micro-ultrasound probe 5 directly contacts the target area tissue, the ultrasonic signals of the yellow ligament, surrounding soft tissue and bone are collected in real time and transmitted to the display screen, the bone density is identified, the tissue boundary is clearly presented, and the problem of "fuzzy tissue identification" is solved. In the process of needle insertion, the elastic limiting convex ribs 7 on the outer wall of the puncture needle tube 1 are always embedded in the gradually changing guide groove 8 of the hollow guide sleeve 6, forming a physical constraint to limit the radial deflection of the puncture needle tube 1; if slight hand tremor occurs, the elastic limiting convex ribs 7 slide along the bottom of the gradually changing guide groove 8, and as the groove depth gradually changes and the width narrows, the larger the deflection angle, the stronger the lateral damping force, and the hand feeling feedback is transmitted through the puncture needle hub 4 to realize "damping feedback that increases with the increase of the deflection angle". When the deflection angle exceeds the preset threshold (such as ±5°), the straight edge one 14 of the needle tube extrusion limiting piece 12 makes the included angle between the straight edge one 14 and the straight edge two 15 increase, the arc-shaped edge 13 is elongated, the extrusion ring 16 is close to the needle tube and tightly attached, mechanical locking is realized, and excessive deflection is forcibly prevented. After the operator perceives the feedback, the hand posture is fine-tuned to make the needle tube return to axial alignment, the limiting piece 12 is reset under the elastic action, and the locking is released; then the puncture depth is accurately controlled in combination with the ultrasonic image and the puncture needle tube scale section 11, until the operation is completed. The whole process does not need to coordinate the ultrasound probe and the puncture needle with both hands, does not need to use a coupling agent, reduces the operation complexity, and at the same time has visual accuracy and mechanical safety, which is suitable for clinical scenes such as epidural puncture and lumbar puncture.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A visualization needle comprising a hollow needle cannula (1), a needle hub (2) insertable into the needle cannula (1), a hub seat (3) arranged at the rear end of the needle hub (2), and a needle hub (4) arranged at the rear end of the needle cannula (1), characterized in that Also include: The micro-ultrasound probe (5) fixed to the front end of the puncture needle liner core (2) is used to transmit the collected signals to the external display device; The direction limiting assembly is sleeved on the outer side of the puncture needle tube (1), and the direction limiting assembly interacts with the puncture needle tube (1) during the puncture process, and provides a damping feedback that increases with the increase of the deflection angle; The direction limiting assembly comprises: The hollow guide sleeve (6) is sleeved on the outer side of the puncture needle tube (1), and a gap is formed between the inner wall of the hollow guide sleeve (6) and the outer wall of the puncture needle tube (1); At least two elastic limiting ribs (7) are arranged on the outer wall of the puncture needle tube (1) in the axial direction; The gradually changing guide groove (8) matched with the elastic limiting rib (7) is arranged on the inner wall of the hollow guide sleeve (6) in the axial direction; The groove depth of the gradually changing guide groove (8) gradually decreases from one end close to the puncture needle needle seat (4) to one end close to the micro-ultrasound probe (5); The width of the gradually changing guide groove (8) narrows in the direction away from the axis of the puncture needle tube (1).

2. The visualizing puncture needle of claim 1, wherein, The middle part of the hollow guide sleeve (6) is provided with an annular sheet (9), and the annular sheet (9) is covered with adhesive tape (10).

3. The visualizing puncture needle of claim 1, wherein, The outer wall of the puncture needle tube (1) is provided with scale segments (11) at equal intervals.

4. The visualizing puncture needle of claim 1, wherein, The locking assembly is arranged at the end with the shallowest depth of the gradually changing guide groove (8), and comprises a limiting piece (12) arranged in the hollow guide sleeve (6) at equal intervals in a ring shape. The limiting piece (12) is a closed ring and extends along the arc-shaped outer wall of the puncture needle tube (1), has a connected arc-shaped edge (13), a straight edge one (14) and a straight edge two (15), the included angle between the straight edge one (14) and the straight edge two (15) is obtuse, the straight edge one (14) is close to the puncture needle tube (1), and the extrusion ring (16) is arranged at the included angle between the straight edge one (14) and the arc-shaped edge (13). When the deflection angle of the puncture needle tube (1) exceeds the preset threshold value, the extrusion ring (16) locks the puncture needle tube (1).

5. The visualizing puncture needle of claim 4, wherein, The limiting piece (12) is provided with a fissure (17) at equal angles.

6. The visualizing puncture needle of claim 1, wherein, The micro-ultrasound probe (5) is fixed to the front end of the puncture needle liner core (2) and is integrally combined with the puncture needle liner core (2). The liner seat (3) and the puncture needle needle seat (4) are detachably connected.

7. The visualizing puncture needle of claim 1, wherein, The outer diameter of the puncture needle tube (1) ranges from 1.6mm to 2.0mm, and the outer diameter of the micro-ultrasound probe (5) matches the inner diameter of the puncture needle tube (1).

8. The visualizing puncture needle of claim 1, wherein, The end of the hollow guide sleeve (6) close to the micro-ultrasound probe (5) is arc-shaped.

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