A puncture positioning stent with thoracic cavity limiting function

Abstract

This invention relates to the field of medical auxiliary devices. The objective is to provide a puncture positioning stent with a chest cavity limiting function, comprising a U-shaped stent body, the body consisting of an L-shaped pad and a top frame disposed on top of the pad; a puncture guide movable along the length of the top frame is disposed on the top frame, and a chest cavity limiting mechanism is also disposed on the top frame; the chest cavity limiting mechanism includes two vertical pressure rods that can move vertically, and a pressure plate for pressing against the patient's chest is disposed at the lower end of the pressure rods. This invention can limit the rise and fall of the patient's chest cavity, avoid interference with the puncture caused by the patient's breathing, and improve the accuracy and stability of the puncture.

Description

Technical Field

[0001] This invention relates to the field of medical assistive devices, specifically to a puncture positioning stent. Background Technology

[0002] Thoracentesis is a common procedure used in cardiology, hepatobiliary surgery, and other medical settings for tissue biopsy and drainage of effusions. Currently, the traditional method involves doctors relying on their experience to directly insert the puncture instrument. However, this method requires a high level of skill and mental state from the doctor, and due to inaccurate positioning, it carries certain safety risks, especially for patients requiring complex or deep punctures, where these risks are significantly increased.

[0003] To address this, numerous puncture guidance tools have emerged in existing technologies. These tools use a fixed-direction cannula / sleeve with puncture guidance function to guide the puncture needle, thereby significantly improving the accuracy and stability of the puncture procedure and reducing puncture risks. However, in practice, we have found that while these puncture guidance tools are well-suited for punctures at other sites, they are less effective during thoracentesis due to the chest cavity's movement caused by the patient's breathing. Even under endoscopic guidance, these simple, fixed-base tools are not fully utilized. Generally, doctors communicate with patients during puncture, instructing them to hold their breath briefly to eliminate interference from the chest cavity's contraction and expansion. The doctor then quickly inserts the needle within this window for precise puncture positioning. However, some patients cannot effectively cooperate with the doctor by holding their breath as instructed, leading to puncture failure. Summary of the Invention

[0004] The purpose of this invention is to provide a puncture positioning stent with thoracic cavity limiting function that can reduce respiratory interference.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is a puncture positioning stent with thoracic cavity limiting function, including a U-shaped stent body, the body being composed of an L-shaped pad and a top structure disposed on the top of the pad;

[0006] The top frame is equipped with a puncture guide that can move along the length of the top frame, and the top frame is also equipped with a chest cavity limiting mechanism for restricting the rise and fall of the patient's chest cavity.

[0007] The chest cavity limiting mechanism includes two vertical pressure rods that can be raised and lowered vertically, and the lower end of the pressure rods is provided with a pressure plate for pressing against the patient's chest.

[0008] Preferably, the pressure rod is a screw rod, and the top frame is provided with a screw hole that mates with the screw rod, so that the lifting and lowering are achieved by rotating the screw rod.

[0009] Preferably, the lower end of the pressure rod is hinged to the pressure plate and is locked or unlocked by a locking bolt.

[0010] Preferably, the thoracic cavity limiting mechanism further includes a temporary release component, which includes a lifting sleeve disposed on the top frame opposite to the screw; the interior of the lifting sleeve is a square hole, and a square mounting block that can be raised and lowered within the square hole is adapted therein; the screw hole is disposed on the mounting block;

[0011] The bottom of the middle section of the top frame is provided with a bottom groove, and the temporary release assembly also includes a locking device set in the bottom groove; the locking device includes two pull ropes and two reels with torsion springs arranged side by side, one end of the two pull ropes is wound onto the two reels respectively, and the other end extends to the lower part of the lifting sleeves on both sides and is connected to the mounting block; an unlocking slide rod is also provided between the two reels, the upper end of the unlocking slide rod passes through the sliding hole on the top frame, and the end is provided with a pressing head, and a return spring is provided between the pressing head and the top frame; a rubber friction head is provided at the lower end of the unlocking slide rod, and the rubber friction head can be locked between the two reels under the action of the return spring.

[0012] Preferably, friction teeth are arranged in a ring on the lower circumference of the reel, and the upper end of the rubber friction head is spherical.

[0013] Preferably, the bottom surface of the top frame is provided with a rope groove extending along the length of the top frame, one end of the rope groove is connected to the bottom groove, and the other end is connected to the inner cavity of the lifting sleeve; the pulling rope is located in the rope groove.

[0014] Preferably, the top frame is hinged to the pad and locked or unlocked by a locking handwheel.

[0015] Preferably, a diagonal brace is provided on one side of the vertical edge of the pad, one end of the diagonal brace is hinged to the vertical edge of the pad, and the other end is provided with a hook notch. A short column is provided on the top frame at a position opposite to the hook notch, and the hook notch of the diagonal brace can be engaged with the short column to form support for the top frame.

[0016] Preferably, the rear part of the top frame is provided with a T-shaped sliding groove extending along the length of the top frame, and a strip-shaped pin groove is provided side by side on one side of the sliding groove;

[0017] The puncture guide includes a T-shaped slider adapted in a groove, the slider being provided with a locking pin and adapted with a transverse locking nut, the locking pin being located in a pin groove and forming a lock between the slider and the top frame through the transverse locking nut; the T-shaped rod of the slider extends out of the top frame from the rear and is connected to the support arm; the support arm is provided with a puncture guide tube.

[0018] Preferably, the slider T-shaped rod is provided with a vertical hole, and the end of the support arm near the slider is provided with an adjusting rod that cooperates with the vertical hole. The adjusting rod is provided with two height locking nuts, and the height of the support arm is locked by the two height locking nuts.

[0019] The support arm has a spherical shell in the middle, and an angle adjusting body is installed inside the spherical shell. The angle adjusting body is locked to the spherical shell by an angle locking bolt. The puncture guide tube is installed inside the angle adjusting body and is threadedly connected to the angle adjusting body.

[0020] The beneficial effects of this invention are mainly reflected in its ability to limit the rise and fall of the patient's chest cavity, avoiding interference with puncture caused by the patient's breathing, and improving the accuracy and stability of the puncture. Specifically, in the process of using this invention, after the main body of the stent is installed, the patient lies on the pad in a prone or supine position as needed. After the patient exhales and holds their breath, the operator adjusts the pressure rod until the pressure plate presses down on the patient's body. Under endoscopic or fluoroscopic guidance, the puncture guide is adjusted to the required position and locked in place, and the puncture can then be performed. During the puncture process, because this invention can limit the patient's chest cavity through the pressure plate, avoiding large-scale rise and fall, it can effectively cooperate with the doctor in the puncture and needle insertion operation, greatly improving the accuracy and stability of the puncture. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0023] Figure 3 for Figure 1 Enlarged view of section B;

[0024] Figure 4 for Figure 1 The CC view of the structure shown. Detailed Implementation

[0025] like Figure 1 As shown, the present invention is a puncture positioning stent with chest cavity limiting function, which is mainly used to guide the puncture needle in some thoracentesis with high puncture difficulty and deep puncture, so as to ensure the stability and accuracy of puncture.

[0026] This invention includes a U-shaped support body, which consists of an L-shaped pad 1 and a top frame 2 disposed on top of the pad 1. The pad 1 has an integral structure and is generally made of aluminum alloy or high-strength plastic. Its bottom is provided with an anti-slip layer to improve its installation stability. When in use, the patient lies supine or prone on the pad 1. To improve overall comfort, the pad 1 can be provided with a certain ergonomic curvature.

[0027] The top frame 2 is strip-shaped and serves as the mounting base for the puncture guide and the thoracic cavity limiting mechanism. It is a separate design from the pad 1, assembled during use, or the two are hinged together; that is, the top frame 2 is hinged to the pad 1 and locked or unlocked by the locking handwheel 17. The top frame 2 can be swung to a horizontal position or raised to allow the patient to lie down. Since the top frame 2 serves as the mounting base for the core component of this invention, to improve its overall stability, such as... Figure 1 As shown, a diagonal brace 18 can be provided on one side of the vertical edge of the pad 1. One end of the diagonal brace 18 is hinged to the vertical edge of the pad 1, and the other end is provided with a hook notch. A short column 19 is provided on the top frame 2 at a position opposite to the hook notch. The hook notch of the diagonal brace 18 can be engaged with the short column 19 to form support for the top frame 2.

[0028] The top frame 2 of the present invention is provided with a puncture guide that is movable along the length of the top frame 2. The puncture guide can move on the top frame 2 to adjust its position in the lateral direction. There are many specific structures for the puncture guide, for example: Figure 1 and 4 As shown, the rear of the top frame 2 is generally provided with a T-shaped groove 20 extending along the length of the top frame 2, and a strip-shaped pin groove 21 is arranged side by side on one side of the groove 20. The puncture guide includes a T-shaped slider 22 adapted within the groove 20. The slider 22 is provided with a locking pin 23 and is adapted with a transverse locking nut 24. The locking pin 23 is located within the pin groove 21, and the transverse locking nut 24 forms a lock between the slider 22 and the top frame 2. Loosening the transverse locking nut 24 allows the slider 22 to slide on the top frame 2, so as to facilitate the adjustment of the transverse position of the puncture guide. The T-shaped rod of the slider 22 extends out of the top frame 2 from the rear side and is connected to the support arm 25. The support arm 25 is provided with a puncture guide tube 26, which is used for puncture guidance.

[0029] Of course, to broaden the adjustable range of the puncture guide tube 26 and achieve multi-directional adjustment in the horizontal, vertical, and angular directions, a better approach of the present invention is to provide a vertical hole on the T-shaped rod of the slider 22, and to provide an adjusting rod 27 that cooperates with the vertical hole at the end of the support arm 25 near the slider 22. Two height locking nuts 28 are provided on the adjusting rod 27, and the height of the support arm 25 is locked by the two height locking nuts 28. By adjusting the height locking nuts 28, the height of the adjusting rod 27 can be adjusted. After adjustment, the height locking nuts 28 at both ends are tightened to clamp the rod of the slider 22.

[0030] To achieve angle adjustment, a spherical shell 29 is provided in the middle of the support arm 25, and an angle adjusting body 30 is provided inside the spherical shell 29. The angle adjusting body 30 is locked to the spherical shell 29 by an angle locking bolt 31. The puncture guide tube 26 is installed inside the angle adjusting body 30 and is threadedly connected to the angle adjusting body 30. Of course, in addition to the above-described structural form, it is also feasible to mount the puncture guide on the top frame 2 and achieve lateral, vertical, and angle adjustment of the puncture guide through certain designs. Since there are many specific structural forms that can be achieved, this invention will not exemplify them.

[0031] The biggest difference between this invention and traditional puncture positioning supports lies in the addition of a chest cavity limiting mechanism on the top frame 2. This mechanism restricts the movement of the patient's chest cavity, preventing displacement during puncture or positioning and ensuring the accuracy and stability of the puncture. It includes two vertically oriented pressure rods 3 capable of vertically raising and lowering. The lower end of each pressure rod 3 has a pressure plate 4 for pressing against the patient's chest. From a structural simplicity perspective, the simplest approach is to use a screw as the pressure rod 3, with a threaded hole on the top frame 2 that mates with the screw. Raising and lowering are achieved by rotating the screw. This threaded connection not only facilitates adjustment but also simultaneously locks the screw, ensuring the stability of the pressure rods 3 and the pressure plate 4. The shape of the pressure plate 4 can be ergonomically designed, such as an arc or other comfortable shape. To accommodate adjustments to the angle of the pressure plate 4, the lower end of the pressure rod 3 can be hinged to the pressure plate 4, and locked or unlocked using a locking bolt 5.

[0032] In use, after the main body of the stent is installed, the patient lies on the pad 1 in either a prone or supine position as needed. After exhaling and holding their breath, the operator adjusts the pressure rod 3 until the pressure plate 4 presses down on the patient's body. Under endoscopic or fluoroscopic guidance, the puncture guide is adjusted to the required position and locked in place, and the puncture can then be performed. During the puncture, because the pressure plate 4 of this invention can restrict the patient's chest cavity and prevent large-scale fluctuations, it can effectively assist the doctor in the puncture and needle insertion operation, greatly improving the accuracy and stability of the puncture.

[0033] Before puncture, positioning often takes a significant amount of time, and maintaining the patient's breath-holding state during this period is difficult. Therefore, the pressure plate 4 can usually be released intermittently to facilitate breathing. However, because the pressure rod 3 of this invention is threaded onto the top frame 2, releasing it is cumbersome, and the inability to guarantee perfectly consistent height adjustments can lead to errors during endoscopic positioning with the puncture guide.

[0034] Therefore, a better aspect of this invention is that it ensures the relatively stable pressing positions of the lever 3 and the pressure plate 4, while simultaneously enabling rapid release of the pressure plate 3 and the lever 4, thereby meeting the patient's breathing needs even when the positioning time is relatively long. To this end, combined with... Figure 1-3 As shown, the thoracic cavity limiting mechanism of the present invention further includes a temporary release component, which includes a lifting sleeve 6, which is disposed on the top frame 2 opposite to the screw. The interior of the lifting sleeve 6 is a square hole, and a square mounting block 7 that can move up and down within the square hole is adapted therein. The mounting block 7 can move up and down within the square hole, but cannot rotate. The screw hole is provided on the mounting block 7.

[0035] The bottom of the middle section of the top frame 2 is provided with a bottom groove 8, and the temporary release assembly also includes a locking device disposed in the bottom groove 8. Through the locking device, during release, the mounting block 7 inside the lifting sleeve 6 can move up and down, thereby relieving pressure and allowing the patient to inhale. When the patient exhales, the mounting block 7 can reset and quickly lock.

[0036] like Figure 3As shown, the locking device of the present invention includes two pull ropes 9 and two side-by-side reels 10 with torsion springs. One end of each pull rope 9 is wound onto the two reels 10, and the other end extends to the lower part of the lifting sleeves 6 on both sides and is connected to the mounting block 7. An unlocking slide rod 11 is also provided between the two reels 10. The upper end of the unlocking slide rod 11 passes through a sliding hole on the top frame 2, and a pressing head 12 is provided at the end. A return spring 13 is provided between the pressing head 12 and the top frame 2. A rubber friction head 14 is provided at the lower end of the unlocking slide rod 11. The rubber friction head 14 can be engaged between the two reels 10 under the action of the return spring 13 to form a lock on the reels 10.

[0037] During use, after the patient exhales and holds their breath, the pressure lever 3 and pressure plate 4 are adjusted to the normal pressing position as described above. This allows for precise positioning of the puncture guide during endoscopic procedures. If the procedure is prolonged, the operator can press the pressing head 12 of the unlocking slide lever 11, causing it to move downwards. This disengages the rubber friction head 14 from the reel 10, allowing the reel 10 to rotate. After the patient inhales, the expansion of the chest cavity causes the mounting block 7 inside the lifting sleeve 6 to move upwards, pulling the traction rope 9 and the reel 10. Upon exhalation, the torsion spring on the reel 10 rewinds the traction rope 9, resetting the mounting block 7. Because the pressure lever 3 on the mounting block 7 does not move relative to it, it maintains relative stability with the body. After the patient exhales completely, releasing the unlocking slide lever 11 quickly locks the reel 10, thus quickly locking the mounting block 7. This allows for intermittent temporary unlocking while ensuring positional stability.

[0038] In addition, to further improve the friction between the reel 10 and the rubber friction head 14 and ensure the locking effect, friction teeth 15 are arranged in a ring on the lower circumference of the reel 10, and the upper end of the rubber friction head 14 is spherical to facilitate better engagement between the two reels 10. To further improve the stability of the pull rope 9's movement, a rope groove 16 extending along the length of the top frame 2 is provided on the bottom surface of the top frame 2. One end of the rope groove 16 communicates with the bottom groove 8, and the other end communicates with the inner cavity of the lifting sleeve 6. The pull rope 9 is located within the rope groove 16.

Claims

1. A puncture positioning stent with thoracic cavity limiting function, characterized in that: It includes a U-shaped bracket body, which is composed of an L-shaped backing plate (1) and a top frame (2) arranged on the top of the backing plate (1); A puncture guide is arranged on the top frame (2) and can move in the length direction of the top frame (2). A thoracic cavity limiting mechanism is also arranged on the top frame (2); The thoracic cavity limiting mechanism includes two vertical pressure rods (3) that can be lifted and lowered vertically. A pressing plate (4) for pressing on the patient's chest is arranged at the lower end of the pressure rod (3); The pressure rod (3) is a screw rod, and a screw hole matching the screw rod is arranged on the top frame (2). Lifting is formed by rotating the screw rod; The thoracic cavity limiting mechanism further includes a temporary release component. The temporary release component includes a lifting sleeve (6), and the lifting sleeve (6) is arranged at a position on the top frame (2) opposite to the screw rod; the inside of the lifting sleeve (6) is a square hole, and a square mounting block (7) that can be lifted and lowered in the square hole is fitted in the square hole; the screw hole is arranged on the mounting block (7); A bottom groove (8) is arranged at the bottom of the middle section of the top frame (2). The temporary release component further includes a lock arranged in the bottom groove (8); the lock includes two pulling ropes (9) and two coiled reels (10) with torsion springs arranged side by side. One ends of the two pulling ropes (9) are respectively wound on the two coiled reels (10), and the other ends respectively extend below the lifting sleeves (6) on both sides and are connected to the mounting block (7); an unlocking sliding rod (11) is also arranged between the two coiled reels (10). The upper end of the unlocking sliding rod (11) passes through a sliding hole on the top frame (2), and a pressing head (12) is arranged at the end. A return spring (13) is arranged between the pressing head (12) and the top frame (2); a rubber friction head (14) is arranged at the lower end of the unlocking sliding rod (11), and the rubber friction head (14) can be clamped between the two coiled reels (10) under the action of the return spring (13) to form a lock on the coiled reels (10).

2. The puncture positioning stent with thoracic cavity limiting function according to claim 1, characterized in that: The lower end of the pressure rod (3) is hinged to the pressing plate (4) and is locked or unlocked through a locking bolt (5).

3. The puncture positioning stent with thoracic cavity limiting function according to claim 2, characterized in that: Friction teeth (15) are arranged in a ring on the circumferential surface of the lower end of the coiled reel (10), and the upper end of the rubber friction head (14) is spherical.

4. The puncture positioning stent with thoracic cavity limiting function according to claim 3, characterized in that: A rope groove (16) extending in the length direction of the top frame (2) is arranged on the bottom surface of the top frame (2). One end of the rope groove (16) is communicated with the bottom groove (8), and the other end is communicated with the inner cavity of the lifting sleeve (6); the pulling rope (9) is located in the rope groove (16).

5. The puncture positioning stent with thoracic cavity limiting function according to claim 4, characterized in that: The top frame (2) is hinged to the backing plate (1) and is locked or unlocked through a locking handwheel (17).

6. The puncture positioning stent with thoracic cavity limiting function according to claim 5, characterized in that: An inclined strut (18) is arranged on one side of the vertical edge of the backing plate (1). One end of the inclined strut (18) is hinged to the vertical edge of the backing plate (1), and a hook notch is arranged at the other end. A short column (19) is arranged at a position on the top frame (2) opposite to the hook notch. The hook notch of the inclined strut (18) can be clamped on the short column (19) to form a support for the top frame (2).

7. The puncture positioning stent with thoracic cavity limiting function according to claim 6, characterized in that: The rear of the top frame (2) is provided with a T-shaped groove (20) extending along the length of the top frame (2). A strip-shaped pin groove (21) is provided side by side on one side of the groove (20). The puncture guide includes a T-shaped slider (22) adapted in the groove (20). A locking pin (23) is provided on the slider (22) and a transverse locking nut (24) is adapted to it. The locking pin (23) is located in the pin groove (21) and forms a lock between the slider (22) and the top frame (2) through the transverse locking nut (24). The T-shaped rod of the slider (22) extends out of the top frame (2) from the rear and is connected to the support arm (25). A puncture guide tube (26) is provided on the support arm (25).

8. The puncture positioning stent with thoracic cavity limiting function according to claim 7, characterized in that: The slider (22) has a vertical hole on its T-shaped rod. The support arm (25) has an adjusting rod (27) that matches the vertical hole at one end near the slider (22). The adjusting rod (27) has two height locking nuts (28), and the height of the support arm (25) is locked by the two height locking nuts (28). The support arm (25) is provided with a spherical shell (29) in the middle, and an angle adjustment body (30) is provided inside the spherical shell (29). The angle adjustment body (30) is locked to the spherical shell (29) by an angle locking bolt (31). The puncture guide tube (26) is installed inside the angle adjustment body (30) and is threadedly connected to the angle adjustment body (30).

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