Salvary gland calculus removing device and kit

Abstract

The utility model belongs to the technical field of calculus treatment instruments, and particularly provides a salivary gland calculus removing device and suite, the salivary gland calculus removing device comprises a connecting rod and an elastic expansion head, the connecting rod is a flexible rod and is used for pushing and pulling the elastic expansion head, the elastic expansion head has a compressed state and an open state, and when the elastic expansion head is in the open state, the elastic expansion head is in the closed state. The outer diameter of the elastic expansion head is matched with the pipe diameter of the salivary gland pipeline, the elastic expansion head can slide in the guide pipe when in a compressed state, and the elastic expansion head is connected to one end of the connecting rod; after the elastic expansion head is compressed to reach the specified depth of the salivary gland pipeline, the elastic expansion head expands and expands due to the elasticity of the elastic expansion head, the outer diameter of the elastic expansion head abuts against the inner wall of the salivary gland pipeline all the time, the elastic expansion head is pulled outwards through the connecting rod, and in the process that the elastic expansion head moves towards the outlet of the salivary gland pipeline, the elastic expansion head is pulled outwards. And the calculus can be pushed out regardless of size, so that the efficiency of removing the calculus from the salivary gland pipeline is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of stone treatment device technology, specifically providing a salivary gland stone removal device and kit. Background Technology

[0002] Salivary gland stones, also known as sialolithiasis, are a common oral condition. They typically occur in the submandibular, parotid, and sublingual glands. These stones are formed by the deposition of minerals in saliva, which adhere and accumulate in the ducts of the salivary glands, obstructing saliva flow and causing pain and swelling.

[0003] Current techniques for removing stones from the posterior segment of the salivary gland ducts generally involve endoscopic basket retrieval. This involves first locating the stone using an endoscope, then using a basket to remove it. However, existing baskets are typically made of thin steel wire. The large holes in the wire basket make it unsuitable for smaller stones. Furthermore, the thin wire has low tensile strength, making it prone to breakage when removing larger stones. The broken wire tip can easily damage the inner wall of the salivary gland duct, causing secondary injury to the patient. Therefore, there is an urgent need for a device that can better remove stones from the salivary gland duct. Utility Model Content

[0004] This invention provides a stone removal device for stones in the salivary gland duct, which solves the problem that existing technologies using baskets for stone removal are ineffective and can easily cause harm to patients.

[0005] The technical solution of the utility model is as follows:

[0006] A salivary gland lithotripsy device includes a connecting rod and an elastic expansion head. One end of the connecting rod is connected to the elastic expansion head. The connecting rod is a flexible rod used to push and pull the elastic expansion head. The elastic expansion head has a compressed state and an open state. When the elastic expansion head is in the open state, its outer diameter is adapted to the inner diameter of the salivary gland duct. When the elastic expansion head is in the compressed state, it can slide in a guide tube.

[0007] In this solution, the elastic expansion head, similar to the basket in existing technology, shrinks and penetrates deep into the salivary gland duct through a guide tube. Once the depth exceeds the stone's location, the elastic expansion head extends and expands from the other end of the guide tube. In existing technology using a basket, after the basket retrieves the stone, it needs to return through the guide tube. If the stone is too large, it can block the guide tube, making the wires of the basket more prone to breakage. If the stone is small, the basket may not be able to retrieve it in one go, resulting in very low efficiency. However, the elastic expansion head in this solution, after compressing to the designated depth in the salivary gland duct, can withdraw the guide tube. The expansion head expands due to its own elasticity, ensuring its outer diameter always remains against the inner wall of the salivary gland duct. By pulling the elastic expansion head outward via a connecting rod, it moves towards the salivary gland duct outlet, pushing out stones of all sizes, effectively improving the efficiency of stone retrieval from the salivary gland duct. Meanwhile, because the elastic expansion head itself is elastic, it conforms radially to the inner wall of the salivary gland, resulting in low pressure on the gland wall and greatly reducing the risk of damage during sliding. Furthermore, the elastic expansion head automatically adapts to the salivary gland ducts of different patients within a certain diameter range, improving the device's adaptability and convenience.

[0008] Preferably, the elastic expansion head has a conical structure.

[0009] In this design, the elastic expansion head can be better compressed when inserted into the guide tube, and it is also easier to push it towards the tip of the cone. When unfolded, the bottom edge of the conical structure can better fit the inner wall of the salivary gland duct. At the same time, when sliding out the stone, the conical structure design makes the bottom edge bear better force, making it easier to push the stone off the inner wall.

[0010] Preferably, the conical surface of the elastic expansion head is provided with a hole extending to the bottom.

[0011] In this design, as the elastic expansion head expands, its outer diameter will conform to the inner wall of the salivary gland duct. When the elastic expansion head is completely in contact with the inner wall radially, pulling the elastic expansion head will create negative pressure on the inner wall of the salivary gland duct, making it difficult to pull the elastic expansion head. Therefore, this design incorporates a through hole in the elastic expansion head to connect the spaces at both ends, preventing negative pressure from forming in the salivary gland duct.

[0012] Preferably, the bottom of the elastic expansion head is provided with an arc-shaped groove, and the connecting rod is located at the center of the arc-shaped groove.

[0013] In this design, as the elastic expansion head pushes the stone outward, the stone can be concentrated in the arc-shaped groove, avoiding rolling contact between the stone and the inner wall of the salivary gland. At the same time, the connecting rod is set in the center of the arc-shaped groove, ensuring that the elastic expansion head is evenly stressed when the connecting rod is pulled, so that the elastic expansion head remains stable as it is pulled out along the salivary gland duct.

[0014] Since the salivary gland duct is not a straight tube, preferably, the connecting rod includes a wire portion, which consists of a steel wire and a silicone layer wrapping the steel wire. Therefore, in this design, the wire portion, supported by the steel wire, can conform to the direction of the catheter and produce a certain degree of bending when sliding in the guide tube and salivary gland duct, making the elastic expansion head slide more smoothly during insertion and withdrawal, further ensuring the stability of the elastic expansion head sliding in the catheter.

[0015] Preferably, the connecting rod further includes an expansion head mounting part, the expansion head mounting part includes a connecting rod, the connecting rod is disposed through the elastic expansion head, and one end of the connecting rod near the bottom of the elastic expansion head is fixedly connected to the steel wire part.

[0016] In this design, by setting a connecting rod inside the elastic expansion head, it is easier to fix the connecting rod and the elastic expansion head, and it can also better transfer the thrust and tension on the connecting rod to the elastic expansion head, reducing the degree of deformation of the elastic expansion head under stress.

[0017] Because the elastic expansion head itself has elasticity, it will be squeezed when it comes into contact with the inner wall of the salivary gland, which may cause the holes on the conical surface to be blocked. To deal with this situation, preferably, the connecting rod is a hollow tube, and the tube wall of the connecting rod near the steel wire part is provided with a through hole that connects to the inside of the hollow tube.

[0018] By making the connecting rod a hollow tube, the connecting rod itself becomes a ventilated cavity. Since the connecting rod itself has a certain strength, it will not be squeezed or deformed by the elastic expansion head, thus ensuring that there are always vent holes connecting the two ends of the elastic expansion head.

[0019] Preferably, the bottom edge of the elastic expansion head is provided with a rounded chamfer.

[0020] In this design, by adding a rounded chamfer to the bottom edge of the elastic expansion head, the thickness of the contact area between the elastic expansion head and the inner wall of the salivary gland duct is increased. This prevents stones from adhering too firmly to the inner wall of the salivary gland, as the outer wall of the elastic expansion head deforms when pushing the stone, causing it to be missed. Simultaneously, the rounded chamfer further reduces friction between the elastic expansion head and the inside of the salivary gland duct, thus preventing the elastic expansion head from scratching the inner wall of the salivary gland duct during movement.

[0021] A salivary gland stone removal kit includes a salivary gland stone removal device and a guide tube. An elastic expansion head is movably disposed within the guide tube. The rear end of a connecting rod extends out of the guide tube. The connecting rod is used to push the elastic expansion head along the guide tube. When the elastic expansion head slides out of the guide tube, it automatically opens and adapts to the salivary gland duct. The guide tube provides a channel for the salivary gland stone removal device to slide within the salivary gland duct, allowing the elastic expansion head to enter the duct in a compressed state. This avoids affecting the position of the target stone when pushing in the elastic expansion head, preventing the stone from being unable to be expelled when the elastic expansion head is subsequently pulled out.

[0022] Preferably, the guide tube is an endoscopic catheter.

[0023] The beneficial effects of this utility model are:

[0024] This invention utilizes a salivary gland stone removal device in conjunction with a guide tube. Once the elastic expansion head reaches the designated depth within the salivary gland duct, the guide tube is withdrawn. The elastic expansion head expands due to its own elasticity, ensuring its outer diameter remains in contact with the inner wall of the salivary gland duct. A connecting rod pulls the elastic expansion head outwards, allowing it to move towards the duct outlet and expel stones of all sizes, effectively improving the efficiency of salivary gland stone removal. Simultaneously, because the elastic expansion head is elastic and conforms radially to the inner wall of the salivary gland, the pressure on the inner wall is low, greatly reducing the risk of damage during sliding. Furthermore, the elasticity of the expansion head allows it to automatically adapt to different patients' salivary gland ducts within a certain diameter range, enhancing the device's adaptability and convenience. Attached Figure Description

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. 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.

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 This is a schematic diagram of the present invention extending into the salivary gland duct;

[0028] Figure 3 This is a schematic diagram illustrating the present invention for pulling out the salivary gland duct;

[0029] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle.

[0030] In the above figures, the corresponding reference numerals are as follows:

[0031] 1-Guide tube, 2-Connecting rod, 21-Steel wire part, 211-Steel wire, 212-Silicone layer, 22-Expanding head mounting part, 221-Connecting rod, 222-Through hole, 223-Skeleton, 23-Anti-slip handle, 3-Elastic expanding head, 31-Hole, 32-Arc-shaped groove, 4-Salivary gland duct, 5-Stone. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0033] Example 1:

[0034] like Figures 1 to 3 The device shown includes a salivary gland lithotripsy device, comprising an elastic expansion head 3 connected by a connecting rod 2, a guide tube 1 that can be inserted into a salivary gland duct 4, and the device then sliding from the guide tube 1 into the salivary gland duct 4. The elastic expansion head 3 can slide within the guide tube 1 after being compressed, and its outer diameter, when unfolded, matches the inner diameter of the salivary gland duct 4.

[0035] Specifically, the elastic expansion head 3 is preferably made of medical silicone in a conical shape. The direction of the cone tip is the same as the direction in which the elastic expansion head 3 extends into the guide tube 1. The bottom of the elastic expansion head 3 is provided with an arc-shaped groove 32, and the connecting rod 2 is located at the center of the arc-shaped groove 32.

[0036] In this embodiment, after the elastic expansion head 3 reaches the designated depth of the salivary gland duct 4, the guide tube 1 can be withdrawn. Due to its own elasticity, the elastic expansion head 3 expands, ensuring its outer diameter always abuts against the inner wall of the salivary gland duct 4. By pulling the elastic expansion head 3 outward via the connecting rod 2, it moves towards the outlet of the salivary gland duct 4, displacing stones 5 regardless of size, effectively improving the efficiency of stone removal from the salivary gland duct 4. Simultaneously, because the elastic expansion head 3 possesses its own elasticity, it radially conforms to the inner wall of the salivary gland, reducing the pressure on the inner wall and greatly minimizing the risk of damage during sliding. Furthermore, the elastic expansion head 3 can automatically adapt to different diameter salivary gland ducts 4 in different patients without external force, improving the device's adaptability and convenience.

[0037] When the guide tube 1 is inserted during compression, the cone-shaped elastic expansion head 3 has its cone tip aligned with the insertion direction, allowing it to slide more effectively into the guide tube 1 to the designated depth. During expansion, the cone bottom better conforms to the inner wall of the salivary gland duct 4. Simultaneously, when the stone 5 is slid out, the cone-shaped design ensures better force distribution at the bottom edge, making it easier to push the stone 5 off the inner wall. The stone 5 receives thrust and concentrates it in the arc-shaped groove 32, preventing rolling contact between the stone 5 and the inner wall of the salivary gland. Furthermore, the connecting rod 2 is positioned at the center of the arc-shaped groove 32, ensuring uniform force distribution on the elastic expansion head 3 when it is pulled, thus maintaining a stable posture as the elastic expansion head 3 is pulled out along the salivary gland duct 4.

[0038] Furthermore, such as Figure 2 and Figure 3 The connecting rod 2 shown includes a wire section 21, which consists of a steel wire 211 and a silicone layer 212 wrapping the steel wire 211. The wire section 21 gives the connecting rod 2 a certain bending ability. The front and rear ends of the wire section 21 are respectively connected to the expansion head mounting part 22 and the handle part. The expansion head mounting part 22 includes a connecting rod 221, which is inserted through the elastic expansion head 3. The end of the connecting rod 221 near the bottom of the elastic expansion head 3 is fixedly connected to the wire section 21. By setting the connecting rod 221 inside the elastic expansion head 3 and setting the skeleton 223 on the connecting rod 221, it is convenient to fix the connecting rod 2 and the elastic expansion head 3. At the same time, it can better transmit the thrust and tension on the connecting rod 2 to the elastic expansion head 3, so that the elastic expansion head 3 transmits force evenly in all directions, avoiding deformation caused by uneven force on the elastic expansion head 3. The handle is a non-slip handle 23, which can effectively pull out the elastic expansion head 3 that is deep inside the salivary gland duct 4 to prevent slippage. The maximum diameter of the non-slip handle 23 is smaller than the inner diameter of the guide tube 1.

[0039] In this embodiment, the bottom edge of the elastic expansion head 3 is provided with a rounded chamfer. By providing a rounded chamfer at the bottom edge of the elastic expansion head 3, the thickness of the contact portion between the elastic expansion head 3 and the inner wall of the salivary gland duct 4 can be increased. If the stone 5 is too firmly adhered to the inner wall of the salivary gland, the elastic expansion head 3, with its sufficient thickness, can prevent the outer wall from deforming and thus avoid missing the stone 5 when pushing it. At the same time, the rounded chamfer further reduces the friction between the elastic expansion head 3 and the inside of the salivary gland duct 4, thereby preventing the elastic expansion head 3 from scratching the inner wall of the salivary gland duct 4 during movement.

[0040] Example 2:

[0041] Based on the first embodiment, Figure 4As shown, the conical surface of the elastic expansion head 3 has a hole 31 extending to the bottom. Since the outer diameter of the elastic expansion head 3 will fit against the inner wall of the salivary gland duct 4 when it expands, pulling the elastic expansion head 3 may create negative pressure on the inner wall of the salivary gland duct 4, making it difficult to pull the elastic expansion head 3. Therefore, this solution provides a through hole 222 on the elastic expansion head 3 to connect the spaces at both ends of the elastic expansion head 3, preventing negative pressure from forming in the salivary gland duct.

[0042] Specifically, the steel wire part 21 supported by the steel wire 211 can bend to conform to the direction of the catheter when sliding in the guide tube 1 and the salivary gland duct 4, so that the elastic expansion head 3 can slide more smoothly during insertion and withdrawal, and further ensure the stability of the elastic expansion head 3 sliding in the catheter.

[0043] Furthermore, since the elastic expansion head 3 itself is elastic, it will be compressed when it comes into contact with the inner wall of the salivary gland, which may block the holes 31 on the conical surface. To address this, the connecting rod 221 is made of a hollow tube, and a through hole 222 connecting the inside of the hollow tube is provided on the tube wall of the connecting rod 221 near the steel wire part 21. Since the connecting rod 221 itself is preferably made of medical-grade PC material, it has a certain strength and will not be deformed by the compression of the elastic expansion head 3, thus ensuring that there are always vent holes connecting the two ends of the elastic expansion head 3.

[0044] Example 3:

[0045] like Figure 2 The illustrated salivary gland stone removal kit includes a salivary gland stone removal device as shown in Embodiments 1 and 2, and further includes a guide tube 1. An elastic expansion head 3 is movably disposed within the guide tube 1. The rear end of a connecting rod 2 extends out of the guide tube 1. The connecting rod 2 is used to push the elastic expansion head 3 along the guide tube 1. When the elastic expansion head 3 slides out of the guide tube 1, it automatically opens and adapts to the salivary gland duct. The guide tube 1 first extends into the salivary gland duct to guide the elastic expansion head 3 into the target position of the salivary gland duct 4. The guide tube 1 is preferably an endoscopic catheter. After the location of the stone is determined using an endoscope, the endoscope is withdrawn, and the elastic expansion head 3 can be inserted into the salivary gland duct 4 using the endoscopic catheter, thereby improving the overall efficiency of stone removal.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A salivary gland lithotripsy device, characterized in that: It includes a connecting rod (2) and an elastic expansion head (3). One end of the connecting rod (2) is connected to the elastic expansion head (3). The connecting rod (2) is a flexible rod used to push and pull the elastic expansion head (3). The elastic expansion head (3) includes a compressed state and an open state. When the elastic expansion head (3) is in the open state, its outer diameter is adapted to the inner diameter of the salivary gland duct. When the elastic expansion head (3) is in the compressed state, the elastic expansion head (3) can slide in the guide tube.

2. The salivary gland lithotomy device according to claim 1, characterized in that: The elastic expansion head (3) has a conical structure.

3. The salivary gland lithotomy device according to claim 2, characterized in that: The surface of the elastic expansion head (3) is provided with a hole (31) extending to the bottom.

4. The salivary gland lithotomy device according to claim 3, characterized in that: The bottom of the elastic expansion head (3) is provided with an arc-shaped groove (32), and the connecting rod (2) is located at the center of the arc-shaped groove (32).

5. The salivary gland lithotripsy device according to claim 4, characterized in that: The connecting rod (2) includes a wire portion (21), which is composed of a wire (211) and a silicone layer (212) that wraps the wire (211).

6. The salivary gland lithotomy device according to claim 5, characterized in that: The connecting rod (2) also includes a head mounting part (22), which includes a connecting rod (221). The connecting rod (221) is disposed through the elastic head (3), and one end of the connecting rod (221) near the bottom of the elastic head (3) is fixedly connected to the wire part (21).

7. The salivary gland lithotomy device according to claim 6, characterized in that: The connecting rod (221) is a hollow tube, and a through hole (222) is provided on the tube wall of the connecting rod (221) near the steel wire part (21) to communicate with the interior of the hollow tube.

8. A salivary gland lithotomy device according to any one of claims 1 to 7, characterized in that: The bottom edge of the elastic expansion head (3) is provided with a rounded chamfer.

9. A salivary gland lithotripsy kit, characterized in that: The device for removing stones from salivary glands according to any one of claims 1 to 8 further includes a guide tube (1), the elastic expansion head (3) is movably disposed in the guide tube (1), the rear end of the connecting rod (2) extends out of the guide tube (1), the connecting rod (2) is used to push the elastic expansion head (3) to move along the guide tube (1), and when the elastic expansion head (3) slides out of the guide tube (1), the elastic expansion head (3) automatically opens and adapts to the salivary gland duct.

10. A salivary gland lithotomy kit according to claim 9, characterized in that: The guide tube (1) is an endoscopic catheter.

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