Sacral canal cyst transdermal puncture drainage device

Abstract

The sacral canal cyst transdermal puncture drainage device comprises a hydrops box and a drainage tube, one end of the drainage tube is closed, the closed end is fixedly connected with a fixing head made of a memory alloy material, the fixing head is used for fixing the drainage tube in a cyst, and the other end of the drainage tube is connected with the hydrops box through a connector assembly; the closed end of the drainage tube is provided with a hydrops through hole for enabling cyst hydrops to enter a tube cavity of the drainage tube, the hydrops box is provided with a hydrops cavity communicated with the tube cavity of the drainage tube, and the upper end of the hydrops cavity is sealed by a puncturable rubber pad. The sacral canal cyst can be conservatively treated, the hydrops box is embedded under the subcutaneous fascia layer of the hip of a patient through an operation, the drainage tube is implanted into subcutaneous tissue through the puncture needle, the closed end of the drainage tube is guided into the sacral canal root cyst, and the drainage tube expands when encountering body temperature and is fixed in the cyst. After an operation, percutaneous puncture is carried out to a hydrops cavity, and liquid in the cyst is extracted, so that the internal capacity and pressure of the cyst are reduced, and sacral neuralgia caused by the cyst is relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a transcutaneous puncture drainage device for sacral canal cysts. Background Art

[0002] The incidence rate of sacral canal cysts is very high. According to statistics, it can reach 10%-20% in the current general population, and 10% of the population has symptoms. Common symptoms include low back pain, sacrococcygeal pain, numbness and pain in the perineum (perianal area, vulva and its surrounding areas) and the root of the thigh. Even, some people may be affected in sexual function, with constipation or dysuria, and in severe cases, the pain may affect other parts of the lower limbs.

[0003] The current mainstream treatment method for sacral canal cysts is to remove the cysts by surgery. However, in the actual treatment process, the postoperative recurrence rate is relatively high, and surgery cannot be performed again, and the patient will suffer pain for life due to recurrence. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a transcutaneous puncture drainage device for sacral canal cysts.

[0005] For this purpose, the technical solution adopted by the present invention is as follows:

[0006] A transcutaneous puncture drainage device for sacral canal cysts, including a liquid collection box and a drainage tube. One end of the drainage tube is closed, and a fixing head made of a shape memory alloy material is fixedly connected to the closed end. The fixing head is used to fix the drainage tube in the cyst. The other end of the drainage tube is connected to the liquid collection box through a joint assembly. The closed end of the drainage tube is provided with a liquid accumulation through hole for allowing the cyst fluid to enter the lumen of the drainage tube. The liquid collection box is provided with a liquid accumulation cavity communicating with the lumen of the drainage tube, and the upper end of the liquid accumulation cavity is sealed by a puncturable rubber pad.

[0007] Further, the liquid collection box includes a base, an upper cover and a rubber pad. Both the base and the upper cover are made of a shape memory alloy material. A circular liquid accumulation cavity is provided at the center of the base. The upper cover is provided with a central through hole communicating with the circular liquid accumulation cavity. The upper cover and the base are ultrasonically welded. The rubber pad is press-fitted into the central through hole of the upper cover, and its lower end is hermetically inserted into the circular liquid accumulation cavity.

[0008] Adopting the above technical solution enables the liquid collection box to be safely embedded in the human body without deformation, affecting the liquid collection effect. The rubber pad can be punctured multiple times to extract the liquid, and no liquid leakage will occur.

[0009] Further, the top surface of the base is a plane. The circumferential side wall of the circular liquid accumulation cavity protrudes upward to form a frustum connecting portion. The lower end of the upper cover is sleeved on the frustum connecting portion. The bottom surface of the upper cover is hermetically connected to the top surface of the base. The outer side surface of the upper cover and the outer side surface of the base are connected as a smooth curved surface.

[0010] By adopting the above technical solution, the sealing effect of the liquid accumulation cavity is good, and no leakage occurs. The side shapes of the upper cover and the base are smooth curved surfaces that will not scratch human skin.

[0011] Furthermore, the upper cover and the base are connected to form an irregular truncated cone with a small top and a large bottom. The top surface of the base is provided with a positioning hole, and the bottom surface of the upper cover is provided with a positioning protrusion, which is plugged into the positioning hole. The positioning protrusion and the positioning hole cooperate to ensure a smooth connection between the side of the upper cover and the side of the base.

[0012] Furthermore, the bottom surface of the rubber pad is provided with an annular groove A, and the top surface of the truncated cone connecting portion is provided with an annular protrusion A, which is engaged with the annular groove A. The top surface of the rubber pad is provided with an annular groove B, and the upper end of the side wall of the upper cover is bent inwardly and inserted into the annular groove B, thereby ensuring the sealing effect of the rubber pad.

[0013] Furthermore, the fixing head is a sleeve, which is fixedly sleeved between the closed end of the drainage tube and the fluid accumulation through hole, and the side wall of the sleeve is provided with a plurality of claws which open when encountering body temperature.

[0014] Furthermore, the joint assembly includes a threaded joint and a pipe joint. A threaded portion is provided at the rear end of the base, and a stepped through hole communicating with the fluid accumulation chamber is provided in the threaded portion. One end of the pipe joint is pre-buried in the stepped through hole, and the other end is inserted into the drainage tube. The threaded joint seal passes through the drainage tube and is connected to the threaded portion of the base.

[0015] By adopting the above technical solution, the drainage tube and the pipe joint are sealed and connected in a detachable manner, and the drainage tube and the base are sealed and connected in a detachable manner.

[0016] Furthermore, one end of the threaded joint is provided with an internal threaded hole that cooperates with the thread of the threaded part, and the other end is provided with a smooth circular hole that cooperates with the drainage tube. The end of the internal threaded hole away from the smooth circular hole is provided with an annular groove with an enlarged diameter, and the inlet end of the annular groove is provided with an annular protrusion C with a semicircular cross-section. The end of the threaded part close to the effusion cavity is provided with an annular protrusion B with a semicircular cross-section, and the maximum diameter of the annular protrusion B is smaller than the inner diameter of the annular groove and larger than the minimum diameter of the annular protrusion C.

[0017] By adopting the above technical solution, the annular protrusion B of the threaded part of the base can be clamped in the annular groove of the threaded joint, preventing the threaded joint from loosening and reducing the effect of sealing the connection between the drainage tube and the base.

[0018] Furthermore, one end of the pipe joint connected to the drainage tube is configured as a conical end, so as to facilitate the insertion of the drainage tube and the pipe joint, and the drainage tube is expanded through the conical end to be sealed and connected with the threaded joint.

[0019] Furthermore, the other end of the pipe joint is provided with a cylindrical portion with an enlarged diameter, and the cylindrical portion is adapted to the large hole of the stepped through hole of the base threaded portion. The cylindrical portion is used for limiting to prevent the pipe joint from being separated from the base.

[0020] Advantages of the present invention: The present invention can conservatively treat sacral canal cysts. An effusion box is buried under the subcutaneous fascia layer of the patient's buttocks through surgery. A drainage tube is implanted into the subcutaneous tissue through a puncture needle, and the closed end of the drainage tube is guided into the sacral nerve root cyst. The fixing head made of shape memory alloy material expands when encountering body temperature, fixing the drainage tube in the cyst. After the operation, percutaneous puncture is performed to the effusion cavity, and the liquid in the cyst is aspirated to reduce the volume and pressure of the cyst and relieve the sacral neuralgia caused by the cyst. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the transcutaneous puncture drainage device for sacral canal cysts of the present invention.

[0022] Figure 2 is Figure 1 exploded view of.

[0023] Figure 3 is Figure 1 cross-sectional view of.

[0024] Figure 4 is a cross-sectional structural diagram of the threaded joint of the present invention. Detailed Embodiment

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings and a preferred embodiment.

[0026] Refer to Figures 1 to 3 , this embodiment provides a transcutaneous puncture drainage device for sacral canal cysts, including an effusion box, a joint assembly 40 and a drainage tube 50. The effusion box includes a base 10, an upper cover 20 and a rubber pad 30. The drainage tube 50, the base 10 and the upper cover 20 are all made of shape memory alloy material.

[0027] The base 10 and the upper cover 20 are connected into an irregular frustum shape with a smaller upper part and a larger lower part. As in this embodiment, the cross-section of the irregular frustum is triangular, and the corners of the triangle are arc parts; the side surface of the irregular frustum is S-shaped.

[0028] The bottom surface and the top surface of the base 10 are triangular parallel planes, and the three corners of the triangle are all set as arcs. The area of the top surface is smaller than that of the bottom surface, and the top surface and the bottom surface are connected by a convex arc-shaped side surface A. A circular liquid accumulation cavity 11 penetrating the top surface is provided at the central part of the base 10. A frustum connecting part 111 is formed by the upward protrusion of the circumferential side wall of the circular liquid accumulation cavity 11. An annular protrusion A1111 protrudes axially inward from the inner side of the top surface of the frustum connecting part 111; three mounting through holes 13 penetrating the side surface and the bottom surface are respectively provided at the three corners of the base. The base is fixed under the subcutaneous fascia layer of the buttocks by installing fasteners in the three mounting through holes 13. A threaded part 12 is provided at the middle part of the rear end of the base 10. The threaded part 12 protrudes radially outward from the middle part of the rear side surface of the base. An external thread is provided at one end of the threaded part 12 away from the liquid accumulation cavity, and an annular protrusion B121 with a semicircular cross section is provided at one end close to the liquid accumulation cavity. A stepped through hole communicating with the circular liquid accumulation cavity 11 is axially provided in the threaded part 12.

[0029] The shape of the bottom surface of the upper cover 20 is exactly the same as that of the top surface of the base 10. The top surface of the upper cover 20 is smaller than its bottom surface, and the top surface and the bottom surface are connected by a concave arc-shaped side surface B. A central through hole 21 penetrating its top surface and bottom surface is provided at the central part of the upper cover 20. The inner diameter of the central through hole 21 is equal to the outer diameter of the frustum connecting part 111. The upper end of the upper cover 20 is bent towards the central through hole 21 to form an annular buckle 23. The lower end of the upper cover 20 is sleeved outside the frustum connecting part 111 of the base through its central through hole 21. The bottom surface of the upper cover is in complete contact with the top surface of the base, and the arc-shaped side surface B and the arc-shaped side surface A are connected to form an S-shaped side surface of an irregular frustum. In order to achieve precise positioning during installation, a positioning hole 14 is provided on the top surface of the base 10, and a positioning protrusion 22 is provided on the bottom surface of the upper cover 20. The positioning protrusion 22 is inserted into the positioning hole 14. After the upper cover 20 and the base 20 are connected, the contact surface is welded by ultrasonic waves.

[0030] The rubber pad 30 is in the shape of a flat cylinder, and its outer diameter is slightly larger than the inner diameter of the central through hole 21 of the upper cover, so that when it is press-fitted into the upper cover, it can be in close contact with the upper cover 20 to seal the gap between the rubber pad and the upper cover. An annular groove A31 is provided on the bottom surface of the rubber pad 30, and the annular groove A31 is adapted to the annular protrusion A1111 of the frustum connecting part 111 of the base; an annular groove B32 is provided on the top surface, and the annular groove B32 is adapted to the annular buckle 23 of the upper cover 20. When the rubber pad 30 is press-fitted into the upper cover 20, the annular groove A31 is engaged with the annular protrusion A1111, and the annular groove B32 of the rubber pad is engaged with the annular buckle 23, thereby realizing the sealed connection between the upper cover 20 and the base 10 and the sealing of the open end of the circular liquid accumulation cavity 11 of the base.

[0031] One end of the drainage tube 50 is closed and the other end is open. A fixing head (not shown in the figure) made of shape memory alloy material is fixedly connected thereto. The closed end of the drainage tube is provided with a liquid accumulation through hole 51 for allowing the cyst effusion to enter the lumen 501 of the drainage tube. In this embodiment, a total of 8 through holes are provided. The fixing head is arranged between the end of the closed end of the drainage tube and the liquid accumulation through hole 51. Specifically, when implemented, the material of the drainage tube can be silicone, polyvinyl chloride (PVC), polyurethane, silicone impregnated with antibiotics, etc. The fixing head can be formed as a sleeve. The inner diameter of the sleeve is smaller than the outer diameter of the drainage tube. The sleeve is fixedly sleeved on the drainage tube by deforming the drainage tube. The side wall of the sleeve is provided with a plurality of claws that can be opened. The claws are formed by cutting the side wall of the sleeve, and the claws open and close towards the closed end of the drainage tube. After the drainage tube and the fixing head are implanted into the human body, the claws open due to heat and fix the drainage tube in the cyst. The cyst effusion flows into the lumen 501 through the liquid accumulation through hole 51.

[0032] The joint assembly 40 includes a threaded joint 41 and a pipe joint 42. Both the threaded joint 41 and the pipe joint 42 are made of shape memory alloy material.

[0033] The central part of the threaded joint 41 is axially provided with four-step through holes with gradually decreasing diameters, namely a first round hole 411, a second round hole 412, a third round hole 413, and a fourth round hole 414. The inner side surface of the inlet end of the first round hole 411 radially protrudes inwards to form an annular protrusion C4111 with a semi-circular cross-section. The inner diameter of the inner circle of the annular protrusion C4111 is smaller than the outer diameter of the base annular protrusion B121, and the diameter of the first round hole 411 is larger than the outer diameter of the base annular protrusion B121. The second round hole 412 is provided with an internal thread that is in threaded fit with the base thread portion 20. The diameter of the fourth round hole 414 is in interference fit with the outer diameter of the drainage tube 50.

[0034] The central part of the pipe joint 42 is axially provided with a liquid accumulation channel for connecting the drainage tube 50 and the base circular liquid accumulation cavity 11. One end of the pipe joint 42 is provided with a conical portion 421 that fits with the conical hole 52 at the open end of the drainage tube 50, and the other end is provided with a cylindrical portion 422 with an enlarged diameter. The cylindrical portion 422 is adapted to the large hole of the stepped through hole of the base thread portion 12.

[0035] One end of the pipe joint 42 with a cylindrical portion is embedded in the stepped through-hole of the threaded portion 12, and the liquid accumulation channel is connected to the circular liquid accumulation cavity 11; one end of the pipe joint 42 with a conical portion 421 extends out of the stepped through-hole of the threaded portion 12 and is inserted into the conical hole 52 at the open end of the drainage tube 50. The threaded joint 41 is sleeved from the closed end of the drainage tube, so that the internal thread of the threaded joint 41 is threadedly connected to the external thread of the base threaded portion 12. When the external thread portion of the base threaded portion 12 is fully screwed into the second round hole 412 of the threaded joint 41, the annular protrusion B121 of the threaded portion 12 passes over the annular protrusion C4111 of the threaded joint 41 and enters the first round hole 411. The conical portion 421 of the pipe joint 42 and the conical hole 52 of the drainage tube 50 are accommodated in the fourth round hole 414 of the threaded joint 41, and the open end of the drainage tube 50 is pressed by the threaded joint 41 against the conical portion 421 of the pipe joint 42, thereby realizing the sealed connection between the drainage tube and the pipe joint 42 and the sealed connection between the pipe joint and the base threaded portion 12.

[0036] When the present invention is used, the liquid accumulation box is buried under the subcutaneous fascia layer of the patient's buttocks through surgery, the drainage tube 50 is implanted into the subcutaneous tissue through a puncture needle, and the closed end of the drainage tube is guided into the sacral nerve root cyst. The drainage tube 50 expands when encountering body temperature and is fixed in the cyst. After the operation, the liquid in the cyst enters the lumen 501 of the drainage tube 50 through the through-hole 51, and successively flows through the lumen 501 and the pipe joint 42 into the circular liquid accumulation cavity 11; a puncture needle is used to puncture the rubber pad 30 through the skin to the circular liquid accumulation cavity 11, and the liquid in the cyst is extracted to reduce the volume and pressure of the cyst content and relieve the sacral neuralgia caused by the cyst.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also within the protection scope of the present invention.

Claims

1. A percutaneous puncture drainage device for sacral canal cysts, characterized in that, include: A fluid collection box and a drainage tube, wherein one end of the drainage tube is closed, and a fixing head made of a memory alloy material is fixedly connected to the closed end, the fixing head is used to fix the drainage tube in the cyst, and the other end of the drainage tube is connected to the fluid collection box through a joint assembly; the closed end of the drainage tube is provided with a fluid collection hole for allowing the cystic fluid to enter the drainage tube cavity, the fluid collection box is provided with a fluid collection cavity connected to the drainage tube cavity, and the upper end of the fluid collection cavity is sealed by a puncturable rubber pad.

2. The percutaneous puncture drainage device for sacral canal cyst according to claim 1, characterized in that, The liquid accumulation box includes a base, an upper cover and a rubber pad. The base and the upper cover are both made of memory alloy material. A circular liquid accumulation cavity is provided at the center of the base, and a central through hole connecting the circular liquid accumulation cavity is provided at the upper cover. The upper cover and the base are ultrasonically welded, and the rubber pad is pressed into the central through hole of the upper cover, and its lower end is sealed and inserted into the circular liquid accumulation cavity.

3. The percutaneous puncture drainage device for sacral canal cysts according to claim 2, characterized in that, The top surface of the base is a plane, and the circumferential side wall of the circular liquid accumulation cavity protrudes upward to form a truncated cone connecting portion. The lower end of the upper cover is sleeved on the truncated cone connecting portion, the bottom surface of the upper cover is sealedly connected to the top surface of the base, and the outer side surface of the upper cover is connected to the outer side surface of the base to form a smooth curved surface.

4. The percutaneous puncture drainage device for sacral canal cysts according to claim 3, characterized in that, The upper cover and the base are connected to form an irregular truncated cone shape with a small upper part and a large lower part. A positioning hole is arranged on the top surface of the base, and a positioning protrusion is arranged on the bottom surface of the upper cover. The positioning protrusion is plugged into the positioning hole.

5. The percutaneous puncture drainage device for sacral canal cyst according to claim 3, wherein, The bottom surface of the rubber pad is provided with an annular groove A, and the top surface of the truncated cone connecting part is provided with an annular protrusion A, which is engaged with the annular groove A; the top surface of the rubber pad is provided with an annular groove B, and the upper end of the upper cover side wall is bent inward and inserted into the annular groove B.

6. The percutaneous puncture drainage device for sacral canal cyst according to claim 1, wherein The fixed head is a sleeve fixedly sleeved between the closed end of the drainage tube and the effusion through hole, and the side wall of the sleeve is provided with a plurality of claws which are opened when encountering body temperature.

7. A percutaneous puncture drainage device for sacral canal cysts according to claim 1, characterized in that, The joint assembly includes a threaded joint and a pipe joint. A threaded portion is provided at the rear end of the base. A stepped through hole communicating with the fluid accumulation cavity is provided in the threaded portion. One end of the pipe joint is pre-buried in the stepped through hole, and the other end is inserted into the drainage tube. The threaded joint seal passes through the drainage tube and is connected to the threaded portion of the base.

8. A transdermal puncture drainage device for sacral canal cysts according to claim 7, characterized in that, One end of the threaded joint is provided with an internal threaded hole that cooperates with the thread of the threaded part, and the other end is provided with a smooth round hole that cooperates with the drainage tube. The end of the internal threaded hole away from the smooth round hole is provided with an annular groove with an enlarged diameter, and the inlet end of the annular groove is provided with an annular protrusion C with a semicircular cross-section. The end of the threaded part close to the effusion cavity is provided with an annular protrusion B with a semicircular cross-section, and the maximum diameter of the annular protrusion B is smaller than the inner diameter of the annular groove and larger than the minimum diameter of the annular protrusion C.

9. The percutaneous puncture drainage device for sacral canal cyst according to claim 7, wherein One end of the pipe joint connected to the drainage pipe is arranged as a conical end.

10. A percutaneous puncture drainage device for sacral canal cysts according to claim 7, characterized in that, The other end of the pipe joint is provided with a cylindrical portion with an enlarged diameter, and the cylindrical portion is adapted to the large hole of the stepped through hole of the threaded portion of the base.

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