Puncture needle for Ommaya sac

Abstract

The utility model discloses a puncture needle for the Ommaya sac, relates to medical instrument field, including the needle body of hollow setting and be provided with the needle wing on the needle body, said needle body tail end is provided with the flexible pipe of communication, on the needle body is provided with the tube body of sleeve fit, the tube body front end is provided with the balloon and with the conical surface of needle body peripheral surface smooth joint, the needle wing is provided with the flexible pipe of communication, the tube body is provided with the balloon. An air injection channel communicated with the balloon is arranged on the tube body, a plug used for plugging the air injection channel is arranged at the tail end of the tube body, and the balloon has a first state in which the balloon is in a bulge shape when inflated and a second state in which the balloon is smoothly attached to the tube body after being deflated. The fixing device has the advantage of being good in fixing effect.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a puncture needle for an Ommaya sac. Background Technology

[0002] The Ommaya capsule is a fluid-filled sac implanted under the scalp. One end of the Ommaya capsule is connected to a puncture tube, which is inserted percutaneously into the lateral ventricle and capsule cavity during surgery. The capsule can withstand multiple punctures. Because the Ommaya capsule does not communicate with the outside world like external ventricular drainage tubes, it greatly reduces the chance of intracranial infection. Therefore, the Ommaya capsule is a surgical consumable widely used in neurosurgery. It can be used for temporary drainage of cerebrospinal fluid circulation in acute hydrocephalus, drainage of intraventricular hemorrhage, drainage of the ventricle or postoperative residual cavity after intraventricular tumor surgery, and even local perfusion chemotherapy after malignant tumor surgery.

[0003] In existing technologies, some puncture needles are fixed by external dressings, but the fixation effect is limited, and there is an urgent need for a puncture needle with better fixation effect. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a puncture needle for Ommaya sac with good fixation effect.

[0005] The technical solution adopted in this utility model is as follows: a puncture needle for an Ommaya sac, comprising a hollow needle body and needle wings disposed on the needle body, a connecting tube at the end of the needle body, two needle bodies in total, a 3M dressing disposed below the needle wings, a fitted tube on the needle body, a balloon at the front end of the tube and a conical surface smoothly connected to the circumference of the needle body, an inflation channel communicating with the balloon on the tube, a plug at the end of the tube for sealing the inflation channel, and the balloon having a first state of being bulging when inflated and a second state of being smoothly attached to the tube after deflation.

[0006] The needle body is bent at 90°.

[0007] The head of the needle is a beveled needle tip.

[0008] The end of the tubing is provided with a connector that connects all the needles, and the tubing is also provided with a flow stop clamp.

[0009] The balloon is made of medical-grade silicone and coated with an antibacterial coating.

[0010] The tube is marked with graduations to indicate the puncture depth.

[0011] The tube body is made of fluorinated ethylene propylene copolymer.

[0012] The beneficial effects of this utility model are: This technical solution, by fitting the tube body onto the needle body and providing a medical silicone balloon at the front end, allows air to be injected into the balloon through the air injection channel after the puncture needle is inserted into the Ommaya balloon. The balloon expands after inflation, which can prevent the puncture needle from detaching from the Ommaya balloon; it has the advantage of good fixation effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the puncture needle used for the Ommaya sac in an embodiment of the present invention.

[0014] Figure 2 This is a schematic diagram of the needle body and the tube body. Detailed Implementation

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0016] As shown in the figure, a puncture needle for an Ommaya sac includes a hollow needle body 1 and needle wings 2 on the needle body 1. A flexible tube 3 is connected to the end of the needle body 1. A fitted tube 4 is attached to the needle body 1. A balloon 5 and a conical surface 6 smoothly connected to the circumference of the needle body 1 are located at the front end of the tube 4. An inflation channel 7 is provided on the tube 4, connecting to the balloon 5. A plug 8 for sealing the inflation channel 7 is located at the end of the tube 4. The balloon 5 has a first state of being bulging when inflated and a second state of being smoothly attached to the tube 4 after deflation. This technical solution, by fitting the tube onto the needle body and providing a medical silicone balloon at the front end, allows inflation of the balloon through the inflation channel after the puncture needle is inserted into the Ommaya sac. The balloon expands after inflation, preventing the puncture needle from detaching from the Ommaya sac; it has the advantage of good fixation.

[0017] The needle body 1 is bent at 90°; the formed puncture needle with the bend eliminates the step of manually bending a straight needle and avoids the possibility of producing defective products due to bending failure (causing the puncture needle to break), thus improving medical efficiency.

[0018] The head of the needle body 1 is a beveled needle tip.

[0019] The number of needles 1 is two, and the two needles are close together, resulting in better fixation of the puncture needle. Furthermore, if one needle becomes blocked, drainage can be completed through the other needle, ensuring the stability of the drainage. In the diagram of this embodiment, the needle tips of the two needles are arranged side-by-side in actual application, not attached to each other. Figure 1 The opposite settings in the middle.

[0020] The needle wing 2 is provided with a 3M dressing 9, which is less likely to cause pressure sores and can also absorb the small amount of bleeding and exudate caused by puncture.

[0021] The end of the hose 3 is provided with a connector 10 that connects all needles 1. The hose 3 is also provided with a flow stop clamp 11, which can control the flow rate of the liquid in the hose.

[0022] The balloon 5 is made of medical-grade silicone and has an antibacterial coating on its surface.

[0023] The tube 4 is provided with scale markings (not shown) to indicate the puncture depth.

[0024] The tube body 4 is made of fluorinated ethylene propylene copolymer. The tube body usually requires precision machining when mounted on the needle body, such as injection molding or extrusion molding. In addition, in this embodiment, the tube body needs to be tightly bonded to the needle body, which requires the use of heat shrinking process or adhesive. At the same time, the tube body has an air injection channel, which needs to ensure the sealing and unobstructed flow of the channel, which can be achieved by microporous processing or multi-layer co-extrusion technology.

[0025] The balloon is made of medical-grade silicone, a material that can inflate and maintain its shape while remaining flat after deflation; it is also highly flexible and can be repeatedly inflated and deflated without rupturing.

[0026] The assembly process of the tubing and needle body adopts a heat shrink process, and the steps are as follows: 1. Put the heat shrink tubing (such as fluorinated ethylene propylene copolymer, FEP) on the needle body; 2. Heat to shrink the heat shrink tubing and fit it tightly against the surface of the needle body. This is suitable for low-cost or disposable puncture needles.

[0027] There are several methods for combining the balloon and the tubing.

[0028] Method 1, Laser Welding: Steps: 1. Pre-form the silicone balloon; 2. Use a laser welding machine to weld the edge of the balloon to the front end of the tube; 3. Inject air to test the seal.

[0029] Advantages of Method 1: Non-contact welding, avoiding material contamination.

[0030] Method 2, bonding process:

[0031] Materials: Medical-grade epoxy resin or cyanoacrylate adhesive;

[0032] Steps: 1. Apply adhesive to the front end of the tube; 2. Insert the balloon and apply pressure to cure.

[0033] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. A puncture needle for an Ommaya sac, comprising a hollow needle body (1) and needle wings (2) disposed on the needle body (1), wherein the end of the needle body (1) is provided with a communicating tubing (3), characterized in that: The number of needles (1) is two. A 3M patch (9) is provided below the needle wing (2). A tube (4) is provided on the needle (1) and fitted together. A balloon (5) is provided at the front end of the tube (4) and a conical surface (6) that is smoothly connected to the circumference of the needle (1). An air injection channel (7) is provided on the tube (4) to connect the balloon (5). A plug (8) for sealing the air injection channel (7) is provided at the end of the tube (4). The balloon (5) has a first state of being bulging when inflated and a second state of being smoothly attached to the tube (4) after deflation.

2. The puncture needle for Ommaya sac according to claim 1, characterized in that: The needle body (1) is bent at 90°.

3. The puncture needle for Ommaya sac according to claim 1, characterized in that: The head of the needle body (1) is a beveled needle tip.

4. The puncture needle for Ommaya sac according to claim 1, characterized in that: The end of the hose (3) is provided with a connector (10) that connects all needles (1), and the hose (3) is also provided with a flow stop clamp (11).

5. The puncture needle for Ommaya sac according to claim 1, characterized in that: The balloon (5) is made of medical-grade silicone and has an antibacterial coating on its surface.

6. The puncture needle for Ommaya sac according to claim 1, characterized in that: The tube (4) is provided with scale markings to indicate the puncture depth.

7. The puncture needle for Ommaya sac according to claim 1, characterized in that: The tube body is made of fluorinated ethylene propylene copolymer.

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