CN101485588A - Puncture needle for minimally invasive treatment - Google Patents

Abstract

The invention relates to a puncture needle for minimally invasive treatment, which includes a metal needle core and a soft sleeve, wherein: the metal needle core is inserted into the soft sleeve; the tail of the soft sleeve is a syringe connection part, and a plurality of Side piercing. The puncture needle for minimally invasive treatment of the present invention is convenient for indwelling, evenly administered, easy to operate and convenient for monitoring.

Description

Needle for minimally invasive therapy

technical field

The invention relates to a puncture needle, in particular to a minimally invasive treatment puncture needle capable of one-time puncture, multiple times and uniform administration.

Background technique

As an emerging discipline, interventional medicine uses precision instruments such as puncture needles, catheters, and guide wires for tissue collection, diagnosis, and local treatment of various lesions. It is intuitive, efficient, accurate, simple, minimally invasive, safe, and has few complications. And other characteristics, it has become the third largest therapeutic discipline with the same reputation as internal medicine and surgery. Ultrasound-guided injection in the treatment of trauma to abdominal parenchyma is a new concept of minimally invasive treatment, using contrast-enhanced ultrasound to guide the injection of hemostatic agent into the trauma focus to treat active bleeding. It has obtained definite curative effect, and its hemostasis and wound sealing effect are rapid and reliable, the equipment requirements are simple, the trauma is small, the method is easy to implement, the patient suffers less pain, the course of disease is short, and the complications are few, and repeated injection treatment can be repeated.

Existing medical puncture needles include common puncture needles (i.e. PTC needles) and catheter needles. PTC needles have beveled and flat-topped needle points, and catheter needles are made of plastic (polyethylene) catheters on the puncture needle tube overcoat. Existing puncture needles have different specifications according to their uses, and can be used for cytological biopsy, suction and drainage of cysts, abscesses, hematomas and serous cavity fluids, lavage, injection of drugs, as well as puncture and drainage of bile duct or renal pelvis, and X-ray contrast wait.

Although the existing puncture needles are designed in various types, there is no special needle for treatment injection, and if the existing needle is used for treatment injection, it has the following defects:

1. Most of the existing puncture needles are made of metal materials, which cannot be left in the body. Repeated puncture is required for multiple administrations, which increases the difficulty of treatment while suffering patients.

2. The existing soft cannula is difficult to use imaging to monitor its position in the body, and the indwelling tube usually needs a built-in guide wire and is used in conjunction with a skin expansion needle. The operation process is complicated and time-consuming, which is not conducive to the application of rapid first aid on the spot.

3. Existing puncture needles cannot complete the one-time treatment of larger area trauma focus, often needing multiple points and multiple punctures.

4. The existing puncture needles can be divided into single-hole needles and three-hole needles. The diameter and distribution of the needle holes have not been clinically studied according to the properties and concentrations of the injected drugs, and the hemostatic drugs for injection currently used in clinical Due to the characteristics of the above-mentioned needles, it is easy to cause local aggregation and poor diffusion of the drug when injecting the drug, thereby affecting the curative effect, and is not conducive to the degradation and absorption of the drug.

This shows that above-mentioned existing puncture needle obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved. How to create a new minimally invasive treatment puncture needle that is beneficial to puncture, effectively injects medicine, and is convenient to retain is one of the important research topics in the current art.

Contents of the invention

The purpose of the present invention is to overcome the defects of the existing puncture needles and provide a minimally invasive treatment puncture needle with a new structure. The technical problems to be solved are to make it easy to indwell, evenly administer the drug, easy to operate and easy to monitor. Therefore, it is more suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. A minimally invasive treatment puncture needle according to the present invention includes a metal needle core and a soft sleeve, wherein: the metal needle core is inserted into the soft sleeve; the tail of the soft sleeve is a syringe connection part, and a plurality of Side piercing.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

In the aforementioned puncture needle for minimally invasive treatment, the needle tip of the metal needle core protrudes from the soft sleeve, and the front end of the soft sleeve is slightly narrowed in diameter and slightly thinner, and covers part of the needle head of the metal needle core.

In the aforementioned puncture needle for minimally invasive treatment, the front end of the soft sleeve is fixedly connected with a metal needle point.

In the aforementioned puncture needle for minimally invasive treatment, the connecting end of the metal needle point has a double-layer structure, and a bump is provided between the double-layer structures, and the front end of the soft sleeve is clamped in the double-layer structure. The block is embedded in a soft sleeve.

In the aforementioned puncture needle for minimally invasive treatment, the metal needle core is tightly engaged with the metal needle tip of the soft sleeve in a manner of concave and convex, oblique engagement or plane contact.

As for the aforementioned puncture needle for minimally invasive treatment, the outer surface of the soft sleeve is provided with a coating and marked with a scale, and the tail is provided with a clamping device and a sealing cap; There are threads.

For the puncture needle for minimally invasive treatment, the metal needle core is 150cm-200cm long, the side perforation spacing of the soft sleeve is 8cm, 6cm, 4cm or 2cm, and the outer diameter of the needle tube is 20G-16G.

In the aforementioned puncture needle for minimally invasive treatment, the soft sleeve is a Y-shaped main and auxiliary tube structure.

As for the aforementioned puncture needle for minimally invasive treatment, the soft sheath is a double-lumen catheter structure, the first catheter and the second catheter are connected with the nozzles of the main pipe and the auxiliary pipe respectively, the front end of the first catheter is open and the side wall is sealed, and the outer wall of the front part of the second catheter is sealed. Multiple side perforations are distributed, and the front end is sealed near the end of the catheter.

For the aforementioned puncture needle for minimally invasive treatment, the first catheter and the second catheter are distributed around or half-enclosed, the length of the metal needle core is 150cm-200cm, and the distribution distance of the side perforations of the soft sleeve is 8cm, 6cm, 4cm or 2cm, The outer diameter of the needle tube is 20G-16G, the branch of the secondary tube is 3cm away from the tail end of the main tube, and the second catheter is sealed at a distance of 0.5-1.0cm from the tip of the first catheter.

Compared with the prior art, the present invention has at least the following obvious advantages and beneficial effects:

1. The soft cannula of the puncture needle for minimally invasive treatment of the present invention can be left in the patient's body, which is convenient for multiple injections of drugs for lesions and wounds, which not only reduces the risk of treatment, but also reduces the patient's risk of undergoing multiple punctures. Pain, save precious time for doctors' diagnosis and treatment, and also play a role in drainage of effusion or hemorrhage at the same time.

2. The multi-side perforation design of the puncture needle for minimally invasive treatment of the present invention can achieve the effect of "one-time injection, multi-point administration", so that the drug is evenly distributed and dispersed well, which is convenient for rapid and effective hemostasis, and is beneficial to the degradation and absorption of the drug. In addition, the distribution of lateral perforations of different specifications can also be designed, and individualized selection can be made for lesions of different locations, ranges and characteristics, making the treatment process more individualized.

3. The puncture needle for minimally invasive treatment of the present invention, the soft catheter with the metal needle tip does not need to use guide wires, reamers and other instruments when puncturing the skin, and is easy to operate, and at the same time facilitates imaging monitoring of the position of the hose tip in the body.

4. The puncture needle for minimally invasive treatment of the present invention can use the double-lumen catheter to inject the water-soluble hemostatic agent and the hemostatic glue separately, which significantly reduces the risk of clogging the injection needle hole; it can also add a coating on the surface of the needle body to reduce the adhesion to the tissue ;Threads can be engraved on the needle body near the needle tip to enhance the ultrasonic reflection intensity; a three-way tube can also be connected to the injection end of the single-cavity cannula to form a double injection hole puncture needle, which can be done when the needle core is not completely pulled out inject medicine.

5. The puncture needle for minimally invasive treatment of the present invention has a relatively simple structure, low manufacturing cost, and is more valuable than the product can achieve in terms of efficacy and usability, and has considerable technological progress and medical practical value .

To sum up, the puncture needle for minimally invasive treatment of the present invention is convenient for indwelling, uniform in administration, easy to operate and convenient for monitoring. The present invention has the above-mentioned many advantages and practical value, and it has great improvement in product structure and use, significant progress in technology, and has produced easy-to-use and practical effects, and is more effective than existing puncture needles. The utility model has outstanding functions and is more suitable for practical use.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic structural view of the puncture needle for minimally invasive treatment of the present invention.

Fig. 2 is a structural schematic diagram of the soft sleeve of Example 2 of the puncture needle for minimally invasive treatment of the present invention.

3a-3c are schematic diagrams of the metal needle connection structure in FIG. 2 .

Fig. 4 is a schematic structural view of Embodiment 3 of the puncture needle for minimally invasive treatment of the present invention.

5a and 5b are schematic cross-sectional views of the dual-lumen catheter of the puncture needle for minimally invasive treatment of the present invention.

Fig. 6a and Fig. 6b are schematic diagrams of the drug delivery path of the double-lumen catheter of the puncture needle for minimally invasive treatment of the present invention.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, use method, Features and their functions are described in detail below.

Embodiment one

Please refer to FIG. 1 , the puncture needle for minimally invasive treatment of the present invention is mainly composed of a metal needle core 1 and a soft sleeve 2 .

Among them, the soft sleeve 2 is made of medical, hypoallergenic, and moderately soft and hard materials, such as special molecular structure plastics (polyethylene), thermoplastic polyethylene chloroformate (TPU), etc., to reduce tissue damage , to enhance its safety and indwellability, and a coating can also be added to the outer surface of the soft sleeve 2 to reduce adhesion to tissues.

A plurality of side perforations 21 are cross-distributed at the front of the soft sleeve 2. According to the inner diameter and length of the sleeve, the side perforations 21 can be designed in different numbers, distributions and aperture specifications, and individualized selection can be made according to the location, range and characteristics of the lesion. Make the treatment process more individualized. For example: the length of the metal needle core 1 is 150cm-200cm, the distribution spacing of the side perforations 21 of the soft sleeve 2 is 8cm, 6cm, 4cm or 2cm, and the outer diameter of the needle tube is recorded as 20G-16G according to the international general standard Gauge (G).

The tail part of the soft sleeve 2 is a syringe connection part, which can be provided with a clamping device and a blocking cap. The outside of the soft casing 2 tube wall can also be marked with a scale, so as to facilitate observation and control of the injection dose.

The outer diameter of the metal needle core 1 is slightly smaller than the inner diameter of the soft sleeve 2, so that it can be inserted into the soft sleeve 2; the surface of the needle body can be marked with a scale, so as to observe the depth of the needle; the thread can also be engraved near the needle tip , to enhance the ultrasonic reflection intensity.

Preferably, the needle tip part of the metal needle core 1 protrudes from the soft sleeve 2, and the diameter of the front port of the soft sleeve 2 is slightly narrowed, the thickness is slightly thinner, and part of the needle head of the metal needle core 1 is wrapped, so as to ensure smooth puncture, and During the needle process, the soft sleeve 2 and the metal needle core 1 will not be displaced.

When in use, the metal needle core 1 is inserted into the soft sleeve 2, which not only facilitates sending the puncture needle for minimally invasive treatment of the present invention into the patient's body, but also facilitates observation and monitoring of the needle sending process. After the needle delivery operation is completed, the metal needle core 1 is pulled out, and the soft sleeve 2 is left in the patient's body, so that one puncture and repeated administration can be realized.

Embodiment two

Please refer to FIG. 2 , on the basis of the structure of the first embodiment, a metal needle tip 22 can also be fixedly connected to the front end of the soft cannula 2 to facilitate imaging monitoring and observation of the indwelling position of the soft cannula 2 . The metal needle tip 22 can be made of metal material that is rich in elasticity and not easy to break, cast into sharp and penetrating shapes such as rhombus, slope, and cone, and has multiple radiation effects under ultrasound, making the needle tip more clearly developed. The metal needle core 1 and the metal needle tip 22 of the soft sheath 2 are tightly engaged in such ways as concave and convex, oblique occlusal or plane contact, so as to facilitate puncture and insertion of the needle.

Preferably, the connection method between the metal needle point 22 and the soft sleeve 2 can be shown in Figures 3a, 3b, and 3c. The connecting end of the metal needle point 22 is designed as a double-layer structure, and a double-layer structure is provided between the double-layer structures. bump. During connection, the double-layer structure of the metal needle point 22 clamps the front end of the soft sleeve 2, and at the same time, the protrusion is embedded in the soft sleeve 2, thereby ensuring a stable connection and a smooth transition between the metal needle point 22 and the soft sleeve 2.

Embodiment three

Please refer to shown in Fig. 4, soft sleeve pipe 2 of the present invention can also be the main and secondary pipe structure of Y font, and secondary pipe branch is apart from the about 3cm of main pipe afterbody end, and the afterbody design of secondary pipe is the same as main pipe, and is connected with main pipe. The inner cavity communicates. The needle delivery method of the minimally invasive treatment puncture needle with this structure is the same as that of the first embodiment, that is, the metal needle core 1 is inserted into the main tube of the soft sleeve 2, so that the observation and monitoring can be easily realized while the metal needle core 1 is inserted. Drugs can be injected for timely treatment when it has not been completely pulled out.

Embodiment four

On the basis of Embodiment 3, the soft sheath 2 of the present invention can also be designed as a double-lumen catheter structure, and the first catheter 23 and the second catheter 24 respectively communicate with the nozzles of the main pipe and the secondary pipe, and their distribution can be as shown in the cross-sectional schematic diagram The surrounding distribution shown in Figure 5a also adopts the half-enveloping distribution shown in Figure 5b, etc. The front end of catheter one 23 is open and the side wall is sealed. The metal needle core 1 can be punctured through the lumen, and the hemostatic glue is injected through the catheter. The outer wall of the front part of the catheter two 24 is uniformly distributed with multiple side perforations, and the front end is sealed at a distance of 0.5-1.0 cm from the tip of the catheter one 23, which is convenient for injecting water-soluble hemostatic agent. The delivery route is shown in Figure 6b.

The puncture needle for minimally invasive treatment of the present invention can realize one-time puncture and multiple administrations, and is easy to monitor the needle-feeding process, which can obviously relieve the pain of patients and reduce the difficulty of treatment. Applied to the on-site rapid treatment of abdominal parenchymal organ injury, it can not only achieve the purpose of complete hemostasis, but also be used as a temporary hemostatic treatment to gain valuable time for the evacuation process. In addition, the scope of application of the present invention is not limited to the treatment of abdominal parenchymal organ injuries, but can also be applied to the treatment of various wounds and lesions suitable for puncture, which solves the problem of incomplete coverage of injection target points and unbalanced dose control in the prior art To solve the problem, achieve the purpose of facilitating puncture, effective drug injection, and convenient retention, overcome the defects of existing medical devices, and fully meet the clinical needs.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, any skilled person who is familiar with the profession can use the above disclosure Equivalent embodiments with slight changes or modifications to equivalent changes in the technical content still fall within the scope of the technical solution of the present invention.

Claims (10)

1, a kind of puncture needle for minimally invasive treatment is characterized in that comprising metal nook closing member and soft sleeve pipe, and wherein: the metal nook closing member inserts in the soft sleeve pipe; Soft sleeve pipe afterbody is the syringe connecting portion, and the front portion is provided with a plurality of side perforations.

2, puncture needle for minimally invasive treatment according to claim 1 is characterized in that the tip portion of described metal nook closing member leans out soft sleeve pipe, the slightly thin also part syringe needle of coated metal nook closing member of the little receipts of soft sleeve pipe front end bore, thickness.

3, puncture needle for minimally invasive treatment according to claim 1 is characterized in that described soft sleeve pipe front end is fixedly connected with the metal needle point.

4, puncture needle for minimally invasive treatment according to claim 3, the connection end that it is characterized in that described metal needle point is double-decker, and between double-decker, be provided with projection, and soft telescopic front end is held in the double-decker, and aforementioned projection embeds soft sleeve pipe.

5, puncture needle for minimally invasive treatment according to claim 3 is characterized in that mode that recessed convex beyond described metal nook closing member and the soft telescopic metal needle point, inclined-plane interlock or plane join is closely carved to close.

6, puncture needle for minimally invasive treatment according to claim 1 is characterized in that described soft bushing outer surface is provided with coating and indicates scale, and afterbody is provided with folder and closes device and shutoff medicated cap; The surface of metal nook closing member indicates scale, and screw thread is carved with at nearly needle point place.

7, according to the described puncture needle for minimally invasive treatment of the arbitrary claim of claim 1-6, it is characterized in that the long 150cm-200cm of described metal nook closing member, soft telescopic side perforation distribute spacing is 8cm, 6cm, 4cm or 2cm, the external diameter of needle tubing is 20G-16G.

8,, it is characterized in that described soft sleeve pipe is the major and minor tubular construction of Y font according to the described puncture needle for minimally invasive treatment of the arbitrary claim of claim 1-6.

9, puncture needle for minimally invasive treatment according to claim 8, it is characterized in that described soft sleeve pipe is the double channel catheter structure, conduit one, conduit two connect with the mouth of pipe of the person in charge, looped pipeline respectively, the open sidewall sealing of conduit one front end, conduit two anterior outer walls a plurality of side perforations that distribute, the sealing of the nearly conduit of front end one end place.

10, puncture needle for minimally invasive treatment according to claim 9, it is characterized in that described conduit one and conduit two distribute for wrapping around distribution or half, the long 150cm-200cm of metal nook closing member, soft telescopic side perforation distribute spacing is 8cm, 6cm, 4cm or 2cm, the external diameter of needle tubing is 20G-16G, the looped pipeline bifurcation is apart from being responsible for tail end 3cm, and conduit two seals in distance conduit one most advanced and sophisticated 0.5-1.0cm place.

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