CN210330725U - Ablation needle with positioning sensor mounted at needle head part - Google Patents

Abstract

The utility model relates to the technology of medical equipment, and aims to provide an ablation needle with a positioning sensor arranged at the needle head. Comprises a positioning sensor, a needle body and a handle; the positioning sensor is arranged at the front end of the inner cavity of the needle body, and a lead connected with the positioning sensor is led out from the tail end of the inner cavity of the needle body. The ablation needle of the utility model can acquire real-time needle head three-dimensional coordinate information and posture information in the puncture process, and is not influenced by the bending of the needle body; the ablation needle insertion route and the position can be dynamically displayed in real time by matching with three-dimensional image processing software and hardware, and accurate positioning information is provided for puncture of a clinical ablation operation. The defects that the development of the ablation needle in part of tissues is not clear and the accurate position of the current ablation needle cannot be accurately known in clinic can be avoided; the simplicity of the operation is improved, the clinical risk is reduced, and the operation wound is reduced.

Description

Ablation needle with positioning sensor mounted at needle head part

Technical Field

The utility model belongs to the technology of medical equipment, concretely relates to ablation needle of installing positioning sensor at syringe needle position.

Background

Currently, there are two ways of treating tumors by ablation, microwave ablation and radiofrequency ablation. The key step of the ablation operation is to safely and accurately puncture the needle head of the ablation needle to the tumor treatment part, and blood vessels, ribs, important organs and the like need to be avoided in the puncture process. The existing ablation treatment equipment has the following defects:

(1) ablation needle puncture needs a professional doctor with rich clinical experience to complete. During the puncture process, three-dimensional space imagination is required according to image information such as ultrasound, CT and MRI, so as to determine the current specific position of the ablation needle, and meanwhile, blood vessels, ribs and visceral organs are required to be avoided. These requirements are very difficult for a physician who has just performed an ablation procedure.

(2) In the actual clinical treatment, because the tumor tissue structure is relatively complex, the development of the ablation needle head in certain tissues is not clear during image-guided puncture, and a doctor cannot easily judge the current position of the ablation needle.

(3) Chinese utility model patent CN 204708979U discloses an ablation needle with a positioning device. The ablation needle realizes positioning in an electromagnetic tracking and positioning system by utilizing a magnetic positioning sensor arranged at the tail part of the needle, and carries out parameter correction on the positioning in order to obtain the three-dimensional coordinate position of the needle head. However, the magnetic positioning sensor of the ablation needle in the technical scheme is arranged at the tail part of the ablation needle, and the ablation needle can deform due to stress when entering human tissues, and the deformation is different for different patients, different operation positions or different operation methods of doctors. Therefore, the magnetic positioning sensor mounted on the tail part cannot accurately measure the spatial position information of the needle point.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough among the prior art, provide a needle that melts of installation position sensor in syringe needle portion.

For solving the technical problem, the utility model discloses a solution is:

the ablation needle provided with the positioning sensor at the needle head part comprises the positioning sensor, a needle body and a handle; the positioning sensor is arranged at the front end of the inner cavity of the needle body, and a lead connected with the positioning sensor is led out from the tail end of the inner cavity of the needle body.

As an improvement, the positioning sensor is fixed at the front end of the inner cavity of the needle body by (high temperature resistant) UV glue.

As a modification, the positioning sensor is a magnetic positioning sensor, and the maximum diameter of the positioning sensor is 0.55mm, and the maximum length of the positioning sensor is 8 mm.

As a modification, the number of the conducting wires is two, and the surfaces of the conducting wires are coated with (high-temperature resistant) insulating coatings; the tail or the side face of the handle is provided with a hole for leading out a lead, the hole is filled with UV glue to realize fixation, and the lead positioned outside is wrapped by flexible insulating rubber.

As a refinement, the maximum diameter of the wire is 0.3 mm.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the ablation needle of the utility model can acquire real-time needle head three-dimensional coordinate information and posture information in the puncture process, and can not be influenced by the bending of the needle body; the ablation needle insertion route and the position can be dynamically displayed in real time by matching with three-dimensional image processing software and hardware, and accurate positioning information is provided for puncture of a clinical ablation operation.

(2) The utility model can avoid the defects that the development of the ablation needle in part of tissues in clinic is not clear and the accurate position of the current ablation needle can not be accurately known; the simplicity of the operation is improved, the clinical risk is reduced, and the operation wound is reduced.

Drawings

Fig. 1 is a schematic structural view of the ablation needle of the present invention.

FIG. 2 is a schematic block diagram of a positioning device.

Fig. 3 is an implementation schematic diagram of electromagnetic tracking positioning.

In fig. 1, the sensor is positioned; 2, a needle body; and 3, a handle.

Detailed Description

As shown in figure 1, the ablation needle of the utility model, which is provided with a positioning sensor at the needle head part, comprises a positioning sensor 1, aneedle body 2 and ahandle 3; the positioning sensor 1 is arranged at the front end of the inner cavity of theneedle body 2 and can be fixed by high-temperature resistant UV glue. The lead connected with the needle body is led out from the tail end of the inner cavity of theneedle body 2. Because the end of theneedle body 2 is installed on thehandle 3, a hole can be formed in the tail or the side face of thehandle 3 for leading out a lead, the hole is filled with high-temperature-resistant UV glue to realize fixation, and the lead positioned outside is wrapped by flexible insulating rubber. The number of the leads is two, the surfaces of the leads are coated with high-temperature-resistant insulating coatings, and the maximum diameter of the leads is 0.3 mm.

The commonly used microwave ablation needle usually selects a titaniumalloy needle tube 2 with an outer diameter of 1.6mm and an inner diameter of 1.2mm, wherein the diameter of the microwave coaxial cable is 0.5 mm. The positioning sensor 1 can be a magnetic positioning sensor, the maximum diameter of the magnetic positioning sensor is 0.55mm, and the maximum length of the magnetic positioning sensor is 8 mm; the maximum diameter of the used lead is 0.3mm, and the surface of the lead is provided with a high-temperature resistant insulating coating which keeps insulation with the microwave coaxial cable originally positioned in the inner cavity of theneedle body 2; the two connecting wires penetrate out of the opening at the side of the handle along the inner wall and are fixed with the handle by UV glue; therefore, the utility model provides a positioning sensor 1 can surely install in the conventional needle that melts, and can not lead to the change of the original structural feature ofneedle body 2, therefore can not produce negative effects to the performance ofneedle body 2.

The content of the prior art (for example, chinese utility model patent CN 204708979U) can be referred to for the positioning device and the implementation solution thereof cooperating with the positioning sensor 1.

The specific use of the present invention is described below:

refer to fig. 2, 3; a magnetic positioning device, such as an NDI Aurora electromagnetic tracking positioning system, comprises a positioning sensing device 1-1, a control unit 1-2 and a positioning signal generator 1-3. The control unit 1-2 controls the positioning signal generator 1-3 to generate a positioning signal required by positioning, and the positioning information of the positioning sensing equipment 1-1 is received, analyzed and processed by the control unit 1-2 to obtain the space coordinate information of the positioning sensing equipment 1-1. The positioning sensing device 1-1 is composed of a magnetic positioning sensor 1-4, a memory 1-5 and a connector 1-6, the control unit 1-2 is composed of an interface unit 1-7 and a magnetic control unit 1-9, and the positioning signal generator 1-3 is a magnetic field generator 1-8. The magnetic control unit 1-9 controls the magnetic field generation 1-8 to generate the magnetic field required for positioning, and the positioning information of the magnetic positioning sensor 1-4 is amplified and digitized by the interface unit 1-7 through the connector 1-6. The magnetic control unit 1-9 receives and analyzes the information of the processing interface unit 1-7, and then the coordinate information of the magnetic positioning sensor 1-4 can be obtained. The magnetic positioning sensor 1-4 can be a five-degree-of-freedom sensor or a six-degree-of-freedom sensor, and the magnetic positioning sensor 1-4 is directly arranged at the needle head end in the inner cavity of the ablation needle body 2 (as shown in figure 1). And the position of the needle head in the human tissue can be known in real time in the ablation puncture process by combining the early CT scanning image.

In the ablation operation, the magnetic positioning sensor 1-4 transmits the positioning information of the needle head of the ablation needle to the connected equipment, and the relative three-dimensional coordinate system of the image and the ablation needle can be formed by combining the image scanned in the early stage, so that the real-time three-dimensional coordinate position information and the real-time three-dimensional coordinate posture information of the ablation needle can be obtained in the puncture process.

Claims (5)

1. An ablation needle with a positioning sensor arranged at a needle head part comprises the positioning sensor, a needle body and a handle; the positioning sensor is a magnetic positioning sensor, is arranged at the front end of the inner cavity of the needle body, and leads connected with the positioning sensor are led out from the tail end of the inner cavity of the needle body.

2. The ablation needle of claim 1, wherein the positioning sensor is fixed to the front end of the needle body lumen with UV glue.

3. The ablation needle of claim 1, wherein the positioning sensor has a maximum diameter of 0.55mm and a maximum length of 8 mm.

4. The ablation needle of claim 1, wherein there are two of the wires, the surfaces of which are coated with an insulating coating; the tail or the side face of the handle is provided with a hole for leading out a lead, the hole is filled with UV glue to realize fixation, and the lead positioned outside is wrapped by flexible insulating rubber.

5. The ablation needle of claim 1, wherein the maximum diameter of the wire is 0.3 mm.

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