A detection device for electromagnetic navigation system

Abstract

The utility model relates to a detection device for an electromagnetic navigation system, the detection device comprising: a probe, the probe comprising a probe body and at least one wire, the end of the at least one wire does not exceed the end of the probe body, and an electromagnetic coil is arranged at the end of the at least one wire; an interface device, the interface device is used to connect to an external power supply device, the at least one wire can be electrically connected to the interface device, thereby supplying power to the electromagnetic coil; at least one accommodating portion is arranged on the probe body, for accommodating the electromagnetic coil, so that the electromagnetic coil does not exceed the outer contour of the probe body. The utility model reduces the diameter of the detection end as a whole by rationally arranging the electromagnetic coils, so that the required operation can be completed with a smaller channel. In addition, by rationally arranging the two electromagnetic coils, the positioning accuracy can be improved, effectively providing assistance for surgical operations and exploration.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a detection device used in an electromagnetic navigation system. Background Art

[0002] During surgery or diagnosis, a probe is needed to explore the patient's body. An electromagnetic navigation system is provided to know the specific location of the probe after it enters the patient's body. However, existing probes have the problem of large overall size and low positioning accuracy, which requires a larger channel for the probe to pass through, which affects the smooth progress of the surgery and has a negative impact on the patient's body. Utility Model Content

[0003] In order to solve the above technical problems at least to a certain extent, the present utility model proposes the following solutions.

[0004] A detection device for an electromagnetic navigation system, the detection device comprising:

[0005] A probe, the probe comprising a probe body and at least one wire, the end of the at least one wire does not exceed the end of the probe body, and an electromagnetic coil is arranged at the end of the at least one wire;

[0006] an interface device, the interface device being used to connect to an external power supply device, the at least one wire being electrically connectable to the interface device, thereby supplying power to the electromagnetic coil;

[0007] At least one accommodating portion is provided on the probe body for accommodating the electromagnetic coil so that the electromagnetic coil does not exceed the outer contour of the probe body.

[0008] According to an example of the present invention, a control device is further included, and the control device can cut off or connect the electrical connection between the at least one wire and the interface device.

[0009] According to an example of the present utility model, the control device and the interface device are electrically connected via a connecting line.

[0010] According to an example of the utility model, the probe body is provided with a groove extending along the extension direction of the probe body, the groove is connected to the accommodating portion and communicates with each other, and the portion of the at least one wire connected to the electromagnetic coil is at least partially located in the groove.

[0011] According to an example of the present invention, the at least one conducting wire includes a first conducting wire and a second conducting wire, the first conducting wire has a first electromagnetic coil at an end thereof, and the second conducting wire has a second electromagnetic coil at an end thereof.

[0012] According to an example of the present invention, the probe body has a first accommodating portion for accommodating the first electromagnetic coil and a second accommodating portion for accommodating the second electromagnetic coil.

[0013] According to an example of the present invention, the first electromagnetic coil and the second electromagnetic coil are arranged to be spaced apart by a distance L in the extension direction of the probe body.

[0014] According to an example of the present invention, the first electromagnetic coil and the second electromagnetic coil have the same length a, and the distance L is greater than the length a and less than 5 times of the length a.

[0015] According to an example of the present invention, the axis defined by the first electromagnetic coil and the axis defined by the second electromagnetic coil are arranged at an angle.

[0016] According to an example of the present invention, the axis defined by the first electromagnetic coil and the axis defined by the second electromagnetic coil are in the same plane.

[0017] As can be seen from the above, the utility model reduces the diameter of the detection end as a whole by rationally arranging the electromagnetic coils, so that the required operation can be completed with a smaller channel. In addition, the rational arrangement of the two electromagnetic coils can improve the positioning accuracy and effectively provide assistance for surgical operations and exploration.

[0018] Other features and advantages of the present invention will be shown in the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features and advantages of the present invention will be clearly understood through the detailed description provided below with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus cannot be regarded as limiting the present invention, wherein:

[0020] Figure 1 The figure shows an overall schematic diagram of a detection device for an electromagnetic navigation system according to the utility model.

[0021] Figure 2 A schematic diagram of a head of a probe of a detection device for an electromagnetic navigation system according to the utility model is shown in a first viewing angle.

[0022] Figure 3 A schematic diagram of the head of the probe of the detection device for the electromagnetic navigation system according to the present invention is shown at a second viewing angle.

[0023] Figure 4 A schematic diagram of the head of the probe of the detection device for the electromagnetic navigation system according to the present utility model is shown in the third viewing angle.

[0024] Figure 5 A schematic diagram of the head of the probe of the detection device for the electromagnetic navigation system according to the utility model is shown at a fourth viewing angle. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, many specific details are set forth so that those skilled in the art can more fully understand and implement the present invention. However, it is obvious to those skilled in the art that the implementation of the present invention may not have some of these specific details. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below may be considered to implement the present invention, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments and advantages are for illustrative purposes only and should not be regarded as features or limitations of the claims unless clearly stated in the claims.

[0026] In the following description, the descriptions about directions, such as "upper", "lower", "inner", "outer", "radial", "axial", etc., which may be used, are only for the convenience of description, unless otherwise specified, and are not intended to form any limitation on the technical solution of the utility model. In addition, in the following description, terms such as "first", "second", etc. are used to describe the elements of the present application, and these terms are only used to distinguish the elements, and are not intended to limit the nature, sequence, order or number of these elements.

[0027] Figure 1 FIG. 1 shows an overall schematic diagram of a detection device for an electromagnetic navigation system according to the utility model. Figure 1 As shown, the detection device includes a probe 10, a control device 20, a connecting line 30 and an interface device 40. Specifically, the interface device 40 can be in the form of a plug, etc., so as to be connected to an external power supply to provide power for the entire detection device. The interface device 40 is connected to the control device 20 via the connecting line 30. For this purpose, the connecting line 30 is a wire to transmit power to the control device 20. The control device 20 has a switch, thereby controlling whether the power transmitted from the connecting line 30 can be transmitted to the probe 10. As an exemplary application, Figure 1 The detection device shown can be used for cranial and brain detection.

[0028] Combine the following Figure 2-5 The specific structure of the probe 10 is described, wherein Figure 2-5The head of the probe is shown from different perspectives so as to clearly show the structure of the probe. In this article, the "head of the probe" is intended to mean the portion of the end of the probe 10 away from the control device 20. In terms of length, the length of the head does not exceed 30% of the total length of the probe 10, more preferably may not exceed 20% of the total length of the probe 10, and more preferably may not exceed 10% of the total length of the probe 10.

[0029] Specifically, the probe 10 includes a probe body 11. The probe body 11 can be made of materials such as stainless steel and has a certain length. Preferably, the probe body 11 has a substantially cylindrical outer surface.

[0030] As an exemplary embodiment, the probe 10 further includes two wires, referred to herein as a first wire 12 and a second wire 13. As a specific example, at the end connected to the control device 20, the probe body 11, the first wire 12 and the second wire 13 extend parallel to each other. As an optional manner, the first wire 12 and the second wire 13 can be located on both sides of the probe body 11, for example, the first wire 12 and the second wire 13 are symmetrically arranged relative to the probe body 11. The first wire 12 and the second wire 13 extend along the probe body 11, but as shown in FIG. Figure 2 As shown, the end of each wire does not exceed the end of the probe body 11. In this document, "end" is intended to refer to the end of the probe body 11 or the two wires that is far away from the control device 20.

[0031] An electromagnetic coil is provided at the end of each wire, so that when current is passed through the electromagnetic coil, a magnetic field can be generated. When used in conjunction with an electromagnetic navigation system, the position of the head of the probe 10 can be determined by the electromagnetic navigation system via the magnetic field, and the position can be displayed on a display device, for example, to help the user conveniently and accurately determine the position of the probe body 11.

[0032] In order to determine the position of the probe body 11 by the position of the electromagnetic coil, on the one hand, the end of each wire does not exceed the end of the probe body 11, and on the other hand, the electromagnetic coil located at the end of the wire or serving as the end of the wire cannot be too far away from the end of the probe 11. As a preferred embodiment, the electromagnetic coil closest to the end of the probe body 11 among the first wire 12 and the second wire 13 is located at Figures 2 to 5 In the example, the electromagnetic coil attached to the first wire 12 is no more than 20 mm, preferably no more than 10 mm, and more preferably no more than 5 mm from the end of the probe body 11. Thus, the position of the electromagnetic coil displayed in the electromagnetic navigation system can be used as the position of the head of the probe body 11.

[0033] As an improvement of the utility model, Figure 3As shown, at the end of the probe body 11, a first receiving portion 11a for receiving the electromagnetic coil of the first wire 12 is provided. The first receiving portion 11a is recessed inward from the surface of the probe body 11. Figure 3 The first accommodating portion 11a shown has four faces, namely, the first face, the second face, the third face and the fourth face, wherein the first face and the second face are parallel to each other and perpendicular to the extension direction of the probe body 11 to define the length of the first accommodating portion 11a, and the third face and the fourth face are perpendicular to each other and both are perpendicular to the first face and the second face at the same time. However, those skilled in the art know that the profile of the first accommodating portion can have other forms, as long as the electromagnetic coil of the first wire 12 can not exceed the cylindrical profile of the probe body 11 when it is placed in the first accommodating portion 11a. For example, the first accommodating portion can have a curved surface that is recessed inward from the profile of the probe body 11, such as a cylindrical surface. Thus, the overall diameter of the electromagnetic coil of the probe body 11 and the first wire 12 can be reduced. In this way, when in use, the channel area required for the electromagnetic coil of the probe body 11 and the first wire 12 is smaller, thereby reducing the operational risk and damage to the patient.

[0034] Furthermore, if Figure 2 and Figure 4 As shown, in the length direction of the probe body 11, a second accommodating portion 11b is also provided to accommodate the electromagnetic coil of the second wire 13. As a specific example, the second accommodating portion 11b has four faces, namely the first face, the second face, the third face and the fourth face, wherein the first face and the second face are parallel to each other and perpendicular to the extension direction of the probe body 11 to define the length of the second accommodating portion 11b, and the third face and the fourth face are perpendicular to each other and both are perpendicular to the first face and the second face at the same time. Similarly, the contour of the second accommodating portion 11b is designed in any feasible form, as long as the electromagnetic coil of the second wire 13 can not exceed the cylindrical contour of the probe body 11 when placed in the second accommodating portion 11b. Therefore, in actual use, since the probe body 11 may need to enter the patient's body for a longer length, in the face of this situation, the channel area required by the electromagnetic coil of the probe body 11 and the second wire 13 according to the utility model is also smaller, which can reduce the operation risk and the damage to the patient.

[0035] As a further improvement of the present invention, see Figures 2 to 5, since the two wires extend roughly parallel to the probe body 11 at the beginning when extending from the control device 20 to the end, and then the electromagnetic coil at the end thereof needs to enter the corresponding receiving part, in order to make the transition smoother and fix the electromagnetic coil relative to the probe body 11, the probe body 11 is provided with grooves in its own part connected to each receiving part, and the corresponding wire will first enter the corresponding groove when entering the corresponding receiving part. The grooves prevent the wires from being bent too much when entering the receiving part, and can also fix the wires in a shape-fitting manner.

[0036] When the electromagnetic navigation system is used to locate the probe of the utility model, if only one electromagnetic coil is used for positioning, it can achieve low-precision positioning of 5 degrees of freedom. For this reason, the utility model is provided with two electromagnetic coils so as to achieve high-precision positioning with more degrees of freedom, such as 6 degrees of freedom. In actual use, an electromagnetic coil closer to the end of the probe body 11 is used as the main positioning coil, and the other electromagnetic coil is used as an auxiliary positioning coil.

[0037] In order to further improve the positioning accuracy, the utility model also proposes the following improvement: the axes defined by the two electromagnetic coils are set to form a non-zero angle with each other. In other words, the extension directions of the axes defined by the two electromagnetic coils are not parallel to each other. For example, the extension directions of the axes defined by the two electromagnetic coils are not all parallel to the direction of the axis of the probe body 11.

[0038] Depending on the specific shapes of the first accommodating portion and the second accommodating portion and the specific positions of the two electromagnetic coils in their respective accommodating portions, the axes defined by the two electromagnetic coils may be in the same plane or in two different planes.

[0039] As a preferred embodiment, regardless of whether the axes defined by the two electromagnetic coils are in the same plane or different planes, the angle formed by the axis of each electromagnetic coil and the axis of the probe body 11 is smaller than a preset angle. For example, depending on the diameter of the probe body 11 and the size of the electromagnetic coil, the preset angle may be less than 30°, preferably less than 15°, more preferably less than 10°, and more preferably less than 5°.

[0040] As a specific example, the following describes the situation where the axes defined by the two electromagnetic coils are in the same plane. For the sake of clarity, it is stipulated that the axis direction defined by the electromagnetic coil of the first wire 12 forms a first angle α with the axis direction of the probe body 11, and the axis direction defined by the electromagnetic coil of the second wire 13 forms a second angle β with the axis direction of the probe body 11, wherein the first angle α and the second angle β are both acute angles. In this case, the angle between the axis direction defined by the electromagnetic coil of the first wire 12 and the axis direction defined by the electromagnetic coil of the second wire 13 is the sum of the first angle α and the second angle β.

[0041] As a preferred example, the utility model also stipulates that the electromagnetic coils of the first coil 12 and the second coil 13 have the same size. Further, the distance between the two electromagnetic coils should not be less than the length of each electromagnetic coil. That is, the distance L between the two electromagnetic coils should be greater than the length a of each electromagnetic coil. As a preferred example on the other hand, the distance between the two coils should not be too far. To this end, the utility model stipulates that the distance L between the two electromagnetic coils should be less than 5 times the length a of each electromagnetic coil, that is, L should be less than 5a. Preferably, L can be equal to 3a. Through the above arrangement, the positioning accuracy obtained by using two electromagnetic coils can be further improved. In the utility model, "the distance between the two electromagnetic coils" refers to the length of the projection of the line between the two closest points between the two electromagnetic coils in the extension direction of the probe body. Specifically, the electromagnetic coil of the first wire 12 has a first end and a second end, and the electromagnetic coil of the second wire 13 has a first end and a second end. The first end of each coil is the end of the wire where it is located, and the other end is the second end. Then the distance between the two electromagnetic coils is the length of the projection of the line between the second end of the electromagnetic coil of the first coil and the first end of the second coil in the extension direction of the probe body 11.

[0042] The above is a detailed description of the specific structure of the utility model. As can be seen from the above, the utility model proposes a detection device, which reduces the diameter of the detection end as a whole through the reasonable arrangement of the electromagnetic coils, so that the required operation can be completed with a smaller channel. In addition, through the reasonable arrangement of the two electromagnetic coils, the positioning accuracy can also be improved, which can effectively provide assistance for surgical operations.

[0043] For those skilled in the art, various modifications and variations may be made to the embodiments disclosed above without departing from the scope or spirit of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from the practice of the utility model disclosed in this specification. This specification and the examples disclosed therein should be considered to be illustrative only, and the true scope of the utility model is specified by the appended claims and their equivalents.

Claims

1. A detection device for an electromagnetic navigation system, the detection device comprising: A probe (10), the probe (10) comprising a probe body (11) and at least one wire, the end of the at least one wire does not extend beyond the end of the probe body (11), and an electromagnetic coil is arranged at the end of the at least one wire; An interface device (40), the interface device (40) being used to connect to an external power supply device, the at least one wire being electrically connectable to the interface device (40), thereby supplying power to the electromagnetic coil; It is characterized in that At least one accommodating portion is provided on the probe body (11) for accommodating the electromagnetic coil, so that the electromagnetic coil does not exceed the outer contour of the probe body (11).

2. The detection device for an electromagnetic navigation system according to claim 1, characterized in that: It also comprises a control device (20), which can cut off or connect the electrical connection between the at least one wire and the interface device (40).

3. The detection device for an electromagnetic navigation system according to claim 2, characterized in that: The control device (20) and the interface device (40) are electrically connected via a connecting line (30).

4. The detection device for an electromagnetic navigation system according to any one of claims 1 to 3, characterized in that: The probe body (11) is provided with a groove extending along the extension direction of the probe body (11), the groove is connected to the accommodating portion and communicates with each other, and the portion of the at least one wire connected to the electromagnetic coil is at least partially located in the groove.

5. The detection device for an electromagnetic navigation system according to any one of claims 1 to 3, characterized in that: The at least one conductive wire comprises a first conductive wire (12) and a second conductive wire (13), wherein the first conductive wire (12) has a first electromagnetic coil at its end, and the second conductive wire (13) has a second electromagnetic coil at its end.

6. The detection device for an electromagnetic navigation system according to claim 5, characterized in that: The probe body (11) has a first accommodating portion (11a) for accommodating a first electromagnetic coil and a second accommodating portion (11b) for accommodating a second electromagnetic coil.

7. The detection device for an electromagnetic navigation system according to claim 6, characterized in that: The first electromagnetic coil and the second electromagnetic coil are arranged at a distance L apart from each other in the extending direction of the probe body (11).

8. The detection device for an electromagnetic navigation system according to claim 7, characterized in that: The first electromagnetic coil and the second electromagnetic coil have the same length a, and the distance L is greater than the length a and less than 5 times of the length a.

9. The detection device for an electromagnetic navigation system according to claim 5, characterized in that: The axis defined by the first electromagnetic coil and the axis defined by the second electromagnetic coil are disposed at an angle.

10. The detection device for an electromagnetic navigation system according to claim 9, characterized in that: The axis defined by the first electromagnetic coil and the axis defined by the second electromagnetic coil are in the same plane.

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