Temperature sensor array optical fiber and interventional operation instrument

Abstract

The utility model provides a temperature sensor array optical fiber and interventional operation instrument, including optical fiber portion and encapsulation portion, optical fiber portion and interventional needle are fixed through encapsulation portion, and the optical fiber is very thin, so in the minimally invasive interventional operation, along with the interventional needle, can enter the human body and reach the surgical area or its vicinity, thereby performing temperature monitoring. And the optical fiber has good toughness, can be bent or twisted along with the interventional needle, and is suitable for operation requirements. Furthermore, the core part of the optical fiber body is provided with a plurality of temperature sensing points (optical fiber bragg grating), so that the temperatures of a plurality of point positions in an operation area can be monitored at the same time, and the optical fiber bragg grating has high sensitivity and high resolution, can accurately measure tiny temperature change, and provides a reliable data source for temperature field reconstruction. Besides, different protective layers are respectively arranged in the sensing area and the non-sensing area of the optical fiber, so that the optical fiber does not fall off or displace in the process of moving along with the interventional needle, and meanwhile, the sensing of the optical fiber to the temperature is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sensor technical field, concretely relates to a temperature sensor array optical fiber and interventional operation appliance. BACKGROUND

[0002] In some minimally invasive interventional operations, it is necessary to monitor the temperature field of the operation area in the human body, for example, in the minimally invasive interventional operation of heat ablation of tumor tissue, an ultrasonic transducer is used to heat the tumor lesion so that it is in a high temperature state and the target cells are irreversibly necrotic, thereby achieving the purpose of treatment, in the operation, in order to enable the ultrasound to be accurately focused on the lesion and to avoid or reduce the damage to the normal tissue around the lesion caused by excessive heating, it is necessary to monitor the temperature field around the ablation site.

[0003] However, at present, the indirect monitoring method is mainly used in actual application, the ablation site is imaged through nuclear magnetic resonance imaging, ultrasonic imaging, B-ultrasound and the like, and the temperature field around the ablation site is reconstructed in combination with an algorithm. The temperature field precision obtained by the indirect monitoring method is affected by the imaging quality, and more importantly, the real-time performance is poor, and the doctor cannot be provided with high real-time temperature field distribution information in the operation process.

[0004] If the temperature can be monitored near the operation area in the operation process, and the real-time temperature field reconstruction is carried out based on the temperature monitoring result, higher real-time temperature field information can be provided for the doctor, and direct temperature measurement can also avoid the influence caused by the imaging quality. However, there is still a lack of such measuring instrument. Some existing temperature detection instruments cannot enter the operation area through the minimally invasive incision due to the large size, and some cannot reach the operation area due to the inability to bend, and the corrosion of body fluid and the like on the detection instrument and the damage of the detection instrument to the human tissue need to be considered when the temperature is detected in the operation area, which increases the design difficulty. UTILITY MODEL CONTENT

[0005] The utility model is carried out in order to solve the above-mentioned problems, and the purpose is to provide a temperature sensor array optical fiber which can be used for accurate temperature sensing of the operation area in the human body in the minimally invasive interventional operation and an interventional operation appliance adopting the optical fiber, and the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of temperature sensor array optical fiber, for sensing the temperature of operation area in the intervention operation of using intervention needle, which has such technical features, it includes: optical fiber part, including optical fiber body and multiple temperature sensing points formed at the inner core of the optical fiber body, the temperature sensing point is fiber Bragg grating;And packaging part, for the packaging of the optical fiber part, wherein the optical fiber part includes sensing area and non-sensing area, the temperature sensing point is distributed in the sensing area, the packaging part includes: end protective layer, including on the non-sensing area;Optical fiber protective layer, at least cladding on the sensing area;Bonding portion, for fixing the end protective layer with the intervention needle;And multiple fixed parts, respectively for fixing the optical fiber protective layer at each temperature sensor with the intervention needle.

[0007] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: it further includes: an interface part for connecting with a fiber grating demodulator, wherein both ends of the optical fiber part are the non-sensing areas, the end protective layer is cladded on one of the non-sensing areas connected with the interface part; the optical fiber protective layer is cladded on the sensing area and the other non-sensing area, the bonding portion is arranged between the end protective layer and the intervention needle, and the multiple fixed parts are cladded on the optical fiber protective layer at each temperature sensor and the intervention needle.

[0008] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the end protective layer is a glass fiber layer, the optical fiber protective layer is a polyimide layer, and the bonding portion is multiple and sequentially arranged at intervals.

[0009] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the fixed part is a metal sheet in the shape of a cylinder, the axial length of the metal sheet is greater than the grating length of the temperature sensing point, the corresponding temperature sensing point is located in the axial middle part of the fixed part, and the metal sheet is a copper sheet or a copper alloy sheet.

[0010] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the packaging part further includes: multiple temperature isolation portions, which are adhesive portions composed of non-heat-conducting glue, are arranged between the optical fiber protective layer at each temperature sensing point and the intervention needle, and are used for heat insulation.

[0011] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the packaging part further includes: multiple sensing point protective portions, which are cladded on the optical fiber part at each temperature sensing point or the optical fiber protective layer, and are polyimide coating layers.

[0012] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the grating length of each temperature sensing point is 1mm-3.5mm, the number of temperature sensing points is 25-35, and the plurality of temperature sensing points are arranged at equal intervals.

[0013] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the grating length of each temperature sensing point is 1mm-3.5mm, the number of temperature sensing points is 25-35, and the plurality of temperature sensing points are arranged at equal intervals.

[0014] The temperature sensor array optical fiber provided by the utility model can also have the following technical features: the grating length of each temperature sensing point is 1mm-3.5mm, the number of temperature sensing points is 25-35, and the plurality of temperature sensing points are arranged at equal intervals.

[0015] The utility model provides an interventional surgical instrument, this interventional surgical instrument has the following technical features: an interventional needle and the temperature sensor array optical fiber described above are fixed with the interventional needle, are used in minimally invasive interventional surgery with the interventional needle enter the operation area and carry out temperature perception.

[0016] The utility model has the effects of

[0017] The temperature sensor array fiber optic and interventional surgical instrument provided by this utility model include an optical fiber section and an encapsulation section. The optical fiber section is fixed to the interventional needle via the encapsulation section. The optical fiber is very thin, allowing it to enter the body with the interventional needle during minimally invasive surgery to reach the surgical area or its vicinity for temperature monitoring. Furthermore, the optical fiber has good flexibility, allowing it to bend or twist with the interventional needle to adapt to surgical needs. Further, the core of the optical fiber body has multiple fiber Bragg gratings (FBGs), forming multiple temperature sensing points. Therefore, multiple temperature sensing points in a row can simultaneously monitor the temperature of the surgical area and / or multiple points in its vicinity. The fiber Bragg gratings have high sensitivity and high resolution, enabling accurate measurement of minute temperature changes and providing a reliable data source for three-dimensional temperature field reconstruction. In addition, based on the characteristics of the optical fiber section, different protective layers are provided in its sensing and non-sensing areas. The protective layer in the non-sensing area is bonded to the interventional needle, while the protective layer in the sensing area is fixed to the interventional needle via multiple fixing parts, ensuring the fixation strength between the two. This prevents the optical fiber from falling off or shifting during movement with the interventional needle, while maintaining the optical fiber's temperature sensing capability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the interventional surgical instrument in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the temperature sensor array optical fiber in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the packaging part in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram showing the location distribution of temperature sensing points in the optical fiber of the temperature sensor array in this embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram showing the usage state of the interventional surgical instruments in the embodiments of this utility model.

[0023] Figure label:

[0024] Interventional surgical instrument 100; temperature sensor array fiber optic cable 10; fiber optic section 11; non-sensing area 11A; sensing area 11B; fiber optic body 111; temperature sensing point 112; interface section 12; encapsulation section 13; end protection layer 131; fiber optic protective layer 132; sensing point protection section 133; first fixing section 134; second fixing section 135; temperature isolation section 136; interventional needle 30; fiber optic grating demodulator 20; temperature field reconstruction device 40. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following describes in detail the temperature sensor array fiber and interventional surgical instrument of this utility model with reference to the embodiments and accompanying drawings.

[0026] <Example>

[0027] This embodiment provides an interventional surgical instrument for use in minimally invasive interventional procedures, and for sensing the temperature of the surgical area during the procedure. This embodiment uses a minimally invasive interventional procedure for thermal ablation of tumors as an example for illustration.

[0028] Figure 1 This is a schematic diagram of the interventional surgical instrument in this embodiment.

[0029] like Figure 1 As shown, the interventional surgical instrument 100 includes a temperature sensor array fiber optic 10 and an interventional needle 30. The interventional needle 30 is a medical interventional needle in the prior art. A portion of the temperature sensor array fiber optic 10 is fixed to the interventional needle 30. In minimally invasive interventional surgery, the temperature sensor array fiber optic 10 enters the body along with the interventional needle 30 and performs temperature detection in or near the surgical area.

[0030] Figure 2 This is a schematic diagram of the optical fiber structure of the temperature sensor array in this embodiment. Some packaging structures are not shown in the diagram. Figure 3 This is a schematic diagram of the packaging section in this embodiment.

[0031] like Figures 1 to 3 As shown, the temperature sensor array fiber optic 10 includes a fiber optic section 11, an interface section 12, and a packaging section 13.

[0032] The optical fiber section 11 includes an optical fiber body 111 and multiple independent temperature sensing points 112 disposed within the optical fiber body 111, enabling simultaneous measurement of temperature at multiple points. Each temperature sensing point 112 is a fiber Bragg grating (FBG) directly etched into the core of the optical fiber body 111 using a writing technique. In this embodiment, the grating length of each temperature sensing point 112 is 1mm to 3.5mm, preferably 1mm, and the multiple temperature sensing points 112 are evenly spaced. The fiber Bragg grating has high sensitivity and high resolution, enabling accurate measurement of minute temperature changes and providing a reliable data source for three-dimensional temperature field inversion calculations. When the temperature changes, the Bragg wavelength of the fiber Bragg grating changes accordingly; therefore, the corresponding temperature change can be demodulated based on the wavelength changes of each temperature sensing point 112.

[0033] One end of the interface section 12 is connected to one end of the optical fiber section 11, and the other end of the interface section 12 is used to connect to the fiber grating demodulator (FBG fiber demodulator).

[0034] The packaging part 13 comprises an end protection layer 131, an optical fiber protection layer 132, a plurality of sensing point protection parts 133, a first fixing part 134, a second fixing part 135, and a temperature isolation part 136.

[0035] The two ends of the optical fiber part 11 are not formed with temperature sensing points, and are non-sensing regions 11A. The middle section of the optical fiber part 11 is distributed with a plurality of temperature sensing points, and is a sensing region 11B. The end protection layer 131 is coated on the outer surface of one non-sensing region 11A of the optical fiber part 11 connecting interface part 12. In this embodiment, the end protection layer 131 is a glass fiber layer, which can withstand a high temperature of 155°C. The outer diameter of the end protection layer 131 is 1.6 mm.

[0036] The optical fiber protection layer 132 is coated on the outer surface of the sensing region 11B of the optical fiber part 11 and the outer surface of the other non-sensing region 11A, and protects the optical fiber part 11 from high temperature, chemical corrosion, and / or mechanical damage. In this embodiment, the optical fiber protection layer 132 is a polyimide coating layer, which has excellent high-temperature resistance, biocompatibility, and transparency, and can withstand a high temperature of 350°C. The thickness of the optical fiber protection layer 132 is very thin, and the outer diameter of the optical fiber protection layer 132 is 0.15 mm. In an alternative embodiment, the optical fiber protection layer 132 comprises a plurality of stacked polyimide films. In this embodiment, since the temperature sensor array optical fiber 10 needs to enter the human body with the interventional needle 30, and will be bent and twisted during the operation of the interventional needle 30, the optical fiber part 11 and the optical fiber protection layer 132 also need to have a certain flexibility. The optical fiber itself and the polyimide material also have good flexibility, which can meet the needs of the operation.

[0037] The plurality of sensing point protection parts 133 are respectively coated on the outer surfaces of the optical fiber part 11 or the optical fiber protection layer 132 at the respective temperature sensing points 112, and are used to protect the temperature sensing points 112. In this embodiment, the sensing point protection part 133 is a polyimide-based composite coating layer formed on the outer surface of the optical fiber part 11. The optical fiber protection layer 132 is further coated on the outside of the coating layer. The coating layer formed by the material has excellent high-temperature resistance, biocompatibility, and transparency, and can effectively prevent the optical fiber Bragg grating sensing point from being mechanically damaged and / or chemically corroded. In an alternative embodiment, the sensing point protection part 122 can also be a tiny shell made of a polyimide material, which is sleeved on the outer periphery of the optical fiber protection layer 132. In the case of using a tiny shell, the thickness of the shell needs to be made as thin as possible to avoid the optical fiber protection layer 132 on the outer layer being raised too high, and gaps being generated on both sides of the shell.

[0038] The first fixing part 134 is used to fix the non-sensing area 11B of the temperature sensor array optical fiber 10 and the intervention needle 30. In this embodiment, the first fixing part 134 is an adhesive part formed by an adhesive, that is, the outer surface of the end protection layer 131 is bonded to the outer surface of the intervention needle 30 by the adhesive. The selection of the adhesive needs to consider its compatibility with the materials of the optical fiber and the intervention needle, as well as the factors such as adhesive strength and high temperature resistance, and the thickness and distribution of the adhesive also need to be optimized to ensure that the temperature sensor array optical fiber 10 will not fall off or shift from the intervention needle 30 during the intervention operation; since the adhesive is used to bond the non-sensing area 11B, it is relatively thin. In this embodiment, the material of the adhesive is biodegradable adhesive, the thickness of which is less than 1 mm, the adhesive is arranged at the non-sensing area 11B, and the adhesive is not arranged within 2 mm at both ends of the non-sensing area 11B. The adhesive can withstand a high temperature of 200°C, so it can effectively bond the end protection layer 131 made of polyimide and the intervention needle made of metal, has good biocompatibility, and can adapt to the temperature in the thermal ablation minimally invasive surgery.

[0039] A plurality of temperature isolation parts 136 are respectively arranged between the outer surface of the optical fiber protection layer 132 at each temperature sensing point 112 and the outer surface of the intervention needle 30, and are used to isolate each temperature sensing point 112 from the surface of the intervention needle 30 to avoid direct contact and cause temperature measurement error. The temperature isolation part 136 is a bonding part formed by a non-heat-conducting glue, and for the same reason, the selection of the non-heat-conducting glue needs to consider factors such as thermal conductivity, adhesive strength, and biocompatibility. In this embodiment, the non-heat-conducting glue is a porous material, the thermal conductivity of which is less than or equal to 0.1 W / (m·K), and has good adhesive strength and biocompatibility, and the thickness of the non-heat-conducting glue is greater than 1 mm. The non-heat-conducting glue is arranged at the sensing area 11A and extends to 2 mm outside both ends of the sensing area 11A.

[0040] A plurality of second fixing parts 135 are used to fix the optical fiber protection layer 132 and the intervention needle 30. In this embodiment, the second fixing part 135 is a cylindrical high-thermal-conductivity metal sheet, which can be a copper sheet or a copper alloy sheet, and the axial length of each high-thermal-conductivity metal sheet is about 5 mm. After the temperature isolation part 136 (bonding part) is formed between the optical fiber protection layer 132 at each temperature sensing point 112 and the intervention needle 30, the second fixing part 135 (high-thermal-conductivity metal sheet) covers the optical fiber protection layer 132, the bonding part, and the outside of the intervention needle 30 at the fixed temperature sensing point 112, which further fixes them and also protects the temperature sensing point 112, without affecting the perception of temperature by each temperature sensing point 112.

[0041] In this embodiment, the number and position distribution of the temperature sensing points 112 in the temperature sensor array optical fiber 10 are accurately designed according to the needs and characteristics of the minimally invasive intervention surgery.

[0042] Figure 4 is a schematic diagram of the position distribution of the plurality of temperature sensing points in the temperature sensor array optical fiber in the embodiment.

[0043] As shown in Figure 4 , in the embodiment, considering the size, shape and temperature distribution characteristics of the surgical area in the minimally invasive interventional surgery of thermal ablation of tumor tissue, the number of temperature sensing points 112 is set to 30, and the position distribution of the 30 temperature sensing points 112 in the optical fiber part 11 is accurately designed.

[0044] Among them, the length of the non-sensing area 11A of the optical fiber part 11 (the distance from one end of the optical fiber part 11 to point A in the figure) is denoted as X in ; in the sensing area 11B, the distance between the first temperature sensing point 112 and the proximal end of the sensing area 11B is denoted as X1, the interval distance between the (n-1)th temperature sensing point 112 and the nth temperature sensing point 112 is denoted as X n , where n>1; the distance between the 30th (the one closest to the outer end of the sensing area 11B) temperature sensing point 112 and the outer end of the sensing area 11B is denoted as X out , X1>20mm, X out >1mm; optionally, X1<100mm and X n <50mm; optionally, X1>100mm and X n >50mm. In the embodiment, X in =100mm~300mm, X out = 10mm, X1= 110mm, X n = 60mm.

[0045] Figure 5 is a schematic diagram of the use state of the interventional surgical instrument in the embodiment.

[0046] As shown in Figure 5 , in use, the interface part 12 of the temperature sensor array optical fiber 10 is connected to the fiber grating demodulator 20, the fiber grating demodulator 20 can provide a light source (laser excitation) for the optical fiber, and obtain the reflected light of the plurality of temperature sensing points 112. After demodulating the reflected light, the corresponding real-time temperature data is obtained.

[0047] The fiber grating demodulator 20 can be further connected to a computing device 40, which can be a computer or a remote server with corresponding computing programs, capable of reconstructing the three-dimensional temperature field of the human tissue based on the real-time temperature data from the multiple temperature sensing points 112 of the fiber grating demodulator 20, and displaying the reconstructed temperature field distribution information on the display in the operating room, so as to provide the temperature field reference information for the doctor during the operation, facilitating the doctor to observe the effect of the ultrasonic transducer on the lesion site and the surrounding normal tissue.

[0048] Effects and advantages of the embodiments

[0049] The temperature sensor array fiber and the interventional surgical instrument provided by the embodiment include a fiber part and a packaging part, wherein the fiber part is fixed with the interventional needle through the packaging part, and the fiber is very thin, so it can enter the human body to reach the surgical area or its vicinity along with the interventional needle in the minimally invasive interventional surgery, thereby performing temperature monitoring, and the fiber has good toughness and can bend or twist along with the interventional needle, adapting to the needs of the surgery. Further, the core of the fiber body has multiple fiber Bragg gratings (FBG), forming multiple temperature sensing points, so that the temperature of multiple points in the surgical area and / or its vicinity can be monitored simultaneously through a row of multiple temperature sensing points. The fiber Bragg grating has high sensitivity and high resolution, and can accurately measure the slight temperature change, providing reliable data source for three-dimensional temperature field reconstruction. In addition, different protective layers are arranged in the sensing area and the non-sensing area of the fiber part according to their characteristics, and the protective layer of the non-sensing area is bonded with the interventional needle, and the protective layer of the sensing area is fixed with the interventional needle through multiple fixing parts, which can guarantee the fixing strength between the two, so that the fiber will not fall off or displace during movement along with the interventional needle, and at the same time, the fiber can not affect the perception of temperature.

[0050] In the embodiment, the size and position distribution of the multiple temperature sensing points are accurately designed according to the characteristics and needs of the thermal ablation minimally invasive surgery, so that the temperature field distribution covering the entire surgical area of interest can be reconstructed according to the real-time temperature data measured by the multiple temperature sensing points, and the accuracy of the temperature meets the requirements of the surgery.

[0051] Further, the non-sensing area of the fiber is coated with a glass fiber layer, which has certain high-temperature resistance and sufficient strength, and the sensing area of the fiber is coated with a polyimide layer, so that the sensing area can withstand high temperature up to 350℃, and the material has good biocompatibility, which can avoid affecting the human tissue, and the fiber itself and the polyimide layer also have certain toughness, which can bend or twist along with the interventional needle, and do not affect the conduction of optical signals, so they can well adapt to the needs of thermal ablation minimally invasive interventional surgery.

[0052] Further, the optical fiber at each temperature sensing point is further coated with a sensing point protection part, which is a polyimide coating, so as to better protect the sensitive temperature sensing point, and since it is a thin coating, it will not affect other packaging structures.

[0053] Further, the non-sensor region of the optical fiber is fixed to the intervention needle by an adhesive, and the sensing region of the optical fiber is fixed to the intervention needle by a plurality of high-thermal-conductivity metal sheets, and a temperature isolation part formed by a non-thermal-conductivity adhesive is further arranged between the outer layer of the sensing region and the intervention needle, so as to ensure the bonding strength therebetween, so that the temperature sensor array optical fiber will not fall off or displace relative to the intervention needle during the operation process, and the use of high-thermal-conductivity metal sheets will not substantially affect the sensing of temperature by each temperature sensing point, and the temperature isolation part can also avoid the influence of heat conduction from the intervention needle on the temperature sensing point, so as to ensure that accurate real-time temperature data can be stably and reliably measured during the minimally invasive operation, and a more accurate three-dimensional temperature field distribution can be obtained through inversion calculation.

[0054] Further, one end of the temperature sensor array optical fiber is a standard type interface part, which can be directly connected to a fiber grating demodulator during use, and the optical fiber is fixed to the intervention needle as an integrated product, which is very convenient to use and can reduce the operation preparation time when applied to minimally invasive intervention surgery.

[0055] The above embodiments are only used to illustrate the specific implementation of the present application, and the present application is not limited to the description range of the above embodiments, and those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principle of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

[0056] For example, in the above embodiments, the temperature field reconstruction system is used in minimally invasive intervention surgery for thermal ablation of tumor tissue, and in an alternative, the temperature field reconstruction system can also be used in other intervention surgeries, such as in cardiac intervention surgery, gynecological surgery, etc.

Claims

1. A temperature sensor array optical fiber for sensing temperature in a procedure area in an interventional procedure using an interventional needle, characterized by, The temperature sensor array fiber comprises: a fiber part comprising a fiber body and a plurality of temperature sensing points formed at an inner core of the fiber body, the temperature sensing points being fiber Bragg gratings; and a packaging part for packaging the fiber part, wherein the fiber part comprises a sensing region and a non-sensing region, the temperature sensing points are distributed in the sensing region, the packaging part comprises: an end protection layer comprising the non-sensing region; a fiber protection layer at least covering the sensing region; an adhesive part for fixing the end protection layer to the interventional needle; and a plurality of fixing parts respectively for fixing the fiber protection layer at each temperature sensor to the interventional needle.

2. The temperature sensor array fiber of claim 1, wherein, Further comprising: an interface part for connecting with a fiber grating demodulator, wherein both ends of the fiber part are the non-sensing regions, the end protection layer covers one of the non-sensing regions connected with the interface part, the fiber protection layer covers the sensing region and the other non-sensing region, the adhesive part is arranged between the end protection layer and the interventional needle, and the fixing parts are respectively arranged on the fiber protection layer at each temperature sensor and the interventional needle.

3. The temperature sensor array fiber according to claim 2, wherein: wherein the end protection layer is a glass fiber layer, the fiber protection layer is a polyimide layer, and the adhesive parts are a plurality of parts arranged in sequence with intervals.

4. The temperature sensor array fiber according to claim 2, wherein: wherein the fixing part is a metal sheet in a cylindrical shape, the axial length of which is greater than the grating length of the temperature sensing point, and the corresponding temperature sensing point is located in the middle of the axial direction of the fixing part, and the metal sheet is a copper sheet or a copper alloy sheet.

5. The temperature sensor array fiber according to claim 4, wherein: wherein, the packaging part further comprises: a plurality of temperature isolation parts which are adhesive parts composed of non-heat-conducting glue and are respectively arranged between the fiber protection layer at each temperature sensing point and the interventional needle for heat insulation.

6. The temperature sensor array fiber according to claim 4, wherein: wherein the packaging part further comprises: a plurality of sensing point protection parts respectively covering the fiber part or the fiber protection layer at each temperature sensing point, and the sensing point protection parts are polyimide coatings.

7. The temperature sensor array fiber according to claim 2, wherein: wherein the grating length of each temperature sensing point is 1mm-3.5mm, the number of temperature sensing points is 25-35, and the plurality of temperature sensing points are arranged at equal intervals.

8. The temperature sensor array fiber according to claim 7, wherein: wherein the length of the non-sensing region connected with the interface part is >20mm, the length of the other non-sensing region is >1mm, the distance from the temperature sensing point closest to the interface part to the proximal end of the fiber part is a first distance, and the distance between adjacent two temperature sensing points is a second distance, the first distance is <100mm and the second distance is <50mm.

9. The temperature sensor array fiber according to claim 7, characterized in that: wherein the length of one of the non-sensing regions connected to the interface section is > 20 mm, the length of the other non-sensing region is > 1 mm, the distance of the temperature sensing point closest to the interface section to the proximal end of the fiber section is a first distance, and the distance between two adjacent temperature sensing points is a second distance, the first distance < 100 mm and the second distance < 50 mm.

10. An interventional procedure instrument, characterized by comprising: an interventional needle; and a temperature sensor array fiber fixed to the interventional needle for entering a surgical region with the interventional needle and for temperature sensing in a minimally invasive interventional procedure, wherein the temperature sensor array fiber is according to any one of claims 1 to 9. ​

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