JP6392132B2 - Detection device and extraction site placement container - Google Patents

Description

  The present invention relates to a detection device for confirming whether or not a sentinel lymph node (SLN = Sentinel Lymph Node) is contained in an excision site extracted from the body, and an excision site placement container used therefor.

  Sentinel lymph node biopsy is one of the diagnosis of cancer metastasis in cancer treatment. This is a diagnostic method for diagnosing that if there is no metastasis in the sentinel lymph node, there is no subsequent cancer metastasis to the lymphatic system. Therefore, if the sentinel lymph node is removed and examined, and no metastasis is found, the subsequent lymph node dissection site can be minimized.

  Conventionally, in breast cancer, a radioisotope drug that emits gamma rays and a blue dye are administered around the tumor, and before surgery, the gamma probe that is a gamma ray detector is used to find the approximate position of the sentinel lymph node, At the time of surgery, the sentinel lymph node was visually identified by staining with a pigment. However, in this method, since a radioisotope drug is used, there has been a problem that patients and medical workers are exposed to radiation. Another problem is that expensive equipment is required to handle radioisotope drugs. Therefore, there is a method of identifying the position of the sentinel lymph node by detecting the magnetic fluid injected around the tumor as a tracer (see, for example, Patent Document 1).

  The sentinel lymph nodes thus identified at the time of surgery are removed from the body and finally pathologically examined. At that time, prior to the pathological examination, an operation for confirming whether the excised site contains a sentinel lymph node containing the identified magnetic fluid is performed. This confirmation work is performed, for example, by using a handgun type detection device used for a human body during surgery as it is, and bringing the extracted part close to the tip of the probe of the detection device manually.

  Therefore, it has been necessary to perform pretreatment such as wrapping the extracted part with a film, which has a problem of taking time. In addition, since the extracted part is brought close to the tip of the probe by hand, positioning and position fixing are not stable, detection accuracy varies greatly depending on how the probe is pressed against the probe tip, and it is difficult to perform confirmation work quickly and accurately. there were. Further, when a plurality of lymph nodes are removed as a unit, there is a problem that it is necessary to perform confirmation work for each lymph node, which is troublesome. Until the result of the pathological examination is obtained, the patient remains in the state during the operation, that is, the affected part is opened. Therefore, the confirmation work needs to be performed quickly and accurately.

JP 2013-226407 A

  The present invention has been made based on such a problem, and a detection device capable of quickly and accurately confirming whether or not a sentinel lymph node is included in an excision site extracted from the body, and an excision site placement used for the detection device The purpose is to provide a container.

  The detection device of the present invention is for confirming whether or not the sentinel lymph node is included in the excision site extracted from the body, and is placed on the placement unit for placing the excision site It is provided with a sensor for detecting a magnetic substance or a radioactive substance, which is disposed so as to have a predetermined positional relationship with respect to the extracted site.

  The extracted part mounting container of the present invention is used as a mounting part in the detection device of the present invention, and is formed with a concave receiving part for mounting the extracted part.

  According to the detection apparatus of the present invention, it is provided with a placement unit for placing the extraction site and a sensor disposed so as to have a predetermined positional relationship with the extraction site placed on the placement unit. Therefore, by placing the extraction site on the mounting portion, the sensor and the extraction site can be easily set in a predetermined positional relationship. Therefore, it is possible to quickly and accurately confirm whether or not the sentinel lymph node is included in the excision site.

  In particular, if the receiving portion is provided with a concave receiving portion for mounting the extraction site, the mounting position of the extraction site can be easily determined.

  In addition, if the placement part is constituted by an extraction part placement container having a concave receiving part for placing the extraction part and arranged on the base, the extraction part is placed on the reception part and placed on the base. By arranging, the sensor and the extraction site can be easily in a predetermined positional relationship. In addition, if the extraction site placement container is exchanged corresponding to each extraction site, there is no need to clean the placement unit every time, and the confirmation operation can be performed easily.

  In addition, if the placement unit is movable relative to the sensor, the sentinel lymph node containing a magnetic substance or a radioactive substance approaches the sensor when the excision site includes a plurality of lymph nodes. Sometimes the sensor detects so that it can be easily determined which of the multiple lymph nodes is the sentinel lymph node.

  Furthermore, if a plurality of sensors are arranged and provided, when a plurality of lymph nodes are included in the excision site, a sensor in the vicinity of the sentinel lymph node containing a magnetic substance or a radioactive substance detects the position of the sensor. Thus, it is possible to easily determine which of a plurality of lymph nodes is a sentinel lymph node.

  In addition, when the sensor detects a magnetic substance or radioactive substance, an optical display that notifies the detection by light is provided in or adjacent to the sensor, or both, so that the sensor detects the magnetic substance or radioactive substance. This can be easily confirmed by light and its position.

  Furthermore, when the sensor detects a magnetic substance or a radioactive substance, a detection position indication unit that displays the detection position detected by the sensor on the display unit so as to be superimposed on the image of the extracted part is displayed. The position of the sentinel lymph node containing the magnetic substance or radioactive substance can be easily confirmed.

It is a figure showing the structure of the detection apparatus which concerns on the 1st Embodiment of this invention. It is a figure showing the structure of the detection apparatus which concerns on the 2nd Embodiment of this invention. It is a figure showing the structure of the detection apparatus which concerns on the 3rd Embodiment of this invention. It is a figure showing the structure of the detection apparatus which concerns on the 4th Embodiment of this invention. It is a figure showing the structure of the detection apparatus which concerns on the 5th Embodiment of this invention. It is a figure showing the structure of the detection apparatus which concerns on the 6th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 shows a configuration of a detection apparatus 10 according to the first embodiment of the present invention. For example, in the sentinel lymph node biopsy, the detection device 10 confirms whether the extracted site M extracted from the body contains the sentinel lymph node M1 containing a magnetic fluid or a radioactive substance. This detection device 10 is disposed so as to have a predetermined positional relationship with respect to the placement portion 11 on which the extraction site M is placed and the extraction portion M placed on the placement portion 11. And a sensor 12 for detecting a radioactive substance.

  For example, as shown in FIG. 1A, the mounting portion 11 is preferably provided with a concave receiving portion 11 </ b> A for mounting the extraction site M. If comprised in this way, since the mounting position of the extraction site | part M can be easily positioned by putting the extraction site | part M in the receiving part 11A, it is preferable. Further, the receiving portion 11A has a smaller area of the lower mounting portion than the area of the upper opening portion, and an inclined portion 11B inclined inward from the upper opening portion toward the lower mounting portion on the inner side surface. Is preferably provided.

  The excised site M removed from the body is soft, slimy, unshaped, and has blood and body fluids attached to it, and it is difficult to handle because it is as small as a few millimeters. This is because it is difficult to mount with good reproducibility. According to this receiving part 11A, since the area of the upper opening is large, it is easy to put in the extracted part M, and the extracted part M placed in the receiving part 111A is guided by the inclined part 11B and has a small area. Therefore, even if the excision site M is inserted from a position away from the optimum position, it can be placed at a predetermined position with good reproducibility.

  In FIG. 1A, the inner surface of the receiving portion 11A is an inclined portion 11B, and the receiving portion 11A is an inverted truncated cone shape or an inverted truncated pyramid shape, but may be an inverted cone shape or an inverted truncated pyramid shape. Further, as shown in FIG. 1B, a part of the inner surface of the receiving portion 11A may be an inclined portion 11B. Even if comprised in this way, since the extraction site | part M can be guide | induced and mounted in the lower mounting part with a small area, it is preferable.

  Furthermore, in FIGS. 1A and 1B, the case where the receiving portion 11A is provided on the placement portion 11 has been described. For example, as illustrated in FIG. 1C, the guide member 11C that supports the extraction site M And the extraction site M may be supported by the guide member 11C.

  The sensor 12 is preferably disposed on the surface of the placement unit 11 or in the vicinity of the surface, for example. For example, as shown in FIGS. 1 (A) and 1 (B), when the receiving portion 11 is provided with a concave receiving portion 11A, on the surface of the lower mounting portion of the receiving portion 11A or in the vicinity of the surface. The sensor 12 is preferably disposed, and the sensor 12 is preferably disposed so that the high sensitivity region of the sensor 12 is positioned corresponding to the lower mounting portion of the receiving portion 11A. For example, when the coil-type sensor 12 is used, the detection sensitivity increases near the center of the coil, and therefore it is preferable that the lower mounting portion of the receiving portion 11A is positioned near the center of the coil. In addition, when there is a high sensitivity region at the center of the tip of the sensor 12, it is preferable that the lower placement portion of the receiving portion 11 </ b> A is positioned near the center of the tip of the sensor 12. Further, in the case of the sensor 12 having a high sensitivity region in the yoke gap portion, it is preferable that the lower placement portion of the receiving portion 11A is positioned in the vicinity of the yoke gap portion.

  Further, for example, as shown in FIG. 1C, when a guide member 11C is provided on the mounting portion 11 to support the extraction site M, the bottom of the extraction site M supported by the guide member 11C is in contact with It is preferable to arrange the sensor 12 on the surface of the mounting portion 11 to be arranged or in the vicinity of the surface. This is because the distance between the extraction site M and the sensor 12 can be reduced, and the detection accuracy can be increased.

  Further, when the sensor 12 is easily affected by temperature or pressure, a space is provided between the detection unit of the sensor 12 and the extraction part M or the mounting unit 11 so as not to directly contact with each other. It is preferable. This is because fluctuations in the sensing performance of the sensor 12 due to changes in temperature and pressure when the extraction site M is placed on the placement unit 11 can be suppressed. One sensor 12 or a plurality of sensors 12 may be provided.

  Furthermore, it is preferable that the detection device 10 includes a notification unit 13 that notifies the detection when the sensor 12 detects a magnetic substance or a radioactive substance, for example. The notification unit 13 is preferably configured to notify the confirmation operator that the magnetic substance or radioactive substance has been detected, for example, by displaying a numerical value corresponding to the intensity of the detected magnetic signal or radiation signal. In addition, for example, the notification unit 13 confirms, by sound or light, that a magnetic substance or radioactive substance has been detected in addition to or in addition to the function of displaying a numerical value corresponding to the intensity of the magnetic signal or radiation signal. You may comprise so that it may notify.

  In this detection device 10, for example, when an excision site M extracted from the body is placed on the placement unit 11, a sensor is used when the excision site M includes a sentinel lymph node M1 containing a magnetic substance or a radioactive substance. 12, the magnetic substance or radioactive substance contained in the sentinel lymph node M <b> 1 is detected, and the notification is notified to the confirmation operator by the notification unit 13. Further, when the excision site M does not include the sentinel lymph node M1 containing the magnetic substance or the radioactive substance, the sensor 12 does not detect the magnetic substance or the radioactive substance, and the notification unit 13 does not operate.

  As described above, according to the present embodiment, the placement unit 11 on which the extraction site M is placed and the extraction site M placed on the placement unit 11 are arranged in a predetermined positional relationship. Since the sensor 12 is provided, the sensor 12 and the extraction part M can be easily set in a predetermined positional relationship by placing the extraction part M on the mounting part 11. Therefore, it is possible to quickly and accurately confirm whether or not the extracted site M contains the sentinel lymph node M1.

  In particular, if the receiving portion 11A for placing the extraction site M is provided on the placement portion 11, the placement position of the extraction site M can be easily determined. Further, the area of the lower mounting portion is made smaller than the area of the upper opening portion of the receiving portion 11A, and an inclined portion 11B that is inclined inward from the upper opening portion toward the lower mounting portion is provided on the inner surface. By doing so, the excision site M can be placed at a predetermined position with good reproducibility.

(Second Embodiment)
FIG. 2 shows the configuration of the detection apparatus 20 according to the second embodiment of the present invention. The detection device 20 includes a mounting portion 21 that includes an extraction site mounting container, and includes a base 24 on which the mounting portion 21 is disposed. The configuration is the same as that of the embodiment. Therefore, constituent elements corresponding to those in the first embodiment are denoted by reference numerals in which the tens place is changed to 2, and detailed description thereof is omitted.

  The extraction site placement container constituting the placement portion 21 has, for example, a concave receiving portion 21 </ b> A and is detachable from the base 24. As described in the first embodiment, the receiving portion 21A has a smaller area of the lower placement portion than the area of the upper opening portion, and the inner placement surface has the lower placement portion from the upper opening portion. It is preferable that an inclined portion 21B inclined toward the inside is provided. For example, as described in the first embodiment, as shown in FIGS. 2A, 2C, and 2D, the inner surface of the receiving portion 21A is an inclined portion 21B, and the receiving portion 21A is an inverted frustoconical or inverted shape. A pyramid shape may be used, and an inverted cone shape or an inverted pyramid shape may be used. Furthermore, as shown in FIG. 2B, a part of the inner surface of the receiving portion 21A may be an inclined portion 21B.

  Moreover, it is preferable that the extraction site | part mounting container has the holding part 21D which can be hold | gripped by hand, without contacting the base 24, when arrange | positioning on the base 24. FIG. This is because even if the extraction site M is touched by the hand that is soiled with blood or the like and the extraction site placement container is held by the hand, the soil does not adhere to the base 24, and therefore the base 24 does not need to be washed. For example, as shown in FIGS. 2 (A), (B), and (C), the upper portion of the extraction site placement container may be formed so as to protrude from the base 24, and the protruding portion may be the gripping portion 21D. As shown in FIG. 2D, a gripping portion 21D may be formed by extending a part upward from the extraction site placement container.

  The extraction site placement container is preferably made of, for example, a non-magnetic material or a non-metallic material. This is because the detection capability of the sensor 22 including a magnetic substance or a radioactive substance can be improved. Specifically, it is preferable that the extraction site placement container is made of, for example, a synthetic resin. Further, as will be described in a fifth embodiment to be described later, when the position of the sentinel lymph node M1 is indicated by the light display unit 55, it is preferable to use a material and thickness that transmit light.

  For example, as shown in FIGS. 2A, 2B, and 2D, the base 24 may be provided with an arrangement recess 24A in which the extraction site placement container is arranged. ), A container support member 24B that supports the extraction site placement container may be provided. If comprised in this way, since the extraction site | part mounting container can be easily arrange | positioned in the decided place of the base 24, and the mounting position of the extraction site | part M can be positioned easily, it is preferable. The contact area between the extraction site placement container and the base 24 is preferably reduced when the sensor 22 is susceptible to temperature. This is because the heat of the extraction site M can be made difficult to be transmitted to the base 24 via the extraction site mounting container, and therefore the sensing performance of the sensor 22 can be prevented from fluctuating due to a temperature change.

  The sensor 22 is preferably disposed on the surface of the base 24 or in the vicinity of the surface, for example. For example, as shown in FIGS. 2A, 2 </ b> B, and 2 </ b> D, when the placement recess 24 </ b> A is provided in the base 24, the sensor 22 is placed on the surface of the bottom of the placement recess 24 </ b> A or in the vicinity of the surface. Is preferred. Further, for example, as shown in FIG. 2C, when the container support member 24B is provided on the base 24, the base 24 with which the bottom of the extraction site placement container supported by the container support member 24B comes into contact. It is preferable to arrange the sensor 22 on or near the surface. In any case, as described in the first embodiment, it is preferable to arrange the sensor 22 so that the high sensitivity region is located corresponding to the lower mounting portion of the receiving portion 21A. Similarly to the first embodiment, when the sensor 12 is susceptible to temperature and pressure, the detection unit of the sensor 12 and the extraction site placement container or base 24 are in direct contact with each other. In order to avoid this, it is preferable to provide a space between them. This is because fluctuations in the sensing performance of the sensor 22 can be suppressed.

  As described above, according to the present embodiment, if the placement portion 21 is configured by the extraction site placement container and arranged on the base 24, the extraction site M is placed on the receiving portion 21A and the base. By arranging in 24, the sensor 22 and the extraction site | part M can be made into a predetermined positional relationship easily. Moreover, if the extraction site | part mounting container is replaced | exchanged corresponding to the extraction site | part M separately, there will be no trouble of cleaning the mounting part 21 every time, and a confirmation operation can be performed simply.

  If the grasping part is provided on the extraction site placement container, even if the extraction site M is touched and held with a hand that is soiled with blood or the like, the dirt is not attached to the base 24. The confirmation work can be easily performed.

(Third embodiment)
FIG. 3 shows a configuration of a detection device 30 according to the third embodiment of the present invention. The detection device 30 has the same configuration as that of the second embodiment except that the placement unit 31 is movable relative to the sensor 32. Therefore, components corresponding to those in the second embodiment are denoted by reference numerals in which the tens place is changed to 3, and detailed description thereof is omitted.

  For example, the detection device 30 includes a moving unit that moves the placement unit 31 and the sensor 32 relatively, although not shown. The moving means may be configured to move the mounting unit 31 with the sensor 32 and the base 34 fixed, or may move the sensor 32 and the base 34 with the mounting unit 31 fixed. The mounting unit 31 and the base 34 may be fixed and the sensor 32 may be moved. As a result, when the excision site M includes a plurality of lymph nodes, the sensor 32 detects when the sentinel lymph node M1 containing the magnetic substance or the radioactive substance approaches the sensor 32. Is easily sentinel lymph node M1. In FIG. 3, the sentinel lymph node M1 containing a magnetic substance or a radioactive substance is shown in black, and the lymph nodes other than the sentinel lymph node M1 are shown in white.

(Fourth embodiment)
FIG. 4 shows a configuration of a detection device 40 according to the fourth embodiment of the present invention. Also in FIG. 4, the sentinel lymph node M1 containing a magnetic substance or a radioactive substance is shown in black, and the lymph nodes other than the sentinel lymph node M1 are shown in white. This detection device 40 has the same configuration as that of the second embodiment except that a plurality of sensors 42 are arranged. Therefore, constituent elements corresponding to those of the second embodiment are denoted by reference numerals in which the tens place is changed to 4, and detailed description thereof is omitted. Note that this embodiment can also be applied to the first embodiment.

  The sensors 42 are arranged in a matrix, for example, on the surface of the base 44 or the vicinity of the surface with which the bottom of the mounting portion 41 contacts. The notification unit 43 is configured to notify which sensor 42 has detected a magnetic substance or a radioactive substance, for example. As a result, in the case where a plurality of lymph nodes are included in the excision site M, the sensor 42 near the sentinel lymph node M1 containing the magnetic substance or radioactive substance detects, so depending on the position of the sensor 42, the plurality of lymph nodes It can be easily determined which of them is the sentinel lymph node M1.

(Fifth embodiment)
FIG. 5 shows a configuration of a detection device 50 according to the fifth embodiment of the present invention. Also in FIG. 5, the sentinel lymph node M1 containing a magnetic substance or a radioactive substance is shown in black, and the lymph nodes other than the sentinel lymph node M1 are shown in white. This detection device 50 is different from the notification unit 43 in that it includes a light display unit 55 that notifies the detection by light when the sensor 52 detects a magnetic substance or a radioactive substance. It has the same configuration. Therefore, constituent elements corresponding to those of the fourth embodiment are denoted by reference numerals in which the tens place is changed to 5, and detailed description thereof is omitted. The detection device 50 may include a notification unit 43. In addition, this embodiment can be applied to other embodiments.

  The light display part 55 notifies the position where the sensor 52 detected the magnetic substance or radioactive substance by light, for example. The light display unit 55 is preferably formed of, for example, a light emitting element, and is provided in or adjacent to the sensor 52 or both. Thereby, it is possible to easily confirm that the sensor 52 has detected the magnetic substance or the radioactive substance and its position with light while looking at the excision site M. Moreover, the light display part 55 is comprised, for example with a laser light emitting element, and the sensor 52 irradiates a laser beam to the position which the sensor 52 detected the magnetic body or radioactive substance from the upper part of the extraction part M, and the sensor 52 is a magnetic body. Or you may comprise so that the position which detected the radioactive substance may be notified.

(Sixth embodiment)
FIG. 6 shows a configuration of a detection device 60 according to the sixth embodiment of the present invention. Also in FIG. 6, the sentinel lymph node M1 containing a magnetic substance or a radioactive substance is shown in black, and the lymph nodes other than the sentinel lymph node M1 are shown in white. The detection device 60 is replaced with a notification unit 43, and an imaging unit 66 that images the extracted portion M placed on the placement unit 61, and a video display unit such as a monitor that displays an image captured by the imaging unit 66. 67 and a detection position instruction unit 68 for displaying the detection position detected by the sensor 62 on the image display unit 67 so as to overlap the image of the extraction site M when the sensor 62 detects a magnetic substance or a radioactive substance. Other than the above, the configuration is the same as that of the fourth embodiment. Therefore, constituent elements corresponding to those of the fourth embodiment are denoted by reference numerals in which the tens place is changed to 6, and detailed description thereof is omitted. The detection device 60 may include a notification unit 43. In addition, this embodiment can be applied to other embodiments. According to the present embodiment, the position of the sentinel lymph node containing the magnetic substance or radioactive substance can be easily confirmed by looking at the display on the video display unit 67.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in each of the above embodiments, each component has been specifically described. However, not all the components may be provided, and other components may be provided. Further, in the second to sixth embodiments, the case where the mounting portions 21, 31, 41, 51, and 61 are made detachable has been described.

  It can be used when confirming whether or not a sentinel lymph node is included in the excision site excised from the body.

  10, 20, 30, 40, 50, 60 ... detecting device, 11, 21, 31, 41, 51, 61 ... placing portion, 11A, 21A, 31A, 41A, 51A, 61A ... receiving portion, 11B, 21B31B, 41B, 51B, 61B ... inclined part, 11C ... guide member, 12, 22, 32, 42, 52, 62 ... sensor, 13, 23, 33, 43 ... notification part, 24, 34, 44, 54, 64 ... base 21D ... Grasping part, 24A ... Arrangement concave part, 24B ... Container support member, 55 ... Light display part, 66 ... Imaging part, 67 ... Video display part, 68 ... Detection position instruction part, M ... Extraction site, M1 ... Sentinel Lymph nodes

Claims (18)

A detection device for confirming whether or not a sentinel lymph node is included in an excision site removed from the body,
A placement section for placing the extracted site;
A detection apparatus comprising: a sensor that detects a magnetic substance or a radioactive substance, and is disposed so as to have a predetermined positional relationship with respect to the extracted portion placed on the placement unit.   The detection device according to claim 1, wherein the placement portion includes a concave receiving portion on which the extraction site is placed. The mounting portion is configured by an extraction site placement container having a concave receiving portion for mounting the extraction site,
The detection apparatus according to claim 1, further comprising a base on which the placement unit is disposed.   The receiving portion has a smaller area of the lower placement portion than the area of the upper opening portion, and an inclined portion that is inclined inward from the upper opening portion toward the lower placement portion is provided on the inner side surface. The detection device according to claim 2 or claim 3, wherein   The detection device according to claim 4, wherein the sensor is disposed so that a high-sensitivity region is located corresponding to the lower mounting portion of the receiving portion.   The detection device according to claim 3, wherein the extraction site placement container has a grip portion that can be gripped by a hand without contacting the base when placed on the base.   The detection device according to claim 1, wherein the placement unit is movable relative to the sensor.   The detection device according to claim 1, wherein a plurality of the sensors are arranged.   The detection device according to claim 1, further comprising a light display unit that notifies detection by light when the sensor detects a magnetic substance or a radioactive substance.   The detection device according to claim 9, wherein the light display unit is built in, adjacent to, or both of the sensor.   The detection device according to claim 9, wherein the light display unit is configured by a laser light emitting element that irradiates a laser beam at a position where a magnetic material or a radioactive substance is detected by the sensor. An imaging unit that images the extracted portion placed on the placement unit;
A video display unit for displaying video captured by the imaging unit;
And a detection position indicating unit that displays a detection position detected by the sensor on the display unit so as to be superimposed on an image of the extraction site when the sensor detects a magnetic substance or a radioactive substance. Item 2. The detection device according to Item 1.   When the sensor detects a magnetic substance or a radioactive substance, the sensor is provided with a notification unit for notifying that a magnetic substance or a radioactive substance has been detected by displaying a numerical value corresponding to the intensity of the detected magnetic signal or radiation signal. The detection device according to claim 1, characterized in that:   4. The extraction part mounting container according to claim 3, wherein the extraction part mounting container is used as a placement part, and a concave receiving part for mounting the extraction part is formed.   The receiving portion has a smaller area of the lower placement portion than the area of the upper opening portion, and an inclined portion that is inclined inward from the upper opening portion toward the lower placement portion is provided on the inner side surface. The extraction site | part mounting container of Claim 14 characterized by the above-mentioned.   The extraction site placement container according to claim 14 or 15, further comprising a grip portion that can be gripped by hand without being in contact with the base when placed on the base.   The extraction part placement container according to any one of claims 14 to 16, wherein the extraction part placement container is made of a nonmagnetic material.   The extraction site placement container according to any one of claims 14 to 17, wherein the extraction site placement container is made of a non-metallic material.

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