WO2020045883A1 - Lesion sensing system for laparoscopic surgery - Google Patents

Abstract

The present invention relates to a lesion sensing system for laparoscopic surgery and, more specifically, to a new technology relating to a lesion sensing system for laparoscopic surgery, the system comprising: a marking clip configured by applying an existing endoscopic hemostatic clip, so as to include an electronic tag (RFID) mounted therein; and a clip sensor for detecting the marking clip, wherein a sensing range can be adjusted by antenna designing of a low-frequency electronic tag sensor. [Representative drawing] figure 1

Description

Laparoscopic Lesion Detection System

The present invention relates to a laparoscopic lesion detection system, and more specifically, consisting of a clip detector for detecting a marker clip mounted with an electronic tag (RFID) by applying a conventional endoscope hemostatic clip, low-frequency electromagnetic tag detector antenna Design of a new laparoscopic lesion detection system with adjustable detection range through design.

Conventional abdominal surgery has been followed by laparotomy with open abdomen. Laparotomy is a traditional surgical technique that is still used frequently in modern medicine. However, laparotomy has disadvantages such as risk of wound infection, slow recovery after surgery, and deterioration of cosmetic satisfaction due to scarring. As an alternative, Laparoscopic gastrectomy, first introduced by Kitano in 1994 for gastric cancer, attempted to overcome the above-mentioned shortcomings of laparotomy by inserting a surgical tool into the abdomen instead of the abdomen. With the development of laparoscopic surgery instruments and surgical techniques and the increasing interest of patients and doctors about the quality of life, the surgical trend of gastrointestinal cancer has recently shifted from laparotomy to laparoscopic surgery. Laparoscopic surgery has already been recognized as a standard operation in early gastric cancer, and many researchers have reported excellent laparoscopy for advanced gastric cancer. Laparoscopic surgery has several advantages over laparotomy, including less postoperative pain, faster recovery, and better cosmetic results. However, it is difficult to palpate the lesion by hand during surgery, and it may be difficult to determine the exact location of the lesion because of the use of instruments. In particular, early lesions or benign lesions growing into the lumen of the intestine may not be marked by the tabernacle, so it may be difficult to determine the location of the appropriate resection margin.

In the case of gastrectomy, endoscopy during surgery or X-ray imaging method was introduced, but it is not widely used in clinical practice due to the complexity of the process and collaboration with other departments, and colorectal resection is also injected into the mucosa. Although the tattoo method was used to mark lesions, there was an economic problem due to the patient's discomfort and additional procedures because the endoscopy had to be done one more time before surgery, and especially since the dye spreads rapidly, The more quickly the effect falls. These problems led to unmet demand for new medical technologies for identifying lesions. Although there are some differences in opinion about the safety margin of gastric cancer, Japanese medical community recommends cutting the stomach with a margin of about 20mm to 50mm, and the domestic medical community generally follows these standards. However, in order to improve the quality of life after surgery, interest in minimally invasive surgery has recently increased, and the demand for technology development for realizing this has been continued.

Previously, there have been cases of using various methods to determine the location of lesions during laparoscopic surgery.

In 2005, Hyung WJ and two others introduced a method to identify lesions using laparoscopic ultrasound during gastric submucosal tumors growing into the lumen, which can be easily and safely performed. It has a limitation that it can fail to identify the lesion because of the small size of the clip. In a 2011 report, Kim HI and two others presented a method to detect preoperatively installed abdominal X-rays in 80 early gastric cancer patients.In 2014, Kim BS and three others used Radio-Opaque Gauze. We reported a method to identify lesions after X-ray. Various methods through gastroscopy were also introduced. Jeong O. et al. Reported a self-transfusion tattoo method in which blood was collected from the patient in 2012 and injected into the lower mucosa of the gastric mucosa with a preoperative gastroscope. In addition, the method was used to identify the location of the lesion on the gastrointestinal mucosa by injecting a dye under the gastric mucosa through an endoscope during surgery without installing a clip before surgery.

[Non-Patent Documents]

(1) Hyung W. J, Lim J, et al., “Intraoperative tumor localization using laparoscopic ultrasonography in laparoscopic-assisted gastrectomy” Surgical Endoscopy And Other Interventional Techniques, 2005, 19: 1353-1357.

(2) Kim H. I, Hyung W. J, et al., “Intraoperative portable abdominal radiograph for tumor localization: a simple and accurate method for laparoscopic gastrectomy” Surgical Endoscopy, 2011, 25: 958-963.

(3) Kim B. Su, Yook J. H, et al., “A simplified technique for tumor localization using preoperative endoscopic clipping and radio-opaque markers during totally laparoscopic gastrectomy” The American Surgeon 2014, 80: 1266-1270.

(4) Jeong O, Cho S. B, et al., “Novel technique for intraoperative tumor localization during totally laparoscopic distal gastrectomy: endoscopic autologous blood tattooing” Surgical Endoscopy, 2012, 26: 1778-1783.

(5) Xuan Y, Hur H, et al., “Efficacy of intraoperative gastroscopy for tumor localization in totally laparoscopic distal gastrectomy for cancer in the middle third of the stomach” Surgical Endoscopy, 2013, 27: 4364-4370.

As can be seen from the research results of the non-patent documents 1 to 5, such operations are not actually utilized in the clinical field due to problems such as skill, reliability, and persistence of the operator. Therefore, there is a need to develop a technology for overcoming these shortcomings and marking the location of lesions that can be used in actual clinical settings.

 The present invention is to provide a laparoscopic surgical lesion detection system consisting of a clip detector for detecting a marker clip of the addition of an electronic tag (RFID), the operator can determine the location of the lesion without palpation during laparoscopic surgery. .

In addition, the present invention derives the correlation of the maximum detection distance of the clip detector that can detect the marker clip and the induction coefficient for the antenna coil of the clip detector, quantitative detection range to laparoscopic surgical lesion that can be adjusted with high accuracy To provide a detection system.

The problem to be solved by the present invention is not limited to the above-mentioned problem, another problem to be solved by the present invention not mentioned herein is to those of ordinary skill in the art from the following description It will be clearly understood.

Laparoscopic lesion detection system according to the present invention, is disposed adjacent to the lesion to be operated, the marker clip is mounted on the electronic tag (RFID) so that the location of the lesion in a non-contact manner; And a clip detector configured to detect the marker clip without palpation, including an antenna coil for detecting the electronic tag, wherein the clip detector can adjust a maximum detection distance capable of detecting the marker clip. It is characterized in that it is provided to.

In addition, in the laparoscopic surgical lesion detection system according to the present invention, the marker clip is characterized in that formed in a cylindrical shape.

In addition, in a laparoscopic surgical lesion detection system according to the present invention, the clip detector, the antenna comprising an antenna wire connected to the antenna coil, the contact point of the antenna coil and arranged to extend in one direction; And a main body connected to an end of the antenna, the main body including a handle formed to penetrate in a circular cross-sectional shape, wherein the main body comprises: an electronic tag detecting circuit for sensing the electronic tag; And a dial having a power transmission device connected to the antenna wire therein and having a plurality of modes displayed according to the maximum sensing distance so as to be selected as one of the plurality of modes.

In addition, in the laparoscopic surgical lesion detection system according to the present invention, when the mode of the dial is selected, the contact point in contact with the antenna coil connected to the antenna wire by the power transmission device is moved, accordingly the Induction coefficient is changed, characterized in that the maximum detection distance of the marker clip is adjusted.

In the laparoscopic surgical lesion detection system according to the present invention, the induction coefficient of the antenna coil according to the maximum sensing distance of the predetermined marker clip is derived by Equation 1 to Equation 3, And a range in which the contact is moved by the dial by using the maximum sensing distance and the derived induction coefficient of the antenna coil.

In addition, in the laparoscopic surgical lesion detection system according to the present invention, the clip detector is characterized in that for outputting a beep sound when detecting the marker clip.

By the means for solving the above problems, the lesion detection system for laparoscopic surgery of the present invention, there is an effect that can reduce the existing excision area to at least 16%, up to 50% or less during laparoscopic surgery.

In addition, the laparoscopic lesion detection system of the present invention can adjust the maximum detection distance that can detect the marker clip, by adjusting it according to the thickness of the barrier to effectively determine the location of the lesion to determine the resection site more clearly Can be.

In addition, the laparoscopic lesion detection system of the present invention is a type of addition to the endoscope insertion process in the process of resection of the lesion using a perforation-endoscopic insertion-endoscope and detection needle-a resection instrument, etc. Because of this, there is an effect that can be used without difficulty even for the operator who is familiar with the existing surgical method.

In addition, the laparoscopic lesion detection system of the present invention, the operation can be completed by the operator alone without the operation of the patient or the cooperation of other surgeries, it is effective to save a lot of surgery time.

1 is a view showing the shape of the laparoscopic surgery lesion detection system of the present invention to be used in the actual laparoscopic surgery in the surgical field.

2 is a view for explaining the driving principle of the RFID employed in the laparoscopic surgical lesion detection system of the present invention.

3 is a view showing a state in which the marker clip according to the invention is actually installed in the stomach.

4 is a view showing the length of the cylindrical marker clip in accordance with the present invention.

5 is a diagram illustrating an electronic tag (RFID) in a planar form.

FIG. 6 is a correlation regression graph for barrier thickness and maximum sensing distance derived from experiments of planar electronic tags (RFID).

FIG. 7 is a graph showing ellipses corresponding to the maximum sensing distance up, down, left, and right derived from experiments of a cylindrical RFID.

8 shows the maximum detection range (A) derived from the experiment of the planar electronic tag (RFID), the ideal maximum detection range (B) derived from the experiment of the cylindrical electron tag (RFID), and the cylindrical electron. It is a graph showing the actual maximum detection range (C) derived from the experiment of the tag (RFID).

10 is a perspective view of a clip sensor of the laparoscopic surgical lesion detection system according to the present invention.

11 is a prototype of the clip detector of the laparoscopic surgical lesion detection system according to the present invention.

12 is a view showing an operation between the antenna coil and the dial for varying the maximum detection distance of the marker clip of the clip sensor according to the present invention.

FIG. 13 is a diagram illustrating a communication circuit for transmitting sensing information of a clip sensor according to the present invention to a PC.

Specific matters including the problem to be solved, the means for solving the problem, and the effects of the present invention as described above are included in the following embodiments and the drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Laparoscopic lesion detection system according to an embodiment of the present invention is disposed adjacent to the lesion to be operated, the marker clip 10 is equipped with an electronic tag (RFID) so that the location of the lesion in a non-contact manner ; And a clip detector 20 configured to detect the marker clip 10 without palpation, including an antenna coil 211 detecting the electronic tag.

Laparoscopic surgical lesion detection system of the present invention will be utilized in the form as shown in Figure 1 in the actual laparoscopic surgery site, where A is the gastrointestinal site where the marker clip 10 is installed, B is the endoscope and clip detector (20) A surgical needle with a built-in), and C means an ablation apparatus to remove the lesion site. That is, the detection needle (B) is inserted into the body through the perforation during laparoscopy, finds the position of the stomach through the endoscope, and then uses the marker clip 10 and the clip detector 20 to detect the correct position. It is.

Existing laparoscopy is a process of perforation-endoscope insertion-confirmation of lesions using endoscopes and detection needles-during the resection of the lesion using a resection instrument, the clip detector 20 is simply added to the endoscope insertion step. It may also be suitable for surgeons who are familiar with surgical methods. In addition, in view of the recent method of ending the entire process of organ resection and connection with laparoscopic surgery, the current organ resection is greatly influenced by the skill of the operator and the length of operation time is not enough to apply the methods reported by the existing researchers. Due to its complexity, the risk of manipulating anesthetized patients is limited. Therefore, the laparoscopic lesion detection system of the present invention has been developed in such a way as to reduce the dependence on the skill of the operator as much as possible, minimize the risk to the patient, and increase the reliability while simplifying the technique.

First, the radio frequency identification (RFID) technology employed in the laparoscopic surgical lesion detection system of the present invention will be described in detail.

Electronic tagging (RFID) technology uses energy in the RF spectrum to transmit data without physical contact. Basic RFID system is composed of an electronic tag and an RFID tag detector, in the present invention, the electronic tag is formed on the marker clip 10, the RFID tag detector is formed of the clip detector 20. 2 illustrates a driving principle of an electronic tag (RFID). Two RLC circuits each including the coil 11 of the marker clip 10 and the antenna coil 211 of the clip sensor 20 may transmit signals using mutual induction. Since RFD technology uses radio waves, they have different characteristics depending on the frequency band of radio waves. The higher the frequency, the shorter the wavelength, the higher the energy, and the longest detection distance.

In the present invention, since the marker clip 10 is mainly attached to the stomach and the large intestine in the human body, RFID having a short wavelength and low permeability or a high frequency band having a high transmittance is difficult to use and has a relatively high energy. Pies can adversely affect your stability. Therefore, the operating frequency of the clip detector of the present invention is designed to a low frequency band in the range of 125 to 134 kHz with long wavelength and high transmittance.

Hereinafter, the marker clip 10 and the clip sensor 20 will be described in detail.

First, the marker clip 10 is applied to the conventional endoscope hemostatic clip, the electronic clip (RFID) is mounted on the existing medical clip is manufactured as an RFID integrated clip. The marker clip 10 is attached to the lesion site as shown in Figure 3 by a separate means, the marker clip 10 may have a length of about 11mm as shown in FIG.

The electronic tag (RFID) is composed of an integrated circuit chip containing an antenna and unique data, and may be classified into a passive tag and an active tag according to whether power is supplied. In the present invention, the electronic tag (RFID) is a passive tag that operates only with an induced current of the clip sensor 20 without power supply because the electronic tag is used only for sensing, not for data transmission.

In addition, the shape of the RFID affects the shape of the sensing area and the sensing distance. In general, the wider the antenna volume, the longer the sensing range. In the present invention, the electronic tag (RFID) is formed in a cylindrical shape, and thus the marker clip 10 is also formed in a cylindrical shape.

Experimental Example

In order to prove more effective when the shape of the electronic tag (RFID) is cylindrical, an example and a comparative example were set as shown in Table 1 below to analyze the sensing distance and detection range for each thickness of the barrier. In addition, experiments have demonstrated that the ablation range can be reduced compared to the standard ablation range.

TABLE 1

Cylindrical electronic tags (examples) used in the experiments are as shown in Figs. 3 and 4, and planar electronic tags (examples) are as shown in Fig. 5.

Both types of electronic tags were measured at two positions, the cardia and anterior part of the pig, and the colon was a total of two positions, thin and thick. In the clip sensor 20 was measured the farthest distance that the marker clip 10 is detected, the thickness of each part was also measured to analyze the correlation between the thickness and the sensing distance.

In the case of the embodiment, since the surface area to be attached is narrow, the up, down, left, right points of each direction based on the position of the marker clip 10 is set so as to vertically cross each, the marker clip (10 times each) ) The longest distance is detected, and in the comparative example, since the surface area to be attached is wide, it was measured 25 times each.

1) Comparative Example

As a result of the experiment, in the comparative example, the upper part of the stomach was thickest with 7 mm, and the thin intestine was thinnest with 2 mm. The longest distance at which RFID was recognized was measured differently depending on the thickness of the barrier, the closest distance was 7mm and the longest distance was 22mm. As shown in the results in Table 2 below, the maximum sensing distance was correlated with increasing thickness of the barrier.

TABLE 2

Referring to the correlation regression graph of FIG. 6, since the shape of the antenna coil is flat, the thicker the barrier, the closer the center of the planar electronic tag is to be recognized.

2) Example

As a result of the experiment, in the case of the Example, as shown in the results of Table 3, it can be seen that the deviation of the sensing distance is smaller than the experimental results (Table 2) of the comparative example. The reason why the antrum is more different from other parts is because it is the thickest part of the stomach. In the experimental state, the inside of the stomach is not expanded and narrowed, and the installation angle of the cylindrical RFID is relatively large. It can be inferred that this result is tilted.

TABLE 3

During laparoscopic surgery, the ablation of the oval from the palpation point of the lesion to the outside is performed by a standard distance (20 to 50 mm). Therefore, it is reasonable to evaluate the area of the ellipse from the point detected during surgery. can do. Therefore, an ellipse was derived using the maximum sensing distance of the top, bottom, left and right to evaluate the area of ablation.

The graph of FIG. 7 is an ellipse derived assuming that these axes are parallel to the long axis and short axis of the ellipse since the upper and lower detection points and the left and right points cross each other perpendicularly. The long axis, short axis length, and area of each derived ellipse are shown in Table 4 below. Sensing range is up to 12.5 mm, at least 5.0 mm, all tend to be smaller than the existing surgical resection 20 to 50 mm. In the experiment, the coil radius was 6 mm, and the measured sensing distance range was excluded this radius. When cutting, the maximum sensing distance range of 18.5 mm including the coil radius would be the accurate sensing distance range. 20 to 50 mm) of the standard range can be reduced to 1/4 the ablation area compared to the conventional level. In the experimental results of the comparative example, in the case of the planar electronic tag, the thicker the wall of the interior, the detection distance tended to be smaller. It was confirmed from 4.

TABLE 4

As shown in FIG. 8, in the case of the plane type A, the area decreases in the height direction in the form of a torus or a sphere with a hole in the middle thereof, and thus the detection range varies depending on the thickness. The area is relatively constant. Since the sensing range is constant regardless of thickness in the embedded wall thinner than the maximum sensing distance, it is expected that the convenience will be high even when designing the clip sensor 20 having a variable sensing distance later. However, in the case of a cylindrical electronic tag (RFID), the deviation may appear as it is tilted. Looking at the graph of the front government of FIG. 7 it can be inferred that the short of the ellipse is shorter than the other parts because the electronic tag installed in the thick front government camouflage wall is inclined.

The detection range of the actual cylindrical electronic tag may be a case in which the ends of the cylindrical ends are cut off as shown in FIG. 8C. In this case, however, the range is smaller than the standard of ablation at the time of actual surgery, so it can be regarded as a valid result. However, since the experiment was performed in a constricted state rather than in the expanded state, it is expected that there will be no significant effect in actual surgery.

Therefore, the laparoscopic surgical lesion detection system of the present invention according to the present invention, as shown in Figure 9, so that the operator can easily detect using the clip sensor 20 cylindrical marker clip 10 on the stomach barrier You can install it.

Next, the clip detector 20 is a device for detecting the marker clip 10 by inducing with the cylindrical electronic tag (RFID) of the marker clip 10, in the present invention of the marker clip 10 It is designed to adjust the maximum detectable distance.

The clip detector 21 communicates in a capacitive manner using directly generated electromagnetic waves. This is a simpler design than the inductive method in which a magnetic field generated directly by the electronic tag changes the communication, and has a merit of designing various sensing distances. More specifically, the clip detector 21 may be designed in a manner of changing a response characteristic by using a magnitude of an internal coil induction coefficient among capacitive methods.

As shown in FIGS. 10 and 11, the clip detector 20 includes an antenna wire 212 connected to the antenna coil 211 and a contact point of the antenna coil 211 and disposed to extend in one direction. An antenna 21 comprising; And a main body 22 connected to an end of the antenna 21.

The antenna coil 211 is located at the end farthest from the main body 22 in the antenna 21, and mutually induced with the coil 11 of the mark tag 10.

The antenna wire 211 is electrically connected between the antenna coil 211 and the main body 22. As shown in FIG. 12, the antenna wire 211 is connected to the antenna coil 211 through two contacts 212a and 212b. Contact The two contacts 212a and 212b are divided into a movable contact 212a and a fixed contact 212b, which will be described in detail as shown in the dial 223 to be described later.

The main body 22 has a handle portion 221 is formed through the circular cross-sectional shape; An electronic tag detecting circuit (222) for detecting the electronic tag (RFID); And a dial 223 having a power transmission device (not shown) connected to the antenna wire 212 therein, and displaying a plurality of modes according to the maximum sensing distance so as to be selected as one of the plurality of modes. It includes.

The handle part 221 is designed to be easy for the operator to use when the clip detector 20 is inserted into the adapter tube used in laparoscopic surgery at the time of surgery to detect the marker clip 10.

The electronic tag detection circuit 222 has a structure in which the antenna coil 211 is induced by the coil 11 of the marker clip 10 to detect the marker clip 10.

The dial 223 may be displayed in a plurality of modes according to the maximum sensing distance, and may be selected by the operator as one of the plurality of modes. When the mode of the dial 223 is selected, the power transmission device selects the mode. The movable contact 212a in contact with the antenna coil 211 connected to the antenna wire 212 is moved. As shown in FIG. 12, since the antenna coil 211 is in contact with the fixed contact 212b described above in addition to the movable contact 212a, when the movable contact 212a moves, the antenna coil ( Since the number of turns of 211 is changed, the induction coefficient of the antenna coil 211 also changes accordingly, so that the clip detector 20 can finally detect the marker clip 10 at the longest distance. It can change the distance.

Here, the power transmission device may be appropriately selected by those skilled in the art as long as the power transmission device is a device capable of pushing and pulling the movable contact 212a.

In order to accurately set the maximum sensing distance, it may be desirable to derive a quantified relation between the maximum sensing distance and the induction coefficient of the antenna coil 211.

The induction coefficient of the antenna coil 211 according to the maximum sensing distance of the marker clip 10 can be derived by the following equations (1) to (3).

[Equation 1]

here,

Is the signal strength at the maximum sensing distance,

Is the distance from the center of the antenna coil to the center of the coil of the electronic tag,

The wavelength length of the electromagnetic wave frequency used,

Is the signal strength at which an electromagnetic wave can travel one wavelength,

Is the signal strength attenuated by the circuit,

Is the gain obtained by the antenna circuit.

Especially,

Is typically set to -20dB, the blocking signal strength of the RLC circuit.

[Equation 2]

here,

Is the speed of light (299,792,458 m / s),

Is the resonant frequency of the antenna circuit.

[Equation 3]

here,

Is the induction coefficient of the antenna coil,

Is the capacitance of the capacitor.

Looking specifically, the [Equation 1]

Denotes the amount of signal strength reduction, and the applied distance is applied to the desired distance.

The minimum signal strength can be obtained from. That is, the desired distance

When is set, the wavelength length of the electromagnetic wave frequency used from Equation 1

Can be derived,

Is the resonance frequency of the antenna circuit from Equation 2 above.

Can be derived

Is the induction coefficient of the antenna coil as a variable from [Equation 3]

Can be obtained.

According to Equation 1 to Equation 3, when the induction coefficient of the antenna coil 211 derived to satisfy a preset maximum sensing distance is used, the antenna wire is connected by the dial 223. (212a) It may be possible to accurately set the moving range of the moving contact.

As described above, the clip detector 20 having a variable maximum sensing distance may select a mode according to the size or severity of the lesion site of the patient. Specifically, if the lesion site size is small and the initial symptom, the induction coefficient is reduced to minimize the maximum detection distance, so that the dial 223 may be adjusted to allow surgery near the lesion site, while the lesion site size is large. If severe, the dial 223 will be adjusted in a manner that increases the induction coefficient to maximize the maximum sensing distance.

Meanwhile, as illustrated in FIG. 13, the clip detector 20 may be configured to communicate with a PC based on a user program protocol (UDP) when the electronic tag detection circuit 222 is detected. Therefore, the clip detector 20 is configured to output a beep when detecting the marker clip 10, so that the operator can detect the marker clip 10 without looking at the connected monitor screen, that is, the position of the lesion. Can be easily identified.

On the other hand, the communication is made of the MCU of the clip sensor 20 UDP client, PC to the UDP server, the communication speed between the average of 1ms or less as a test result, which is a speed that will not affect the electronic tag detection. Furthermore, the clip detector 20 may be made in wireless communication with a PC.

It will be understood by those skilled in the art that the above-described technical configuration of the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

[Description of the code]

A: gastrointestinal site with marker clip

B: Surgical probe with built-in endoscope and clip detector

C: ablation apparatus

10: Marker clip

11: coil

20: clip detection unit

21: antenna

211: antenna coil

212: antenna wire

212a: Antenna wire (mobile contact)

212b: Antenna wire (fixed contact)

22: main body

221: handle portion

222: electronic tag detection circuit

223 dial

224: MCU

24: data selection

30: discrimination unit

Claims (5)

1. A marker clip disposed adjacent to the lesion to be operated and mounted with an electronic tag (RFID) so as to check the position of the lesion in a non-contact manner; And

   And a clip detector configured to detect the marker clip without palpation, including an antenna coil detecting the electronic tag.

   The clip detector is a laparoscopic surgical lesion detection system, characterized in that it is provided to adjust the maximum detection distance capable of detecting the marker clip.
2. The method of claim 1,

   The marker clip is a laparoscopic surgical lesion detection system, characterized in that formed in a cylindrical shape.
3. The method of claim 1,

   The clip detector,

   An antenna including an antenna wire connected to the antenna coil and a contact point of the antenna coil and arranged to extend in one direction; And

   A main body connected to an end of the antenna and including a handle portion formed to penetrate through a circular cross-sectional shape,

   The main body,

   An electronic tag detection circuit for detecting the electronic tag; And

   Laparoscopic surgical lesions, comprising: a power transmission device connected to the antenna wire is provided therein, a plurality of modes are displayed according to the maximum sensing distance, and the dial can be selected from one of the plurality of modes. Detection system.
4. The method of claim 3,

   When the mode of the dial is selected, the contact point in contact with the antenna coil connected to the antenna wire by the power transmission device is moved, and accordingly the induction coefficient of the antenna coil is changed so that the maximum sensing distance of the marker clip is changed. Laparoscopic surgical lesion detection system characterized in that is adjusted.
5. The method of claim 4, wherein

   The induction coefficient of the antenna coil according to the maximum detection distance of the predetermined marker clip is derived by the following Equations 1 to 3,

   [Equation 1]

   

   here,

   

   Is the signal strength at the maximum sensing distance,

   

   Is the distance from the center of the antenna coil to the center of the coil of the electronic tag,

   

   The wavelength length of the electromagnetic wave frequency used,

   

   Is the signal strength at which an electromagnetic wave can travel one wavelength,

   

   Is the signal strength attenuated by the circuit,

   

   Is the gain obtained by the antenna circuit,

   [Equation 2]

   

   here,

   

   Is the speed of light (299,792,458 m / s),

   

   Is the resonant frequency of the antenna circuit,

   [Equation 3]

   

   here,

   

   Is the induction coefficient of the antenna coil,

   

   Is the capacitance of the capacitor,

   Laparoscopic surgical lesion detection system, characterized in that for setting the range that the contact is moved by the dial using the predetermined maximum detection distance and the derived induction coefficient of the antenna coil.

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