KR102151849B1 - Detector system for identifying lesion location in minimally invasive surgery - Google Patents

Abstract

The present invention relates to a lesion detection system for laparoscopic surgery, and more particularly, it is composed of a marker clip equipped with an electronic tag (RFID) by applying an existing endoscope hemostatic clip and a clip detector that detects the marker clip, and This is a technology related to a new laparoscopic lesion detection system in which the detection range is adjustable through the design of the electronic tag detector antenna.

Description

Lesion detection system for laparoscopic surgery {Detector system for identifying lesion location in minimally invasive surgery}

The present invention relates to a lesion detection system for laparoscopic surgery, and more particularly, consists of a clip detector that detects a mark clip equipped with an electronic tag (RFID) by applying an existing endoscope hemostatic clip, and a low-frequency electronic tag detector antenna This is a technology related to a new lesion detection system for laparoscopic surgery with adjustable detection range through design.

As for the existing abdominal surgery, laparotomy with laparotomy was the mainstream. Open surgery is a surgical method that has been used traditionally, and is still used frequently in modern medicine. However, open surgery has disadvantages such as a risk of wound infection, slow recovery after surgery, and a decrease in cosmetic satisfaction due to scars. As an alternative, laparoscopic gastrectomy, which was first introduced by Kitano in 1994 for gastric cancer, is a method of surgery by inserting a surgical instrument after a small perforation in the abdomen instead of laparotomy. With the development of laparoscopic surgical instruments and surgical techniques, and the increasing interest of patients and doctors on the quality of life, the surgical trend of gastrointestinal cancer is changing from laparoscopic surgery to laparoscopic surgery. Laparoscopic surgery is already recognized as the standard surgery for early gastric cancer, and several researchers report the superiority of laparoscopic surgery for advanced gastric cancer. Laparoscopic surgery has several advantages, such as less postoperative pain, quick recovery, and excellent cosmetic results compared to open surgery. However, it is difficult to touch the lesion by hand during surgery, and it may be difficult to determine the exact location of the lesion because the instrument is used. In particular, in the case of early lesions or benign lesions that grow into the lumen of the intestine, it may be difficult to determine the appropriate margin of resection by identifying the location of the lesion because the serous membrane is not marked.

In the case of gastrectomy, endoscopy during surgery or confirmation through X-ray was introduced, but it is not widely practiced in clinical practice due to the complexity of the process and the problem of cooperation with other departments, and colon resection is also injected with dye under the mucous membrane. As a result, a tattoo method to mark lesions was introduced. However, since the endoscopy is required before surgery, there are inconveniences to the patient and economic problems due to additional procedures. In particular, because the dye spreads rapidly, time passes after the tattoo method. The more quickly the effect declines. Due to these problems, there has been an unmet need for new medical technologies for lesion identification among doctors. There are some differences in opinion regarding the safety margin of gastric cancer, but the Japanese medical community currently recommends resecting the stomach with a margin of about 20 mm to 50 mm, 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 is increasing recently, and the demand for technology development to realize this is also continuing.

In the past, there has been a case of studying a method to check the location of the lesion during laparoscopic surgery using various methods.

In 2005, Hyung WJ et al. introduced a method of identifying lesions using laparoscopic ultrasound during surgery for gastric submucosal tumors growing into the lumen. This has the advantage of being able to perform easily and safely, but the operator is proficient in laparoscopic ultrasound techniques. It has a limitation that it may fail to confirm the lesion because the clip is small. In a 2011 report by Kim HI and 2 others, a method of finding preoperative clips through abdominal X-ray during surgery in 80 patients with early gastric cancer was presented. In 2014, Kim BS and 3 others used Radio-Opaque Gauze. A method of confirming the lesion after X-ray was reported. Several methods through gastroscopy were also introduced. Jeong O. and 3 others reported a self-transfusion tattoo method in which blood was collected from a patient in 2012 and injected into the lower layer of the gastric mucosa using a preoperative gastroscopy to mark lesions on the serous membrane. Xuan Y. and 3 others also reported Also, a method to check the location of the lesion in the gastric serous membrane was introduced by injecting dye under the gastric mucosa through an endoscope during surgery without installing a clip before surgery.

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. 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. 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. 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. 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, additional manipulations must be performed during surgery, or these results are not actually used in the clinical field due to problems such as skill, reliability, and persistence of the operator. Therefore, there has been a need for a technology development to overcome these shortcomings and mark the location of lesions that can be used in the actual clinical field.

An object of the present invention is to provide a lesion detection system for laparoscopic surgery, which consists of a clip detector for detecting a mark clip in the form of an electronic tag (RFID) attached, so that the operator can determine the location of the lesion without touching it during laparoscopic surgery. .

In addition, the present invention derives a correlation equation between the maximum sensing distance of the clip detector capable of detecting the mark clip and the induction coefficient for the antenna coil of the clip detector, and quantifies the detection range to control the lesion with high accuracy. We want to provide a detection system.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems to be solved by the present invention not mentioned here are to those of ordinary skill in the technical field to which the present invention belongs from the following description. It can be clearly understood.

A lesion detection system for laparoscopic surgery according to the present invention includes: a marker clip disposed adjacent to a lesion to be operated on and on which an electronic tag (RFID) is mounted so that the location of the lesion can be confirmed in a non-contact manner; And a clip detector configured to detect the mark clip without being touched, including an antenna coil for detecting the electronic tag, wherein the clip detector is capable of adjusting a maximum sensing distance capable of detecting the mark clip. It characterized in that it is provided to be.

In addition, in the lesion detection system for laparoscopic surgery according to the present invention, the mark clip is characterized in that it is formed in a cylindrical shape.

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

In addition, in the lesion detection system for laparoscopic surgery 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 is moved by the power transmission device. It characterized in that the induction coefficient is changed to adjust the maximum sensing distance of the mark clip.

In addition, in the lesion detection system for laparoscopic surgery according to the present invention, the induction coefficient of the antenna coil according to the maximum sensing distance of the preset mark clip is derived by Equations 1 to 3, and the preset A range in which the contact is moved by the dial is set using a maximum sensing distance and the derived coefficient of the antenna coil.

In addition, in the lesion detection system for laparoscopic surgery according to the present invention, the clip detector outputs a beep sound when detecting the mark clip.

By means of solving the above problems, the lesion detection system for laparoscopic surgery of the present invention has the effect of reducing the existing resection area to a minimum of 16% and a maximum of 50% or less during laparoscopic surgery.

In addition, the lesion detection system for laparoscopic surgery of the present invention can adjust the maximum detection distance that can detect the mark clip, and adjust it according to the thickness of the intestinal wall to effectively check the location of the lesion, thereby more clearly determining the resection site. I can.

In addition, the lesion detection system for laparoscopic surgery of the present invention includes perforation, which is a process of conventional laparoscopic surgery,-insertion of an endoscope-confirmation of the lesion using an endoscope and a detection needle-a form added to the endoscopic insertion process in the process of resection of the lesion using a resection device, etc. Because of this, it has the effect that it can be used without difficulty even for surgeons who are familiar with existing surgical methods.

In addition, the lesion detection system for laparoscopic surgery of the present invention has the effect of allowing the operator to complete all processes by himself without manipulating the patient during surgery or cooperating with other doctors and saving a lot of operation time.

1 is a view showing the form of a lesion detection system for laparoscopic surgery of the present invention to be used during laparoscopic surgery at an actual surgical site.
2 is a view for explaining the driving principle of RFID employed in the lesion detection system for laparoscopic surgery of the present invention.
3 is a view showing a state that the marking clip according to the present invention is actually installed on the stomach.
Figure 4 is a view showing the length of the cylindrical mark clip according to the present invention.
5 is a diagram showing a flat electronic tag (RFID).
6 is a graph of correlation regression analysis for the barrier thickness and the maximum sensing distance derived from an experiment of a flat electronic tag (RFID).
7 is a graph showing an ellipse corresponding to the maximum sensing distance of the top, bottom, left and right, derived as a result of experimenting with a cylindrical electronic tag (RFID).
8 is a maximum detection range (A) derived from an experiment of a flat electronic tag (RFID), an ideal maximum detection range (B) derived from an experiment of a cylindrical electronic tag (RFID), and an electron in the form of a cylinder. This is a graph showing the actual maximum detection range (C) derived as a result of experimenting with a tag (RFID).
10 is a perspective view of a clip detector of the lesion detection system for laparoscopic surgery according to the present invention.
11 is a prototype of a clip detector of the lesion detection system for laparoscopic surgery according to the present invention.
12 is a diagram illustrating an operation between an antenna coil and a dial for varying the maximum detection distance of the mark clip of the clip detector according to the present invention.
13 is a diagram showing a communication circuit for transmitting detection information of a clip detector according to the present invention to a PC.

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

A lesion detection system for laparoscopic surgery according to an embodiment of the present invention is disposed adjacent to a lesion to be operated on, and an electronic tag (RFID) mounted thereon so as to check the location of the lesion in a non-contact manner. ; And a clip detector 20 configured to detect the mark clip 10 without being touched, including an antenna coil 211 for detecting the electronic tag.

The lesion detection system for laparoscopic surgery of the present invention will be utilized in the form as shown in FIG. 1 at the actual laparoscopic surgery site, where A is the gastrointestinal region where the mark clip 10 is installed, and B is an endoscope and a clip detector 20 ) Is a built-in surgical detection needle, and C means a resection device that will remove the lesion. That is, the detection needle (B) is inserted into the body through a perforation during laparoscopic surgery, and after finding the location of the stomach through an endoscope, the mark clip 10 and the clip detector 20 are used to detect the exact location. Is to do.

Existing laparoscopic surgery is a process of perforation-endoscopic insertion-lesion confirmation using an endoscope and a detection needle-lesion resection using a resection device, etc., because the clip detector 20 is simply added to the endoscope insertion step. It can be said that it is also suitable for surgeons who are familiar with the surgical method. In addition, in view of the recent method of ending the entire process of resection and connection with laparoscopic surgery, the current organ resection is greatly affected by the skill of the operator, and it is not possible to extend the operation time and method to apply the method reported by the existing researchers. It is limited because of its complexity and the risk of having to manipulate an anesthetized patient. Therefore, the lesion detection system for laparoscopic surgery of the present invention has been developed in the direction of minimizing the dependence on the operator's skill level, minimizing the risk to the patient, and increasing the reliability while simplifying the procedure.

First, an electronic tag (RFID; Radio Frequency Identification) technology employed in the lesion detection system for laparoscopic surgery of the present invention will be described in detail.

Electronic tag (RFID) technology is a technology that can transmit data without physical contact using energy in the RF spectrum. The basic RFID system is composed of an electronic tag and an RFID tag detector. In the present invention, the electronic tag is formed of the mark clip 10, and the RFID tag detector is formed of the clip detector 20. 2 shows a driving principle of an electronic tag (RFID). Two RLC circuits each including the coil 11 of the marking clip 10 and the antenna coil 211 of the clip detector 20 can transmit signals using mutual induction. Since the electronic tag (RFD) technology uses radio waves, it has different characteristics depending on the frequency band of the radio wave, and the higher the frequency, the shorter the wavelength and the higher energy and the longest sensing distance.

In the present invention, since the marking clip 10 is attached to the human body, mainly the stomach and the large intestine, the high-frequency band or ultra-high-frequency band RFID having a low transmittance due to its short wavelength is difficult to use and relatively high energy. Because it is a pie, it has the potential to adversely affect body stability. Accordingly, the operating frequency of the clip detector of the present invention is designed in a low frequency band in the range of 125 to 134 kHz with a long wavelength and high transmittance.

In the following, each of the marking clip 10 and the clip detector 20 will be described in detail.

First, the mark clip 10 is an application of an existing endoscope hemostatic clip, and is manufactured as an integrated RFID clip by mounting an electronic tag (RFID) on the existing medical clip. The mark clip 10 is attached to the lesion site as shown in FIG. 3 by a separate means, and the mark clip 10 may have a length of about 11 mm as shown in FIG. 4.

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

In addition, the shape of the electronic tag (RFID) affects the shape of the sensing area and the sensing distance. In general, the larger the antenna volume is, the longer the sensing range is. In the present invention, the electronic tag (RFID) is configured in a cylindrical shape, and therefore the mark 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, examples and comparative examples were set as shown in Table 1 below to analyze the sensing distance and sensing range for each thickness of the barrier. In addition, it was proved that the resection range can be reduced compared to the standard resection range through experiments.

Example Cylindrical electronic tag Comparative example Flat type electronic tag

The cylindrical electronic tag (Example) used in the experiment is as shown in FIGS. 3 and 4, and the flat electronic tag (Example) is as shown in FIG. 5.

Both types of electronic tags were measured at two locations on the pig's upper body (cardia) and antrum, and the colon (thin) and thick (thick) two locations. At, the farthest distance at which the mark clip 10 is sensed by the clip detector 20 was measured, and 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, based on the position of the mark clip 10, the four directions of the upper, lower, left, and right points of each part are set to vertically cross each other, and each of the mark clips 10 ) Was measured the farthest distance to be detected, and in the case of the comparative example, since the surface area to be attached was wide, each measurement was performed 25 times.

1) Comparative example

As a result of the experiment, in the case of the comparative example, it was found that the upper body portion of the stomach was the thickest at 7 mm, and the thin large intestine portion was the thinnest at 2 mm. The longest distance at which an electronic tag (RFID) is recognized was measured differently depending on the thickness of the barrier, and the closest distance was 7mm and the farthest distance was 22mm. As can be seen from the results of Table 2 below, as the thickness of the barrier increases, the correlation of the maximum sensing distance decreases.

Organ part location Barrier thickness (mm) Maximum sensing distance (mm) Camouflage Upper body 4 8±1 Pre-government 6 13±2 Leader Thin part 2 17.5±4.5 Thick part 5 10.5±0.5

Referring to the correlation regression analysis graph of FIG. 6, since the shape of the antenna coil is flat, it can be seen that the thicker the barrier is, the more it is recognized in the vicinity of the center of the flat electronic tag.

2) Examples

As a result of the experiment, in the case of the Example, as shown in the results of Table 3 below, it can be seen that the deviation of the sensing distance is smaller than the experimental result of the Comparative Example (Table 2). The reason why the vestibule 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 but constricted, and the installation angle of the cylindrical electronic tag (RFID) is relatively large. It can be inferred that this result was produced by tilting.

long time
part location Barrier thickness (mm) Maximum sensing distance (mm) Ooh Left Prize Ha Camouflage Upper body 4 4.5±0.9 5.6±0.7 12.5±0.7 5.3±0.5 Pre-government 6 5.8±0.7 6.9±0.5 5.6±0.5 3.7±0.5 Leader thin
part 3 6.3±0.5 5.0±0.5 9.7±0.7 6.4±0.4 Thick
part 8 3.5±0.8 6.6±0.5 8.4±0.6 9.8±0.5

In laparoscopic surgery, since the resection is made in a circular shape by the standard distance of resection (20 to 50mm in Japanese standards) from the palpation point of the lesion to the outside, it is reasonable to evaluate the area of the ellipse from the point detected during the operation. can do. Therefore, the ellipse was derived using the maximum sensing distance of the top, bottom, left and right to evaluate the resected area.

The graph of FIG. 7 is an ellipse derived by assuming that these axes are parallel to the major axis and minor axis of the ellipse, since the upper and lower sides of the detection point and the left and right points are set to intersect each other vertically. The major axis, minor axis length, and area of each derived ellipse are shown in Table 4 below. The detection distance range is at most 12.5 mm and at least 5.0 mm, which tends to be smaller than the conventional surgical resection standard of 20 to 50 mm. In the experiment, a coil with a radius of 6 mm was used, and the measured sensing distance range is excluding this radius, and when ablation, the maximum 18.5 mm including the radius of the coil will be the accurate sensing distance range. 20 to 50 mm) of the standard range, it will be possible to reduce the ablated area to 1/4 compared to the existing one. In the comparative example experiment results, in the case of a flat electronic tag, the detection distance tends to decrease as the wall of the interior is thicker, but in the example experiment results, the area of the ellipse within the sensing range is generally constant regardless of the thickness. It was confirmed from 4.

Organ part location Barrier thickness(mm) Long axis (mm) Short axis(mm)

)area(

) Camouflage Upper body 4 18.1 10.6 150.62 Pre-government 6 12.5 8.5 83.86 Leader thin
part 3 14.7 13.4 154.67 Thick
part 8 15 13.4 157.74

As shown in FIG. 8, in the case of the planar type (A), the area becomes smaller in the height direction in the form of a torus or a sphere with a hole in the middle, so that the sensing range varies depending on the thickness, but in the case of the cylindrical (B) The area appeared relatively constant. Since the sensing range is constant regardless of the thickness in the interior wall thinner than the maximum sensing distance, convenience is expected to be high even when designing the clip detector 20 having a variable sensing distance later. However, in the case of a cylindrical electronic tag (RFID), deviation may appear due to inclination. Looking at the anterior part graph of FIG. 7, it can be inferred that the electronic tag installed in the anterior part with a thick camouflage wall is inclined, so that the shortening of the ellipse is shorter than that of other parts.

The detection range of the actual cylindrical electronic tag will be a case where both ends of the cylinder are cut in a round shape as shown in FIG. 8C. However, even in this case, since the range is smaller than the standard for resection during actual surgery, it can be viewed as a valid result. However, since the experiment was conducted in a constricted state rather than an expanded state, it is believed that there will be no significant effect during the actual operation.

Therefore, the lesion detection system for laparoscopic surgery of the present invention according to the present invention, as shown in Figure 9, so that the operator can easily detect using the clip detector 20, the operator has a cylindrical mark clip 10 on the stomach barrier. You will be able to install it.

Next, the clip detector 20 is a device that mutually guides the cylindrical electronic tag (RFID) of the mark clip 10 to detect the mark clip 10. In the present invention, the mark clip 10 It is provided to adjust the maximum detection distance that can be detected.

The clip detector 21 communicates in a capacitive manner using electromagnetic waves that are directly generated. This is a simpler design compared to an inductive method in which communication is performed by a signal in which a magnetic field directly generated is changed by an electronic tag, and has the advantage of being able to design various sensing distances. More specifically, the clip detector 21 may be designed in such a way that the response characteristics are changed using the size of the internal coil induction coefficient among capacitive methods.

The clip detector 20 includes the antenna coil 211 and an antenna wire 212 connected to a contact point of the antenna coil 211 and extending in one direction as shown in FIGS. 10 and 11. Antenna 21 including; And a body 22 connected to the end of the antenna 21.

The antenna coil 211 is located at the farthest end of the antenna 21 from the main body 22 and is mutually guided with the coil 11 of the marking tag 10.

The antenna wire 211 electrically connects between the antenna coil 211 and the main body 22, and as shown in FIG. 12, the antenna coil 211 and the antenna coil 211 are provided with two contact points 212a and 212b. Touch. The two contact points 212a and 212b are divided into a movable movable contact 212a and a fixed contact 212b, which will be described in detail as in the dial 223 to be described later.

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

The handle part 221 is designed to be convenient for the operator to use when detecting the mark clip 10 by inserting the clip detector 20 into an adapter tube used in laparoscopic surgery during surgery.

The electronic tag detection circuit 222 is formed in a structure in which the antenna coil 211 is mutually guided by the coil 11 of the mark clip 10 to detect the mark clip 10.

The dial 223 displays a plurality of modes according to the maximum sensing distance and can be selected as one of the plurality of modes by the operator. When the mode of the dial 223 is selected, the power transmission device The moving 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 contacts the fixed contact 212b in addition to the moving contact 212a, when the moving contact 212a moves, the antenna coil ( Since the number of turns of 211) is changed, the induction coefficient of the antenna coil 211 is also changed accordingly, so that the clip detector 20 can detect the mark clip 10 from the farthest distance. You can change the distance.

Here, the power transmission device may be appropriately selected by a person skilled in the art as long as it is a device capable of pushing and pulling the moving contact 212a such as a gear.

In order to accurately set the maximum detection distance, it would be desirable to derive a quantified relational expression between the maximum detection 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 marking clip 10 may be derived by Equations 1 to 3 below.

[Equation 1]

은 최대감지거리에서의 신호세기,here,

Is the signal strength at the maximum sensing distance,

는 상기 안테나코일의 중심으로부터 상기 전자태그의 코일 중심까지의 거리,

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

는 사용하는 전자기파 주파수의 파장길이,

Is the wavelength length of the electromagnetic wave frequency used,

는 전자기파가 한 개의 파장을 진행할 수 있는 신호세기,

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

는 회로에 의해 감쇠되는 신호세기,

Is the signal strength attenuated by the circuit,

는 안테나 회로에 의해서 얻는 이득이다.

Is the gain obtained by the antenna circuit.

은 일반적으로 RLC 회로의 차단 신호 세기인 -20dB로 설정한다.Especially,

Is generally set to -20dB, which is the blocking signal strength of the RLC circuit.

[Equation 2]

는 광속(299,792,458 m/s),here,

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

는 안테나 회로의 공진주파수이다.

Is the resonant frequency of the antenna circuit.

[Equation 3]

은 상기 안테나코일의 유도계수,here,

Is the induction coefficient of the antenna coil,

는 축전기의 전기용량이다.

Is the capacitance of the capacitor.

은 신호 세기 감소량을 의미하는 것으로, 이를 적용하여 원하는 거리

에서 최소한의 신호 세기를 구할 수 있다. 즉, 원하는 거리

가 설정되면, 상기 [수학식 1]로부터 사용하는 전자기파 주파수의 파장길이

을 도출할 수 있고, 도출된

은 상기 [수학식 2]로부터 안테나 회로의 공진주파수

을 도출할 수 있으며, 도출된

은 상기 [수학식 3]으로부터 변수인 안테나코일의 유도계수

을 구할 수 있는 것이다.Specifically, in [Equation 1]

Means the amount of signal intensity reduction, and 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 derive, derived

Is the resonance frequency of the antenna circuit from [Equation 2] above

Can be derived, and derived

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

Can be saved.

According to [Equation 1] to [Equation 3], using the derived coefficient of the antenna coil 211 that satisfies a preset maximum sensing distance, the antenna wire by the dial 223 (212a) It will be possible to accurately set the range in which the moving contact moves.

As described above, the clip detector 20 having a variable maximum sensing distance may allow the operator to select a mode according to the size or severity of the lesion site of the patient. Specifically, if the size of the lesion site is small and an initial symptom, the dial 223 will be adjusted so that the operation can be performed closer to the lesion area by reducing the induction coefficient to minimize the maximum sensing distance, whereas the size of the lesion area is large. If severe, the dial 223 will be adjusted in a manner that increases the induction factor to maximize the maximum sensing distance.

Meanwhile, as shown in FIG. 13, the clip detector 20 may be configured to communicate with a PC based on User Program Protocol (UDP) when the electronic tag detecting circuit 222 is detected. Therefore, the clip detector 20 is configured to output a beep sound when detecting the mark clip 10, so whether the operator detects the mark clip 10 without looking at the connected monitor screen, that is, the location of the lesion Can be easily identified.

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

It will be appreciated 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 by those skilled in the art.

Therefore, the embodiments described above are to be understood as illustrative and non-limiting in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and the All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

A: Camouflage area with marking clip installed
B: Surgical detection needle with built-in endoscope and clip detector
C: ablation mechanism
10: Marking clip
11: coil
20: clip detection unit
21: antenna
211: antenna coil
212: antenna wire
212a: Antenna wire (moving contact)
212b: Antenna wire (fixed contact)
22: main body
221: handle
222: electronic tag detection circuit
223: dial
224: MCU
24: Data selection department
30: discrimination unit

Claims (6)

A mark clip disposed adjacent to a lesion to be operated on and on which an electronic tag (RFID) is mounted so that the location of the lesion can be confirmed in a non-contact manner; And
Includes; a clip detector configured to detect the mark clip without touching it, including an antenna coil for detecting the electronic tag,
The clip detector is provided to adjust the maximum detection distance that can detect the mark clip,
The clip detector,
An antenna including the antenna coil and an antenna wire connected to a contact point of the antenna coil and disposed to extend in one direction; And
It is connected to the end of the antenna, the main body including a handle formed through a circular cross-sectional shape; includes,
The main body,
An electronic tag detection circuit for detecting the electronic tag; And
A lesion for laparoscopic surgery comprising: a power transmission device connected to the antenna wire is provided inside, and a plurality of modes are displayed according to a maximum sensing distance, so that a dial can be selected as one of the plurality of modes; Detection system.
The method of claim 1,
The mark clip is a lesion detection system for laparoscopic surgery, characterized in that formed in a cylindrical shape. delete The method of claim 1,
When the dial mode is selected, the contact point in contact with the antenna coil connected to the antenna wire is moved by the power transmission device, and accordingly, the induction coefficient of the antenna coil is changed and the maximum sensing distance of the mark clip Laparoscopic surgery lesion detection system, characterized in that the adjustment. The method of claim 4,
The induction coefficient of the antenna coil according to the maximum sensing distance of the preset mark clip is derived by Equations 1 to 3 below,
[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,

Is the wavelength length of the electromagnetic wave frequency used,

Is the signal strength at which an electromagnetic wave can travel through 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 resonance frequency of the antenna circuit,
[Equation 3]

here,

Is the induction coefficient of the antenna coil,

Is the capacitance of the capacitor,
A lesion detection system for laparoscopic surgery, characterized in that the range in which the contact is moved by the dial is set using the preset maximum sensing distance and the derived coefficient of the antenna coil.
The method of claim 1,
The clip detector is a lesion detection system for laparoscopic surgery, characterized in that outputting a beep sound when detecting the mark clip.

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