Search

KR-102962604-B1 - RADIOFREQUENCY ABLATION INSTRUMENT FOR PANCREATIC CYSTIC LESIONS WITH BUILT-IN SPHEROID-SHAPE SELF-EXPANDABLE ELECTRODE

KR102962604B1KR 102962604 B1KR102962604 B1KR 102962604B1KR-102962604-B1

Abstract

A high-frequency small action medical device is disclosed. This high-frequency cauterization medical device comprises a guide catheter movable to a lesion site of an organ, and an electrode catheter disposed in the guide catheter so as to be inserted into and removed from the end of the guide catheter and providing a shape memory electrode for cauterization of the lesion site, wherein the guide catheter may include an outer tube, an inner tube having an outer surface spaced apart from the inner surface of the outer tube and providing a catheter flow path through which the electrode catheter can move, and a suction flow path formed between the outer tube and the inner tube to aspirate lesion fluid generated at the lesion site.

Inventors

  • 박정훈
  • 이상수
  • 박유빈
  • 원동성

Assignees

  • 재단법인 아산사회복지재단
  • 울산대학교 산학협력단

Dates

Publication Date
20260512
Application Date
20230327

Claims (8)

  1. A guide catheter movable to the site of the organ lesion; and It includes an electrode catheter disposed in the guide catheter so as to be inserted into and removed from the end of the guide catheter, and providing a shape memory electrode for cauterization of the lesion site. The above guide catheter is Outer tube; An inner tube having an outer surface smaller than the inner surface of the outer tube so that the outer surface is spaced apart from the inner surface of the outer tube, and providing a catheter passage in which the electrode catheter can move; A suction channel formed between the outer tube and the inner tube to aspirate lesion fluid generated at the lesion site; and It includes a support member disposed in the suction channel to support the outer surface of the inner tube and the inner surface of the outer tube, and The above support members are provided in a plurality of units spaced apart in the circumferential direction between the inner tube and the outer tube, and A plurality of the above-mentioned support members are arranged spaced apart from each other at a distance greater than the circumferential length of the support members. High-frequency reduction medical device.
  2. delete
  3. In Article 1, The above guide catheter is The outer tube and the inner tube are connected at the end, and the device further includes a handle through which the electrode catheter passes inside. High-frequency reduction medical device.
  4. In Paragraph 3, The above handle is A handle body portion that provides a handle passage through which the above electrode catheter can move; A handle suction part formed to communicate with the suction path to provide suction force to the suction path; and A handle fixer portion for fixing the electrode catheter, High-frequency reduction medical device.
  5. In Article 1, The end of the above guide catheter is Providing a fine needle shape formed at an angle in the longitudinal direction, High-frequency reduction medical device.
  6. In Article 1, The above electrode catheter A moving rod movable along the above catheter passage; A shape memory electrode disposed at one end of the above-mentioned moving rod and capable of shape memory for an expanded state shape; and A catheter pusher connected to the other end of the moving rod, High-frequency reduction medical device.
  7. In Article 6, The above shape memory electrode is A mesh structure having a shape corresponding to the shape of the lesion site so as to adhere to the lesion site when expanded, High-frequency reduction medical device.
  8. In Article 6, The above shape memory electrode is When the catheter pusher moves relative to the guide catheter, it is withdrawn from the guide catheter, and when the catheter pusher moves relative to the guide catheter, it is inserted into and retrieved from the guide catheter. High-frequency reduction medical device.

Description

Radiofrequency ablation instrument for pancreatic cystic lesions with built-in speroid-shape self-expandable electrode The present invention relates to a high-frequency cauterizing medical device for pancreatic cystic lesions having a built-in round self-expanding electrode. Generally, the treatment of cystic pancreatic lesions involves surgical resection when the lesion causes symptoms or is deemed to pose a risk of malignancy, or periodic follow-up otherwise. Despite advancements in surgical techniques, postoperative morbidity is reported to remain high, ranging from 15% to 30%. Furthermore, since it is difficult to accurately assess the risk of malignancy based solely on imaging findings and tissue specimens obtained via endoscopic ultrasound, this treatment approach may be insufficient for managing the diverse range of pancreatic cystic lesions. Additionally, as the understanding of pancreatic cystic lesions deepens, criteria for surgical indications are being applied more strictly. Consequently, there is a demand for the development of relatively safe, minimally invasive, and effective treatment methods. In line with these changes, EUS-guided Radiofrequency Ablation (EUS-RFA) is currently being used for minimally invasive endoscopic ultrasound treatment. Radiofrequency ablation is a method that treats lesions using a heat-generating transducer, and EUS-guided RFA is performed by directly accessing the pancreas and surrounding lesions through the walls of the stomach and duodenum. In this method, fine-needle electrodes are used to access the pancreas, and thin micro-needle electrodes are required for procedures on areas such as the pancreatic process or head. While fine-needle electrodes facilitate access, complete resection requires repeated procedures with varying directions in a fan-like pattern after reaching the lesion; in contrast, micro-needle electrodes may be difficult to perform repeatedly due to their slender structure. FIG. 1 is a configuration diagram illustrating a high-frequency small action medical device according to one embodiment of the present invention. FIG. 2 is a state diagram illustrating the state when the electrode catheter is withdrawn in a high-frequency small action medical device according to one embodiment of the present invention. Figure 3 is a cross-sectional view of the "AA" portion of Figure 1 cut open. Figure 4 is a cross-sectional view of the "BB" portion of Figure 1 cut open. FIG. 5 is a diagram illustrating the state in which a high-frequency small action medical device according to one embodiment of the present invention is guided to a lesion site by an endoscope device. FIG. 6 is a diagram illustrating the state in which a guide catheter of a high-frequency small action medical device according to one embodiment of the present invention enters a lesion site and sucks up the lesion fluid from the lesion site. FIG. 7 is a diagram illustrating the state in which the electrode catheter is discharged from the electrode catheter of a high-frequency small action medical device according to one embodiment of the present invention and expanded at the lesion site. FIG. 8 is a diagram illustrating the state in which an electrode catheter of a high-frequency cauterizing medical device according to one embodiment of the invention cauterizes a lesion site. Hereinafter, specific embodiments for implementing the concept of the present invention will be described in detail with reference to the drawings. In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted. Furthermore, when it is stated that one component is 'connected,' 'supported,' 'connected,' 'supplied,' 'transmitted,' or 'contacted' with another component, it should be understood that while the connection, support, connection, supply, transmission, or contact may be direct to that other component, there may also be other components present in between. The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, it should be noted in advance that expressions such as "upper side," "lower side," and "side" in this specification are described based on the drawings, and may be expressed differently if the orientation of the object changes. For the same reason, some components in the attached drawings may be exaggerated, omitted, or schematically depicted, and the size of each component does not entirely reflect its actual size. Additionally, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but such components are not limited by such terms. These terms are used solely for the purpose of distinguishing one component from another. The mea