US-12616830-B2 - Lead structure for applying electrical stimulation to body organ, and electrode system using same

US12616830B2US 12616830 B2US12616830 B2US 12616830B2US-12616830-B2

Abstract

A lead structure includes a lead having an electrode wire having one end provided as an insertion portion to be inserted into a body and the other end provided as an interface portion for connection with an external device, a first electrode in the insertion portion to transmit electrical stimulation to body organs, a second electrode on the interface portion to receive electrical stimulation applied from outside, and a signal line configured to interconnect the first electrode and the second electrode and transmit the electrical stimulation received by the second electrode to the first electrode; and a lead case configured to surround the lead, and a conductive plate configured to apply electrical stimulation to body organs and a support plate configured to provide electrical stimulation from the first electrode to the conductive plate by contacting the first electrode.

Inventors

Eun Kyoung Park
Tae Kyung Kim
Tae Woo Kim
Dong Il CHOI
Kyu Sung Lee

Assignees

SAMSUNG LIFE PUBLIC WELFARE FOUNDATION

Dates

Publication Date: 20260505
Application Date: 20210330
Priority Date: 20200428

Claims (5)

1 . A lead structure configured to apply electrical stimulation to body organs, the lead structure comprising: a lead comprising an electrode wire having one end provided as an insertion portion to be inserted into a body and the other end provided as an interface portion for connection with an external device, a first electrode in the insertion portion to transmit electrical stimulation to body organs, a second electrode on the interface portion to receive electrical stimulation applied from outside, and a signal line configured to interconnect the first electrode and the second electrode and transmit the electrical stimulation received by the second electrode to the first electrode; and a lead case configured to surround the lead, wherein a key hole penetrating from an inside to an outer surface is formed in a longitudinal direction at a position of the first electrode in the electrode wire, a slot extending in the longitudinal direction is formed at the position of the first electrode in the lead case, a conductive plate configured to apply electrical stimulation to body organs and a support plate configured to provide electrical stimulation from the first electrode to the conductive plate by contacting the first electrode are provided, wherein the conductive plate and the support plate are provided on an outer surface and an inner surface of the lead case, respectively, and are coupled to each other with the slot therebetween to form a pair, and a plurality of pairs of a conductive plate and a support plate are provided and arranged to be movable along the slot.
2 . The lead structure of claim 1 , wherein the conductive plate and the support plate are coupled by an elastic connecting member passing through the slot and movably arranged in the lead case.
3 . The lead structure of claim 2 , wherein the support plate is formed with a through hole into which a tip of a plate key for moving the support plate is inserted.
4 . A lead system implanted in a body to apply electrical stimulation to body organs, the lead system comprising: a main processor connected to an external device for communication and control; one or more lead structures according to claim 1 ; an electrode clamp for electrical connection with the lead; and a controller for controlling a position of transmitting electrical stimulation in the lead.
5 . The lead system of claim 4 , wherein the controller comprises a key capable of movement in a longitudinal direction of an electrode wire and rotational movement in a circumferential direction, and the key is inserted into a hollow of the electrode wire to move or rotate a conductive plate along the slot.

Description

FIELD OF THE INVENTION The present invention relates to a lead structure for applying electrical stimulation to body organs and a lead system using the same. BACKGROUND OF THE INVENTION Due to the complexity of modern society, modern people are easily exposed to accidents or diseases and lose their intrinsic functions or exercise abilities, but there is a limit to healing these patients with medicine alone. In order to overcome these limitations, the field of biomedical engineering, which was created by grafting the technology of the engineering field with the medical field, is developing, and as a result, major changes are occurring in many areas of a health care system. For example, pacemakers and ventricular defibrillators are saving many lives and playing an innovative role in the treatment of heart disease. In addition, using pacemaker technology, the surgeon implants a Deep Brain Stimulation (DBS) device into the patient's brain to control an abnormal brain function (e.g., see patent documents). Abnormal physical behavior or mental disorders result from abnormal functions of the brain, such as Parkinson's Disease (PD) or Obsessive-Compulsive Disorder (OCD). PD is a chronic degenerative brain disease in which the main symptoms are trembling hands and feet, slow movements, and stiff muscles, and OCD is a mental disorder in which people are reluctant to go out because of fear that they may be contaminated by things they come in contact with. Neurosurgeons are now using deep brain stimulators to treat serious health problems such as Parkinson's disease, obsessive-compulsive disorder and depression. A treatment method using a deep brain stimulator is a surgical method, and it is the only hope for treating obsessive-compulsive disorder and is evaluated as a method that has been proven effective in curing Parkinson's disease. Deep brain stimulation utilizes implantable medical devices to deliver accurate electric pulses. A deep brain stimulator is largely composed of an implantable pulse generator, an extension, and a lead. In general, when an implantable pulse generator is implanted under the chest subcutaneously, a lead is placed deep in a specific region of the brain, and the two components are connected to each other with an extension to generate stimulation through the implantable pulse generator, the stimulation is transmitted to the lead through the extension, and microelectrical stimulation may be applied to the specific region of the brain through the lead. It is important to check the position and contact point of the lead after surgery because the clinical course may differ for each patient depending on the position of the lead. Accordingly, during deep brain stimulation and lead implantation surgery, it is necessary to check an electrode stimulation position through various measurement methods such as MRI, CT image, C-arm image, and cranial nerve signal. However, if sufficient micro-electrical stimulation is not made to a correct target, it is difficult to expect a therapeutic effect. However, in the case of a conventional lead, although sizes and positions of electrode contact points are constant, each person has a different target position and size, so it is difficult to accurately match the lead to the target, but this problem is not considered in the prior art. SUMMARY OF THE INVENTION The present invention provides a lead and a lead system capable of adjusting a contact point and a position of an electrode from the outside. The present invention also provides a lead structure capable of adjusting a size or position of an electrode contact point after inserting a lead into the body, and a lead system using the same. As an embodiment of the present disclosure, a lead structure configured to apply electrical stimulation to body organs may be provided. The lead structure according to an embodiment of the present disclosure may include: a lead comprising an electrode wire having one end provided as an insertion portion to be inserted into a body and the other end provided as an interface portion for connection with an external device, a first electrode in the insertion portion to transmit electrical stimulation to body organs, a second electrode on the interface portion to receive electrical stimulation applied from outside, and a signal line configured to interconnect the first electrode and the second electrode and transmit the electrical stimulation received by the second electrode to the first electrode; and a lead case configured to surround the lead, wherein a key hole penetrating from an inside to an outer surface is formed in a longitudinal direction at a position of the first electrode in the electrode wire, a slot extending in the longitudinal direction is formed at the position of the first electrode in the lead case, and a conductive plate configured to apply electrical stimulation to body organs and a support plate configured to provide electrical stimulation from the first electrode