US-20260123948-A1 - SHOCK WAVE LITHOTRIPSY DEVICE HAVING BREATHING TRIGGER FUNCTION

US20260123948A1US 20260123948 A1US20260123948 A1US 20260123948A1US-20260123948-A1

Abstract

A shock wave lithotripsy device includes a shock wave generation unit that irradiates shock waves to a stone in the body of a patient, a trigger information generation unit that generates trigger information at a time point in a breathing cycle when a focus, which is set within a movement path of the stone according to breathing, matches the stone, and a control unit that controls, on the basis of the trigger information, whether or not to irradiate the shock waves from the shock wave generation unit. The shock waves can be irradiated in response to changes in the position of the stone in the body caused by breathing.

Inventors

Sung Yong Cho
Jae Hak Jeong
Sung Joung JEON

Assignees

SEOUL NATIONAL UNIVERSITY HOSPITAL
HNT MEDICAL CO. LTD.

Dates

Publication Date: 20260507
Application Date: 20221227
Priority Date: 20221004

Claims (7)

1 . A shock wave lithotripsy device comprising: a shock wave generation unit configured to emit shock waves to stones in the body of a patient; a trigger information generation unit configured to generate trigger information at a time point in a breathing cycle where a focus set within the stone's movement path according to breathing matches the stone; and a control unit configured to control whether or not to emit shock waves from the shock wave generation unit based on the trigger information.
2 . The shock wave lithotripsy device according to claim 1 , further comprising a breathing sensor unit configured to measure a respiratory volume over time to obtain the breathing cycle.
3 . The shock wave lithotripsy device according to claim 1 , further comprising an imaging unit configured to check a degree of movement of the stone due to breathing.
4 . The shock wave lithotripsy device according to claim 1 , wherein the trigger information generation unit sets a reference point in the breathing cycle and generates trigger information when the breathing reaches the reference point.
5 . The shock wave lithotripsy device according to claim 1 , wherein the control unit operates the shock wave generation unit when it is determined that the trigger information matches the focus and the stone.
6 . The shock wave lithotripsy device according to claim 1 , wherein the control unit includes: an input unit configured to generate an input signal; a storage unit configured to store the trigger information when the input signal is transmitted while the trigger information is being generated by the trigger information generation unit; and a controller unit configured to generate shock waves by driving the shock wave generation unit based on the trigger information stored in the storage unit.
7 . The shock wave lithotripsy device according to claim 1 , wherein the control unit stops the operation of the shock wave generation unit when the breathing cycle of the patient deviates from the average breathing cycle.

Description

BACKGROUND 1. Technical Field The present invention relates to a shock wave lithotripsy device incorporating a breathing trigger function. 2. Background of Invention Extracorporeal shock wave lithotripsy is a treatment that crushes stones in a human body by focusing shock waves generated outside the human body on a site where the stones are present within the body. The position of most stones in the body may be confirmed using an X-RAY device or an ultrasound device of a shock wave lithotriptor. When using an ultrasound device, it is possible to continuously observe the location of stones in the body, but when using the X-RAY device, continuous observation of stones is difficult due to an amount of radiation exposure. On the other hand, even if it is possible to continuously check the location of the stone using the ultrasound device, a patient breathes continuously and the location of the stone may slightly change depending on the patient's breathing. A minimal change in the position of the stone may cause a problem in that the shock waves are not accurately radiated onto the stone. Due to the above problem, when shock waves are irradiated onto a site where no stone exists, large or small damage may occur in body tissue. SUMMARY An object of the present invention is to provide a shock wave lithotripsy device incorporating a breathing trigger function that can irradiate shock waves in response to changes in the position of stones in the body of a patient caused by breathing. 1. A shock wave lithotripsy device, including: a shock wave generation unit configured to emit shock waves to stones in the body of a patient; a trigger information generation unit configured to generate trigger information at a time point in a breathing cycle where a focus set within the stone's movement path according to breathing matches the stone; anda control unit configured to control whether or not to emit shock waves from the shock wave generation unit based on the trigger information. 2. The shock wave lithotripsy device of the above 1, further including a breathing sensor unit configured to measure a respiratory volume over time to obtain the breathing cycle.3. The shock wave lithotripsy device of the above 1, further including an imaging unit configured to check a degree of movement of the stone due to breathing.4. The shock wave lithotripsy device of the above 1, wherein the trigger information generation unit sets a reference point in the breathing cycle and generates trigger information when the breathing reaches the reference point.5. The shock wave lithotripsy device of the above 1, wherein the control unit operates the shock wave generation unit when it is determined that the trigger information matches the focus and the stone.6. The shock wave lithotripsy device of the above 1, wherein the control unit includes: an input unit configured to generate an input signal; a storage unit configured to store the trigger information when the input signal is transmitted while the trigger information is being generated by the trigger information generation unit; and a controller unit configured to generate shock waves by driving the shock wave generation unit based on the trigger information stored in the storage unit.7. The shock wave lithotripsy device of the above 1, wherein the control unit stops the operation of the shock wave generation unit when the breathing cycle of the patient deviates from the average breathing cycle. The shock wave lithotripsy device of the present invention can emit and direct shock waves in response to changes in the position of stones in the body of a patient caused by breathing. According to this, shock waves may irradiate the exact location of the stone, effectively preventing shock waves from being radiated to other sites where no stone exists. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a stone crushing method, that is, a lithotripsy method using a shock lithotripsy device according to an embodiment of the present invention. FIG. 2 is a breathing cycle graph obtained according to an embodiment of the present invention. FIG. 3 is an X-ray image of the patient in maximum exhalation and inhalation states obtained according to an embodiment of the present invention. FIGS. 4 and 5 show the focus when the focus (trigger point) and the breathing cycle (the movement path of the stone according to the breathing cycle) match and do not match in the X-ray images and ultrasound images, respectively. DETAILED DESCRIPTION Hereinafter, the present invention will be described in detail. The present invention provides a shock wave lithotripsy device. The shock wave lithotripsy device of the present invention may include a shock wave generation unit, a trigger information generation unit and a control unit. The shock wave generation unit emits and directs shock waves to stones in the patient's body and is electrically connected to the control unit. The shock wave generation un