JP2949783B

• Main Authors: YANAGAWA YUTAKA, KUBOTA TETSUMARU, KAWASHIMA MASAHIRO, KANBARA KOJI, TSUKATANI TAKASHI, HAYASHI MASAAKI, MURATA AKIRA, KAMI KUNIAKI, SHIMIZU YOSHIHITO
• Format: Patent
• Language: English
• Published: 20.09.1999
• Edition: 6
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

PURPOSE:To enable safe treatment with an accurate checking of an object to be treated by a method wherein a treating operation by a treating means is permitted when an object to be treated is judged by an ultrasonic observation means and in other cases, the treating operation by the treating means is stopped. CONSTITUTION:Inside of a blood vessel 3 is observed with an endoscope, the tip of a probe body 2 is turned to a thrombus part 21 and an ultrasonic wave is emitted from an ultrasonic vibrator 5 to receive the reflected wave therefrom with the vibrator 5. A boundary judging circuit 15 discriminates the thrombus part 21 from an ordinary blood vessel wall part 22 by a difference in reflection factor between ultrasonic waves from the thrombus part 21 and the ordinary blood vessel wall 22 to identify the boundary therebetween. When the reflected wave is determined to be reflected from the thrombus part 21, by the operation of a manipulation switch 20, a control circuit 16 switches a gate circuit 19 to make a laser oscillator 17 ready for oscillation. When the tip of the probe body 2 is turned to the blood vessel part 2, the boundary judging circuit 15 judges this state by the reflection factor therefrom to operate the gate circuit 19 accordingly. Thus, even by the operation of the manipulation switch 20, a drive circuit 18 will not be activated and the laser oscillator 17 is not ready to oscillate.