1987 Volume 6 Issue 2 Pages 43-50
Sampling capsules were developed. At the desired site in a digestive tract, the contents can be collected by the capsules. A resonance circuit composed of the Ni-Ti coil and tip condenser was installed in a capsule, and the capsule was operated by high frequency wave irradiation, 2.7 MHz, from outside of the body. The capsule couldbe successfully operated in water irradiated 6 cm apart from the capsule. By the aid of the specific suction valves, a sample of more than 100μl can be collected, and the valve is helpful to prevent backflow. For practical purposes, the price and size of the high frequency induction heating apparatus should be examined further.
