| Project/Area Number |
14571205
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Digestive surgery
|
|---|
| Research Institution | Kyushu University |
|---|
Principal Investigator |
KONOMI Hiroyuki Kyushu University, University Hospital, Assistant professor, 大学病院, 助手 (30343320)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SHIMIZU Shyuji Kyushu University, University Hospital, Associate professor, 大学病院, 助教授 (70274454)
MIBU Ryuichi Kyushu University, School of medicine, Professor, 医学部, 教授 (20200107)
TANAKA Masao Kyushu University, Graduate School of Medical Sciences, Professor, 医学研究院, 教授 (30163570)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Project Status |
Completed (Fiscal Year 2003)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2003: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
|
|---|
| Keywords | Intestinal motiliry / wireless / intestinal manometry |
|---|
| Research Abstract |
We applied a commercially available wireless pressure pickup device comprising transducer connected to a transmitter and a battery embedded within a silicon block for a sender of intestinal manometric signal. This device was 1×1×2.4 cm in size and transforms pressure change into AM radio wave. The change of pressure was recognized as interval changes of sound from radio-receiver. It was expected that the intraluminal intestinal manometry could be recorded placing the pressure pickup device within the intestine and sending manometric signals over AM radio-wave to a radio-receiver. Sound data collected from radio-receiver was analyzed and transformed into a pressure wave. In vitro preliminary experiment showed that pressure wave could be successfully reconstructed from the sound data recorded in the system described above as far as distance between the pickup device and the receiver was within 5 cm. It is essential to restrain the pickup device at a certain point in the intestine. We fou
… More
nd that the pickup device can stay at the pig colon, 40 cm oral from the anus, at least 24 hour utilizing endoscopic clipping device.
In vivo intraluminal intestinal manometry using the wireless pickup device was examined in the pig colon. Simultaneous conventional perfusion manometric recording using a low compliance pneumo-hydrauric capillary infusion system from the same recording position was made for verification. The radiowave receiving system was placed on the abdominal wall immediately above the pickup device to minimize distance between the pickup device and the receiver.
Signals recorded from the receiver were contaminated with various noises such as from radio station. It was difficult to purify a pressure wave signal from the intestine. We tried to increase an output of the pickup device, improve a directivity of an antenna of the receiver and develop a filter to purify signals to overcome this problem by in vitro experiments. However all attempts to overcome the problems were unsuccessful so far. These problems need to be overcome in the future. Less
|
