Grant-in-Aid for Scientific Research (B)
|Allocation Type||Single-year Grants |
Biomedical engineering/Biological material science
|Research Institution||KYOTO PREFECTURAL UNIVERSITY OF MEDICINE |
MORI Satoru KYOTO PREF. U. OF MED.NEUROLOGY ASSISTANT, 医学部, 講師 (40200365)
TOGAWA Tatsuo TOKYO MED.AND DENT.U. BIOSYSTEMS PROFESSOR, 医用器材研究所, 教授 (40013859)
TSUJI Takayuki NATIONAL CARDIOVASCULAR C.SURGICAL RESERCH CHIEF, 部長 (00075764)
NAKAJIMA Kenji 京都府立医科大学, 医学部, 教授 (00237265)
MAKIKAWA Masaaki RITSUMEIKAN U. ROBOTICS PROFESSOR, 理工学部, 教授 (70157163)
SAITO Kohichi TOKYO MET.AND DENT.U. BIOSYSTEMS ASSISTANT, 医用器材研究所, 助手 (00205668)
|Project Period (FY)
1998 – 1999
Completed (Fiscal Year 1999)
|Budget Amount *help
¥10,900,000 (Direct Cost: ¥10,900,000)
Fiscal Year 1999: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1998: ¥7,000,000 (Direct Cost: ¥7,000,000)
|Keywords||inconti-nence / semiconductor odor sensor / nortable type|
We developed a stationary type ambulatory inconti-nence monitor using a tin oxide semiconductor odor sensor. This was used for monitoring the excretion of disabled elderly. In this paper, we present a trial applica-tion of a portable type ambulatory incontinence monitor.
II. MATERIALS and METHODS
The systems consists of a tin oxide semiconductor sensor, an air-pump, signal processing circuits, and a memory and display device (PC : NEC9800NX).
1) Improvement of the tin oxide semiconductor odor sensor
We used TGS2600 series D1 for the stationary type monitor, a dual sided mounting type sensor which en-abled constant charged conditions of heating circuits (AC, DC) of 5V plus-minus 0.2V. For this trial, we used TGS 2400 series M1, a one-sided mounting type sensor. The heat circuits were driven by the pulse voltage appli-cation. The sensor signals were measured at a timing of 150msec after the application of the heater voltage. The housing of the sensor was a column of 9.2mm oute
r dia-meter and 7.8mm in height. Weights is 1.1g.
2) Air pump
aphragm Pump, 2002G(ASF made by Thomas Co.) was used. Applied voltage was DC6V. The air was sampled at a rate of 350ml/min continuously.
The tip of the vinyl chloride tube was placed at the coccyx between the diaper and the cover. Air was con-tinuously sampled through the tip of the tube using an air pump for 72 hours. The sensor signals were processed by the PC and results were displayed on a CRT. We used hard copies of the results for the investigation.
The systems responded to urination and defecation. Response curve obtained at the time of urination showed spike like patterns. That obtained at the time of defeca-tion showed high plateau like patterns.
We used a method to transfer the signals direct to the PC. We plan to use a batch method by which the sensor signals will be continuously recorded on RAM and read by the PC. This method will be applicable for the portable type. The pulse driven sensor showed improved sensitivity especially to hydrogen sulfide and ethanol gases.
The sensor as well as the pump driven at low power consumption that is suitable for the portable monitor. Less