Browsing by Author "Hamada, Shingo"
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- ItemA mobile phone-based ECG monitoring system.(2006-07-04) Iwamoto, Junichi; Yonezawa, Yoshiharu; Maki, Hiromichi; Ogawa, Hidekuni; Ninomiya, Ishio; Sada, Kouji; Hamada, Shingo; Hahn, Allen W; Caldwell, W MortonWe have developed a telemedicine system for monitoring a patient s electrocardiogram during daily activities The recording system consists of three ECG chest electrodes a variable gain instrumentation amplifier a low power 8 bit single chip microcomputer a 256 KB EEPROM and a 2 4 GHz low transmitting power mobile phone PHS The complete system is mounted on a single lightweight chest electrode array When a heart discomfort is felt the patient pushes the data transmission switch on the recording system The system sends the recorded ECG waveforms of the two prior minutes and ECG waveforms of the two minutes after the switch is pressed directly in the hospital server computer via the PHS The server computer sends the data to the physician on call The data is displayed on the doctor s Java mobile phone LCD Liquid Crystal Display so he or she can monitor the ECG regardless of their location The developed ECG monitoring system is not only applicable to at home patients but should also be useful for monitoring hospital patients
- ItemA new intelligent bed care system for hospital and home patients.(2005-08-22) Yonezawa, Yoshiharu; Miyamoto, Yasuaki; Maki, Hiromichi; Ogawa, Hidekuni; Ninomiya, Ishio; Sada, Kouji; Hamada, Shingo; Caldwell, W MortonAn intelligent bed care system has been developed for monitoring patient movements and behavior in the hospital and at home in order to prevent injuries from falls a major problem in health care facilities Falls as well as patient activity immediately preceding falls i e exiting the bed are especially dangerous when infusion extubation also occurs This new system detects in bed infusion fluid leaks bleeding due to infusion tube pullout and urine resulting from incontinence It employs stainless steel tape and wire noncontacting electrodes several linear integrated circuits and a low power 8 bit single chip microcomputer The electrodes are installed between the bed mattress and sheet to record changes in an always present alternating current AC voltage which is induced on the patient s body by electrostatic coupling from a 100 V 60 Hz alternating current power line around the bed The microcomputer uses changes in the induced alternating current voltage to detect the patient s movements before and after leaving the bed as well as any fluid leakage The microcomputer alerts the nursing station via the nurse call system or personal handy phone PHS that the patient is in an active state has a dangerous posture on the bed is contaminating the sheet due to leaking bleeding or incontinence or is out of bed
- ItemA new mobile phone-based ECG monitoring system.(2007-05-09) Iwamoto, Junichi; Yonezawa, Yoshiharu; Ogawa, Hiromichi Maki Hidekuni; Ninomiya, Ishio; Sada, Kouji; Hamada, Shingo; Hahn, Allen W; Caldwell, W MortonWe have developed a system for monitoring a patient s electrocardiogram ECG and movement during daily activities The complete system is mounted on chest electrodes and continuously samples the ECG and three axis accelerations When the patient feels a heart discomfort he or she pushes the data transmission switch on the recording system and the system sends the recorded ECG waveforms and three axis accelerations of the two prior minutes and for two minutes after the switch is pressed The data goes directly to a hospital server computer via a 2 4 GHz low power mobile phone These data are stored on a server computer and downloaded to the physician s Java mobile phone The physician can display the data on the phone s liquid crystal display
- ItemA new venous infusion pathway monitoring system.(2007-11-16) Maki, Hiromichi; Yonezawa, Yoshiharu; Ogawa, Hidekuni; Ninomiya, Ishio; Sata, Koji; Hamada, Shingo; Caldwell, W MortonA new infusion catheter pathway monitoring system employing linear integrated circuits and a low power 8 bit single chip microcomputer has been developed for hospital and home use The sensor consists of coaxial three layer conductive tapes wrapped around the polyvinyl chloride infusion tube The inner tape is the main electrode which records an AC alternating current voltage induced on the patient s body by electrostatic coupling from the normal 100 volt 60 Hz AC power line wiring field in the patient s room The outside tape layer is a reference electrode to monitor the AC voltage around the main electrode The center tape layer is connected to system ground and functions as a shield The microcomputer calculates the ratio of the induced AC voltages recorded by the main and reference electrodes and if the ratio indicates a detached infusion alerts the nursing station via the nurse call system or low transmitting power mobile phone
- ItemA wearable, mobile phone-based respiration monitoring system for sleep apnea syndrome detection.(2005-04-26) Ishida, Ryoichi; Yonezawa, Yoshiharu; Maki, Hiromichi; Ogawa, Hidekuni; Ninomiya, Ishio; Sada, Kouji; Hamada, Shingo; Hahn, Allen W; Caldwell, W MortonA new wearable respiration monitoring system has been developed for non invasive detection of sleep apnea syndrome The system which is attached to a shirt consists of a piezoelectric sensor a low power 8 bit single chip microcontroller EEPROM and a 2 4 GHz low power transmitting mobile phone PHS The piezoelectric sensor whose electrical polarization voltage is produced by body movements is installed inside the shirt and closely contacts the patient s chest The low frequency components of body movements recorded by the sensor are mainly generated by respiration The microcontroller sequentially stores the movement signal to the EEPROM for 5 minutes and detects by time frequency analysis whether the patient has breathed during that time When the patient is apneic for 10 sseconds the microcontroller sends the recorded respiration waveform during and one minute before and after the apnea directly to the hospital server computer via the mobile phone The server computer then creates apnea filings automatically for every patient The system can be used at home and be self applied by patients Moreover the system does not require any extra equipment such as a personal computer PDA or Internet connection