Patents by Inventor Ngak Kwong Chua

Ngak Kwong Chua has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Noninvasive blood pressure monitoring system
    Patent number: 7871381
    Abstract: The preferred embodiment of the present invention comprises a single microprocessor-based interface that connects between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor or module. The interface effectively emulates an IBP transducer in such a way that the IBP monitor sees the interface as if it were a regular IBP transducer from a fluid-filled blood pressure monitoring line. It receives the signal from an NIBP sensor and determines the blood pressure corresponding to the signal. It accepts the excitation voltage provided by the IBP monitor. From the excitation voltage and a known transducer sensitivity which the IBP monitor is configured to work with, the interface emulates the IBP transducer output signal corresponding to the blood pressure. The interface also emulates the input and output impedances of the IBP transducer which the IBP monitor is configured to work with.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: January 18, 2011
    Assignee: Healthstats International Pte Ltd
    Inventors: Kim-Gau Ng, Wee Leng Peh, Ngak Kwong Chua
  • Noninvasive blood pressure monitoring system
    Patent number: 7144372
    Abstract: The preferred embodiment of the present invention comprises a single microprocessor-based interface that connects between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor or module. The interface effectively emulates an IBP transducer in such a way that the IBP monitor sees the interface as if it were a regular IBP transducer from a fluid-filled blood pressure monitoring line. It receives the signal from an NIBP sensor and determines the blood pressure corresponding to the signal. It accepts the excitation voltage provided by the IBP monitor. From the excitation voltage and a known transducer sensitivity which the IBP monitor is configured to work with, the interface emulates the IBP transducer output signal corresponding to the blood pressure. The interface also emulates the input and output impedances of the IBP transducer which the IBP monitor is configured to work with.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: December 5, 2006
    Assignee: Healthstats International PTE LTD
    Inventors: Kim-Gau Ng, Wee Leng Peh, Ngak Kwong Chua
  • Noninvasive blood pressure monitoring system
    Publication number: 20040147847
    Abstract: The preferred embodiment of the present invention comprises a single microprocessor-based interface that connects between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor or module. The interface effectively emulates an IBP transducer in such a way that the IBP monitor sees the interface as if it were a regular IBP transducer from a fluid-filled blood pressure monitoring line. It receives the signal from an NIBP sensor and determines the blood pressure corresponding to the signal. It accepts the excitation voltage provided by the IBP monitor. From the excitation voltage and a known transducer sensitivity which the IBP monitor is configured to work with, the interface emulates the IBP transducer output signal corresponding to the blood pressure. The interface also emulates the input and output impedances of the IBP transducer which the IBP monitor is configured to work with.
    Type: Application
    Filed: February 27, 2003
    Publication date: July 29, 2004
    Inventors: Kim-Gau Ng, Wee Leng Peh, Ngak Kwong Chua