Patents by Inventor Qiaojian Huang

Qiaojian Huang 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).

  • Patent number: 9380981
    Abstract: Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a light emitting component that emits one or more wavelengths of light into an interrogation region of a patient and an acoustic detector that detects acoustic energy generated by the interrogation region of the patient in response to the emitted light. The system also includes an optical detector that detects the emitted light and provides a signal that is used as an input to remove noise from the signal generated by the acoustic detector.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 5, 2016
    Assignee: Covidien LP
    Inventors: DongYel Kang, Youzhi Li, Qiaojian Huang, William Kit Dean
  • Patent number: 9180260
    Abstract: An indicator dilution system includes a catheter configured to deliver an indicator to a patient, an injection device configured to deliver the indicator to the catheter, and a connector coupling the injection device to the catheter. The system also includes one or more sensors configured to acquire measurements from components of the system, which may be used to determine the start and end time of the injection of the indicator to the patient. For example, the one or more sensors may be configured to acquire signals relating to a state of the connector, which may be used to determine whether the connector is in an open state to enable flow of the indicator or in a closed state to reduce flow of the indicator.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: November 10, 2015
    Assignee: Covidien LP
    Inventors: Qiaojian Huang, Youzhi Li, Sarah Hayman, Keith Manning
  • Publication number: 20150265154
    Abstract: Various methods and systems for the use of multi-element photoacoustic sensors within medical devices configured for photoacoustic spectroscopy techniques are provided. The photoacoustic sensor includes two or more acoustic detectors spatially configured to increase the probability of a clinician properly placing at least one of the acoustic detectors on the measurement site over the blood vessels of interest. Further, the photoacoustic sensor includes a light delivery system configured to provide multiple light sources to the measurement site, such that each acoustic detector has an adequate light supply within close proximity. The present techniques additionally provide methods for processing each acoustic signal measured at the two or more acoustic detectors to calculate one or more physiological parameters of interest, such as cardiac output.
    Type: Application
    Filed: February 26, 2015
    Publication date: September 24, 2015
    Inventors: Qiaojian Huang, Youzhi Li, Charles Keith Haisley, Sarah Lynne Hayman, Friso Schlottau, Darshan Iyer
  • Publication number: 20150208924
    Abstract: Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a sensor having a body and one or more light emitting components disposed in the body that emit one or more wavelengths of light. A light guide receives the one or more wavelengths of light and guides the one or more wavelengths of light into an interrogation region of a patient. A wide angle diffusing element is disposed on a tip of the light guide and has a diffusing angle of greater than or equal to 80 degrees. The wide angle diffusing element diffuses the one or more wavelengths of light when the sensor is opposed by air. One or more acoustic detectors are disposed in the body and detect acoustic energy generated by the interrogation region of the patient in response to the emitted light when the sensor is opposed by the patient.
    Type: Application
    Filed: January 27, 2014
    Publication date: July 30, 2015
    Applicant: COVIDIEN LP
    Inventors: Youzhi Li, Qiaojian Huang, Sarah L. Hayman, Charles Keith Haisley
  • Publication number: 20150065956
    Abstract: An indicator dilution system includes a catheter configured to deliver an indicator to a patient, an injection device configured to deliver the indicator to the catheter, and a connector coupling the injection device to the catheter. The system also includes one or more sensors configured to acquire measurements from components of the system, which may be used to determine the start and end time of the injection of the indicator to the patient. For example, the one or more sensors may be configured to acquire signals relating to a state of the connector, which may be used to determine whether the connector is in an open state to enable flow of the indicator or in a closed state to reduce flow of the indicator.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Applicant: Covidien LP
    Inventors: Qiaojian Huang, Youzhi Li, Sarah Hayman, Keith Manning
  • Publication number: 20150051473
    Abstract: A photoacoustic sensor system includes a photoacoustic sensor assembly having a light emitting component configured to emit one or more wavelengths of light into a region of a patient's tissue and an acoustic detector configured to detect acoustic energy generated within the region of the patient's tissue in response to the emitted light. The photoacoustic sensor assembly is configured to generate a signal that enables a monitor to determine a potion of the sensor assembly relative to the patient's tissue.
    Type: Application
    Filed: August 15, 2013
    Publication date: February 19, 2015
    Applicant: Covidien LP
    Inventors: Qiaojian Huang, Charles Haisley, Sarah Hayman, Youzhi Li, Friso Schlottau
  • Publication number: 20140275941
    Abstract: Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a light emitting component that emits one or more wavelengths of light into an interrogation region of a patient and an acoustic detector that detects acoustic energy generated by the interrogation region of the patient in response to the emitted light. The system also includes an optical detector that detects the emitted light and provides a signal that is used as an input to remove noise from the signal generated by the acoustic detector.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: COVIDIEN LP
    Inventors: DongYel Kang, Youzhi Li, Qiaojian Huang, William Kit Dean
  • Publication number: 20140275943
    Abstract: Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a light emitting component that emits one or more wavelengths of light into an interrogation region of a patient and an acoustic detector that detects acoustic energy generated by the interrogation region of the patient in response to the emitted light. The system may be implemented to receive photoacoustic waves from a local vein and artery and determine hemodynamic parameters based on a summed indicator dilution curve representative of both arterial and venous indicator dilution.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: COVIDIEN LP
    Inventors: DongYel Kang, Bo Chen, Qiaojian Huang, Youzhi Li
  • Publication number: 20140275826
    Abstract: Various methods and systems for photoacoustic patient monitoring are provided. A photoacoustic system includes a light emitting component that emits one or more wavelengths of light into an interrogation region of a patient and an acoustic detector that detects acoustic energy generated by the interrogation region of the patient in response to the emitted light. A reflective coating is disposed on the light emitting component, the acoustic detector, the patient, or a combination thereof to direct the emitted light toward the interrogation region of the patient.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Youzhi Li, Qiaojian Huang, Charles Keith Haisley, Sarah Lynne Hayman