Patents by Inventor Xiaofen Yuan

Xiaofen Yuan 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).

  • Publication number: 20240110929
    Abstract: The present invention provides a screening kit and a confirmed and typing diagnosis system for primary aldosteronism. A sample is pretreated by a magnetic bead bonded with a balanced hydrophilic-lipophilic polymer on the surface thereof, and process conditions are optimized and the content of each the six markers such as, aldosterone in the sample is accurately detected by liquid chromatography-tandem mass spectrometry for one time, thus finding the optimal screening cut-off value of 20.4; when a positive result is judged, PA is confirmed and subjected to typing diagnosis according to the test values of the markers, thereby achieving the simultaneous detection of the content of each the six markers such as, aldosterone on the same platform. Therefore, the present invention is integrated with screening, confirmed and typing diagnosis functions, thus providing a reliable laboratory examination basis for clinicians to formulate an effective therapeutic regimen.
    Type: Application
    Filed: December 1, 2023
    Publication date: April 4, 2024
    Inventors: Pengyun LIU, Xiaofen YUAN, Jinfei MA, Ziqing KONG, Yikun LI, Weijia WU, Huafen LIU
  • Publication number: 20240019449
    Abstract: In a screening kit and a confirmed and typing diagnosis system for primary aldosteronism, a sample is pretreated by a magnetic bead bonded with a balanced hydrophilic-lipophilic polymer on the surface thereof, and process conditions are optimized and the content of each the five markers such as, aldosterone in the sample is accurately detected by liquid chromatography-tandem mass spectrometry for one time, thus finding the optimal screening cut-off value of 20.4; when a positive result is judged, PA is confirmed and subjected to typing diagnosis according to the test values of the markers, thereby achieving the simultaneous detection of the content of each the five markers such as, aldosterone on the same platform. Therefore, the screening kit and confirmed and typing diagnosis system for primary aldosteronism are integrated with screening, confirmed and typing diagnosis functions, thus providing a reliable laboratory examination basis for clinicians to formulate an effective therapeutic regimen.
    Type: Application
    Filed: April 21, 2023
    Publication date: January 18, 2024
    Inventors: Pengyun LIU, Xiaofen YUAN, Jinfei MA, Ziqing KONG, Yikun LI, Weijia WU, Huafen LIU
  • Patent number: 11860171
    Abstract: In a screening kit and a confirmed and typing diagnosis system for primary aldosteronism, a sample is pretreated by a magnetic bead bonded with a balanced hydrophilic-lipophilic polymer on the surface thereof, and process conditions are optimized and the content of each the five markers such as, aldosterone in the sample is accurately detected by liquid chromatography-tandem mass spectrometry for one time, thus finding the optimal screening cut-off value of 20.4; when a positive result is judged, PA is confirmed and subjected to typing diagnosis according to the test values of the markers, thereby achieving the simultaneous detection of the content of each the five markers such as, aldosterone on the same platform. Therefore, the screening kit and confirmed and typing diagnosis system for primary aldosteronism are integrated with screening, confirmed and typing diagnosis functions, thus providing a reliable laboratory examination basis for clinicians to formulate an effective therapeutic regimen.
    Type: Grant
    Filed: April 21, 2023
    Date of Patent: January 2, 2024
    Assignee: HANGZHOU CALIBRA DIAGNOSTICS CO., LTD.
    Inventors: Pengyun Liu, Xiaofen Yuan, Jinfei Ma, Ziqing Kong, Yikun Li, Weijia Wu, Huafen Liu
  • Publication number: 20230110552
    Abstract: Provided is a model for evaluating the degree of liver fibrosis constructed based on bile acids. A plurality of bile acids are simultaneously detected by a liquid chromatography-tandem mass spectrometer to further improve the accuracy in combination with other liver indicators; moreover, a multiple regression analysis method is applied to establish a grading diagnosis model for the degree of liver fibrosis caused by a chronic liver disease, which can significantly improve the sensitivity and specificity of the existing non-invasive diagnosis of liver fibrosis. When the model is used to evaluate the degree of liver fibrosis of a patient, the highest AUC is up to 0.9278; the sensitivity is up to 86.79%; and the specificity is up to 89.01%. The detection results are completely consistent with the pathological results of clinical liver biopsy. Therefore, patients need not receive a liver biopsy.
    Type: Application
    Filed: January 28, 2022
    Publication date: April 13, 2023
    Inventors: Haijun HUANG, Xiaofen YUAN, Rongchang CHEN, Shanshan CHEN, Zhouyang KANG
  • Publication number: 20220390472
    Abstract: The present invention provides a synchronous detection method of medicaments influencing ARR in the detecting process of renin activity by liquid chromatography-tandem mass spectrometry. The method achieves the qualitative screening of medicaments influencing ARR values while detecting plasma renin activity by liquid chromatography-tandem mass spectrometry; moreover, the method can be used to assist to analyze and judge ARR as negative, positive, false negative or false positive. The detecting method achieves effective extraction of angiotensin I and 43 hypertension therapeutics synchronously through protein precipitation to samples, and enables to perform synchronous detection of a plurality of indices including angiotensin I and 43 hypertension therapeutics on the extracted sample by liquid chromatography-tandem mass spectrometry technology of high throughput, high specificity and high sensitivity.
    Type: Application
    Filed: October 5, 2021
    Publication date: December 8, 2022
    Inventors: Pengyun LIU, Ziqing KONG, Jinfei MA, Xiaofen YUAN, Huafen LIU
  • Patent number: 8944510
    Abstract: A folding chair is disclosed including a folding chair frame, support material, and a pillow that can move between raised and lowered positions relative to the folding chair frame.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: February 3, 2015
    Assignee: Westfield Outdoor, Inc.
    Inventor: Xiaofen Yuan
  • Publication number: 20130229044
    Abstract: A folding chair is disclosed including a folding chair frame, support material, and a pillow that can move between raised and lowered positions relative to the folding chair frame.
    Type: Application
    Filed: April 16, 2013
    Publication date: September 5, 2013
    Applicant: WESTFIELD OUTDOOR, INC.
    Inventor: Xiaofen Yuan
  • Patent number: 8419134
    Abstract: A folding chair is disclosed including a folding chair frame, support material, and a pillow that can move between raised and lowered positions relative to the folding chair frame.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: April 16, 2013
    Assignee: Westfield Outdoor, Inc.
    Inventor: Xiaofen Yuan