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公开(公告)号：US11259721B2
公开(公告)日：2022-03-01
申请号：US16439011
申请日：2019-06-12
发明人： Xun Zhang , Guangfei Li
IPC分类号： A61B5/1455
摘要： Disclosed are a method and device for detecting the concentration of total hemoglobin in blood. A differential path factor corresponding to a subject is determined according to a physiological parameter of the subject and a predetermined table of a corresponding relation between the physiological parameter and the differential path factor.
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公开(公告)号：US20210244337A1
公开(公告)日：2021-08-12
申请号：US17049644
申请日：2020-04-28
发明人： Siyang Liang , Xun Zhang , Hui Du
IPC分类号： A61B5/332 , A61B5/00 , A61B5/024 , A61B5/0245
摘要： An electrocardiograph acquisition circuit, device, method and system are provided. The electrocardiograph acquisition circuit includes: a wireless transmission circuit configured to receive a first electrocardiographic voltage from a second electrocardiograph acquisition device; an electrocardiograph electrode configured to detect an electrical signal on biological skin; an acquisition circuit configured to obtain a second electrocardiographic voltage by acquiring the electrical signal detected by the electrocardiograph electrode; and a control circuit configured to obtain an electrocardiograph index signal by processing the first electrocardiographic voltage received by the wireless transmission circuit and the second electrocardiographic voltage acquired by the acquisition circuit based on a first acquisition time of the first electrocardiographic voltage and a second acquisition time of the second electrocardiographic voltage.
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公开(公告)号：US11109794B2
公开(公告)日：2021-09-07
申请号：US16414523
申请日：2019-05-16
发明人： Guangfei Li , Qi Yang , Xun Zhang
摘要： A method for processing ECG signals includes: removing peak position information of any R wave of a plurality of R waves in a plurality of ECG signals if it is determined that a first RR interval is less than or equal to a first RR interval threshold, and an amplitude of the R wave is less than or equal to a first R wave amplitude threshold; and detecting at least one new R wave in a first RR interval if it is determined that the first RR interval is greater than or equal to a second RR interval threshold; obtaining peak position information of the at least one new R wave, and then storing peak position information of any new R wave if it is determined that an amplitude of the new R wave is greater than or equal to a second R wave amplitude threshold.
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公开(公告)号：US11375906B2
公开(公告)日：2022-07-05
申请号：US16768367
申请日：2019-12-25
发明人： Xun Zhang , Yang Han , Guangfei Li , Hui Du , Siyang Liang
IPC分类号： A61B5/0205 , A61B5/1464 , A61B5/024 , A61B5/1455 , A61B5/00
摘要： A method for detecting fetal blood oxygen saturation, including: using at least two detection light of different wavelengths, to irradiate a fetus in an examined pregnant woman's abdomen in a time-sharing manner and acquiring first photoplethysmography signals corresponding to the abdomen under irradiation of the respective wavelengths of detection light, and to irradiate a detection site except the examined pregnant woman's abdomen in a time-sharing manner and acquiring second photoplethysmography signals corresponding to the detection site under irradiation of the respective wavelengths of the detection light; determining a target photoplethysmography signal of the fetus that corresponds to the detection light of each wavelength, according to the first photoplethysmography signals and the second photoplethysmography signals that correspond to the detection light of each wavelength; and determining the fetal blood oxygen saturation, according to respective target photoplethysmography signals determined.
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公开(公告)号：US20210204820A1
公开(公告)日：2021-07-08
申请号：US16768367
申请日：2019-12-25
发明人： Xun Zhang , Yang Han , Guangfei Li , Hui Du , Siyang Liang
IPC分类号： A61B5/0205 , A61B5/1464 , A61B5/024
摘要： A method for detecting fetal blood oxygen saturation, including: using at least two detection light of different wavelengths, to irradiate a fetus in an examined pregnant woman's abdomen in a time-sharing manner and acquiring first photoplethysmography signals corresponding to the abdomen under irradiation of the respective wavelengths of detection light, and to irradiate a detection site except the examined pregnant woman's abdomen in a time-sharing manner and acquiring second photoplethysmography signals corresponding to the detection site under irradiation of the respective wavelengths of the detection light; determining a target photoplethysmography signal of the fetus that corresponds to the detection light of each wavelength, according to the first photoplethysmography signals and the second photoplethysmography signals that correspond to the detection light of each wavelength; and determining the fetal blood oxygen saturation, according to respective target photoplethysmography signals determined.
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