7 results about "Breath test" patented technology

The application discloses a Helicobacter pylori breath test signal denoising fitting method and system, and belongs to the technical field of medical detection and signal processing. The method processes the continuous monitoring signal of the 13CO2 / 12CO2 isotope ratio in exhalation: firstly, the original signal is subjected to band-pass digital filtering to suppress high-frequency noise; then, low-frequency drift is eliminated through adaptive baseline correction to generate a drift-removed signal; subsequently, a robust peak value recognition algorithm is used to extract physiological response characteristics; finally, the identified peak value is taken as the center, a nonlinear function with physiological constraints is used for local fitting, and the Delta Over Baseline value is calculated based on the generated fitting curve with high precision. The application effectively solves the signal distortion problem caused by breathing fluctuations, instrument noise and the like in in vivo detection, realizes high-fidelity restoration of the Helicobacter pylori metabolic response, and significantly improves the detection accuracy and reliability of the breath test.

The invention relates to the technical field of expiration detection, in particular to an expiration detection method and device based on passage division of four metal oxide gas sensors. According to the method, four metal oxide gas sensor channels are adopted, and a metabolic energy and substrate switching channel, an inflammation and oxidative stress channel, a volatile organic compound exposure and abnormal metabolic mode channel and a quality control and stability channel are respectively fixed and correspond to the metabolic energy and substrate switching channel, the inflammation and oxidative stress channel, the volatile organic compound exposure and abnormal metabolic mode channel and the quality control and stability channel; an expiration signal of the same mouth is mapped to response axes of the four channels, and the system outputs the relative state of each channel instead of a disease diagnosis conclusion; and the quality control and stability passage is used for judging the qualification of the expiration sample and whether a detection result is allowed to be output or not. By adopting the method and the corresponding device, the sensors and the physiological risk pathways can be in one-to-one correspondence, binding of a single sensor or a single substance to a specific disease is avoided, improvement of interpretability, expansibility and compliance is facilitated, and the method and the corresponding device are suitable for expiration risk environment assessment and health screening equipment.

The utility model discloses a carbon 13 expiration test air collecting bag which comprises a bag body and an air blowing pipe, one end of the air blowing pipe is communicated with the inside of the bag body, and the other end of the air blowing pipe is provided with a cover cap. An exhaust pipe is further arranged on the bag body, one end of the exhaust pipe is communicated with the interior of the bag body, the other end of the exhaust pipe is communicated with the atmosphere, a one-way exhaust assembly is arranged in the exhaust pipe, and when the air pressure in the bag body is larger than a threshold value, the one-way exhaust assembly is converted into an open state from a closed state to form exhaust of the bag body. The exhaust pipe is arranged on the bag body of the air collection bag for the carbon 13 expiration test, the one-way exhaust assembly is in a normally-closed state, when the air pressure in the bag body is larger than a threshold value, the one-way exhaust assembly is opened to form one-way exhaust of the bag body, and the situation that the air pressure in the bag body is too large, and smooth proceeding of the test is affected is avoided.

The application relates to a portable breath detection device, method and electronic equipment, wherein the device comprises: a collection part for collecting gas exhaled by a user; a flow guide part connected with the collection part, which switches a corresponding gas channel based on the working mode of the portable breath detection device to control the flow mode of the gas or air introduced from the external environment based on the gas channel; a driving part for driving the gas or air based on the working mode, so that the gas or air flows along the gas channel based on the flow mode until the gas or air is discharged into the external environment; and a detection part for analyzing the gas flowing through the gas channel to obtain an analysis value between the gas and a preset sample gas. Thus, the technical problem that, in the related art, the structure under different working modes is separately designed, is large in size, is difficult to realize portable application, lacks an accurate airflow control structure, and affects the detection result is solved.

A fluorescent sensor compound for detecting marijuana can include an oligomer having a general structure of Y-[D]n-A-Z. In this structure, D is an electron donor group according to Formula (I), and A is an electron acceptor group according to Formula. (II). Additionally, Y is R3, R3-A, or R3-D-A; Z is R3 or [D]m-R3; n is an integer from 1 to 3; m is an integer from 1 to 2; R1 is an alkyl chain and R1 can optionally include different alkyl chains in different respective D groups; R3 is an alkoxyphenyl end group. A fluorescent sensor for detecting marijuana (100) can include the fluorescent sensor compound formed as a. film (110) and a. fluorescence detector (150) oriented to detect a fluorescence response from the fluorescent sensor compound.

A breath analysis system comprises a breath analysis device having an analyte sensor, such as a metal oxide semiconductor sensor, that needs to be heated or otherwise prepared before a breath test can be performed. To reduce or avoid a user-perceived delay (typically multiple minutes) associated with the sensor preparation operation, the system predictively initiates a sensor preparation operation based on a determination or prediction of whether the user is in an adequate state for performing a breath test. This prediction may be based on one or more factors, such as the current time, whether the breath analysis device is within wireless communication (e.g., Bluetooth) range of the user's smartphone, data reflective of the user's location and / or activity, etc.