8 results about "Pulse oximetry" patented technology

The utility model discloses belong to the blood oxygen saturation sensor technical field, concretely is an improved pulse blood oxygen saturation sensor, including saturation sensor body, the saturation sensor body includes two transmitting light sources and photoelectric detector, the saturation sensor body bottom is set with first annular groove and second annular groove, the first annular groove is installed with rubber ring, the second annular groove is installed with heating ring, through the magic tape, through -hole and rubber ring that set up on the fixing band, can improve the stability of saturation sensor wearing, and improve the comfort degree when wearing, and the user can adjust the tightness of wearing according to own condition through the magic tape that set up on the fixing band, will not cause the saturation sensor wearing too tight or too loose, through the through -hole can with the skin of user's medical adhesive tape is bonded, further improve the stability of saturation sensor wearing, to guarantee the accuracy of data when detecting.

This invention relates to the field of sleep monitoring data fusion processing technology, and discloses a sleep monitoring method based on the fusion of non-invasive brain oxygen saturation (AHI) and multiple physiological parameters. The method includes: S1, simultaneously acquiring multiple physiological parameter signals during the subject's sleep; S2, extracting and analyzing the AHI signal to generate multiple characterization markers; S3, identifying respiratory events related to the subject's apnea information from the respiratory signal and pulse oximetry signal, calculating the apnea-hypopnea index (AHI); and performing correlation analysis on the identified respiratory events and multiple characterization markers to calculate a correlation coefficient; S4, obtaining a comprehensive sleep monitoring assessment report based on the correlation coefficient and the AHI to determine the severity of the subject's current respiratory disturbance and the risk of brain tissue hypoxia. By improving the effectiveness of AHI in non-invasive brain oxygen saturation monitoring, the confirmatory nature of non-invasive brain oxygen saturation information in the respiratory correlation diagnosis during sleep monitoring is ensured.

The utility model provides a kind of monitor capable of displaying pulse breath ratio parameter, including monitor body, still including respiratory data acquisition unit and pulse measurement unit, both are connected with control unit, control unit is connected with display unit in monitor body;Respiratory data acquisition unit is configured to collect the respiratory data of patient, and it is transmitted to control unit after being converted into digital signal, control unit can obtain the respiratory frequency of patient per minute;Pulse measurement unit is configured to be able to collect the pressure signal of patient when measuring pulse, and it is transmitted to control unit after being converted into digital signal, control unit can obtain the pulse number of patient per minute according to pressure signal;Control unit divides the ratio of pulse number per minute by respiratory frequency per minute and transmits to display unit to show, the ratio of pulse number per minute by respiratory frequency per minute is pulse breath ratio parameter. The above-mentioned monitor can display pulse breath ratio parameter on monitor display interface.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations - which utilize the relative tissue absorbance of red and infrared light to estimate SpO2 - to account for the concentration of melanin by additionally measuring the skin absorbance of UV~A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

The present invention is an in vivo non-invasive method and apparatus for the measurement of the arterial blood oxygen saturation status of a patient, the method is a generalized improvement on conventional pulse oximetry to correct for its skin pigmentation bias and significant errors in oxygen saturation assessment in the presence of methemoglobin. The method requires an additional red light sensor with an infrared long pass filter to conventional pulse oximetry, and utilizes red and infrared light and sensors to non-invasively measure the peripheral pulse optical plethysmograph waveforms (PPG) at three light wavelengths, red, long pass red and infrared, positioned over a finger, or ear or other extremity, and from the pulse oximetric ratio of ratios transforms the PPG measurements by a processing device that determines the subject's arterial blood oxygen saturation directly, without the need for an empirical correction as is required in conventional pulse oximetry. The method determines the red transmitted light waveform and thus quantifies the wavelength shift from the incident red light due to the subject's skin pigmentation, and from in vivo hemoglobin extinction coefficients, determines the relative concentrations of oxygenated and deoxygenated hemoglobin and methemoglobin in the subject's arterial blood.

The present disclosure relates to a pulse oximetry method in which the contribution of venous capillaries to photoplethysmogram is reduced below 25%.

This utility model discloses a pulse oximetry sensor, specifically an adjustable disposable pulse oximetry sensor. It includes a sensor body with a connecting wire and a plug. The sensor body has a movable slot containing an adjustment component. The adjustment component includes a moving block with positioning wings on both sides and a storage slot on top. A push-pull rod is rotatably connected to the storage slot. A positioning strip is located on one side of the moving block, and a PD chip is installed at the bottom. The PD chip's position can be flexibly adjusted via the movable block within the movable slot. When adjustment is needed, pushing or pulling the push-pull rod moves the moving block within the movable slot, allowing the PD chip to be adjusted to the desired position. This significantly improves practicality compared to existing technologies.

Techniques and apparatuses are described for determining an estimated cardiac output of a patient during a dialysis treatment. In one embodiment, for example, an apparatus can include a memory and logic coupled with the memory. The logic can be configured to determine an upper body oxygen consumption of the patient, determine, during the dialysis process, a hemoglobin concentration and a venous oxygen saturation, as measured via an optical blood monitor operably coupled to an extracorporeal circuit of a dialysis system performing the dialysis process, an arterial oxygen saturation as measured via a pulse oximeter operably coupled to the patient, an arterial-venous oxygen content difference based on the arterial oxygen saturation and the venous oxygen saturation, and an upper body blood flow (UBBF) as (the upper body oxygen consumption) / (the arterial-venous oxygen content difference), and determine a treatment recommendation based on the upper body blood flow. Other embodiments are also described.