17 results about "Cuff inflation" patented technology

Systems and methods are disclosed for blood pressure analysis. In some examples, a system receives sensor data from a sensor during a time period to monitor a blood pressure wave signal in the sensor data. The system inflates a cuff (worn by a patient) with a gas until a characteristic of the pulse wave signal crosses a characteristic threshold from a first side to a second side at a first time within the time period. The cuff is at a first pressure at the first time. The system deflates the cuff until the characteristic of the pulse wave signal crosses the characteristic threshold from the second side to the first side at a second time within the time period. The cuff is at a second pressure at the second time. The system identifies a blood pressure value corresponding to the patient as being between the first pressure and the second pressure.

The invention discloses a cuff-free blood pressure continuous monitoring method and system based on a light guide film, multiband reflected light signals of fingertip skin are collected through the light guide film attached to a terminal screen, the light guide film realizes directional light guide and stray light filtering through a micro-nano grating array, the light guide film is aligned with screen pixel hardware, and the light guide film is connected with the terminal screen. And the signal to noise is obviously improved compared with a common camera scheme. According to the method, multi-dimensional features such as time difference, rise time and enhancement index between dual-band pulse wave crests are extracted, and systolic pressure and diastolic pressure are calculated in combination with a user personalized baseline model. The system supports dual modes of active measurement and night passive monitoring, motion artifacts are eliminated through an acceleration sensor, ambient light interference is inhibited through an ambient light sensor, and one-machine multi-person exclusive monitoring, local encrypted data storage and user autonomous management are realized through linkage with an applicant spectrum identity recognition patent. The blood pressure monitoring device does not need cuff inflation, does not need electrocardio reference, is free of oppression, can realize non-perception continuous blood pressure monitoring when a user uses a mobile phone daily, and has the advantages of being non-invasive, continuous, low in cost, high in precision and safe in privacy.

The application provides a lung segment bronchus catheter, which comprises a catheter tail end ventilation and suction interface, a cuff inflation device, an outer tube, an inner tube, a front end cuff and a guide end formed by the inner tube; the cuff is annularly arranged on the outer surface of the catheter head, and is in the form of a ring ball wrapped around the inner tube in the inflated state; the cuff inflation interface and the cuff inflation conduit are communicated between the gap between the outer tube and the inner tube at the catheter tail and lead to the cuff; the catheter ventilation and suction interface is communicated with the inner tube and the guide end formed by the inner tube, and a guide wire is arranged in the catheter ventilation and suction interface to form a straight lumen. The catheter can enter the target lung segment or sub-lung segment bronchus through the operation channel of the bronchoscope, the inflated cuff seals the airway cavity around the lung segment bronchus catheter cavity, then the guide wire is pulled out from the lung segment bronchus catheter cavity, the target lung segment or sub-lung segment is inflated through the catheter ventilation and suction interface, so that the anatomical range of the target lung segment or sub-lung segment after ventilation is revealed, the technical problem that a thoracic surgeon cannot accurately identify the anatomical range of the target lung segment in the operation is effectively solved, and the thoracic surgery anatomical partial lobectomy operation is facilitated.

A tracheostomy tube includes a cannula including a wall forming a ventilation lumen, the cannula further including a curved section, a distal anterior side, a distal posterior side, and an open camera cord channel; a mounting plate; a cuff positioned distally of the curved section and extending over a portion of the camera cord channel; a cuff inflation lumen; a camera assembly positioned distally of the cuff; a front wall comprising an opaque portion and a transparent portion, the transparent portion positioned distally and in front of the camera assembly; a fluid lumen configured to supply a fluid to clean the transparent portion of the front wall; and a camera cord electrically connected to the camera assembly, the camera cord including a camera cord proximal portion positioned in the camera cord channel and a camera cord distal portion positioned distally of the cuff.

The disclosure provides a device for non-invasive blood pressure measurement comprising a blood pressure cuff positioned around a limb with an optical sensor integrated into the distal end. The optical sensor comprises a transmission optical sensor with light source and detector on opposite sides of a digit distal to the inflatable portion. A processing device controls cuff inflation and deflation while capturing successive optical plethysmographic waveforms during deflation. The processing device high-pass filters waveforms to produce filtered signals with equal area above and below baseline, multiplies corresponding points of filtered waveforms to generate product values, and sums products to determine concordance measures. The device detects initial returning pulsations by identifying when initial low-amplitude optical pulsations have same shape as larger amplitude pulsations during deflation. Systolic blood pressure is determined when concordance measures indicate shape concordance between initial and subsequent optical pulsations. The device measures blood pressure and calculates ankle-brachial indices.

The present specification describes methods and systems for on-inflate non-invasive blood pressure (NIBP) measurement suitable for cuffs of various sizes. In embodiments, an adapter hose connecting the cuff to the NIBP device is dynamically identified. Embodiments provide a restriction in at least one of the valves in the NIBP device to enable a controlled release of air from the device during the cuff inflation process.

The invention belongs to the technical field of hemostasis instruments, and provides a method for measuring blood vessel locking pressure by an orthopedic surgery hemostasis instrument, which comprises the following steps of: inflating a cuff wound on a limb until a blood vessel is completely locked, and controlling the cuff to release pressure at a constant speed, the pressure sensor and the independent pulse vibration sensor synchronously and independently collect a cuff pressure value and a pulse wave signal, the pulse wave signal is processed to obtain the trend that the amplitude of the pulse wave signal changes along with the pressure, and the amplitude is converted from a stable baseline state representing vascular atresia to the corresponding cuff pressure when the amplitude continuously rises for the first time. And the critical opening pressure of the blood vessel is accurately judged and is used as an individualized blood vessel locking pressure measurement value. The invention also discloses steps for carrying out hemostasis operation by using the method and a hemostasis instrument for realizing the method. The problem that in the prior art, measurement is not accurate due to the fact that pressure or pressure pulsation signals depend on experience is solved, and accurate measurement of the vascular locking pressure is achieved.

A controller is operable to selectively supply gas to, and evacuate gas from, regions of a hyperbaric wound treatment chamber. The controller operates to inflate a passage or rib of the device to provide that the device is made sufficiently rigid for inserting a limb therethrough, and inflate an inflatable cuff to create a seal against the limb. The controller also operates to evacuate ambient air trapped within the chamber, and optionally partially evacuate the passage or rib, after the seal is created by the inflatable cuff, and then introduce oxygen into the chamber, and optionally inflate the passage or rib. The cuff, when inflated and creating a seal against a limb, optionally is at least partially within the chamber, and the treatment gas is supplied to the chamber to maintain the seal of the cuff against the limb.

Systems and methods are disclosed for blood pressure analysis. In some examples, a system receives sensor data from a sensor during a time period to monitor a blood pressure wave signal in the sensor data. The system inflates a cuff (worn by a patient) with a gas until a characteristic of the pulse wave signal crosses a characteristic threshold from a first side to a second side at a first time within the time period. The cuff is at a first pressure at the first time. The system deflates the cuff until the characteristic of the pulse wave signal crosses the characteristic threshold from the second side to the first side at a second time within the time period. The cuff is at a second pressure at the second time. The system identifies a blood pressure value corresponding to the patient as being between the first pressure and the second pressure.

The application provides a non-invasive blood pressure waveform detection method and a blood pressure measuring device. A cuff is used to be bound on a subject's limb. An inflation device is communicated with the cuff through an air path to inflate the cuff. A deflation device is communicated with the cuff through an air path to deflate the cuff. A cuff pressure sensor is located on the communication air path between the inflation device and the deflation device and the cuff to detect the gas pressure in the cuff in real time and obtain a pressure oscillation waveform. A controller is electrically connected with the inflation device, the deflation device and the cuff pressure sensor. The controller controls the inflation device, the deflation device and the cuff pressure sensor to perform the inflation and deflation process on the cuff according to the non-invasive blood pressure waveform detection method and generate an envelope curve of blood pressure. The scheme shortens the cycle time of blood pressure measurement.

The invention relates to an oscillography blood pressure measurement method, system and device and a storage medium, and the method comprises the steps: controlling a cuff to be inflated to a first preset pressure, judging whether a user state accords with a measurement condition or not based on a collected first pressure signal and a first limb dynamic signal of a user, and if yes, judging whether the user state accords with the measurement condition; if yes, controlling the cuff to inflate to a second preset pressure and then executing deflation measurement; in the deflation measurement process, a second pressure signal and a second limb dynamic signal of the user are synchronously collected, a burst artifact time period is determined based on the second limb dynamic signal, the second pressure signal of the burst artifact time period is preprocessed based on a dynamic gating strategy, the obtained preprocessed pressure signal is converted into an envelope curve, and the envelope curve is subjected to deflation measurement; calculating a blood pressure value; compared with the prior art, according to the technical scheme, through state admission judgment before measurement and dynamic processing of sudden artifacts in measurement, non-resting state interference is avoided, the pressure signal purity can be improved, and then the accuracy and reliability of blood pressure measurement are improved.

This invention is a device to be used with a system for supplying anaesthetic or respiratory gases into the airway of a human or an animal. This device is a supraglottic airway device, which includes a shaft with three tubes one for ventilation purpose and rest two for dynamic cuff inflation and other for suctioning purpose. The dynamic cuff is inflated by the gases supplied directly from the anaesthesia or ventilator circuit through a specialised adaptor via dynalumen. The “cuff inflation lumen” (“DynaLumen”) will also be having a locking mechanism to enable its use like a conventional LMA; i.e., the cuff can be left continuously inflated both during positive pressure ventilation as well as less during expiratory phase and during spontaneous respiration.

The invention discloses an air pressure hemostat and a detection method and a control method thereof.The air pressure hemostat comprises a main control system and an air path control system, and the main control system comprises a control mainboard, an acquisition mainboard, keys and a touch display screen; the air path control system comprises an air pressure hemostasis cuff, a high-pressure air storage tank, a cuff connector, a pressurizing air pump, an air inlet electromagnetic valve, an exhaust electromagnetic valve, a low-speed exhaust valve, a pressure sensor and a pulse sensor. The air pressure hemostasis cuff is bound to the limb of a patient, the air pressure hemostasis cuff is inflated or deflated through the pressurizing air pump, the air inlet electromagnetic valve, the air exhaust electromagnetic valve and the low-speed air exhaust valve, the air pressure in the air pressure hemostasis cuff is adjusted, and the pulse sensor and the pressure sensor detect arterial pulse signals and pressure signals in real time. Therefore, the limb blocking pressure reference value and the hemostasis reference pressure are obtained. The system can accurately detect the limb blocking pressure reference value and the hemostasis reference pressure, is used for subsequent surgical operations, and improves the operation safety and efficiency.

The invention relates to an intelligent dynamic blood pressure and pulse rate monitoring method and system integrating multiple measurement methods, and the method comprises the steps: obtaining identity verification information inputted by a user, generating an encrypted user identifier, calling historical health data of the user, and generating a personalized monitoring scheme in combination with a preset instruction; collecting user motion state data in real time according to the body position parameters, and dynamically calibrating a cuff inflation pressure threshold value and a signal sampling frequency to obtain calibration configuration parameters; calling a corresponding sensor module to execute blood pressure and pulse rate measurement to obtain a blood pressure value collected by each blood pressure measurement method; when the standard deviation of the blood pressure values output by each blood pressure measuring method does not exceed a preset difference threshold value, outputting a weighted average value as effective blood pressure data; the effective blood pressure data and the user historical health data are merged and input into a neural network model to generate a blood pressure trend prediction curve, and the blood pressure trend prediction curve is encrypted based on the encrypted user identifier and then distributed to the user terminal equipment. According to the invention, the accuracy of measured data is improved.

Systemic lupus erythematosus (SLE) can be diagnosed by affixing a plurality of light sources and a plurality of light detectors against the subject's body near a joint, and sequentially transmitting light from each of the plurality of light sources into the subject's body. Signals are acquired from each of the plurality of light detectors. The rise time of the acquired signals that occurs in response to an inflation of a pressure cuff is determined, and an indication of whether the joint is affected by SLE is made based on the determined rise time. In some embodiments, a plateau time of the acquired signals is also acquired, and the indication of whether the joint is affected by SLE is made based on the determined rise time and the determined plateau time.

The application provides a kind of inductance-free sleep dynamic blood pressure rhythm analysis method and system, equipment, medium, it is related to medical or health data processing field.The application fuses BCG, PCG and EDR and other multi-modal information by cross attention mechanism, and adopts "in-group-inter-group" hierarchical modeling strategy, extracts robust features from whole night long-range data.The scheme can effectively resist signal noise and individual difference, realize more stable and reliable night blood pressure trend estimation than traditional method.The application realizes truly inductance-free monitoring: user only needs to lie on the sleep band integrated with sensor, without going to hospital, wearing electrode or bearing night cuff inflation interference.This mode completely solves the pain points such as poor compliance and data distortion of traditional scheme.The continuous and accurate blood pressure rhythm evaluation realized by the application provides a powerful means for early identification of independent risk factors such as "night high blood pressure" and "non-dipper / reverse dipper blood pressure".

This invention relates to a three-stage measurement state machine method, device, and storage medium for home arteriosclerosis detection, belonging to the field of home health monitoring technology. To address the problem of poor measurement stability in home settings, this method utilizes dual-wavelength PPG and multi-cuff pressure waveforms for collaborative measurement in a home environment, dividing the detection process into three stages: pre-measurement stability assessment, in-measurement dynamic control, and post-measurement recovery analysis. Stage A determines the stability window based on PPG quality and stability; Stage B calculates quality control indicators in real time and performs gating control during cuff inflation and deflation, outputting indicators such as baPWV, ABI, and blood pressure; Stage C continues to collect PPG after depressurization and calculates recovery indicators, generating interpretation labels and retest suggestions. This invention improves the stability and reliability of home arteriosclerosis detection results.