37 results about "Cuff inflation" patented technology

This invention, which offers the advantage of an automatic repetitive blood pressure measurement that minimizes discomfort for the subject while continuously measuring blood pressure regardless of the subject's movement, thereby enhancing the reliability of the measurement results, which leads to the development of an automatic repetitive blood pressure measurement device and method for a smart blood pressure monitor, relates to blood pressure measurement technology, involving periodically repeating the inflation and deflation of a cuff a set number of times upon receiving a single operation signal input. The method includes the steps of detecting arterial wall vibrations when the cuff pressure is between the systolic and diastolic pressures of the artery during cuff inflation and deflation, recognizing the point where maximum vibration is detected as the systolic blood pressure based on the detection results, recognizing the diastolic blood pressure if the vibration decrease exceeds a threshold, and providing measurement results sequentially, including the recognized systolic and diastolic blood pressure values during the repeated inflation and deflation of the cuff a set number of times.

A method of estimating the reliability of cardiac output (CO) measurements obtained using an arterial waveform analysis (AWA) technique calibrated using thermodilution. During thermodilution calibration: (i) initiating inflation of a cuff that is at a location on the subject, (ii) obtaining a first cuff pressure signal comprising measurements of pressure inside the cuff during inflation, (iii) analyzing the first cuff pressure signal to derive a relationship between oscillations in arterial volume beneath the cuff and pressure in the arteries, and (iv) estimating a first arterial compliance of the arteries for a range of cuff pressures based on the determined relationship, (b) during a second time period that is after the first time period, repeating steps (i)-(iv) to estimate a second arterial compliance of the arteries, and (c) using a result of a comparison of the first arterial compliance and the second arterial compliance to determine a reliability of CO measurements.

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.

Air pump connectors, ports, and holders that reduce damage to the connection between the inflation device and cuff and / or reduce pressure leakage between the inflation device and cuff so as to better control the inflation of the cuff by the inflation device and / or to better maintain the inflation of the cuff. The modified port on the cuff can be used inhibit or prevent the opposite air bladder surface from covering the bottom of the port, thus preventing the port from sealing. The modified port on the cuff can be configured to fit with the air-ports on an inflation device to inhibit or prevent the port on the cuff from dislodging from the housing of the inflation device, which dislodgement can result in air leakage between the inflation device and cuff.

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.

The utility model mainly relates to a tracheal catheter for thoracic surgery, and discloses a double-bronchial ventilation catheter which comprises a tracheal catheter body and a catheter cuff arranged on the outer wall of the tracheal catheter body, the catheter cuff is connected with a catheter cuff inflation tube, and the lower end of the tracheal catheter body is divided into two bronchial catheter bodies with the same size. Each bronchial catheter is provided with a bronchial catheter outer cuff and a bronchial catheter inner cuff, the bronchial catheter inner cuff and the bronchial catheter outer cuff are connected with a bronchial catheter cuff inflation tube, and the bronchial catheter inner cuff can protrude outwards to be tightly attached to the inner wall of the bronchial catheter when the bronchial cuff is inflated, so that the bronchial catheter can be sealed. The design has the advantages of simplicity in operation, accuracy in alignment and few clinical complications.

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.

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.

A blood pressure measurement device for estimating a blood pressure value using pulse wave data, having: a cuff for compressing a part under measurement; a sensor that detects the pressure of the cuff; a pulse wave acquisition unit that acquires pulse wave data from an output signal from the sensor; an index estimation unit that, at a prescribed periodicity, performs index estimation processing to estimate an index on the basis of the pulse wave data acquired up to the present time while the cuff is gradually pressurized, said index expressing the position of the present time with respect to a predicted envelope that is predicted to be obtained if the pressurization of the cuff is continued; and a pressurization control unit that stops the pressurization of the cuff when the value of the index estimated by the index estimation processing reaches a predetermined threshold.

The invention belongs to the technical field of medical instruments, and discloses a desk type electronic sphygmomanometer which comprises a shell unit, a detection main control unit and an inflation constraint unit, the shell unit comprises a lower shell and an upper cover hinged to the lower shell, and the detection main control unit comprises an air path assembly and a display detection assembly. The air channel assembly comprises an air channel pipe and an exhaust structure communicated with the air channel pipe, the inflation constraint unit comprises a cuff capable of being communicated with the air channel pipe and a pressurization ball capable of inflating the cuff, and the pressurization ball is provided with a manual valve capable of exhausting air for the cuff; the desk type electronic sphygmomanometer has the first measuring mode and the second measuring mode, in the first measuring mode, the cuff exhausts air through the exhaust structure, in the second measuring mode, the cuff exhausts air through the manual valve, and therefore the measuring comfort of a patient is improved when the blood pressure of the patient is measured through an auscultation method, and the measuring efficiency is improved. The situation that complaints of the patient are easily caused is avoided, and the measurement experience of the patient is improved.

The utility model discloses a nerve monitoring trachea cannula and a monitoring system, which comprise a trachea cannula body, an inflation cuff, an inflatable cuff inflation tube, an indication balloon and a trachea cannula joint, an electromyographic signal detection unit is arranged at a set distance of the inflation cuff far away from an insertion port end, and a contact electrode is used for indirectly transmitting nerve stimulation signals. Real-time monitoring of recurrent laryngeal nerves in a thyroid surgery is achieved, and nerve injury is avoided while the accuracy rate of a monitoring result is high; the curvature sensor is arranged in the trachea cannula body between the inflatable cuff and the electromyographic signal detection unit, so that the bending degree of the trachea cannula is monitored in real time, a doctor is assisted in catheter placement, and soft tissue injury is avoided.

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.

Air pump connectors, ports, and holders that reduce damage to the connection between the inflation device and cuff and / or reduce pressure leakage between the inflation device and cuff so as to better control the inflation of the cuff by the inflation device and / or to better maintain the inflation of the cuff. The modified port on the cuff can be used inhibit or prevent the opposite air bladder surface from covering the bottom of the port, thus preventing the port from sealing. The modified port on the cuff can be configured to fit with the air-ports on an inflation device to inhibit or prevent the port on the cuff from dislodging from the housing of the inflation device, which dislodgement can result in air leakage between the inflation device and cuff.

The present invention relates to device, system and method for calibrating a blood pressure, BP, measurement function. The device comprises a pressure input (51) configured to obtain time-dependent cuff pressure values during inflation and / or deflation of a cuff (11) of a pressure-delivery system (10) attached to a subject's body part; a sensor input (52) configured to obtain a first time-dependent sensor signal and a second time-dependent sensor signal, both related to the subject's heartbeat and measured during the inflation and / or deflation of the cuff; and a processing unit (53) configured to calibrate the blood pressure measurement function based on a reference BP value, a computed pulse-related value and a computed derivative value of the derivative of the fitting function at the reference BP value.

The invention belongs to the technical field of animal detection, and particularly relates to a mute pet blood pressure measuring device and method based on a piezoelectric ceramic air pump, and the device comprises a control system, the piezoelectric ceramic air pump, a pressure sensor and a cuff; the cuff is connected with the piezoelectric ceramic air pump through an air path and is used for wrapping a tested limb and applying pressure; the piezoelectric ceramic air pump adopts ceramic ultrasonic vibration as a driving source to inflate the cuff, and the pressure sensor collects an air path pressure signal in real time and feeds back the air path pressure signal to the control system; the control system is electrically connected with the piezoelectric ceramic air pump and the pressure sensor, and the control system dynamically adjusts the driving voltage of the piezoelectric ceramic air pump through a PID algorithm based on the difference value between a pressure signal collected by the pressure sensor and preset target pressure so as to control the inflation and deflation flow of the cuff, and turbulence-free mute inflation and deflation are achieved. Compared with the prior art, noise generated in the blood pressure measuring process is reduced or eliminated through mutual cooperation of all the systems.

According to an aspect there is provided an inflation apparatus (10) for use with an inflation-based non-invasive blood pressure, NIBP, measurement apparatus, the inflation apparatus comprising: an outlet (110) configured to be coupled to a cuff of the inflation-based NIBP measurement apparatus; a pump (120) configured to output a flow of gas at an output flow rate; a valve (130) disposed along a flow path between the pump and the outlet to selectively pass part of the flow of gas output by the pump; and a control unit (140) configured to control the flow resistance of the valve to provide a flow of gas to the outlet at a required flow rate for inflating the cuff.

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.

A system for controlling and monitoring flow in a cuffed endotracheal tube device is disclosed. The system comprises: a connector panel having at least three connectors adapted for establishing fluid communication with proximal ends of at least a first fluid line, a second fluid line and a cuff inflation line of the endotracheal tube device. The system can further comprise a processing unit and a control unit, wherein the processing unit is configured to instruct the control unit to execute various operations, including at least a rinsing procedure, a suctioning procedure, a cuff inflation procedure, a leak detection procedure and a venting procedure, and to select any of the first and the second fluid lines for any of the rinsing, suctioning, leak detection and venting procedures. In some embodiments, the system exploits the cuff as sensor to sense pulmonary data.

To stably measure blood pressure with cuff pressure lower than systolic blood pressure. This blood pressure measurement device includes: a cuff wound around a measurement site; a pressure detection unit for detecting the cuff pressure in the cuff; a pressure control unit for controlling the cuff pressure; a pulse wave acquisition unit for acquiring pulse waves of a subject from the cuff pressure; a blood pressure calculation unit for calculating the blood pressure of the subject on the basis of the pulse waves acquired before the cuff pressure reaches a stop cuff pressure at which pressurization of the cuff is stopped; and a stop cuff pressure determination unit for determining the value of the stop cuff pressure on the basis of characteristics of the pulse waves acquired at a cuff pressure lower than the stop cuff pressure.

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 PPG pulse wave principle blood pressure measurement system based on an intelligent ring, and relates to the field of artificial intelligence, and the system comprises a position layout module, a signal acquisition and preprocessing module, a calculation and modeling module, an error calibration module and a blood pressure measurement module. Through deep analysis of historical data and utilization of a deep learning model, a PPG optical sensor is adopted, blood flow changes are optically detected, noninvasive measurement is achieved, and discomfort caused by inflation of a traditional cuff is avoided. Through a low-power-consumption mode, all-weather monitoring of blood pressure changes can be achieved, and interference-free ambulatory blood pressure tracking is achieved. The intelligent ring is worn on the finger, the blood flow at the tail end is rich, the PPG signal is clearer and more stable, and the measurement precision is higher. The PPG signal quality of different finger parts is automatically detected through a multi-sensor signal quality adaptive selection algorithm, and the index finger with the optimal signal is selected for measurement, so that the accuracy is improved.

The invention relates to the technical field of electronic blood pressure measurement, and discloses an oscillography-based arm type electronic blood pressure measurement system integrating pulse detection. The pressure signal acquisition module acquires a pressure signal required by oscillography measurement through the cuff, the pulse signal acquisition module synchronously detects a pulse fluctuation signal, and the data processing module performs feature extraction on the two types of signals and integrates the two types of signals into a comprehensive physiological information set. The air channel control module regulates and controls the inflation and deflation process of the cuff, and the pressure change rate is maintained to be matched with oscillography measurement. The storage module is used for storing comprehensive physiological information and historical data, the display module is used for visually displaying a measurement result, and the abnormity processing module is used for starting a standby sensor to carry out secondary verification when a signal is abnormal. The system is provided with a signal protection module and a calibration module which are respectively used for signal encryption protection and sensor periodic calibration. The system realizes synchronous acquisition and processing of blood pressure and pulse signals, and provides comprehensive physiological information monitoring and management functions for users.

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.

A blood pressure measuring apparatus with a cuff comprises a cuff, an inflation unit, a deflation unit, a pressure sensor, a signal record and storage unit, and an operation and analysis unit. The operation and analysis unit is used to control the inflation unit and the deflation unit to increase the pressure within the cuff to a first pressure, maintain the pressure at the first pressure for a specified interval, then increase the pressure to a second pressure, and decrease the pressure. The blood pressure measurement is accordingly finished. The operation and analysis unit calculates an arteriosclerosis index based on a pulse waveform signal when the adjustable pressure unit maintains the pressure at the first pressure.

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.