24 results about "Tissue pressure" patented technology

The invention relates to the field of intelligent control, and particularly discloses an anesthetic injection intelligent control system which predicts and generates personalized initial injection parameters by deeply integrating multi-source heterogeneous data such as patient individual information, surgical sites and anesthetic types. Through high-frequency collection of physiological and process signals such as tissue pressure and injection displacement, the system can accurately calculate the current actual pressure, the pressure change trend, the real-time flow rate and the total injected amount. The real-time monitoring data is continuously compared and evaluated with the generated personalized threshold value and the preset target so as to intelligently judge whether the current injection is smooth or not, whether abnormal resistance exists or not or whether the current injection is close to the target or not, and a mark reflecting the current injection state is generated according to the judgment result; and finally, the system dynamically adjusts the output of the injection pump according to the state flag in combination with a preset control logic and an optimization algorithm, and adaptively corrects the current target flow velocity.

This invention relates to a covered stent. Capable of radial collapse and expansion, it comprises a first occlusion portion, a stent middle layer, a second occlusion portion, and a support portion connected sequentially from a first end to a second end, and a covering membrane disposed in the first occlusion portion, the stent middle layer, and the second occlusion portion. The covering membrane serves to isolate blood flow. In the radially expanded state, because the outer diameter of the tubular stent middle layer is smaller than the outer diameters of the first and second occlusion portions, the covered stent is fixed to the blood vessel by the occlusion discs at both ends. The stent middle layer does not need to apply radial support force to the inner wall of the blood vessel for enhanced fixation, effectively avoiding tissue pressure. A support portion is provided at the second end of the second occlusion portion, and the outer diameter of the support portion is larger than the outer diameter of the second occlusion portion. The larger diameter effectively prevents the stent from being displaced towards the first end by blood flow, providing double protection for stent fixation.

The application relates to the field of urological surgery, and particularly discloses a urological clinical stone discharge device, which comprises a bed body and a control main body, and further comprises a detection assembly arranged on the upper side of the bed body, which detects the pain of a patient during stone discharge according to the holding force of the patient; the detection assembly can detect the pain of the patient during stone discharge according to the holding force of the patient, and can improve the body stability of the patient; the triggering assembly can automatically adjust the triggering threshold of the detection assembly for detecting the holding force of the patient according to the holding force of the patient at the initial stage, so as to adjust different triggering thresholds according to different patients, improve the applicability to different patients, and automatically stop the stone discharge when the holding force detected by the detection assembly reaches the triggering threshold, so as to prevent the increase of local tissue pressure, the induction of mucosal injury and the aggravation of spasm caused by continuously performing the stone discharge.

Pressure monitoring methods and systems for warning a patient or caregiver that soft tissue pressure has exceeded some predetermined level that over time would necessitate moving the patient to prevent or at least reduce a risk of soft tissue damage. The methods and systems entail the use of a pressure sensing unit adapted to be applied to or near a surface of the patient's body, and a sensor associated with the sensing unit to generate electrical outputs corresponding to soft tissue pressure sensed at the surface. The electrical outputs are wirelessly monitored over a preselected time period to generate a cumulative output signal based on the electrical outputs and corresponding to whether or not the soft tissue pressure has exceeded a predetermined pressure level during the preselected time period. An alarm is generated if the cumulative output signal exceeds a predetermined cumulative threshold until the soft tissue pressure drops below the predetermined pressure level.

A device for detecting and classifying artifact-causing events associated with hemodynamic parameter measurements based on analysis of tissue pressure signals indicative of pressure between a surface of a body part of a user and a cuff of a measuring device and actuator operating signals indicative of operating parameters of a pneumatic actuator associated with the cuff .

Marking device (100) for implantation into a tissue (260), having a support structure (102) which is formed by at least one elastic metal wire, is compressible and is self-expanding and which, in an expanded state, encompasses an interior space (104), characterized in that the marking device (100) is designed to transform itself on its own from a compressed state into an expanded state, even against a tissue pressure prevailing at a tissue site to be marked, and the marking device (100) in the expanded state has a hollow, approximately spherical shape.

The invention discloses a method for constructing a tension calculation model of inert gas in human tissues. The method comprises the following steps of: establishing a pressure change rate function of a certain tissue of a human body and performing form transformation to obtain a corresponding first-order inhomogeneous linear differential equation; constructing a standard form and a general solution form of a first-order inhomogeneous linear differential equation; the first-order inhomogeneous linear differential equation and the general solution form thereof are correspondingly assigned and substituted into the general solution form to obtain a general human body certain tissue pressure function; respectively constructing a pressure function g1 (x) of a certain tissue of the human body in a respiratory gas index pressurization scene, a pressure function g2 (x) of a certain tissue of the human body in a linear decompression scene and a pressure function g3 (x) of a certain tissue of the human body in a linear pressurization scene by using a universal pressure function of a certain tissue of the human body; and respectively constructing inert gas tension calculation models G1 (x), G2 (x) and G3 (x) of a certain tissue of the human body under the scenes of index pressurization, linear decompression and linear pressurization by using the g1 (x), g2 (x) and g3 (x) and the inert gas percentage content d.

The utility model provides a blood vessel closing device which comprises a base body, a rotary knob and a pressure detection unit. The base body is provided with a first suture channel and a knob accommodating cavity, and the first suture channel penetrates through and communicates with the knob accommodating cavity; the knob is provided with a second suture channel, the knob is rotatably arranged in the knob containing cavity around the rotating axis, and a gap is formed between the knob and the cavity wall of the knob containing cavity; when the knob is located at the initial position, the second suture channel is communicated and aligned with the first suture channel, and the suture is allowed to movably penetrate through; the knob is configured to drive the suture in the second suture channel and the suture in the first suture channel to be staggered when rotating from the initial position to the locking position, so that the suture is pulled to enter the gap to form drawing of the suture; the base body presses a target tissue under the drawing action of the suture; and when the knob rotates from the initial position to the locking position, the pressure detection unit is directly or intermittently extruded by the suture, so that the pressure of the matrix on the target tissue is obtained.

The present application is a method for constructing an inert gas tension calculation model in human tissue: a pressure change rate function of a certain tissue in a human body is established and is transformed to obtain a first-order non-homogeneous linear differential equation; a standard form and a general solution form of the first-order non-homogeneous linear differential equation are constructed; the first-order non-homogeneous linear differential equation and the general solution form are correspondingly assigned and substituted into the general solution form to obtain a general pressure function of a certain tissue in a human body; the general pressure function of a certain tissue in a human body is used to construct a pressure function g1(x) of a certain tissue in a human body under an exponential pressurization scenario of respiratory gas, a pressure function g2(x) of a certain tissue in a human body under a linear depressurization scenario, and a pressure function g3(x) of a certain tissue in a human body under a linear pressurization scenario; and the g1(x), g2(x) and g3(x) are used together with an inert gas percentage content d to construct inert gas tension calculation models G1(x), G2(x) and G3(x) of a certain tissue in a human body under the exponential pressurization, linear depressurization and linear pressurization scenarios.

The invention relates to a method for monitoring on-bed activity,-the method comprising detecting a change in body position of a target person lying on a target mattress (11TA) by using at least one pressure sensor (231-233) arranged to sense a pressure in at least one air chamber configuration (1101-1103) of the target mattress (11TA), and-determining whether the detected change in the body position of the target person is a tissue pressure relief body position change which substantially relieves the pressure of the tissue of the target person.

This application provides a monitoring system for prostate surgery, comprising a tissue pressure acquisition unit, a dynamic pressure difference acquisition unit, and a judgment unit; with the urethra as the Z-axis, the tissue pressure acquisition unit establishes a mapping relationship between the tissue pressure F and the Z-axis position by moving a force sensor along the urethra; the dynamic pressure difference acquisition unit detects bladder pressure P by moving a first pressure sensor along the urethra and a second pressure sensor. bladder Establish dynamic pressure difference ΔP sensor Mapping relationship with Z-axis position; dynamic pressure difference ΔP sensor Bladder pressure P bladder The fluid pressure P in the urethra sensor The difference; the decision unit is based on F and ΔP. sensor At least one of these methods involves marking specific locations in the prostatic urethra corresponding to candidate disease types. This allows for easy and accurate localization of abnormal features during prostate surgery, and the assignment of different markings to different disease types.

A means for detecting and classifying artefact-causing events associated with a hemodynamic parameter measurement based on analysis of a tissue pressure signal indicative of a pressure between a surface of the user's body part and a cuff of the measurement apparatus; and an actuator operational signal indicative of an operational parameter of a pneumatic actuator associated with the cuff.

According to one aspect, there is provided a computer-implemented method (300) for detecting artifacts in data acquired using a blood pressure measurement device, the method comprising: receiving (302) applied pressure data, the applied pressure data comprising data indicative of a pressure applied to a body part of a subject whose blood pressure is to be measured; receiving (304) tissue pressure data indicative of tissue pressure exerted by tissue of the subject on a sensor pad of the blood pressure measurement device; determining (306) a first derivative of the applied pressure data; identifying (308) that a magnitude of the applied pressure data in a first derivative of the applied pressure data satisfies a first defined threshold condition; defining a threshold condition by a first-order derivative; and in response to determining that the tissue pressure satisfies a second defined threshold condition for the predetermined duration of occurrence, determining (310) that an artifact is present in the tissue pressure data.

A method for deriving one or more hemodynamic parameters, including one or more measurements of blood pressure, based on obtaining a series of sample pulse wave signals at a series of applied pressures using a tissue pressure sensor integrated between a user's body and a pressure applicator, wherein the hemodynamic parameters are derived based on identifying characteristic points in the derived plots that indicate changes in pulse waveform morphology as a function of applied pressure.

Implantable device for recording intimate activities, comprising a hermetically sealed, biologically inert housing for permanent subcutaneous placement in the tissue near the vaginal wall, containing: • at least one myographic sensor for measuring muscular potentials, • at least one acoustic-mechanical transducer for measuring tissue pressure and structure-borne sound, • an electronic control unit with a processor unit and a non-volatile data storage, • a telemetry module for wireless data transmission, • and a rechargeable energy storage device with a wireless energy absorption unit.

The invention relates to an intelligent dynamic pressure-regulating closed-loop nursing urine collecting device for men, which belongs to the technical field of medical instruments and comprises a disposable unit and a reusable control unit. The disposable unit comprises a self-adaptive sealing ring with a dynamic pressure regulating function and an integrated urine volume sensing urine storage bag communicated with the self-adaptive sealing ring; the reusable control unit comprises a micro-pressure control system, a capacitance-urine volume measurement module and a main controller. The micro-pressure control system is used for inflating and deflating the self-adaptive sealing ring according to an instruction of the main controller so as to maintain proper reference pressure, and automatically performing periodic pressure fluctuation adjustment when urination is monitored; the capacitance-urine volume measurement module senses the urine volume change in the urine storage bag in real time and converts the urine volume change into an electric signal; the main controller receives the signal and judges the urination state, and therefore the micro-pressure control system is controlled to form closed-loop nursing. The device can effectively prevent local tissue pressure sores, and real-time monitoring and intelligent intervention in the urination process are achieved.

Current surgical clips often fail to adequately engage with and compress small blood vessels, or they may impart uneven pressure distribution to the compressed tissue. Therefore, this new design aims to mitigate or overcome one or more of the problems associated with conventional surgical clips. [Solution] The surgical clip may include a first leg member having an inner surface, an outer surface, and first and second sides, wherein the inner surface of the first leg member has a concave curve; a second leg member having an inner surface, an outer surface, and first and second sides, wherein the inner surface of the second leg member has a convex curve; at least one first tooth extending from a first side edge of the inner surface of the second leg member; and a first channel defined between the first side and the inner surface of the first leg member. The first and second leg members may be configured to move between an open configuration and a closed configuration, in which at least one first tooth is received within the first channel.

The invention belongs to the field of biomedical materials, and particularly relates to application of glucomannan hydrogel simulating a skin extracellular matrix. The hydrogel couples a (DOPA) 4-G4-GRGDS polypeptide to the backbone of a glucomannan (GM) through a dynamic and acid sensitive imine linkage. The hydrogel simulates a glycopeptide component and a nanofiber structure of a skin extracellular matrix, creates a favorable microenvironment for proliferation and migration of cells, can reduce local inflammation of a wound, promotes angiogenesis and tissue repair, and achieves the purpose of promoting deep tissue pressure injury healing without any other therapeutic agent. Therefore, the hydrogel dressing disclosed by the invention has great clinical transformation prospects and economic benefits.

An all-terrain travel robot with an anti-bedsore massage function is provided with a motion control unit, an independent motion lifting wheel set system and a gyroscope sensing module, various preset swing modes are arranged in the motion control unit, and the gyroscope sensing module is electrically connected with the motion control unit and feeds back a vehicle body attitude angle in real time. The motion control unit controls the independent motion lifting wheel set system to move according to the swing mode and the posture feedback signal, and the motion of the independent motion lifting wheel set system drives the whole all-terrain travel robot to move according to a preset swing mode, so that the body of a passenger is driven to slightly move, local tissue pressure is relieved, blood circulation is promoted, and the safety of the passenger is improved. The effects of anti-bedsore massage and joint movement are achieved, and meanwhile the risks of pressure sores and deep venous thrombosis are reduced.

The invention discloses a contact type ultrasonic deep tissue pressure measuring instrument and a deep tissue pressure monitoring method, and relates to the technical field of medical instruments. The pressure measuring instrument comprises an ultrasonic probe body, a grip strength detection module, a data processing module and a wireless transmission module. A deep learning model is arranged in the data processing module, and non-invasive, accurate and real-time measurement of deep tissue pressure is achieved by synchronously fusing grip signals of an operator and tissue deformation data in an ultrasonic image. The method comprises the steps of synchronous acquisition of grip strength and ultrasonic images, signal preprocessing, multi-modal deep learning fusion calculation and result wireless transmission and display. The problem of accurate monitoring of deep tissue pressure is solved, and the method is suitable for pressure treatment scenes such as lower limb deep vein thrombosis prevention and the like.

A system for non-invasive hemodynamic parameter measurement includes a cuff having a pressure actuator and a tissue pressure sensor, where the tissue pressure sensor includes a fluid pad hydraulically connected to a fluid pressure transducer unit. Provided is a height monitoring device for tracking changes in a transducer unit relative to a cuff and a height of the cuff relative to a heart level of a patient, wherein the heart level is indicated by an agent by using a height reference unit mounted to the torso of the patient. Variations in these relative heights are used to calculate corrective parameters of the tissue pressure signal. In some embodiments, a height change of each of the cuff, transducer unit, and height reference unit may be tracked independently. In some embodiments, this is accomplished by motion tracking of each cell and aggregation of net motion to determine a change in position.

The invention relates to the technical field of medical instruments, and provides a puncture indicating device and a system and method using the puncture indicating device. Comprising a puncture needle and a hard bottle body which can be connected with each other, wherein at least one end part of the hard bottle body is provided with a sealing element, and the sealing element can keep the sealing state of the hard bottle body before and after the liquid medicine is injected; the hard bottle body is at least partially transparent and is used for observing the descending distance of the liquid level in the vertical liquid cavity in the hard bottle body. The device has the beneficial effects that liquid medicine (normal saline) is injected into the sealed hard bottle body which is at least partially transparent in advance, and the liquid medicine extrudes a gas medium in the hard bottle body to compress the gas medium; firstly, the puncture needle is punctured into a human body, then the hard bottle body and the puncture needle are connected, and then puncture is continued; when the puncture needle penetrates through the ligamentum flavum (entering the epidural space) of a human body, the liquid level height of the liquid medicine in the hard bottle body is obviously reduced under the action of the pressure of the compressed gas medium in the bottle no matter whether the pressure in the epidural space is negative pressure or weak positive pressure lower than the tissue pressure.

The invention relates to a control device for controlling a blood pressure measurement system. An applicator applies increasing pressure to a subject's part in a measurement time period, while the pressure (TP) on the skin of the subject's part, which comprises a plurality of pressure pulses (9), is measured. For each pressure pulse of at least some of the plurality of pressure pulses, several features, which characterize the respective pressure pulse, are determined, wherein an end measurement time point (32), at or after which the measurement time period is to be stopped, is determined based on these features, and wherein, when or after the end measurement time point has been reached, i.e. when the measurement time period is to be stopped, the applied pressure is decreased to start the following post-blood-pressure-measurement time period. This allows for a reduced blood pressure measurement time and maximum tissue pressure exerted on the skin.

A system for use in non-invasive hemodynamic parameter measurement which comprises a cuff having a pressure actuator and a tissue pressure sensor, where the tissue pressure sensor comprises a fluid pad hydraulically connected to a fluid pressure transducer unit. Provided is a height monitoring means for tracking a change in a height of the transducer unit relative to the cuff and the cuff relative to a heart level of the patient, wherein the heart level is indicated by proxy using a height reference unit mounted to the patient's torso. Changes in these relative heights are used to compute a correction parameter for the tissue pressure signal. In some embodiments, changes in height of each of the cuff, transducer unit and height reference unit may be independently tracked. In some embodiments, this is done by motion tracking of each unit and aggregating net motion to determine position change.