45 results about "Doppler probe" patented technology

A flat ultrasound probe includes a housing having sidewalls, each having a height, a bottom surface for contacting an external surface of a patient during operation of the probe, the bottom surface having a width larger than the height of the sidewalls and a flat portion, and a recession in the bottom surface for containing a transmission material on an outer surface of the housing for aiding in transmission of ultrasound signals, the recession being rounded on all sides where the recession contacts the flat portion of the bottom surface.

A hemostatic compression system facilitates patent hemostasis of an arterial access site on the arm of a wearer. The system includes a radial compression band and a Doppler probe. The radial compression band includes an elongated arm band sized to receive the arm. The compression band also includes a pressure surface coupled to the arm band and facing radially inward for compressive engagement with the access site. The Doppler probe is coupled to the arm band adjacent the pressure surface and is configured to sense blood flow through the artery. Hemostatic compression applied by the radial compression band is variable in response to the sensed blood flow so as to ensure patency of the artery during hemostasis of the site.

Disclosed is ultrasonic medical probe (10) connectable to a Doppler signal generator and processor for detecting or measuring blood flow in a vessel. In one embodiment, the distal portion (52) of the probe comprises an outer sheath (17) that includes a malleable shapeable portion (16), such as an annealed stainless steel cannula, to which a transducer head (11) containing one or more ultrasonic transducers (12), is mounted distally. Two wires (14, 15), comprising the electrical conductor (13), extend through the outer sheath from each ultrasonic transducer to a proximal connector (19). The shapeable portion can be contoured before or during a procedure, such as to access the natural spaces within brain to read flow in a cerebral artery. Other disclosed embodiments includes a shapeable portion that includes a malleable core wire (33) around which the wires are wrapped, an electrical conductor comprising malleable wires (36, 37) that are shapeable, a transducer head that is extendable from inside the outer sheath, and a handle portion (18) that is axially moveable for adjusting the length of the shapeable portion.

A hemodynamic method and instrument for early diagnosis of cerebrovascular diseases features that the Doppler probe and ultrasonography B are used to detect the blood flowing speed, the ultrasonography B is used to detect the physical characteristics of blood vassel, the diameter and wall thickness of blood vessel are measured to obtain the flow of blood in the vessel, and a pressure probe is used to detect blood pressure.

An ultrasonic Doppler probe is provided for use in connection with non-invasive Doppler imaging of fluid flow within the human body. The Doppler probe can be selectively operated at more than one frequency during the course of a Doppler imaging examination thereby enhancing the resolution of the image obtained while also increasing the effective depth of the image. The probe of the present invention employs piezo-electric materials for the formation of acoustic transmitting and receiving transducers that are positioned within the probe to allow the probe to be selectively operated at a number of different frequencies spanning no more than one octave in frequency range.

The invention discloses a single-shot multi-information diagnostic target. The diagnostic target is characterized in that a positive plate impacts a substrate at a high speed, and enters a sample through the substrate to conduct shock compression; the shock wave is reflected back and forth between the substrate with high shock impedance and a composite window to compress the sample multiple times so as to generate a high-temperature and high-pressure plasma and send light radiation; the light radiation enters a multi-channel radiation pyrometer and a time-resolved spectrometer through the composite window and a fiber bundle to synchronously measure the shock luminous radiation history and the time-resolved transient spectra; the interface particle velocity of the shock wave changes when the shock wave is reflected between the sample and the window interface; and the particle velocity profile is measured by a Doppler probe system. The state parameters of the sample compressed for multiple times can be determined through correlation analysis of the particle velocity profile and the shock luminous radiation history in combination with the impedance matching method. The diagnostic target has a compact structure, and can achieve the synchronous measurement of multiple state parameters of the plasma in the same single-shot experiment, such as shock wave velocity, particle velocity, pressure, temperature, density and time-resolved transient spectra.

A Doppler blood flow monitoring system comprises a sensor cuff capable of being secured around an exterior surface of a patient's vessel, at least one transducer attached to the sensor cuff for generating signals into the vessel and for receiving said signals, and a transmitter in communication with the at least one transducer and capable of wirelessly transmitting an RF signal external to the patient's body. The system also comprises a receiver capable of receiving the RF signal from the transmitter and being capable of generating an audible sound or signal commensurate with detected flow. The system can take advantage of pulse wave or continuous wave Doppler technology.

The invention relates to the field of medical instruments, and particularly relates to a peripheral vascular comprehensive tester which comprises a shell, a single-chip microcomputer, a detection probe, a blood-pressure cuff airbag and an air pump. The single-chip microcomputer is arranged in the shell, and the detection probe is electrically connected with the single-chip microcomputer; the air pump is arranged in the shell and is electrically connected with the single-chip microcomputer; the air pump is communicated with the blood-pressure cuff airbag and is used for pumping air into the blood-pressure cuff airbag; an electromagnetic valve electrically connected with the single-chip microcomputer is arranged at the position where the blood-pressure cuff airbag is communicated with the air pump; a pressure sensor electrically connected with the single-chip microcomputer is arranged on the blood-pressure cuff airbag; the detection probe includes a Doppler probe and a PPG (poly propylene glycol) probe, and the peripheral vascular comprehensive tester further comprises an air pulse control module. During testing of peripheral vascular, blood pressure is automatically captured through the pressure sensor, and a user does not need to fix blood flow waveform and a blood pressure monitor, so that convenience is brought to the user, and accuracy of measurement data is improved.

The invention discloses an existence detection method and device. The existence detection method is used for dynamically detecting the existence state of larger moving subjects (e.g. people and automobiles) in a control deploying space. According to the method, the Doppler effect is utilized and the peak value and frequency of received signals are analyzed to judge existence of the larger moving subjects in the control deploying space through a microwave induction detection device, and the detection result is outputted in different signals so that a load is controlled to correspondingly respond to the detection result finally. The beneficial effects of application of the existence detection method and device are that the novel dynamic detection method and device for space existence are provided, and micro-movement of the moving subjects after entering the space can be effectively detected by the method; besides, the Doppler effect is utilized by the detection method so that no material can deliberately avoid detection; and the detection device comprises a Doppler probe and a microprocessor so that the detection device is low in cost and low in the requirement for software and hardware.

A system is disclosed for the detection of blood flow. The system provides, a portable transceiver unit having a signal generator, a signal comparator, and an audio output whereby a user receives an audio signal indicating differences in Doppler signal, and a Doppler probe coupled to the portable transceiver. The Doppler probe including a piezoelectric crystal disposed at a first end of the Doppler probe; at least one wire transmitting signals between the transceiver unit to the piezoelectric crystal; a rigid or flexible sheath disposed around at least part of the at least one wire and the piezoelectric crystal; and a transceiver unit coupler disposed at a second end of the Doppler probe. The system may also have a quantitative blood flow meter or signal strength meter.

The invention discloses a fetus-voice meter for gynecology and obstetrics, including a fetus-voice meter body. A PLC control is arranged at that middle position of the front side of the main body of the fetus-voice meter. A wireless transceiver is arranged at a position close to the left side of the front side of the fetus-voice meter main body. A work indicator lamp is arranged at a position close to the right side of the front side of the fetus-voice meter main body. A loudspeaker and a memory are respectively arranged at positions close to that front side surface of the upper surface of thefetus-voice meter main body, the front side of the memory is provided with a USB socket. An accumulator is arranged at that position of the upper surface of the main body of the fetus-voice meter near the rear side surface. A Doppler probe is conveniently protected through the arrangement of a placement groove and a cover plate in the fetus-voice meter, so that the Doppler probe is prevented frombeing damaged, the accuracy of the detection is affected. The fixing bolt, the telescopic rod and the fixing barrel are convenient to support the main body of the fetus-voice meter, and the fixing bracket and the fixing shaft are convenient to carry the fetus-voice meter for the gynecology and obstetrics clinic, and the device is convenient to use.

The invention discloses a device for detection a cerebral blood flow regulation function, which belongs to the technical field of biomedical engineering. The device comprises a piezoelectric ceramic plate (1), a fixed elastic ribbon (2) of the piezoelectric ceramic plate (1), a trans-cranial Doppler probe module (3), a detection box (5), a light-emitting diode (6) and a phase difference result display LED (7), wherein the piezoelectric ceramic plate (1) is used for measuring pulse waves; the trans-cranial Doppler probe module (3) is used for measuring medium-sized artery blood flow velocity waves; the light-emitting diode (6) is arranged on the detection box (5) and is used for indicating effective characteristic waves; and the piezoelectric ceramic plate (1) and the trans-cranial Doppler probe module (3) synchronously measure signals and are connected with a respiratory frequency band characteristic wave extraction and phase difference detection circuit arranged in the detection box (5) through a connecting wire (4) respectively. The device needs no external artery blood pressure control, has high use safety, uses the piezoelectric ceramic plate to measure pulse pulsation signal waveforms from a wrist directly, and evaluates the cerebral blood flow regulation function according to phase changes of respiration characteristic waves of pulse and the cerebral blood flow, and has the advantages of use safety, simple and convenient operation, quick measuring and processing speed and high performance price ratio.

This invention provides a method and a device for detecting occlusion and / or reopening of an artery of a body caused by a changing pressure applied on the artery as well as a system for measuring the systolic blood pressure of an artery of a body. The method comprises the steps of: obtaining a blood flow signal indicative of a change of the blood flow in the artery caused by the changing pressure, using a Doppler Ultrasound transducer attached to the exterior of the body; deriving, from the blood flow signal, at least one variable of a first variable indicative of the magnitude of the blood flow and a second variable indicative of the periodicity of the blood flow; and detecting the occlusion and / or reopening of the artery on the basis of the at least one variable. In this way, the occlusion / reopening of the artery can be detected automatically. Since the need to manually detect the occlusion and reopening of the artery by listening with a stethoscope or a Doppler probe is eliminated, the detecting result is more predictable and repeatable, and therefore also more accurate.

Devices, systems and methods for performing arthroscopic evaluations and procedures in and near the hip joint are provided. An arthroscopic probe having a Doppler probe disposed on a movable tip portion is useful for determining blood flow and for identifying vascular structures. An arthroscopic probe having a Doppler probe and a radiofrequency (RF) source disposed on a movable tip portion provides further useful features including the ability to perform cauterization, tissue ablation, and other RF procedures. The devices, systems, and methods are effective to assist an operating surgeon in the assessment of femoral head blood supply before, during, and after procedures involving the hip joint and optionally to provide for RF procedures in concert with such assessments of blood flow. The devices, systems, and methods of the present invention aid in arthroscopic procedures, and are useful in reducing the risk of iatrogenic hip joint avascular necrosis (AVN).

The invention discloses a gynecological clinical fetal heart monitor, comprising a housing. A Doppler probe is mounted at the bottom of the housing. The lateral side of the housing is fitted with an open-source single-chip microcomputer, an indicator and a power source; the top of the housing is fitted with a speaker and a wireless transceiver; a handle is fixed to the top of the housing and is ofU-shaped structure. The gynecological clinical fetal heart monitor has the advantages that the indicator is used to display an activity range of fetal heart, allowing medical staff to reasonably diagnose condition of a patient according to indicative information; an information storage device is used to store fetal heart information, allowing medical staff to monitor the condition of the patientfor long time and improving diagnostic accuracy; a sliding mechanism allows the housing and the information storage device to be movably connected, the housing and the information storage device are convenient to assemble and disassemble, it is convenient to use the fetal heart information as a souvenir for collection, and the needs of patients are met accordingly.

The invention relates to a tourniquet with good usage effect, wherein, the invention comprises an aerated zone with a gas bag, a gas filled tube is connected to the aerated zone and communicated with the aerated zone, a Doppler blood vessel survey meter is connected to the gas filled tube and communicated with the gas filled tube, a Doppler probe is arranged on the Doppler blood vessel survey meter, a pressure meter is arranged on the Doppler blood vessel survey meter, the gas filled tube is communicated with the pressure meter, a charging device is arranged on the Doppler blood vessel survey meter, and the gas filled tube is communicated with the charging device.

The invention relates to a transcranial Doppler device and belongs to the technical field of medical equipment. The transcranial Doppler device comprises a main transcranial Doppler device body, a Doppler probe device and an image processing device, wherein an input equipment support plate is arranged on the front side of the main transcranial Doppler device body, input equipment is arranged on the input equipment support plate, a mouse storage slot is formed in the right side of the input equipment, an operating desk is arranged on the upper side of the input equipment support plate, a power button is arranged on the operating desk, an image adjusting button is arranged on the right side of the power button, a probe detection button is arranged on the right side of the image adjusting button, a display screen base is arranged on the main transcranial Doppler device body, and the upper side of the display screen base is connected with a display screen bracket. The transcranial Doppler device has comprehensive functions and is convenient to use, the transcranial Doppler device is time-saving, labor-saving, scientific, convenient, safe and efficient when used for detecting blood flow dynamics of encephalic basilar main artery of a patient, and the work difficulty of a medical worker is greatly reduced.

The invention discloses a remote fetus information sharing device, which comprises a touch sensor, a signal processing circuit, an acceleration sensor, a Doppler probe, an ARM chip, a time chip and a GPRS (General Packet Radio Service) module, wherein the output end of the touch sensor is connected with the signal processing circuit; the output ends of the Doppler probe and the acceleration sensor are connected with the input end of the signal processing circuit respectively; the output end of the signal processing circuit is connected with the ARM chip; the output end of the time chip is connected with the input end of the ARM chip; and the GPRS module is used for receiving information output by the ARM chip and transmitting the received information to an external user terminal. According to the invention, the fetal movement information and fetal heart information of a fetus detected in real time can be transmitted to the GPRS module of a mobile phone or other equipment, so that remote transmission and sharing of fetus information are realized.

A laser Doppler flowmetry probe and method for monitoring blood flow in a locus of a tissue medium proximately located at the distal end, the probe having a proximal and distal end and comprising: an optical conductor, having one end located at the distal end, an opposite end located at the proximal end and having a central axis, that guides radiation to said distal end and guides radiation scattered from the tissue medium to the proximal end for providing an indicative of the blood flow in the locus of the tissue medium; and wherein the distal end of the optical conductor is angled with respect to the central axis of the optical conductor so as to provide maximal contact with the tissue.

This invention provides a method and a device for detecting occlusion and / or reopening of an artery of a body caused by a changing pressure applied on the artery as well as a system for measuring the systolic blood pressure of an artery of a body. The method comprises the steps of: obtaining a blood flow signal indicative of a change of the blood flow in the artery caused by the changing pressure,using a Doppler Ultrasound transducer attached to the exterior of the body; deriving, from the blood flow signal, at least one variable of a first variable indicative of the magnitude of the blood flow and a second variable indicative of the periodicity of the blood flow; and detecting the occlusion and / or reopening of the artery on the basis of the at least one variable. In this way, the occlusion / reopening of the artery can be detected automatically. Since the need to manually detect the occlusion and reopening of the artery by listening with a stethoscope or a Doppler probe is eliminated, the detecting result is more predictable and repeatable, and therefore also more accurate.

The invention relates to a split type rectoscope ultrasonic Doppler probe which comprises an ultrasonic transducer mounted on a shell, wherein the shell comprises an outer sleeve, an inner sleeve and a handle connected with the inner sleeve; the outer sleeve is a tubular body with one end being closed; a ligation window is arranged on a side wall of the tubular body; a surgical operation port is arranged at an unclosed end of the tubular body; a ligation positioning clamping slot and a transfixion positioning clamping slot are symmetrically distributed at an edge of the surgical operation port; the ligation positioning clamping slot and the ligation window are located on the same side of the tubular body; the inner sleeve is a pipe body with two ends being communicated; the length of the inner sleeve is smaller than the length of the outer sleeve; the ultrasonic transducer is mounted at one end of the pipe body of the inner sleeve; a port for mounting the handle is arranged at the other end of the pipe body of the inner sleeve; the port for mounting the handle and the ultrasonic transducer are arranged on the same side of the pipe body of the inner sleeve; a transfixion window is arranged on the other side, opposite to the ultrasonic transducer, of the pipe body of the inner sleeve. A split structure is adopted by the split type rectoscope ultrasonic Doppler probe; a ligation function of an original Doppler probe is maintained; the probe is creatively designed as the split structure and two operation stations can be formed, so that the ligation and suspension transfixion for haemorrhoid can be performed under the same probe.

The invention discloses a String body model device for an ultrasonic transcranial Doppler blood flow analyzer. A cavity of a water tank is provided with a support rod for hanging a Doppler probe, and a Doppler string rotates on the bottom surface of the water tank through a pulley block driven by a first motor. The first motor is driven by a controller unit. The main calibration items are blood flow velocity error, blood flow detection depth and blood flow direction identification. By injecting a proper amount of water or medium into the water tank as a human body medium and by clamping the Doppler probe with a rotatable, identifiable and angle-adjustable clamp unit, a spectrum is acquired. By moving the Doppler probe along a horizontal direction of the string transmission through a screw rod and performing the motion measurement, the parameters required for the blood flow velocity error, the blood flow detection depth and the blood flow direction identification are measured. The string body model device is simple in structure, cheap in production and maintenance cost, difficult to damage, easy to scrub, and compliant to relevant standards as a whole, and has high practicability and wide applicability.

The invention provides a new type Doppler probe. The new type Doppler probe comprises a sleeve and a shell body, a piezoelectrics is arranged in the sleeve, the wave vibrating generating face of the piezoelectrics is attached to the shell bottom face of the shell body, a film body is clamped between the wave vibrating generating face of the piezoelectrics and the shell bottom face, threaded sections are correspondingly arranged on the peripheral wall of the sleeve and the inner wall of the shell body; and an annular protruding block is arranged on the outer wall of the rear end of the sleeve in the screw-in direction, and an annular groove is formed in the inner wall of the front end of the shell body in the screw-in direction. After the annular protruding block crosses the groove wall of the annular groove through applied force, the annular protruding block is located in a groove cavity of the annular groove to limit the position of the axial direction of the shell body; while dismounting, excessive external force is applied to enable the annular groove in the shell body to be deformed in the radial direction, so that the annular protruding block crosses the groove wall of the annular groove, continuous convoluting is conducted to finish dismounting, the sleeve and the shell body are matched firmly and reliably, the structure is simple, and the new type Doppler probe can be mounted and dismounted quickly by an operator.

The invention provides a blood flow detector and a detection system. The blood flow detector comprises a photoelectric probe, a Doppler probe, a processor and a displayer. The photoelectric probe, the Doppler probe and the displayer are connected with the processor. By detecting the blood oxygen saturation degree, blood flow speed and other objective indexes of the flap, whether or not a pedicle division operation can be conducted is judged. Compared with the prior art, the judgment accuracy is very high. Besides, whether the pedicle division operation is conducted or not is judged according to the two indexes, namely the blood oxygen saturation degree and the blood flow speed, and the judgment accuracy is further improved.

The embodiment of the invention provides channel flow measurement equipment. According to the channel flow measurement equipment, a Doppler method is adopted to measure flow rate, a Doppler signal processor is used for analyzing and calculating Doppler signals transmitted by an ultrasonic probe to obtain a flow rate; the flow rate is sent to the microcontroller, and the microcontroller calculatesthe instantaneous flow rate, so that the calculation process of the instantaneous flow rate is divided and sent to the Doppler signal processor and the microcontroller for calculation, the calculationperiod of the instantaneous flow rate is shortened, and the flow rate calculation in each calculation period is more accurate. Furthermore, a plurality of Doppler probe pairs are adopted, and the Doppler probe pairs are installed at different heights in a water measuring tank; arrangement of the Doppler probe pairs at different heights is capable of realizing measurement of the fluid rate distribution rules in the vertical direction, and the calculated instantaneous flow is more accurate.

The invention discloses a honeycomb-shaped multi-probe ultrasonic Doppler fetal heart rate monitoring probe system capable of being operated by a pregnant woman herself. The system comprises a centralprobe (D) and two or more branch probes (A) connected with the central probe (D). The central probe (D) and the branch probes (A) all can detect fetal heart signals. The fetal heart rate is capturedthrough a honeycomb-shaped Doppler probe group, and the problem that the fetal heart is difficult to find by means of a single probe is solved.

The invention discloses a Doppler velocimeter for lead fish. The Doppler velocimeter comprises a signal acquisition module, a signal processing module, a lithium battery and a single-chip microcomputer, wherein the signal acquisition module comprises a Doppler probe and a lead fish signal acquisition module, the Doppler probe is arranged at the front end of the lead fish, and the signal processingmodule is fixed at the back end or in the middle of the lead fish; the single-chip microcomputer acquires a lead fish signal from the lead fish signal acquisition module and transmits the lead fish signal to the signal processing module; the signal processing module is connected with the Doppler probe and receives a flow velocity signal sent by the Doppler probe; and the signal processing moduleprocesses the received lead fish signal and flow velocity signal and then transmits the signals to a hydrologic cableway flow measuring system under the control of the single-chip microcomputer. The Doppler velocimeter detects the flow velocity with the Doppler probe by an ultrasonic technology, and is wide in measurement range and high in measured data accuracy.