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.

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.

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 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.

An ultrasonic Doppler probe (10) is provided for use in connection with non-invasive Doppler imaging of fluid flow within the human body. The Doppler probe (10) 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 (10) of thepresent invention employs piezo-electric materials for the formation of acoustic transmitting (14) and receiving (16) transducers (12) that are positioned within the probe (10) to allow the probe (10) to be selectively operated at a number of different frequencies spanning no more than one octave in frequency range.

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.

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 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.

A heterodyne laser having a first optical path for guiding excitation light and a second optical path for guiding measurement light. The heterodyne laser includes an optical probe body for optically coupling and structurally combining the first optical path and the second optical path, and includes a reflection mirror, a beam splitter, a focal lens and a ¼ wavelength plate. The excitation light from the first optical path is introduced through the reflection mirror, the beam splitter and the focal lens into a measurement object.

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 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.