132 results about "Fetal head" patented technology

An inflatable system, of between one and three balloons, for cervical dilation and labor induction is provided. The inflatable system may have a uterine balloon, for positioning at a proximal portion of the uterus, with respect to an operator, adjacent to the cervical internal os, the uterine balloon being shaped so as to maximize the pressure against the decidua and the internal cervical os and so as to minimize the pressure on the fetal head. Additionally or alternatively, the inflatable system may have a vaginal balloon, for positioning in the vagina, for applying pressure on the external cervical os. Additionally or alternatively, the inflatable system may have a cervical balloon, for positioning in the cervical canal, the cervical balloon being shaped so as to maximize the contact area with the cervix. The balloons are operative to stimulate the secretion of hormone, by exerting pressure on the proximal decidual surfaces of the uterus and on the cervix, so as to soften and ripen the cervix, cause the cervix to dilate, and induce labor. The balloons, which may have rough external surfaces, in order to keep them anchored in place, may be inflated by the operator, directly after their insertion, or manually and gradually, by the woman herself. Various sensors and other instruments may be used with the inflatable system, to monitor cervical dilation, fetal well-being, and the woman's conditions.

A hand-held 3D ultrasound instrument is disclosed which is used to non-invasively and automatically measure amniotic fluid volume in the uterus requiring a minimum of operator intervention. Using a 2D image-processing algorithm, the instrument gives automatic feedback to the user about where to acquire the 3D image set. The user acquires one or more 3D data sets covering all of the amniotic fluid in the uterus and this data is then processed using an optimized 3D algorithm to output the total amniotic fluid volume corrected for any fetal head brain volume contributions.

A hand-held 3D ultrasound instrument is disclosed which is used to non-invasively and automatically measure amniotic fluid volume in the uterus requiring a minimum of operator intervention. Using a 2D image-processing algorithm, the instrument gives automatic feedback to the user about where to acquire the 3D image set. The user acquires one or more 3D data sets covering all of the amniotic fluid in the uterus and this data is then processed using an optimized 3D algorithm to output the total amniotic fluid volume corrected for any fetal head brain volume contributions.

A hand-held 3D ultrasound instrument is disclosed which is used to non-invasively and automatically measure amniotic fluid volume in the uterus requiring a minimum of operator intervention. Using a 2D image-processing algorithm, the instrument gives automatic feedback to the user about where to acquire the 3D image set. The user acquires one or more 3D data sets covering all of the amniotic fluid in the uterus and this data is then processed using an optimized 3D algorithm to output the total amniotic fluid volume corrected for any fetal head brain volume contributions.

A three-dimensional ultrasonic imaging method and a three-dimensional ultrasonic imaging system. The method comprises: transmitting an ultrasonic wave to a fetal head; receiving an ultrasonic echo, obtaining an ultrasonic echo signal, and obtaining the three-dimensional volume data of the fetal head according to the ultrasonic echo signal; according to the characteristics of a median sagittal section of the fetal head, detecting the median sagittal section in the three-dimensional volume data; and displaying the median sagittal section. The ultrasonic imaging method and the ultrasonic imaging system can obtain the three-dimensional volume data of the fetal head by ultrasonically scanning the fetus and can also automatically detect and display the median sagittal section of the fetal head, thus solving the problem that it is difficult for a doctor to precisely and manually position the median sagittal section.

The invention relates to the technical field of image processing, in particular to a fetus head full-automatic segmentation method based on three-dimensional ultrasound, which comprises the followingsteps of firstly, carrying out data enhancement on a three-dimensional ultrasound volume data set of a fetus head to obtain an enhanced data set; inputting the enhanced data set into a full convolutional neural network, and training a model in an end-to-end volume mapping manner to realize pre-segmentation of the data set; and finally, carrying out iterative optimization processing on a pre-segmentation result by adopting a cascade full convolutional neural network based on an automatic context to obtain a final segmentation result. The invention aims to overcome a plurality of defects in fetal head measurement by the existing two-dimensional ultrasound, so that the subsequent diagnosis efficiency of doctors is improved, and more other prenatal studies are promoted.

The invention discloses a method for fetal head orientation measurement based on electromagnetic positioning and ultrasonic imaging. The method comprises four measurement modes for fetus orbits, fetus cervical vertebra, fetus brain middle line and fetus biparietal diameter. The method comprises the steps that (1) an electromagnetic positioning system is used to measure coordinates of symphysis pubis upper-lower edges and a fifth lumbar vertebra spinous process of a pregnant woman; (2) a normal vector of a sagittal face is computed; (3) an integrated probe is used for transverse scanning of the pregnant woman's abdominal cavity, an ultrasonic image of anatomy characteristic points of the fetal head is acquired, and the measurement mode is determined on the basis; (4) direction vectors under different measurement modes are computed; (5) included angles between the direction vectors and the sagittal face normal vector are computed; and (6) the fetal head orientation is determined according to the included angles. The method disclosed by the invention has the advantages that the fetal head orientation can be measured conveniently, rapidly and accurately, etc.

The invention discloses an electronic partogram system and a parameter calculating method based on a magnetic field tracing and positioning technology. The electronic partogram system comprises a magnetic field tracing and positioning module, an ultrasonic image module, a fetal heart rate and uterus shrink pressure module and an electronic partogram workstation. The magnetic field tracing and positioning module comprises a magnetic field generation device for generating a magnetic field and a magnetic induction sensor. According to the invention, through monitoring parameters such as a fetal head position, a fetal head direction, cervical dilatation, a fetal heart rate, uterus shrink pressure in a delivery process, an electronic partogram can be full-automatically or semi-automatically generated on a measuring time point, so that a doctor can dynamically monitor the delivery process through the electronic partogram. Simultaneously, due to the utilization of a full-automatic parameter calculating operation mode and a semi-automatic parameter calculating operation mode, through monitoring fetal head parameters and pelvis parameters, pelvic disproportion can be forecasted on the measuring time point; and through monitoring the fetal heart rate and the uterus shrink pressure of a mother/ a fetus, multi-parameter monitoring is realized.

A device for assisting childbirth, preferably made of separate sheets of loosely knitted polypropylene loops. Each sheet has a control end, an opposite mouth end, and a pair of insertion arms attached to the edges of the sheets. The insertion arms of each sheet slidingly engage one another. Thus, one sheet may be inserted between the fetal head and the birth canal wall until it is properly placed about the fetal head. The second sheet can then engage the first sheet, sliding into position around the fetal head as well, thereby forming an elongated gripping member completely encircling the fetal head. A drawstring may be provided to assist in initiating traction. Thereafter, pulling on the gripping member will cause the loops to lengthen longitudinally and compress in their transverse dimension, causing the circumference of the gripping member to decrease and thereby grip the fetal head.

An obstetric apparatus and method for repositioning a fetal head within the birth canal of a woman in labor. A user, typically an obstetrician, surgeon or similarly trained medical personnel, can efficiently and safely engage a fetal head that is wedged in the parturient woman's pelvis and lift it up in the birth canal towards the uterus, for safe delivery of the baby via C-section. The apparatus comprises an elongated and substantially rigid shaft, a pivoting neck and a soft engaging portion that includes a flexible outer cup and an inflatable inner cup for engaging the fetal head. The inventive apparatus and method can provide a mechanical advantage for repositioning the head of the fetus, and can provide assistance for C-section delivery in order to minimize maternal and neonatal complications.

The invention discloses a trainer for simulating operation of obstetric forceps. The trainer is characterized in that external force acts against a fetal head through the obstetric forceps; position and attitude parameters of the obstetric forceps and the fetal head are transmitted to a computer through a three-dimensional space track locator; clamping force from the obstetric forceps and traction force which are exerted to the fetal head are transmitted to a lower computer system through a clamping force sensor and a traction force sensor respectively; data is sent to the computer by the lower computer system; position and attitude of each 3D (three-dimensional) model in a three-dimensional scene is updated by a software system which runs over a high-performance computer platform according to the collected position and attitude data, and actual operation acts in a three-dimensional scene to realize synchronous representation in real time; a fetal head motion control command is generated by the system according to stress data, and the command is sent to the lower computer system; and a fetal head drive device is controlled by the lower computer system to drive the fetal head to move.

The invention discloses a fetal head aspirator, and mainly relates to the field of obstetric apparatuses. The fetal head aspirator comprises a metal conical cylinder, the wide end of the conical cylinder is provided with multiple steel wire keels in arc fixed shapes, the inner sides of the top ends of the steel wire keels are provided with silica gel beads connected with the steel wire keels in a rolling mode, the outer sides of the steel wire keels are covered with negative pressure covers, the top sides of the negative pressure covers are provided with sealing edges, the top sides of the sealing edges bend inward, the negative pressure covers and the sealing edges are silica gel film which is formed integrally, the narrow end of the conical cylinder is provided with a connecting cylinder, the inner wall of the connecting cylinder is provided with an inner valve cavity provided with a one-way air valve, the outer wall of the connecting cylinder is provided with an air pumping nozzle used for pumping air and introducing air, and the air pumping nozzle is communicated with the inner valve cavity. The fetal head aspirator has the advantages of remarkably lowering the size of arching of afterbirth, remarkably solving the problems of fetal head scalp blister, bruises, lacerations, hematoma under the skin and under the periosteum, intracranial hemorrhage and the like, effectively assisting in delivery and childbirth, and protecting the health of fetuses.

An obstetrical instrument includes an elongated handle and a fetal head support portion coupled with a distal end of the elongated handle.

The invention discloses an ultrasonic probe calibration method and calibration device based on an electromagnetic positioning technology. The ultrasonic probe calibration method includes the followingsteps: 1) performing ultrasonic image acquisition, 2) performing ultrasonic image preprocessing, and adopting an adaptive threshold method to automatically identify and sort ultrasonic image markingpoints; and 3) solving a calibration matrix, namely a coordinate conversion matrix between an ultrasonic image coordinate system and an electromagnetic positioning sensor coordinate system. The ultrasonic probe calibration device includes an electromagnetic positioning system, a B-ultrasonic device, an internal cuboid water tank, an external cuboid water tank, ultrasonic sound-absorbing cotton, aseven-layer double N-type nylon thread and an ultrasonic probe fixing bracket. In the calibration method, the electromagnetic positioning technology and a B-ultrasonic image are combined, the calculation process is fully automatic, and the method can adapt to different types of ultrasonic probes. The device is simple and convenient and is applied to the field of obstetrical delivery monitoring, and accurate measurement and 3D visualization of the position of the fetal head and the orientation of the fetal head can be achieved.

A catheter device for facilitating release of a structure lodged within a body cavity includes a flexible catheter and carrier configured to mount the catheter to a finger. The catheter includes a leading end having an opening configured to permit fluids within the catheter to exit the catheter, and a proximal end configured to connect to a fluid source. A method using the catheter device to release a fetal head from a maternal pelvis during cesarean delivery of the fetus is provided.

The invention provides a method for measuring a fetal corpus callosum volume by using magnetic resonance imaging, and a magnetic resonance imaging apparatus. The method comprises the following steps:acquiring a positioning image of a to-be-detected fetus through magnetic resonance imaging; determining a detection area P according to the position of fetal corpus callosum in the positioning image,wherein the detection area P comprises the fetal corpus callosum; carrying out magnetic resonance scanning on the detection area to obtain a diffusion weighted image of the detection area, wherein a gradient direction during the magnetic resonance scanning only needs to be applied to a direction parallel to the extension direction of the fiber bundles of the corpus callosum; intercepting a fetal head image in the diffusion weighted image; applying a preset threshold to the fetal head image to obtain high signals with brightness greater than a threshold in the image; and carrying out bunching processing on the high signals, taking the maximum bunch in the high signals as corpus callosum, calculating the sum of the sizes of voxels related to the high signal of the maximum bunch, and taking the sum as the volume of the corpus callosum.

The invention consists of an axis-traction handle with a pull-sensing grip (4) for the obstetrical forceps, whose object is to reduce the risk of injury to the fetus, caused by excessive traction force during a forceps delivery. The grip contains electronic hardware which include a strain gauge to measure the pull exerted on the axis-traction handle, and thus on the fetal head, during a forceps delivery, a sounder to alert the doctor when the pull exceeds preset safety limits, and a transceiver for the wireless transmission of the pull data to a receiver connected to a lap-top computer with specific software, which generates a graphic representation of such data.

The invention provides a method and device for measuring a fetal head circumference in an ultrasound image. The method comprises the steps that the position of a longest edge line in the ultrasound image is obtained, and a specified area is searched for according to the position; whether or not the designated area is successfully searched for is judged; if yes, search results are combined in a specified manner to obtain a fetal head circumference area, and the fetal head circumference is calculated according to the fetal head circumference area. The method and device for measuring the fetal head circumference in the ultrasound image have the advantages that the situation can be avoided that the whole image area is searched for by sliding a window when fetal head position is automatically positioned by taking the position of the longest edge line as a search starting position, thereby improving the search efficiency, and positioning of the head circumference area can be performed through a second area identification method when searching for the head circumference area fails, thereby avoiding manual operation and facilitating diagnosis by a clinician.