19 results about "Arterial vessel" patented technology

The utility model relates to a large area contact type thread type degradable magnesium alloy aortic blood vessel anastomat, including the conical inner ring, conical outer ring and sleeve outer ring that set gradually from inside to outside, be provided with blood vessel clamping space between the conical inner ring and conical outer ring, it is the thread cooperation between conical outer ring and sleeve outer ring, adjust the size of blood vessel clamping space through the rotation sleeve outer ring, sleeve outer ring. The utility model simple structure, reasonable in design, convenient to use, adjust the size of blood vessel clamping space through the rotation conical outer ring and sleeve outer ring to fixed blood vessel, realize blood vessel anastomosis fast, avoid the mode of the traditional everted type through end face combination simultaneously, greatly increase the contact area between blood vessel and prevent the occurrence of blood leakage.

Systems and methods are provided for reducing the reliance on operator skill during vascular ultrasound procedures. The placement of an ultrasound probe to assess perfusion associated with a wound may be facilitated by receiving input suitable for identifying an anatomical region associated with the wound and providing an indication of a suitable initial probe position, and optionally, probe orientation, for acoustically interrogating a target arterial vessel known to provide perfusion to the anatomical region associated with the wound. Regions exhibiting arterial flow may be detected as the probe is moved, enabling arterial vessel detection and localization. A subregion within the detected arterial vessel and a beam steering angle may be autonomously determined for spectral Doppler data collection, enabling the measurement of hemodynamic measures associated with the arterial vessel. Example apparatus for securing the probe to the patient and facilitating probe positioning to search for a target vessel are disclosed.

The application provides a method and device for recommending a hepatic cancer embolism placement point planning, wherein the method comprises the following steps: obtaining input data; segmenting the input data to obtain a segmentation result of the input data, and classifying the segmentation result to determine whether there is a high-risk tumor in the liver; if there is a high-risk tumor in the liver, calculating an embolism placement point according to the segmentation result, generating an embolism placement point planning result; synthesizing the embolism placement point planning result with an original medical image to generate a recommended scheme, and outputting the recommended scheme. Through deep learning, machine learning and traditional image processing methods, various organs such as patient arterial vessels, livers, tumors and bones are automatically segmented, and according to the automatically generated segmentation information, recommended information is generated to recommend the embolism placement point of each tumor, so as to assist doctors in comprehensively and deeply understanding the condition of the patient.

This invention discloses a simulated upper arm artery blood pressure ultrasound phantom device and a method for verifying ultrasound blood pressure measurement technology. The device includes: simulated blood circulating through tubing via a peristaltic pump from a buffer tank, a flow meter, the simulated upper arm artery blood pressure ultrasound phantom, to a reservoir. The peristaltic pump and buffer tank work together to achieve constant flow and pulsating modes. An airbag pressurizer is connected to the upper air chamber of the reservoir to pressurize the tubing, providing a base pressure simulating the human mean arterial pressure. The pulsating mode of the peristaltic pump simulates the pulsating pressure changes within the systolic and diastolic pressure ranges of human blood pressure, and these changes are displayed and recorded in real time via a pressure transmitter and a connected digital oscilloscope. The simulated upper arm artery blood pressure ultrasound phantom allows the internally implanted simulated arteries to radially expand and contract with pressure pulsation, simulating the dynamic behavior of the human upper arm artery, thus verifying the ultrasound blood pressure measurement technology.

This invention discloses a portable hemodialysis accessory with a blood leakage sensor, relating to the field of hemodialysis monitoring technology. The invention includes a housing, with a venous vessel fixation seat and an arterial vessel fixation seat connected to its two sides respectively. Each of the venous and arterial vessel fixation seats has a vessel slot on one side. A monitoring system connected to the leakage sensor is disposed within the housing, and a control panel and an audible and visual alarm are disposed on the outside of the housing and connected to the monitoring system. This invention, through the monitoring system within the housing, can receive the detection signal transmitted by the leakage sensor in real time. When blood leaks into the vessel slot and comes into contact with the leakage sensor, the monitoring system quickly analyzes and processes the signal, immediately triggering an alarm light on the control panel and activating the audible and visual alarm. This dual audio and visual alert allows medical personnel to detect the abnormality immediately.

Described are methods and systems for transcervical access of the cerebral arterial vasculature and treatment of cerebral occlusions, including ischemic stroke. The methods and devices may include methods and devices which may provide aspiration and passive flow reversal, those which protect the cerebral penumbra during the procedure to minimize injury to brain, as well as distal catheters and devices to remove an occlusion. The methods and devices that provide passive flow reversal may also offer to the user a degree of flow control. Devices and methods which provide a way to securely close the access site in the carotid artery to avoid the potentially devastating consequences of a transcervical hematoma are also described.

A method for coronary road mapping may include receiving a current image associated with a medical scan, determining an image that matches the current image from a sequence of images for which respective blood vessel maps have been determined, and overlaying the current image with the blood vessel map associated with the matching image. The sequence of images may be captured when a contrast agent was present, and the matching image may be identified in response to determining that the physiological phase (e.g., cardiac cycle) and / or view depicted by the image match those depicted by the current image. Motion compensation may be performed as part of the blood vessel overlay, which may enable better visualization of blood vessels and medical device(s) (e.g., a catheter) placed in the blood vessels even when the contrast agent is worn out.

A distal entry point (DEP) to brain aspiration (D2BA) catheter for use in an endovascular procedure for gaining access to cervical and cerebral arteries in a brain of a patient and aspirating one or more intracranial clots from the cerebral arteries, comprising a soft distal tip region having a distal length sufficient to extend from a level 1 or level 2 arterial segment of a cerebral artery or equivalent to an upper neck arterial vessel, a stiffness enabling movement through the level 1 or level 2 arterial segment of the cerebral artery, and an outside diameter (OD) of 6F-10F, a proximal region having a stiffness greater than the stiffness of the soft distal tip region, the proximal region having a length sufficient to extend to outside the patient through the DEP.

This invention relates to the field of medical device technology, and more particularly to a hemostasis device after cardiac interventional procedures. The device includes a base plate, a restraint strap disposed on the base plate for securing the base plate to the patient's limb at the puncture site, a compression mechanism disposed on the base plate for compressing the tissue at the puncture site, an arterial compression mechanism for compressing the arterial puncture point, and a skin compression mechanism for compressing the epidermal puncture point. This solution uses the arterial compression mechanism and the skin compression mechanism to independently compress the arterial puncture point and the epidermal puncture point, respectively. This results in greater pressure on the artery at the arterial puncture point and the epidermal puncture point than at other locations, increasing the degree of arterial contraction at the arterial puncture point, accelerating the closure of the arterial blood vessel at the arterial puncture point, and effectively improving the hemostasis effect.

This application provides an image processing method, apparatus, storage medium, and electronic device, relating to the field of fundus image processing technology. The image processing method provided in this application includes: determining each fundus blood vessel contained in a target fundus image; determining pre-intersection points of each fundus blood vessel; removing two-dimensional intersection points of arteries and veins from the pre-intersection points to obtain fundus blood vessel intersection points; for each fundus blood vessel intersection point, determining the vessel angle corresponding to the intersection point based on the intersection point and the corresponding fundus blood vessel; and determining the vessel angle of the target fundus image based on the vessel angles corresponding to each fundus blood vessel intersection point contained in the target fundus image. The image processing method provided in this application can automatically calculate the vessel angle of a target fundus image, and the calculation results are objective, improving the accuracy and efficiency of the vessel angle calculation results.

This invention discloses a permanent implantable arterial blood pressure monitoring system, comprising an in vivo implantation unit and an external monitoring unit. The in vivo implantation unit includes a pressure sensing head, a subcutaneous implantation module, and a hydraulic pressure transmission catheter. The pressure sensing head is implanted into the lumen of a target artery, and its outer surface is covered with an anticoagulant biological coating. The subcutaneous implantation module is implanted into the subcutaneous tissue adjacent to the target artery and includes a sealed shell, an energy conversion device, a miniature pressure sensor, a signal processing and transmission circuit, and a wireless transmission module. The hydraulic pressure transmission catheter is sealed at both ends to the pressure interfaces on the pressure sensing head and the subcutaneous implantation module shell, respectively. Its lumen is filled with incompressible fluid for transmitting blood pressure fluctuations to the miniature pressure sensor. This invention solves the problem that existing technologies cannot achieve continuous and accurate blood pressure monitoring while ensuring long-term safety by physically separating pressure sensing and signal conversion, thus combining accuracy and long-term implantation safety.

Provided in the embodiments of the present disclosure are an artery localization and detection method and apparatus, an electronic device, and a storage medium. The method comprises, during the process of continuously moving an image collection apparatus at a target part, iteratively executing at least one round of the following steps until the degree of integrity meets a preset condition: obtaining an image sequence collected by means of the image collection apparatus in the current round, stacking the image sequence into a pair of stacked images, and inputting the stacked images into a localization network, so as to obtain an image state output by means of the localization network; and using, as a target image, the last image frame in the image sequence obtained when the degree of integrity meets the preset condition, detecting an arterial blood vessel in the target image, and determining a detection result indicative of a health risk of the arterial blood vessel. In this way, when a user moves a image collection apparatus, an image can be recognized to assist the user in locating an arterial blood vessel, and the arterial blood vessel is detected when the degree of integrity meets a preset condition.

This invention discloses a systemic circulation venous simulation system, comprising a right ventricular simulation component, an arterial compliance simulation component, a venous vessel module, a damping module, a throttling valve, a collapsible venous segment, a venous compliance simulation component, a right atrial simulation component, a drive module, and a data acquisition module. The right ventricular simulation component simulates the pumping function of the right ventricle; the arterial compliance simulation component simulates the elastic energy storage characteristics of the arterial system; the venous vessel module includes a collecting chamber, a superior vena cava return vessel, an inferior vena cava return vessel, and a vena cava confluence conduit; the collapsible venous segment prevents excessive negative pressure in the venous system; the venous compliance simulation component reduces the impact of right atrial pressure fluctuations on the venous vessels; and the right atrial simulation component simulates the right atrial filling state through internal volume changes. This simulation system can be used for in vitro testing of vena cava intervention devices.

The present application belongs to the field of medical devices and physiological signal detection technology, and relates to a pulse wave analysis method and system based on piezoelectric dynamics characteristics. The present application compensates for the attenuation of the subcutaneous tissue on the pulse wave through active acoustic detection, emits high-frequency mechanical vibration waves at the end of diastole using multi-frequency voltage pulses, and receives reflected echoes to construct an equivalent acoustic impedance transfer function and an acoustic inverse compensation filter. The present application restores the true arterial vessel wall dynamics by performing frequency domain deconvolution operation on the original pulse wave signal, locates key physiological event points, estimates the local pulse wave propagation speed using a single-point piezoelectric sensor without the need for multi-point measurement. In combination with the fluid mechanics equation, the present application separates the forward incident wave and the backward reflected wave, calculates the absolute amplitude ratio to evaluate the vascular compliance, effectively eliminates the interference of subcutaneous fat and muscle tissue, improves the accuracy and reliability of the evaluation, and provides a new tool for cardiovascular function evaluation.

The present application relates to the technical fields of biomedical engineering, in particular to a kind of inner support outer screwing type degradable magnesium alloy aortic blood vessel anastomat and working method, wherein blood vessel anastomat includes outer male ring, outer female ring and inner connecting pipe made of degradable magnesium alloy, the outer wall of the inner connecting pipe is spaced apart and provided with two circles of conical protrusions, and annular recess for accommodating the end head of two broken ends of blood vessel is formed between two circles of conical protrusions;The outer male ring and outer female ring are sleeved on the outside of inner connecting pipe, and the inner wall of outer male ring and outer female ring is respectively provided with one conical surface corresponding to conical protrusion, and the inner wall formed after outer male ring and outer female ring are connected forms blood vessel clamping space for accommodating blood vessel with the outer wall of inner connecting pipe.The blood vessel anastomat uses degradable magnesium alloy as material, can realize quickly, safely complete blood vessel anastomosis, and reduce the damage to blood vessel.

The utility model relates to a kind of erectile aids, including the C-type matrix for being placed in the penis main body downside when using, the length direction of C-type matrix is identical with the length of penis main body reverse, three groups of left side press group, middle press group and right side press group sequentially arranged along the inside of C-type matrix circumferential direction are provided, left side press group is used to press left side penis cavernosum, middle press group is used to press urethral cavernosum, right side press group is used to press right side penis cavernosum, each press group includes respectively can independently act first cavernosum press head, second cavernosum press head and third cavernosum press head sequentially arranged along the blood flow direction of corresponding cavernosum inside arterial vessel, each cavernosum press head is inflated by filling medium inside to press target blood vessel, or cavernosum press head is pressed target blood vessel by up and down translation. The utility model provides a kind of erectile aids, which can distinguish the erectile pressure of urethral cavernosum and penis cavernosum.

The utility model relates to hemodialysis technical field especially, it is a kind of pipeline connecting device of immediate wear type artificial blood vessel, including subcutaneous tissue layer, the skin layer of being in the upper layer of subcutaneous tissue layer, the venous blood vessel and arterial blood vessel being arranged between subcutaneous tissue layer and skin layer and the artificial blood vessel being established between venous blood vessel and arterial blood vessel. In the utility model, the original artificial blood vessel structure is improved scientifically and rationally, venous transfusion port, arterial transfusion port, oval puncture bevel and rubber septum are arranged on artificial blood vessel, artificial blood vessel can be embedded between subcutaneous tissue layer and skin layer, and skin puncture hill, which is convenient for puncture needle to puncture and position, can be formed on skin layer, effectively reduce the risk problems such as surgical trauma, puncture risk, catheter infection, central vein stenosis and even occlusion of hemodialysis process of hemodialysis patient, thereby improve the security and stability of actual hemodialysis use.

The application discloses a pressure pulse wave sensor, which comprises a first pressure sensing unit and a second pressure sensing unit; the first pressure sensing unit comprises a first pressure sensing plane, and the second pressure sensing unit comprises a second pressure sensing plane; the first pressure sensing plane and the second pressure sensing plane are located in different planes and cannot be completely overlapped through plane transformation; the two pressure sensing planes simultaneously measure pressure; when the pressure pulse wave data measured by the first pressure sensing plane and the second pressure sensing plane in one pulse cycle is the same, it is indicated that the pressure pulse wave sensor is pressed to the position of an arterial blood vessel, the contact surface of the arterial blood vessel and the first pressure sensing unit is equal to or greater than the first pressure sensing plane, and the contact surface of the arterial blood vessel and the second pressure sensing unit is equal to or greater than the second pressure sensing plane. The pressure pulse wave sensor is provided with two pressure sensing planes in different planes, and detection can be rapidly realized in at least one pulse wave cycle, so that the detection success rate and detection efficiency are improved.