12 results about "Free flap" patented technology

The invention provides an intelligent decision-making method and system for free flap riser anastomosis based on hemodynamics. According to the method, firstly, the blood flow direction, the flow speed and the blood vessel wall tension parameter of a target blood vessel are collected, and a dynamic correlation model of intravascular fluid mechanics and external tissue deformation is established; a three-dimensional blood flow pressure gradient map is generated based on the model, then, a system automatically screens an anastomosis path meeting a blood flow resistance threshold value and the endothelial cell survival rate requirement, and the optimal anastomosis pose is determined by analyzing the blood vessel wall elasticity matching degree and the turbulence generation probability. Then, guiding the accurate adjustment of the clamping direction of the blood vessel and the suture needle pitch in the operation, ensuring that the pressure of the lumen of the anastomosed blood vessel is kept balanced when the anastomosed blood vessel is axially stretched, meanwhile, effectively inhibiting local vortex, and remarkably improving the long-term smoothness of the anastomosis of the blood vessel. According to the method, mechanical precise matching and blood flow stable control of free flap vascular anastomosis are achieved, and the postoperative risk is remarkably reduced.

The application discloses a kind of free skin flap postoperative nursing scheme evaluation and early warning method based on multi-modal monitoring data fusion, it is related to intelligent medical care technical field, for solving the problem that existing monitoring cannot distinguish vascular pathological crisis and nursing environment interference.First, a multi-dimensional time-varying state matrix containing physiological drive and nursing environment characteristics is constructed, realizing the time sequence alignment of heterogeneous data;Subsequently, the pressure-flow conduction characteristics are analyzed, and the blood flow conduction efficiency index reflecting the inherent patency of blood vessels is extracted;At the same time, a physical gain mapping is established based on nursing parameters, and the theoretical target perfusion trajectory under the current nursing state is deduced;Finally, the dynamic residual vector is calculated and combined with the conduction efficiency index for joint determination, accurately identifying vascular structural occlusion and functional inhibition of nursing program, achieving accurate tracing of postoperative crisis and dynamic evaluation of nursing program.

This invention relates to the field of medical device technology, and more particularly to an intelligent probe patch for monitoring blood circulation in microscopic free flaps, comprising: a disposable probe patch configured to be attached to the surface or edge of the free flap; a biocompatible adhesive layer is provided on the bottom surface of the flexible base of the disposable probe patch, and an auxiliary structure is provided on the top of the flexible base to resist postoperative tissue activity or secretions; the disposable probe patch integrates an optical sensing unit and a temperature sensing unit for collecting local blood oxygen saturation, pulse rate, and surface temperature of the flap, respectively; a repeater, establishing non-contact near-field coupling with the disposable probe patch, the repeater being configured to provide working power to the disposable probe patch through near-field coupling, enabling it to operate without a built-in battery; and synchronously receiving physiological parameter data reflecting the local microcirculation status of the flap collected by the disposable probe patch; and a terminal device, wirelessly connected to the repeater, receiving and processing the physiological parameter data.

The application discloses a kind of local tissue oxygen saturation detection systems for postoperative free flap, including front-end flexible detection module and rear-end signal processing module;Front-end flexible detection module includes the flexible packaging layer of flexible material and the interface layer of being arranged on packaging layer, the material of interface layer is hydrogel mixture, and the detection circuit for being encapsulated in packaging layer is used to detect the blood oxygen saturation of human tissue;Rear-end signal processing module is connected with the front-end flexible detection module, and the rear-end signal processing module processes the signal detected by the front-end flexible detection module, and the local tissue oxygen saturation information is obtained by calculating detection signal.This application is all designed with flexibility, avoids the mechanical damage of detection part to measurement site, so that the sensing part can better adhere to the surface of human skin, improve the accuracy of measurement and the comfort of patient.

The application discloses a kind of free skin flap postoperative nursing scheme evaluation and early warning method based on multi-modal monitoring data fusion, it is related to intelligent medical care technical field, for solving the problem that existing monitoring cannot distinguish vascular pathological crisis and nursing environment interference.First, a multi-dimensional time-varying state matrix containing physiological drive and nursing environment characteristics is constructed, realizing the time sequence alignment of heterogeneous data;Subsequently, the pressure-flow conduction characteristics are analyzed, and the blood flow conduction efficiency index reflecting the inherent patency of blood vessels is extracted;At the same time, a physical gain mapping is established based on nursing parameters, and the theoretical target perfusion trajectory under the current nursing state is deduced;Finally, the dynamic residual vector is calculated and combined with the conduction efficiency index for joint determination, accurately identifying vascular structural occlusion and functional inhibition of nursing program, achieving accurate tracing of postoperative crisis and dynamic evaluation of nursing program.

The application discloses a non-negative pressure drainage device, which comprises a preformed water-permeable soft pad with a waterproof material coated on a bottom surface and a drainage tube inserted into the water-permeable soft pad; the top surface of the water-permeable soft pad is a flat surface, and the bottom surface has a downward protruding structure; the drainage tube is inserted into the protruding structure, and a drainage groove is arranged on the pipe wall of the pipe section part of the drainage tube located in the water-permeable soft pad. The application is particularly suitable for microvascular / neural anastomosis in the vascularization / neuralization of free skin flap transplantation of head and neck tumor and deformity surgery.

The present application relates to the technical field of medical information processing, in particular to a kind of free flap grafting wound injury ultrasound evaluation method, comprising: the ultrasound gray scale image obtained is carried out block processing to obtain each enhanced analysis candidate block, block processing helps to improve the contrast of fat area and edema area;By fat feature screening parameter screening obtains several enhanced analysis target blocks, to a certain extent reduce image data analysis amount, improve the efficiency of wound injury ultrasound evaluation;Blood vessel ultrasound frequency shift characteristic value and fat echo factor are combined to determine the fat feature first evaluation value of enhanced analysis target block, and then determine the fat feature second evaluation value of each gray level, which helps to realize the enhancement of fat area differentiation under the condition that probe and wound skin contact is not good, and obtain enhanced ultrasound gray scale image for wound injury ultrasound evaluation with better enhancement effect.

The invention relates to the technical field of medical instruments, in particular to a flap vascular crisis emergency treatment device, and aims to solve the problems that an existing flap vascular crisis treatment device cannot implement detection and cannot intervene in time. The flap vascular crisis emergency treatment device comprises a fixing frame placed on the outer side of a free flap; the device further comprises an anticoagulant drug release device and a vascular anastomosis device. The anticoagulant drug release device is detachably connected to the fixed frame; the vascular anastomosis device is movably arranged on the fixing frame. The anticoagulant drug release device comprises a drug storage barrel, a puncture needle and a drug delivery assembly; the puncture needle is connected to the bottom end of the medicine storage barrel; the medicine feeding assembly slides and penetrates through the medicine storage barrel. A vascular anastomosis device includes a vascular ferrule and a plurality of suture assemblies. According to the flap blood vessel crisis emergency treatment device, the blood flow condition of the flap blood vessel can be monitored in real time through the anticoagulant drug release device, and the multiple suture assemblies can be controlled to work at the same time by operating the adjusting part.

This invention discloses a method and device for monitoring blood supply after flap transfer, belonging to the field of postoperative nursing observation. The method includes: acquiring multiple first temperature values ​​corresponding to multiple first points in a first region of the free flap transferred to the recipient area, and calculating the average first temperature T1; acquiring multiple second temperature values ​​corresponding to multiple second points in a second region of the free flap transferred to the recipient area, and calculating the average second temperature T2; acquiring multiple third temperature values ​​corresponding to multiple third points in a normal skin region near the free flap transferred to the recipient area, and calculating the average third temperature T3; and executing a preset alarm prompting strategy based on the relationship between the average first temperature T1, the average second temperature T2, and the average third temperature T3. This invention can improve the consistency of assessing the postoperative flap blood supply status and also improve the sensitivity of identifying blood supply disorders.

The embodiment of the invention discloses a mammary gland flap dissociation device. The mammary gland flap dissociation device comprises a fixing rod, a handle, a first positioning adjusting mechanism, a pressing piece, a second positioning adjusting mechanism and a scalpel blade. Wherein the handle is connected to the fixing rod. The first positioning adjusting mechanism is arranged on the fixing rod. And the pressing sheet is arranged on the first positioning adjusting mechanism. And a positioning structure is arranged on the pressing sheet. And the second positioning adjusting mechanism is arranged on the fixing rod. And the scalpel blade is mounted on the second positioning and adjusting mechanism. In addition, the scalpel blade is located below the same side of the pressing piece. According to the mammary gland flap dissociation device, the thickness of the dissociated flap can be determined according to the actual situation, heat damage is avoided, the length of the scalpel can be adjusted, and the range of the flap needing to be dissociated can be reached.

The application discloses an intelligent free skin flap vascular crisis monitor, and belongs to the technical field of medical devices.The monitor comprises a signal emission and reception module, which is provided with a red light and infrared light emitter, a reflected light receiver and a multi-modal sensor, and adopts a flexible medical silica gel outer layer with negative pressure adsorption and a built-in micro pressure sensor; a signal sampling and amplification circuit module, which is used for high sampling rate acquisition and two-stage signal amplification; an MCU signal processing module, which is internally provided with a deep learning algorithm, and is used for filtering interference, calculating blood oxygen and comprehensive perfusion index FPI, and identifying crisis types; and a result output module, which is used for displaying data and alarming.The application realizes the advantages of high precision, fast response, small size, portability, intraoperative and bedside use, and compatibility with an electrocardiograph monitor through multi-modal fusion monitoring, self-adaptive fitting and signal compensation, intelligent crisis identification and other technologies, effectively reduces medical costs, and improves the success rate of skin flap transplantation surgery.

The utility model discloses a handheld portable free flap blood supply detector, and relates to the technical field of medical equipment. The detector main body is used for detecting the assembling and fixing work of the whole part; the system further comprises; the detection mechanism is mounted in the detector main body and is used for detecting flap blood supply; one end of the bottom of the handle is welded with the outer wall of the detector main body; the telescopic rod is mounted in the detector main body; when the detector is used for blood supply detection, the open end of the bottom of the detector body is attached to the surface of a free flap, the button can drive the buckle to move downwards while being pressed, then one end of the bottom of the buckle can be clamped with the clamping groove in the outer wall of the detector body, and then the needle body can puncture the flap to observe the blood supply condition; after blood supply observation, the button is loosened, and the buckle and the clamping groove are clamped, so that the needle body cannot automatically contract towards the interior of the detector, and the interior of the detector main body is prevented from being polluted by blood stains on the surface of the needle body.