15 results about "Scar tissue" patented technology

In some examples, a tool for, e.g., creating a sub-sternal tunnel in a patient or other use, is described. The tool may include a handle and a tunneling shaft coupled to the handle. The tunneling shaft extends from a proximal end to a distal end, and at least a portion of the tunneling shaft extends in a curved orientation between the first end to the distal end. The distal end of the tunneling shaft includes a cutting tool having a sharp edge. The cutting tool is moveable from a recessed position in which the sharp edge of the cutting tool is recessed into the distal end of the tunneling shaft to a deployed position in which the sharp edge of the cutting tool extends beyond the distal end of the tunneling shaft in the deployed position, e.g., to cut pericardium, scar tissue, and / or connective tissue with the sharp edge.

This invention provides a pH-responsive immunomodulatory microneedle patch, its preparation method, and its application, belonging to the field of biomedical materials technology. This invention incorporates Zif-8 nanoparticles loaded with ChABC into GelMA hydrogel to prepare a pH-responsive immunomodulatory microneedle patch (Z@C-MN). As the patch gradually degrades, the system can continuously release Zn in a pH-responsive manner. 2+ Z@C-MN, along with ChABC, promotes in situ repair of cerebral fibrosis (SCI) after injury. Z@C-MN induces macrophage polarization towards a pro-regenerative phenotype, thereby downregulating the inflammatory response, increasing neurite length, and promoting the differentiation of neural stem cells into neurons. In vivo, Z@C-MN reduced the inflammatory microenvironment after injury and promoted angiogenesis in a rat SCI model. Furthermore, it activated axonal regeneration by inhibiting scar tissue formation and regulating CD4+. + T cell transformation supports neurogenesis.

The present disclosure relates generally to the use of medical instruments for treating chronic venous disease and collagenous scar tissue. In particular, the present disclosure provides methods and systems for remodeling collagen obstructions using energy and expandable catheters.

A portable knee bend exercise apparatus which allows for controlled use of the knee joint for exercise movements so as to reduce or prevent the buildup of scar tissue and to strengthen muscles around the joint. The portable knee bend exercise apparatus includes a wedge body having a support portion suitable to receive the thigh of a user, a lip portion suitable to provide an axis of rotation about which a knee can perform extension and flexion, a tapering portion which allows for full knee flexion, a bottom portion, and a back portion suitable to couple with a seat on which a user in seated. Coupled with the wedge body is a strap member which is structured to both encircle the wedge body and extend above the top surface to selectively form a loop which can secure the leg of a user to the top surface.

Electrical activity is sensed from a plurality of electrodes of a multi-electrode catheter. For each of a plurality of surface locations of cardiac tissue, the processor identifies a first electrical signal originating from a first depth and a second electrical signal originating from a second depth, estimating, for each of the first electrical signals, a first near-field signal originating from the first depth and detecting a scar boundary at the first depth based on the first near-field signal, and estimating, for each of the second electrical signals, a second near-field signal originating from the second depth and detecting a scar boundary at the second depth based on the second near-field signal. Based on the scar boundary detected at the first depth and the second depth, the processor visually displays first and second maps of the heart depicting scar tissue at the first and second depths, respectively.

The present disclosure relates to electroanatomical mapping of cardiac tissue at different depths using a multi-electrode catheter. A multi-electrode catheter within a patient's heart has a plurality of first electrodes on a first side adjacent to heart tissue at a first location and a plurality of second electrodes on a second side facing away from the heart tissue. Electrical activity is received from at least one electrode on the first side and at least one electrode on the second side, and a signal analysis is performed thereon based at least in part on a distance between electrodes on different sides of the multi-electrode catheter. The process is repeated for further locations of heart tissue in the heart and an electroanatomical map of the heart depicting electrical activity or scar tissue is generated based on the signal analysis.

The invention discloses a multifunctional targeting hydrogel based on chiral polypeptide as well as a preparation method and application thereof, and the multifunctional targeting hydrogel based on chiral polypeptide comprises the following raw materials in parts by weight: targeting nanoparticles loaded with a TGF-beta inhibitor, chiral antioxidant polypeptide, a cross-linking agent and water. The multifunctional targeted hydrogel has the functions of MI early-stage efficient ROS removal and MI late-stage targeted fibrosis blocking, has the functions of remodeling the infarction area microenvironment, inhibiting scar tissue expansion and recovering cardiac muscle synchronous electrical conduction, and finally achieves coordination of hydrogel degradation kinetics and the heart repair process and multi-dimensional repair of damaged cardiac muscle.

The invention provides a deep learning-based scalp health condition detection method and system, and relates to the technical field of image data processing, and the method comprises the steps: obtaining dermatoscope images and optical coherence tomography data of different scalp regions; constructing a voxel model with epidermis morphological characteristics and subcutaneous tissue scattering characteristics according to optical coherence tomography data; performing multi-layer convolution and pooling operation on the voxel model by using a pre-trained convolutional neural network to extract a high-dimensional feature vector; mapping the high-dimensional feature vector to a low-dimensional space by using a manifold learning algorithm, and calculating a target distance; on the basis of the target distance, the scalp area where the tissue type is the scar lesion type is marked as the irreversible alopecia area, so that detection of the scalp health condition is completed, subcutaneous hair follicle structure disappearance and fibrosis scar tissue are accurately distinguished under the non-invasive condition, and the detection accuracy is improved. The accuracy of scar alopecia judgment and the reliability of irreversible alopecia area recognition are improved.

A surgical suturing device includes a suture needle configured to reliably pass through typically thick scar tissue present along, for example, the edge of a midline hernia. The surgical suturing device includes a first clamp and a second clamp. The suture needle is selectively supported on the first clamp or the second clamp at an acute angle, for example, relative to a longitudinal axis defined by the corresponding first clamp or second clamp. The suture needle can be selectively secured to the first clamp or the second clamp via a first needle-receiving leaflet and a second needle-receiving leaflet configured for reciprocating axial displacement. A suture thread is connected to the suture needle to perform tissue suturing.

Electrical activity is sensed from a plurality of electrodes of a multi-electrode catheter. For each of a plurality of surface locations of cardiac tissue, a processor identifies first electrical signals originating at a first depth and second electrical signals originating at a second depth, estimates a first near-field signal originating at the first depth for each of the first electrical signals and detects scar borders at the first depth based on the first near-field signals, and estimates a second near-field signal originating at the second depth for each of the second electrical signals and detects scar borders at the second depth based on the second near-field signals. Based on the scar borders detected at the first and second depths, the processor visually displays first and second maps of the heart depicting scar tissue at the first and second depths, respectively.

The invention provides a construction method and application of an artificial scar-like organ based on a micro-fluidic chip, the artificial scar-like organ is constructed based on the micro-fluidic chip with multiple channels, the tissue microenvironment can be accurately controlled through a micro-fluidic technology, and the tissue microenvironment can be accurately controlled. And epidermis, dermis and vein endothelial cells from a human body can be subjected to differential culture through design of different channels, so that a humanized scar tissue model which is more simulated compared with a traditional method is constructed. The device has the advantages of being small in size, good in visibility, derived from a human body and capable of being stored for a long time. Therefore, the model can be prepared on a large scale for scar drug treatment effect research, and experimental materials and research bases can be provided for treatment prescriptions of pathological hypertrophic scars caused by wounds and burns.

The utility model discloses a multifunctional composite scar treatment appliance, which relates to the technical field of medical supplies, and comprises two skin bonding type fitting plates, the two skin bonding type fitting plates are connected through a plurality of tension reducing belts, and the tension reducing belts are connected with the two skin bonding type fitting plates through magic tapes; a pressurizing assembly used for pressurizing the scar tissue is arranged between the skin adhesion type attaching plates and comprises an inflatable silica gel air bag, and the inflatable silica gel air bag is located below the tension reducing belt; four effective scar treatment methods of tension reduction, pressurization, electrical stimulation and drug administration are combined and can be carried out at the same time, the complexity of the treatment process is reduced, the treatment efficiency is effectively improved, the compliance of a patient is improved, and the difficulty that drug application is difficult after the tension reduction tape is used is well solved by adopting the tension reduction tape with the adjustable hook-and-loop fastener.

Methods, apparatuses, and systems to differentiate adipose tissue from scar tissue are disclosed. One or more electrophysiology data points, each of which includes an electrophysiological signal associated with a tissue location that possesses certain signal characteristics, can be collected. An adipose tissue probability and / or a scar tissue probability can be computed using the characteristics of the electrophysiological signal, such as signal duration, signal amplitude, signal fractionation, and / or late potentials. The probability computation can also utilize dielectric properties, such as tissue impedance, tissue conductivity, and / or tissue permittivity, measured at the tissue location. Graphical representations of the adipose tissue probability and / or scar tissue probability can also be output.

The invention relates to the technical field of biomedical engineering and artificial intelligence crossing, in particular to a quantitative evaluation method and system for postoperative pathological changes of liver and gall based on a DLPE algorithm, and the method comprises the steps: obtaining a multi-time-point multi-modal medical image, and generating a four-dimensional data set of spatial alignment through deep learning registration; performing multi-modal spatial-temporal feature fusion by using a parallel 3D-CNN and a cross-modal attention mechanism; inputting the fusion feature sequence into a GRU network modeling lesion dynamic evolution process, and outputting a global evolution feature vector; a voxel-level pathological evolution probability graph is generated through a three-dimensional decoder, and quantitative indexes such as the volume, the form and the signal intensity of each pathological state are extracted. By means of the technical scheme, accurate distinguishing and dynamic quantification of tumor recurrence, inflammatory edema and scar tissue can be achieved, and objectivity, accuracy and clinical decision support capacity of liver and gall postoperative curative effect evaluation are improved.

To generate, visualize, and display information representing cardiac signals. [Solution] Electrical activity is sensed from multiple electrodes of a multi-electrode catheter. For each of multiple surface locations of cardiac tissue, the processor identifies a first electrical signal occurring at a first depth and a second electrical signal occurring at a second depth, estimates a first near-field signal occurring at the first depth for each of the first electrical signals, detects a scar boundary at the first depth based on the first near-field signal, estimates a second near-field signal occurring at the second depth for each of the second electrical signals, and detects a scar boundary at the second depth based on the second near-field signal. Based on the scar boundaries detected at the first and second depths, the processor visually displays a first map and a second map of the heart showing the scar tissue at the first and second depths, respectively.