31 results about "Renal cortex" patented technology

The invention discloses a method for segmenting renal cortex images. The method comprises the following steps of: 1, performing initial segmentation on a kidney image by using a statistical shape model algorithm to acquire grid images of an initial outer surface S' of a kidney structure; 2, establishing sub-graphs G0 and G1 for the outer surface and the inner surface of a renal cortex respectively in a narrow band close to the grid images of the initial outer surface S' so as to obtain a weighted directed graph G=(G0, G1), designing cost functions C0 and C1 by aiming at the outer surface and the inner surface of the renal cortex respectively, generating an s-t graph Gst based on the weighted directed graph G=(G0, G1) and the cost functions C0 and C1, and extracting two layers of optimal surface images, namely an outer surface image S0 and an inner surface image S1 of the renal cortex, by using a max-flow minimal cut method; and 3, generating a data image Vcortex of a renal cortex body by using the outer surface image S0 and the inner surface image S1 of the renal cortex. By the method, the renal cortex structure can be segmented accurately, and the workload for manually segmenting the renal cortex is greatly reduced, so the method has important application values in the field of segmenting the renal cortex images and ventricular wall images with multi-surface structural characteristics.

The invention relates to the use of human bendazac lysine in pharmaceutical industry, wherein the bendazac lysine possesses substantial actions for reducing hypoglycemia and saccharifying hemoglobin and urine protein, thus can be applied to the prevention and treatment of diabetes.

The invention discloses a three-dimensional renal cortex positioning method based on a three-dimensional active contour model and three-dimensional Harvard transformation. The method includes the model establishing training part and the positioning part. The model establishing training part includes the steps that 10-20 sets of three-dimensional data are selected as training data; slices are selected through interpolation correction; marking points are drawn; a model is established through the three-dimensional active contour model, and the model is obtained and comprises an abdominal cavity outer contour, a renal cortex outer surface and a renal cortex inner surface; a kidney contour is stored in an R-table. The positioning part includes the step of searching positioning and the step of positioning the renal cortex; in the step of searching positioning, the kidney contour stored in the R-table is used for positioning the gravity center point of the whole kidney through the three-dimensional Harvard transformation; when the renal cortex is positioned, the model obtained through three-dimensional active contour model establishing is placed in the found gravity center of the kidney, and parameterization is performed and the range is regulated to be smaller so that searching can be performed on the gravity center point till the positioning result is obtained. With the method, the specific position of the renal cortex can be fast and effectively positioned.

The invention discloses an application of a low-dose ursolic acid as a medicament for treating diabetic early nephropathy. The administration mode of the ursolic acid is oral administration, and the administration dose is 50-70mg/kg weight. The invention verifies that the oral administration of the low-dose ursolic acid has a remarkable inhibition action for the activation of ERK1/2 and JNK accesses in an MAPK access in a renal cortex induced by diabetes and the phosphorylation level of STAT3 tyrosine and can markedly lower the expression of iNOS in the renal cortex induced by the diabetes, and more importantly, the oral administration of the ursolic acid can inhabit the glomerular hypertrophy caused by the diabetes and the accumulation of type IV collagen at glomerulus, thereby indicating that the oral administration of the ursolic acid has a remarkable therapeutic effect on the diabetic early nephropathy.

The invention discloses a renal cortex locating method based on a statistical shape model. The method includes a training stage and a renal cortex locating stage. The method is characterized in that in the training stage, artificial marks L1 and L2 of a kidney of each three-dimensional CT image in a training data set are made, binary data in L1 and L2 marking regions is converted to surface data M1 and M2 in a corresponding manner, interior surface data of renal cortex is calculated, and a renal cortex statistical shape model is established. According to the method, in the training stage, the renal cortex statistical shape model is established to perform statistics on the change mode of renal cortex, and the accuracy and the rapidity of locating of renal cortex are improved by employing an iteration model deformation algorithm.

The invention discloses a folding electrode resectoscope. The resectoscope comprises an endoscope, an operating handle and an electric cutter, the endoscope comprises an endoscope rod, and the operating handle detachably sleeves the endoscope rod; the electric cutter comprises a cutting electrode and a supporting rod connected with the cutting electrode, the cutting electrode is arranged on the end portion of the supporting rod, an electrode steering structure enabling the end portion of the supporting rod to rotate along an arc path is arranged on the supporting rod, and the electrode steering structure comprises a node structure enabling the end portion to rotate around an axis and a traction structure connected with the end portion and the operating handle; through operation on the operating handle connected with the traction structure, the supporting rod can be driven to rotate in a folding mode, the cutting electrode can conduct cutting along the radian of a sac wall, the risks ofsac wall bleeding, damage to a renal cortex, fat liquefaction and the like are reduced, the defect that an existing electrode resectoscope can only linearly conduct cutting forward and backward is remedied, operation is easy and convenient, and the operation efficiency is improved while wounds are reduced.

The invention belongs to the technical field of medicine, and relates to a 15-methylene-14-deoxy-11,12-dehydro-andrographolide derivative. Experiments prove that the compounds obviously inhibit the migration and activation of hepatic stellate cells, obviously inhibit the mesenchymal transition of TGF-beta 1-induced human alveolar type II epithelial cells A549, obviously inhibit the mesenchymal transition of human renal cortex proximal convoluted tubule epithelial cells HK-2, and obviously inhibit the migration of angiotensin II (Ang II)-induced primary human cardiac fibroblasts HCFB. The compound is taken as an active ingredient for preparing anti-fibrosis drugs, has high efficiency and low toxicity, provides a new drug route for the treatment and prevention of fibrosis-related diseases, and thus the selectable range of clinical drugs is expanded, so that the derivative has a good application and development prospect.

The invention discloses a non-uniform graph search partitioning algorithm used for renal cortex positioning. The algorithm is characterized by comprising steps of (1), defining a multi-scale boundary function when segmentation starts so as to realize non-uniform sampling on nodes; (2), defining different weights according to characteristics of renal cortex during segmentation and using a max-flow/minimal-cut algorithm for detecting an optimal surface for segmentation. The segmentation speed is high and the segmentation accuracy is high according to the invention.

The invention discloses a unicapsular nephrostomy tube preventing and treating percutaneous nephroscopy postoperative bleeding; the unicapsular nephrostomy tube mainly comprises a nephrostomy tube and a renal cortex airbag; the renal plevis end of the nephrostomy tube is provided with an opening so as to discharge urine and small calculus outside human body; a plurality of nephrostomy tube side wall drainage ports are arranged between the nephrostomy tube and the renal cortex airbag, thus ensuring the urine to be smoothly drained; the renal cortex airbag is sleeved on the tube wall of the nephrostomy tube in a position having certain distance from the front end of the nephrostomy tube; the renal cortex airbag is connected with a renal cortex airbag air inlet; one end of the renal cortex airbag air inlet is provided with a spring clip.

The invention discloses an E-cadherin methylation detection method based on a hydrosulphite sequencing method. The E-cadherin methylation detection method includes the steps that firstly, rats which are 6-7 weeks old are selected, the kidneys of the killed rats are collected, connective tissue is sheared off, the renal cortex is taken and sheared into 50-100 mg tissue fragments, and the tissue fragments are quick-frozen with liquid nitrogen and stored in a -80 DEG C refrigerator; secondly, genome DNA is extracted with a genome DNA extraction reagent kit; thirdly, the concentration and purity of genome DNA are measured with a nucleic acid quantometer, the integrity of genome DNA is detected through 0.5%-1.0% sepharose gel electrophoresis, and DNA samples detected to be qualified are placed in a -20 DEG C--80 DEG C refrigerator for use; fourthly, genome DNA is modified with a methylation conversion reagent kit, and the concentration of modified genome DNA is determined with the nucleic acid quantometer; fifthly, PCR amplification is carried out under different experiment conditions; sixthly, samples used in follow-up steps are selected in the fifth step. By means of the E-cadherin methylation detection method, the success rate of E-cadherin methylation experiments is increased.

A system and method for automatically estimating a hepatorenal index (HRI) from ultrasound images s provided. The method includes acquiring a sequence of ultrasound image data until a desired ultrasound image view is obtained. The method includes segmenting, a liver and a renal cortex in the obtained ultrasound image view. The method includes identifying valid samples in the liver and the renal cortex in the obtained ultrasound image view by excluding invalid samples. The method includes automatically positioning a liver region of interest and a renal cortex region of interest in the obtained ultrasound image view based on the valid samples and at least one criterion. The method includes determining an HRI and causing a display system to present the HRI.

A renal cortex targeting elastin-like polypeptide (ELP), a renal medulla and cortex targeting ELP, and a method of treating a renal disorder are provided. The renal cortex targeting ELP includes up to 95 repeat units having the sequence VPGXG (SEQ ID NO: 1), where X in each of the repeat units is any amino acid except proline. The renal medulla and cortex targeting ELP includes at least 95 repeat units of SEQ ID NO: 1, where X in each of the repeat units is any amino acid except proline. The method of treating a renal disorder includes administering an ELP and a therapeutic drug to a subject in need thereof, where the ELP includes up to 671 repeat units of SEQ ID NO: 1 and X in each of the repeat units is any amino acid except proline.

Bio-dialysis therapy using JianShengBao to treat nephropathy uremia uses a preparation which is prepared from, by mass, 30 parts of Radix Astragali, 30 parts of mountain ginseng, 30 parts of wolfberry fruits, 20 parts of Salvia miltiorrhiza, 10 parts of rheum officinale, 20 parts of Herba Plantaginis, 20 parts of unprocessed rehmannia root, 10 parts of Dianthus superbus, 50 parts of balsam pear, 50 parts of watermelons, 50 parts of tomatoes, 50 parts of papaya, 50 parts of luffa, 50 parts of wax gourd, 100 parts of brown sugar and 1000 parts of purified water. Chinese herbal medicines, fruits and vegetables are fermented to effectively reduce toxic components in the microbial composite preparation, the dialysis therapy of patients is effectively realized only through oral administration without toxic or side effects; and the preparation obtained after the fermentation contains a large number of probiotics, biological enzymes and 16 kinds of amino acids, and can supplement nutrients to cells, kill harmful bacteria, promote cell metabolism, promote cell repairing and regeneration, purify blood, promote the repairing and the regeneration of renal cortex and renal medulla cells and promote the recovery of the filtering function and the secreting function of renal cells in order to treat the nephropathy uremia.

The invention is a simplified model on kidney rejection in animals and its setting approach. The method involves isolating dendritic cells from male mice and isolating T cells from female mice and then using the naive T cells in vitro to culture concurrently with male dendritic cells. Those activated T cells from female origin were injected into renal cortex in male mice for the purpose of attacking renal cortex. The animal model simulates the renal transplant rejection method to enable effective induction of renal transplant immune reaction.

The aim is to avoid that under guiding of B-mode ultrasounds, after percutaneous kidney puncture catheterization, repeated puncturing catheterization caused by blocking of a drainage tube causes injuries, and decreases the occurrence rate of kidney bleeding after catheterization. The invention provides a percutaneous double catheterization cannula used for kidney puncturing catheterization. The cannula is mainly composed of a double catheterization cannula outer tube and a double catheterization cannula inner tube, and a renal cortex airbag is arranged at the front segment of the double catheterization cannula outer tube and is charged with air to press the renal cortex for stopping bleeding; the outer diameter of the double catheterization cannula inner tube is slightly smaller than the inner diameter of the outer tube, and the double catheterization cannula inner tube can be fixedly connected with the outer tube through a fixing device. In this way, under the condition that the innertube is blocked, the inner tube can be replaced without pulling out the outer tube, and it is avoided that repeated puncturing injures a patient.

The invention belongs to the technical field of medicines, and discloses an application of herba andrographitis lactone decalin derivatives in preparing drugs for preventing and treating various tissue and organ fibrosis of human bodies, and relates to herba andrographitis lactone decalin structural modified derivatives. The herba andrographitis lactone decalin structural modified derivative has astructure as shown in general formula I. Experiments show that the compounds can significantly inhibit the migrating activation of hepatic stellate cells, can significantly inhibit the mesenchymal transition of TGF-beta 1 induced human alveolar type-II epithelial cells A549, can significantly inhibit the mesenchymal transition of renal cortex proximal convoluted tubule epithelial cells HK-2, andcan significantly inhibit the migration of Angiotensin II (AngII) induced human heart myofibroblast HCFB. The compounds are used as active ingredients to prepare fibrosis-resisting drugs and are efficient and low in toxicity, and can provide a novel drug way for treating and preventing fibrosis related diseases, thereby enlarging the selection range of clinical medication, and having good application and development prospect. (Shown in the description).