40 results about "Mediastinum" patented technology

Apparatus and method for performing surgical procedures within the mediastinum and within the pericardium include an endoscopic cannula having a transparent tip, and an endoscope for introduction into the mediastinum and optionally into the pericardium via a single subxiphoid incision. A cavity may be initially dilated for advancing the endoscopic cannula using a dilating tool that exerts a lateral-expansive force against surrounding tissue for evaluating the endoscopic cannula to be introduced into the mediastinum. Other surgical instruments are positioned through the endoscopic cannula to cut a flap of the pericardium as an opening through which other surgical apparatus may be introduced. The endoscopic cannula may be swept around selected regions of the heart through an aperture near the apex of the heart to facilitate placement of epicardial tacks about regions of the heart.

Biocompatible liquid is pumped into a body cavity (eg. subarachnoid space, peritoneum, mediastinum, pleural space) by means of one pump and removed from it by means a second pump, preferably via a double-barreled catheter is used for insertion and removal of the liquid. An optional secondary catheter removes liquid from a distal area of the body cavity. Temperature and pressure are sensed within the cavity and can be controlled by adjusting liquid flow rates. While outside the body, the liquid can be ultraviolet-sterilized, foam fractionated to remove contaminants, oxygenated and pH balanced, cooled or warmed, and augmented with exogenous liquid that may contain drugs.

A method for diagnosing pulmonary hypertension from phase-contrast magnetic resonance (MR) images includes providing a time series of one or more magnetic resonance (MR) flow images of a patient's mediastinum during one or more cardiac cycles, segmenting the pulmonary artery within each image of the times series of images, identifying the anterior wall and pulmonary valve within the segmented pulmonary artery, analyzing blood flow during a diastolic phase of the one or more cardiac cycles to determine a relative duration of blood flow, t_streamlines, during the diastolic phase, analyzing blood flow during a latter portion of a systolic phase and a subsequent diastolic phase of the one or more cardiac cycles to detect the presence and duration t_vortex of a vortex, and diagnosing the presence of pulmonary hypertension from t_streamlines and t_vortex.

A method for automatically identifying a potential pleural effusion in medical image data of a thorax of a patient from a scan by means of a medical scanner is provided. It includes at least the steps of accepting rib cage detection data of the rib cage of the patient from the image data, which rib cage detection data include rib cage extent data of a rib cage extent of the interior of the rib cage, accepting lung detection data of the lung of the patient from the image data, which lung detection data comprise lung extent data of a lung extent of the external boundary of the lung, accepting mediastinum detection data of all organs of the mediastinum in the thorax (Th) of the patient from the image data, which mediastinum detection data comprise mediastinum extent data of a mediastinum extent of the external boundary of the mediastinum, and subtracting the lung extent and the mediastinum extent from the rib cage extent while forming pleural effusion identification data.

The invention discloses an improved lung node puncture positioning needle assembly which comprises a puncture needle with an inner hole and a positioning guiding wire penetrating through the punctureneedle, a V-shaped barb is arranged at the positioning end of the positioning guiding wire, the end, opposite to the positioning end, of the positioning guiding wire is a push end, and a reinforcing part is arranged at the portion, close to the positioning end, of the positioning guiding wire. The assembly is characterized in that a bent part with the memorizing function is arranged at the portion, close to the positioning end, of the positioning guiding wire, the bent part deforms to be linear when the positioning guiding wire is inserted into the inner hole of the puncture needle, and the bent part recovers to be bent after the positioning guiding wire gets away from the inner hole of the puncture needle. When the V-shaped barb of the positioning end of the positioning guiding wire hooksthe focus of the disease, and after the puncture needle is pulled out, the V-shaped barb on the positioning guiding wire is matched with the bent part, the positioning guiding wire is stopped from moving forwards and backwards, and the probability that the positioning guiding wire is disengaged from the focus of the disease to be retracted into the chest wall or slide into the mediastinum is eradicated.

The invention provides a method and system for generating a longitudinal lymph node segmentation model, and relates to the technical field of medical image processing, and the method comprises the steps: obtaining lung CT images of a plurality of thoracic surgery patients, carrying out the three-dimensional reconstruction of each lung CT image, and obtaining a three-dimensional image; respectivelycarrying out three-dimensional segmentation on each three-dimensional image to obtain a three-dimensional marked image marked with a real longitudinal lymph node lesion area; grouping the three-dimensional annotation images to obtain a training set, a test set and a correction set; training the training set to obtain a diaphragm lymph node segmentation model; inputting the test set into a longitudinal lymph node segmentation model to obtain a corresponding segmentation image, and calculating the segmentation accuracy of the longitudinal lymph node segmentation model; if the segmentation accuracy is smaller than an accuracy threshold, enabling the correction set to correct the diaphragm lymph node segmentation model; and if the segmentation accuracy is not less than the accuracy threshold,storing the diaphragm lymph node segmentation model. The accuracy of longitudinal lymph node segmentation is effectively improved, manual intervention is not needed, and the practicability is high.

The invention relates to an image sag repairing method based on a double-Graham scanning method. The method comprises the following steps that: utilizing a boundary tracing method for a lung mask subjected to preliminary segmentation to solve the boundary point set P of a left lung and a right lung; utilizing the Graham scanning method to obtain the salient point set Q of the left lung and the right lung; solving the lung sag point to be repaired; removing the solved lung sag point to be repaired from the boundary point set P, wherein the obtained residual point set is the edge point set of the pulmonary parenchyma; detecting whether the segmented pulmonary parenchyma contains breakage or not, and if the segmented pulmonary parenchyma contains breakage, carrying out breakage connection; and finally, obtaining an integral segmented pulmonary parenchyma segmentation result. After sag repair and breakage connection are carried out, a final integral pulmonary parenchyma segmentation resultis obtained. The sag on the outer wall of the lung can be repaired, and the method performs a good repairing and smoothening function on adjacent sags including a heart, a mediastinum and the like between two pieces of pulmonary parenchyma and can provide a correct and reliable basis for subsequent pathological study.

The invention discloses a precious archives exhibition cabinet. The space of the cabinet body is divided into an upper central cavity for preventing precious archives, a lower equipment cavity, a left cavity, and a right cavity. A glass cover covers the front side of the upper central cavity. The upper rear cover covers the rear side of the upper central cavity, the front cover covers the front side of the lower equipment cavity, and the lower rear cover covers the rear side of the lower equipment cavity; the left medial partition, the right medial partition and the lower rear cover are provided with ventilation holes, and the central cavity A temperature sensor and a humidity sensor are installed on the inner side of the top wall, and an air-conditioning system is installed in the equipment chamber on the lower floor. The ventilation hole set on the left mediastinum is pumped from the upper central cavity to the left cavity and then returned to the air-conditioning system. The operation of the air-conditioning system is controlled by the signals collected by the temperature sensor and the humidity sensor. The invention has the advantages of compact structure, low cost, small weight, convenient transportation and basically no sound.

A method and apparatus for carrying out tomographic image processing that enables lung areas and a mediastinum in a chest tomographic image to be reproduced in one image with appropriate contrast is provided. Image data representing a chest tomographic image are obtained by using a tomography apparatus. Normalization means in a tomographic image processing apparatus normalizes the image data and obtains normalized image data. Compression processing means carries out dynamic range compression processing on the normalized image data to compress a high density range thereof. The image data after the compression processing are subjected to frequency enhancing processing, and the image data after the frequency enhancing processing are then subjected to tone conversion processing. The processed image data obtained in the above manner are reproduced by a reproduction apparatus.

The invention provides a noninvasive detection kit for nasopharyngeal carcinoma susceptibility genes. The kit comprises a specific primer, a DNA sequencing primer, a PCR (Polymerase Chain Reaction) component, a PCR product purification component, a DNA sequencing reaction component and the like, wherein the specific primer is used for detecting the polymorphic site genotypes of four mononucleotides of the Rsall polymorphism on a CYP2E1 gene, the polymorphism of a G252 site on a TNF (Tumor Necrosis Factor)-alpha gene, the deletion (Present/Null) of a GSTM (Giant Solide Turner Of The Mediastinum) 1 gene and the deletion (Present/Null) of a GSTT (Gross Saponin From Tribulus Terrestris) 1 gene. According to the kit, the risk level of nasopharyngeal carcinoma of a subject is evaluated according to the genotypes of two mononucleotide polymorphic sites closely related to the nasopharyngeal carcinoma, and then, according to the gene detection results of each subject, the subjects are guided from the gene level to specifically prevent the nasopharyngeal carcinoma so as to reduce the morbidity risk rate of the nasopharyngeal carcinoma. The sampling method of the kit adopts oral mucosal cell sampling which is painless and non-invasive, and cross-infections are avoided. The sequencing detection result of the kit is accurate and reliable, and is easy to popularize because expensive import special instruments are not needed to be purchased.

The invention discloses an oxytropis ehrig fungus alternaria FEL4-OOc which is preserved in the China type culture collection center on October 8, 2008, and the preservation code is CCTCC NO: M 208143. Bacterial colony of bacterial strain is in a circular shape with regular edges, the bacterial colony is white during early culturing period and gradually changes to gray, celadon and black as the culturing time is prolonged, and the centre of the bacterial colony slightly protrudes. Mycelium has transverse septa but has no mediastinums, and is relatively dense. Conidiophores peduncles grow on Part of the aging hypha, and the conidiophores peduncles have braches. The conidiophores are less in amount and brown in color, and are singly distributed in a scattered mode. The conidiophores have the2-5 transverse septa with thicker transverse septa films but have no mediastinums, ; spores are in long rod shapes and column shapes with the size of 30 to 90 microns*5 to 10 microns. The bacterial strain is obtained from leaves, stems, flowers or seeds of yellowflower crazyweed herbs through manual separation and filtration, and has the function of synthesizing main toxin, i.e. spherosin of the yellowflower crazyweed herbs.

The invention discloses an oxytropis ehrig verticillium FEL5-AS1 of a synthesized swainsonine which is preserved in China Center for Type Culture Collection on 8th, Oct of 2008, with the preservation number of CCTCC NO: M 2008144. The colony of the bacterial strain is round, which is white at first. With the extension of the culturing time, the colony gradually changes into straw yellow, tan and pitchy, and the center processes a little. Mycelium has transverse layers but has no mediastinum. Part of aged mycelia produces conidiophores which have branches. The conidiophores bend like knee bending, and spore formation scars are obvious. Conidia and conidiophores have transverse layers but have no mediastinum. The diaphragm of the conidia is thick, and the transverse layers consist 1-4. The spores are bar-shaped, similar to column. The size of the conidia is 20-90Mum multiplied by 5-10 Mum. The bacterial strain is obtained from leaves, stems and seeds of astragalus strictus by artificial separation and screening and has the function of synthesizing swainsonine (SW) which is main toxin of locoweed.

The invention discloses an oxytropis Ehrig cinerea FEL2-OG which is preserved in China type culture collection center on October 18, 2008, and the preservation code is CCTCC NO: M 208142. Bacterial colony of bacterial strain is in a circular shape, is white in the beginning, and gradually changes to primrose yellow, yellow brown and black brown, and the centre of the bacterial colony slightly protrudes. Mycelium has transverse septa but has no mediastinums. Conidiophores peduncles grow on part of the aging hypha h, and the conidiophores have braches. Conidiophores and the conidiophores peduncles have transverse septa but have no mediastinums, the transverse septa film of the conidiophores is thicker, and the number of the transverse septa is 1 to 3; spores are in long rod shapes and are similar to column shapes, and the size of the conidiophores is 20 to 70 microns*5 to 10 microns. The bacterial strain is obtained from leaves, stems and seeds of oxytropis glacialis through manual separation and filtration, and has the function of synthesizing main toxin, that is swainsonine (Swainsonine, SW) of locoweed.

The invention discloses a storage device for liquid additives used in papermaking, which includes a packaging bag body, the packaging bag body includes a box body and a box cover, a cover plate is arranged in the box body, and a hole for the liquid auxiliary agent bottle to pass through is arranged in the center of the cover plate. The box is provided with a liquid additive bottle placement area, and the liquid additive bottle placement area is provided with a transverse septum and a longitudinal septum, and the transverse septum and the longitudinal septum intersect each other to separate the liquid additive bottle placement area into multiple In the cavity of the bottle, the longitudinal septum is provided with a first through slot, the vertical height of the first through slot is less than the height of the longitudinal septum, and the vertical height of the first through slot is equal to the vertical height of the transverse septum, The first slot is located at the upper end of the mediastinum. In this technical solution, in order to fix the liquid auxiliary agent bottles placed in the cavity and avoid collisions with each other during transportation, an accommodating hole made of stacked rings is provided at the bottom of each cavity, which can The lower end of the liquid auxiliary agent bottle is fixed.

The invention provides systems, devices, and methods for performing catheter-based procedures in the heart. In specific embodiments a procedural catheter is introduced into the mediastinum from a suprasternal access site. The procedural catheter is passed through a wall of the heart, preferably at an extrapericardial location on the atrial dome. The procedural catheter is used to perform a procedure in the heart such as mitral valve repair or replacement, using remote catheter visualization techniques.

The present invention discloses a pericardium mediastinum drainage device capable of continuously generating negative pressure. The pericardium mediastinum drainage device capable of continuously generating negative pressure comprises a balloon (1), a head end of the balloon (1) is provided with a one-way valve I (2), and the one-way valve I (2) is connected with a pericardium mediastinum drainagetube (3); a tail end of the balloon (1) is provided with a one-way valve II (4) and the one-way valve II (4) is connected with a catheter (5); and a flow direction of the one-way valve I (2) is the same as a drainage direction and the flow directions of the one-way valve I and the one-way valve II are the same. The pericardium mediastinum drainage device has characteristics of convenient operation and high safety.

The invention discloses a spliced double-balloon contrast agent delivery tube for salpingography, which comprises a delivery catheter connected to the inner side of a breather tube in a penetrating manner, a balloon tube nested on the outer side of the breather tube, and a drug delivery three-way catheter fixedly mounted at the rear end of the delivery catheter, the upper end of the conveying catheter is provided with a medicine inlet valve, the gas injection three-way catheter is fixedly installed at the rear end of the breather pipe, the upper end of the gas injection three-way catheter is provided with a gas injection sealing plug and a medicine injector, and the gas injection three-way catheter is installed on the rear side of the medicine conveying three-way catheter in a communicating mode. The spliced double-balloon contrast agent delivery tube for salpingography can be provided with two balloon structures at the same time, and contrast agents can be injected from the double delivery tubes at the same time, so that contrast observation can be conveniently carried out on uterine cavities of patients with double uteruses or complete mediastine uterus at the same time, discomfort of the patients is reduced, and the working efficiency of the patients is improved. And the radiography efficiency and quality are effectively improved.

The invention discloses an integrated xiphoid costal margin lower orientating and positioning guider and a using method thereof. The integrated xiphoid costal margin lower orientating and positioning guider comprises a first guiding pipe and a second guiding pipe which are arranged in a coaxial and separated mode, and the first guiding pipe and the second guiding pipe are fixedly connected through a connecting rod; the first guiding pipe is of a pipe-shaped structure of which the interior is provided with a cylindrical cavity in a communicated mode, a hollow semicircular pipe with an upward opening is adopted as the second guiding pipe, and a guiding channel allowing a puncturing device to penetrate into is formed in the cylindrical cavity and the hollow semicircular pipe. Accordingly, the problem that in a xiphoid lower anterior mediastinum operation through a novel endoscope, no appropriate instrument for xiphoid lower gap separating and guiding exists is solved.