16 results about "Cerebrospinal fluid" patented technology

The application discloses an injectable double-layer drug sustained-release hydrogel and a preparation method and application thereof, and relates to the field of drug sustained-release hydrogels. The swelling and degradation curve and mechanical property detection of the hydrogel show that, when the swelling rate ratio of the inner layer hydrogel to the outer layer hydrogel is 14% to 10%, the secondary damage of the optic nerve caused by extrusion can be avoided; meanwhile, the hydrogel has suitable mechanical strength and adhesion to cope with the in-vivo environment. The hydrogel precursor solution has good injectability, and the gelation time can be controlled within 2 minutes, which perfectly matches the short time window of the optic nerve decompression surgery, and has high clinical practical value. The application solves the major surgical risk of cerebrospinal fluid leakage when the optic nerve is locally administered, and solves the problems of the traditional local drug carrier, such as lack of in-situ stability and easy displacement. The application can synergistically regulate the injury microenvironment and promote the long-acting sustained-release of nerve regeneration, successfully integrates multiple functions such as surgical safety, drug long-acting sustained-release, biocompatibility and operation convenience, and provides an unprecedented effective strategy for solving the clinical problem of the optic nerve injury.

A method for estimating a number of phagocytes in a body fluid of an animal includes stimulating NADPH oxidase activity of the phagocytes; and quantifying a resulting reductive dioxygenation of a chemiluminigenic substrate by an emitted chemiluminescence of the chemiluminigenic substrate using an instrument capable of measuring light. The NADPH oxidase activity of the phagocytes is preferably stimulated by an immunologic or chemical capable of activating a respiratory burst by the phagocytes. The NADPH oxidase activity of the phagocytes is preferably stimulated by a stimulus in solution or coated to a surface contacted by the phagocytes. The stimulus is preferably phorbol myristate acetate (PMA). The animal is preferably human, and the body fluid is preferably blood and / or spinal fluid. The phagocytes are preferably neutrophil leukocytes, and the chemiluminigenic substrate is preferably lucigenin (N,N′-dimethyl-9,9′-biacridinium dinitrate). Also provided is a method of treatment based on the estimation method.

The present disclosure relates to a method of reducing urine glycosaminoglycans (GAG) or cerebral spinal fluid (CSF) glycosaminoglycans (GAG) in a subject, comprising: administering a single dose of a population of modified B cells to the subject.

The utility model discloses a lumbar postoperative drainage tube fixing device, and relates to the technical field of medical instruments. The drainage device comprises a fixing band, a drainage tube groove of an inverted-T-shaped structure is formed in the front face of the fixing band, an opening gap is formed in the position, corresponding to the drainage tube groove, of the back face of the fixing band, a plurality of water cushions distributed in a rectangular array mode are fixedly installed on the front face of the fixing band, and a group of drainage ball fixing bags are fixedly installed at the two ends of the fixing band respectively. The device is bound to a wound, the wound can be pressurized and fixed, cerebrospinal fluid is reduced, a drainage ball and a drainage tube penetrate from the back face of the fixing band to the front face of the fixing band through the opening gap, and then the drainage tube connected with the wound is placed in the drainage tube groove to be preliminarily fixed. Then the drainage ball needed to be used for drainage is placed in the drainage ball fixing bag, finally, the drainage tube is connected with the drainage ball, and the drainage ball can be placed by selecting a proper drainage ball fixing bag according to the body position of a patient.

Various examples are provided for disposable medical sensors that can be used for the detection of cerebral spinal fluid. In one example, a medical sensing system includes a disposable sensing unit comprising a functionalized sensing area disposed between electrodes; and a portable sensing unit analyzer including pulse generation circuitry that can generate synchronized gate and drain pulses and a transistor with a gate electrically coupled to one electrode. A gate pulse output of the pulse generation circuitry is electrically coupled to a second electrode and a drain pulse output is electrically coupled to a drain of the transistor. In another example, a method includes providing a sample to a functionalized sensing area, generating synchronized gate and drain pulses for a transistor, the gate pulse provided via the electrodes and functionalized sensing area, and sensing an output of the transistor that is a function of a target concentration of the sample.

Disclosed is a composition for supporting survival and differentiation of neural precursor cells (NPCs) grafted into a neurological injury or disease site, the composition comprising: (a) a gel forming molecule; and (b) a chemokine receptor type 5 (CCR5) antagonist. Also disclosed is a method of treating a neurological injury or disease of a subject, comprising (a) mixing NPCs with the composition as disclosed herein; and (b) administering a mixture of the NPCs and the composition into a neurological injury or disease site of the subject, to thereby support survival and differentiation of the NPCs. Also disclosed is use of a mixture of NPCs and the composition as disclosed herein in the manufacture of a medicament for treating a neurological injury or disease of a subject, wherein the mixture is to be administered into a neurological injury or disease site of the subject, to thereby support survival and differentiation of the NPCs. Further disclosed is a kit for use in supporting survival and differentiation of NPCs grafted into a neurological injury or disease site, the kit comprising: (a) the composition as disclosed herein; (b) artificial cerebral spinal fluid (a-CSF); (c) CaCl2; and (d) thrombin.

A method for estimating a number of phagocytes in a body fluid of an animal includes stimulating NADPH oxidase activity of the phagocytes; and quantifying a resulting reductive dioxygenation of a chemiluminigenic substrate by an emitted chemiluminescence of the chemiluminigenic substrate using an instrument capable of measuring light. The NADPH oxidase activity of the phagocytes is preferably stimulated by an immunologic or chemical capable of activating a respiratory burst by the phagocytes. The NADPH oxidase activity of the phagocytes is preferably stimulated by a stimulus in solution or coated to a surface contacted by the phagocytes. The stimulus is preferably phorbol myristate acetate (PMA). The animal is preferably human, and the body fluid is preferably blood and / or spinal fluid. The phagocytes are preferably neutrophil leukocytes, and the chemiluminigenic substrate is preferably lucigenin (N,N′-dimethyl-9,9′-biacridinium dinitrate). Also provided is a method of treatment based on the estimation method.

The invention provides a high-stability anti-ganglioside antibody detection membrane strip and a kit comprising the same, and belongs to the technical field of biological detection. The detection membrane strip comprises a carrier membrane and a ganglioside antigen coated on the surface of the carrier membrane, the surface of the carrier membrane is combined with the antigen through a thiol-Schiff base double-dynamic covalent network, and the network is composed of a Schiff base bond formed by a carrier membrane aldehyde group and an antigen sugar chain amino group, and a disulfide bond formed by a carrier membrane thiol group and an antigen lipid tail thiol group. The directional fixation of the antigen can be realized, and the dynamic repair capability is realized; a cascade anti-oxidation system is embedded into the network, so that the antigen stability is synergistically improved. The kit containing the membrane strip can be used for detecting the anti-ganglioside antibody in serum, plasma or cerebrospinal fluid, and solves the problems of short period of validity, large batch difference and the like caused by the fact that an existing detection membrane strip is easy to oxidize antigens and poor in coating stability.

The present disclosure relates to a method of reducing urine glycosaminoglycans (GAG) or cerebral spinal fluid (CSF) glycosaminoglycans (GAG) in a subject, comprising: administering a single dose of a population of modified B cells to the subject.

The invention discloses a neurosyphilis diagnosis and prediction system and method based on XGBoost, and the system comprises a data input module, a data preprocessing module, a model prediction module, a result visualization and explanation module, a user management module and a data storage module which are electrically connected in sequence. The data preprocessing module is configured to perform missing value filling and abnormal value processing on original data, a dual-prediction model based on an XGBoost algorithm is built in the model prediction module, and the dual-prediction model is constructed to cover different clinical scenes: Model 1 aims at a complete diagnosis and treatment scene of cerebrospinal fluid indexes, Model 2 aims at a basic-level cerebrospinal fluid index missing scene, and Model 3 aims at a basic-level cerebrospinal fluid index missing scene. By integrating multi-region diagnosis guide core indexes, utilizing multi-center data to train an optimization model and introducing an interpretability module, non-invasive, precise and high-consistency auxiliary diagnosis of neurosyphilis is realized, unnecessary lumbar puncture operation is reduced, and clinical diagnosis efficiency is improved.

This invention relates to the field of medical device technology and discloses an easily adjustable intelligent drainage device for critically ill neurosurgical patients. The device includes a drainage tube, a collection bag, a control box, a flow rate regulator, and a magnetically self-locking reflux device. The drainage tube includes an inlet end near the patient's cranium and an outlet end connected to the collection bag. The flow rate regulator and the magnetically self-locking reflux device are positioned between the inlet and outlet ends. The control box contains a main control module, a display module, and a storage module. The collection bag is specifically a sterile inner bag with a miniature patch-type liquid level sensor. The sterile inner bag is connected to the outlet end. An infrared drip rate sensor is installed on the outer wall of the inlet end. Both the liquid level sensor and the infrared drip rate sensor are electrically connected to the main control module. This invention achieves intelligent and precise drainage of cerebrospinal fluid, prevents reflux and blockage, provides automatic monitoring and early warning, reduces complications, alleviates the burden on medical staff, and improves drainage safety and efficiency.

The application belongs to the technical field of electrophysiological recording, and discloses a preparation method of brain slices of middle-aged and old mice for electrophysiological recording and application, wherein a modified artificial cerebral spinal fluid (ACSF) for brain slices of old mice is introduced in the preparation process of brain slices of middle-aged and old mice, which comprises: an artificial cerebral spinal fluid (section ACSF, sACSF) used when the brain slices of middle-aged and old mice are prepared, and an artificial cerebral spinal fluid (culture ACSF, cACSF) used when the brain slices of middle-aged and old mice are incubated for electrophysiological recording. In the method, the activity of the brain slices of middle-aged and old mice is significantly improved and the duration of the activity is prolonged by the use of the two ACSFs, high-quality brain slice samples of middle-aged and old mice are provided for the research on neurodegenerative diseases such as aging, Alzheimer's disease and Parkinson's syndrome, and the method has a wide application prospect in scientific research.

A robust, quantitative, and reproducible process and assay for diagnosis of a neurological condition in a subject. The method includes measurement of two or more biomarkers in a biological fluid such as CSF or serum resulting in a synergistic mechanism for determining the extent of neurological damage in a subject with an abnormal neurological condition and for discerning subtypes thereof or tissue types subjected to damage.

The application provides N-doped carbon quantum dots and a preparation method and application thereof. The N-doped carbon quantum dots are prepared by using ginsenoside, ethylenediamine and water as raw materials and by adopting a hydrothermal synthesis method. The N-doped carbon quantum dots have high biological safety, are mainly composed of carbon elements, are not doped with metal elements and have high biocompatibility. Compared with traditional iron chelating agents, the N-doped carbon quantum dots have strong ROS scavenging properties and have stronger therapeutic effects. The N-doped carbon quantum dots have good physical stability, and the N-doped carbon quantum dots in artificial cerebrospinal fluid do not change in physical properties obviously within 28 days. The preparation method of the N-doped carbon quantum dots has simple synthesis technology, low synthesis cost, does not produce reaction waste and is conducive to clinical transformation.