41 results about "Cerebrospinal Fluid Leakage" patented technology

The invention provides a biological repair membrane and a preparation method thereof. In the prior art, the existing biological repair membrane has the following disadvantages that the mechanical strength is poor, the suture point has the cerebrospinal fluid leakage risk, the tissue regeneration and repair promoting performance is weakened, the residual toxicity exists after the degradation, the biocompatibility is poor, and the adhesion between the repair material and the brain tissue is easily caused, and other complications are easily induced. According to the present invention, the animal-derived membrane tissue is subjected to cell removing and antigen removing, and a natural polymer material coating capable of being adsorbed and providing bleeding stopping effect is coated on the treated animal-derived membrane tissue so as to solve the problems in the prior art; the method specifically comprises: pretreatment, degreasing with an organic reagent, cell removing and antigen removing with an alkali liquid, coating preparation, vacuum compression and freeze-drying, packaging, and sterilization so as to complete the preparation of the biological repair membrane; and the biological repair membrane has advantages of bleeding stopping, antibacterial property, adhesion, natural three-dimensional space structure retaining, good mechanical property, good biocompatibility, good tissue growth induction, degradation non-toxicity, wide raw material source, low price, and easy mass-production.

The invention discloses a double-layer composite cerebral dura mater, and a preparation method thereof. According to the preparation method, medical purified pig dermis is modified with a cross-linking agent so as to obtain a matrix layer; the matrix layer is coated with a degradable high molecular membrane solution via coating method, and then is subjected to water washing and drying so as to obtain the double-layer composite cerebral dura mater. The double-layer composite cerebral dura mater repairing material is excellent in flexibility, mechanical properties, biocompatibility, and biodegradability, and is capable of preventing cerebrospinal fluid leakage and brain tissue adhesion effectively. Compared with electrostatic spinning, the coating method is capable of increasing peel strength of the matrix layer with an impervious layer; and application prospect of the double-layer composite cerebral dura mater repairing material is promising.

The invention provides an absorbable anastomosis lock nail and a lock nail holder. The anastomosis lock nail is used for repairing sella or basis cranii cerebral dura mater when treating sella lesion via a nasal transsphenoidal approach in neurosurgery or when used for neuroendoscopic surgery. The absorbable anastomosis lock nail comprises a lock head and a lock cap, the head end of the lock head is a three-rhombohedral-surface structure, a raised stopping portion is arranged on the inner wall of the lock cap, and the lock head penetrates through the stopping portion to be fixedly clamped in the lock cap when locking. The structure of the head end of the nail holder corresponds to the structure of the anastomosis lock nail, and the nail holder is provided with fixing grooves corresponding to the lock head and the lock cap. By the aid of the absorbable anastomosis lock nail, artificial cerebral dura mater or autologous fascia and an incised dura mater residual edge of the skull base of a patient can be completely repaired, various complications including cerebrospinal fluid, intracranial infection and the like which are caused by a present traditional method of filling biological glue and various filling materials into sella and sphenoid sinus are obviously reduced, and simultaneously, death rate caused by the complications is reduced.

The present invention provides an artificial dura mater which comprises an amorphous or low crystallinity polymer as a constituent component and which prevents the cerebrospinal fluid leakage.

The invention provides a composite artificial cerebral dura mater and a preparation method thereof. The composite artificial cerebral dura mater is made of polyvinylidene fluoride (PVDF) as a main body support material and a degradable polymer as an adjusting material of an orientation fiber through electrostatic spinning. The composite artificial cerebral dura mater provided by the invention is of a structure similar to an extracellular scaffold, is beneficial to cell migration, proliferation and differentiation; the main body support material PVDF in the composite material is good in proliferation and is beneficial to cell growth around a wound, a film is small in aperture, cerebrospinal fluid leakage or infection caused by bacteria is prevented, meanwhile good mechanical properties andflexibility are achieved, the composite material is good in biocompatibility, can be degraded in vivo, simple in preparation method, low in material cost and beneficial to industrial production, and degradation products are free of biotoxicity.

The invention belongs to a medical biological material technology field, concretes a chitosan fiber film, wherein the fiber film is prepared from a chitosan spinning solution, which is a mixed solution containing chitosan, hexafluroisopropyl alcohol and acetate. The invention further provides a method for preparing the chitosan fiber film, and applications of the fiber film for preparing endocranium or endorhachis defect repairing material, cerebrospinal fluid leakage plugging material or a tissue adhesion prevention medicament.

The invention discloses a novel cranial base repair material, comprising two biofilm layers and a support. The support is horizontally arranged between the two biofilm layers. The biofilm is of animalmembrane material, selected from at least one of animal pericardium, peritoneum and omentum majus; the support is a shape memory alloy support, a polymer material support or a ceramic material support. In addition, the invention also provides a preparation method and application of the novel cranial base repair material. The novel cranial base repair material has good biocompatibility, can comprise animal membrane material inducing body tissue repair and the support applicable to human transplanting, has the advantages of good manufacture simplicity, wide range of sources, good convenience ofuse, capability to induce tissue reconstruction and regeneration and the like, can prevent cerebrospinal fluid leakage, soft tissue prolapse and the like, and can provide both mechanical support andtissue regeneration induction.

The invention discloses a skull base repairing device, which comprises a support rod, a first repairing material and a second repairing material, wherein the top end of the support rod is provided with a first fixing disc; the lower end of the support rod is provided with a moving disc capable of moving on the support rod; a support frame fixedly provided with the first repairing material is arranged between the first fixing disc and the moving disc; a push rod is arranged under the moving disc; and the lower end of the support rod is also provided with a second fixing disc used for fixing the second repairing material. The invention also discloses a skull base surgical repairing method. The repairing device provided by the invention has the advantages that a surgical incision can be conveniently sealed and plugged; the phenomena of intracranial external communication lacuna and cerebrospinal fluid leakage cannot occur; when the repairing device is used, the surgical incisions of other positions of the skull base can be sealed and plugged, so that the surgical pathway is more direct; and the surgical region is more clearly exposed.

A percutaneous infratemporal fossa-orbit outer wall endoscope puncture guide plate comprises one or two base plates. Each base plate is composed of a base and a deflector, wherein the base is an arc-shaped plate attached to the radian of the temporalis outer scalp layer, and the front end of the base is consistent with the radian of hairlines; an observation hole is formed in the base; the deflector is arranged in front of the base, and the deflector and the base are integrally formed; the deflector is provided with a first guide hole containing an endoscope and two second guide holes capable of containing an ultrasonic scalpel or an aspirator, the second guide holes are located at the two sides of the first guide hole respectively, and the first guide hole, the second guide holes and the base are integrally formed. The invention further discloses an application method of the puncture guide plate. Through the puncture guide plate, operation time can be shortened, compatibility with operation equipment and monitoring equipment during an operation is high, the probability of failure in locating infratemporal fossa can be reduced, the windowing range on the orbit outer wall is guided to be 3 cm<2> to 4 cm<2>, and it is avoided that excessive windowing causes cerebrospinal fluid leakage, particularly a patient whose cerebral dura mater of anterior cranial fossa is low.

The invention discloses a chronic subdural hematoma drill cleaning drainage pipe which comprises a rubber pipe, wherein the rubber pipe comprises a short arm and a long guide pipe; the middle part of the short arm is vertically communicated with the long guide pipe; the overall shape of the short arm and long guide pipe is of T shape; a drainage hole a is arranged in the other side of the corresponding short arm at a hollow joint of the long guide pipe and the short arm; an opening of the drainage hole a is arranged as an indent arc-shaped opening; a drainage hole b and a drainage hole c are respectively arranged at tail ends of the two ends of the short arm; the openings of the drainage hole b and the drainage hole c are arranged as downward slant openings. According to the chronic subdural hematoma drill cleaning drainage pipe provided by the invention, the short arm of the drainage pipe is in contact with brain tissue during a cleaning process; the point contact of the tip of the traditional catheter is changed into the line contact, so that the injury to the brain tissue and the cortical bridging vein is avoided; the water pressure during the cleaning process is reduced; the arachnoid is prevented from being broken; the cerebrospinal fluid is prevented from being communicated with the hematoma cavity; the occurrence rate of postoperative cerebrospinal fluid leakage is lastly reduced.

The invention discloses a degradable meninx repairing material and a preparing method thereof. The degradable meninx repairing material is prepared from a bacterial cellulose film with gaps, and the bacterial cellulose film is oxidized bacterial cellulose with C6-site hydroxyl oxidized into carboxyl. The preparing method of the degradable meninx repairing material includes the following steps that 1, the gaps are formed in the bacterial cellulose film, and the bacterial cellulose film with the gaps are obtained; 2, a group oxidizing reaction is carried out on the bacterial cellulose film with the gaps obtained in the first step, and the degradable meninx repairing material can be obtained. The meninx repairing material has the synechia preventing function and the cerebrospinal fluid leakage preventing function, and can be gradually degraded while guiding auto-defect repairing of cerebral dura mater tissue.

The invention relates to the technical field of medical equipment, in particular to a visual function restoration system. Compared with the existing visual restoration system based on visual cortex stimulation, the visual function restoration system of the invention performs electrical stimulation on visual cortex by endocranium; and an implant is placed on the endocranium, the endocranium does not need to be opened in the operation process, thus avoiding risks such as operation infection, cerebrospinal fluid leakage and the like. The visual function restoration system comprises an image acquisition module, an image information extraction and compression coding module, an electrical stimulation signal generation module and a microelectrode array, wherein the image information extraction and compression coding module acquires image information by the image acquisition module, and then generates digital image and a control signal corresponding to the image information by compression coding processing; the electrical stimulation signal generation module controls the microelectrode array to output a corresponding electrical stimulation signal according to the control signal output by the image information extraction and compression coding module; and the microelectrode array is used for outputting the electrical stimulation signal.

The invention provides polyethylene glycol based hydrogel. The polyethylene glycol based hydrogel is prepared through a reaction between a polyethylene glycol derivative and a dopamine derivative. Thehydrogel has excellent adhesiveness when used for meninges repair, a wound surface can quickly form gel, the stressed wound surface can be closed separately, the blocking capability is strong, and the hydrogel is quite suitable for clinical meninges repair. The polyethylene glycol based hydrogel is good in compactness and free of permeability, cerebrospinal fluid leakage can be prevented to wellprotect brain tissue, meninges-brain adhesion cannot occur, tissue compatibility is good, a rejection reaction is avoided, and acute or chronic inflammations cannot be caused; and meanwhile, the hydrogel is safe and nontoxic, does not propagate potential known or unknown infections, can degrade at a proper speed in a body and can be replaced by new tissue.

The invention relates to a drainage apparatus for leakage of cerebrospinal fluid after spinal operation and a positive-negative-pressure drainage switching determining method. The drainage apparatus comprises a liquid storage bag and a drainage pipe, wherein one end of the drainage pipe is inserted into an inlet of the liquid storage bag, the other end is inserted into a cerebrospinal fluid accumulated position, the bottom of the liquid storage bag is connected with a liquid discharging pipe, the liquid discharging pipe is provided with a discharging control valve, and the drainage apparatus is characterized by also comprising a gravimeter and a specific gravity box for accommodating the accumulated fluid for measuring the specific gravity, the gravimeter is arranged inside the specific gravity box, the drainage pipe enters the liquid storage bag and is communicated with the inlet of the specific gravity box, and the top of the specific gravity box is provided with an opening and is communicated with an inner cavity of the liquid storage bag; and the drainage pipe is serially connected with a negative-pressure drainage ball. The drainage apparatus has the beneficial effects that while the drainage is realized, the cerebrospinal fluid can be primarily tested. By matching the switching determining method, the situation of the cerebrospinal fluid can be dynamically observed, the operation of nursing personnel is facilitated, and collection and detection procedures are simplified.

The invention relates to the technical field of medical appliances, and discloses a basis cranii repairing device for resection of pituitary adenoma via sphenoid sinus. The device comprises a first plug disc and a lumbar support formed on the first side of the first plug disc, wherein the first plug disc and the lumbar support have metal reticular structures; the second side surface of the first plug disc is coated with a first flexible blocking layer; the first flexible blocking layer is larger than the first plug disc, and the periphery of the first flexible blocking layer extends out of the edge of the first plug disc. The basis cranii repairing device can be used for effectively repairing the skull defect after repairing operation due to the first plug disc and the first flexible blocking layer, cerebrospinal fluid leakage is prevented, and infection rate is reduced.

The invention provides a sandwich-type composite membrane support, comprising a dense outer layer, a sandwich layer and an inner layer from top to bottom, the dense outer layer is a polylactic acid film, and the sandwich layer is a mesoporous organism loaded with biologically active factors Active glass spheres, the inner layer is a chitosan membrane loaded with seed cells. In order to solve the problem that the single nerve bundle that has been damaged (but not dead) cannot be repaired and treated by the existing technology; the existing drug-loaded system cannot achieve the directional release of the drug and cannot guarantee the high concentration of the damaged local factor; most loading The drug system is easy to degrade, the drug loading is low, and the drug release cannot run through the repair process of spinal cord injury. The drug loading system is too large, which may compress the spinal cord, and is not conducive to suturing the dura mater, resulting in the formation of cerebrospinal fluid leakage.

The invention relates to a gel coating accessory capable of preventing spinal surgery cerebrospinal fluid leakage, comprising a first fluid component in a first buffer solution which contains lysine, dimeric lysine or polylysine and has the pH value of 3-12 in a first container, a second fluid component of a second buffer solution with the pH value of 3-12 in a second container, a combined solid component which is composed of poly (trimethylene carbonate), polylactic acid, polyethylene glycol, polyethylene glycol polytomy isomer, polyurethane, gelatine, polyphosphate, polyglycolic acid and copolymer thereof and blend thereof in a third container as well as a coating tool. Optionally, infusion medicament which is used after spinal surgery can be contained in the first fluid component, the second fluid component and the solid component. When the first fluid component, the second fluid component and the solid component are mixed, gel is formed, and the gel can be directly coated onto the part used for preventing spinal surgery cerebrospinal fluid leakage.

The invention discloses a biological adhesive and a preparation method and application thereof. The biological adhesive comprises 4-arm polyethylene glycol amine and 4-arm polyethylene glycol succinimide succinate according to the mass ratio of 1: (0.1-10). The biological adhesive disclosed by the invention has the advantages of good biocompatibility, degradability and relatively high adhesive capacity, and is enough to tolerate the pressure of cerebrospinal fluid after being adhered to the spinal dura mater. Moreover, the biological adhesive disclosed by the invention is convenient to operatein an operation, can be independently used and does not need to be sutured, so that the operation time is greatly shortened and the operation risk is reduced. The biological adhesive disclosed by theinvention can be used for dura mater injuries of a special part which cannot be effectively sutured by a conventional method, such as injuries in front of and on the side of the dura mater and injuries in the positions of nerve root sleeves, can effectively reduce complications of cerebrospinal fluid leakage after a spinal operation, and improves prognosis of a patient.

The invention provides a polyethylene glycol-based adhesive. The polyethylene glycol-based adhesive is prepared from o-phthalaldehyde-terminated multi-arm polyethylene glycol and gelatin. According to the invention, phthalic dialdehyde-terminated polyethylene glycol (4armPEG-OPA) and a gelatin aqueous solution are cross-linked to form gel, and the gel is used for rapidly blocking and repairing damaged dura mater (dura mater and dura mater), so that cerebrospinal fluid leakage is prevented and treated, and epidural fibrosis is also prevented. The main raw materials polyethylene glycol and gelatin used in the invention have been approved by FDA for clinical use. The adhesive has good biocompatibility, biodegradability and good mechanical properties, has a low swelling rate, and does not cause the compression of tissue nerves.

The invention relates to a gel coating accessory capable of preventing brain surgery cerebrospinal fluid leakage, comprising a first fluid component in a first buffer solution which contains lysine, dimeric lysine or polylysine and has the pH value of 3-12 in a first container, a second fluid component of a second buffer solution with the pH value of 3-12 in a second container, a combined solid component which is composed of poly (trimethylene carbonate), polylactic acid, polyethylene glycol, polyethylene glycol polytomy isomer, polyurethane, gelatine, polyphosphate, polyglycolic acid and copolymer thereof and blend thereof in a third container as well as a coating tool. When the first fluid component, the second fluid component and the solid component are mixed, gel is formed, and the gel is directly coated onto the part used for preventing brain surgery cerebrospinal fluid leakage.

The invention relates to a transnasal nerve skull base repair device, a skull base repair membrane and a using method of the device. The transnasal nerve skull base repair device comprises a first repair membrane assembly used for repairing a liliequist membrane ventage and a second repair membrane assembly used for repairing a dura mater ventage. According to the transnasal nerve skull base repairing device, the skull base repairing membrane and the using method of the device, through cooperative use of the fusible biological membrane, the non-fusible biological membrane, the supporting piece, the hemostatic yarn and the fixing air bag, the technical scheme is compact in structure, high in clinical practicability and remarkable in effect; the skull base repair is successfully realized, the occurrence of postoperative complication cerebrospinal fluid leakage of the transnasal neuroendoscopy is prevented, the risk of intracranial infection is reduced, the possibility of endangering the life of a patient is reduced, the life quality of the patient is improved, and the prognosis is improved; in addition, artificial materials are adopted in the repairing process of the method.

Methods and materials for treating a cerebrospinal fluid leakage are described herein. One method for treating cerebrospinal fluid leakage includes occluding cerebrospinal fluid leakage by administering an effective amount of a self-assembling peptide solution to a target area of a cerebrospinal fluid leakage, where the self-assembling peptide is between 7 amino acids and 32 amino acids in lengthand the self-assembling peptide solution forms a hydrogel under physiological conditions.

The invention belongs to a medical biological material technology field, concretes a chitosan fiber film, wherein the fiber film is prepared from a chitosan spinning solution, which is a mixed solution containing chitosan, hexafluroisopropyl alcohol and acetate. The invention further provides a method for preparing the chitosan fiber film, and applications of the fiber film for preparing endocranium or endorhachis defect repairing material, cerebrospinal fluid leakage plugging material or a tissue adhesion prevention medicament.

A percutaneous infratemporal fossa-outer orbital wall endoscopic puncture guide plate, including 1 or 2 base plates, the base plate is composed of a base and a guide plate, the base is a curved plate that fits the curvature of the outer scalp of the temporalis muscle, and its front end and The hairline has the same curvature; the base is provided with an observation hole; the front of the base is provided with a guide plate, which is integrally formed with the base; the guide plate is provided with the first guide hole for placing the endoscope and 2 ultrasonic scalpels or The second guide hole of the suction device is located on both sides of the first guide hole respectively, and the first guide hole and the second guide hole are integrally formed with the base. The invention also discloses a usage method of the puncture guide plate. The puncture guide can shorten the operation time, has high compatibility with intraoperative surgical equipment and monitoring equipment, can reduce the probability of failure to locate the infratemporal fossa, and guide the outer wall of the orbit to open a window of about 3 cm2 to 4 cm2 to avoid excessive fenestration. Cerebrospinal fluid leaks, especially in patients with low dura mater in the anterior fossa.

The invention belongs to the field of medical instruments, and particularly relates to a four-cavity balloon supporting device for a skull base repairing part after a transnasal skull base endoscopic surgery. The device comprises four independent telescopic air bags and inflation pipelines connected with the telescopic air bags, wherein the air bags comprise a supporting balloon, two fixation balloons and a compression balloon in sequence from the far end to the near end; under the direct view of an endoscope, 5-10 ml of gas is injected into the respective inflation pipelines through an injector, so that the corresponding balloons are expanded; and the specific situation is determined according to the filling degree of the balloons observed under the endoscope. The surface of each balloon is coated with nano-loaded antibiotics and an anti-adhesion material; and the tail end of each air passage is provided with a one-way valve, and when the device needs to be pulled out after an operation, the device can be pulled out simply by opening the valves through the injector and releasing gas in the corresponding balloon. The device has dual functions of skull base supporting and compression hemostasis, and an operator can fill one or more combined balloons according to own requirements and the gasification state of the nasal cavity and the paranasal sinus of a patient. The four-cavity balloon supporting device can effectively reduce the occurrence of postoperative cerebrospinal fluid leakage, intracranial infection and other complications.

The invention discloses a biological adhesive and a preparation method and application thereof, wherein the biological adhesive comprises four-arm polyethylene glycol amino and four-arm polyethylene glycol succinate with a mass ratio of 1:(0.1-10). imidosuccinate. The bioadhesive of the present disclosure has good biocompatibility, is degradable, and has high adhesion ability, and is sufficient to withstand the pressure of cerebrospinal fluid after being adhered to the dura mater. Moreover, the bioadhesive of the present disclosure is convenient to operate during surgery, can be used alone without suture, greatly shortens the operation time, and reduces the operation risk. The bioadhesive of the present disclosure can be used for dural injuries in special parts that cannot be effectively sutured by conventional methods, such as injuries located in the anterior, lateral and nerve root sleeves of the dura mater, and can effectively reduce the complications of cerebrospinal fluid leakage after spinal surgery disease and improve patient outcomes.

The invention discloses a double-layer composite cerebral dura mater, and a preparation method thereof. According to the preparation method, medical purified pig dermis is modified with a cross-linking agent so as to obtain a matrix layer; the matrix layer is coated with a degradable high molecular membrane solution via coating method, and then is subjected to water washing and drying so as to obtain the double-layer composite cerebral dura mater. The double-layer composite cerebral dura mater repairing material is excellent in flexibility, mechanical properties, biocompatibility, and biodegradability, and is capable of preventing cerebrospinal fluid leakage and brain tissue adhesion effectively. Compared with electrostatic spinning, the coating method is capable of increasing peel strength of the matrix layer with an impervious layer; and application prospect of the double-layer composite cerebral dura mater repairing material is promising.