140 results about "Craniotomy" patented technology

The invention discloses a construction method of a cerebral artery ischemia reperfusion model, and belongs to the technical field of animal models. Three-dimensional positioning coordinates of the middle cerebral artery are obtained through magnetic resonance scanning, the far end of the middle cerebral artery can be accurately positioned, the middle cerebral artery is induced to be blocked after irradiation by setting the blood vessel irradiation position, the rose red dosage and the laser irradiation intensity and time, blood vessel recanalization is caused along with blood impact within 4-5 hours, and finally an ischemia reperfusion model is formed. Compared with a traditional craniotomy electrocoagulation middle cerebral artery (permanent occlusion) and a traditional balloon embolism middle cerebral artery (ischemia reperfusion), the construction method has the advantages that wounds on animals are smaller, the animals are easy to survive, and compared with traditional photochemical induction which can only form infarction lesions on the surface layer of the brain, the method can induce deep brain tissue to form infarction, so that the method has the advantages of being simple and convenient to operate and the like. The method can also be expanded to other brain areas to induce deep vascular occlusion. Meanwhile, the method is also suitable for carrying out model construction on old animals, and the modeling success rate is increased.

The invention relates to the technical field of perioperative period management, and provides a post-craniotomy subcutaneous effusion puncture suction and administration device which comprises a lantern ring, a plurality of fixing sleeves are fixedly connected to the inner circumference of the lantern ring and surround the inner circumference of the lantern ring at equal intervals, an expansion air bag is fixedly arranged in each fixing sleeve in a sleeved mode, and the expansion air bags are fixed to the inner circumference of the lantern ring in a sleeved mode. Cotton gaskets are arranged on the inner peripheries of the multiple fixing sleeves, and the expansion air bag enables the cotton gaskets to abut against the forehead of the patient through expansion so that the lantern ring can be fixed to the forehead of the patient. The two traction arcs are arranged in a crossed and staggered mode, sliding grooves are formed in the middle ends of the traction arcs, and an expansion fixing piece is connected to the intersection of the two sliding grooves in a sliding mode. The device can be matched with a single person to carry out subcutaneous hydrops suction and medicine injection work after craniotomy, in the suction or medicine injection process, the device assists in fixing a needle head and carrying out syringe operation with two hands, multiple persons do not need to carry out stable hydrops suction and medicine injection operation, medical convenience is improved, and manpower consumption is reduced.

The invention is applicable to the technical field of medical instruments, and provides a subskull epidural micro-invasive flexible brain-computer interface electrode, which comprises a plurality of electrode branches, each electrode branch comprises a linear flexible main body, and the flexible main body comprises a micro power supply circuit and a signal circuit which are solidified. A plurality of electrode units are arranged on the micro power supply circuit and the signal circuit at intervals, and the electrode units are electrically connected with the micro power supply circuit and the signal circuit. The brain-computer interface electrode is in a flexible line type, can be implanted into the middle artery of the meninx, does not need craniotomy, is a micro-invasive brain-computer interface, has data monitoring accuracy close to that of an invasive brain-computer interface, does not need to worry about inflammatory response, immunostimulation, biocompatibility, brain tissue damage and other adverse factors after long-term implantation, and is suitable for popularization and application. And the thrombogenic risk of a vein stent brain-computer interface does not exist.

The utility model provides an intelligent operation system for spontaneously intracerebral hematoma. The intelligent operation system comprises an endoscopic component, an endoscopic signal cable and an endoscopic probe, wherein the endoscopic component comprises an endoscopic signal cable and an endoscopic probe; comprising an ultrasonic signal cable and an ultrasonic probe; comprising a stretching-in end and a holding end, and a drainage channel, an ultrasonic channel and an endoscopic channel which are communicated are formed in the operation tube; an endoscopic probe of the endoscopic assembly is arranged at the extending end, and an endoscopic signal cable penetrates through the endoscopic channel and is electrically connected with the control assembly; an ultrasonic probe of the ultrasonic imaging assembly is arranged at the stretching-in end, and an ultrasonic signal cable penetrates through the ultrasonic channel to be electrically connected with the control assembly; the image display assembly is electrically connected with the control assembly and is used for displaying image information acquired by the endoscopic probe and the ultrasonic probe in real time; the problems that a traditional craniotomy hematoma removal operation is high in operation requirement and low in hematoma removal rate, brain tissue is prone to being damaged, and the operation effect is difficult to be universally homogenized are solved.

The invention discloses a craniotomy dura mater suspension drilling protection device which comprises two bases, the interiors of the bases are in threaded connection with threaded rods, and one end of each threaded rod is fixedly connected with a rotating wheel. By controlling the output ends of two first stepping motors, the heights of lifting seats on the two sides are inconsistent, so that two connecting rods are both in an inclined state, a sliding plate is driven to slide towards the lower positions of the connecting rods, and when the sliding plate slides to the adaptive position, a second gear is driven to rotate through the output end of a fifth driving motor, so that the height of the lifting seats is adjusted. The outer teeth, the rotating ring and the inner teeth integrally rotate, a plurality of groups of first gears are driven to synchronously rotate, a plurality of groups of second clamping pieces synchronously move towards the position close to the circle center of the mounting disc, a connecting rod is clamped, so that the transverse position of the drill bit is fixed, the position of the drill bit is conveniently adjusted, and the drill bit can be automatically replaced; and the requirements of workers are met.

The utility model provides a transcranial magnetic stimulation and near-infrared brain function imaging detection integrated device. The transcranial magnetic stimulation and near-infrared brain function imaging detection integrated device comprises a transcranial magnetic stimulation coil and a probe mounting seat, the transcranial magnetic stimulation coil comprises a plurality of coil bodies, and the paired coil bodies are matched to form a V-shaped structure on the sides facing the head of a user. The probe mounting seat is arranged on the side, facing the head of a user, of the coil body, a plurality of mounting holes are formed in the probe mounting seat and used for mounting near-infrared probes, and the near-infrared probes are used for transmitting or receiving near-infrared light to the head of the user. By means of the structure, stimulation focusing can be achieved, the stimulation depth can be increased, the treatment effect can be improved, the detection area of the near-infrared probe installed on the probe installation base can cover the treatment area of transcranial magnetic stimulation more, the coil body of the V-shaped structure enables the near-infrared probe to be attached to the head of a user, and therefore the treatment effect of transcranial magnetic stimulation is improved. The detection effect of the near-infrared probe is effectively improved, and the overall structure is more reasonable and compact.

The invention provides auxiliary equipment for clinical postoperative skull breaking and repairing in the neurosurgery department, and belongs to the auxiliary field of postoperative skull breaking and repairing. Comprising a U-shaped plate, a plurality of limiting grooves penetrating to the inner side of the U-shaped plate are formed in the U-shaped plate, an arc-shaped frame is installed above the U-shaped plate, two protective covers are installed at the top of the arc-shaped frame, and a plurality of circular plates are installed in the U-shaped plate; the clamping mechanism is located in the U-shaped plate and used for fixing the U-shaped plate to the head of a craniotomy patient; the switching assistors are located on the two sides of the protective cover, so that when the patient needs to apply medicine, medical staff can conveniently open the protective cover to apply medicine to the craniotomy position; according to the craniotomy device, by arranging the clamping mechanism and the switching assistor, the fixing position of the U-shaped plate can be flexibly adjusted according to the craniotomy part of a patient, medical staff can conveniently apply medicine to the head of the patient, and the working efficiency of the medical staff is improved.

A system of robotic surgery includes components capable of drilling a bore in the cranium of a patient in connection with craniotomy and other cranial surgeries. A perforator associated with such system is controlled by suitable computer-implemented instructions to maintain the perforator tip along a desired trajectory line while moving the perforator bit at locations proximal to such perforator tip in a circular motion, thereby imparting a conical oscillation to the perforator bit relative to the trajectory line. The angle at which the perforator bit is oscillated relative to such trajectory line results in the bore formed in the cranium having a diameter larger than the bit diameter, and the larger diameter and related conical oscillation is selected so as to reduce frictional force opposing withdrawal of the bit from the situs of the bore, thereby reducing the risk of jamming of the bit during its associated operations.

The utility model discloses a coil for transcranial magnetic stimulation and a fixing device of the coil. The coil comprises a support and the fixing device. A stimulation host is arranged at the upper end of the support, and the input end of the stimulation host is electrically connected to an external power supply; the fixing device comprises an elastic clamping ring, a first rotating plate, a second rotating plate and a supporting plate, the supporting plate is arranged at the left end of the support, the front end of the supporting plate is rotationally connected with the second rotating plate through a first rotating shaft, the lower end of the second rotating plate is rotationally connected with the first rotating plate through a second rotating shaft, and the upper end of the first rotating plate is rotationally connected with the elastic clamping ring through the first rotating shaft. According to the fixing device for the transcranial magnetic stimulation coil, the position of the transcranial magnetic stimulation coil is automatically and temporarily limited, the position of the transcranial magnetic stimulation coil is conveniently adjusted, the position of the transcranial magnetic stimulation coil can be fixed only by pressing the limiting component, the transcranial magnetic stimulation coil can be fixed more simply, conveniently and rapidly, and the fixing efficiency is improved. And clinical use of the transcranial magnetic stimulator is facilitated.

The invention relates to a brain wave signal acquisition device, belongs to the technical field of medical instruments, and solves the problems that in the prior art, a brain wave signal acquisition device is implanted into the cerebral cortex of a human body through craniotomy, the trauma of a patient is large, the surgical risk is high, and various complications can be caused. The brain wave signal acquisition device comprises a bracket main body, an electrode plate and a conductive wire; the stent body is of an open curled cylindrical structure composed of a plurality of grid units, openings are formed in the two axial ends of the stent body, and gaps are formed in the curled butt joint positions on the side wall face of the stent body. The electrode plates are arranged on the grid units; the conductive wire is wound on the stent main body, one end of the conductive wire is connected with the electrode plate, and the other end of the conductive wire is wound to the near end of the stent main body. The brain wave signal acquisition can be realized without a craniotomy operation, so that the trauma to a patient is small, and the operation risk is obviously reduced.

The invention discloses a transcranial magnetic stimulation coil based on a magnetic negative metamaterial and a method of the transcranial magnetic stimulation coil. The transcranial magnetic stimulation coil comprises a flat plate magnetic core located above an 8-shaped coil, the 8-shaped coil and the resonance type magnetic negative metamaterial located below the 8-shaped coil. On the basis of the 8-shaped coil, the flat plate magnetic core with high magnetic conductivity and the electromagnetic metamaterial with negative equivalent magnetic conductivity are introduced at the same time, and the magnetic field in the space is regulated and controlled by the flat plate magnetic core and the electromagnetic metamaterial on the basis of not changing the driving source and the 8-shaped coil winding structure; and the stimulation intensity and the stimulation precision of the stimulation coil on the brain model are greatly improved.

The invention discloses a near-infrared two-region dual-channel fluorescent nanoprobe as well as a preparation method and application thereof, and relates to the technical field of biomedical imaging. A nano probe A and a nano probe B included in the near-infrared two-region dual-channel fluorescent nano probe are both of a core-shell structure, two NIR-IIb fluorescent nano probes adaptive to different excitation wavelengths (808 nm and 980 nm) are constructed by precisely regulating and controlling the types and proportions of lanthanide elements, dual-channel imaging is achieved, limitation of a single excitation wavelength is broken through, spectral crosstalk is eliminated, and the near-infrared two-region dual-channel fluorescent nano probe has the advantages of high sensitivity, high sensitivity, high sensitivity and the like. The method has the characteristics of material uniformity and biological safety. The near-infrared IIb region dual-channel imaging system has the characteristics of high temporal-spatial resolution and signal separation, and has significant application value in the field of living body multi-target synchronous observation. Compared with a traditional two-photon microscope technology, the imaging method has a wider observation view field, a local craniotomy operation does not need to be carried out on an experimental mouse, and physiological trauma is remarkably reduced.

The utility model relates to a safer medical craniotomy automatic stop drill bit, and belongs to the technical field of medical instruments. Comprising a connecting sleeve assembly and a drill bit assembly, one end of the connecting sleeve assembly is assembled with the end of an output shaft of an electric drill in an inserted mode, the other end of the connecting sleeve assembly is assembled with the drill bit assembly in a sleeved mode, and the connecting sleeve assembly comprises a connecting sleeve, a locking ejector pin, a spring and a spring seat; a spring seat is slidably inserted into the connecting sleeve close to the drill bit assembly, and the locking ejector pin and the spring seat are connected through a spring. The drill bit assembly comprises an inner drill bit, an outer drill bit and a shell, the shell sleeves the connecting sleeve and the outer drill bit, the outer drill bit sleeves the inner drill bit, internal threads are arranged on the circumferential wall, making contact with the outer drill bit, of the shell, external threads are arranged on the outer circumferential wall of the outer drill bit, and the shell is connected with the outer drill bit through the threads. The drill bit can stop automatically, and meanwhile the outer drill bit is prevented from disengaging.

The utility model provides a folding transcranial magnetic stimulation coil, which comprises a left coil and a right coil, the left coil and the right coil are symmetrically arranged, the left coil and the right coil are respectively folded along a transverse axis and a longitudinal axis, and the folding angle is variable. The folding angles of the two coils along the transverse axis and the longitudinal axis are adjusted, the fitting degree of the coils and the human brain is improved, the stimulation intensity and the stimulation depth of the transcranial magnetic stimulation coil on the cerebral cortex layer are improved on the basis that focusing performance is kept, and the transcranial magnetic stimulation coil is simple in structure, convenient to machine and capable of being widely applied to the technical field of medical equipment.

The invention relates to a brain-computer interface system which comprises a flexible electrode array, a receiving device, a flexible connecting wire and external equipment, wherein the flexible electrode array is implanted into a meninx middle artery in a minimally invasive manner through a superficial temporal artery puncture and a vascular intervention procedure; the receiving device is embedded under the skin of a head and is provided with a signal transmitter; the external equipment is provided with a signal receiver. A flexible electrode array is implanted in an anterior branch or posterior branch of a main branch of a middle meninx artery through a superficial temporal artery intravascular minimally invasive technology, the number of electrodes and the array are arranged according to needs, and a receiving device buried in the subcutaneous part of the head is electrically connected with the flexible electrode array implanted in the middle meninx artery. Craniotomy is not needed, operative complications are avoided, minimally invasive implantation reaches the surface of the cerebral cortex, operation of a doctor is easier, the operation time is shortened, and the comfort level of a patient is improved.

The utility model discloses a transcranial magnetic stimulation and near-infrared brain function acquisition synchronization system. The system comprises a visual stimulation issuing device, a transcranial magnetic stimulation issuing device, a transcranial magnetic stimulation coil racket, a near-infrared brain function imaging acquisition device and an acquisition optical fiber. The visual stimulation issuing device is respectively connected with the near-infrared brain function imaging acquisition device and the transcranial magnetic stimulation issuing device; the near-infrared brain function imaging acquisition equipment is connected with one end of the acquisition optical fiber, and the other end of the acquisition optical fiber is connected with a scalp target; the transcranial magnetic stimulation issuing device is connected with the transcranial magnetic stimulation coil racket. According to the utility model, the transcranial magnetic stimulation can be carried out on a patient, and the synchronous marking of the visual prompt time point can be carried out on the acquired near-infrared signal by the near-infrared brain function imaging acquisition equipment, so that the delay error caused by the manual marking of the visual prompt time point can be avoided.

The present invention discloses a pressure relief device implantation kit and a method for using the same. The pressure relief device implantation kit comprises: a cannula, wherein the interior of the cannula is a hollow structure, and a cannula seat is provided at the proximal end of the cannula, a positioning sheath is provided on the inner wall of the cannula seat, and the distal end of the cannula is open; a puncture needle, wherein the puncture needle is sharp at the distal end and can extend further distally from the distal end of the cannula; a solid needle, wherein the distal end of the solid needle is smooth and blunt; a delivery needle, and a pressure relief device. The proximal ends of the puncture needle, the solid needle, and the delivery needle all have needle seats, and each needle seat is provided with a positioning groove that cooperates with the positioning sheath. The puncture needle, the solid needle, and the delivery needle are all configured to be inserted into the cannula. According to the present invention, craniotomy is not required for the patient during treatment, which reduces the difficulty of the operation, the labor intensity of the operator, and the time of the operation. The incision is small, which reduces the burden and pain of the patient, and the pressure relief device can be accurately delivered to the target site.

The present invention relates to a novel intracranial aneurysm occlusion device and a manufacturing method thereof. The occlusion device includes an occlusion device body, a radiopaque marker, a delivery guide wire, a separation point, a delivery tube, and a separator. The radiopaque markers are respectively fixed to the distal end and the proximal end of the occlusion device body. The occlusion device is woven into a net shape by 24 - 72 strands of nitinol shape memory alloy wire. After the occlusion device is fully expanded, radiopaque markers are provided at both the distal end and the proximal end, and the radiopaque markers respectively bundle and fix the nitinol shape memory alloy wires at the distal end and the proximal end of the occlusion device. The delivery guide wire is located inside the delivery tube. A separation point is provided between the radiopaque marker at the proximal end of the occlusion device and the distal end of the delivery guide wire. The proximal end of the delivery guide wire is connected to the separator. The manufacturing method of the occlusion device is shaped by an occlusion device mold. Without craniotomy, for intracranial aneurysms with a narrow upper part and a wide lower part, giant aneurysms, and bifurcation aneurysms, by implanting the occlusion device body, the occlusion device has a stable structure, can quickly and densely fill the aneurysm cavity after deployment, thereby slowing down the blood flow in the aneurysm cavity, reducing the impact pressure of the blood on the aneurysm cavity, enhancing the repair ability, and achieving the purpose of treating aneurysms.

The utility model relates to the technical field of medical instruments, in particular to a post-craniotomy intracranial pressure maintaining device which comprises a first supporting leg, a second supporting leg is arranged at the rear end of the first supporting leg, and a first adjusting screw is jointly arranged on the lower portions of the sides, close to each other, of the outer surface of the first supporting leg and the outer surface of the second supporting leg. The outer surface of the first adjusting screw rod is sleeved with a movable block, the outer surface of the first adjusting screw rod is sleeved with a first locking nut, a supporting frame is movably installed on the upper portion of the rear end of the outer surface of the first supporting leg, and a supporting frame is jointly and movably installed on the lower surface of the rear end of the supporting frame and the upper surface of the movable block. A second adjusting screw rod is arranged in the middle of the front end and the rear end of the inner surface of the supporting frame, and the outer surface of the second adjusting screw rod is sleeved with a U-shaped pillow. The device is reasonable in design, the effect of keeping the intracranial pressure of the patient stable can be achieved by adopting a special body position rest mode, and meanwhile the phenomenon of head bedsore can be reduced while recovery of the patient is facilitated.

The present invention relates to the field of medical care appliances, and provides a craniotomy postoperative care device, comprising: a soft cushion, a base, a pillow piece, a fixed telescopic rod, a fixing piece, and a lifting and lowering structure. The device is fixed to a bed by the fixed telescopic rod and the fixing piece. The lifting and lowering structure in the base can realize the lifting and lowering of the soft cushion, and the pillow piece can be rotated up, down, left, and right by rotating a No. 1 rotating ball inside the base. The present invention rotates the pillow piece around by the No. 1 rotating ball, and then lifts and lowers the soft cushion by the lifting and lowering structure, thereby solving the problem in the prior art that the patient's head is hit by agitation or convulsions after waking up, causing secondary damage to the head.

The utility model discloses an adjustable transcranial magnetic stimulation positioning cap which comprises an elastic bridle, a side edge positioning magnetic stimulation block is arranged on the inner side of the elastic bridle, a top end positioning magnetic stimulation block is arranged at the top end of the elastic bridle, and a connecting wire harness is arranged on the side edge of the top end positioning magnetic stimulation block. A connecting plug wire is arranged in the middle of the top end of the top end positioning magnetic stimulation block, and a limiting cap is arranged at the bottom end of the top end positioning magnetic stimulation block. An anti-bending assembly is arranged on the outer side of a connecting plug wire at the top of a top end positioning magnetic stimulation block, and the inner side of an arc-shaped limiting piece is pushed to be attached to the outer portion of the joint of the connecting plug wire and the top end positioning magnetic stimulation block through the elastic force of a damping spring during use; in the using process of the transcranial magnetic stimulation positioning cap, the bending degree of the connecting plug wire is reduced through buffering of the damping spring, and the situation that the connecting position of the connecting plug wire and the top end positioning magnetic stimulation block is excessively bent, broken and damaged and even safety accidents occur is avoided.

The invention discloses a head compression tourniquet, which relates to the technical field of medical auxiliary instruments and comprises a compression belt, and a plurality of annular main adjusting air bags are arranged on the inner side wall of the compression belt. Through arrangement of a triangular block, a rotating shaft, a connecting plate, a U-shaped rod, a first wedge-shaped block, a second wedge-shaped block, a limiting rod and an adjusting spring, the compression position of a patient can be automatically switched while the hemostasis effect is guaranteed, and the situation that the same position is compressed all the time through a craniotomy for several hours, and consequently blood vessels are bonded is avoided; the problems that when the auxiliary air bag is switched, the end tissue is necrotic, and hair cannot grow out are solved, by arranging a pressure release valve, the inflation volume of head circumference changes of different positions of the head is adjusted in a self-adaptive mode when the auxiliary air bag is switched, and therefore the effect that the auxiliary air bag is switched to keep the same pressure on the head all the time is achieved; the problem of massive bleeding of a wound due to insufficient pressure is avoided, and the problem of thrombus caused by blood vessel blockage of a patient with overhigh pressure is also avoided.

The invention provides a pressure injury preventing air bag body position cushion based on a multi-mode perception algorithm, which comprises a head air bag group, a back air bag group, a sacrococcygeal region air bag group, a lower limb air bag group and an upper limb air bag group, and further comprises an air bag unit connected with the head air bag group, the back air bag group, the sacrococcygeal region air bag group, the lower limb air bag group and the upper limb air bag group, the head air bag set, the back air bag set, the sacrococcygeal portion air bag set, the lower limb air bag set and the upper limb air bag set are all connected with the intelligent inflation control system, and through the air bag structure design and functional modules, diversified body position changes are achieved, pressure injuries of a patient are reduced, and the safety of the patient is improved. Meanwhile, the special nursing requirements of different patients, such as a patient with a rear pillow craniotomy, a patient needing prone position treatment and a patient with quadriplegia, are met, the nursing effect of the patient in the intensive care unit is improved, and the rehabilitation speed of the patient in the intensive care unit is increased.

This invention relates to the field of medical control technology, specifically to a glioma ECoG electrode localization system based on the fusion of multimodal MRI and intraoperative photographs. It includes a brain imaging data acquisition module for preoperative acquisition of multimodal brain imaging data and an acquisition module for acquiring intraoperative craniotomy photographs for ECoG electrode placement. The system further aligns the multimodal brain imaging data to the same three-dimensional spatial coordinate system; then segments and corrects the multimodal brain imaging data into different regions; and establishes an individualized brain region atlas based on a healthy brain tissue texture model and segmented brain regions. Vascular structures are extracted, and a three-dimensional spatial coordinate system for vascular feature points and electrode contacts is established and transformed. The minimum Euclidean distance is calculated based on the electrode contacts, and the individualized brain region atlas is labeled. This invention addresses the problems of insufficient spatial positioning accuracy of electrode contacts and difficulty in quantifying tumor-electrode distance during surgery for glioma patients, facilitating intraoperative determination of the anatomical location of the epileptogenic focus by surgeons.

A guidewire driven brain-computer interface system for minimally invasive implantation is provided that includes a flexible electrode array and a plurality of flexible guidewires attached to the flexible electrode array. The flexible electrode array comprises a plurality of insulated poly-p-xylylene-C layers, metal interconnection lines and electrodes. The plurality of flexible guidewires are configured to be guided by an external mechanical force such that the flexible electrode array passes through a craniotomy field and is deployed by tracking the plurality of flexible guidewires. The flexible guidewires each include a manipulation tip and a pull wire.

The utility model relates to a skull craniotomy operation negative pressure suction device, including the flexible cover made of transparent material, the flexible cover one end big, one end small arrangement and small scale end cover set in one end of milling cutter, the cutter head of milling cutter is located in the chamber of flexible cover, flushes the head and is along the cover mouth circumference direction interval arrangement many groups of flexible cover, flushes the head with the liquid guide export of flush equipment and passes through the pipeline intercommunication, one end of suction pipe stretches into the chamber of flexible cover, the other end of suction pipe and the suction mouth of negative pressure suction device are connected through the pipeline, adopts transparent flexible cover to form the physical barrier, will the milling cutter head completely wrap up in the chamber, breaks out the bone splinter to the surrounding environment, and the flush head of circumference even distribution sprays physiological saline to the center, forms the spiral water flow in the chamber, can ensure the light transmittance of flexible cover, can clearly milling cutter head and the contact state of bone window, cooperation suction operation of suction pipe, can suck out the bone splinter that splashes out of flexible cover, and further can effectively prevent the bone splinter splashing problem.

A non-fixed implant is proposed, which is made of raw materials including a biomaterial, a ceramic matrix composite with excellent osteoconductivity, and a polymer. The non-fixed implant can be precisely fixed to the gap between the skull and the bone flap and can be conveniently used. A method for manufacturing the non-fixed implant is also proposed. The non-fixed implant includes a flexible wedge that can be deformed to conform to the outer contour of the bone flap, and a plurality of wings connected to the upper or lower part of the flexible wedge and extending to both sides of the flexible wedge. The wings have a porous structure. The wings on one side will be located on the bone flap, while the wings on the other side will be located on the skull. The non-fixed implant has the following advantages: it can precisely fill the defect formed by craniotomy, has improved biocompatibility and osteointegration ability, and allows tissue invasion.

The utility model discloses a drainage tube placement height measuring device after craniotomy, which comprises a sliding plate and a graduated scale, the inner end of the graduated scale is rotatably arranged at the left end of the sliding plate, and the graduated scale is provided with scales for measuring distance. The sliding plate is arranged to be aligned with the reference object, the calibrated scale is arranged to measure the distance relative to the sliding plate, and therefore the placement position of the drainage tube after craniotomy can be determined, alignment through visual inspection is avoided due to the fact that the sliding plate is used for alignment, and distance measurement is conducted through the calibrated scale; the accuracy of distance measurement and the convenience and efficiency of determining the placement position of the drainage tube can be effectively improved, and the working pressure of clinical nurses in related departments is relieved. Besides, the graduated scale can rotate relative to the sliding plate, so that the relative position between the graduated scale and the sliding plate can be adjusted, various measurement modes can be met, the positions of various drainage tubes can be determined, and the practicability is very high.

To provide a skull model facilitating the understanding of an operation including a brain stem, a skull base, a posterior fossa, and a craniocervical spinal cord transition part since there is no suitable model corresponding to the examination of the operation including the brain stem, the skull base, the posterior fossa, and the craniocervical spinal cord transition part such as an approach to an important part, for example, an ExtremeLateralApproach and a TranscondylarApproach in the operation including the skull base part.SOLUTION: A head model for training or teaching craniotomy of disease in the skull, comprising at least a portion of the temporal bone, the posterior fossa, and the atlanto-occipital joint.SELECTED DRAWING: Figure 1

A cranial fixation device for decompression / expandability craniotomy is described, the device comprising a lid and a plurality of brackets (3A, 3B, 3C, 3D, 3E, 3F), designed to treat a pathology causing a herniation accompanied by an increase in intracranial pressure, and is of the type comprising forming an opening in the skull by milling along the craniotomy edge to be suitable for allowing expansion of the brain, and applying the lid having a protective and accommodating function for the brain at a certain distance perpendicular from the craniotomy edge, and the lid is connected to the craniotomy edge by a plurality of brackets (3A, 3B, 3C, 3D, 3E, 3F) that are simultaneously fixed to the lid and the craniotomy edge.