34 results about "Percutaneous vertebroplasty" patented technology

The present invention relates to the medical field, in particular relates to the practice of percutaneous vertebroplasty where a pair of syringes in the distal extreme of a lengthened hydraulic device, are united by a camera of intermediate connection of larger diameter (pressure exerting body) or modified inverted syringe tube with a bolster, a hydraulic connecting tube of flexible material that transmits the pressure of the smaller diameter manual or impulsion syringe in the proximal extreme of the device toward the intermediate cylindrical larger diameter camera (pressure exerting body), this camera is in an inverted position with regard to the first syringe (fluid control), this intermediate camera has a moving piston longitudinal to the axis of the cylinder that is controlled with the first syringe (manual) and in cooperation with the atmospheric pressure. The injecting syringe loaded with bone cement is coupled with the bolster of the body of pressure, and to the needle that drives the cement toward the interior of the bone. The intermediate camera (pressure exerting body) together with the hydraulic tube and the manual syringe form a hydraulic press system (F/A=f/a) that allows to increase in a potential way the pressure exerted in the first syringe and to make the injection of polymethylmethacrylate (PMMA) at an approximate distance of 1.0 m to 1.5 m.

The present invention relates to medically useful devices and methods for introducing flowable compositions into mammalian body cavities. More specifically, the devices and methods of the present invention are useful for introducing restorative compositions into intraosseous cavities. Such devices and methods are particularly useful in percutaneous vertebroplasty or kyphoplasty procedures for the controlled introduction of bone cement into a vertebral cavity.

Compositions for use in treating and repairing orthopedic defects are provided. The compositions are especially useful for performing percutaneous vertebroplasty, percutaneous kyphoplasty and other procedures. When cured, the compositions are relatively solid but compressible, and prior to curing are viscous liquids with a low enough viscosity to fill voids in cavities such as voids within fractured vertebrae. Optionally, the properties of a composition according to the invention can be adjusted taking into account the hardness and density of the orthopedic structure to be repaired. Also disclosed are devices and methods for using the compositions, and a kit containing components for forming and utilizing the composition.

The invention provides a fluid cement for medical use for bone reconstruction, in particular for filling the vertebral body, and a binary composition which is intended for the preparation of such a cement. The invention also provides a device for conditioning the binary composition, and a method of preparing a bone cement from a binary composition. The fluid cement according to the invention comprises: a) approximately 60% to 85% by weight of a polymer comprising a polymethylmethacrylate and a methylmethacrylate monomer and b) approximately from 15 to 40% by weight of a radio-opaque composition. Preferably, the radio-opaque composition comprises a radio-opacifier, such as barium sulfate and zirconium dioxide, in a mixture with a calcium phosphate, for example apatite hydroxide.

The invention discloses a vertebral oriented dilated balloon catheter which is used in the percutaneous vertebroplasty in the field of orthopedic medical devices. The vertebral oriented dilated balloon catheter comprises a catheter, wherein a Y-shaped connector is connected to one end of the catheter, and a balloon is connected to the other end of the catheter; a probe extends into the balloon after passing through a joint of the Y-shaped connector and the catheter, and a ray label is arranged on the head of the probe; an oriented casing is sleeved outside the catheter, and a forward-protruding oriented separation blade is arranged on the head of the oriented casing; and the oriented separation blade is positioned at the outer side of the balloon. According to the vertebral oriented dilated balloon catheter with the structure, the balloon can dilate towards a preset dilation resetting direction, so that the degree of fracture injury on a vertebral body breakage part cannot be sharpened, and re-fracture is avoided.

The purpose of the present invention is to provide a bone cement composition which can have desired biological activity performance and desired radiolucency while enabling the strength of a cured product thereof to be kept. A titanium oxide coating is formed on radiolucent particles to thereby produce composite particles, and the composite particles are added to a bone cement composition. The bone cement composition thus produced can be used suitably for the filling of a bone defect portion and the fixation of an artificial joint and in percutaneous vertebroplasty. The shape of each of the radiolucent particles is preferably granular, and the titanium oxide is preferably of a rutile type.

The invention relates to a preparation method of a degradable high polymer reticular balloon for vertebral fracture treatment. The reticular balloon is obtained by electrostatic spinning of a biodegradable high polymer material into fibers, and receiving of a balloon receiver. The balloon is 1-10mm in inside diameter; the film thickness of the balloon is controlled to be 0.1-0.2mm; and the fibers are 0.2-1.5 micrometers in diameter. The degradable high polymer reticular balloon has good biocompatibility, mechanical property and degradation property, avoids a secondary operation clinically, promotes generation of a new bone, and facilitates recovery of a patient. Bursting pressure of the prepared balloon mainly depends on the film thickness of the balloon; when the film thickness is 0.1-0.2mm, the bursting pressure of the balloon is 6-20atm; the tensile strength is 6MPa; and a compressed vertebral body can be raised and even recovered fully. The degradation mass around simulated body fluid, lipase and human serum is 10-20%. The problems such as scattering and leakage of bone cement are solved. The defects of PVP (Percutaneous Vertebroplasty) and PKP (Penetrating Keratoplasty) are overcome, the operative application scope is extended, and the preparation process of the method is simple.

The present invention discloses a surface-drug-loading vertebroplasty dilatation balloon and a preparation method thereof. The surface-drug-loading vertebroplasty dilatation balloon comprises a balloon body, a drug-loading film is attached on surface of the balloon body, the drug-loading film is composed of at least two drug-loading coating layers, and the first drug-loading coating layer directlycontacting the balloon body is formed by electrospinning. The surface of the balloon body is provided with the drug-loading film, and the drug-loading film is composed of a plurality of the drug-loading coating layers, can be retained in body after the balloon is withdrawn, forms an outer shell enclosing bone cement, plays a function of effectively releasing the drugs at desired sites, improves function efficiency of the drugs, and also prevents the bone cement from detaching from positions. The vertebroplasty dilatation balloon has multiple functions, improves postoperative effects of percutaneous vertebroplasty and percutaneous kyphoplasty, and is especially suitable for treatments of osteoporosis and related compression fractures.

Compositions suitable for use as, for example, dental, craniofacial or long-bone fillers, percutaneous vertebroplasty agents and kyphoplasty agents, comprise an injectable biomaterial cement and a radiopacity-improving agent in an amount sufficient to improve the radiopacity of the injectable biomaterial in vivo. The radiopacity agent comprises strontium bromide (SrBr2) and/or strontium iodide (Srl2).

The invention provides a bone cement injection device for percutaneous vertebroplasty. The bone cement injection device comprises a sleeve, a push rod and a stylet. Two parallel passages, namely, an injection passage and a decompression passage are arranged inside the sleeve longitudinally. The injection passage and the decompression passage are provided with independent open-type openings on the upper end face of the sleeve respectively. The injection passage and the decompression passage are communicated with each other at the lower end of the sleeve and penetrate to a port at the bottom end of the sleeve. The stylet loaded with bone cement is guided into the injection passage and connected to the front end of the port at the bottom end of the sleeve. The push rod is disposed in the injection passage. By the decompression device, overhigh pressure in centrum is avoided when bone cement is injected into the centrum by the device, and accordingly various operative complications are avoided.

The invention belongs to the technical field of percutaneous vertebroplasty forming, and more specifically relates to a unilateral percutaneous puncture vertebral body guider. The unilateral percutaneous puncture vertebral body guider comprises a bottom plate, a positioning plate and a mounting plate rotationally mounted at two ends of the bottom plate respectively; a bracket is mounted on the positioning plate; a first sliding groove is formed in the bottom plate. A puncture groove is formed in the first sliding groove; arc-shaped sliding rails are mounted on the bracket and the mounting plate; a guide mechanism is mounted on the arc-shaped slide rail in a sliding manner; the guide mechanism comprises a first mounting base; a second sliding groove is formed in the first mounting base; a first fixed seat is mounted on one side of the first mounting seat; a first preformed groove is formed in the first mounting base; a first adjusting wheel is mounted in the first preformed groove in ahinged manner; a guide cylinder is arranged in the first adjusting wheel in a radial penetrating mode, a second connecting rod is installed on an angle ring, a spirit bubble is installed on the secondconnecting rod, and an infrared emitter parallel to the guide cylinder is installed on the first adjusting wheel and used for solving the problem that medical staff and patients need to make contactwith rays repeatedly due to the fact that the number of times of fluoroscopy in an operation is large.

The invention provides a percutaneous vertebroplasty (PVP) operating system capable of bilaterally injecting bone cement at the same time. The system comprises a puncture needle 1, a puncture needle 2, a connection pipe 3, a connection pipe 4, a three-way device 5 and a conveyor 6, the puncture needle 1 is connected with the connection pipe 3, the puncture needle 2 is connected with the connection pipe 4, the other end of the connection pipe 3 and the other end of the connection pipe 4 are connected with two ends of the three-way device 5, and the conveyor 6 is connected with the other end of the three-way device 5, wherein the three-way device 5 is provided with a switch 7.

The invention discloses a local anaesthesia injection device for percutaneous vertebroplasty. The local anaesthesia injection device for percutaneous vertebroplasty comprises a fixing sleeve, a sliding plate, a first containing hole, a first one-way valve, a sliding rod, a draining hole, a connecting plate, a second containing hole, a second one-way valve, a puncture needle, a connecting sleeve, afirst voidance hole and a first rubber pad. The local anaesthesia injection device for percutaneous vertebroplasty is ingenious in structure, powerful in function and easy to operate; by using the device, a medical worker can perform secondary anaesthesia on a patient without replacing the device with a new anaesthesia injection device, the labor intensity of the medical worker is relieved, and the patient is protected.

The invention belongs to the technical field of percutaneous vertebroplasty, and specifically comprises a bilateral percutaneous puncture vertebral body guider, the bilateral percutaneous puncture vertebral body guider comprises a bottom plate and a mounting plate rotationally mounted on the bottom plate, a positioning plate is mounted on bottom plate, first sliding grooves are formed in the bottom plate, a second sliding groove is formed in the first sliding groove, first guide mechanisms are slidably mounted on the two sides of the positioning plate and located in the first sliding grooves,the first guide mechanism comprises a first mounting base, a first angle ring is mounted on the first mounting base, a first preformed groove is formed in the first mounting base, a first adjusting wheel is rotationally mounted in the first preformed groove, a first guide cylinder is radially arranged in the first adjusting wheel in a penetrating manner, a first fastening stud is provided with a first rotary knob, a first fixing frame is provided with a first fixing base, the first adjusting wheel is fixedly provided with a first positioning column, and the first positioning column is arrangedin the first fixing base in a penetrating mode and used for solving the problem that medical staff and patients need to make contact with rays repeatedly due to the fact that the number of times of fluoroscopy in an operation is large.

The invention relates to a stent for percutaneous vertebroplasty having a substantially tubular body, which can be transferred from a compressed state to an expanded state. Both, in the longitudinal direction and in the peripheral direction of the stent, the wall of the tubular body has a plurality of openings, which ensure the expansion. At least in the expanded state, the stent has a cross-sectional shape that deviates from a circular shape.

The invention discloses a percutaneous vertebroplasty device with precise control and accurate measurement of bone cement. The percutaneous vertebroplasty device comprises a push rod assembly and a syringe assembly. The push rod assembly comprises a sleeve rod and a push rod; the sleeve rod is provided with a cavity with an opening in one end, an elastic piece extends into the cavity to drive thesleeve rod to move, and the other end of the elastic piece abuts against the push rod. The syringe assembly comprises a sleeve and a hollow cylinder; the top of the sleeve is provided with a limitingplate, and the limiting plate is provided with limiting grooves for clamping the hollow cylinder; the push rod assembly is used for pushing liquid in the hollow cylinder. According to the percutaneousvertebroplasty device, the push rod assembly is adopted for replacing a traditional piston push rod; on one hand, one end of the sleeve rod is provided with a solid part which can adopt a metal material and has sufficient strength; on the other hand, the sleeve rod is connected with the push rod through the elastic piece, an operator can judge the amount of the injected bone cement according to the pressure of the push rod.

The invention discloses a pedicle positioning and guiding device for percutaneous vertebroplasty, which comprises a sleeve provided with a puncture hole, and also comprises a spinous process fixing rod, wherein the spinous process fixing rod is vertically connected with a graduated scale, the graduated scale is slidably provided with a sliding rod, the sliding rod is respectively perpendicular tothe graduated scale and the spinous process fixing rod, the sliding rod is rotatably provided with a base, and a rotating shaft of the base is respectively perpendicular to the sliding rod and the spinous process fixing rod; the sleeve is connected with the base, the base is fixedly provided with an angle disc, and the sleeve and the angle disc are respectively perpendicular to the rotating shaftof the base. The invention also discloses an operation method thereof, wherein the spinous process fixing rod is fixed at the highest position of the spinous process and is perpendicular to the longitudinal axis of the vertebral body, the sliding rod and the sleeve are adjusted so that the sliding rod reaches a displacement of L, and the sleeve rotates an angle alpha and is aligned with a first positioning point. Compared with the prior art, the device has accurate positioning, can reduce the fluoroscopy times of the X-ray machine and shorten operation time and bleeding amount in an operation.The device is used for simulation teaching, shortens the learning curve during vertebral body forming, and is more suitable for practical application.

The invention discloses a degradation type bone repairing material, which comprises a mixed solid phase material and a liquid phase, wherein the mixed solid phase material comprises biological activity glass, calcium phosphate and magnesium silicate hydroxide, the liquid phase comprises blending solution, the particle size of the biological activity glass is smaller than 50[Mu]m, the particle size of the calcium phosphate is smaller than or equal to 100[Mu]m, and the particle size of the magnesium silicate hydroxide is smaller than or equal to 100[Mu]m. Through the above way, a biological activity glass-calcium phosphate-magnesium silicate hydroxide ternary system is adopted, so that the degradation type bone repairing material can be pushed for injection, exhibits ideal self-curing absorbability, can serve as a bone repairing substitute material, and can be used in percutaneous vertebroplasty, knee and hip joint replacement surgeries and other bone fracture surgeries.

The invention provides a bone cement push-injecting multi-section synchronous micro-controller applied to percutaneous vertebroplasty. The micro-controller is designed into a one-inlet two-outlet shunting structure. The flow of two outlets can be adjusted through an adjusting screw, a scaleplate is installed beside the adjusting screw, scale marks are arranged on the scaleplate, the accurate position of the adjusting screw can be displayed, and the opening sizes of the two outlets and the flow of bone cement of the two outlets can be further calculated. If three push-injection points exist, one device can be connected to one outlet again. If four push-injecting points exist, devices can be connected to the two outlets respectively. If five or more push-injecting ports exist, sequential connection can be carried out with the similar method, and the flow of each outlet can be controlled by adjusting the adjusting screw on each device. By means of the device, multi-point simultaneous push-injecting can be achieved, the bone cement is push-injected at a time after being mixed at a time, and the setting time is easy to control. Only one push-injector is used for multiple points, and thecost is low. X-ray irradiation is carried out once, and the radiation quantity received by the patient is small.

The invention discloses a novel bone filler delivery system, which comprises an operating passage and a delivery component. The operating passage comprises an operating cannula and a cannula handle, and the delivery component comprises a delivery tube, a delivery tube handle and an outer sleeve mechanism. The outer sleeve mechanism is in a rigid structure and slidably sleeves the delivery tube. When the outer sleeve mechanism is positioned at a far end of the delivery tube, a deformable section of the delivery tube is in a straight state; when the outer sleeve mechanism is positioned at a nearend of the delivery tube, the deformation section of the delivery tube is in a curved state. In addition, the tail end of the outer sleeve mechanism and the cannula handle can be detachably assembled, the delivery tube can be inserted into the operating cannula through the cannula handle, and the deformable section of the delivery tube is capable of extending out from the tail end of the operating cannula. The novel bone filler delivery system can be applied to minimally invasive surgeries such as percutaneous vertebroplasty, a bent portion of the delivery tube can be smoothly sent into the vertebra by a doctor, and the delivery component can be quickly and conveniently withdrawn after injection of bone filler.

The invention discloses a 125I particle-containing kit and application thereof. The kit comprises 125I particles, bone cement polymethyl methacrylate and a contrast agent. A Banna minipig test animal model implanted by percutaneous vertebroplasty is established. By the kit, a relationship between irradiation dose and time of radiation myelitis caused by short-distance irradiation of the 125I particles is discussed. By the kit, spinal metastatic tumor patients are treated and researched; and after implantation by the percutaneous vertebroplasty, curative effect is improved and postoperative complications are reduced compared with those by the pure percutaneous vertebroplasty.