648results about How to "Reduce the difficulty of surgery" patented technology

The invention discloses a microcirculation resistance index calculation method based on a radiography image and a hydrodynamics model. The method comprises steps of selecting coronary artery images oftwo positions to carry out segmentation so as to obtain a coronary artery center line and a diameter; generating a coronary artery three-dimensional mode; acquiring blood conduction time Tmn and thespeed; establishing a blood vessel three-dimensional network; based on the coronary artery center line and the diameter of the X-ray reconstruction, generating an axially symmetrical two-dimensional plane mode; then, establishing two-dimensional axially symmetrical grids; measuring aorta mean blood pressure Pa; based on the obtained blood flow speed and the generated blood vessel three-dimensionalnetwork, solving fundamental formula of incompressible flows, and calculating the pressure drop deltaPi of each point from the entrance to the downstream along with the blood vessel center line, wherein the coronary artery far-end artery pressure Pd=Pa-deltaPi; and calculating the microcirculation resistance index IMR=Pd*Tmn. According to the invention, there is no need to carry out measurement through pressure guide wires, so operation is simple; operation difficulty and risk are greatly reduced; and the method can be clinically promoted and applied in large scale.

The invention relates to a microscopic surgical operation navigation system based on augmented reality and a navigation method. The navigation system comprises a fixing frame, a graph mark, a camera, a controller and display equipment, wherein the fixing frame comprises a foundation, a connection member, a fixing rod and a supporting board. The navigation method comprises steps that, S1, the fixing frame is fixed on an ill body; S2, the fixing frame and the ill body are scanned through a CTA, and a three-dimensional model is reconstructed; S3, a three-dimensional coordinate of the three-dimensional model is adjusted through software 3ds MAX to make the graph mark be at the world coordinate center; and S4, the three-dimensional model is projected by ARToolkit software onto a right center of the graph mark, so the three-dimensional model and the ill body image are superposed and fused. The system and the method are advantaged in that, the augmented reality technology is utilized, so the real world information, namely the ill body, is superposed and fused with virtual world information, namely the three-dimensional model of blood vessel muscle bones, so entity information which is difficult to experience in the real world can be acquired by operation doctors.

The invention relates to a 3D printing-based personalized cranial particle implantation guide system, including a head-fixed vacuum pad, particle implantation planning software, a personalized skull perforation template, a personalized particle implantation puncture template, template making and Printing software, 3D printer. The skull perforation template of the present invention is used in conjunction with the particle implantation puncture template, so that the intersection point of each particle implantation needle body is at the perforation of the skull, and the puncture needle passes through the skull smoothly, and the particle implantation needle column of the template can accurately guide the puncture needle. The puncture direction avoids blood vessels and important central nerves, accurately punctures to the lesion, reduces the difficulty of the operation, shortens the operation time, and reduces the risk of the operation.

The invention discloses an intravascular stent of a composite structure; the intravascular stent comprises a stent main body, wherein the distal end of the stent is restrained as an adducted form by virtue of a tightening wire, and the tightening wire is degradable magnesium alloy or degradable iron alloy; one or more auxiliary wires are woven on the stent main body; when the stent is applied to blood vessel of brain, the auxiliary wire is pure platinum or alloy thereof, pure gold or alloy thereof, pure tungsten or alloy thereof, or pure tantalum or alloy thereof; and when the stent is applied to peripheral blood vessel, the auxiliary wire is cobalt-chromium alloy or stainless steel or tungsten or tantalum. The stent, when serving as a thrombus removal system for treating cerebral apoplexy, not only can be used for removing thrombus effectively for several times but also can be used for catching small thrombus flowing to distal end so as to prevent distal blood vessels from getting blocked; and the stent can be used for dilating stenosis or blocked brain blood vessel or peripheral blood vessel, so as to take an effect of dredging and reconstructing a blood flow. The stent can be repositioned and released, with high controllability; and the stent can be used for reducing operation difficulty and greatly improving an operation success rate.

The invention provides an anastomat for gastrointestinal tract anastomosis surgery and a production method thereof. The anastomat comprises an anastomosis nail and a base and is divided into two types, namely a combined type and an independent type. The anastomat is composed of degradable materials and medical barium sulfate and can be finally disintegrated to be powder to be removed from the body after being used up. An envelope is formed on the outer surface of the anastomat through polyacrylic resin and contains medicines such as sulfonamides and quinolones antisepsis and anti-inflammation medicines and adrenobazonum, dicynone and other hemostasis medicines, and the envelope can selectively perform medicine slow release and controlled release according to different pH physiological environments of gastrointestinal tracts.

The invention discloses a sheath-core for conveying an interventional device and a conveying system with the sheath-core. The sheath-core comprises a core tube, wherein a guiding tip and an interventional device fixing tip are fixed at the far end of the core tube, a mounting section for accommodating a device to be implanted is arranged on the core tube between the guiding tip and the implanting device fixing tip; a tube wall thickening layer is arranged on the periphery of the mounting section. The conveying system comprises a sheath tube, and the sheath-core which is arranged in the sheath tube and used for conveying the interventional device. The sheath-core for an interventional operation can be used for preventing the conveying system from bending in the forwarding process, and is high in safety. According to the conveying system, the bending direction controllability of the far end of the sheath tube can be improved, and a doctor can conveniently bend the far end of the sheath tube and move the far end of the sheath tube to a target direction or site through a traction wire, so that the operation difficulty can be lowered.

The invention relates to a method for preparing bionic laminated cartilage/bone element, wherein it comprises preparing porous same heterogenous bone or different bone elements; preparing artificial cartilage and laminated cartilage/bone composite. The invention processes the bone into needed size and shape, to be washed and immunity treatment, to be put at the bottom of mould; then at positive and passive pressures, pouring the polyvinyl alcohol/biological active component preformed element and polyvinyl alcohol/lubricant molecule preformed element into mould; flattening the surface and compressing; freezing and fusing, shaping. The inventive product has surface layer as abrasion-resistant lubricant layer, middle layer as force layer, and bottom layer as biological active cartilage/bone combine layer, to meet biological physica property and physiological function.

An intraoperative stent system, comprising an artificial blood vessel portion (4) and a main stent portion (5) sutured together with the artificial blood vessel portion (4); the intraoperative stent system also comprises a side branch stent portion (6), the side branch stent portion (6) transversely extending outward from the artificial blood vessel portion (4) or the main stent portion (5), and connecting to and communicating with the artificial blood vessel portion (4) or the main stent portion (5). The intraoperative stent system saves operation time and reduces operation difficulty.

The invention discloses a modeling method of a necrosis caput femoris restoring model based on an umbrella-shaped caput femoris supporter. The modeling method comprises the steps that firstly, a three-dimensional model of a to-be-restored caput femoris is obtained, wherein the NURBS curved surface model of the to-be-restored caput femoris is obtained, the to-be-restored caput femoris is a caput femoris which exists in the thigh tissue necrosis area and is pre-restored by the caput femoris supporter, and the caput femoris supporter is composed of an umbrella-shaped supporter body and a supporting sleeve; secondly, the necrosis area needing to be separated is determined according to the shape of the umbrella-shaped supporter body, and a necrosis caput femoris model is established; thirdly, a caput femoris supporter model is established; fourthly, a necrosis caput femoris implantation model is established, wherein the necrosis caput femoris implantation model with an implantation channel and a three-dimensional model of an implanted bone are established; fifthly, the necrosis caput femoris restoring model is established. The modeling method is simple in step, reasonable in design, convenient to achieve and good in using effect, the restoring model of the caput femoris supporter implanted into the necrosis caput femoris can be easily, conveniently and quickly established, and the quality of the established restoring model is high.

The invention provides a left atrial appendage occlusion device which comprises a left plate surface and an outer plate surface. The inner plate surface and the outer plate surface are braided by shape memory silk threads. The centers of the inner plate surface and the outer plate surface are connected through a connecting part. The connecting part is a prefabricated rod. The inner plate surface and the outer plate surface are respectively fixed at two ends of the connecting part. A flow choking membrane is disposed in each of the inner plate surface and the outer plate surface. A connector is disposed on the outer plate surface. Preferably, the inner cavity of the connecting part is communicated with the through hole of the connector to form a conveying passage. The left atrial appendage occlusion device has the advantages the device is implanted from the outer side of left atrial appendage in an minimally invasive manner, a doctor can see the left atrial appendage directly, surgery process is simplified, surgery safety is increased, and the pains of a patient is greatly relieved; due to the fact that the device is provided with the conveying passage, medicines or development agents can be injected into a human body conveniently during a surgery.

The invention relates to the field of medical science, and particularly relates to an anterior cruciate ligament stopping location and ligament tunnel location device combining with preoperative 3D planning information. The device comprises hardware such as a C-type arm X-ray machine, a gama correction calibration board, an image capturing card, a positioning robot, a path positioning rack, a position trailing platform, and a computer as well as software such as a 3D planning module and a 2D positioning and navigation module which are stored in the computer. The 3D planning module makes use of preoperative 3D image data of knee joints of a patient, assists a doctor in finishing personalized surgical planning, and projecting a 3D environmental message to a 2D navigation message along a specific projection direction. The 2D positioning and navigation module makes use of a 2D medical image in surgical space collected by the hardware as well as location information of various trailing objects and combines the 2D navigation message to construct a navigation environment to control the hardware such as the positioning robot and the path positioning rack to finish an accurate operation path positioning. The anterior cruciate ligament stopping location and ligament tunnel location device can assist the doctor in finishing the precise and personalized operation of anterior cruciate ligament stopping location and ligament tunnel location, thus lowering operative difficulties and enhancing operative treatment efficacy.

The invention provides a valve clamping device and a valve clamping system. The valve clamping system comprises the valve clamping device and a pushing device; the valve clamping device comprises a pushing rod, two or more clamps, one or more extension arms, and a driving assembly for driving the clamps to be opened and closed and driving the extension arms to stretch out and draw back; and each clamp comprises a first clamp arm and a second clamp arm which can be relatively opened and closed, and the one or more extension arms are arranged on the surfaces of the first clamp arms in stretchingout and drawing back modes. The extension arms capable of stretching out and drawing back are arranged on the surfaces of the first clamp arms of the valve clamping device, the extension arms stretchout of the first clamp arms while the first clamp arms are opened relative to the second clamp arms of the valve clamping device, the length of the first clamp arms of the clamps is increased equivalently, the long first clamp arms can support valves well when capturing the valves, the valves are prevented from slipping from the surfaces of the first clamp arms, thus the movable valves can be quickly captured, the surgery difficulty is lowered, and the surgery efficiency is improved.

A steel plate for funnel chest orthopaedic surgery includes a supporting plate (1), a fixing piece (2), a telescopic fixing piece (3), a guiding head (4) and screws (6). The supporting plate (1) is an elongate steel plate. One end of the supporting plate (1) is designed to be integrated with the fixing piece (2), and the other end is provided with a size-adjusting strap (5). The telescopic fixing piece (3) is an elongate steel plate with the same width as that of the supporting plate (1). One end of the telescopic fixing piece (3) is designed to be integrated with the fixing piece (2), and the other end is provided with a groove. The guiding head (4) is an elongate steel plate with the same width as that of the supporting plate (1). One end of the guiding head (4) is provided with a hook, and the other end is provided with a groove.

The invention discloses a coupled full-intervertebral joint system, which possesses little oligodynamic joint between upper and lower intervertebral end-plate on the spine, wherein one little oligodynamic joint is set between each little joint position on two sides of upper and lower intervertebral or upper and lower crests; one end of little oligodynamic joint is fixed on the vertebral arch root or crest of upper vertebral bulk with the other end fixed on the vertebral arch root or crest of lower vertebral bulk; the joint system is composite joint system with intervertebral little oligodynamic joint and little oligodynamic joint, which replaces lateral joint to support vertebra to avoid joint from degenerating and hardening effectively.

The invention relates to brackets, a bracket delivery system and a kit. The main bracket delivery system comprises a main delivery catheter and the main bracket, the main delivery catheter comprises an outer catheter and an internal catheter which are coaxially arranged, the outer catheter has a proximal end part, a distal end part and a first hollow cavity body, and the inner catheter extends inthe first hollow cavity body of the outer catheter; the main bracket capable of being released in a delivery structure type is kept in the portion, between the outer catheter at the proximal end of the main delivery catheter and the internal catheter, in the first hollow cavity body; the main bracket delivery system is characterized in that the main bracket is a bare bracket and comprises a main bracket body and a main passage enclosed by the main bracket body, and one or more openings are distributed in the main bracket body. The invention further relates to the kit comprising the main bracket delivery system and the main bracket. The delivery system and the kit are used for accurate locating and quick replacement of the main bracket and the branch bracket in the aortas, and standard production of the main bracket can be achieved.

A knee joint prosthesis with functions of the elastic meniscus comprises a thighbone component; the thighbone component comprises a tibia component; the tibia component comprises a tibial plateau and a tibial tray; an elastic part with functions of the elastic meniscus is arranged between the tibial plateau and the tibial tray and is in contact with the bottom of the tibial plateau; the elastic part can be an elastic pad; the elastic pad is matched with the space which is positioned between the tibial plateau and the tibial tray and capable of accommodating the elastic pad in shape and size; a limit post is arranged below the tibial plateau; a positioning hole is formed on the elastic pad and in a position corresponding to the limit post; and the limit post passes through the positioning hole to be fixed in a clearance fit with an inner hole of a fixing post on the tibial tray. Since the elastic material or part (namely the elastic part) is additionally arranged between the tibial plateau and the tibial tray to simulate the functions of the natural meniscus, the following effects can be achieved that the operation difficulty during operation can be reduced; a favorable buffer can be provided for the knee joint after operation; oscillation conveyed among the joints can be absorbed; abrasion can be reduced substantially; the flexion range of the knee joint can be expanded; and compared with a traditional knee joint prosthesis, the knee joint prosthesis provided by the utility model can improve physical performance of the lower limbs of a human body.

The invention discloses a catheter of composite structure. The catheter comprises a high-molecular pipe on the outer layer, a tubular woven net or spring net on the middle layer and a smooth inner layer. The high-molecular pipe on the outer layer is made of nylon, nested polyetheramide elastomer, polyurethane or silicone rubber; the wall thickness of the far end of the woven net or spring net on the middle layer is smaller than or equal to the wall thickness of a woven net body or spring net body; the inner layer is made of polytetrafluoroethylene or high-density polyethylene or nested polyetheramide elastomer containing a friction coefficient reducing additive. Compared with a conventional plastic catheter, the composite catheter has the advantages that the same mechanical performance requirement is met, and the wall thickness can be greatly reduced; the passing performance, folding resistance and controllability of the composite catheter are greatly improved, the composite catheter can be pushed to deeper and smaller blood vessels under the same conditions, and the operative successful rate is increased.

The invention relates to a thoracic aorta covered stent, which is used for treating aneurysm of thoracic aorta and dissecting aortic aneurysm in minimally invasive surgeries. The thoracic aorta covered stent comprises a cover and a stent composed of a plurality of cylindrical single rings, wherein the cover is adhered to the stent to form a tubular cover; the plurality of cylindrical single rings are in wave patterns; a supporting frame is arranged at the near end of the stent; and each cylindrical single ring comprises a first type cylindrical single ring and a second type cylindrical single ring which are distributed at intervals on the tubular cover; the amount of the waveforms of the first type cylindrical single ring is not less than that of the second type cylindrical single ring; and the waveform of the first type cylindrical single ring is less than that of the second type cylindrical ring.