53 results about "Meniscus" patented technology

The invention belongs to the field of image spectrum detection, and particularly relates to a high-precision detection device and method for a liquid meniscus contour in a capillary tube. Comprising a telecentric lens, an industrial camera, a displacement platform, a light source, a capillary tube and a culture dish, the industrial camera, the capillary tube and the culture dish are installed on different displacement platforms respectively, the light source is provided with a rotary telescopic rod and can move in all directions, when the liquid meniscus contour in the capillary tube is shot, the light source, the meniscus of the capillary tube and the industrial camera are adjusted to be aligned to the same horizontal plane, and on the basis of the telecentric imaging principle, according to the light refraction principle, the liquid meniscus contour in the capillary tube is obtained. And deriving a distortion correction function of the meniscus contour in the capillary tube. According to the invention, the industrial camera and the telecentric lens are matched for use, the problem of shape distortion caused by object distance change is avoided, and the difficulty of image distortion correction is reduced. The meniscus contour distortion correction function derived based on the telecentric imaging principle can accurately calculate the actual value of the meniscus contour and restore the actual meniscus contour.

The invention relates to a process and a system for 3-dimentional (3D) fabrication of sub-micron structures and is established by local electrochemical deposition methods.

The invention relates to a light and miniature big-target-surface low-light lens, and the lens comprises a front lens group A, a diaphragm B and a rear lens group C, wherein the front lens group A, the diaphragm B and the rear lens group C are sequentially arranged in an incident direction of an optical path. The front lens group A includes a positive meniscus lens A1, a negative meniscus lens A2,a biconcave lens A3 and a biconvex lens A4, wherein the positive meniscus lens A1, the negative meniscus lens A2, the biconcave lens A3 and the biconvex lens A4 are sequentially arranged in an incident direction of the optical path. The biconcave lens A3 and the biconvex lens A4 are in close connection with each other as a first bonding group. The rear lens group C includes a biconcave lens C1, abiconvex lens C2, a biconvex lens C3, a plano-convex lens C4 and a negative meniscus lens C5, wherein the biconcave lens C1, the biconvex lens C2, the biconvex lens C3, the plano-convex lens C4 and the negative meniscus lens C5 are sequentially arranged in an incident direction of the optical path. The biconcave lens C1 and the biconvex lens C2 are in close connection with each other as a secondbonding group. The invention also relates to an imaging method of the lens. The lens is reasonable in design, effectively improves the imaging quality under the requirement of the large target surfaceof the lens, reduces the number of optical lenses, and realizes light and miniature lens. The lens has strong light collecting and light transmitting ability, and the target surface of the lens is large. The lens is high in optical resolution, is large in angle of view, and is large in observable range.

The full-automatic meniscus cutter comprises a plasma cutter head, a connecting rod, a rotating shaft, a joint insertion rod, a supporting frame and a control system, the plasma cutter head is connected to the front end of the connecting rod and used for cutting lesion tissue of a meniscus, and the rear end of the connecting rod is connected with the rotating shaft; the rotating shaft is rotationally connected to the rear end of the joint insertion rod and is perpendicular to the joint insertion rod, the front end of the joint insertion rod is used for being inserted into a joint cavity and abutting against a joint capsule, a rotating driver used for driving the rotating shaft to rotate is arranged on the supporting frame, and the connecting rod is of a telescopic rod structure and is provided with a telescopic driver used for driving the connecting rod to stretch out and draw back. The control system is electrically connected with the rotating driver and the telescopic driver and used for commanding and controlling the rotating shaft to rotate and commanding and controlling the plasma tool bit to reciprocate front and back. The meniscus cutter has the advantages that automatic cutting and precise cutting are achieved, operation time is shortened, damage to surrounding healthy tissue is reduced, and monitoring and precise control are achieved.

The utility model belongs to the technical field of medical instruments, and relates to a microneedle type meniscus suture device which comprises a handheld handle, an ejector pin and a plurality of loops, the ejector pin is arranged on the handheld handle, the front end of the ejector pin is movably arranged, the loops are sequentially arranged at the front end of the ejector pin in a sleeving mode in the moving direction, the front ends of the loops are sharp, and sutures are arranged between the loops. A one-way limiting structure is arranged between the front end of the ejector pin and the inner wall of the loop, so that the front end of the ejector pin can support the loop and retreat from the loop. Compared with the prior art, the microneedle type meniscus suturing device has the advantages that the operation can be performed with a smaller incision, the postoperative pain is relieved, the recovery time is shortened, and the overall influence of the operation on the body of a patient is remarkably reduced.

The present invention belongs to the field of image spectrum detection, and specifically relates to a high-precision detection method for the contour of the meniscus of liquid in a capillary tube. It comprises a telecentric lens, an industrial camera, a displacement platform, a light source, a capillary tube and a culture dish; the industrial camera, the capillary tube and the culture dish are respectively mounted on different displacement platforms. The light source is provided with a rotating telescopic rod to achieve all-round movement. When photographing the contour of the meniscus of liquid in the capillary tube, the light source, the meniscus of the capillary tube and the industrial camera are adjusted to be aligned on the same horizontal plane. Based on the principle of telecentric imaging and the principle of light refraction, a distortion correction function for the contour of the meniscus in the capillary tube is derived. The present invention uses an industrial camera in combination with a telecentric lens, thereby avoiding the problem of shape distortion caused by changes in the distance between the object and reducing the difficulty of image distortion correction. The meniscus contour distortion correction function derived based on the telecentric imaging principle can accurately calculate the actual value of the meniscus contour and restore the actual contour of the meniscus.

The invention provides devices and methods for dosing a liquid. A channel which ends in an opening of the device, for aspiration and / or dispension of a portion of the liquid through the opening and into the channel in an axial direction is configured for capillary flow of the liquid portion therethrough. The channel is formed along at least a part of its axial extension by a continuous array of, fixed-volume, advancement portions and pinning portions. At an axial boundary between each advancement portion and a respective pinning portion thereof which succeeds the advancement portion in the axial direction a phase guide is formed along an entire circumference of the channel, such that upon advancement of the liquid portion through the channel in the axial direction by capillary flow, a meniscus of the liquid portion at a downstream end of the liquid portion is pinned at the respective axial boundary.

Various aspects of the present disclosure are directed toward methods and apparatuses for interacting a first liquid and a second liquid in one or more fluidic channels of a capillary structure. The methods and apparatuses can include providing at least one capillary barrier that positions a meniscus of the first liquid at a fluid-interface region using capillary forces within the capillary structure. Additionally, a path is provided along one of the channels for the second liquid to flow toward the fluid-interface region. Additionally, gas pressure is released, via a gas-outflow port, from the fluid-interface region while flow of the first liquid is arrested. Further, the first liquid and the second liquid contact in the fluid-interface region with the capillary barrier holding the first liquid at the fluid-interface region.

The invention relates to a targeting device that allows the drilling of precisely located tunnels for performing a two-tunnel technique for refixing a torn root of the posterior horn of the medial or lateral meniscus. The targeting device according to the invention comprises a supporting structure (1 ), an arm (2), a first guide (3) and a second guide (4), wherein the arm (2) is attached by its one end to the supporting structure (1 ) and at its other end the arm (2) comprises a hook (5) terminated by a tip (6), wherein the first guide (3) and the second guide (4) have a cylindrical shape and comprise a cavity passing through the given guide (3,4) along its entire length, wherein the supporting structure (1 ) comprises a first locking mechanism for locking the first guide (3) and a second locking mechanism for locking the second guide (4), wherein the longitudinal axis (7) of the first guide and the longitudinal axis (8) of the second guide belong to the same plane, are oriented centripetally, and their intersection lies in the given plane behind the tip (6) in the direction from the supporting structure (1 ).

1. Name of the product in this design: Artificial Meniscus (Implantable). 2. Purpose of this design: This design is intended for use in meniscus transplantation surgery for patients with meniscus injuries. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

A microfluidic valve may include a first portion of a liquid conduit to contain a fluid, a second portion of the liquid conduit to contain a liquid and a constriction between the first portion and the second portion and across which a capillary meniscus is to form between the fluid and liquid, the constriction comprising an edge along a ceiling of the constriction.

The present invention relates to a porous three-dimensional meniscus scaffold and a biodegradable medical device comprising same. According to the present invention, external force applied to the meniscus scaffold can be more reliably and evenly dispersed by appropriately adjusting a ratio of intervals between fibers inside the meniscus scaffold, and thus the biodegradable medical device comprising the meniscus scaffold has greater structural stability.

This application relates to the field of micro / nano-scale flow measurement technology, and discloses a liquid flow measurement method and apparatus based on capillary interface optical tracking. The method includes: determining edge point cloud data of the gas-liquid meniscus in a capillary during a target detection period; performing circular fitting and geometric parameter calculation based on the edge point cloud data to obtain contact data of the gas-liquid meniscus; wherein the contact data includes the contact angle and the contact position between the gas-liquid meniscus and the inner wall of the capillary; and performing flow correction processing based on the contact data to determine the corrected volumetric flow rate during the target detection period. Its beneficial effect is that by using circular fitting and geometric parameter calculation to generate contact data including the contact angle and contact position, the deformation state of the meniscus is quantified, effectively eliminating the volume measurement deviation caused by the meniscus cap deformation, and significantly improving the accuracy and reliability of liquid flow measurement under ultra-low flow and dynamic changing conditions.

The present application provides a liquid ejecting head and a liquid ejecting apparatus capable of detecting whether the pressure of a meniscus of a nozzle is within a normal range while suppressing an increase in cost and an increase in size. The apparatus includes: a plurality of nozzles that eject a liquid; a plurality of pressure chambers that apply pressure to the liquid for ejecting the liquid from the plurality of nozzles, respectively, the plurality of pressure chambers being arranged in the first direction; a first liquid chamber disposed in a first direction with respect to the first pressure chamber, the first pressure chamber being located at an end of the plurality of pressure chambers in the first direction; a first vibration plate defining a part of the first liquid chamber; and a manifold connected to the plurality of pressure chambers and the first liquid chamber in common, the liquid ejecting head having a strain gauge corresponding to the first diaphragm for acquiring the pressure in the first liquid chamber.

TITLE: LIQUID CONTAINER WITH INTERNAL MENISCUS, METHOD AND DEVICE FOR CONSTRUCTING SUCH A CONTAINER The container (20) for food or pharmaceutical liquid (22) comprises: - a tube (21) made of geometrically defined plastic material, at least at its mouth, for the outside of the tube, by generatrices of a cylinder or a cone called "external" and, for the inside of the tube, by generatrices of a cylinder or a cone called "internal", this tube having a longitudinal axis (27) of rotational symmetry, this tube containing said liquid, and - a lid (25) welded onto the mouth of the tube, this lid extending, towards the outside of the tube, beyond said external generatrices.The weld of this operculum onto the tube includes a meniscus (34) on the inner wall of the tube within the volume defined by the inner generatrices, the volume of this meniscus being at least twice greater than the volume of any meniscus on the outer wall of the tube outside the volume defined by the outer generatrices. (Figure for abbreviation: Figure 1).

A dislocation meniscus reduction device relates to the technical field of medical instruments and comprises a positioning bow, a sheathing canal and a threading needle. The positioning bow is composed of a guide rod and an anchor rod, the guide rod is an arc linear rod piece, the right end of the guide rod is fixedly connected with the right end of the anchor rod, the left end of the anchor rod is located at the arc center position of the guide rod, and a hook tip is formed at the left end of the anchor rod; the guide rod is provided with a sliding seat capable of sliding in the length direction of the guide rod, the sliding seat is in damping fit with the guide rod, the sheathing canal is a straight pipe with two open ends, the sheathing canal is installed on the sliding seat and can slide in the axial direction of the sheathing canal, the sheathing canal is in damping fit with the sliding seat, and the axis of the pipe core of the sheathing canal passes through the arc center of the arc-line-shaped guide rod; the threading needle is a straight tube with two open ends, the threading needle is inserted into the sheath tube in a sliding fit mode, and the length of the threading needle is larger than that of the sheath tube, so that the two ends of the threading needle extend out of the sheath tube.

A microfluidic device includes a device body defining a microfluidic pathway including a first channel, a second channel downstream of the first channel, and a junction including a transition between the first channel and the second channel. The transition is configured to inhibit fluid entering the transition from the first channel from forming a meniscus across the second channel, thereby inhibiting capillary-driven flow into the second channel. The microfluidic device further includes a valve that, when activated while capillary-driven flow of the fluid is inhibited at the transition, induces capillary-driven flow through the second channel by facilitating formation of the meniscus.

To provide a liquid discharge apparatus capable of suppressing occurrence of meniscus collapse and a failure to eliminate thickening of liquid in a nozzle.SOLUTION: A liquid discharge apparatus includes: a liquid discharge head including individual flow paths including pressure chambers and nozzles, a common supplying flow path, a common discharging flow path, and piezoelectric elements provided corresponding to the pressure chambers; and a drive control unit for performing discharge control and micro-vibration control, where the nozzles are configured by coupling a first nozzle portion and a second nozzle portion in a height direction, the second nozzle portion being provided closer to the individual flow paths than the first nozzle portion and having a larger diameter than the first nozzle portion, and where the nozzle satisfies B<20 [μm] and C+D>70 [μm] and the drive control unit is configured to perform the micro-vibration control so as to satisfy C / 3<M<C+D / 2 when A is a diameter of the first nozzle portion, B is a diameter of the second nozzle portion, C is a height of the first nozzle portion, D is a height of the second nozzle portion, and M is a maximum pull-in amount of meniscuses of liquid at the time of the micro-vibration control by the drive control unit.SELECTED DRAWING: Figure 5

A laboratory automation apparatus with a liquid volume measurement functionality comprising a working table, a pipettor comprising a pipetting head with an electrode providing a capacitive sensor with a reference electrode. A robotic arm is configured to move the pipetting head above the working table. A processor is operatively coupled to the robotic arm, to the pipettor and to the electrode by an electronic circuit. A capillary is located on the working table having an opening for receiving a target amount of liquid from the pipettor to form an air-liquid meniscus in the capillary. The robotic arm is configured to hover the electrode over the capillary to detect a change in capacitance related to the position of the meniscus, and the processor is configured to calculate the transferred amount of liquid from the position of the meniscus in the capillary.

A meniscus tear repair sling device has a collagen membrane having a first end portion and a second end portion. The first end portion is configured to pass under a tear in a meniscus and wrap over and above the tear and extend past the meniscus and overlay the second end portion thereby enveloping a portion of the meniscus with a tear and forming the sling device. The first end portion and the second end portion form exposed overlying tails extending external of a knee joint. The tails are configured to be affixed to a portion of a tibia. The tails when tensioned close the tear by providing a lateral strain on the torn meniscus when the tails are affixed to a tibia adjacent the knee joint.

The invention provides a pair of novel occlusal forceps for knee arthroscopic meniscus plasty, and relates to the technical field of occlusal forceps, the novel occlusal forceps for knee arthroscopic meniscus plasty comprises a forceps body, and the forceps body is composed of a front tube and a rear tube; the rotating part is arranged in the front pipe and the rear pipe, a first rack or a second rack is meshed with a first gear by adjusting the mounting part, so that the first driving part pulls the front pipe to move, the front pipe can rotate during moving, the angle between the front pipe and the rear pipe can be adjusted, the meshing part is aligned to the torn part of the meniscus, and the angle between the front pipe and the rear pipe is adjusted. A medical worker holds the second driving part, and the second driving part drives the occlusion part to perform occlusion, so that the torn part of the meniscus can be occluded and taken out from the body, the angular position of the occlusion part can be adjusted according to different positions of a tearing opening, the surgical requirements of various different types of tearing are met, and the medical worker can conveniently use the medical worker. Meniscus plasty can be performed more conveniently, and meniscus fragments can be taken out of the body.

A medial collateral ligament protector for meniscus resection during knee replacement surgery comprises a protector body that is elongated and has a flat cross-section. The rear end of the protector body is straightened and extended to form a handle, and the front end of the protector body is bent in an arc with an arc angle of 2π / 9 to form a shielding portion for shielding the medial collateral ligament. The total width of the front end of the shielding portion is 22-24 mm, and a trapezoidal opening groove is provided at the front end, biased toward the central axis of the protector body, for making way for the meniscus. The trapezoidal opening groove extends backward along the arc of the shielding portion. The groove depth of the trapezoidal opening groove is 20-24 mm, and the groove width of the trapezoidal opening groove is 6-8 mm, which is the large end of the opening. The angle between the oblique sides of the trapezoidal opening groove is 10°. The trapezoidal opening groove divides the shielding portion into a femoral isolation portion and a tibial isolation portion. The width of the femoral isolation portion is 9-12 mm, and the width of the tibial isolation portion is half of the femoral isolation portion.

A system includes an optical sensor having a field of view, and a container configured to hold a fluid. The container is substantially transparent, and is positioned within the field of view of the optical sensor. The system also includes a backdrop positioned within the field of view of the optical sensor on an opposite side of the container relative to the optical sensor such that the optical sensor is configured to acquire an image of the container and at least a portion of the backdrop. The backdrop includes at least one first stripe extending vertically along the backdrop and having a first degree of reflectivity, and at least one second stripe extending vertically along the backdrop and having a second degree of reflectivity substantially different from the first degree of reflectivity.

A liquid ejecting apparatus includes a liquid ejection head, a supply tank, a recovery tank, a supply flow path, a recovery flow path, a pressurizing mechanism pressurizing the inside of the supply tank, and a depressurizing mechanism depressurizing the inside of the recovery tank. A filling period, in which a filling process is performed to fill, with the liquid, a nozzle, the supply flow path, and the recovery flow path, includes a period that is after a meniscus is formed in the nozzle and before the liquid reaches the recovery flow path. In the period, the pressurizing and the depressurizing mechanisms are driven; and in the period, Pt_out>−|Pm| is satisfied, where Pm indicates a pressure at which the meniscus is broken and Pt_out indicates a pressure in the recovery tank.

1. Name of the product in this design: Meniscus Sealing Device. 2. Application of this design: This design is used for suturing, repairing, and fixing the meniscus in medical surgery. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present invention discloses a kind of decellularized meniscus of extracellular matrix high retention and preparation method thereof.The method includes the following steps:(1) biomaterial is subjected to freeze-thaw cycle;(2) the biomaterial after freeze-thaw cycle treatment in step (1) is taken out sequentially through cell elution liquid:A liquid, B liquid, C liquid, D liquid until biomaterial decellularization ends;Wherein when eluting with A liquid, B liquid, C liquid, D liquid, the biomaterial is fixed in container and carried out;Wherein, A liquid is Triton X 100 solution;B liquid, D liquid are PBS;C liquid is the nuclease solution of deoxyribonuclease I and ribonuclease A composition;Cell elution liquid does not contain trypsin;A liquid elution time is 7 days.The decellularization method of the present invention can retain meniscus extracellular matrix components as much as possible while completely removing cell components, provide original ecological microenvironment for cell growth.

A pressure measuring apparatus (10) comprising: a microfluidic chip (20) comprising at least one capillary measurement chamber and a fluid inlet fluidically coupled to the measurement chamber, wherein the measurement chamber and the fluid inlet are configured to permit a stable meniscus between a first fluid and a second fluid to be formed in the measurement chamber when supplying the second fluid via the fluid inlet to the measurement chamber; and a sensing system (90) configured to detect a position and a shape of the meniscus and to determine a pressure in the second fluid based on the position and the shape of the meniscus.