237 results about "Surgical blade" patented technology

An ultrasonic surgical blade includes a body having an external surface, at least one cutting edge, and a distal end. In at least one embodiment, the cutting edge can be defined by first and second surfaces which define an angle therebetween. In various embodiments, at least a portion of the cutting edge comprises a sharp point. In other embodiments, at least a portion of the cutting edge and surface comprise a sharp point and or a beveled surface.

An ultrasonic surgical blade includes an ultrasonic-surgical-blade body having a longitudinal axis, a distal tip, a proximal end adapted for longitudinal ultrasonic vibrational excitation, a most-distal longitudinal vibration node, a treatment portion extending from the distal tip toward the most-distal longitudinal vibration node, and a functional asymmetry. The functional asymmetry is asymmetric about the longitudinal axis and translates longitudinal ultrasonic vibrational movement of the proximal end into a combination of a longitudinal ultrasonic vibration and a transverse ultrasonic vibration in at least some of the treatment portion of the ultrasonic-surgical-blade body. An amplitude of the transverse ultrasonic vibration at the distal tip is less than substantially ten percent of a maximum amplitude of the transverse ultrasonic vibration of the treatment portion of the ultrasonic-surgical-blade body. An alternate embodiment of the ultrasonic surgical blade includes at least one functional asymmetry and at least one balance asymmetry.

Disclosed is an ultrasonic surgical device having a distally/proximally movable fluid management system consisting of single lumen or multiple lumens. The invention provides for the delivery of irrigation fluid or the removal of fluid, debris or vapor from the tissue-effecting portion of the blade while minimizing the loading on the blade. The blades of the surgical device, when excited at a natural blade system frequency, will have modal shapes characterized by longitudinal, transverse and/or torsional motion and will have nodal locations for these motions at positions along the tissue effecting length of the blade. The instrument is designed to allow for the fluid management system to be positioned at one or more motion nodes to facilitate efficient removal of tissue or fluid, which tends to accumulate at such nodes of the ultrasonic surgical blades.

An ultrasonic surgical blade has a blade body and a shank. The shank is fixed at one end to the blade body and is operatively connectable at an opposite end to a source of ultrasonic vibrations. The shank has a longitudinal axis. The blade body is eccentrically disposed relative to the axis.

A connector assembly for connecting a surgical saw blade to a housing of a surgical instrument. The connector assembly allows a surgeon to align, insert and lock the surgical blade in the collet of the surgical instrument without any special tools, and further provides a stable and robust platform for mounting the surgical saw blade thereto. The connector assembly includes a tapered conical shaped sleeve which is positioned within the housing and rotatable in both a clockwise and counter-clock wise direction. A pair of grippers are mounted within the connector assembly and engage the surgical saw blade when the tapered conical shaped gripper sleeve is rotated in a first position. A sternum guard is also mounted to the housing.

The present invention relates to tools and methods for cutting the annulus of a spinal disc. The cutting tools of the invention may be cannulated for use in conjunction with a guide wire. A stop surface of the cutting tool is configured to contact the annulus during cutting to prevent further longitudinal movement of the surgical blade(s) into the annulus, thus limiting the size of the incision(s).

A surgical blade is disclosed for use with a surgical tool for making incisions in the sclera of an eye to form a scleral pocket to receive a scleral prosthesis. The surgical blade comprises a rotatable support arm capable of being rotated by the surgical tool and a detachable curved cutting blade for making incisions in the sclera of an eye. The surgical tool causes the curved cutting blade to advance through the sclera to form an incision having dimensions to receive a scleral prosthesis. When the incision is complete the curved cutting blade is detached from the rotatable support arm. The curved cutting blade is then removed from the incision by pulling the curved cutting blade forward out of the incision. The incision has the exact dimensions to receive a scleral prosthesis.

An ultrasonic frequency surgical dissecting device including a handpiece with a surgical blade that vibrates in a direction transverse to a long axis passing through the handpiece and blade for improved cutting and coagulation

The present invention provides an improved surgical blade and trocar system for accessing the retina and other parts of the eye while doing vitreo-retinal and cataract surgeries, including surgeries for macular degeneration. The eye surgeon uses an improved surgical blade for vitreo-retinal and cataract surgeries having a generally flat, V-shaped, W-shaped, or “extended W” shaped cross-section. Using the improved surgical blade, the surgeon creates a multi-planar, self-sealing surgical wound, first by directing the surgical blade substantially perpendicular to the eye surface, then redirecting the blade to follow the general curvature of the eye globe, and finally redirecting the blade to enter the interior of the eye. The improved surgical blade is used with an improved trocar system having two main parts-a relatively rigid, wide-mouthed outer segment and a generally thin-walled, collapsible plastic polymer or metal mesh sleeve that spans the surgical wound and substantially molds to its contour. The improved surgical blade and trocar system can be adapted for use in either vitreo-retinal or cataract surgeries.

Devices and methods are disclosed for protecting individuals from the sharp ends of medical objects following use on a patient. Such sharp objects include hypodermic needles, scalpel blades, cannulae, trocars, and the like. The invention utilizes a disposable protective cover for the used sharp. The protective cover is designed to surround and embed the sharp in a permanent cover that is blunt and will not permit further puncture or cutting with the sharp. In an embodiment, the protective cover also absorbs any fluids on or in the used sharp and prevents any fluids from escaping the protective cover. The sharp cover is configured to irreversibly lock, once closed. A refillable or replaceable dispenser dispenses the protective covers at points of use. A disposable receptacle receives the used sharp embedded in the protective cover. When the receptacle is full, the entire receptacle may be discarded in a medical waste container.

An ultrasonic surgical shears includes an ultrasonic surgical blade, a clamping arm operable to open and close toward the blade, and a tissue pad attached to the clamping arm. A method for sealing a blood vessel of a patient includes obtaining an ultrasonic surgical shears and positioning the blood vessel between the blade and the tissue pad. The clamping arm is operated to exert an average coaptation pressure on the blood vessel between and including 60 psi and 210 psi. The blade is ultrasonically vibrated to transect and seal the blood vessel.

An ultrasonic surgical blade, and an instrument, having a gain step. The blade body has, in any half wave length of the ultrasonic-surgical-blade body, a first vibration antinode, a vibration node, a second vibration antinode, and a gain step. The gain step is located between the second vibration antinode and the first vibration antinode. The gain step is spaced apart from the vibration node by a gain-step distance greater than 5% of the distance between the second vibration antinode and the first vibration antinode. The instrument includes the blade, a handpiece having an ultrasonic transducer, and an ultrasonic transmission rod whose proximal end is operatively connected to the ultrasonic transducer and whose distal end activates the blade. In one option, the first vibration antinode is the distal tip, and the gain step is located between the vibration node and the distal tip, resulting in an increased active length of the blade.

Ophthalmic surgical blades are manufactured from either a single crystal or poly-crystalline material, preferably in the form of a wafer. The method comprises preparing the single crystal or poly-crystalline wafers by mounting them and etching trenches into the wafers using one of several processes. Methods for machining the trenches, which form the bevel blade surfaces, include a diamond blade saw, laser system, ultrasonic machine, a hot forge press and a router. Other processes include wet etching (isotropic and anisotropic) and dry etching (isotropic and anisotropic, including reactive ion etching), and combinations of these etching steps. The wafers are then placed in an etchant solution which isotropically etches the wafers in a uniform manner, such that layers of crystalline or poly-crystalline material are removed uniformly, producing single, double or multiple bevel blades. Nearly any angle can be machined into the wafer, and the machined angle remains after etching. The resulting radii of the blade edges is 5-500 nm, which is the same caliber as a diamond edged blade, but manufactured at a fraction of the cost. A range of radii may be 30 to 60 nm, with a specific implementation being about 40 nm. The blade profile may have an angle of, for example, about 60°. The ophthalmic surgical blades can be used for cataract and refractive surgical procedures, as well as microsurgical, biological and non-medical, non-biological purposes. Surgical and non-surgical blades and mechanical devices manufactured as described herein can also exhibit substantially smoother surfaces than metal blades.

The present invention relates to methods and apparatus for self-sharpening micro surgical blades, knives and assemblies.

A surgical blade includes a handle with a recess sized to receive the proximal end of a blade assembly. The recess includes a notch as well as opposed facing distal ridges designed to engage elevated surfaces in the blade assembly to maintain the blade assembly and handle assembled. The blade assembly includes a blade portion and a fitting having a protrusion sized to be received in the proximal notch of the recess in the handle when the blade portion is assembled to the handle. The fitting also includes side faces having opposed elevated surfaces obliquely disposed so that they are engaged by the distal ridges within the handle recess. The fitting also includes an upwardly extending catch that engages a distal surface on the handle to assist in locking the blade assembly to the handle. The recess of the handle includes inner tapered surfaces. The side faces of the fitting are tapered to the same degree so that as the fitting is pushed upwardly within the recess, the side faces of the fitting engage the lateral inner surfaces of the recess to provide an interference fit therebetween. A blade removal system permits the blade assembly to be removed from the handle without any danger of cutting or puncturing the fingers or hands of the surgeon. The system includes a container having a removable lid, with the lid having an opening leading to a short passageway receiving the blade assembly. The blade assembly may be inserted into the recess until the fitting engages within a rectangular opening therein. In that orientation, the handle may be pivoted to unlock the blade assembly from the handle.

The invention discloses a cutting edge grinding mechanism for an automatic grinding device of a surgical blade cutting edge. The cutting edge grinding mechanism for the automatic grinding device of the surgical blade cutting edge comprises a grinding wheel, and a first servo motor can drive the grinding wheel to rotate; a second servo motor drives a screw rod to rotate, and the second servo motor can drive the grinding wheel to move forward and backward along sliding rails of a lower partition plate to make the grinding wheel be close to or far away from a cutting edge; a third servo motor can drive a roll-over stand to move horizontally and roll over, so that the third servo motor can drive the grinding wheel to move in the trajectory of the cutting edge of a surgical blade. By means of the cutting edge grinding mechanism for the automatic grinding device of the surgical blade cutting edge, automatic grinding of the cutting edge of the surgical blade can be achieved, the work efficiency can be improved, cutting edges with even sharpness degree can be obtained, and the requirement for high sharpness degree of the surgical blade is met. The invention further discloses the automatic grinding device of the surgical blade cutting edge.