921 results about "Surgical knife" patented technology

An electrosurgical instrument for use in cutting and / or coagulating tissue includes a dielectric material, the dielectric material being positioned in the current pathway between the tissue-treatment regions of first and second electrodes. This can be achieved by providing one or more electrode surfaces coated with a dielectric material having a reactive impedance of less than 3,000 ohms / sq. mm. at 450 kHz. The dielectric coating acts to couple the RF signal into the tissue primarily by capacitive coupling, providing a more even heating of the tissue and the elimination of “hot spot”. Examples of electrosurgical instruments employing such coated electrodes include forceps, scissors or scalpel blade instruments.

An orthopedic surgical device with compound ultrasound vibration that comprises a handpiece, a surgical cutter fixed on the anterior top of the handpiece, and an ultrasound signal generator. Inside the outer casing of said handpiece, there are provided: an ultrasound transducer for transforming the ultrasound signals from said ultrasound signal generator into ultrasound mechanical waves; a horn (or amplitude transformer) for amplifying vibration amplitude of ultrasound mechanical waves generated from said transducer and then transmitting the amplified ultrasound mechanical waves to said surgical cutter to lead to longitudinal vibration of the surgical cutter; a driving motor fixed in the back end of said handpiece for driving said ultrasound transducer and horn to accomplish the movement of swing and rotation; an adapter provided between said driving motor and said transducer for supplying ultrasonic electrical signals generated by said ultrasound signal generator to said ultrasound transducer.

A surgical cutting and tissue vaporizing instrument, also referred to as an electrosurgical instrument, is in the form of a scalpel or scissors. The scalpel has a handle portion and a blade portion mounted on the handle portion. The blade portion has a smaller front section which acts as an active electrode, a larger rear section which acts as a return electrode, and an insulating middle section separating the two electrodes. A plurality of ports and conduits are formed in the blade portion, with the conduits extending through the handle portion, so that saline may be supplied to the handle and blade portions and out of the ports to the targeted area for tissue transection, and so that excess saline may be drawn by suction through other ports formed on the blade portion. The scissors include two cross-pivotally joined blades, each having a tip portion functioning as either an active electrode or as a return electrode. Ports and conduits are formed in each blade to elute saline onto the targeted area for tissue transection and to remove by suction excess saline from the targeted area.

A scalpel is provided having a handle with a longitudinally extending cavity therein, a blade carrier within the cavity and movable longitudinally relative to the handle between an operative position in which a blade carried thereby is exposed for use at an open end of the cavity and an inoperative position in which a blade carried thereby is retracted within the cavity in the handle, and a manually operable slider associated with the blade carrier and passing through a slot in a wall of the handle at an edge thereof, herein termed the top edge. The handle is moulded as a single piece moulding with an integral bridge defining an endless open end to the cavity through which the blade carrier is introduced into the cavity. The slider is formed as a separate part that snap fits to the blade carrier after its introduction through the open end of the cavity to form a blade carrier and slider assembly. “Click stops” are provided in the operative and inoperative positions by tooth and notch formations on the slider and slot. A final innermost permanently locked position is also preferably provided.

The invention relates to a method of regulating the power available at the manipulator of an electronic scalpel so as to make said manipulator adapted to be used to obtain blood clotting, said electronic scalpel being of the kind comprising: at least a mains voltage rectifying circuit supplying rectified and direct voltage to at least a radio frequency circuit adapted to emit as output a current carrier signal at a main frequency set by an oscillator, said current signal feeding said manipulator through a radio frequency transformer, wherein said method consists in applying to the manipulator a wave form resulting from the sum of the carrier wave and a modulating wave of such frequency that the energy transmitted to the tissue to be coagulated is such to raise the temperature of the tissue to be coagulated until denaturation of the fibrinogen contained therein is caused and transforming it into fibrin. The invention relates also to the electronic scalpel carrying out such a method

An ultrasonic surgical system utilizes a digital control system to generate ultrasonic drive current for transducers that are located in a hand piece and are attached to a surgical scalpel or blade in the hand piece so as to vibrate the blade in response to the current. The digital control includes a digital signal processor (DSP) or microprocessor; a direct digital synthesis (DDS) device; a phase detection logic scheme, a control algorithm for seeking and maintaining resonance frequency; and design scheme that allows to regulate current, voltage, and power delivered to an ultrasonic thereby a device. Such system allows the power versus load output curve to be tailored to a specific hand piece, which improves efficiency and reduces heat. Further, the components of the digital system are much less sensitive to temperature variations, thereby allowing it to operate with narrow as needed frequency range around the desired resonance in order to avoid excitation of other resonances. Also, the digital system provides increased flexibility in locating the resonance frequency of the blade and running diagnostic tests. The start of a user initiated diagnostic test that requires movement of the blade is caused by operating two of the system switches, which guards against accidental operation of the blade which could be harmful if in contact with tissue and also generate false diagnostic results. In addition, the system has interlock with an Electrosurgical unit so that it is not effected by the electromagnetic interference generated by that unit.

The present invention is a dual function transfer tray that can be used for either a scalpel or a suturing needle holder with suturing needle. A scalpel slot is formed in the bottom of a relatively deep set of sloped walls. A suture needle cavity is formed above the first slot. However, at a mid-section of the scalpel slot and the half-cylindrical suture needle cavity are opposing and deep V-shaped cutaway sections in the sidewalls with a flat floor section between them. A user need never have to focus their attention for more than a split second to discern the location of the mid-section of the transfer tray. The user's thumb and forefinger are aimed at the V-shaped sidewall openings to grasp a midsection of a supported surgical sharps. The scalpel slot and half-cylindrical suture needle cavity are set relatively deep with respect to top edges of the transfer tray and the to form an open tray to prevent a user from being inadvertently injured by a scalpel blade or a suture needle. In addition, the scalpel cannot be placed in the scalpel slot unless it rests on one of its longitudinal edges, preferably the same one as that of its blade edge. Thus, a user grasping the mid-section of the scalpel handle in the cutaway and flat floor section picks up the scalpel in a ready-to-use position.

The present invention relates to comprehensive systems, devices and methods for delivering energy to tissue for a wide variety of applications, including medical procedures (e.g., tissue ablation, resection, cautery, vascular thrombosis, treatment of cardiac arrhythmias and dysrhythmias, electrosurgery, tissue harvest, etc.). In certain embodiments, systems, devices, and methods are provided for treating a tissue region (e.g., a tumor) through application of energy. In certain embodiments, systems and devices of the present invention find use in combination with other medical devices (e.g., surgical devices, surgical tools; e.g., hemostats, blades, scalpels). In certain embodiments, more than one energy delivery system or device of the present invention may be employed simultaneously or sequentially (e.g., for cutting and coagulation procedures).

An ultrasonic surgical blade that includes a blade body that has a treatment region. At least one indentation can be formed in the treatment region of the blade body wherein each indentation forms a tissue cutting edge with an outer surface of the blade body. The indentation may comprise one or more holes, lumens, grooves or dimples or a combination of such structures. In various embodiments, one or more aspiration lumens are provided in the surgical blade which may ultimately communicate with an aspiration lumen or passage in an ultrasonic surgical instrument.

In a treating apparatus, a forceps body as a treating device is connected to a generator as a control device. The forceps body mainly includes a pair of handle portions, which are used for manipulation by being held by an operator, a pair of jaws provided between the handle portion and the pair of jaws, which are used to coagulate / resect by grasping living-body tissue to be treated and a pair of scissors component members. A heating member, which is a heat generating source as a heat generating portion for applying heat energy to living-body tissue, is embedded at least one of the jaws. A pair of electrode portions, which is a treating energy generator, is provided to the pair of jaws. By supplying bipolar electric surgical knife current between the pair of electrode portions, high frequency current as treating energy is applied to the grasped living-body tissue.

The invention is directed to an electrosurgical device having a shapeable elongate cutting electrode having a free distal end with an exposed length of at least 0.5 inch and secured by its proximal end to the distal end of a handle. The electrosurgical device is designed for use with a high frequency electrosurgical generator which has an output at a frequency of between about 1 MHz and about 10 MHz, preferably about 3 to about 8 MHz. Preferably, the output has an essentially sinusoidal waveform with little harmonic distortion. The methods provide for the enhanced cutting of a variety of tissue including muscular, connective, glandular and fatty tissue. The device is particularly suitable in performing a breast biopsy.

A system and method are disclosed for securing a blade to a blade post or handle base. A handle base is provided with a receiving port that includes a taper or dovetail configuration along a portion of each wall. The receiving port accepts a blade, and a cap is positioned within the exposed receiving port above the blade surface. The sides of the cap are secured within the dovetail sections along each wall of the receiving port and opposite securing ramps engage to secure the blade into position. The blade may be a keratome blade that is intended for opthalmic use, but the system and method can be used in connection with various types of opthalmic and non-opthalmic surgical knives.