摘要:
A surgical instrument including an injection device and a dosing device. These devices are designed such that a predetermined amount of an adhesive or an adhesive containing filler can be injected into a sealing section of the blood vessel. The blood vessel can then be cut at the filled point and is sealed on both sides.
摘要:
An electronic ballast includes a step-up converter, which includes a storage inductor, a diode, an intermediate circuit condenser and a switch element. According to the invention, a current passing through the storage inductor is used in the form of an indicator of turnon and turnoff times of the step-up converter oscillates in a self-exciting manner.
摘要:
A cryosurgical instrument for separating a tissue sample from a biological tissue to be treated, for purposes of biopsy. The cryosurgical instrument includes a probe for bringing a probe head up to the biological tissue and a gas line for supplying cooling gas from a gas source of a cryosurgical apparatus to the probe head. The probe head cools a limited tissue region, by means of the supplied gas, for obtaining a tissue sample. The tissue sample can be separated from the surrounding tissue when frozen onto the probe head. The instrument has a support tube in which the probe is guided and which can be moved relative to the probe in such a way that the surrounding tissue can be supported by means of the support tube during the separating of the tissue sample. The instrument also includes an accelerating device that provides a predefined force for the separating process.
摘要:
The invention relates to a cryosurgical instrument and a method for separating a tissue sample from surrounding tissue of a biological tissue that is to be treated. The cryosurgical instrument comprises a probe for guiding a probe head on to a biological tissue to be treated, and gas conduits for delivering coolant gas, wherein the probe head is designed in such a way that, in order to collect a tissue sample, a limited region of the tissue can be cooled by means of the gas delivered and can be separated from the surrounding tissue in a state in which it is frozen on the probe head. The instrument is intended to permit reliable removal of a tissue sample without damaging the tissue and to ensure a high degree of safety for the patient. To this end, the instrument has a support means in which the probe is guided and which can be moved relative to the probe in such a way that the surrounding tissue can be counter-supported during separation of the tissue sample. The corresponding method carried out by means of the cryosurgical instrument involves separation of a tissue sample from surrounding tissue of a biological tissue to be treated.
摘要:
An electronic ballast includes a step-up converter, which includes a storage inductor, a diode, an intermediate circuit condenser and a switch element. According to the invention, a current passing through the storage inductor is used in the form of an indicator of turnon and turnoff times of the step-up converter oscillates in a self-exciting manner.
摘要:
The invention relates to a floor panel (100), in particular for a laminates floor with a decorative layer and with an overlay paper which has a cellulose layer (10). In order to provide a floor panel (100), which better satisfies the requirements for the overlay film for abrasion resistance and pressing plate protection on the one hand and microscratch—or chafe resistance on the other hand the invention proposes that coarse corundum particles (15) lie on the underside of the cellulose layer (10), i.e. on the side of the cellulose layer (10) facing the decorative layer, and fine corundum particles (13) lie on the upper side of the cellulose layer (10), i.e. on the side of the cellulose layer (10) facing away from the decorative layer.
摘要:
The invention relates to an electronic ballast presenting an input capacitor and comprising and step-up chopper for operating a load, for example a discharge lamp, on a phase control dimmer having an integrated or parasite inductance. In such a way, the voltage overshooting on the input capacitor are reduced by active charge or discharge thereof.
摘要:
The invention relates to a circuit arrangement for operation of a discharge lamp (EL) with an inverter (INV) which generates a high-frequency alternating current from an input voltage and with a tuned circuit provided with at least one choke (L) and at least one tuned capacitor (C3, C4), by means of which the lamp (EL) is supplied, whereby at least one tuned capacitor (C4) is connected in series with a switch element (T1) parallel to the lamp (EL). The resonance capacitance for control of the lamp can be varied by switching in or out the tuned capacitor. For example, the resonance capacitance can be increased for pre-heating and reduced on lamp operation.
摘要:
The invention relates to a HF surgical instrument for treating, in particular, for cutting and coagulating biological tissue by means of a HF current. The HF surgical instrument comprises a HF generator for supplying a HF current to a cutting electrode and comprises at least one control device for interrupting a HF current circuit. The design of this HF surgical instrument is improved in that a cutting capacity is enhanced. In addition, the control device comprises a current monitoring device that detects the amplitude of the HF current and then generates a first switch-off signal when the HF current decreases over a defined period of time and/or the HF current falls below a threshold value characterizing a state of the treated tissue. The control device also comprises an electric arc monitoring device, which then generates a second switch-off signal when an electric arc occurs between the cutting electrode and the tissue. The control device is designed in such a manner that the HF current circuit is interrupted in response to the first switch-off signal or the second switch-off signal.
摘要:
The invention concerns an electrosurgical instrument comprising two articulated branches, which can be actuated in the manner of a squeezing tool. The instrument further comprises electrode parts at the distal ends of the branches for grasping tissue and for conducting a coagulating current through the tissue in order to cause it to coagulate as well as current-supplying devices for supplying the coagulating current to the electrode parts from an HF generator. At least one device for preventing a short circuit is arranged and configured on the electrode parts in such a way that the electrode parts are unable to touch.