RU93257U1 - RADIO ELECTRODE - Google Patents

Abstract

 A radio wave electrode, characterized in that it contains a metal rod coated with insulating material with a length of 50 cm, a tungsten needle and a stopper are placed at the distal end, and a handle with a marking of the position of the cutting needle connected to the radio wave generator is located at the proximal end.

Description

The utility model relates to medicine, namely to thoracic surgery and can be used in the treatment of patients with tracheal stenosis.

In thoracic surgery, electrocoagulation loops, button-shaped or needle electrodes are used for endoscopic dissection of cicatricial stenosis of the trachea. The disadvantage of these tools is the presence of contact with the tissue, which causes the formation of soot and welding of the electrode to the tissues, and when the electrode is removed, the scab breaks off often, which can lead to bleeding. (V.D. Parshin "Surgery of Cicatricial stenosis of the trachea" M. 2003, p.116; M.A. Rusakov "Endoscopic surgery of tumors and cicatricial stenosis of the trachea and bronchi" M. 1999, p.22-26; N.E. Chernekhovskaya "Modern technologies in endoscopy" M. 2004, p. 82-85).

To expand the stenotic area of the trachea, YAG neodymium lasers are used, radiation to the pathological focus is transmitted through a fiber optic fiber with an outer diameter of 1.8 mm. The disadvantage of these lasers is the need for air or gas cooling of the optical fibers, without which the latter quickly fail, sometimes ignite, it is difficult to carry out layered, surface and depth-controlled exposure, the presence of even a small amount of blood in the surgical field screens the radiation and complicates the work. After laser exposure, an extensive zone of necrosis occurs, which is associated with the deep damaging effects of the YAG neodymium laser, the wound surface heals for a long time, and the length of the stenosis increases.

(Chereshkin D.G. et al. “Laser endoscopic surgery of the upper respiratory tract” M.1990; Ovchinnikov A.A., Masychev V.I. “Comparative evaluation of the use of Nd: Yag-, LBO / Nd: Yag-, Ho : Yag and CO2 lasers in endosurgery of cicatricial stenosis of the trachea / Tez.scientific-practical krnf. “Prevention, diagnosis and treatment of cicatricial stenosis of the trachea.” M. 1999. - S. 36-38; A. Dotsenko and etc. "The use of endoscopic laser and electrosurgical interventions in breast surgery" // Thoracic and cardiovascular chir. - 1991. - P.16-17; V.D. Parshin "Surgery of cicatricial stenosis of the trachea" M. 2003, S. 114-116.)

The objective of the utility model is to create a tool for non-contact dissection of scar tissue of tracheal stenosis using a radio wave.

The problem is solved in that the radio wave electrode contains a metal rod coated with insulating material, 50 cm long, at the distal end of which a tungsten needle and a stopper are placed, and at the proximal end there is a handle with a marking of the position of the cutting needle connected to the radio wave generator. The proposed device is schematically shown in the figure, where: 1 - the tool shaft 2 - the outer insulating coating, 3 - the tungsten needle, 4 - the handle with the mark of the position of the cutting needle, 5 - connection with the radio wave generator, 6 - the position limiter of the tungsten needle.

The tool shaft is a metal conductor 13 mm in diameter 50 cm long and is coated externally with insulating material 2. Thanks to the rigid frame, precise control of the tool during manipulation and use without a fibro-bronchoscope are possible. At a distance of 10 mm from the distal end of the tool is a tungsten needle 0.8 mm in diameter 5 mm long, protruding perpendicular to the axis of the rod from the insulating layer 2. On the distal part of the tool there is a stop due to which there is no contact of the tungsten needle with the fabric, the length of the stop is 7 mm , diameter 3 mm. In the proximal part there is a handle 4 made of silicone with the position mark of the tungsten needle 3. Using connection 5, the instrument is connected to a radio wave generator. Use the tool with rigid tracheoscopy through the tube of the rigid bronchoscope. The rigid design of the handle, rod and needle allows you to control the position of the radio wave, visually orienting yourself in the field of view of the rigid bronchoscope and the mark on the handle, and the limiter prevents the tungsten needle from contacting the fabric, thus the tissue does not stick to the cutting part of the electrode. The device is used as follows.

The trachea is intubated with a rigid rigid bronchoscope tube, down to the level of stenosis. The instrument is introduced into the tube and its distal part is carried out beyond the stenosis zone, the tissue is touched by the limiter, pulling the instrument toward itself, an incision is made. The radio wave incision is carried out using heat, which is formed in the tissues when directed high-frequency waves emanating from the active electrode pass through them. Thanks to this heat, the intracellular fluid “boils” and breaks the cell membrane. In this case, there is no direct contact of the electrode with tissues, the destruction concerns only those layers that perceive a narrowly directed radio wave. Thus, in contrast to electrosurgical instruments and laser radiation, working with a direct effect on the tissue, a radio wave incision is carried out without burns and necrosis of the surrounding layers. Thanks to the limiter, there is no contact of the tungsten needle of the instrument with scar tissue of the stenosis. The proposed device eliminates the listed disadvantages of the known devices.

Claims (1)

A radio wave electrode, characterized in that it contains a metal rod coated with insulating material with a length of 50 cm, a tungsten needle and a stopper are placed at the distal end, and a handle with a marking of the position of the cutting needle connected to the radio wave generator is located at the proximal end.