RU132337U1 - MONOPOLAR ELECTROSURGICAL INSTRUMENT FOR MINI-ACCESS - Google Patents

Abstract

A unipolar electrosurgical tool for mini-access, consisting of an ergonomic handle with an aspiration device and an assembly for connecting the EHF generator and an electrode barrel fixed in it, including a dielectric coating and a working tip at the distal end, characterized in that the working tip has a double curvature surface and release nanoscale titanium coating, in turn, the barrel of the electrode has an angle of inclination relative to the axis of the handle, which is 155 .

Description

The utility model relates to the field of medical technology, namely to electrosurgical instruments for coagulation and can be used for cholecystectomy from the mini-access to coagulate the gallbladder bed.

A monopolar electrosurgical instrument (USA - “tyco”) is known in the art. The instrument consists of an electrosurgical pen (electrode holder) and a working insert (electrode). The Opti reusable electrosurgical pen is designed for interchangeable laparoscopic inserts with extendable and non-extendable Opti electrodes. The tool performs coagulation and dissection of tissues, aspiration and irrigation. On the handle body are switches for aspiration / irrigation. Cable for connecting the EHF generator (high-frequency electrosurgical generator) and two pipes made of polymer material for connection to an aspiration-irrigation device located on the proximal side of the handle. Extendable electrodes are located inside hollow working inserts 280 mm long. The design of the working inserts is non-separable. Work inserts are delivered in a sterile form and are intended for single use.

The disadvantages of such a tool include:

- is a tool for single use;

- high price;

- low efficiency of the aspiration procedure, because the effective cross section of the inner channel is partially occupied by the electrode.

The closest technical solution to the claimed one is a monopolar electrosurgical instrument (RF patent No. 2428949, published September 20, 2011), consisting of a handle with ECHF generator connection nodes located on it, an irrigation-aspiration device and an electrode barrel fixed in it, including dielectric coating and a working tip at the distal end, characterized in that the dielectric coating is made in the form of a removable screen located coaxially and on top of the barrel with the possibility of its longitudinal moving with the help of the control along the barrel to completely overlap the exposed working tip.

The disadvantages of such a tool include:

- limitation of visibility when performing surgical operations from minilaparotomic access in view of the absence of a tilt angle characteristic of mini-access instruments;

- lack of release coating on the working surface (soot formation on the working surface of the tool).

- a small area of the working surface increases the amount of exposure to the tissue;

- uncontrolled coagulation depth (burning tissue of the liver, failure of the electrode) due to the small area of the electrode.

The objective of the utility model is the creation of a device devoid of the disadvantages of the prototype, namely, the creation of a monopolar electrosurgical instrument for mini-access with improved performance.

The problem is solved due to the fact that a unipolar electrosurgical tool for mini-access is proposed, consisting of an ergonomic handle with an aspiration device and an EHF generator connection unit and an electrode barrel fixed in it, including a dielectric coating and a working tip at the distal end. Moreover, the working tip has a double curvature surface and anti-adhesive nanoscale titanium coating. In turn, the barrel electrode has an angle of inclination relative to the axis of the handle, which is 155 degrees.

The technical result of the utility model is that:

- reduced the amount of exposure to tissue due to an increase in the area of the working surface, which in turn reduces the depth of electric burn damage to the affected tissue;

- due to the angle of inclination of the electrode barrel from the handle, the visibility of the surgical field is improved, which allows better visualization of the coagulation area during operations from the mini-access;

- due to the presence of anti-adhesive nanoscale titanium coating on the working surface there is no adhesion of tissues (soot formation).

Figure 1 shows a General view of the tool, figure 2 is a side view in section.

The tool contains an ergonomic handle 1, with an aspiration device 2 on it and a connection point for the EHF generator 3, and an electrode barrel 4 fixed therein, covered with a protective dielectric coating 6, reaching the working tip 5 at the distal end of the tool. In turn, the working tip 5 of the barrel of the electrode 4 has a double curvature surface and is coated with a release adhesive nanoscale titanium coating. The barrel of the electrode 4 is inclined relative to the axis of the handle 1, and this angle of inclination is 155 degrees.

The device is used as follows.

During the operation, HEMD (cholecystectomy from the mini-access) after removal of the gallbladder using the proposed tool produce coagulation of the bed of the gallbladder. Through the access for HEMD, the electrode barrel 4 is carried out, while due to the presence of the tool tilt angle (155 degrees), the handle 1 is outside the surgical field, which improves the visibility of the coagulated surface. Work tip 5 is brought to the bleeding area of the gallbladder bed. A high-frequency current is supplied from the EHF generator 3 to the working tip 5 of the instrument, while the bleeding surface coagulates. As a result of coagulation, smoke appears, which, with the help of the suction device 2, enters the hollow part of the electrode and is removed through the connection for the suction device 2. After stopping the bleeding, the instrument is removed, the wound is sutured in layers.

Clinical example 1. Patient C., 55 years old, was operated on for chronic calculous cholecystitis. Operation - cholecystectomy from the mini-access. After cholecystectomy, coagulation of the bed with the goal of hemostasis was performed by the claimed device, which allowed to reduce the time of surgery. The postoperative period was uneventful. The patient was discharged in satisfactory condition.

Claims (1)

A unipolar electrosurgical tool for mini-access, consisting of an ergonomic handle with an aspiration device and an assembly for connecting the EHF generator and an electrode barrel fixed in it, including a dielectric coating and a working tip at the distal end, characterized in that the working tip has a double curvature surface and release nanoscale titanium coating, in turn, the electrode barrel has an angle of inclination relative to the axis of the handle, which is 155 .

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