Medical high-frequency composite cable

FIELD: medicine.

SUBSTANCE: medical high-frequency composite cable contains two power mains: high-frequency one for electrosurgical unit connection and another one for data transfer. The cable contains a multiwire centre conductor, a porous fluoroplastic insulation of the centre conductor whereon there are three multiwire information conductors with thin-walled continuous fluoroplastic insulation coiled at an angle 120 degrees to each other in relation to the cable centre, pressed to said insulation of the centre conductor by a winding made of porous fluoroplastic film and silicon-rubber coating.

EFFECT: higher noise immunity between high-frequency and information mains in the cable with ensured higher flexibility and light load of the cable.

2 cl, 2 dwg

 

The invention relates to the field of radiosurgery, in particular to medical high-frequency combined cable designed for transmitting high-frequency energy to the electrosurgical tool in the process of radio transmission during the operation of the information about the change in the value of the electrical characteristics of the tissue in the immediate area electrosurgical effect.

Area electrosurgical effect is part of the wound that is exposed to the high-frequency current by means of an electrosurgical instrument.

In the common case, the cable radiosurgery is made in the form of three twisted conductors with solid insulation in a common shell. One of the stranded conductors of the cable used for the transmission of high frequency energy to the electrosurgical tool. Two other conductor used as an information pair. Because the conductors are in close proximity to each other, between them there may be large electromagnetic effects. Examples of such cables where the conductors are in close proximity to each other, can serve as the cables described in patents JP 9231837, FR 2769120, US 6791026, US 6841734 and others. Advantages radiosurgical method is the use of high-frequency p of the row of 2.64 MHz, which minimizes heating of the tissue in the area of the section.

The aim of the invention is to increase the noise immunity between high-frequency and data transmission lines in the cable while providing increased flexibility and low mass cable.

Figure 1 shows the proposed design of medical high-frequency composite cable. The cable includes a flexible center conductor 1, the porous fluoropolymer insulation 2 of tape, three flexible information wires 3 arranged at an angle of 120 degrees to each other relative to the center of the cable and pressed to isolate the 2 shell 5 made of silicon rubber and the winding 6 of the porous fluoropolymer film. The conductors 3 are thin-walled insulation 4 securing the conductors 3. The diameter information of the conductor 3, the Central conductor 1 and isolate 2 are in the approximate ratio 1:1.5:12.

A concrete example of the requested cable may be a cable that has a center conductor made of seven soft copper tinned wire with a diameter of 0.12 mm Insulation is made by winding of the porous fluoropolymer film marks f-4D-PC. The diameter of the insulation equal to 2.8 mm. Information conductors made of seven soft copper tinned wire with a diameter of 0.08 mm Insulation information submariners has a thickness of 0.13 m and is made of Teflon brand 4MB-K. Information wire is wound with a pitch of 70 mm, They are wrapped in a film f-4D-PC. The cable sheath is made of silicon rubber stamps K-1520. Outer cable diameter of 5.3 mm

Figure 2 shows a possible wiring of the claimed cable. The Central conductor 1 is intended for connection to the electrosurgical tool 7 to the high-frequency generator 10. One of the information conductors 3 is a signal 12, the other two 13 connected together, grounded. Radiofrequency current J produced by the high frequency generator 10, through the Central core of the cable 1 is fed to an electrosurgical instrument 7 which is radiosurgical impact on patient 8, is supplied to the electrode plate 9 and then closes on the high-frequency generator 10. The information about the change in the value of the electrical characteristics of the tissue in the area of the electrosurgical effect is recorded by the sensor 14 and is supplied to the evaluation unit 11 and the signal 12 13 and grounded conductors of the cable.

1. Medical high-frequency combined cable containing two transmission lines electric power: one high frequency to connect the electrosurgical instrument, the other for the transmission of information, the cable contains a stranded Central wire is to, porous fluoropolymer insulation center conductor, over which is wound three multiwire information conductor thin solid fluoropolymer-insulated, spaced at 120° to each other relative to the center of the cable, pressed to the exclusion of the Central conductor of the winding of the porous fluoropolymer film and a shell made of silicon rubber.

2. The cable according to claim 1, characterized in that the diameters of the information of the conductor, the center conductor and insulation center conductor are in the ratio 1:1.5:12.



 

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