SU1463285A1 - Apparatus for thermocoagulation of biological tissues - Google Patents

Abstract

This invention relates to ophthalmology and is intended to coagulate the biological tissues of the eye and its appendages. The purpose of the invention is to reduce injuries by improving the accuracy of dosing of thermal effects on a local area of biological tissue. The device contains a needle connected to an automatic temperature control system (SART) with a heater 1, a temperature sensor 2, a sensor key 3, a control unit 5, a power switch 7, a power amplifier 8, a power supply unit 9, as well as a needle immersion device 10, an indicator 11, a remote control unit 12, a synchronizer 4, a software device 6. After the Start command, a signal corresponding to a predetermined needle temperature level is sent to the inputs of the control unit 5. After heating the needle to the temperature of destruction, it is immersed to a predetermined depth. The temperature then decreases to the level of thermocoagulation. 2 3. p., 2 ill.

Description

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The invention relates to the field of medicine, namely to ophthalmology, and can be used for thermocoagulation of biological tissues of the eye and its appendages.

The purpose of the invention is to reduce injuries by increasing the accuracy of the dosage to thermal effects on the local area of biological tissue.

FIG. 1 is a block diagram of the device; in fig. 2 - thermocoagulator design.

The device contains a needle with a heater 1 connected to the sensor .. 2 temperature, the signal from which is supplied to the key 3 of the sensor controlled by a proxy.

corresponding to a given temperature level, and to the feedback input is a signal from a temperature sensor. The error signal from the output of the control unit enters through the power switch g to the power amplifier, which is the current to the heater. As the temperature of the needle increases, the sensor signal and the temperature at the feedback input of the control unit increase, approaching a predetermined level. This reduces the error signal 0 at the output of the control unit, which limits the increase in needle temperature. When the temperature of the needle decreases or increases for any reason from a predetermined level, the control unit

i. .-- f. - ...,. v ,,,,, icjiDDu csdAdHHui and any other version of

I input synchronizer 4. The signal from the output generates a signal, respectively, imekshayu-. Key 6, proportional to the rate of tupra - ,, "", -, ", ™.", "" about, ", -," "., .."

key 3, proportional to the temperature j of the needle of the coagulator, is fed to the feedback input j of the control unit 5 of the automatic temperature control system

(CAPT). CART control unit defining

shi or increasing current heater. In this way, the temperature of the needle is stabilized.

At the beginning of the operation, the working tool

i the input of which is connected to the software; the operation tool is a tool

; with royalism 6. generates a signal OtsibkI - is poured into contact with the surface

The temperature deviation of the needle is the term of the coa biological tissue, the needle is raised upwards.

i L torus from the given. OnSn ° sig occurs

I through power key 7, given by i: destruction temperatures

; allowing the synchronizer to enter; its subsequent immersion is at: goes to the amplifier 8; the power of the GNU is from Ay-25; the depth is corresponding to the device: the energy from the power supply unit 9, the device — the temperature decreases to the level; in 10 immersion of the needle, connected to the wicked / P about the needle. In the interval of the thermoblower, controlled by a synchronizer.

: Block 1i of the indicator and exposure counter i is connected to the synchronizer and the output of the key: sensor. The synchronizer is started by the remote control node 12.

I The thermostat contains a rod 13, I made from a high-resistance heat-resistant: alloy that has a reduced cross-sectional area on one side and is reinforced; the second end on the central tokopodvod-: de 14, made of the same material. ; Outside, the rod (with the exception of the end of the working end) and part of the central current supply are covered with a layer of heat-resistant dielectric 15. A layer of electrically conductive, corrosion-resistant, heat-resistant, biologically inert material is deposited on top of the dielectric. This layer in the rod zone forms the outer sheath 16 of the needle, and in the central current lead zone the external current supply 17. The outer sheath 16 makes contact with the end of the heat-generating rod 13 and forms a thermocouple at the point of contact with the material of the rod. All materials are selected with the same thermophysical characteristics.

The device works as follows.

In the initial state, the needle is not heated. The sensor signal voltage is zero. When the command "Start from the remote control unit" is received, a signal is sent to the control unit input.

action temperature varies according to a pre-selected law. At the end of the treatment, the needle heating ceases, and it rises up.

Claims (3)

1. A device for thermocoagulation of biological tissues, containing a power supply unit, a power regulator, a remote control unit and a working tool connected to the output of the power regulator and to the first output of the remote control unit and consisting of a holder and a microcoagulator heater with a needle, installed above the holder, characterized in that, in order to reduce injuries by increasing the accuracy of dosing thermal effects on the local part of the biological tissue, an immersion drive is inserted into the device gly, automatic temperature control system (SART), software device, synchronizer and exposure indicator, and a remote control output node coupled to an input synchronizer, the first 50 whose output is connected to the input of a software device, the output of the latter is connected to the input of CAPT, the second output of the synchronizer is connected to the clock input of the CAPT, the third output of the synchronizer is connected to the first input of the exposure indicator. 55 the second input of the latter is connected to the output of the CART feedback circuit. 2. The device according to claim. 1, characterized in that. corresponding to a given temperature level, and to the feedback input is a signal from a temperature sensor. The error signal from the output of the control unit enters through the power switch g to the power amplifier, which is the current to the heater. As the temperature of the needle increases, the sensor signal and the temperature at the feedback input of the control unit increase, approaching a predetermined level. This reduces the error signal 0 at the output of the control unit, which limits the increase in needle temperature. When the temperature of the needle decreases or increases for any reason from a predetermined level, the control unit icjiDDu csdAdHHuii uiivn olok upiavleni gives a signal, respectively, izmekshayu-, "" ", -,", ™. "," "about,", -, ""., .. " gives a signal, respectively, izmekshayu-, "" ", -,", ™. "," "about,", -, ""., .. " shi or increasing current heater. In this way, the temperature of the needle is stabilized. At the beginning of the operation, the working tool   operation tools U - is brought into contact with the surface / P o o thr. In the interval of the locomotive action temperature varies according to a pre-selected law. At the end of the treatment, the needle heating ceases, and it rises up. Invention Formula 1. A device for thermocoagulation of biological tissues, containing a power supply unit, a power regulator, a remote control unit and a working tool connected to the output of the power regulator and to the first output of the remote control unit and consisting of a holder and a microcoagulator heater with a needle, installed above the holder, characterized in that, in order to reduce injuries by increasing the accuracy of dosing thermal effects on the local part of the biological tissue, the immersion drive is inserted into the device; ly, the automatic temperature control system (SART), software device, synchronizer and exposure indicator, and a remote control output node coupled to an input synchronizer, the first The output of which is connected to the input of the software device, the output of the latter is connected to the input of CAPT, the second output of the synchronizer is connected to the clock input of the CAPT, the third output of the synchronizer is connected to the first input of the exposure indicator. the second input of the latter is connected to the output of the CART feedback circuit. 2. The device according to claim. 1, characterized in that. that the thermocoagulator consists of a rod, 3. The device in PP 1 and 2 otlichaushevs the central current lead, a layer of dielectric that the CAPT includes a unit of the needle, the outer shell of the needle and an external current, a temperature sensor, a key for the supply sensor, and the rod and the central power control unit of which Gso the current lead are connected by end faces 5 in series the connection is non-junction, the lateral surface of the rod is the power and the power amplifier; covered with a dielectric layer, on top of which - HULJi, and the outer shell of the needle is applied electrically connected to the free end the rod and the transition to the external current sensor and the output of the feedback circuit supply, needle sheath, made of 1 ° CAPT, prohibiting the entrance of the sensor key of the bridge of corrosion-resistant bio-resistant biologically connected to the resolving input of the mi- erically inert electrically conductive power and the clock input of the SART signal, constituting a thermocouple into the terminal input of the power switch, is in tact with the material of the rod, and the last to the output of the control unit is a needle and made of electrically conductive thermo- 15 humor taram and connected to Dutch temperature, the output of which is connected to the input of the sensor key, the power supply unit is connected to the power amplifier. J- ... chj "JLl D CHUCH, 1" IJrt t 1V1 the control input of the control unit is connected to the CAPT input, the feedback input of the control unit is combined with the output of the sensor key and the output of the feedback circuit resistant material, and its cross-sectional area is 50–200 times smaller than the cross-sectional area of the central current lead.  in that the CAPT includes a unit for laziness, the temperature sensor the sensor key the power control unit of which GSO stands out from the series of non-switching power and the power amplifier with  - HULJ, and the sensor and the output of the CAPT feedback circuit, prohibiting the input of the sensor key is connected to the enabling input of the power much and the clock input of the CAPT signal input of the power switch is connected to the output of the control unit thermal needle J- ... chj "JLl D CHUCH, 1" IJrt t 1V1 the control input of the control unit is connected to the CAPT input, the feedback input of the control unit is combined with the output of the sensor key and the output of the feedback circuit / J