US 5,667,505 A · Method of carrying out cryosurgical interventions and device for this method

Abstract

A method of carrying out cryosurgical interventions includes cooling biological tissue at a rate of at least 180 K/min to a temperature of -190.degree. C. to -160.degree. C., subsequently rewarming the biological tissue at a rate of 100 to 240 K/min to a temperature of -70.degree. C. to -20.degree. C. with a subsequent rewarming at a rate of 10 to 25 K/min to a temperature of -5.degree. C. to +5.degree. C., and further rewarming the biological tissue up to body temperature. The total time of the controlled rewarming of the biological tissue is shorter than 5 minutes. An apparatus for carrying out the method of cryosurgical interventions includes a container of cooled medium an operating instrument, and a control unit for controlling the cooling and subsequent rewarming of biological tissue. The control unit includes a microprocessor coupled to electronic switches and a measuring unit.

Claims17

Dependent claims

A device for performing cryodestruction of tissue comprising:

an operating instrument including a heat exchanger having a first heater, a valve, and a first temperature sensor;
a pressurized container of cooling medium for delivering cooling medium to the operating instrument, the pressurized container including a second heater, a second temperature sensor, and a pressure sensor;
an outlet gas heating means including a third heater, and a third temperature sensor;
and
a controlling microprocessor coupled to electronic switches of the valve, and the first, second, and third heaters, said controlling microprocessor being further connected to a measuring unit coupled to the first, second, and third temperature sensors, and the pressure sensor, the controlling microprocessor providing means for varying a rewarming rate during rewarming of the tissue.

2 more elements

A hand held device for carrying out cryosurgical interventions, comprising:

an operating instrument having an operating tip for applying cryogenic energy to tissue;
a heat exchanger and a heater of the heat exchanger, the heater and heat exchanger being located at the operating tip;
a container of cooling medium mounted on the operating instrument for supplying the cooling medium to the operating tip, the container including an container heater;
a heater of outlet gasses;
a control unit, said control unit comprising a controlling microprocessor coupled to electronic switches of the heat exchanger, of the heater of the heat exchanger, of the heater of outlet gases and of the container heater, said controlling microprocessor being further connected to a measuring unit coupled to a thermometer of the heat exchanger, to a further thermometer of the heater of outlet gases, to a manometer of the container, to level indicators of the container and to a further thermometer of the container, the controlling unit providing means for varying a rewarming rate during rewarming of the tissue.

2 more elements

Dependencies are inferred from the claim text.

Method of carrying out cryosurgical interventions and device for this method

Life of this patent

Method of carrying out cryosurgical interventions and device for this method

Life of this patent

Abstract

Claims17