[Stereotaxic destruction of the ventrolateral thalamic nucleus in combination with the transplantation of fetal and xenogeneic tissue in Parkinson's disease].

Four patients with Stage III-IV Parkinson's disease were operated on. Stereotactic cryodestruction of the ventrolateral nucleus was made, followed 10 minutes later by implantation of mixed fetal and xenogenic nerve tissue cells. The nerve cells-the fetal part-are obtained from human fetuses in the age range of 14-18 weeks of development.

[Cryocatheter-tourniquet].

To simplify the design of the cryo-instrument and to adapt it to the forms and dimensions of the organ undergoing surgery or of any other object a cryocatheter-tourniquet is proposed, where a thin-walled, flexible tube passed in a loop like-manner through the opening of another tube (after the type of a tourniquet), is used as a conduit of the cooling agent. The loop out on the object to be operated upon forms the working part of the cryosurgical appliance.

[Surgical cryo-ultrasonic instrument].

With the YPCK-7H unit, serving as a base, a cryo-ultrasonic instrument for a combined use of cryogenic and ultrasonic methods has been constructed. A pipe for the passage of liquid nitrogen is mounted on an ultrasonic waveguide, this securing the cooling of the soft tissue subjected to the operation down to--135--80degreesC and separation of the tissues with the frequency of ultrasonic oscillations within a range of 20 to 45 kHz. The surgical cryoultrasonic instrument is apt to significantly increase the efficacy of hemostasis and helps achieve a still better neatness of the cut, this obviously being due to the cryogenic factor which adds advantage to the ultrasonic operative intervention.

[Device for the experimental local application of cold to organs and vessels of the abdominal cavity].

A study of the action produced by local freezing on the esophageal and gastric mucosa under conditions of acute hyperemia, on the veins and arteries of various diameter - for preventive stasis of the blood flow along them and on the nerve: carrying sheaths of major arteries made it possible to construct a cryosurgical instrument of a simple design and easy to handle. The working end of this instrument that acts on the organ undergoing operation is cooled down to -185 degrees. The instrument ensures a sufficiently effective utilization of the coolant and its low consumption during surgery.