[Intraoperative correction of temperature homeostasis disturbances in children].

Some features of temperature homeostasis regulation during the intraoperative period and methods of its correction with a balanced fluid therapy are described. The possibility of using infusion of antihypoxants and amino acid solutions to maintain optimum body temperature during the perioperative period is considered. The study was performed on a group of 107 children of various age, which underwent a surgery of thoracic or abdominal cavity. All operations were performed with total intravenous anesthesia and artificial pulmonary ventilation. In order to correct intraoperative hypothermia, sodium chloride 0.9% solution, mafusol, infezol-40, and reamberin were used. Results showed that reamberin produced a significant positive effect on the indices of peripheral body temperature. This allows reamberin to be recommended for widespread use in clinical practice in order to prevent and eliminate intraoperative hypothermia.

[Comparative assessment of electroencephalographic readings and perfusion index in patients in the perioperative period and coma].

Different monitoring modes are used to estimate the depth of anesthesia. Electroencephalography (EEG) is employed as a method of an electrophysiological study of brain function both during anesthesia and at the neuroresuscitative stage and changes in the peripheral vascular bed are evaluated by means of the perfusion index (PI). The purpose of the study was to comparatively analyze the use of EEG readings and PI at different stages of surgery and in coma of various etiologies. Thirty female patients aged 30-70 years (Group 1) operated on under general anesthesia were examined. Group 2 consisted of 14 intensive care unit patients of both sexes and different ages (range, 3 to 60 years) who had depressed consciousness to the comatose level. The association established between the changes in EEG reading and PI in the perioperative period allows estimation of the depth and adequacy of anesthesia, by analyzing the changes in both EEG and PI. Unlike central hemodynamic parameters, PI shows an earlier response to nociception. Group 2 patients had also synchronous changes in EEG and PI characteristics in various clinical conditions.

[Possibilities of controlling intraoperative thermoregulation].

The agents containing succinic and fumaric acids were used to control body temperature during an operation. Elective surgical interventions into small pelvic organs were made in 22 females aged 28-55 years, who were divided into 2 groups. In group 1 (n = 11), the agents containing succinic and fumaric acids were used and infusion therapy that did not differ from Group 2 (n = 11) in all other respects. The level of metabolism, temperature in the rectum and big toe, and other parameters were estimated. Administration of the drugs containing carboxylic acids of the Krebs cycle was shown to lead to the activatization of metabolism, the maintenance of core temperature, by increasing peripheral body temperature at surgery.

[Rheography of extracorporeal circulation: verification of method and calibration of the monitor]. / Reografiia iskusstvennogo krovoobrashcheniia: proverka metoda i kalibrovka monitora.

Cardiopulmonary bypass as a reference flow model for impedance cardiography monitoring is described in 34 children during open-heart surgery. Such an approach not only proved the accuracy and precision of impedance cardiac output measurement, but also gave a possibility to make intra-operative calibration of any cardiac output monitor which maintains its accuracy during the post-bypass period.

[Thermodilution and rheography: the coincidence and reproducibility of results]. / Termodiliutsiia i reografiia: sovpadenie i vosproizvodimost' rezul'tatov.

A comparison of the pulmonary artery thermodilution and tetrapolar impedance cardiography of cardiac output measurements based on 312 dual determinations has shown a good general coincidence, but better reproducibility of the impedance cardiography data and more evident character of the errors and artifacts. The authors' analysis of the mechanisms and causes of such phenomena is based both on their own conclusions and on a wide spectrum of the data of previous investigations.

[Rheographic monitoring of intraoperative hemodynamics]. / Reograficheskii monitoring intraoperatsionnoi gemodinamiki.

The authors summed up the experiences with using noninvasive monitoring of hemodynamics during 420 operations. The method was based on computed procession in the real time of the integral rheogram of the body. The advantages, shortcomings and technological details of the method were analyzed.