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The purpose of this study--a comparative evaluation of the treatment of postoperative acute respiratory insufficiency in cardio surgical patients with lung opening maneuver and conventional mechanical ventilation. The study included 81 patients operated on the heart and magistral vessels in which the immediate postoperative period was complicated by the development of acute lung injury. Patients were divided into 2 groups: 1 (main) group (48 patients), on which the open lung technique was used, 2 (control) group (33 patients) who underwent a standard respiratory support. The initial values of the partial oxygen pressure in arterial blood and the oxygenation index in patients of both groups were significantly reduced, and the fraction of intrapulmonary shunting - significantly increased. Starting with 1 day sharp increase in PaO2 and IE in patients with the first group was noticed, which coincides with the beginning of the opening of the alveoli. At the same time, the dynamics of these indicators in the second group had the reverse tendency. After the recruiting maneuver in all patients significant improvements in the mechanics of breathing were noticed. As a result of the recruiting maneuver in the first group sustained improvement of arterial oxygenation was achieved in 35 patients. In patients with acute postoperative respiratory failure recruiting maneuver led to a significant increase in arterial oxygenation and reduce the fraction of intrapulmonary shunt. Application of "open lung" maneuver leads to the resolution of respiratory failure, which greatly reduces the timing of mechanical ventilation and length of stay of patients in intensive care units in comparison with traditional methods of respiratory therapy.

A prospective randomized study was conducted to compare the antiarrhythmic activity of amiodarone and propafenone used to prevent atrial fibrillation (AF) after aortocoronary bypass surgery (ACBS). The study included 100 patients who had undergone myocardial revascularization. The patients were divided into 2 groups that did not significantly differ in their baseline condition, history data, the type of a surgical intervention, and the incidence of postoperative complications. Antiarrhythmic therapy was initiated within the first 24 hours after surgery. Group 1 (n=50) was given intravenous amiodarone in a dose of 6 mg/kg/day. Rhythm disturbances occurred in 13 (26%) patients. Group 2 (n=50) received oral propaferone in a dose of 6.6 mg/kg/day. AF occurred in 5 (10%) patients. The difference between Groups 1 and 2 was statistically significant (p = 0.047). The preventive use of propafenone recovered sinus rhythm in earlier periods (4602 +/- 71 min) than that of amiodarone (760 +/- 82 min); p = 0.049. Thus, propafenone was found to be a more effective drug used to prevent AF after ACBS, which is attributable to different pharmacodynamic behavior of the agents.

A quaternary ammonium-based room temperature ionic liquid trioctylmethylammonium salicylate (TOMAS) has been studied as an extractant of transition metal ions (Fe(3+), Cu(2+), Ni(2+), Mn(2+)) in aqueous solutions. The effect of pH value on the recovery of metal ions has been investigated. The mechanism of extraction into the ionic liquid has been proposed. The possibility of stripping voltammetric determination of transition metals in aqueous solutions using TOMAS-modified electrodes has been demonstrated.

Ionic liquids that melt slightly above room temperature (and may be called low-melting ionic solids, LMISs) were used as sensing materials for the detection of ions in aqueous solutions. A simple procedure based on the consecutive melting and further solidification of the LMISs was applied to prepare solid-contact ion-sensitive electrodes. A potentiometric response toward a number of anions was observed, and the possibility of altering the selectivity by incorporating additional ionophores into the LMIS matrix was demonstrated.

Objective: to evaluate the efficiency of pharmacological correction of a systemic inflammatory response in patients after coronary bypass surgery, by using mexidol., Subjects and Methods: 40 patients with coronary heart disease, who had undergone myocardial revascularization were examined. A study group (n = 20) received mexidol within 5 days before, during, and 5 days after surgery. A control group (n = 20) were given 0.9% NaCl solution. The degree of a systemic inflammatory response was estimated from the levels of C-reactive protein (CRP), the cytokines IL-6, IL-8, and TNF-alpha. The activities of serum enzymes and myoglobin were determined., Results: after surgery, both groups showed the elevated concentrations of IL-6, IL-8, TNF-alpha, and CRP, but their elevation was statistically significant less in the study group than in the control one (p < 0.05). In both groups, there were increases in the levels of alanine aminotransferase, aspartate aminotransferase, gamma-glutamyl transpeptidase, lactate dehydrogenase, creatinine phosphokinase, and myoglobin, which was statistically significant more apparent in the control group (p < 0.05)., Conclusions: mexidol diminishes the magnitude of a systemic response after aortocoronary bypass surgery under extracorporeal circulation and has an organ-protective effect.

Cellulose films containing entrapped analytical reagents suitable for metal-ion detection are produced by joint dissolution of cellulose and the reagents in ionic liquids then precipitation with water. The conditions of preparation of these test materials have been optimized and their properties have been studied. The film obtained by use of the ionic liquid 1-butyl-3-methylimidazolium chloride and 1-(2-pyridylazo)-2-naphthol has been used for colorimetric determination of divalent zinc, manganese, and nickel with detection limits at the 10(-6) mol L-1 level.

The possibility of performing the recruiting artificial ventilation technique with a high plateau and positive end-expiratory pressure was studied in 32 cardiosurgical patients, including those with cardiovascular insufficiency. The lung opening maneuver, by using the artificial ventilation adjustable by pressure and the monitoring peak pressure, PDKV, tidal volume, and dynamic compliance, by accurately determining the points of opening and closure is the method of choice in alveolar recruitment. This method permits a significant improvement of arterial oxygenation and dynamic compliance of the lung in patients with acute respiratory failure. This maneuver using the high airway pressures adversely affects hemodynamics particularly in patients with lowered reserves of the cardiovascular system. In this connection, a careful monitoring of hemodynamic parameters is required for the timely provision of cardiotonic and vasopressor support.

The study deals with infusion therapies in children with thermal injury and with its impact of its qualitative composition at the local (tissue) and systemic levels. The investigations have indicated that the best qualities' in replenishing the volume of circulating blood and in eliminating hypovolemia are shown by hydroxyethylated starch (the study used voluvene) that offers advantages in the rate of correction of blood concentrations and in the maintenance of a volumic effects and that increases oxygen delivery, resulting in a rapider emergency from shock and improving the trophism of a burn wound.

Twenty patients aged 33 to 71 (54 +/- 6) years (male - 13, female - 7) operated on the heart and main vessels were included in the case study. I.e. those patient were investigated, whose immediate postoperative results were complicated by the syndrome of multiple organ failure (SMOF) that developed due to different-etiology shock, huge blood loss and hemotransfusion or to the syndrome of acute postperfusion lung damage. NIMLV was made at the resolution stage of SMOF and ARDS after artificial pulmonary ventilation (APL) for as long as 5-7 days. The indications for extubation of patients were as follows: PaO2/FiO2 of 200 and more mm Hg, respiratory rate (RR) of less than 30 per min, respiratory volume of more than 6 ml/kg with pressure support at inspiration of less than 5 cm H2O and with the total pressure at the exhalation end of no more than 3 cm H2O. Mask ventilation sessions were started in a growing dyspnea of more than 26 per min, a decreased content of oxyhemoglobin in arterial blood (below 95% at oxygen inhalation of 10-15 l/min), involvement of auxiliary muscles in breathing and at subjective complaints of patients related with complicated breathing and with being short of air. The mask SIMV ventilation with a preset apparatus-aided rate of inhales of 2-6/min, with Bi-PAP and PSV inhale pressure of 15 cm/ H2O and with PEEP of 3-5 cm/ H2O was made by 40-120 min sessions; the number of IFMLV sessions ranged from 6 to 22/patient, mean - 11 +/- 1.1 h. The total IFMLV duration was 10.7 +/- 1.1 h. The need for respiratory support persisted for 4-6 days after extubation. In 18 (90%) of 20 patients, the mask pulmonary ventilation resolved the respiratory insufficiency. Two (10%) patients were reintubated because of progressing multiorgan failure and because of obturation of the left main bronchus. A questioning of patients on the comfort degree of mask ventilation denoted the Flow-by triggering to be by far better tolerated by patients versus the pressure triggering.

An efficiency and safety of continuous infusion of naropin in the epidural analgesia of 38 patients after coronary artery bypass grafting were demonstrated. A variation of combined anesthesia, which was elaborated at the Russian Research Center of Surgery of the Russian Academy of Medical Sciences and which comprises (as a basic component of anesthetic management) a high thoracal epidural block (T2-T4) by continuous infusion of a 2% solution of naropin at a velocity of 5 +/- 2 ml/h. Anesthesia was supported by isoflurane (0.5 +/- 0.9%). The patients were extubated in the operated theater and taken to the resuscitation unit with continuous infusion of 0.2% naropin solution. All studied parameters were registered after discharge from the operating theater and 1, 3, 6, and 16-18 hours after surgery. The pain-syndrome intensity was measured at the verbal scale with 0 to 3 points. The mean duration of continuous naropin infusion was 16.7 +/- 0.5 h, mean dose--2.2 +/- 0.2 ml/h. Naropin was administered at a dose of 1-3 ml/h in 89.7% of cases and at a dose of 6 ml/h only in 2.9% of cases. The drug, when used in small doses, ensured a high anesthetic efficiency. A total lack of pain or a mild pain of 0.1 points was observed in 86.5% of patients at stage 5 of examinations and in 100% of patients at stage 3. Naropin infusion did not entail any impairment in ventilation or gaseous metabolism. A reliable decrease of arterial pressure (AP) and of central venous pressure (CVP), (p < 0.05) were registered beginning from stage 2. CVP decrease versus stage 1 was ensured in 38.% of patients by stage 4 and the number of patients with a decreased CVP (less than 60 mm H) went up, versus stage 1, by 3 times. APsyst of less than 90-80 mm Hg was registered in 15 (39.8%) of patients at different examination stages, which necessitated the use of noradrenalin at mean dose of 174 +/- 21 ng/kg.min. The infusion of naropin at dose of 1-6 ml/h did not entail any impairment in the central nervous system (hallucinations, convulsions, and headache).

The activity of a regional reanimation-and-consultation center (RCC) related with transportation of 3219 children (79.5% of them were newborns) is summarized in the paper. The share of children assigned for artificial lung ventilation (ALV) increased from 50.8% to 82.6%, while the lethality rate dropped from 12.8% to 6.9%. The above results were enabled by a maximally early re-hospitalization of patients from therapeutic-and-prevention facilities (TPF) with limited medical care abilities and by early preparations (for transportation) by using the DINAR-2 expert system. The children were transported only after the main vitally important systems had been compensated for and with support of an adequate intensive care therapy. Should the above principles be met, the specialized therapy could be started at he earliest possible time; it promoted the therapy quality and cut the patients' stay in intensive care units.

An assessment of the key pathogenesis chains involved in triggering the vital complications was based on a prospective randomized controllable retrospective study of a burn-disease clinical course in 473 children. As a result of it, a standardized system was worked out, within a large industrial region, designed to render the medical care to children with severe thermal lesion; such system cut the therapy time by 12 days in the intensive care unit and by 2.6 time--in hospital; it also contributed to reducing the purulent-and-septic complications from 73.9% to 21% and the lethality rate--from 3% to 0.8%.

Infectious complications after combustion represent the leading cause of lethal outcomes and attract an increasing attention of specialized services (anesthesiologists-resuscitators, combustiologists, infectionists, immunologists, clinical pharmacologists etc.). The increased incidence of the pyo-septic pathology in the whole world resulted first of all in the growing number of complications of burn disease in children. At the same time there appeared new pathological states which are thought to be outside the frame of traditional notions (e.g. the development of toxic shock syndrome). Many causes depending on the functional peculiarities of the children organism are responsible for the specific course of burn disease in children, the process itself having a number of peculiar features.

Clinical observations show that intubation continuing as long as 7 days are followed by complications in 37% of cases at an average. A longer intubation results in complications twice more often. Placing tracheostoma is an alternative of prolonged intubation of the trachea. In spite of the wide introduction of this method into practice, it has both the supporters and active opponents. The indications, specific features and consequences of placing tracheostoma were studied in 69 children. The assessment of the efficiency of treatment of children in critical states with the method of placing tracheostoma is given.

Prone position ventilation (PPV) became an effective method of management of ARDS since 1974. Its positive effects on arterial oxygenation have been amply described, but its impact on the results of treatment and hospital mortality remains a disputable point. We observed 2 groups of patients, 36 pts. each, with ARDS after cardiovascular surgery. The main causes of ARDS were shock syndrome, massive blood loss and transfusion, previous COPD, and postcardiopulmonary bypass ALI. Because of impaired lung function (PaO2/FiO2 < 200), all patients were supported by special methods of ventilation including PEEP, high FiO2, and PCV with inverse I:E ratio. In the main group, PPV was started on days 3.6 +/- 1.2 postoperation. Daily duration of PPV was 4-12 h, after which the patients were turned into a supine position. Controls were treated in a supine position. The groups were identical by age, sex, types of surgery, severity of ARF, and manifestations of MOSF. PPV improved lung function and arterial oxygenation. Clinical outcomes were better in the PPV group than in the controls: a lower frequency of threatening arrhythmia, better results of MOSF treatment, and lower mortality (69 and 33.4%, respectively). Prone position is an effective measure improving arterial oxygenation in patients with ARDS after cardiovascular surgery. The main results of PPV are decrease in complications induced by hypoxia and higher survival rate.

Visual perception is disordered in children aged 10-15 years subjected to surgery under ketamine and brietal anesthesia in an outpatient setting. Psychological testing was carried out during 24 h after intervention. Results of the Rorschach's test indicate that ketamine impairs the quality of visual perception (inadequate evaluation of the size, shape, velocity, etc.). Brietal disorders mainly the integrity of visual image. Visual perception did not normalize 24 h after both anesthesias. Disorders typical of each drug persisted.

Search for effective method for decreasing the mortality of children with severe thermal injuries and approaches to preventing and treating multiorgan dysfunction in severe thermal injury is a pressing problem of reanimatology. The majority of scientists consider disorders in the ventilation-perfusion function of the lungs the main factor in the pathogenesis of burn shock. Lung injury is most often the first manifestation of multiple organ dysfunction. The depth of disorders in the gas exchange function of the lungs clearly correlates with the severity of burn injury and the terms of the beginning of respiratory support. The severity of burn shock, preclinical diagnosis of acute respiratory distress syndrome and disseminated intravascular blood coagulation, depth of hemodynamic disorders and disorders in the oxygen transporting system can serve as a criterion of the compensatory stress and be an indication for active respiratory therapy. Comparison of the main and control groups demonstrated the efficiency of early respiratory therapy in children with severe burns, because such therapy normalizes the blood oxygen transporting function and hemodynamic parameters sooner and with less strain for the compensatory potential of the organism.

A model of regional network of pediatric resuscitation has been created in the Sverdlovsk region. The model is based on evaluation of hazards, is staged, standard, and makes use of a universal information space. The unifying structure is a pediatric resuscitation consultation center. Its main tasks are therapy and counseling in the region and introduction of overall training in reanimation and intensive care of children, with improvement of the level of urgent care at therapeutic institutions of the region. The activities of the resuscitation care network promoted a significant decrease in neonatal mortality by 29.5% and of infant mortality by 28.7%.

Effect of ventilation in the face-down position (VFDP) on the oxygenation function of the lungs and hemodynamics is studied in 32 patients (aged 22-64 years) subjected to open-heart surgery complicated by development of acute respiratory failure (RF). In 23 patients with grave respiratory distress syndrome, VFDP was performed with forced ventilation of the lungs (FVL) and in 9 with less grave RF, with noninvasive mask ventilation of the lung (NIMVL). Body position of patients on FVL was changed every 4-12 h, of nonintubated patients, 45-60 min. The oxygenation function of the lungs improved in the intubated patients as early as during the first hour of FVL in the face-down position: PaO2/FiO2 notably increased and a tendency to decrease of A-aDO2 and Qs/Qt was observed. The positive effect was maximal after at least 4-hour FVP in the face-down position: PaO2/FiO2 increased by 76.6%, intrapulmonary shunting fraction decreased by 43%, and the O2 alveolar-arterial difference decreased by 27% in comparison with the initial values. After body position of patients was changed, the above improvements did not disappear, despite a slight decrease of the effect attained. VFDP with NIMVL led to similar results: O2 alveolar-arterial gradient decreased, PaO2/FiO2 decreased by 24.2%, the mean values of this ratio approaching the norm. Positive effect somewhat decreased after catecholamines were discontinued, but the oxygenation function of the lungs remained better than initially.

The authors analyze the respiratory complications in patients with acute respiratory failure (ARF) developing as a result of poisoning with organophosphorous (OPC). Twenty-two percent of 470 patients had to be maintained on forced ventilation because of ARF. The indications for forced ventilation of the lungs are as follows: paralysis of respiratory muscles, 90% drop of vital capacity of the lungs, and disorders of the gaseous composition of the blood (PaCO2 over 56 +/- 3 mm Hg and PaO2 below 67 +/- 5 mm Hg). The incidence of respiratory complications among patients on forced ventilation was as high as 92%, which is due to the pathogenesis of the chemical disease developing after OPC poisoning. The complications are the most incident among men aged 30 to 60. The respiratory distress syndrome of adults ranks first among the respiratory complications. It was diagnosed in 70.6% of dead subjects in 34.4% of convalescents. This syndrome is one main cause of high mortality, particularly so in subjects dying in three or more days of intensive care. The duration of forced ventilation of the lungs does not depend on the time when the patient was transferred on ventilation or on the poison. Analysis of mortality indicates that it is lower among patients administered forced ventilation at the prehospital stage.

The severity of acute respiratory failure (ARF) in patients with purulent meningitis (PM) depends on the severity of consciousness disorders. ARF is most expressed in comatose patients, whereas in PM involving no consciousness disorders there were no changes of the gaseous composition of the blood or acid-base status. After forced ventilation of the lungs is started, gaseous composition of the blood normalizes. Timely active respiratory care decreased by half the mortality in this patient population, this indicating that such patients are to be treated in intensive care wards for timely correction of disordered vital functions.

The status of the higher nervous activity after two most common variants of total anesthesia (with ketamine and fluothane) was assessed in 33 children with cleft lip and palate aged 7 to 15 subjected to rhinocheiloplasty. Memory, attention, emotional and motor spheres were examined for 3 months after surgery. The effect of total anesthesia with ketamine on the mental status was found more detrimental. Long-term mechanical memory proved to be the most informative parameter. Its impairment presented as reversible functional injuries. Teaching of children subjected to such interventions should be carried out with due consideration for the predominant impairment of long-term memory, persisting for 2 weeks after fluothane anesthesia and for 1-2 months after ketamine anesthesia.

The authors present the structure of resuscitation care of children in a large region (Sverdlovsk district) and analyze its efficacy in recent 5 years. A specific feature is the creation of a novel institution: resuscitation consulting center, carrying out therapy and consultations on a wide scale and regular organizational and methodological activity, consisting in improving specialized care both in the center and in other clinics, in upgrading specialists, and improving the equipment of resuscitation departments. An important element of the system is a universal information base for improving the diagnosis of threatened states and making strategic decisions. Proper functioning of all elements of the system will help not only decrease the level of hospital mortality, but the childhood mortality in general as well.

New methods for the diagnosis of the endogenous intoxication syndrome (EIS) in critical states have been developed and tried in 585 infants. A complex of biochemical, hemorheological, biophysical, and optic polarization parameters characterizing the intensity of catabolic reactions and united under the term "endotoxicogram" is offered. Objective assessment of EIS is expressed by an integral index of intoxication which permits a universal assessment of the severity of patient's status, disease course, and efficacy of therapy and helps predict the disease outcome.

Central hemodynamics, phase structure of left-ventricular systole, and paO2 were studied in 104 patients with organophosphorus poisoning complicated by exotoxic shock during forced ventilation of the lungs (FVL) with positive zero expiration pressure, positive end expiration pressure +5, +7, +10 cm H2O, and high-frequency FVL. FVL with positive end expiration pressure +5 or +10 cm H2O was found to be the optimal for patients with compensated shock. In patients with decompensated phase of exotoxic shock FVL with positive zero expiration pressure and FVL with positive end expiration pressure +5 cm H2O, although having no negative impact on the hemo- and cardiodynamics, did not provide sufficient oxygenation of the blood. Higher values of positive end expiration pressure (+7, +10 cm H2O) brought about disorders of heart work. High-frequency FVL appears to be the most rational in patients with decompensated phase of shock.

Two thousand cases of anesthesiological support during reconstructive facial surgery in children aged from 1 to 15 have been reviewed. Gas exchange, heart rate, hemodynamics and neurological status have been assessed. The most frequent and severe complications have been outlined. A most safe variant of balanced anesthesia using ketamine combined with controlled lung ventilation with positive end expiratory pressure has been suggested for intraoperative and postoperative periods.

Basing on clinical studies of anesthesia in 568 children, central hemodynamic studies, analysis of the blood acid-base balance and gases, glycemia level, and assessment of the psychoneurologic status, the authors validate the usefulness of calypsol-based anesthesia in practical outpatient pedodontics. Such anesthesia did not influence the stability of central hemodynamics parameters, nor did it change the acid-base balance and blood sugar level; it provided an adequate protection of the patient from surgical stress with the adaptation mechanisms remaining intact. The child may leave the clinic 2.5-3 h after the intervention and a test for adequate adaptation to the environment. Calypsol-based balanced anesthesia improves outpatient care of the children, introduction of this method into practice will bring about a good economic effect.

A study was made of platelet alpha 2- and beta 2-adrenoreceptors stimulated by adrenaline and alupent as well as of hemostatic system parameters the levels of ACTH, cortisol, glucagon and C-peptide in the blood of women with type I diabetes mellitus during pregnancy, surgical delivery, and the postoperative period. It is shown that the changes in the sensitivity of both subtypes of platelet adrenoreceptors are closely related to the activation of the stress-realizing systems and may serve as a test for estimating the intensity of neurohumoral imbalance both during pregnancy and surgical intervention. The sensitivity of platelet adrenoreceptors to agonists may be examined by a simple retention test allowing rapid information to be derived, which is of paramount importance under clinical conditions.

The method of blood stabilization using sodium citrate ("Glugicir") has been elaborated. The experimental hemosorptions (HS) have shown that reliable blood stabilization in extracorporeal sorption contour was achieved with Glugicir/blood ratio 1 to 10, no considerable changes in the basic clearance characteristics of the sorbents have been observed. The method elaborated was used in 135 HS sessions performed in 100 patients. It has been shown that sodium citrate causes no changes in the patients' hemostasis. The method of regional blood stabilization with sodium citrate may be recommended for HS in patients with bleeding or high risk of its development. Mild symptoms of citrate intoxication (3.7%) were associated with technical inaccuracy and were easily eliminated either by discontinuation of excessive Glugicir introduction into the contour or by intravenous injection of calcium salts.

Eighty nine children with the cleft lip and cleft palate underwent 95 surgical interventions under ketamine anesthesia. During 51.6% of interventions traditional AVL and during 48.4% of interventions high frequency AVL were used. It was demonstrated that central hemodynamics, systolic time intervals and metabolic parameters were similar in the case of traditional and high frequency AVL; however high frequency AVL proved more efficient in preventing complications during cleft lip and cleft palate surgery.

A case of a successful treatment of a patient with an extremely severe tetanus form is described. The management of the patient included massive specific antibacterial and infusion therapy, hemoperfusion, standard and high frequency controlled lung ventilation. The problems of patient activation and respiration recovery have arisen in the course of treatment. They were dealt with, using hemoperfusion that reduced the residual effect of sedative agents and myorelaxants, as well as high frequency jet ventilation, which accelerated respiration recovery.

The specific features of optical digital computers in integrated circuit form, whose principle of operation is based on electrooptic light modulation, are considered. The design of an array processor unit is described. It is shown that the optical communication channels introduced into integrated circuit structures with the help of thin film light modulators enable one to reduce, compared to electronics with equivalent functional capability, the total number of device components by 2 orders of magnitude, the interconnections area by an order of magnitude, and to increase performance by a factor of m (m is the image dimension). The experimental results of studying a cell of dynamic memory constructed with the above components are presented.

The results of testing the blood sera obtained from donors at a blood transfusion center in Moscow for the presence of antibodies to rubella, measles and herpes simplex viruses, carried out by means of the enzyme immunoassay with the use of the corresponding test systems, are presented. Antibodies to rubella, measles and herpes simplex viruses have been detected, respectively, in 81.5, 96.7 and 100% of blood sera. The proportion of sera with low, medium and high antibody titers has proved to be virtually the same with respect to antibodies to rubella and herpes simplex viruses, the sera with medium antibody titers constituting 59%. At the same time tests for measles antibodies have shown the prevalence of sera with low titers (49.2%) with the highest percentage of seronegative donors (18.5%, as compared with 3.3% in rubella and the absence of negative sera in herpes simplex).

The carried out study proved great possibilities and prospects of sensography for an objective estimation of the pain sensation alteration in the postoperative period. In children, operated upon under the conditions of neuroleptic analgesia (NLA), a prolonged and effective postoperative analgesia was noted. Its duration depends on the localisation and character of the operation and on the combination of NLA preparations with narcotics as well. The combination of NLA with sodium hydroxybutyrate provides the deepest and longest postoperative analgesia and increases its incidence, which is no less important.