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Biomedical subjects

M P Ivanov

Publications and source records attributed to M P Ivanov.

9 recordsLinked to original sources
PubMed2004

[Intestinal gallstone obstruction].

Three cases of intestinal obstruction due to obturation with gallstones are presented. These patients made 1,3% of all patients operated for acute intestinal obstruction and 0,2% of all patients operated for cholelithiasis. This variant of intestinal obstruction is rare disease and is not characterized with a typical picture and specific symptoms. Analysis of complaints, anamnesis, additional methods of abdominal examination help to suspect biliary ileus. In emergency cases scope of surgery must be minimal and directed to adequate elimination of intestinal obstruction. Indications for simultaneous disjunction of biliodigestive fistula depend on many factors which must be regarded individually for each patient.

Aged↗
PubMed2004

[Individual dynamics of the EEG running wave under various conditions of activity].

In 25 healthy subjects at resting with their eyes closed and open, a current phase structure of the EEG was measured, i.e. a trajectory and velocity of oscillation spreading over the head surface in temporal-occipital area. Visual computer multiplication revealed stable individual specifics of the EEG "running wave" dynamics which were then confirmed independently proceeding from the statistical significance criteria. Some subjects had characteristic transversal modulations of the EEG waves (from the left fo the right and vice versa), other subjects manifested longitudinal modulations along the diagonal from the cortex left anterior areas to the right posterior those (in some of them) or along the same diagonal in the opposite direction (in others). When opening the eyes, the character of the EEG "running wave" undergoes dramatic changes. Among other parameters, a growth of the trajectory share occurs in occipital area along with acceleration of the "running wave" spreading on all other trajectories. Both effects are bound to each other and the sharper dynamics is specific for subjects characterised as sympathotonic those as compared with para-sympathotonic.

Brain↗
PubMed1991

[The effect of blood serum proteins from the seal on the analgetic action of narcotic analgesics].

The protein fraction isolated from blood of seal, Phoca groenlandica, has been found to produce hyperalgesic effect on rats exposed to thermic or electrocutaneous nociceptive stimulation, but fail to affect writhes provoked by intraperitoneal injection of acetic acid solution on mice. When combined with morphine, the fraction lowered completely its narcotic analgetic action in the above mentioned tests. On the contrary, these same proteins combined with promedol or fentanil enhanced and prolonged analgetic effect of the latter. Tested in vitro the protein showed neither opioid nor anti-opioid activity. Therefore it is reasonable to suppose that neurophysiological activity of the isolated fraction is due to the peptides formed on enzymatic hydrolysis of proteins in vivo rather than these proteins as such.

Analgesics, Opioid↗
PubMedDate not supplied

[The hyper- and hypoalgesic effects of human and animal blood serum proteins].

The protein fractions precipitated by ammonium sulfate from the bovine, human and Greenland's seal blood sera enhanced the pain sensitivity of mice, rats and rabbits. The proteins fraction of the seal blood serum was divided in six subfractions by ion-exchange chromatography. One of these subfractions clearly showed hyperalgesic properties, while the others had an opposite effect. The collagenase hydrolysate of the same protein fraction had an analgetic activity. The results of this and previous studies suggest the occurrence of one more nociception-regulating protein-peptide system in mammals.

Analgesics↗