Acta chirurgica Hungarica
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Acta chirurgica Hungarica · Jan 1997
Comparative StudyComparison between continuous brain tissue measurement and cerebrovenous measurement of pO2, pCO2 and pH in a porcine intracranial pressure model.
Simultaneous oxygen measurements in brain tissue (p(ti)O2) and hemoglobin saturation measurement in cerebrovenous blood in patients after severe head injury have shown different results regarding the comparability of the findings in respect to CPP and ICP. This is contrast to theoretical expectations. The aim of this study was to compare continuous ptiO2 measurement with oxygen partial pressure measurement in sagittal sinus (pO2cv) during simultaneously performance in an animal intracranial pressure model. ⋯ In both measurement compartments pCO2 was inverse correlated to the course of CPP and seems the course of pH mainly to determine. p(ti)O2 as well as p(cv)O2 showed a close correlation to the CPP course and have proven to be qualified to indicate metabolic information about the relation of cerebral blood flow and metabolic cerebral demands. The measurement of CO2 tension in both measurement compartments shows a distinct heterogeneity of the absolute values and the results are only weak correlated to CPP. Metabolic influence on this parameter could not be revealed in the used experimental approach.
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Acta chirurgica Hungarica · Mar 1994
Serum levels of trace elements (selenium, copper, zinc) in gynaecological diseases.
The serum levels of selenium, copper and zinc were examined in benign and malignant gynaecological tumours and in metropathia haemorrhagica. According to the authors, the examination of several trace elements is necessary for the determination of the nature of the process. The levels of significance of the changes are dealt with.
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Acta chirurgica Hungarica · Jan 1994
Intestinal obstruction caused by solitary bands: aetiology, presentation, diagnosis, management, results.
Solitary band intestinal obstruction is receiving renewed interest based on the emerging possibility of laparoscopic intervention restricted to this type of small intestinal obstruction. Therefore, pertinent observations focussing on this patient population undergoing conventional "open" surgery could be of interest. ⋯ 1. History and clinical presentation of SBO can be uncharacteristic including previously nonoperated patients with vague symptoms. 2. Sonography is highly sensitive. 3. Postoperative morbidity is mainly associated with enterotomy and omitted resection. 4. The incidence of late recurrent obstruction is substantial but within the range of obstructions following enterolysis and gut repair for obstructing extensive adhesions without intestinal tube splinting.
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Acta chirurgica Hungarica · Jan 1994
The afferent circulation of the transplanted liver during the recirculatory phase in dogs.
The relationship between the changes in portal venous and hepatic arterial blood flows, e.g. the interaction of the two vascular systems in the liver always was a much disputed question, although it has tremendous significance in the practice of transplantation, and the explanation has been known since 1981, when Lautt published the so-called "adenosine washout theory" /9/. According to our earlier observations the decrease of portal pressure of flow generally and consistently led to an increase in hepatic artery flow. At the same time, changes in hepatic artery flow or pressure seemed to produce only inconsistent effects on the portal circulation. ⋯ The decrease of PVF after OLTX can be explained by a progressive fluid accumulation in the liver parenchyma and increased sinusoidal and portal inflow resistance. The prolonged and continuous increase of hepatic artery flow during recirculatory phase of OLTX may be due to the decrease of portal flow. The exact mechanism, by which a change in portal flow leads to arteriolar dilatation, can be most probably explained by "adenosine washout theory" of Lautt.
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Acta chirurgica Hungarica · Jan 1990
Indirect calorimetry methods for determination of energy expenditure.
Brief history and development of calorimetric methods for the determination of energy expenditure are discussed. The author demonstrates the measuring principles of direct and indirect calorimetry. In two clinical studies the practical use of closed and open technique of indirect calorimetric measurements are presented. ⋯ Data of modified Harris-Benedict equation adapted to clinical conditions and of continuous indirect calorimetric measurement of energy expenditure were compared in 25 septic patients. The measured and the calculated mean values showed good correlation (r = 0.82). The modified Harris-Benedict equation may be properly used in clinical practice, when indirect calorimetric measuring instrument is unavailable.