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R Nesbakken

Publications and source records attributed to R Nesbakken.

At least 37 records · Page 2Linked to original sources
PubMed1979

Plasma acetate concentrations during canine haemorrhagic shock.

Acetate, pyruvate, lactate and NEFA concentrations, as well as acid-base-parameters were followed during bleeding, stable hypotension and re-infusion in five dogs. Mean arterial blood pressures were kept at 30 mmHg during the shock phase. An increase in acetate concentrations (P less than 0.01) was found in arterial as well as in venous plasma samples. The maximal mean acetate concentration was 0.19 mmol/l (during reinfusion) as compared to 0.06 mmol/l prior to bleeding. There was no difference between arterial and inferior caval venous concentrations. A definite correlation (r = 0.81, P less than 0.02) was found between blood pyruvate and plasma acetate concentrations. There was no correlation between plasma glucose or NEFA and acetate concentrations or between blood excess lactate and plasma acetate. The plasma acetate accumulation was negligible compared to the concomitant lactate accumulation (1:60), and did not contribute to the metabolic acidosis of shock. The correlation between acetate and pyruvate concentrations may indicate that pyruvate is the main substrate of acetate production in hypovolemic shock.

Acetates↗
PubMed1979

Utilization of exogenous acetate during canine haemorrhagic shock.

Plasma acetate and lactate, as well as acid-base-parameters were followed during acetate (dogs I-V) or lactate (dogs VI-X) loading during stable hypotension (mean arterial blood pressure 30 mmHg). Acetate or lactate were infused at a constant rate of 4 mmol/kg/h as 0.5 mol/l solutions (50% as the sodium salt, 50% as the free acid) without simultaneous treatment of the volume deficit. The acetate metabolizing capacity was well preserved even in profound haemorrhagic shock. The actual loads were rapidly removed, while the equivalent lactate loads caused progressive accumulation of the lactate ion. Acetate loading did not aggravate the lactic acidosis, and the acid-base-parameters showed a more favourable development during acetate loading than during lactate loading. Acetate may thus be given during haemorrhagic shock without the same risk of accumulation that is carried by the equivalent amounts of lactate.

Acetates↗
PubMed1979

Acetate production and substrate availability in the dog.

Arterial plasma acetate, glucose and NEFA concentrations were measured during loading with glucose/insulin and fat emulsion/heparin, and during epinephrine and norepinephrine stimulation in dogs. The expected alterations in glucose and NEFA concentrations were found. Acetate concentrations were not influenced, and remained constant in all experiments. Since acetate removal from the body pool is mainly concentration dependent, it may be concluded that acetate production was constant under the conditions described. "Overflow disposal" of AcSCoA to yield free acetate in cases of high rates of AcSoA-production does not occur as long as the Krebs cycle is intact.

Acetates↗