Trimethaphan - CAS 7187-66-8
Catalog number: 7187-66-8
Category: Inhibitor
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Molecular Formula:
Molecular Weight:
Trimetaphan camsilate can counteract cholinergic transmission at the ganglion type of nicotinic receptors of the autonomic ganglia and this lead to block both the sympathetic nervous system and the parasympathetic nervous system. Trimetaphan camsilate is a non-depolarizing competitive antagonist at the nicotinic acetylcholine receptor.
Thieno(1',2':1,2)thieno(3,4-d)imidazol-5-ium, decahydro-2-oxo-1,3-bis(phenylmethyl)- (VAN)
Soluble in DMSO
-20℃ Freezer
Quality Standard:
In-house standard
Shelf Life:
2 month in rt, long time
Canonical SMILES:
1.The hemodynamic and metabolic changes in prostaglandin E1-induced hypotension in dogs--a comparative study with trimetaphan-induced hypotension.
Nam YT;Takahashi S;Tominaga M;Yoshitake J J Anesth. 1989 Sep 1;3(2):210-7.
The hemodynamic and metabolic changes in hypotensive state induced with prostaglandin E1 (PGE1) or trimetaphan (TMT) infusion were investigated in dogs. Mean arterial pressure was decreased by about 50% with 1.58 microg/kg/min of PGE1 or 45 microg/kg/min of TMT. Heart rate, pulmonary capillary wedge pressure and central venous pressure remained virtually unchanged in the two groups. Cardiac output was well maintained in PGE1 group, whereas cardiac output showed the tendency to decline in TMT group. Greater reduction in systemic vascular resistance was seen in PGE1 group than in TMT group. Pulmonary vascular resistance showed no significant change in PGE1 group, whereas it increased significantly in TMT group. Gradual decreases in arterial pH, PaO2 and base excess and slight but significant increase in PaCO2 was observed in PGE1 group, and these abnormalities recovered 30 min after hypotension. Abnormalities in blood gases and acid-base balance were considerably more severe and prolonged in TMT group compared with those in PGE1 group. Blood lactate and pyruvate concentrations showed no significant changes in PGE1 group, whereas substantial elevation was seen in L/P ratio especially 30 min after induction of hypotension in TMT group.
2.Metabolic effects of induced hypotension with trimetaphan and sodium nitroprusside.
Wildsmith JA;Drummond GB;MacRae WR Br J Anaesth. 1979 Sep;51(9):875-9.
In two groups of patients undergoing induced hypotension with sodium nitroprusside or trimetaphan blood concentrations of lactate, pyruvate and standard bicarbonate did not differ significantly between the groups. In the nine patients who received trimetaphan there was a progressive, but statistically non-significant, decrease in mean lactate. Nitroprusside (15 patients) was associated with a small increase in mean lactate, but at low dosage there was a small decrease. No relationship to dose rate of nitroprusside was found with these short-term infusions. It is concluded that sodium nitroprusside can be used safely for induced hypotension at doses less than 1.5 mg kg-1 and that simple blood-gas analysis is adequate for the assessment of toxic effects when greater doses are given.
3.[Effect of hypotensive anesthesia on tissue oxygen tension of the heart, kidney and liver].
Hashimoto K;Okazaki K;Okutsu Y;Tateyama T;Okumura F Masui. 1992 Aug;41(8):1267-70.
The effects of hypotensive anesthesia by prostaglandin E1 (PGE1: 8 dogs) or trimetaphan (TMP: 8 dogs) on tissue oxygenation were studied in 16 mongrel dogs anesthetized with pentobarbital. Mean blood pressure (MBP), heart rate (HR), cardiac output (CO), blood gases (BG), the blood flow and tissue oxygen tension of the heart, the kidney and the liver were measured. The blood flow and oxygen tension were measured by electromagnetic flowmeters and by polarographic oxygen electrodes respectively. PGE1 or TMP was injected intravenously to decrease MBP by 30%. MBP, CO, HR and BG of PGE1 were not significantly different with those of TMP. Coronary blood flow decreased for 12% with PGE1 and for 33% with TMP. Though blood flows of the renal and the hepatic arteries were well maintained with PGE1, they decreased for 36% and 34% respectively with TMP. Oxygen tensions of the myocardium (both outer and inner layers) and the liver were well maintained with PGE1. But with TMP, oxygen tension decreased for 23% in outer layer, for 16% in inner layer and for 31% in the liver. Oxygen tension of the kidney remained unchanged with PGE1 and TMP. The results suggest that PGE1 is more useful for the maintenance of the tissue oxygenation than TMP during hypotensive anesthesia.
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CAS 7187-66-8 Trimethaphan

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