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Barium carbonate intoxication (1991)

Schorn, Th. F. ; Olbricht, Ch. ; Schüler, A. ; [et al.]

Springer

Intensive care medicine 17 (1991), S. 60-62

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ISSN: 1432-1238

Keywords: Barium carbonate intoxication ; Life threatening arrhythmias ; Severe hypokalemia ; Hemodialysis

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract A 22-year-old man attempted to commit suicide by swallowing an unknown amount of barium carbonate dissolved in hydrochloric acid. Shortly after ingestion, he developed crampy abdominal pain and generalized muscle weakness. About 2 h later, respiratory failure ensued necessitating orotracheal intubation and mechanical ventilation. Concomitantly, life-threatening arrhythmias including ventricular fibrillation occurred, and he had to be resuscitated for 45 min. After correction of severe hypokalemia (serum potassium 1.5 mmol/1), cardiac rhythm stabilized. In an attempt to accelerate removal of barium from the circulation hemodialysis was begun. During hemodialysis muscle strength returned. Pharmacokinetic analysis of serum barium levels suggest that hemodialysis shortened the serum half-life of barium. Subsequently, the patient made a complete and uneventful recovery. Our case demonstrates that severe barium poisoning can be survived provided that early aggressive therapeutic measures are undertaken. Hemodialysis seems to be efficacious in the therapy of barium intoxication.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01708412

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ENDOR and triple resonance studies of 1,4-dihydro-1,2,4-benzotriazinyl radicals and 1,4-dihydro-1,2,4-benzotriazine radical cations (1988)

Neugebauer, Franz A. ; Rimmler, Gösta

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 26 (1988), S. 595-600

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ISSN: 0749-1581

Keywords: ENDOR ; Triple resonance spectroscopy ; 1H NMR ; 1,4-Dihydro-1,2,4-benzotriazinyl radicals ; 1,4-Dihydro-1,2,4-benzotriazine radical cations ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: ESR, ENDOR and triple resonance studies of 1,4-dihydro-1,3-diphenyl- (1a) and 3-tert-butyl-1,4-dihydro-1-phenyl-1,2,4-benzotriazinyl (2a) and of the corresponding radical cation 3a (2a protonated at N-4) yielded the magnitude and the sign of almost all of the 1H and 14N hyperfine coupling (HFC) constants. Their assignment was performed using various 2H labelled and/or methyl substituted derivatives. Both radical groups show major hyperfine coupling to the three 14N nuclei. In the uncharged species 1a and 2a, the spin density at N-4 apparently directs the 1H HFC pattern in the 1,2,4-benzotriazinyl component, a(H-5) and a(H-7) being larger than a(H-6) and a(H-8). In the radical cation, on the other hand, N-1, with an unusually large splitting of 9.9 G, is the position of highest spin density which determines the 1H HFC pattern, a(H-6) and a(H-8) being larger than a(H-7).

Additional Material: 5 Ill.