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  • Bicarbonate  (2)
  • 23.60  (1)
  • Aortic constriction  (1)
  • 1
    ISSN: 1432-1076
    Schlagwort(e): Key words Term newborns ; Dyspnoea ; Volume expansion ; Bicarbonate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract In a prospective, randomised, open trial 103 term newborns with persisting dyspnoea, tachypnoea and/or cyanosis were treated with oxygen for 5–10 min and then with oxygen plus mask continuous positive airway pressure (CPAP) for another 5–15 min. Cases with overt prenatal or intrapartum obstetric pathology had been excluded from the study. Forty-one infants (40%) responded to this procedure within 10–25 min. The remaining 62 infants (60%) were randomly allocated to one of three forms of further treatment: continuation of mask CPAP for 20 min (group A, n = 24), volume expansion with 9 ml of 3 ml albumin, 3 ml glucose, and 3 mEq of sodium bicarbonate (group B, n = 24), or volume expansion with 4.5 ml albumin and 4.5 ml glucose (group C, n = 14). There was no statistical difference in birth weight, gestational age or Apgar scores at 1 and 5 min between the infants of the groups. Time to normalisation of symptoms was significantly shorter in the volume expansion groups (B: 45 ± 41 min, range 20–180, and C: 80 ± 72 min, range 20–210) than in the mask CPAP group (A: 224 ± 256 min, range 30–1200, P = 0.02). There were statistical differences in umbilical cord and capillary pH values among the infants of the three groups, but the response to therapy was not related to the degree of acidaemia. Thirty-four infants (33%) who did not respond were admitted to a special care unit for further examination (group A: 21/24, group B: 7/24; group C: 6/14). Of these, 23 had no abnormal findings, 8 infants had radiological signs of transitory respiratory distress, and 1 had a non-tension pneumothorax. Septicaemia was found in two infants. No infant was intubated. At discharge all 103 infants did well. Conclusion Incremental application of simple primary care procedures including volume expansion (with or without alkali) in term newborns with persisting postnatal tachypnoea and dyspnoea helps avoid overtreatment and unnecessary separation from the mothers in most cases and reliably selects infants who need close monitoring or special treatment.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-1076
    Schlagwort(e): Term newborns ; Dyspnoea ; Volume expansion ; Bicarbonate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Abstract In a prospective, randomised, open trial 103 term newborns with persisting dyspnoea, tachypnoea and/or cyanosis were treated with oxygen for 5–10 min and then with oxygen plus mask continuous positive airway pressure (CPAP) for another 5–15 min. Cases with overt prenatal or intrapartum obstetric pathology had been excluded from the study. Forty-one infants (40%) responded to this procedure within 10–25 min. The remaining 62 infants (60%) were randomly allocated to one of three forms of further treatment: continuation of mask CPAP for 20 min (group A,n=24), volume expansion with 9 ml of 3 ml albumin, 3 ml glucose, and 3 mEq of sodium bicarbonate (group B,n=24), or volume expansion with 4.5 ml albumin and 4.5 ml glucose (group C,n=14). There was no statistical difference in birth weight, gestational age or Apgar scores at 1 and 5 min between the infants of the groups. Time to normalisation of symptoms was significantly shorter in the volume expansion groups (B: 45±41 min, range 20–180, and C: 80±72 min, range 20–210) than in the mask CPAP group (A: 224±256 min, range 30–1200,P=0.02). There were statistical differences in umbilical cord and capillary pH values among the infants of the three groups, but the response to therapy was not related to the degree of acidaemia. Thirty-four infants (33%) who did not respond were admitted to a special care unit for further examination (group A: 21/24, group B: 7/24; group C: 6/14). Of these, 23 had no abnormal findings, 8 infants had radiological signs of transitory respiratory distress, and 1 had a nontension pneumothorax. Septicaemia was found in two infants. No infant was intubated. At discharge all 103 infants did well. Conclusion Incremental application of simple primary care procedures including volume expansion (with or without alkali) in term newborns with persisting postnatal tachypnoea and dyspnoea helps avoid overtreatment and unnecessary separation from the mothers in most cases and reliably selects infants who need close monitoring or special treatment.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 317 (1981), S. 86-89 
    ISSN: 1432-1912
    Schlagwort(e): Glomerular capillary pressure ; Munich-Wistar rat ; Adenosine ; Ureteral obstruction ; Aortic constriction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The effect of acute ureteral obstruction (UO) and reduction of renal artery pressure (AC) on the adenosineinduced renal vasoconstriction was studied in the Munich-Wistar rat. Infusion of adenosine, 0.05 μmol/min · kg body weight, into the thoracic aorta, was associated with a fall of directly measured glomerular capillary pressure (P gc) from 45.2+1.8 to 32.5+1.7 mm Hg, P〈0.001. Elevation of ureter pressure to 39+2 mm Hg abolished the fall of P gc following adenosine infusion, 51.3+1.7 vs. 50.0+1.3 mm Hg, NS. Reduction of renal artery pressure to 70 mm Hg by an aortic clamp above the renal arteries also prevented the fall of P gc due to adenosine, 36.8+0.9 vs. 36.4+1.8 mm Hg, NS. Administration of indometacin (10 mg/kg i.v.) restored the ability of adenosine to reduce P gc in UO from 41.5+1.1 to 25.9+2.6 mm Hg (P〈0.001) and in AC from 34.0+3.4 to 28.2+75.7 mm Hg (P〈0.02). Since previous studies have demonstrated that in UO and AC renal prostaglandin synthesis is enhanced the effects of indometacin suggest that prostaglandins could be antagonistic to the action of adenosine on the kidney. The data show that the renal vasculature becomes insensitive to the vasoconstrictive action of adenosine during elevated ureter pressure and reduced renal artery pressure.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 324 (1986), S. 271-281 
    ISSN: 1434-601X
    Schlagwort(e): 23.60 ; 21.10H ; 21.10M
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Theγ-radiation from the10B(n,γ) reaction is studied using an unpolarized target. More accurate values for energies of transitions in11B could be determined. No new levels have been found. TheQ value of this reaction: 11,454.1 (2)keV, is in agreement with earlier experiments. Also a new value for the cross section could be derived: 0.29 (4) barn, which is a factor 5 more accurate than earlier experiments. The10B(n, α)7 Li reaction, leading to the 478 keV state in7Li, is studied by means of polarized10B nuclei and polarized neutrons. The resulting anisotropy in the directional distribution of the7Li particles manifests itself in the Doppler broadening of the 478 keV line. Analysis of the line shape directly yields the conclusion, that the reaction proceeds for more than 96% through theJ=7/2 channel of11B in case of destructive channel interference of theJ=5/2 channel. Constructive channel interference is only possible if the reaction proceeds for more than 99.5% through theJ=7/2 channel. It appeared that the outcomingα and7Li particles are emitted predominantly in directions perpendicular to the nuclear orientation axis.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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