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  • 1990-1994  (2)
  • Bielectronic integrals  (1)
  • Central subclavian catheter  (1)
  • 1
    ISSN: 1432-1238
    Keywords: Central subclavian catheter ; Children ; Catheter complications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Complications in 322 percutaneous subclavian vein catheters placed in 272 children by the infraclavicular approach were investigated prospectively. Ages ranged from 4 days to 15 years. Incidents during catheter introduction occurred in 13 cases, and were more common when insertion was on the right side (p〈0.01). Nine (2.8%) required urgent treatment: (6 pneumothorax, 1 hydrothorax, and 2 hemothorax). Anomalous lodging of the catheter tip was more common when insertion was on the right side (p〈0.05). Complications during catheter maintenance were 3 venous thromboses, 3 catheter obstructions, and 7 migrations out of position. There was no significant difference in complications related to age. Catheter cultures were positive in 33 (17%) of 190 catheters cultured (27 through colonization and 6 through catheter-related sepsis).Staph. epidermidis was the organism most frequently isolated (19 cases; 58%). Catheterization time of more than 5 days and catheter-related sepsis were statistically associated (p〈0.05).Staph. epidermidis isolation and duration of cannula use were statistically related (p〈0.01). No catheter-related deaths occurred. We conclude that subclavian vein catheterization is a simple and useful procedure that entails relatively few serious complications when performed by experienced pediatricians.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2234
    Keywords: Atomic orbitals ; LCAO-SCF ; Bielectronic integrals ; Helmholtz equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary An alternative method for the evaluation of matrix elements required in an LCAO-SCF calculation is presented. It is based on the use of solutions of the Helmholtz equation within a spherical domain for expanding charge distributions with boundary conditions devised to make the electrostatic-potential integral particularly simple. This method allows the systematic evaluation of bielectronic integrals to be performed for any type of atomic orbitals.
    Type of Medium: Electronic Resource
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