Methods: Adults from whom the treating physician planned to take blood cultures and additional blood chemistry tests, in the same venous puncture, were eligible and were randomly assigned to intervention or control arms. The hospital's standard procedure for blood drawing was maintained, except that in the intervention arm, blood was aspirated to a green-capped tube, which was used for regular biochemistry tests, prior to the blood culture.
Results: 423 blood cultures were obtained from 404 patients. 45/404 (11.1%) of the blood cultures yielded microbial growth, with 31 (7.7%) regarded as true pathogens and 14 (3.5%) as contaminants. Detection of true bloodstream infection was similar by the two methods, 16/181 (8.83%) with the ISDT and 15/223 (6.72%) using the standard method. The ISDT was associated with a significantly less isolation of presumed contaminants compared to the standard method, 2/165 (1.2%) vs 12/208 (5.76%), P=0.02.
Conclusion: ISDT, by any medical personnel, through altered order of test tube vs blood culture sampling significantly reduced contamination of blood cultures without loss of diverted blood.
A. Lalezari, None
O. Tel-Zur, None
S. Sinvani, None
Y. Sa’id Abed Al-Dayem, None
A. Moses, None
M. Cohen, None
Y. Oster, None
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