Comparison of the effects of four i.v. anaesthetic agents on polymorphonuclear leucocyte function
| Autor: | F.J. Pearsall, G. Ramsay, S. J. Boom, Ping Zhang, J. A. H. Davidson |
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| Rok vydání: | 1995 |
| Předmět: |
Anesthetics
Dissociative Staphylococcus aureus business.industry Neutrophils Phagocytosis Midazolam Flow Cytometry Respiratory burst Polymorphonuclear leucocyte Cytolysis Anesthesiology and Pain Medicine Anesthesia medicine Humans Ketamine Thiopental Propofol business Whole blood medicine.drug Respiratory Burst |
| Zdroj: | British journal of anaesthesia. 74(3) |
| ISSN: | 0007-0912 |
| Popis: | Initial resistance of bacterial infection is mediated primarily by polymorphonuclear leucocytes (PMN). Anaesthetic agents have been reported to impair various aspects of PMN function. It is possible that the use of these agents to sedate critically ill patients may further compromise an already depressed host defence mechanism. A flow cytometric technique with fresh whole blood from 10 healthy volunteers was used. Phagocytic and respiratory burst activity of PMN incubated for 1 h with either propofol, thiopentone, midazolam or ketamine at both clinical plasma concentrations and 100 times this concentration were determined. Thiopentone at the higher concentration reduced both respiratory burst activity (mean peak channel 50.7 compared with control value of 77.6 (P0.0001)) and phagocytosis (mean peak channel 47.5 compared with 79.9 (P0.0001)). Ketamine at 100 times the clinical plasma concentration also reduced respiratory burst and phagocytosis, but this failed to reach statistical significance (P = 0.10 and P = 0.053, respectively). No significant depression occurred in the other groups. The results suggest that these i.v. anaesthetic agents, at clinically relevant concentrations, have minimal effects on PMN phagocytosis and oxygen free radical production. At higher concentrations thiopentone and ketamine may affect phagocytic function and thiopentone may impair intracellular cytolysis. |
| Databáze: | OpenAIRE |
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