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Low dose methylprednisolone prophylaxis to reduce inflammation during one-lung ventilation
- Source :
- Pediatric Anesthesia. 18:857-864
- Publication Year :
- 2008
- Publisher :
- Wiley, 2008.
-
Abstract
- BACKGROUND The specific aim of this study was to examine the efficacy of a low dose of methylprednisolone in minimizing inflammatory response in juvenile piglets when given 45-60 min prior to onset of one-lung ventilation. METHODS Twenty piglets aged 3 weeks were assigned to either the control group (n = 10) or methylprednisolone group (n = 10). The animals were anesthetized and after 30 min of ventilation, they had their left lung blocked. Ventilation was continued via right lung for 3 h. The left lung was then unblocked. Following another 30 min of bilateral ventilation, the animals were euthanized and both lungs were harvested. The methylprednisolone group had a single dose (2 mg x kg(-1)) of methylprednisolone given i.v. 45-60 min prior to onset of one-lung ventilation. Physiological parameters (PaO2, resistance, and compliance) and markers of inflammation (tumor necrosis factor [TNF]-alpha, interleukin [IL]-1beta, IL-6, and IL-8) were measured at baseline and every 30 min thereafter. Lung tissue homogenates from both collapsed and ventilated lungs were analyzed for TNF-alpha, IL-1beta, IL-6, and IL-8. RESULTS The methylprednisolone group had higher partial pressure of oxygen (P = 0.01), lower plasma levels of TNF-alpha (P = 0.03) and IL-6 (P = 0.001) when compared with control group. Lung tissue homogenate in the methylprednisolone group had lower levels of TNF-alpha (P < 0.05), IL-1beta (P < 0.05), and IL-8 (P < 0.05) in both the collapsed and the ventilated lungs. CONCLUSIONS In a piglet model of one-lung ventilation, use of prophylactic methylprednisolone prior to collapse of the lung improves lung function and decreases systemic pro-inflammatory response. In addition, in the piglets who received methylprednisolone, there were reduced levels of inflammatory mediators in both the collapsed and ventilated lungs.
- Subjects :
- Swine
Partial Pressure
Anti-Inflammatory Agents
Inflammation
Respiratory physiology
Methylprednisolone
Random Allocation
Respiration
medicine
Animals
Lung
Tumor Necrosis Factor-alpha
business.industry
Interleukins
Interleukin
respiratory system
Respiration, Artificial
respiratory tract diseases
Treatment Outcome
Anesthesiology and Pain Medicine
medicine.anatomical_structure
Anesthesia
Pediatrics, Perinatology and Child Health
Breathing
Cytokines
Tumor necrosis factor alpha
medicine.symptom
business
Blood Gas Monitoring, Transcutaneous
Biomarkers
medicine.drug
Subjects
Details
- ISSN :
- 14609592 and 11555645
- Volume :
- 18
- Database :
- OpenAIRE
- Journal :
- Pediatric Anesthesia
- Accession number :
- edsair.doi.dedup.....29e5c5d682517726594e5339e1e5c015