Journal of perinatology : official journal of the California Perinatal Association · 2007
Reliability of salivary theophylline in monitoring the treatment for apnoea of prematurity.
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Chereches-Panta P, Nanulescu M V, Culea M, Palibroda N
Аннотация
OBJECTIVE: To evaluate the reliability of salivary levels of theophylline in monitoring therapy of apnoea of prematurity.
STUDY DESIGN: Aminophylline was administered intravenously in 13 infants with apnoea, in a loading dose of 5 mg/kg and maintenance dose of 3 mg/kg, every 8 h. The patients were divided into two groups according to their postconceptional age (PCA): group A, of infants with small PCA (32.8+/-2.0 weeks; n=6 cases), and group B, infants with higher PCA (37.1+/-0.8 weeks; n=7 cases).
RESULTS: A total of 57 paired samples of serum and saliva were obtained in all 13 infants. The mean serum level of theophylline was 7.8+/-5.8 microg/ml and the ratio between serum and salivary concentration of theophylline was 1.53+/-0.28. A strong correlation between the serum and salivary concentration of theophylline (r=0.973) was found. Infants with small PCA had significant higher serum concentration of theophylline than those with higher PCA (10.6 vs 5.3 microg/ml; P=0.0002). The difference between the mean ratios of serum/salivary theophylline levels in the two groups was low (1.44 vs 1.62; P=0.0155).
CONCLUSION: The strong correlation of theophylline in serum and in saliva recommends the salivary levels as a reliable method for monitoring the treatment of apnoea of prematurity.
STUDY DESIGN: Aminophylline was administered intravenously in 13 infants with apnoea, in a loading dose of 5 mg/kg and maintenance dose of 3 mg/kg, every 8 h. The patients were divided into two groups according to their postconceptional age (PCA): group A, of infants with small PCA (32.8+/-2.0 weeks; n=6 cases), and group B, infants with higher PCA (37.1+/-0.8 weeks; n=7 cases).
RESULTS: A total of 57 paired samples of serum and saliva were obtained in all 13 infants. The mean serum level of theophylline was 7.8+/-5.8 microg/ml and the ratio between serum and salivary concentration of theophylline was 1.53+/-0.28. A strong correlation between the serum and salivary concentration of theophylline (r=0.973) was found. Infants with small PCA had significant higher serum concentration of theophylline than those with higher PCA (10.6 vs 5.3 microg/ml; P=0.0002). The difference between the mean ratios of serum/salivary theophylline levels in the two groups was low (1.44 vs 1.62; P=0.0155).
CONCLUSION: The strong correlation of theophylline in serum and in saliva recommends the salivary levels as a reliable method for monitoring the treatment of apnoea of prematurity.