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Age‐dependent variations in white adipose tissue glycerol and lactate production after surgery measured by microdialysis in neonates and children
Author(s) -
Hildingsson Ulf,
Lönnqvist PerArne,
Selldén Hans,
Eksborg Staffan,
Ungerstedt Urban,
Marcus Claude
Publication year - 2000
Publication title -
pediatric anesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.704
H-Index - 82
eISSN - 1460-9592
pISSN - 1155-5645
DOI - 10.1046/j.1460-9592.2000.00508.x
Subject(s) - microdialysis , lipolysis , medicine , adipose tissue , white adipose tissue , interstitial fluid , glycerol , subcutaneous adipose tissue , endocrinology , anesthesia , surgery , biochemistry , chemistry , central nervous system
Summary In previous studies, we observed that lactate concentrations in interstitial white adipose tissue are higher in small infants than in adults. Moreover, no lipolysis following catecholamine challenge has been reported in neonates and small infants. Our aim was to determine with microdialysis whether the above mentioned age‐dependent changes could be detected in situ after surgery . A microdialysis catheter was introduced into the abdominal subcutaneous tissue in 13 neonates and 12 children undergoing surgery. Interstitial concentrations of glucose, lactate and glycerol were measured hourly during the first 20 postoperative hours. The concentrations of lactate in interstitial white adipose tissue were consistently higher in neonates compared to older children, with a significant difference during the 9–18 h postoperative period ( P < 0.05). A significant difference in the lactate:glucose ratio was observed at 1–2, 8–10, 15 and 18 h postoperatively ( P < 0.05). No significant differences were observed between the two groups with respect to glycerol and glucose concentrations. Interstitial lactate concentrations in white adipose tissue were higher in neonates compared with children in the early postoperative period. No age‐dependent difference in postoperative lipolysis, measured as interstitial glycerol concentrations, was observed. Thus, an age‐dependent difference in interstitial lactate production, but not lipolysis, was detected in the early postoperative period.