Key result
Cardiovascular surgery without complications was associated with significant 1-hour postoperative increases in growth hormone, glucose, insulin, c-peptide, lactate, and glutamate (all p<0.002).
Why the study?
What is the normal pattern of hormonal and metabolic changes in the first 24 hours following uncomplicated cardiovascular surgery?
Observational (n=13)
What is the normal pattern of hormonal and metabolic changes in the first 24 hours following uncomplicated cardiovascular surgery?
Uncomplicated cardiovascular surgery induces a transient, significant increase in stress hormones and metabolic markers (e.g., glucose, insulin, lactate) that peaks at 1 hour and normalizes within 24 hours.
Answers are grounded in this paper and cite their sources.
Provides reference for expected metabolic response after uncomplicated cardiovascular surgery; hypothesis-generating for deviations predicting complications in future studies.
The use of single predictors for threatening postoperative complications are widely accepted. However, a typical pattern of multiple parameters could be more helpful than a single predictor. To study this hypothesis, various variables of normal postoperative changes in patients without postoperative complications were investigated. Secondly, this pattern needs to be compared in the future with those findings in patients with postoperative complications. Blood parameters of 13 patients undergoing cardiovascular surgery without postoperative complications for 24 hours were evaluated. Samples were obtained on the afternoon before the operation and 1, 3, 6, 12 and 24 hours after the end of surgery. At one hour postoperation increased levels of the following parameters were noted: growth hormone (p < 0.0001), glucose (p < 0.0001), insulin (p < 0.001), c-peptide (p < 0.001), lactate (p < 0.002), glutamate (p < 0.0001), aspartate (p < 0.001) and total amino acids (p < 0.05), although the concentration of some amino acids decreased. Three hours postoperatively free fatty acids (p < 0.05) were increased. Total-T3 concentrations were reduced postoperatively. Other parameters were not altered. Most of the parameters returned to normal values during the period of observation.
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Rümelin et al. (1999) conducted an observational in Cardiovascular surgery (n=13). Cardiovascular surgery vs. Preoperative baseline was evaluated on Hormonal and metabolic variables. Cardiovascular surgery without complications was associated with significant 1-hour postoperative increases in growth hormone, glucose, insulin, c-peptide, lactate, and glutamate (all p<0.002).
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