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Target-Controlled Infusion for Caesarean Delivery Under General Anesthesia: From Conventional Pharmacokinetic Models to Physiologically Based Pharmacokinetic Modeling
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Target-Controlled Infusion for Caesarean Delivery Under General Anesthesia: From Conventional Pharmacokinetic Models to Physiologically Based Pharmacokinetic Modeling
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Journal Article
Target-Controlled Infusion for Caesarean Delivery Under General Anesthesia: From Conventional Pharmacokinetic Models to Physiologically Based Pharmacokinetic Modeling
2026
Overview
Target-controlled infusion (TCI) enables the precise delivery of intravenous anesthetics based on pharmacokinetic–pharmacodynamic (PK–PD) models and represents a key component of total intravenous anesthesia (TIVA). However, its use in obstetric anesthesia remains limited, as current TCI algorithms are derived from non-pregnant populations and do not account for pregnancy-related physiological changes or maternal–fetal drug distribution. This narrative review examines the clinical application of TIVA-TCI in caesarean delivery under general anesthesia, summarizing evidence from recent observational studies and national audits, which suggest feasibility but limited adoption in routine obstetric practice. Pregnancy induces significant alterations in drug distribution, protein binding, metabolism, and clearance, which may affect anesthetic pharmacokinetics and fetal exposure. Physiologically based pharmacokinetic (PBPK) modeling is explored as a complementary approach that may improve understanding of maternal–fetal drug disposition by integrating physiological and drug-specific parameters. Although promising, these model-based strategies require further validation before clinical implementation. Overall, current evidence supports the cautious use of TIVA-TCI in selected obstetric settings while highlighting the need for pregnancy-specific pharmacokinetic models and prospective clinical studies.
