Transplacental Neonatal Transfer of Lidocaine During Urgent Caesarean Delivery (Lidocaine TNT)
Transplacental Neonatal Transfer of Lidocaine During Urgent Caesarean Delivery: the Lidocaine TNT Prospective Multicentre Cohort Study
Lidocaine is commonly administered through an existing labor epidural catheter to provide surgical anesthesia for urgent cesarean delivery. Lidocaine crosses the placenta, and fetal exposure may be influenced by maternal dose, the interval between epidural administration and delivery, and fetal acid-base status.
This prospective multicenter observational cohort study evaluated fetal exposure to lidocaine in women undergoing Lucas category 1 or category 3 cesarean delivery after epidural extension with 2% lidocaine and epinephrine. Lidocaine concentrations were measured in paired umbilical arterial and venous plasma samples collected immediately after delivery. The study compared umbilical cord lidocaine concentrations between the two urgency categories and examined their associations with umbilical pH.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
The Lidocaine TNT study was a prospective observational pharmacokinetic cohort study conducted in two tertiary maternity units of the Hospices Civils de Lyon, France.
Women undergoing Lucas category 1 cesarean delivery, defined by an immediate threat to the life of the woman or fetus, or Lucas category 3 cesarean delivery, defined by the need for early delivery without immediate maternal or fetal compromise, were eligible when surgical anesthesia was obtained by extending a pre-existing labor epidural catheter with 2% lidocaine and epinephrine.
The urgency category was assigned by the attending obstetric team before delivery. In the local color-code system, Lucas category 1 corresponded to red-code cesarean delivery, with a target decision-to-delivery interval below 15 minutes, and Lucas category 3 corresponded to green-code cesarean delivery, with a target interval below 60 minutes.
Epidural extension was performed according to routine clinical practice using lidocaine 2% with epinephrine 1:200,000. The lidocaine dose, timing of administration, use of adjuncts, and need for additional anesthetic supplementation were determined by the attending anesthesia team and were not assigned by the study protocol.
Paired umbilical arterial and venous blood samples were collected immediately after delivery in blood-gas syringes containing dry heparin. After routine blood-gas analysis, residual plasma was stored and subsequently analyzed using liquid chromatography-tandem mass spectrometry.
The primary objective was to compare umbilical arterial and venous plasma lidocaine concentrations between Lucas category 1 and category 3 cesarean deliveries. Secondary objectives were to examine the associations between umbilical pH and the corresponding lidocaine concentrations and to assess whether the relationship between arterial pH and arterial lidocaine concentration differed according to cesarean urgency category.
Arterial and venous lidocaine concentrations were analyzed separately after natural-log transformation. Bayesian Gaussian linear regression models included Lucas category, the corresponding umbilical pH, birth weight, gestational age, and maternal epidural lidocaine dose. A secondary model included an interaction between Lucas category and umbilical arterial pH. Complete-case analyses were performed without imputation of missing data.
Studietype
Inschrijving (Werkelijk)
Contacten en locaties
Studie Locaties
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Lyon, Frankrijk
- Hospices Civils de Lyon
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion criteria Woman aged 18 years or older. Lucas category 1 or category 3 cesarean delivery. Pre-existing labor epidural catheter. Surgical anesthesia obtained by epidural extension using lidocaine 2% with epinephrine.
Participant informed about the secondary use of routinely collected data and residual biological samples.
Absence of opposition to participation in accordance with French regulations.
Exclusion criteria Lucas category 2 cesarean delivery. Elective or prophylactic cesarean delivery not requiring urgent fetal extraction.
Absence of a functioning epidural catheter. Absence of an objective sensory block or effective labor analgesia suggesting epidural catheter failure.
Suspected intrathecal catheter migration or unintentional dural puncture. Cesarean delivery performed under general anesthesia alone. Cesarean delivery performed under spinal anesthesia alone.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Cohorten en interventies
Groep / Cohort |
Interventie / Behandeling |
|---|---|
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Lucas category 1 cesarean delivery
Women undergoing cesarean delivery because of an immediate threat to the life of the woman or fetus.
The locally targeted decision-to-delivery interval was less than 15 minutes.
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Category Lucas 1 cesarian section with the timing of birth < 15 min
Andere namen:
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Lucas category 3 cesarean delivery
Women requiring early cesarean delivery without immediate maternal or fetal compromise.
The locally targeted decision-to-delivery interval was less than 60 minutes.
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Urgent cesarian section within 60 min
Andere namen:
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Umbilical arterial and venous plasma lidocaine concentration
Tijdsspanne: at birth
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Lidocaine concentration measured in plasma obtained from an umbilical venous and arterial blood sample using liquid chromatography-tandem mass spectrometry.
Concentrations are expressed in ng/mL and compared between Lucas category 1 and category 3 cesarean deliveries.
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at birth
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Umbilical venous and arterial pH
Tijdsspanne: at birth
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Umbilical venous and arterial pH measured by routine cord blood-gas analysis.
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at birth
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Andere uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Interaction between cesarean urgency category and umbilical arterial pH
Tijdsspanne: at birth
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Interaction coefficient between Lucas urgency category and umbilical arterial pH in an adjusted Bayesian Gaussian regression model of natural-log-transformed umbilical arterial lidocaine concentration.
This analysis assesses whether the arterial pH-lidocaine concentration relationship differs between Lucas category 1 and category 3 cesarean deliveries.
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at birth
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Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Mikhail DZIADZKO, MD,PhD, Hospices Civils de Lyon
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Studie voltooiing (Werkelijk)
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Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- AGORA 24-5532
Plan Individuele Deelnemersgegevens (IPD)
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