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Cesarean Anesthesia Blood Gas

6 de octubre de 2026 actualizado por: ali kahvecioğlu, Bagcilar Training and Research Hospital

Effects of Spinal and General Anesthesia Techniques on Maternal-Fetal Blood Gas Gradients and Fetal Carboxyhemoglobin Levels in Cesarean Delivery: A Prospective Observational Cohort Study

This prospective observational cohort study will evaluate maternal and fetal blood gas parameters in women undergoing cesarean delivery under spinal or general anesthesia. Maternal venous blood samples will be obtained immediately before anesthesia induction, and umbilical arterial blood samples will be obtained after delivery and cord clamping. Blood gas parameters, including pH, pCO2, pO2, bicarbonate, base excess, lactate, and fetal carboxyhemoglobin levels, will be compared between the spinal and general anesthesia groups. The study will also evaluate maternal-fetal blood gas gradients, Apgar scores, neonatal intensive care requirements, and the relationship between smoking exposure and fetal carboxyhemoglobin levels.

Descripción general del estudio

Estado

Reclutamiento

Condiciones

Intervención / Tratamiento

Tipo de estudio

De observación

Inscripción (Estimado)

134

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Estudio Contacto

Ubicaciones de estudio

    • Istanbul
      • Istanbul, Istanbul, Turquía (Türkiye), 59050
        • Reclutamiento
        • Bağcılar Training and Research Hospital
        • Contacto:

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

18 años y mayores (Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Femenino

Método de muestreo

Muestra no probabilística

Población de estudio

Pregnant women undergoing cesarean delivery at the Obstetrics and Gynecology Clinic of Bagcilar Training and Research Hospital. The study is a prospective observational cohort comparing maternal and fetal blood gas parameters and fetal carboxyhemoglobin levels according to the observed anesthesia technique (spinal or general anesthesia).

Descripción

Inclusion Criteria:

  • Adult women undergoing cesarean delivery at the study center.
  • Patients receiving spinal or general anesthesia for cesarean delivery.

Exclusion Criteria:

  • Patients who are not eligible for participation according to the study protocol.
  • Patients in whom spinal anesthesia is converted to general anesthesia because of inadequate spinal block and pain during surgery.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Modelos observacionales: COHORT
  • Perspectivas temporales: PROSPECTIVE

Cohortes e Intervenciones

Grupo / Cohorte
Intervención / Tratamiento
Spinal Anesthesia

Participants undergoing cesarean delivery who receive spinal anesthesia as the anesthesia technique.

Observed anesthesia technique in women undergoing cesarean delivery. Participants received either spinal anesthesia or general anesthesia as part of routine clinical care; the anesthesia technique was not assigned by the study.

General Anesthesia

Participants undergoing cesarean delivery who receive general anesthesia as the anesthesia technique.

Observed anesthesia technique in women undergoing cesarean delivery. Participants received either spinal anesthesia or general anesthesia as part of routine clinical care; the anesthesia technique was not assigned by the study.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Umbilical artery pH
Periodo de tiempo: Immediately after delivery

Umbilical arterial pH measured after delivery and cord clamping.

Immediately after delivery

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Maternal venous pH
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous pH measured immediately before anesthesia induction.

Immediately before anesthesia induction
Umbilical artery pCO2
Periodo de tiempo: Immediately after delivery

Umbilical arterial pCO2 measured after delivery and cord clamping.

Immediately after delivery
Umbilical artery pO2
Periodo de tiempo: Immediately after delivery

Umbilical arterial pO2 measured after delivery and cord clamping.

Immediately after delivery
Maternal venous pCO2
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous pCO2 measured immediately before anesthesia induction

Immediately before anesthesia induction
Maternal venous pO2
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous pO2 measured immediately before anesthesia induction

Immediately before anesthesia induction
Umbilical artery HCO3
Periodo de tiempo: Immediately after delivery

Umbilical arterial bicarbonate measured after delivery and cord clamping.

Immediately after delivery
Maternal venous HCO3
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous bicarbonate measured immediately before anesthesia induction

Immediately before anesthesia induction
Umbilical artery BE
Periodo de tiempo: Immediately after delivery

Umbilical arterial base excess measured after delivery and cord clamping

Immediately after delivery
Maternal venous BE
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous base excess measured immediately before anesthesia induction

Immediately before anesthesia induction
Umbilical artery lactate
Periodo de tiempo: Immediately after delivery

Umbilical arterial lactate measured after delivery and cord clamping

Immediately after delivery
Maternal venous lactate
Periodo de tiempo: Immediately before anesthesia induction

Maternal venous lactate measured immediately before anesthesia induction

Immediately before anesthesia induction
Umbilical artery FCOHb
Periodo de tiempo: Immediately after delivery

Fetal carboxyhemoglobin measured in umbilical arterial blood after delivery and cord clamping

Immediately after delivery
Maternal venous FCOHb
Periodo de tiempo: Immediately before anesthesia induction

Maternal carboxyhemoglobin measured in venous blood immediately before anesthesia induction

Immediately before anesthesia induction
Maternal-fetal pH gradient (ΔpH)
Periodo de tiempo: Immediately after delivery

Difference between maternal venous pH and umbilical arterial pH

Immediately after delivery
Maternal-fetal pCO2 gradient (ΔpCO2)
Periodo de tiempo: Immediately after delivery

Difference between maternal venous pCO2 and umbilical arterial pCO2

Immediately after delivery
Maternal-fetal lactate gradient (Δlactate)
Periodo de tiempo: Immediately after delivery

Difference between maternal venous lactate and umbilical arterial lactate

Immediately after delivery
Apgar score at 1 minute
Periodo de tiempo: 1 minute after birth

Apgar score assessed 1 minute after birth using the Apgar score (range, 0-10), with higher scores indicating better neonatal condition.

1 minute after birth
Apgar score at 5 minutes
Periodo de tiempo: 5 minutes after birth

Apgar score assessed 5 minutes after birth using the Apgar score (range, 0-10), with higher scores indicating better neonatal condition.

5 minutes after birth
Neonatal intensive care unit admission
Periodo de tiempo: During the immediate neonatal period

Requirement for admission to the neonatal intensive care unit after birth

During the immediate neonatal period
Neonatal intubation
Periodo de tiempo: During the immediate neonatal period

Requirement for endotracheal intubation after birth

During the immediate neonatal period
Maternal hypotension requiring treatment
Periodo de tiempo: From anesthesia induction until the end of surgery

Occurrence of maternal hypotension requiring pharmacologic treatment during cesarean delivery

From anesthesia induction until the end of surgery
Maternal vasopressor requirement
Periodo de tiempo: From anesthesia induction until the end of surgery

Requirement for vasopressor administration for management of maternal hypotension during cesarean delivery

From anesthesia induction until the end of surgery
Smoking exposure and fetal FCOHb
Periodo de tiempo: Immediately after delivery

Association between maternal smoking exposure status and fetal carboxyhemoglobin level measured in umbilical arterial blood

Immediately after delivery

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Investigadores

  • Investigador principal: Ali KAHVECİOĞLU, MD, University of Health Sciences, Bağcılar Training and Research Hospital

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

1 de octubre de 2026

Finalización primaria (Estimado)

31 de diciembre de 2026

Finalización del estudio (Estimado)

31 de diciembre de 2026

Fechas de registro del estudio

Enviado por primera vez

28 de septiembre de 2026

Primero enviado que cumplió con los criterios de control de calidad

1 de octubre de 2026

Publicado por primera vez (Actual)

6 de octubre de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

8 de octubre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

6 de octubre de 2026

Última verificación

1 de octubre de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • E-10840098-50.04-4657

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .