Routine Antiemetic Prophylaxis for Nonfasted Parturients Undergoing Cesarean Sections Under Spinal Anesthesia
Comparative Effectiveness of Routine Antiemetic Prophylaxis in Nonfasted Parturients Undergoing Cesarean Sections Under Spinal Anesthesia: A Prospective Randomized Controlled Trial
The aim of this prospective randomized double-blind study is to compare the effectiveness of routine antiemetic prophylaxis for the prevention of intraoperative nausea and vomiting (IONV) in non-fasted parturients undergoing emergency cesarean section under spinal anesthesia.
Nausea and vomiting are common complications during cesarean delivery performed under spinal anesthesia and may negatively affect maternal comfort and perioperative safety. The incidence of these symptoms may be particularly increased in emergency cesarean sections involving non-fasted (full-stomach) parturients. This study compares two commonly used antiemetic strategies, namely 5-hydroxytryptamine-3 (5-HT3) receptor antagonists and dopamine receptor antagonists, to determine their relative effectiveness in preventing IONV during surgery.
The findings are expected to contribute to optimization of antiemetic prophylaxis protocols, improvement of maternal comfort, and reduction of perioperative complications associated with nausea and vomiting during emergency cesarean delivery.
Aperçu de l'étude
Statut
Statut
Les conditions
Les conditions
Intervention / Traitement
Intervention / Traitement
Description détaillée
This prospective, randomized, double-blind clinical trial is designed to evaluate the comparative effectiveness of routine antiemetic prophylaxis for preventing intraoperative nausea and vomiting in non-fasted parturients undergoing emergency cesarean section under spinal anesthesia.
Eligible participants will be pregnant women with American Society of Anesthesiologists (ASA) physical status I-II who undergo emergency cesarean delivery under spinal anesthesia. Only non-fasted (full-stomach) parturients will be included.
Exclusion criteria include ASA physical status III or higher, preoperative anemia, massive intraoperative hemorrhage, requirement for additional intraoperative hypnotic agents, known gastrointestinal disease, psychiatric disorders or psychotropic medication use, and administration of antiemetic medication within 24 hours before surgery.
Participants will be randomized using a sealed-envelope allocation method before arrival in the operating room. Before transfer to the operating room, patients will receive the assigned study medication according to the randomization protocol. Both patients and the attending anesthesiologist responsible for outcome assessment will remain blinded to group allocation.
Participants will receive one of the following prophylactic antiemetic regimens:
Group O: 5-HT3 receptor antagonist (e.g., ondansetron or equivalent agent) Group M: Dopamine receptor antagonist (e.g., metoclopramide)
Standard monitoring will include electrocardiography, non-invasive blood pressure measurement, and peripheral oxygen saturation (SpO₂). Following intravenous cannulation, Ringer's lactate infusion will be initiated.
Spinal anesthesia will be performed at the L4-L5 interspace using 10 mg hyperbaric bupivacaine. After block placement, patients will be positioned supine with left uterine displacement to minimize aortocaval compression. Supplemental oxygen will be administered via nasal cannula at 2 L/min.
All participants will receive prophylactic intravenous ephedrine 5 mg. Additional 5 mg boluses will be administered if systolic blood pressure decreases below 100 mmHg or more than 20% from baseline values. Intravenous atropine 0.5 mg will be administered in cases of bradycardia (heart rate below 50-60 beats/min).
Following delivery of the fetal shoulders, oxytocin 20 IU will be administered intravenously as an infusion.
Demographic and perioperative data including age, body mass index, fasting duration since last solid food intake, smoking status, and operative duration will be recorded.
Hemodynamic variables (blood pressure and heart rate) will be recorded every 2 minutes until delivery and every 5 minutes thereafter until completion of surgery.
Intraoperative nausea and vomiting will be assessed during three predefined periods:
From 5 minutes after spinal anesthesia until delivery During and immediately after delivery From delivery until skin closure
Severity of nausea and vomiting will be evaluated using the Bellville scoring system:
0 = No nausea
- = Nausea
- = Retching (gagging)
- = Vomiting
Primary Outcome
Incidence of intraoperative nausea and vomiting occurring during and immediately after delivery.
Secondary Outcomes
Incidence and severity of intraoperative nausea and vomiting during the other predefined assessment periods.
Postoperative complications associated with antiemetic therapy
Type d'étude
Type d'étude
Inscription (Estimé)
Inscription
Phase
Phase
- Phase 4
Contacts et emplacements
Coordonnées de l'étude
Coordonnées de l'étude
- Nom: Tolga Karaçay
- Numéro de téléphone: +905458718351
- E-mail: tkaracay35@gmail.com
Lieux d'étude
-
-
Eyyübiye
-
Sanliurfa, Eyyübiye, Turquie (Türkiye), 63040
- Recrutement
- Sanliurfa Education and Research Hospital
-
Contact:
- Tolga Karaçay
- Numéro de téléphone: 05458718351
- E-mail: tkaracay35@gmail.com
-
Chercheur principal:
- Servet Sürmeli, M.D.
-
Sous-enquêteur:
- Tolga Karaçay, M.D.
-
Sous-enquêteur:
- Serkan Solak, M.D.
-
Sous-enquêteur:
- Azer İlbengü Kaptan, M.D.
-
-
Critères de participation
Critère d'éligibilité
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Pregnant women scheduled for emergency cesarean delivery under spinal anesthesia
- Non-fasted (full-stomach) parturients
- American Society of Anesthesiologists (ASA) physical status I-II
- Age ≥ 18 years
- Singleton pregnancy
- Ability to provide written informed consent
Exclusion Criteria:
- ASA physical status III or higher
- Refusal to participate
- Elective cesarean delivery (non-emergency cases)
- Preoperative antiemetic use within 24 hours before surgery
- Known allergy or contraindication to study drugs (ondansetron or metoclopramide)
- Pre-existing gastrointestinal disorders (e.g., severe GERD, gastroparesis, bowel obstruction)
- Psychiatric illness or current use of psychotropic medications
- Preoperative anemia (as defined by institutional threshold, e.g., Hb < 10 g/dL)
- Intraoperative conversion to general anesthesia
- Massive intraoperative hemorrhage (>1000-1500 mL or requiring transfusion, depending on your protocol definition)
- Intraoperative administration of additional sedative or antiemetic agents outside study protocol
- Multiple gestation pregnancies
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: La prévention
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Double
Nombre de bras
Armes et Interventions
Groupe de participants / BrasGroupe de participants / Bras |
Intervention / TraitementIntervention / Traitement |
|---|---|
|
Expérimental: 5-HT3 Receptor Antagonist Group
Participants undergoing emergency cesarean delivery under spinal anesthesia will receive prophylactic administration of a 5-HT3 receptor antagonist before surgery. Intraoperative and early postoperative nausea and vomiting will be assessed. |
Prophylactic intravenous administration of a 5-HT3 receptor antagonist prior to cesarean delivery under spinal anesthesia. |
|
Expérimental: Dopamine Receptor Antagonist Group
Participants undergoing emergency cesarean delivery under spinal anesthesia will receive prophylactic administration of a dopamine receptor antagonist before surgery. Intraoperative and early postoperative nausea and vomiting will be assessed. |
Prophylactic intravenous administration of a dopamine receptor antagonist prior to cesarean delivery under spinal anesthesia. |
Que mesure l'étude ?
Principaux critères de jugement
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Incidence of Intraoperative Nausea and Vomiting Immediately After Fetal Delivery
Délai: Perioperative
|
Incidence of nausea, retching, or vomiting occurring during the immediate period following fetal delivery, assessed using the Bellville scoring system. From fetal delivery until uterine closure. |
Perioperative
|
Mesures de résultats secondaires
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Incidence of Intraoperative Nausea and Vomiting Between Spinal Anesthesia and Fetal Delivery
Délai: Perioperative
|
Incidence of nausea, retching, or vomiting occurring from initiation of spinal anesthesia until fetal delivery.From spinal anesthesia administration until fetal delivery. |
Perioperative
|
|
Incidence of Intraoperative Nausea and Vomiting Immediately Before Fetal Delivery
Délai: Perioperative
|
Incidence of nausea, retching, or vomiting occurring in the late intraoperative period immediately preceding fetal delivery. From uterine incision to fetal delivery |
Perioperative
|
|
Incidence of Intraoperative Nausea and Vomiting During Skin Closure
Délai: Perioperative
|
Incidence of nausea, retching, or vomiting occurring during surgical skin closure. |
Perioperative
|
|
Postoperative Complications Related to Antiemetic Prophylaxis
Délai: Postoperative
|
Incidence of adverse effects associated with prophylactic antiemetic agents including headache, dizziness, hypotension, extrapyramidal symptoms, or sedation. From end of surgery through 24 hours postoperatively. |
Postoperative
|
Collaborateurs et enquêteurs
Parrainer
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Début de l'étude
Achèvement primaire (Estimé)
Achèvement primaire
Achèvement de l'étude (Estimé)
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Première publication
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour publiée
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
- Signes et symptômes digestifs
- Conditions pathologiques, signes et symptômes
- Signes et symptômes
- Vomissement
- Produits chimiques organiques
- Composés hétérocycliques, 1 anneau
- Composés hétérocycliques
- Composés hétérocycliques, 2 anneaux
- Composés hétérocycliques, anneau fusionné
- Azoles
- Hydrocarbures
- Hydrocarbures, cyclique
- Acides carboxyliques
- Acides hydroxy
- Hydrocarbures, aromatique
- Imidazoles
- Amides
- Indoles
- Phénols
- Dérivés de benzène
- Acides, carbocyclique
- para-aminobenzoates
- Aminobenzoates
- Benzoates
- Hydroxybenzoates
- Composés hétérocycliques, 3 ring
- Éthers phényles
- Benzamides
- Chlorobenzoates
- Carbazoles
- Éthers hydroxybenzoate
- Ondansétron
- Métoclopramide
Autres numéros d'identification d'étude
Autres numéros d'identification d'étude
- HRÜ/26.07.15
Informations sur les médicaments et les dispositifs, documents d'étude
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Étudie un produit d'appareil réglementé par la FDA américaine
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