Quantitative Ultrasound Assessment of Gastric Volume in Pregnant Women at Term
Solid food or fluid residue in the stomach is always a major concern when patients need medical procedures under sedation or general anesthesia, due to the high risk of pulmonary aspiration of the stomach contents. This is especially important in emergency procedures, when a fasting period is not observed. The aspiration of the stomach contents into one's lungs can lead to serious complications (such as severe respiratory failure). Information from a bedside ultrasound assessment of the stomach may be a very useful tool to decide whether or not it's safe to proceed, cancel or delay a surgical procedure.
The investigotrs hypothesize that a mathematical model can be constructed to predict clear fluid volume in the stomach of non-labouring pregnant patients, as it has been developed in healthy adult volunteers.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Food residue in the stomach of patients scheduled to have surgery is considered a major risk factor for pulmonary aspiration of gastric contents. The resulting respiratory compromise after aspiration is associated with significant morbidity and mortality. The risk of pulmonary aspiration is especially important in pregnant women, as they may often require surgery without having observed appropriate fasting. A bedside ultrasound assessment of the status of the gastric content would be of great value for the clinician. This technique has recently been shown very promising in non-pregnant patients and it is important to study its feasibility in the pregnant population.
In this study, patients fast overnight and are randomized to the following groups: empty, or various volumes of fluid (50, 100, 200, 300 or 400mL of apple juice before scanning). Their gastric contents are then assessed by an anesthesiologist, using ultrasound. The investigators aim to evaluate a standardized quantitative ultrasound assessment of gastric volume in non-labouring pregnant women.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Ontario
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Toronto, Ontario, Canada, M5G1X5
- Mount Sinai Hospital
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-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Volunteer non-labouring pregnant women at term (≥ 36 weeks)-
- 18 years or older
- ASA Physical Status I-III
- 50-120 kg of weight
- 150 cm of height or taller
- Ability to understand the rationale of the study assessments and to provide signed informed consent
- Written informed consent
Exclusion Criteria:
- Known pre-existing abnormal anatomy of the upper gastrointestinal tract
- History of upper GI tract surgical procedure
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Seul
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Aucune intervention: empty stomach
No fluid will be given to the patient prior to scanning.
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|
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Expérimental: 50mL
50mL of water will be given to the patient prior to scanning
|
l'eau
|
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Expérimental: 100mL
100mL of water will be given to the patient prior to scanning
|
l'eau
|
|
Expérimental: 200mL
200mL of water will be given to the patient prior to scanning
|
l'eau
|
|
Expérimental: 300mL
300mL of water will be given to the patient prior to scanning
|
l'eau
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|
Expérimental: 400mL
400mL of water will be given to the patient prior to scanning
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l'eau
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Correlation between ingested volume and CSA in antrum
Délai: 5-10 minutes
|
The patient will ingest 0, 50, 100, 200, 300 or 400mL of apple juice, and then the cross-sectional area (CSA) will be measured.
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5-10 minutes
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Collaborateurs et enquêteurs
Les enquêteurs
- Chercheur principal: Cristian Arzola, MD, Mount Sinai Hospital
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 13-07
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