Intraoperative Protective Ventilation for Obese Patients Undergoing Gynaecological Laparoscopic Surgery (Inprove4large)
16 de mayo de 2019 actualizado por: Massimo Antonelli, Catholic University of the Sacred Heart
Intraoperative Protective Ventilation for Obese Patients Undergoing Gynaecological Laparoscopic Surgery. A Single-centre Randomized, Controlled Trial
Background. The use of a comprehensive strategy providing low tidal volumes, peep and recruiting maneuvers in patients undergoing open abdominal surgery improves postoperative respiratory function and clinical outcome. It is unknown whether such ventilatory approach may be feasible and/or beneficial in patients undergoing laparoscopy, as pneumoperitoneum and Trendelenburg position may alter lung volumes and chest-wall elastance.
Objective. The investigators designed a randomized, controlled trial to assess the effect of a lung-protective ventilation strategy on postoperative oxygenation in obese patients undergoing laparoscopic surgery.
Descripción general del estudio
Estado
Terminado
Condiciones
Tipo de estudio
Intervencionista
Inscripción (Actual)
60
Fase
- No aplica
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.
Ubicaciones de estudio
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Rome, Italia, 00100
- General surgery OR, A. Gemelli hospital
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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
Descripción
Inclusion Criteria:
- scheduled for gynaecological laparoscopic surgery in the Trendelenburg position
- Obesity with body mass index>35 kg/m^2
- written informed consent
Exclusion Criteria:
- Clinical history or signs of chronic heart failure
- history of neuromuscular disease
- history of thoracic surgery
- pregnancy
- chronic respiratory failure requiring long-term oxygen administration
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
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: Protective ventilation
Volume controlled ventilation with tidal volume 6-7 ml/kg of predicted body weight (45.5 + 0.91 (height [cm] -152.4)),
FiO2 0.4 and PEEP 10 cmH2O during the whole study period.
Respiratory rate will be titrated to keep end-tidal CO2 values between 30 and 40 mmHg.
I:E ratio will be set in order to obtain an inspiratory time of 0.8 seconds and an inspiratory pause of 0.3 seconds and FiO2 will be kept unchanged during the whole study period.
In patients in this group, recruiting maneuvers will be performed throughout a stepwise 5 cmH2O PEEP increase every 30 seconds to achieve a PEEP of 35 cmH2O during Pressure Controlled Ventilation (10 cmH2O of inspiratory pressure while keeping respiratory rate unmodified), followed by a stepwise 5 cmH2O PEEP reduction every 30 seconds until the baseline set peep is reached.
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Anaesthesia induction will be obtained with i.v.
2-3 mg/kg propofol, 0,6-0,8 mcg/kg fentanyl, and 0.9-1,2 mg/kg rocuronium.
Anaesthesia will be maintained with i.v.
propofol continuous infusion, with a dose titrated to achieve a bi-spectral index value between 40 and 50
Balanced crystalloids will be administered to patients in both groups as a standard rate of 3-5 ml/kg/h.
Treatment of eventual hemodynamic instability will be left to the attending physician
A nasogastric polyfunctional tube (Nutrivent, Sidam, Italy) will be placed after anaesthesia induction in all enrolled patients to measure esophageal pressure, estimate pleural pressure and compute transpulmonary pressure
Lung volume will be measured through nitrogen wash-in wash-out technique and low-flow Pressure-volume curve will be recorded to estimate differences in alveolar recruitment between the two study groups.
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Comparador activo: Standard Ventilation
Volume controlled ventilation with tidal volume 10 ml/kg of PBW (45.5 + 0.91 (height [cm] -152.4)),
FiO2 0.4 and PEEP 5 cmH2O during the whole study period.
Respiratory rate will be titrated to keep end-tidal CO2 values between 30 mmHg and 40 mmHg.
I:E ratio will be set in order to obtain an inspiratory time of 0.8-1 seconds and an inspiratory pause of 0.3 second
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Anaesthesia induction will be obtained with i.v.
2-3 mg/kg propofol, 0,6-0,8 mcg/kg fentanyl, and 0.9-1,2 mg/kg rocuronium.
Anaesthesia will be maintained with i.v.
propofol continuous infusion, with a dose titrated to achieve a bi-spectral index value between 40 and 50
Balanced crystalloids will be administered to patients in both groups as a standard rate of 3-5 ml/kg/h.
Treatment of eventual hemodynamic instability will be left to the attending physician
A nasogastric polyfunctional tube (Nutrivent, Sidam, Italy) will be placed after anaesthesia induction in all enrolled patients to measure esophageal pressure, estimate pleural pressure and compute transpulmonary pressure
Lung volume will be measured through nitrogen wash-in wash-out technique and low-flow Pressure-volume curve will be recorded to estimate differences in alveolar recruitment between the two study groups.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Postoperative oxygenation
Periodo de tiempo: One hour after extubation
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PaO2/FiO2 ratio 1 hour after extubation, while the patient is receiving oxygen through VenturiMask 40%
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One hour after extubation
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Postoperative forced expiratory volume in 1 second (FEV1)
Periodo de tiempo: 48 hours after the end of surgery
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volume exhaled during the first second of a forced expiratory maneuver started from the level of total lung capacity
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48 hours after the end of surgery
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Postoperative forced vital capacity (FVC)
Periodo de tiempo: 48 hours after the end of surgery
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the total amount of air exhaled during a forced expiratory maneuver started from the level of total lung capacity
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48 hours after the end of surgery
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Postoperative Tiffeneau index
Periodo de tiempo: 48 hours after the end of surgery
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computed as FEV1/FVC
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48 hours after the end of surgery
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Postoperative Dyspnea
Periodo de tiempo: 1 hour after surgery
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Dyspnea assessed by Borg dyspnea scale
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1 hour after surgery
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Pulmonary infection
Periodo de tiempo: 24 hours after the end of surgery
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modified clinical pulmonary infection score (mCPIS)
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24 hours after the end of surgery
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Postoperative pulmonary infiltrates
Periodo de tiempo: 24 hours after the end of surgery
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Evaluated with the chest x-ray by two independent clinicians blinded to treatment assignment
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24 hours after the end of surgery
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Intraoperative driving pressure
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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driving pressure, computed as Plateau pressure-PEEP
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during surgery, recorded on a 60-minute basis
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Intraoperative lung driving pressure
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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transpulmonary driving pressure, computed as Transpulmonary end-inspiratory pressure-transpulmonary total end-expiratory pressure
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during surgery, recorded on a 60-minute basis
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Intraoperative oxygenation
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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PaO2/FiO2
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during surgery, recorded on a 60-minute basis
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Intraoperative dead space
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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Approximated as the difference between End-tidal CO2 and PaCO2 divided by PaCO2
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during surgery, recorded on a 60-minute basis
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Lung recruitment
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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lung recruitment/changes in end expiratory lung volume between the two groups
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during surgery, recorded on a 60-minute basis
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Intraoperative blood pressure
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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Arterial blood pressure
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during surgery, recorded on a 60-minute basis
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Intraoperative respiratory system compliance
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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computed as Tidal volume/airway driving pressure
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during surgery, recorded on a 60-minute basis
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Intraoperative lung compliance
Periodo de tiempo: during surgery, recorded on a 60-minute basis
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computed as Tidal volume/lung driving pressure
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during surgery, recorded on a 60-minute basis
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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
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 mayo de 2017
Finalización primaria (Actual)
31 de marzo de 2019
Finalización del estudio (Actual)
31 de marzo de 2019
Fechas de registro del estudio
Enviado por primera vez
12 de mayo de 2017
Primero enviado que cumplió con los criterios de control de calidad
15 de mayo de 2017
Publicado por primera vez (Actual)
17 de mayo de 2017
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
20 de mayo de 2019
Última actualización enviada que cumplió con los criterios de control de calidad
16 de mayo de 2019
Última verificación
1 de mayo de 2019
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- InproveForLarge
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Indeciso
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
producto fabricado y exportado desde los 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. .
Ensayos clínicos sobre Intravenous anesthetic
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Prometic Biotherapeutics, Inc.Atlantic Research GroupTerminadoInmunodeficiencia PrimariaEstados Unidos