Mechanical Power Versus Diaphragmatic Excursion As a Predictor for Weaning in Chronic Obstructive Pulmonary Disease Patients
- Conditions
- Mechanical Power
- Interventions
- Other: Calculation of Mechanical Power.Other: Measurement Diaphragmatic Excursion after first SBT
- Registration Number
- NCT06510517
- Lead Sponsor
- Assiut University
- Brief Summary
The primary objective is to evaluate the mechanical power as a predictor of weaning of mechanical ventilation in COPD patients hospitalized in the respiratory intensive care unit of Assiut University Hospital.
The secondary objective is to compare between mechanical power and diaphragmatic excursion (DE) assessed by ultrasound as a predictor of weaning in these patients. Also, to investigate the association between MP and DE and mortality in these patients
- Detailed Description
Acute exacerbation of chronic obstructive pulmonary disease (AECOPD), a public health problem that is characterized by persistent airflow limitation ,it develops when there is a significant exposure of irritants causing an inflammatory response in the lungs, it is a common cause of respiratory failure which require hospital admission that is associated with increased medical costs.
The World Health Organization reported that COPD was the fifth most common disease globally in 2020, with a prevalence of 7.8-19.7% in adults. Approximately, 60% of patients with COPD admitted with hypercapnic respiratory failure.
Acute exacerbations of chronic obstructive pulmonary disease (COPD) is characterized by acute worsening of respiratory symptoms associated with the development of severe airflow limitation, gas trapping, dynamic hyperinflation and intrinsic positive end-expiratory pressure (PEEPi). In the most severe cases, these exacerbations may cause acute respiratory failure, which may require mechanical ventilation.
The process of weaning from mechanical ventilation remains one of the most critical challenges in patients underwent mechanical ventilation in the intensive care unit (ICU). The multidisciplinary team must study the optimal time for weaning from the mechanical ventilator as premature weaning may lead to weaning failure and thus increase the risk of hospital acquired infections, costs of care, length of ICU stay, Morbidity and Mortality.
Current guidelines recommend several indices applied at the bedside to predict successful weaning from mechanical ventilation. A spontaneous breathing trial (SBT) is an appropriate way to prepare the patient for extubation; however, even after successful SBT, failure rates and subsequent reintubation can exceed 20% in the highest-risk patient.
Mechanical power (MP) is the energy delivered by the ventilator to the entire respiratory system per time unit and combines all factors affecting the energy load of the respiratory system, including pressure, tidal volume, flow rate and respiratory rate.
MP is primarily calculated as the product of the applied airway pressure and minute ventilation and can be used as an estimate of the workload exerted on the respiratory muscles during spontaneous breathing.
MP is a major determinant to ensure adequate gas exchange in the body and a key factor in assessing the ability of a patient to successfully wean from mechanical ventilation.
Therefore, a larger scale clinical study is needed to further verify the relationship between MP and weaning outcomes in all critically ill mechanically ventilated patients.
Recruitment & Eligibility
- Status
- NOT_YET_RECRUITING
- Sex
- All
- Target Recruitment
- 84
All COPD patients who are mechanically ventilated patients. Must be eligible for weaning according to European respiratory society 2016.
- Patients with Bronchiectasis, interstitial lung diseases, lung scarring.
- Tracheostomized patients.
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Paients with Successful weaning Measurement Diaphragmatic Excursion after first SBT The procedure of weaning from mechanical ventilation will be considered as early as possible. Patients who will be mechanically ventilated \>24 h will be underwent daily screen of subjective and objective indices for assessment of readiness to wean. Weaning will be conducted according to European Respiratory Society guidelines (ERS) (5). The criteria for successful extubation: successful extubation was defined as the ability to maintain spontaneous breathing for at least 48 h, without any ventilatory support. Patients with failed weaning Calculation of Mechanical Power. the reconnection to ventilator (invasive or noninvasive) within 48 h due to respiratory failure or other reasons. Extubation and the reconnection to ventilator were all based on SBT results and physicians' decision (5,9). Patients with failed weaning Measurement Diaphragmatic Excursion after first SBT the reconnection to ventilator (invasive or noninvasive) within 48 h due to respiratory failure or other reasons. Extubation and the reconnection to ventilator were all based on SBT results and physicians' decision (5,9). Paients with Successful weaning Calculation of Mechanical Power. The procedure of weaning from mechanical ventilation will be considered as early as possible. Patients who will be mechanically ventilated \>24 h will be underwent daily screen of subjective and objective indices for assessment of readiness to wean. Weaning will be conducted according to European Respiratory Society guidelines (ERS) (5). The criteria for successful extubation: successful extubation was defined as the ability to maintain spontaneous breathing for at least 48 h, without any ventilatory support.
- Primary Outcome Measures
Name Time Method Calculation of Mechanical Power before first trial of extubation. 30 days Calculation of Mechanical Power before first trial of extubation for every mechanically ventilated patient before first trial of extubation.
- Secondary Outcome Measures
Name Time Method value of Mechanical Power in died patients. 30 days Mechanical Power as a predictor of patient's mortality.
calculation of Mechanical Power in every Patients suffered from ventilator induced lung injury. 30 days calculation of Mechanical Power and the number of Patients suffered from ventilator induced lung injury so study association between value of MP and possibility of VILI to be occurred.
Calculation of other parameters of weaning as Respiratory rate, Rapid shallow breathing index and expiratory tidal volume. 30 days Correlation analysis between mechanical power and other parameters of weaning in evaluation of prognosis in COPD patients.
number of days for hospital stay and ICU stay for every Mechanically ventilated patients. 30 days calculation of mechanical power and duration of hospital stay and ICU stay for each patient.