NCT06493929

Mechanical Power As a Predictor for Weaning in Chronic Obstructive Pulmonary Disease Patients :Prospective Cohort Study.

• Status: Not Yet Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 84 (estimated)
• Sponsor: Assiut University · Academic / Other
• Sex: All
• Age: 18 Years – 100 Years
• Healthy volunteers: Not accepted

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.

Conditions

• Mechanical Power

Interventions

Type	Name	Description
OTHER	Chest ultrasound	to assess diaphragmatic excursion (DE(. M-mode was used to record the movement of the diaphragm during tidal breathing when the sampling line and diaphragm were as vertical as possible (not \< 70°). The data was measured from the first respiratory cycle at 0 min after SBT.
OTHER	Calculation of Mechanical Power on the first day of intubation and before First trial of weaning:	Total respiratory rate (RR). Positive end-expiratory pressure (PEEP) (the external or applied PEEP) recorded, not the total PEEP, or intrinsic PEEP. The plateau pressure (Pplat) was measured during an inspiratory pause on the ventilator. Peak inspiratory pressure (Ppeak) should be obtained while the patient is relaxed, not coughing or moving in bed. MP was calculated according to Gattinoni's simplified mechanical power equation as follows (3,8): MP(J/min)=0.098×VT×RR×(Ppeak-0.5×ΔP).

Timeline

• Start date: 2024-12-01
• Primary completion: 2026-08-01
• Completion: 2026-08-01
• First posted: 2024-07-10
• Last updated: 2024-12-03

Locations

1 site across 1 country: Egypt