A Case Study Report on Severe Influenza A (H1N1) Infection Complicated by Acute Respiratory Distress Syndrome, Prolonged Mechanical Ventilation, Multidrug-Resistant Secondary Infection, and Successful Recovery of an Adult Patient

Sangeeta Patra, Sucharita Das, Ruchismita Pradhani

Abstract: Background: Influenza A (H1N1) remains a significant cause of severe viral pneumonia and acute respiratory distress syndrome (ARDS), particularly among critically ill patients. Although most patients recover with supportive treatment, some develop life-threatening respiratory failure requiring prolonged intensive care. My case highlights the multidisciplinary management and the pivotal role of critical care nursing in achieving a successful outcome. A 43-year-old male presented to the emergency department with an 8-day history of cough, 7-day history of fever, and progressive shortness of breath for 3 days. On admission, he had severe hypoxemia (SpO? 50% on room air), hypotension (88/50 mmHg), tachypnea (34 breaths/min), and fever (101.2°F). Respiratory multiplex PCR confirmed Influenza A (H1N1). Arterial blood gas analysis demonstrated severe Type I respiratory failure. Despite non-invasive ventilation, worsening respiratory distress required endotracheal intubation and invasive mechanical ventilation. Repeated prone positioning, vasopressor support, lung-protective ventilation, and broad-spectrum antimicrobial therapy were instituted. During ICU stay, the patient developed secondary multidrug-resistant Klebsiella pneumoniae infection and Candida albicans colonization, necessitating targeted antimicrobial therapy. Prolonged ventilatory dependence required tracheostomy. Subsequent imaging revealed bilateral pulmonary fibrosis. Through comprehensive multidisciplinary management, including meticulous nursing care, ventilator-associated pneumonia prevention strategies, physiotherapy, nutritional support, and gradual ventilator weaning, the patient's condition improved. He was successfully decannulated and transferred to the general ward in stable condition. Conclusion: This case demonstrates that early diagnosis, aggressive respiratory support, timely management of secondary infections, and evidence-based critical care nursing can significantly improve outcomes in severe H1N1-associated ARDS despite prolonged ICU admission and multiple complications.

Keywords: Influenza A (H1N1), Acute Respiratory Distress Syndrome, Mechanical Ventilation, Critical Care Nursing, Prone Positioning, Tracheostomy, Multidrug-Resistant Organisms, Case Report

How to Cite?: Sangeeta Patra, Sucharita Das, Ruchismita Pradhani, "A Case Study Report on Severe Influenza A (H1N1) Infection Complicated by Acute Respiratory Distress Syndrome, Prolonged Mechanical Ventilation, Multidrug-Resistant Secondary Infection, and Successful Recovery of an Adult Patient", Volume 15 Issue 8, August 2026, International Journal of Science and Research (IJSR), Pages: 5-8, https://www.ijsr.net/getabstract.php?paperid=SR26728175536, DOI: https://dx.doi.org/10.21275/SR26728175536

Download Citation: APA | MLA | BibTeX | EndNote | RefMan