Lung Abscess with a Refractory Bronchopleural Fistula Saved from Potentially Fatal Sepsis by Omentoplasty and Extracorporeal Membrane Oxygenation

Controlling air leaks during thoracic drainage in patients with lung abscesses caused by bronchopleural fistulas is challenging. To reduce the occurrence of air leaks, positive pressure ventilation should be avoided whenever possible. A 69-year-old man presented with a 10-day history of gradually worsening chest pain. He had lost consciousness and was brought to the emergency room. His SpO2 was approximately 70%, and his systolic blood pressure was approximately 60 mmHg. Chest radiography and computed tomography revealed findings suggestive of a right pyothorax. Therefore, thoracic drainage was performed. However, the patient’s respiratory status did not improve, and his circulatory status could not be maintained. Therefore, extracorporeal membrane oxygenation was introduced after the improvement in circulation by noradrenaline and fluid resuscitation, resulting in adequate oxygenation and ventilation without the use of high-pressure ventilator settings. Subsequently, omentoplasty for a refractory bronchopleural fistula was successfully performed, and the air leak was cured without recurrence of the lung abscess.

Endobronchial valve positioning for alveolar-pleural fistula following ICU management complicating COVID-19 pneumonia

Background The main clinical consequences of severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2) infection are pneumonia and respiratory failure even requiring mechanical ventilation. In this context, the lung parenchyma is highly prone to ventilator-related injury, with pneumothorax and persistent air leak as the most serious adverse events. So far, endobronchial valve (EBV) positioning has proved efficacious in treating air leaks with a high success rate. Case presentation We report, for the first time, two cases of patients affected by SARS-CoV-2-related pneumonia complicated with bacterial super-infection, experiencing pneumothorax and persistent air leaks after invasive mechanical ventilation. Despite the severity of respiratory failure both patients underwent rigid interventional bronchoscopy and were successfully treated through EBV positioning. Conclusions Persistent air leaks may result from lung tissue damage due to a complex interaction between inflammation and ventilator-related injury (VILI), especially in the advanced stages of ARDS. EBV positioning seems to be a feasible and effective minimally invasive therapeutic option for treating this subset of patients.

Unusual pericuff leak around proseal-laryngeal mask airway corrected by clamping gastric drain port: A case report

ProSealTM-Laryngeal Mask Airway (PLMA) (Laryngeal Mask Company, Henley-on Thames, UK) is commonly used for securing the airway with an added advantage over classic LMA as its gastric drain tube allows the insertion of Ryle’s tube and suctioning of gastric contents. The ProSeal LMA is designed in such a way that it allows controlled mechanical ventilation. During controlled mechanical ventilation, air leaks can occur because of positive airway pressures. Air leaks from the gastric drain port are almost always due to the malposition of PLMA. Here, we report a case of air leak from gastric drain port despite correctly placed PLMA and its successful management without removing the device.

Functional Adhesion of Pectin Biopolymers to the Lung Visceral Pleura

Pleural injuries and the associated “air leak” are the most common complications after pulmonary surgery. Air leaks are the primary reason for prolonged chest tube use and increased hospital length of stay. Pectin, a plant-derived heteropolysaccharide, has been shown to be an air-tight sealant of pulmonary air leaks. Here, we investigate the morphologic and mechanical properties of pectin adhesion to the visceral pleural surface of the lung. After the application of high-methoxyl citrus pectin films to the murine lung, we used scanning electron microscopy to demonstrate intimate binding to the lung surface. To quantitatively assess pectin adhesion to the pleural surface, we used a custom adhesion test with force, distance, and time recordings. These assays demonstrated that pectin–glycocalyceal tensile adhesive strength was greater than nanocellulose fiber films or pressure-sensitive adhesives (p < 0.001). Simultaneous videomicroscopy recordings demonstrated that pectin–glycocalyceal adhesion was also stronger than the submesothelial connective tissue as avulsed surface remnants were visualized on the separated pectin films. Finally, pleural abrasion and hyaluronidase enzyme digestion confirmed that pectin binding was dependent on the pleural glycocalyx (p < 0.001). The results indicate that high methoxyl citrus pectin is a promising sealant for the treatment of pleural lung injuries.

Comparison of the outcome of transverse and circumferential capitonnage in surgical treatment of pulmonary hydatid cyst - a single centre study

Background and objectives: The enucleation of the pulmonary hydatid cyst is followed by individual closure of bronchial air leaks and obliteration of the residual pericystic cavity by capitonnage, either by circumferential or interrupted transverse suture. The objective of the study was to compare the surgical outcome of transverse and circumferential capitonnage in terms of postoperative recovery course, residual cavitations, air leaks, cavitatory or pleural collections and the recurrence of primary disease after enucleation of the pulmonary hydatid cyst. Methods: Patients with pulmonary hydatid cyst were included in the study and divided into two groups. Each group consisted of 30 patients. Patients of Group-1 underwent enucleation of the hydatid cyst followed by closure of bronchial air leaks with classical circumferential closure of the cavity and patients of Group-2 had enucleation of the hydatid cyst and closure of the cavity by transverse capitonnage. Results: Ten cases (33.33%) of Group-1 had hospital stay for more than 5 days compared to 4(13.33%) in Group-2 (p=0.03). Out of 30 patients who had undergone circumferential closure of the hydatid cavity, 5 (16.67%) patients had residual cavitatory fluid collection while there was none in the other group. In Group-1, 7 (23.3%) cases had reactionary intrapleural fluid collection compared to 2 (6.6%) in Group-2 (p=0.035). After 3 months of follow-up, 4 patients in circumferential capitonnage had mild haemoptysis and 1 had aspergilloma while no such complication occurred in any patient in the transverse capitonnage group. No recurrence of cyst occurred in any case in both groups. Conclusion: There was a considerable advantage of transverse capitonnage of the hydatid lung cavity after enucleation in terms of short hospital stay, minimal or no reactionary intrapleural or intra cavitatory collections and less air leaks. Ibrahim Med. Coll. J. 2021; 15(2): 13-17

Air leak with COVID-19 – A meta-summary

Introduction There are various reports of air leaks with coronavirus disease 2019 (COVID-19). We undertook a systematic review of all published case reports and series to analyse the types of air leaks in COVID-19 and their outcomes. Methods The literature search from PubMed, Science Direct, and Google Scholar databases was performed from the start of the pandemic till 31 March 2021. The inclusion criteria were case reports or series on (1) laboratory-confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, (2) with the individual patient details, and (3) reported diagnosis of one or more air leak syndrome (pneumothorax, subcutaneous emphysema, pneumomediastinum, pneumoperitoneum, pneumopericardium). Results A total of 105 studies with 188 patients were included in the final analysis. The median age was 56.02 (SD 15.53) years, 80% males, 11% had previous respiratory disease, and 8% were smokers. Severe or critical COVID-19 was present in 50.6% of the patients. Pneumothorax (68%) was the most common type of air leak. Most patients (56.7%) required intervention with lower mortality (29.1% vs. 44.1%, p = 0.07) and intercostal drain (95.9%) was the preferred interventional management. More than half of the patients developed air leak on spontaneous breathing. The mortality was significantly higher in patients who developed air leak with positive pressure ventilation (49%, p < 0.001) and required escalation of respiratory support (39%, p = 0.006). Conclusion Air leak in COVID-19 can occur spontaneously without positive pressure ventilation, higher transpulmonary pressures, and other risk factors like previous respiratory disease or smoking. The mortality is significantly higher if associated with positive pressure ventilation and escalation of respiratory support.