DIAGNOSTIC BRONCHOSCOPY FOR EVALUATION OF CONGENITAL STRIDOR:A CASE SERIES

Introduction: Stridor is a noise mechanically produced through partially occluded airway. Airway obstruction may be extrathoracic or intrathoracic. Stridor may be congenital or acquired. Timing in respiratory cycle determines anatomic location of lesion – inspiratory, biphasic, or expiratory. Gold standard for diagnosis is bronchoscopy which requires general anaesthesia in infants and small children. Major anaesthetic concerns are – possible difficult airway, sharing of an already compromised airway, airway oedema. Case Description: 40 infants, 0 - 6 months age, with history of noisy breathing suggestive of congenital stridor, planned for diagnostic rigid bronchoscopy with or without therapeutic procedure, over one year period. Preoperative treatment – humidified oxygen, nebulization, dexamethasone, antibiotics, anti-reflux medication. Not premedicated, standard monitors applied. Induction of anaesthesia with inhalational oxygen and sevoflurane or intravenous propofol, fentanyl 1 mcg/kg, dexamethasone 0.5 mg/kg. Topical lidocaine 2% sprayed at vocal cords. 100% oxygen with propofol infusion for maintenance with spontaneous ventilation via nasopharyngeal airway. Patients requiring surgical intervention intubated using microcuffed endotracheal tube. Patients observed post-operatively. If ventilation was inadequate, intubated to control airway during recovery, extubated on restoration of spontaneous ventilation. After surgical intervention, babies shifted to ICU for elective ventilation for 48 hours. Discussion: On bronchoscopy, laryngomalacia was the finding in majority of cases. Others had subglottic stenosis, tracheomalacia, vocal-cord paresis, laryngeal cyst. Out of 40 patients, 9 underwent therapeutic procedure and were electively ventilated, 26 resumed spontaneous breathing, 2 patients had delayed recovery and 2 had severe chest retractions and desaturations and they were managed accordingly. One baby aged 6 months diagnosed with grade III subglottic stenosis desaturatedand tracheostomy had to be done. Conclusion:Anaesthesia for rigid diagnostic bronchoscopy is a significant challenge. Rigid bronchoscopy under general anaesthesia requires multidisciplinary approach and close cooperation between all team members.

Massive pneumomediastinum following orotracheal intubation in an emergency setting

We admitted in our intensive care unit, a 34-year old, Female patient from the emergency room, with a hypothesis of COVID-19 disease, who was intubated before transportation due to hypoxemic respiratory insufficiency. In physical examination the patient showed a massive subcutaneous emphysema. A computed tomography confirmed the hypothesis of pneumomediastinum/pneumothorax (Figure 1A). Refractory hypoxemia issued despite optimized mechanical ventilation, so we opted to submit the patient to Extracorporeal Membrane Oxygenation (ECMO). A diagnostic bronchoscopy showed an important laceration of the trachea (Figure 1B, black arrow, and Figure 1C), near the carina. Despite rare, tracheal lesion after intubation may have a dramatic outcome.

Missed foreign body inhalation for 15-years

Background: Foreign body inhalation is a life threating event in children and it is common in our country ,which is a daily practice of Thoracic .It can lead to morbidity even mortality in the hands of untrained or not well- trained doctors. Aim: Is to report a case of missed foreign body inhaled 15-years back, which is uncommonly reported in the literatures and to compare it with other studies reporting similar cases. Methods: The details, presentation, clinical findings, radiological appearance and the successful removal by a rigid bronchoscope under general anesthesia will be presented. Results: The successful removal of this long standing impacted foreign body (plastic whistle) using the rigid bronchoscope and the eventful outcome of patient’s clinical symptoms is elucidated. Conclusion: Refractory respiratory symptoms of long duration without improvement justify the need for diagnostic bronchoscopy which will offers the best chance of cure in missed foreign body inhalation.

Multimodale Bronchoskopie in der Rundherddiagnostik: Gewinnbringende Kombinationen ausloten

There are cases of peripheral lung nodules that are difficult to approach despite using ancillary diagnostic devices during multimodal bronchoscopy. The use of ultrathin bronchoscopes has shown superiority over standard thin bronchoscopes. We retrospectively evaluated whether substitution of the thin-bronchoscope by the ultrathin device during multimodal bronchoscopy improves lesion ultrasound visualization and diagnostic yield in patients with difficult-to-approach pulmonary lesions. The study comprised 44 out of 338 patients that underwent multimodal bronchoscopy at Matsusaka Municipal Hospital. The thin-bronchoscope with an external diameter of 4 mm was substituted by the ultrathin-bronchoscope with an external diameter of 3 mm when the radial endobronchial ultrasound showed that the probe position was not within the target lesion. The median diameter of the pulmonary tumors was 17.5 mm (range: 6.0–5.2.0 mm). The endobronchial ultrasound showed the probe’s position adjacent to the lesion in 12 cases and no visible lesion in 32 cases using a thin-bronchoscope. However, the endobronchial ultrasound views changed from adjacent to the lesion to within the lesion in nine cases, from no visible lesion to within the lesion in 17 cases, and from no visible lesion to adjacent to the lesion in nine cases after bronchoscope substitution. After substitution, the diagnostic yield was 80.8% in cases with the radial probe within the target lesion, 72.7% in cases with the probe adjacent to the target lesion, and 0% in cases with no visible lesion. The overall diagnostic yield was 65.9% after bronchoscope substitution. The substitution of the thin bronchoscope by the ultrathin device on a need basis improves the position of the radial endobronchial ultrasound probe and diagnostic yield of pulmonary lesions during multimodal diagnostic bronchoscopy.

A 10-year-old Child with Severe Subglottic Stenosis Following Intubation: A Case Report

Background: Subglottic stenosis is among the most common airway problems in children, i.e., acquired or congenital. More than 90% of acquired cases are secondary to endotracheal intubation and occur iatrogenically. Subglottic stenosis is an unexpected problem that requires timely diagnosis and intervention. Most cases of subglottic stenosis in children are mild to moderate. Case Presentation: The presented patient was a 10-year-old child who, after long intubation due to head trauma following early discharge from the surgical center, was referred to the Children’s Hospital on the same day with a complaint of high fever and shortness of breath. With the development of respiratory distress and cyanosis, the patient was transferred to the intensive care unit. Due to the impossibility of passing the tracheal tube with the appropriate age for the patient, the initial diagnosis of subglottic stenosis was established and a tracheostomy was performed. Diagnostic bronchoscopy confirmed severe subglottic stenosis, and the child was referred to a specialized Ear, Nose, Throat (ENT) center for the repair of the tracheal stenosis. Conclusion: One of the most common causes of stridor in children is subglottic stenosis following prolonged intubation. Recognizing the predisposing factors, prevention, strong clinical suspicion, timely diagnosis, and treatment can prevent further adverse complications or consequences in children.

Evaluation Of The Diagnostic Value Of Electromagnetic Navigational Guided Targeted-Bronchoalveolar Lavage In The Diagnosis Of Lung Cancer

Electromagnetic Navigation Bronchoscopy (ENB) is recommended for the evaluation of Peripheral Pulmonary Nodules (PPNs). Current diagnostic bronchoscopy and pulmonary nodule evaluation guidelines do not establish recommendations regarding the role of individual tissue acquisition techniques, the ideal combination or sequence of executing them to optimize diagnostic yield.

Use of Ultrathin Bronchoscope on a Need Basis Improves Diagnostic Yield of Difficult-to-Approach Pulmonary Lesions

There are cases of peripheral lung nodules that are difficult to approach despite using ancillary diagnostic devices during multimodal bronchoscopy. The use of ultrathin bronchoscopes has shown superiority over standard thin bronchoscopes. We retrospectively evaluated whether substitution of the thin-bronchoscope by the ultrathin device during multimodal bronchoscopy improves lesion ultrasound visualization and diagnostic yield in patients with difficult-to-approach pulmonary lesions. The study comprised 44 out of 338 patients that underwent multimodal bronchoscopy at Matsusaka Municipal Hospital. The thin-bronchoscope with an external diameter of 4 mm was substituted by the ultrathin-bronchoscope with an external diameter of 3 mm when the radial endobronchial ultrasound showed that the probe position was not within the target lesion. The median diameter of the pulmonary tumors was 17.5 mm (range: 6.0–5.2.0 mm). The endobronchial ultrasound showed the probe's position adjacent to the lesion in 12 cases and no visible lesion in 32 cases using a thin-bronchoscope. However, the endobronchial ultrasound views changed from adjacent to the lesion to within the lesion in nine cases, from no visible lesion to within the lesion in 17 cases, and from no visible lesion to adjacent to the lesion in nine cases after bronchoscope substitution. After substitution, the diagnostic yield was 80.8% in cases with the radial probe within the target lesion, 72.7% in cases with the probe adjacent to the target lesion, and 0% in cases with no visible lesion. The overall diagnostic yield was 65.9% after bronchoscope substitution. The substitution of the thin bronchoscope by the ultrathin device on a need basis improves the position of the radial endobronchial ultrasound probe and diagnostic yield of pulmonary lesions during multimodal diagnostic bronchoscopy.

Assessment of Systemic and Cerebral Oxygen Saturation during Diagnostic Bronchoscopy: A Prospective, Randomized Study

Background. Arterial hypoxemia occurs in about 2.5–69% of cases during fiberoptic bronchoscopy and may necessitate administration of supplemental oxygen. Whether routine supplementary administration is indicated for all patients is a debated issue. In this prospective randomized study, we assessed the incidence of systemic desaturation (SpO2 <90% or a >4% decrease lasting for more than 60 s) and wanted to find out whether cerebral desaturation occurs in parallel with systemic changes. Patients and Methods. 92 consecutive patients scheduled for diagnostic bronchoscopy were randomly assigned to the no oxygen (O2- group), 2 l/min supplemental O2, or 4 l/min supplemental O2 groups. Primary end points were systemic and cerebral desaturation rate during the procedure. Secondary end points were to delineate the main risk factors of systemic and cerebral desaturation. Results. In the entire cohort, systemic desaturation occurred in 18.5% of patients (n = 17), corresponding to 5 patients (16%) in the O2 (−)group, 6 patients (19%) in the 2 l/min group, and 6 patients (20%) in 4 l/min group, respectively. In the O2 (−) group, the probability of desaturation was 41.7 times higher than that in the 2 l/min group ( p = 0.014 s), while there was no difference in the probabilities of desaturation between the 2 l/min and 4 l/min groups ( p = 0.22 ). Cerebral desaturation (more than 20% rSO2 decrease compared to baseline) did not occur in any patients in the three groups. Systemic desaturation developed earlier, and recovery after desaturation was longer in the O2 (−) group. Male gender, smoking, and systemic oxygen saturation at baseline and FEV1% were the most significant factors contributing to systemic desaturation during bronchoscopy. Conclusions. Administration of supplemental oxygen does not prevent systemic desaturation during flexible bronchoscopy, but may contribute to the shortening of desaturation episodes and faster normalization of oxygen saturation. According to our results, 2 l/min supplemental oxygen should routinely be administered to patients throughout the procedure. This trial is registered with NCT04002609