Complications of bronchoscopy: A concise synopsis

The role of upper airway ultrasonography in tracheal necrosis diagnosis: a case report

BACKGROUND

Tracheal necrosis post endotracheal intubation is a rare life-threatening disease that can compromise airway patency. We demonstrated a novel usage of upper airway ultrasonography (USG) to diagnose tracheal necrosis.

CASE PRESENTATION

A middle-aged smoking male presented with productive cough, noisy breathing and exertional dyspnea for 2 weeks. He was intubated one month prior due to a traumatic brain injury. Upper airway USG findings showed irregular air-mucosal interface (AMI) and comet tail artefacts over the 1st and 2nd tracheal ring. A direct laryngoscopy in the operating room showed thick mucopus inferior to the vocal cords, with necrotic tracheal cartilages and debris obstructing the airway. He was successfully treated with parenteral antibiotics, wound debridement and tracheostomy.

CONCLUSION

Our case highlights the first documented USG findings of tracheal necrosis. Upper airway USG serves as a potential diagnostic modality in managing the condition.

Complications Associated with AMBU™ Scope Use: An FDA MAUDE Analysis

Ambu® aScope™ is a disposable flexible videoscope used for a wide range of medical procedures. However, adverse events associated with this device can occur. The Food and Drug Administration (FDA) Manufacturer and User Facility Device Experience (MAUDE) database was explored for patient-related adverse events associated with Ambu® aScope™ use between January 1, 2000 and December 15, 2023. Search terms included "Ambu" and "Ascope." Thirty unique adverse events were identified. Twenty-one of the events were associated with patient injury, and 9 with device malfunction. Eight patient-reported problems were documented as foreign bodies, 3 events as airway obstruction, desaturation, or hypoxic events, and 1 event as anxiety/cardiac arrest. The remaining 18 reported insufficient information other than associated with patient injury. We found that Ambu® aScope™ flexible nasolaryngoscopes and bronchoscopes are a common and effective tool for airway evaluations that may infrequently serve as a rare form of foreign body with potentially life-threatening consequences.

Elevated serum lactate dehydrogenase aids prediction of mortality in Pneumocystis jirovecii pneumonia without underlying human immunodeficiency virus infection - Derivation of a clinical risk score

Pneumocystis jirovecii pneumonia (PCP) is associated with significant mortality amongst patients without underlying human immunodeficiency virus infection (HIV). We sought to develop a risk score to predict mortality in this population. We reviewed patients with a presumed or confirmed PCP and a negative HIV test from 2006-2023. We constructed a multivariable model to identify parameters independently associated with mortality and the adjusted odds ratios were converted to weights to derive a risk score. Subsequently, we compared the performance of our score to the CURB-65 score by means of area under receiver operating characteristic curve (AUC). In total, we examined 93 patients with PCP without HIV. Mortality was 31.2%. Risk factors for mortality included older age, male sex and high serum lactate dehydrogenase levels (LDH) and C-reactive protein levels. A risk score was derived comprising age> 65 years (2 points), male sex (2 points) and LDH> 770 U/L (3 points). Our risk score (AUC 0.71, 95%CI 0.60-0.82) performed better than the CURB-65 score (AUC 0.53, 95%CI 0.41-0.66). A low-risk score of 0-1 had excellent negative predictive value for mortality (97.5%). In conclusion, a risk score comprising age, sex and LDH can predict mortality in PCP without underlying HIV and help with prognostication.

Flexible and Rigid Bronchoscopy for Critically Ill Children on Extracorporeal Membrane Oxygenation

BACKGROUND

We aim to describe our experience with bronchoscopy to diagnose and relieve tracheobronchial obstruction in anticipation of decannulation in children on extracorporeal membrane oxygenation (ECMO) support.

METHODS

A retrospective cohort study of children on ECMO between 1/2018 and 12/2022.

RESULTS

A total of 107 children required ECMO support during the study period for cardiac (n = 48, 45%), pulmonary (n = 38, 36%), or cardiopulmonary dysfunction (n = 21, 20%). Thirty-seven (35%) patients underwent 99 bronchoscopies while on ECMO. Most (76%, n = 75) experienced no improvement or worsening of chest radiography 24 hours following bronchoscopy. Clinical improvement in tidal volumes 48 hours after the first bronchoscopy was noted in 13/25 patients with available data (p = 0.05). Adverse events were seen in 18 (49%) patients who underwent bronchoscopy, including pneumothorax (n = 8, 22%), pneumonia (n = 7, 19%), pulmonary hemorrhage (n = 6, 16%), and sepsis (n = 5, 14%). ECMO courses were longer (25.4 ± 37.2 vs 6.1 ± 8.8 days, p < 0.0001) and more likely to be complicated by pneumonia (p = 0.0004) and sepsis (p = 0.047) in patients who underwent bronchoscopy compared with those who did not. Adverse events following bronchoscopy were associated with the number of bronchoscopies (p = 0.0003) and the presence of obstructive materials but not with the type of bronchoscopy or indication for ECMO. Mortality rates were similar between patients who underwent bronchoscopy and those who did not.

CONCLUSION

Children requiring bronchoscopy represent a subset of the sickest children on ECMO. Bronchoscopy may provide benefit in children with persistent cardiopulmonary failure who could not otherwise be decannulated. Adverse events are associated with the number of bronchoscopies and the presence of obstructive material.

LEVEL OF EVIDENCE

4 Laryngoscope, 2024.

Point of Care Ultrasound Identification and Aspiration of a Neck Lymph Node

The tissue diagnosis and staging of all types of lung cancer is foundational for prognosis and establishing the optimal treatment plan. In order to appropriately stage lung cancer, the highest stage should be established using the 8th edition TNM criteria, where tumor size (T), nodal involvement (N), and metastasis (M) are all taken into account. Establishing a tissue diagnosis may involve the use of CT guided biopsy, navigational bronchoscopy, endobronchial biopsy, EBUS, percutaneous lymph node biopsy and/or excisional biopsy of supraclavicular nodes. It is recommended to proceed with the method that is considered least invasive and provides the highest staging. We present a case of recurrent lung adenocarcinoma diagnosed with real time ultrasound-guided fine needle aspiration of a neck lymph node.

Patient experience with bronchoscopy: topical versus monitored anesthesia

BACKGROUND

This study aimed to compare patient experiences during bronchoscopy procedures using either topical anesthesia (TA) or monitored anesthesia care (MA). The goal was to identify circumstances where patients could achieve similar levels of tolerance and satisfaction using only TA, especially in resource-limited settings.

METHODS

This study included consecutive patients who underwent bronchoscopy with either TA or MA. Data collected included demographics, indications for bronchoscopy, procedure time, and complications during the procedure. A quality assurance survey was administered to assess patient experience and satisfaction with both procedures. A pre-specified subgroup analysis was performed based on procedure invasiveness and time.

RESULTS

This study enrolled 350 (TA 251; MA 99) patients, with an average age of 65 years. Main indications for bronchoscopy included tumor diagnosis (38%), esophageal cancer staging (18%), and pulmonary infection (17%). The average duration of the procedures was 20 min, with MA being associated with a significantly longer procedure time than TA (31 min vs. 16 min; P < 0.001). The overall satisfaction rating with bronchoscopy was significantly higher in the MA group (visual analogue scale, 8.9 vs. 8.2; P = 0.001). Subgroup analyses showed that when less invasive or shorter procedures were performed, TA patients reported tolerance and satisfaction levels comparable to MA patients.

CONCLUSIONS

Bronchoscopy with MA offered patients a better experience and greater satisfaction; however, in settings with limited resources, TA alone may provide similar levels of patient tolerance and satisfaction during less invasive or shorter procedures.

High-Flow Nasal Cannula Therapy as an Adjuvant Therapy for Respiratory Support during Endoscopic Techniques: A Narrative Review

High-flow nasal cannula (HFNC) is a respiratory support technique that delivers a controlled concentration of oxygen with high flow, heat, and humidity via the nasal pathway. As it has many physiological effects, its use has increased for a variety of clinical indications; however, there is limited guidance on using HFNC as a respiratory support tool during endoscopic procedures. We conducted a narrative review to evaluate the effect of HFNC as an adjuvant tool during fiberoptic bronchoscopy (FOB), upper gastrointestinal tract endoscopy, and surgical procedures in adults. A search of the PubMed and Cochrane databases were performed. Approximately 384 publications were retrieved, and 99 were selected (93 original works and 6 case reports with a literature review). In patients who underwent FOB, HFNC appears to be superior to conventional oxygen therapy (COT) in preventing hypoxaemia. In contrast, for gastrointestinal endoscopy, the current evidence is insufficient to recommend HFNC over COT in a cost-effective manner. Finally, in surgical procedures such as laryngeal microsurgery or thoracic surgery, HFNC has been shown to be a safe and effective alternative to orotracheal intubation. As the results are heterogeneous, we advocate for the need for more quality studies to understand the effectiveness of HFNC during endoscopic procedures.

Efficacy of different respiratory supports to prevent hypoxia during flexible bronchoscopy in patients of COPD: a triple-arm, randomised controlled trial

BACKGROUND

Patients with chronic-obstructive-pulmonary-disease (COPD) undergo bronchoscopy for various reasons, and are at relatively higher risk of complications. This study evaluated the efficacy of non-invasive ventilation (NIV) and high-flow-oxygen-therapy (HFOT) compared with conventional-oxygen-therapy (COT) in patients with COPD undergoing bronchoscopy, to prevent hypoxia.

METHODS

It was a triple-arm, open-label, randomised controlled trial. Ninety patients with COPD were randomly assigned into three intervention arms in 1:1:1 ratio. The incidence of hypoxia, lowest recorded oxygen saturation measured by plethysmography (SpO2), ECG, patient vitals and comfort levels were assessed.

RESULTS

Mean age of the study population was 61.71±7.5 years. Out of 90 cases enrolled, 51, 34 and 5 were moderate, severe and very-severe COPD, respectively, as per GOLD (Global Initiative for Chronic Obstructive Lung Disease) classification. Rest of the baseline characteristics were similar. SpO2 during flexible bronchoscopy (FB) was lowest in COT group (COT: 87.03±5.7% vs HFOT: 95.57±5.0% vs NIV: 97.40±1.6%, p<0.001). Secondary objectives were similar except respiratory-rate (breaths-per-minute) which was highest in COT group (COT: 20.23±3.1 vs HFOT: 18.57±4.1 vs NIV: 16.80±1.9, p<0.001). Whereas post FB partial of oxygen in arterial blood was highest in NIV group (NIV: 84.27±21.6 mm Hg vs HFOT: 69.03±13.6 mm Hg vs COT: 69.30±11.9 mm Hg, p<0.001). Post FB partial pressure of carbon dioxide in arterial blood was similar in the three arms. Operator's ease-of-performing-procedure was least in the NIV group as assessed with Visual Analogue Scale (p<0.01). A higher number of NIV group participants reported nasal pain as compared with the other two arms (p<0.01).

CONCLUSION

NIV and HFOT are superior to COT in preventing hypoxia during bronchoscopy, but NIV is associated with poor patient-tolerance and inferior operator's ease of doing procedure.

TRIAL REGISTRATION NUMBER

CTRI/2021/03/032190.

Unsolicited ejection of an aspirated metallic foreign body in an adult male: Rare case report

INTRODUCTION AND IMPORTANCE

Being an otorhinolaryngological emergency foreign body aspiration (FBA) has continued to be a great challenge to Otorhinolaryngologists. Foreign body inhalation poses life threatening challenges and its uncommon in adult unlike paediatric population. The recommended treatment for the aspirated foreign bodies is bronchoscopy. Unsolicited ejection of an aspirated foreign body is an uncommon encounter in clinical practice and few cases have been reported in the available literatures.

CASE PRESENTATION

A man aged 38-years was attended at the clinic with a history of inhaling a metallic foreign body a day prior visiting our hospital underwent unsolicited ejection following several bouts of dry irritating cough while preparations were in progress to send the patient to an operating theatre for emergency bronchoscopy coupled with removal of the foreign body.

CLINICAL DISCUSSION

The patient underwent unsolicited ejection of the metallic object following several episodes of dry cough and was then counseled to attend the scheduled follow up after 7-days and it was uneventful.

CONCLUSION

Despite being unsafe and not recommended to wait for unsolicited ejection of an aspirated foreign body, meticulous attention should be kept to patients while waiting for bronchoscopy since there are rare chances for unsolicited ejection of such aspirated foreign bodies.

Relapsing polychondritis - A single Centre study in the United Kingdom

INTRODUCTION AND OBJECTIVES

Relapsing Polychondritis (RP) is a rare immune mediated inflammatory disorder that may result in damage and destruction of cartilaginous tissues.

PATIENTS AND METHODS

We retrospectively analysed patients with a clinical diagnosis of RP. Patients were investigated using pulmonary function tests, dynamic high-resolution CT scans, bronchoscopy, laryngoscopy and/or PET-CT scans along with autoimmune serology. Patients had other specialist reviews when indicated.

RESULTS

We identified 68 patients with a diagnosis of RP, 55 (81%) were Caucasian, 8 (12%) Afro Caribbean, 4 (6%) Asian and 1 patient had Mixed Ethnicity. Twenty-nine (43%) had pulmonary involvement and in 16, pulmonary involvement was the initial presentation. The mean age at onset was 44 years (range 17-74). There was a mean diagnostic delay of 55 weeks. 66 (97%) patients received a combination of oral Prednisolone and disease modifying anti-rheumatic drugs. Twelve of 19 (63%) received biologics, with an initial good response, and 10 remain on treatment. 11 patients with respiratory collapse required CPAP to maintain airway patency. Twelve (18%) patients died due to RP and 9 had respiratory complications. Two patients developed myelodysplasia and one had lung carcinoma. In a multivariate regression analysis, the prognostic variables were ethnicity, nasal chondritis, laryngotracheal stricture and elevated serum creatinine.

CONCLUSION

RP is a rare autoimmune condition often associated with significant delays in diagnosis and initiation of treatment. Pulmonary involvement in RP may cause significant morbidity and mortality due to organ damage. Disease modifying anti rheumatic drugs and biologics should be considered early in the disease course to minimise adverse effects of long-term corticosteroid therapy and organ damage.

Understanding the Relationship of the Human Bacteriome with COVID-19 Severity and Recovery

The Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) first emerged in 2019 in China and has resulted in millions of human morbidities and mortalities across the globe. Evidence has been provided that this novel virus originated in animals, mutated, and made the cross-species jump to humans. At the time of this communication, the Coronavirus disease (COVID-19) may be on its way to an endemic form; however, the threat of the virus is more for susceptible (older and immunocompromised) people. The human body has millions of bacterial cells that influence health and disease. As a consequence, the bacteriomes in the human body substantially influence human health and disease. The bacteriomes in the body and the immune system seem to be in constant association during bacterial and viral infections. In this review, we identify various bacterial spp. In major bacteriomes (oral, nasal, lung, and gut) of the body in healthy humans and compare them with dysbiotic bacteriomes of COVID-19 patients. We try to identify key bacterial spp. That have a positive effect on the functionality of the immune system and human health. These select bacterial spp. Could be used as potential probiotics to counter or prevent COVID-19 infections. In addition, we try to identify key metabolites produced by probiotic bacterial spp. That could have potential anti-viral effects against SARS-CoV-2. These metabolites could be subject to future therapeutic trials to determine their anti-viral efficacies.

Preoperative lung ultrasound for confirming the double-lumen endotracheal tube position for one-lung ventilation: A systematic review and meta-analysis

Objectives

Insertion of a double-lumen endotracheal tube (DLT) is the most commonly used method for one-lung ventilation (OLV). This meta-analysis was aimed at investigating the performance of lung ultrasound in assessing the DLT position in OLV.

Methods

Electronic databases were searched for related trials from inception to October 2022. The primary outcome was the performance of ultrasound or clinical evaluation in confirming the correctness of the DLT position, using fiberoptic bronchoscopy or intraoperative direct visualization of lung collapse as the gold standard. The secondary outcome was the time required to confirm or adjust the DTL position.

Results

Five randomized controlled trials and three observational studies involving 771 patients were included in the meta-analysis. The pooled sensitivity and specificity of ultrasound were 0.93 (95% confidence interval [CI]: 0.79-0.98) and 0.61 (95% CI: 0.41-0.77), respectively, while those of clinical evaluation were 0.93 (95% CI: 0.73-0.99) and 0.35 (95% CI: 0.25-0.47), respectively. The pooled procedure duration was 122.27 s (95% CI: 20.85-223.69) with ultrasound and 112.03 s (95% CI: 95.30-128.76) with clinical evaluation. The area under the curve for discriminating the DLT position was 0.86 (95% CI: 0.82-0.88) for ultrasound and 0.52 (95% CI: 0.48-0.57) for clinical evaluation.

Conclusions

Compared to clinical evaluation, ultrasound has a similar sensitivity but a better specificity for confirming the correctness of the DLT position. Ultrasound is an acceptable imaging tool for assessing DTL placement in OLV.

Phage Therapy Administration Route, Regimen, and Need for Supplementary Antibiotics in Patients with Chronic Suppurative Lung Disease

Antimicrobial resistance is leading to increased mortality, posing risk to those with chronic suppurative lung disease (CSLD). One therapeutic option may be to target treatment-resistant bacteria using viruses (bacteriophages [phages]). Currently, patients receiving phage therapy on compassionate grounds may not be receiving optimal treatment as there is no defined approach for phage use. This review aims to explore administration route, regimen, and need for supplementary antibiotics in phage therapy to treat bacterial infection in CSLD. Twelve articles totaling 18 participants included details of numerous phage administration routes with varying regimens. All articles reported an initial reduction of bacterial load or an improvement in patient symptoms, highlighting the potential of phage therapy in CSLD. Fifteen out of 18 used supplementary antibiotics. Standardized protocols informed by high-quality research are necessary to ensure safe and effective phage therapy. In the interim, systematic recording of information within case reports may be useful.

Evaluation and Management of Airway Foreign Bodies in the Emergency Department Setting

BACKGROUND

Airway foreign body can be a life-threatening issue in pediatric and adult patients, and the majority of these patients will first present to the emergency department.

OBJECTIVE

This article provides a narrative review of the diagnosis and management of airway foreign bodies for the emergency clinician.

DISCUSSION

Foreign bodies in the upper and lower airways are potentially life threatening. This affects all age groups but is more common in pediatric patients. A history of a witnessed ingestion or aspiration event should raise the clinical suspicion for an aspirated foreign body. Patients with upper-airway foreign bodies are more likely to present in respiratory distress when compared with lower-airway foreign bodies, which often present with more subtle signs. Stridor, drooling, and wheezing suggest respiratory distress, but the presenting clinical picture is often unclear and may only include a cough. Immediate intervention is required in the patient with hemodynamic instability or respiratory distress. Airway management including laryngoscopy, fiberoptic bronchoscopy, and cricothyrotomy may be needed in these patients, with the emphasis on removing the obstructing foreign body and securing the airway. Specialist consultation can assist in retrieving the foreign body and managing the airway. If the patient is stable, imaging and specialist consultation for potential operating room intervention should be considered.

CONCLUSIONS

An understanding of the presentation, evaluation, and management of the patient with an airway foreign body is essential for emergency clinicians.

[Bronchoscopic management of malignant central airway obstructions]

Up to 30% of lung cancer patients suffer from central airway obstruction, resulting in major deterioration in prognosis and quality of life. Interventional bronchoscopy combines a number of invasive techniques used during rigid bronchoscopy. It is designed to rapidly improve symptoms, primarily dyspnea. Applied according to very precise indications, this technique requires careful patient selection and needs to be incorporated into the multimodal oncological management in combination with systemic treatments, radiation therapy and surgery.

Evaluation of patients' satisfaction with bronchoscopy procedure

BACKGROUND

The bronchoscopy (BS) experience provokes anxiety amongst some patients. It can have a negative impact on the course of the procedure and on the willingness of patients to undergo the next BS in the future.

OBJECTIVE

We aimed to identify factors influencing patients' satisfaction with BS.

METHODS

The prospective study had been conducted between January and June 2019. It included patients hospitalized in our Department, who underwent elective BS. Patients assessed their anxiety and satisfaction level before and after BS using the Visual Analogue Scale (VAS). Data concerning the course of the bronchoscopy was collected.

RESULTS

The median level of anxiety prior to the procedure was moderate, higher in women (p<0.0001). The majority of patients (116/125, 93%) were satisfied with appropriate information before the procedure. Almost one-third of the interviewees (39/125, 31%) declared complete satisfaction (VAS = 0) with their procedure, 17 patients (14%) were dissatisfied (VAS >5/10). Overall 113 (90%) patients declared unconditional consent for future bronchoscopy. Multivariate linear regression analysis revealed two factors affecting patients' satisfaction with bronchoscopy: anxiety prior to BS (standardized regression coefficient β = 0.264, p = 0.003) and discomfort (β = 0.205, p = 0.018). Neither age, degree of amnesia, duration of the procedure nor its type added any significant value as factors affecting patient satisfaction. The most common factors inducing patients' discomfort during BS were local anesthesia of the throat (56/125, 45%) and cough (47/125, 38%).

CONCLUSIONS

Low anxiety level before bronchoscopy and reduced discomfort during the procedure are associated with better patient satisfaction. Thus, it is important to reduce patient anxiety and discomfort during the procedure.

The Impact of High-flow Nasal Cannula vs Other Oxygen Delivery Devices during Bronchoscopy under Sedation: A Systematic Review and Meta-analyses

Background

The widespread diagnostic and therapeutic application of bronchoscopy is often associated with complications like desaturation. This systematic review and meta-analysis intend to scrutinize whether the high-flow nasal cannula (HFNC) is advantageous for providing respiratory support during bronchoscopic procedures under sedation, in comparison with other conventional modalities for oxygen therapy.

Materials and methods

A thorough screening of electronic databases was done till 31st December 2021 after obtaining registration in PROSPERO (CRD42021245420). Randomized controlled trials (RCT), evaluating the impact of HFNC and standard/any other oxygen-delivery devices during bronchoscopy were included in this meta-analysis.

Results

We retrieved in nine RCTs, with a total of 1306 patients, the application of HFNC during bronchoscopy led to decreased number of desaturation spells [relative risk (RR) 0.34, 95% confidence interval (CI) 0.27-0.44, I ² = 23%], higher nadir value of SpO₂ [Mean difference (MD) 4.30, 95% CI 2.41-6.19, I ² = 96%], and improved PaO₂ from baseline (MD 21.77, 95% CI 2.8-40.74, I ² = 99%), along with similar PaCO₂ values (MD -0.34, 95% CI -1.82 to 1.13, I ² = 58%) just after the procedure. However, apart from desaturation spell, the findings are significantly heterogeneous. In subgroup analysis, HFNC had significantly lesser desaturation spells and better oxygenation than low-flow devices, but in comparison to noninvasive ventilation (NIV) had a lower nadir value of SpO₂ with no other significant difference.

Conclusion

High-flow nasal cannula led to greater oxygenation and prevented desaturation spells more effectively in comparison with low-flow devices like nasal cannula, venturi mask, etc., and may be considered as an alternative to NIV during bronchoscopy in certain high-risk patients.

How to cite this article

Roy A, Khanna P, Chowdhury SR, Haritha D, Sarkar S. The Impact of High-flow Nasal Cannula vs Other Oxygen Delivery Devices during Bronchoscopy under Sedation: A Systematic Review and Meta-analyses. Indian J Crit Care Med 2022;26(10):1131-1140.

Assessment of the July Effect on Bronchoscopies in Teaching Hospitals Across the United States

BACKGROUND

The July effect is the perceived notion that at the start of each academic year there is an increase in medical complications as the novice physician begins their new respective roles. Our study evaluated complication rates in the beginning versus end of the academic year with regards to bronchoscopy.

METHODS

This is a retrospective cohort study using the 2016 and 2017 Nationwide Inpatient Sample. Patients in the database that underwent bronchoscopy at teaching hospitals were determined using ICD-10 procedure codes. Our outcomes included length of hospital stay and several bronchoscope complications. We compared our outcomes in the first quarter of the academic year (July, August, and September) to the last quarter (April, May, and June). Multivariable logistic and linear regression analysis were used accordingly to adjust for confounders.

RESULTS

There was a total of 189,720 admission for bronchoscopy. Of these hospitalization 89,020 bronchoscopies were done in first academic Quarter (Q1) while 100,700 bronchoscopies were done in fourth academic Quarter (Q4) in 2016 to 2017 academic year. After adjusting for confounders, there was no difference in any postprocedural complications between Q1 and Q4 or length of stay.

CONCLUSION

Within the limitation of the national data set provided, there appears to be similar procedural complication rates for patients admitted Q1 compared with Q4 of the academic year in respect to bronchoscopy, signaling the possibility of lack of the July effect. Prospective studies with improved data granularity is needed to further verify the absence or presence of the July effect regarding bronchoscopy.

The impact of alfentanil supplementation on the sedation of bronchoscopy: A meta-analysis of randomized controlled trials

BACKGROUND

The efficacy of alfentanil supplementation for the sedation of bronchoscopy remains controversial. We conduct a systematic review and meta-analysis to explore the influence of alfentanil supplementation on the sedation during bronchoscopy.

METHODS

We search PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases through December 2019 for randomized controlled trials (RCTs) assessing the effect of alfentanil supplementation versus placebo for the sedation during bronchoscopy. This meta-analysis is performed using the random-effect model.

RESULTS

Five RCTs are included in the meta-analysis. Overall, compared with control group for bronchoscopy, alfentanyl supplementation is associated with significantly reduced coughing scores (Std. MD = -0.55; 95% CI = -0.96 to -0.14; P = 0.009) and dose of propofol (Std. MD = -0.34; 95% CI = -0.64 to -0.04; P = 0.03), but reveals the increase in hypoxemia (RR = 1.56; 95% CI = 1.17 to 2.08; P = 0.002).

CONCLUSIONS

Alfentanyl supplementation benefits to reduce coughing scores and dose of propofol for bronchoscopy, but increases the incidence of hypoxemia. The use of alfentanyl supplementation for bronchoscopy should be with caution.

Community-Acquired Pneumonia Progressing to Necrotizing Pneumonia Due to Congenital Anatomical Abnormalities in the Lung

Pneumonia is generally a treatable disease but there are instances when physicians are faced with rare circumstances such as congenital structural abnormalities. Structural abnormalities in the lungs may predispose to pneumonia and other complications. We present a patient with pneumonia, which progressed to necrotizing pneumonia. A diagnostic bronchoscopy was performed and identified multiple accessory lobes in the right lung. Multiple accessory lobes are not easily identifiable by diagnostic imaging such as X-rays or computed tomography scans. As a result, treating pneumonia in patients with such structural anomalies can further complicate management. Currently, there is limited information that correlates pneumonia and accessory lobes with necrotizing pneumonia.

Thrombocytopenic patients with hematological malignancy who underwent fiberoptic bronchoscopy are they really under a significant hemorrhagic risk?

Background

Fiberoptic bronchoscopy (FOB) is a very important procedure in hematology clinics. Clinicians often worry about thrombocytopenia before performing FOB because hemorrhagic complications may occur during and after FOB. We have planned a retrospective study about hemorrhagic complications in thrombocytopenic patients who underwent FOB and treated for hematological malignancy. In this study, we have analyzed hemorrhagic complications, which are related to thrombocytopenia, in 114 adult patients who have hematologic malignancy and underwent FOB between January 1, 2005 and October 20, 2015. The platelet counts of all the patients were below 100 × 109/L.

Results

The complications related to FOB were observed in 4 (3.5%) out of 114 patient. Three out of 4 the complications were related to hemorrhage. One out of these 3 patients who occured hemorrhage was in “no bleeding group” according to BTS classification. The other 1 out of these 3 patients was in “mild bleeding” group. No bleeding was observed during FOB in the third patient. Hemoptysis was observed after FOB in the third patient, it was not required replacement and hemoptysis regressed spontaneously.

In this study, we categorized all the patients into three groups. The first group was comprised of 32 patients whose platelet counts were between 0 and 30 × 109/L. The second group was comprised of 47 patients whose platelets counts were between 30 and 50 × 109/L and lastly, the third group was comprised of 35 patients whose platelets counts were between 50 and 100 × 109/L. When we compared the groups to each other, there was no significant difference between these three groups in regards to occurrence of hemorrhagic complications. We observed that there was no significant relationship between thrombocytopenia level and risk of hemorrhagic complications in thrombocytopenic patients who underwent FOB.

Conclusions

In conclusion, this study demonstrated that FOB is safe procedures in thrombocytopenic patients if it is performed in multidisciplinary centers by experienced pulmonologists.

A 12-year experience in endobronchial intervention using rigid bronchoscopy - account of a tertiary referral centre

We describe our experience of rigid bronchoscopy and endobronchial intervention at a single tertiary centre over a 12-year period. All rigid bronchoscopy procedures between July 2008 and July 2020 (inclusive) were reviewed. All procedures were performed in cardiothoracic theatres by a designated team under general anaesthesia. 2135 rigid bronchoscopies were performed on 1301 patients aged between 18 and 93 years. Complications occurred in 24 (1.12%) procedures. There was one fatality (0.05%). Haemorrhage >100mls occurred in seven (0.33%) all of which were successfully managed endobronchially. Ten procedures (0.5%) were complicated by pneumothorax and an intercostal drain was required for eight. Five patients required intensive care admission post operatively, all of whom were subsequently discharged from hospital. One patient had stent migration. To the best of our knowledge, this is amongst the largest single centre collection of data available for endobronchial intervention using rigid bronchoscopy. We show that rigid bronchoscopy is a safe and effective procedure when performed in a high-volume specialist centre with designated lists involving a specialist multidisciplinary team.

Dilation versus laser resection in subglottic stenosis: protocol for a prospective international multicentre randomised controlled trial (AERATE trial)

INTRODUCTION

Subglottic stenosis (SGS) is a rare condition that results from progressive narrowing of the upper airways. Outcomes and treatment options depend on the benign or complex nature of the stenosis. Treatment options for SGS include surgery and endoscopic techniques. The main endoscopic techniques used are dilation and laser resection. Observational and retrospective studies suggest that endoscopic laser resection may be more effective than dilation. We, therefore, aimed to compare the effectiveness of dilation and laser resection in preventing recurrence of SGS.

METHODS AND ANALYSIS

AERATE (dilAtion vs laser Endoscopic Resection in subglottic trAcheal sTEnosis) is a multicentre, investigator-initiated, randomised controlled trial, comparing endoscopic dilation to endoscopic laser resection for simple benign SGS (less than 1 cm long without underlying cartilaginous damage) referred for endoscopic treatment (first treatment or recurrence). The study will be conducted in three centres in France and one in Canada with other centres from France and Canada expected to join. The primary outcome is the recurrence rate of stenosis at 2 years. Recurrence is defined as having a new onset of symptoms along with a stenosis of more than 40% (confirmed by bronchoscopy) requiring a new procedure. A sample size of 100 patients is calculated for the primary endpoint assuming a 10% recurrence rate in the laser resection group and 33% in the dilation group with a statistical significance level of 5%, a power of 80%.

ETHICS AND DISSEMINATION

This study is approved by local and national ethics committees as required. Results will be published, and trial data will be made available.

TRIAL REGISTRATION NUMBER

NCT04719845.

Choice of bronchoscopic intervention working channel for benign central airway stenosis

The purpose of this study is to report our experiences over 12 years with bronchoscopic interventions in patients with benign central airway stenosis using three types of working channels (rigid bronchoscope, laryngeal mask, and endotracheal intubation), with a focus on their related advantages, disadvantages, and postoperative complications. We analyzed the clinical data from 273 patients with benign central airway stenosis who underwent a bronchoscopic intervention. The Wilcoxon rank-sum test was used to analyze the immediate results after the first bronchoscopic intervention, and the Chi-square test was used to analyze the correlation between glottic edema and operation time. The 273 patients underwent a total of 479 bronchoscopic interventions, with satisfactory results. The immediate effective rates of the first bronchoscopic intervention by rigid bronchoscope, laryngeal mask, and endotracheal intubation were 91.4%, 91.3%, and 85.2%, respectively. Postoperative complications related to the working channels included hoarseness, glottic edema, pharyngalgia, paresthesia pharynges, cough, and tooth loss. Glottic edema was the most serious complication, and it occurred in 37.7% (23/61) of the rigid bronchoscope group and 9.8% (32/326) in the laryngeal mask group. And the incidence rate was significantly correlated with the operation time (P < 0.01). Therefore, for patients with benign central airway stenosis, the best choice of working channel during an operation should be made by the operation procedure, lesion location, and pathology of the patients. Shortening the operation time was an important factor in preventing glottic edema.

Foreign Body Aspiration in Egyptian Children Clinical, Radiological and Bronchoscopic Findings

Purpose

Foreign body aspiration (FBA) is a frequent cause of childhood morbidity and mortality. Diagnosis of FBA is challenging in the absence of a witnessed aspiration event. The aim of this study was to determine the accuracy of presenting symptoms as well as physical and radiologic findings as predictors of FBA in children. Thus, indications for bronchoscopy could be determined in such cases.

Methods

This retrospective cohort study was conducted in the ENT department, Kafr-elsheikh University Hospital. The medical records of patients younger than 16 years old who underwent rigid bronchoscopy for suspected FBA were included. Data including age, gender, symptoms, physical examination findings, radiological features, nature and location of foreign body, and outcome of the bronchoscopy were collected.

Results

This study included 130 patients, 105 (80.8%) patients were positive for the presence of a foreign body in their airways. Foreign bodies were most frequently (43.8%) lodged in the right main bronchus, and nuts (66.7%), were the most commonly retrieved. Multivariate regression analysis identified the presence of suggestive signs or symptoms as independent predictors of FBA on rigid bronchoscopy.

Conclusion

Objective finding of clinical signs eg unilateral wheezes on chest examination in the presence of symptoms such as a sudden cough, dyspnea, and hoarseness could predict FBA and help physicians in deciding bronchoscopy.

The Role of Liquid Biopsy in Early Diagnosis of Lung Cancer

Liquid biopsy is an emerging technology with a potential role in the screening and early detection of lung cancer. Several liquid biopsy-derived biomarkers have been identified and are currently under ongoing investigation. In this article, we review the available data on the use of circulating biomarkers for the early detection of lung cancer, focusing on the circulating tumor cells, circulating cell-free DNA, circulating micro-RNAs, tumor-derived exosomes, and tumor-educated platelets, providing an overview of future potential applicability in the clinical practice. While several biomarkers have shown exciting results, diagnostic performance and clinical applicability is still limited. The combination of different biomarkers, as well as their combination with other diagnostic tools show great promise, although further research is still required to define and validate the role of liquid biopsies in clinical practice.

A Before-and-After Study of Evidence-Based Recommendations for On-Call Bronchoscopy

BACKGROUND

Bronchoscopy is widely used and regarded as standard of care in most intensive care units (ICUs). Data concerning recommendations for on-call bronchoscopy are lacking.

OBJECTIVES

Evaluation of recommendations, complications, and outcome of on-call bronchoscopies.

METHOD

A retrospective single-centre analysis was conducted in a large university hospital. All on-call bronchoscopies performed outside normal working hours in the year before (period 1) and after (period 2) establishing a catalogue of recommendations for indications of on-call bronchoscopy on November 1, 2016, were included.

RESULTS

Overall, 924 bronchoscopies in 538 patients were analysed. A relative reduction of 83.6% from 794 bronchoscopies in 432 patients (1.84 per patient) during period 1 to 130 in 107 patients (1.21 per patient) during period 2 was observed. Most bronchoscopies (812/924, 87.9%) were performed in ICUs, and 416 patients (77.3%) were intubated. Bronchoscopies for excessive secretions decreased significantly during period 2. Fifty-three of 130 bronchoscopies (40.8%) fulfilled the specified recommendations during period 2, in comparison with 16.8% in period 1 (p < 0.001). Complications were recorded in 58 of 924 procedures (6.3%) and were more frequent in period 2, especially moderate bleeding. In-hospital mortality of patients undergoing on-call bronchoscopy did not differ between periods and was 28.7 and 30.2% in periods 1 and 2, respectively.

CONCLUSION

The introduction of recommendations for on-call bronchoscopy led to a significant decline of on-call bronchoscopies without negatively affecting outcome. More evidence is needed in on-call bronchoscopy, especially for ICU patients with intrinsic higher complication rates.

Flexible bronchoscopy in a tertiary healthcare facility: a review of indications and outcomes

Objectives

Flexible Fibreoptic bronchoscopy (FFB) is a major diagnostic and therapeutic tool employed largely in respiratory medicine but its use in our country has been quite limited. We performed a retrospective review of the indications, overall diagnostic yield and safety of FFB at the Korle-Bu Teaching Hospital (KBTH).

Study Design

Retrospective study.

Study Setting

Cardiothoracic Unit, Korle-Bu Teaching Hospital.

Study Participants

All bronchoscopy records from January 2017 - December 2018.

Interventions

Eight-five bronchoscopy reports generated over a 2-year period were reviewed. Using a data extraction form, patient's demographic details, indications for FFB, sedation given, specimen obtained and results of investigation, and complications encountered were recorded and entered into SPSS version 22. Descriptive analysis was performed and presented as means and percentages.

Results

Suspected lung cancer was the predominant indication for bronchoscopy requests (55.3%). Diagnostic yield of endobronchial biopsy was 86.7% increased to 93.3% when biopsy was combined with bronchial washing cytology. Bronchial washing geneXpert was positive in 20.8% of sputum negative cases, and 20.7% of patients with unresolved pneumonia and bronchiectasis had a positive microbial yield. Overall mild complications occurred in 5.9% of patients with no mortality.

Conclusion

Flexible bronchoscopy has a significantly high diagnostic yield, particularly in evaluating lung cancers and undiagnosed lung infections with minimal associated complications, hence increasing its availability in the country and widening the diagnostic scope at the cardiothoracic unit of the Korle-Bu Teaching Hospital.

Funding

None declared.

Performance and safety of diagnostic procedures in superior vena cava syndrome

Superior vena cava syndrome (SVCS) is an uncommon condition resulting from extrinsic compression or intraluminal blockade of the superior vena cava. The increased upper body venous pressure results in distended subcutaneous vessels and oedema of the head, neck and arms. SVCS can be a medical emergency if associated with laryngeal or cerebral oedema. The most common SVCS aetiologies are intrathoracic malignancies, accounting for 60 to 86% of cases [1–3].

Standard bronchoscopy and EBUS-TBNA have good diagnostic yield and are relatively safe procedures in the setting of SVCS. However, complications may arise from the underlying malignancy and its proximity to central vital structures.https://bit.ly/37HXFUY

Robust radiogenomics approach to the identification of EGFR mutations among patients with NSCLC from three different countries using topologically invariant Betti numbers

Objectives

To propose a novel robust radiogenomics approach to the identification of epidermal growth factor receptor (EGFR) mutations among patients with non-small cell lung cancer (NSCLC) using Betti numbers (BNs).

Materials and methods

Contrast enhanced computed tomography (CT) images of 194 multi-racial NSCLC patients (79 EGFR mutants and 115 wildtypes) were collected from three different countries using 5 manufacturers’ scanners with a variety of scanning parameters. Ninety-nine cases obtained from the University of Malaya Medical Centre (UMMC) in Malaysia were used for training and validation procedures. Forty-one cases collected from the Kyushu University Hospital (KUH) in Japan and fifty-four cases obtained from The Cancer Imaging Archive (TCIA) in America were used for a test procedure. Radiomic features were obtained from BN maps, which represent topologically invariant heterogeneous characteristics of lung cancer on CT images, by applying histogram- and texture-based feature computations. A BN-based signature was determined using support vector machine (SVM) models with the best combination of features that maximized a robustness index (RI) which defined a higher total area under receiver operating characteristics curves (AUCs) and lower difference of AUCs between the training and the validation. The SVM model was built using the signature and optimized in a five-fold cross validation. The BN-based model was compared to conventional original image (OI)- and wavelet-decomposition (WD)-based models with respect to the RI between the validation and the test.

Results

The BN-based model showed a higher RI of 1.51 compared with the models based on the OI (RI: 1.33) and the WD (RI: 1.29).

Conclusion

The proposed model showed higher robustness than the conventional models in the identification of EGFR mutations among NSCLC patients. The results suggested the robustness of the BN-based approach against variations in image scanner/scanning parameters.

The value of bronchoscopy in patients with non-massive haemoptysis and a clear or benign computer tomogram scan

INTRODUCTION

The preferred diagnostic pathway for patients presenting with non-massive haemoptysis and normal or benign computer tomography (CT) radiological findings is unclear. The common approach is to investigate with both CT and bronchoscopy, irrespective of patient-specific factors. The value of performing fibreoptic bronchoscopy (FOB) in patients with non-massive haemoptysis and clear or benign CT findings remains undetermined. We aimed to investigate its value using a large retrospective case series.

MATERIAL AND METHODS

A retrospective review of 4376 FOBs performed in Northumbria Healthcare NHS Foundation Trust from January 2012 to December 2019 for patients presenting with haemoptysis and clear or benign CT findings. Statistical analysis was performed to describe patient-specific variables, clinical characteristics, pathological findings and subsequent management decisions.

RESULTS

A total of 4376 FOBs were performed during the study period, 275 were indicated to investigate non-massive haemoptysis. Two hundred and fifty-nine patients underwent a CT scan (158 before and 101 after FOB); 16 never had a CT because the treating physician did not feel it was necessary. About 258 CT scans showed normal anatomy. All patients underwent FOB; 192 showed normal findings. Bronchoscopic findings did not alter clinical management in 274 patients. One patient was referred to the ear, nose and throat department following the identification of polypoid vocal cord lesion which, following thorough investigation, was confirmed as benign.

CONCLUSION

FOB provides minimal value for identifying lung malignancies in patients with non-massive haemoptysis and a clear or benign CT scan irrespective of patient-specific risk factors. Cost savings would be associated if physicians altered practice accordingly.

Payment in challenge studies: ethics, attitudes and a new payment for risk model

Controlled Human Infection Model (CHIM) research involves the infection of otherwise healthy participants with disease often for the sake of vaccine development. The COVID-19 pandemic has emphasised the urgency of enhancing CHIM research capability and the importance of having clear ethical guidance for their conduct. The payment of CHIM participants is a controversial issue involving stakeholders across ethics, medicine and policymaking with allegations circulating suggesting exploitation, coercion and other violations of ethical principles. There are multiple approaches to payment: reimbursement, wage payment and unlimited payment. We introduce a new Payment for Risk Model, which involves paying for time, pain and inconvenience and for risk associated with participation. We give philosophical arguments based on utility, fairness and avoidance of exploitation to support this. We also examine a cross-section of the UK public and CHIM experts. We found that CHIM participants are currently paid variable amounts. A representative sample of the UK public believes CHIM participants should be paid approximately triple the UK minimum wage and should be paid for the risk they endure throughout participation. CHIM experts believe CHIM participants should be paid more than double the UK minimum wage but are divided on the payment for risk. The Payment for Risk Model allows risk and pain to be accounted for in payment and could be used to determine ethically justifiable payment for CHIM participants.Although many research guidelines warn against paying large amounts or paying for risk, our empirical findings provide empirical support to the growing number of ethical arguments challenging this status quo. We close by suggesting two ways (value of statistical life or consistency with risk in other employment) by which payment for risk could be calculated.

Comparison of the diagnostic efficacy of the CapitalBio Mycobacterium real-time polymerase chain reaction detection test and Xpert MTB/RIF in smear-negative pulmonary tuberculosis

To compare the diagnostic efficacy of CapitalBio Mycobacterium real-time polymerase chain reaction (RT-PCR) detection test and the first-generation Xpert MTB/RIF in smear-negative pulmonary tuberculosis (PTB). In this retrospective study of smear-negative PTB, we reviewed patient medical records to determine the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under the curve (AUC) of Xpert MTB/RIF, CapitalBio Mycobacterium detection test, and the parallel test (positive result for either of the Xpert MTB/RIF and CapitalBio Mycobacterium detection tests) to evaluate their diagnostic accuracy against a composite reference standard. In total, 1553 patients were evaluated. The sensitivity, specificity, PPV, NPV, and AUC of Xpert MTB/RIF, CapitalBio Mycobacterium detection test, and the parallel test were 57.1%, 92.9%, 81.1%, 95.9%, and 0.75; 53.4%, 97.7%, 98.6%, 41.5%, and 0.76; and 66.2%, 90.8%, 95.5%, 47.7%, and 0.79, respectively. For the bronchoalveolar lavage fluid (BALF) specimens, these values for Xpert MTB/RIF, CapitalBio Mycobacterium detection test, and the parallel test were 68.8%, 97.7%, 99.2%, 43.9%, and 0.83; 61.7%, 97.7%, 99.1%, 38.9%, and 0.80; and 77.0%, 95.5%, 98.6%, 50.9%, and 0.86, respectively. CapitalBio Mycobacterium detection test had moderate accuracy for smear-negative PTB, similar to Xpert MTB/RIF. The parallel test improved the sensitivity. BALF significantly improved the sensitivity and diagnostic accuracy of the test. The maximum diagnostic accuracy for smear-negative PTB was obtained with the parallel test and BALF specimens. BALF was the most effective specimen for diagnosing smear-negative PTB.

Analysis of risk factors for the development of a post-bronchoscopy respiratory infection in lung cancer patients

BACKGROUND

The development of pneumonia following bronchoscopy is a very important post-bronchoscopic complication, while lung abscesses after bronchoscopy are rare. However, bronchoscopic techniques have advanced, and recently, we have observed patients with lung abscess after bronchoscopy. Therefore, the risk factors might vary from those in past reports. This study was performed to identify the incidence of and risk factors for post-bronchoscopy respiratory infections.

METHODS

We retrospectively studied adult patients diagnosed with lung cancer by bronchoscopy at Fukujuji Hospital from January 2017 to June 2019. The infection and noninfection groups were compared. The incidence of lung abscess was compared between recent periods and 2013, when endobronchial ultrasonography with a guide sheath (EBUS-GS) was not yet used in our hospital.

RESULTS

We reviewed 327 patients, including 20 patients (6.1%) with infections. The risk factors for infection were necrosis and/or a cavity in the tumor (p < 0.001), a large tumor diameter (≥30 mm) (p = 0.010), and a low serum albumin level (<4.0 g/dL) (p = 0.010). We developed a predictive score with these risk factors, and the area under the curve was 0.737 (95% Cl: 0.610-0.864). No significant differences in age, current smoking status, or abnormal bronchoscopic findings were observed, although these were previously reported as risk factors. In total, 12 patients had lung abscesses (3.7%), which is a higher incidence than that in 2013 (0.8%).

CONCLUSIONS

The risk factors for developing post-bronchoscopy respiratory infection in our study varied from those in past reports, possibly because of the advancements in bronchoscopic techniques, such as EBUS-GS.

Hemotympanum post-bronchoscopy: An unusual complication!

Diagnostic bronchoscopy with endobronchial ultrasound (EBUS) guided biopsy is the procedure of choice for visualization of bronchial airway and sampling of pulmonary lesions. While complications are relatively uncommon, they typically include hemorrhage, pneumothorax and/or infections. We report an unusual and unique complication, Hemotympanum following endobronchial ultrasound with biopsies. Occasional one or two reported cases of such a complication exist in literature. However, due to rare evidence, minimal awareness exist for its possibility, pathophysiology and measures of prevention.

Risk Factors for Predicting Hypoxia in Adult Patients Undergoing Bronchoscopy under Sedation

BACKGROUND

Flexible bronchoscopy is one of the essential procedures for the diagnosis and treatment of pulmonary diseases. The purpose of this study was to identify the risk factors associated with the occurrence of hypoxia in adults undergoing flexible bronchoscopy under sedation.

METHODS

We retrospectively analyzed 2,520 patients who underwent flexible bronchoscopy under sedation at our tertiary care university hospital in South Korea January 1, 2013-December 31, 2014. Hypoxia was defined as more than 5%-point reduction in the baseline percutaneous oxygen saturation (SpO2) or SpO2 <90% for >1 minute during the procedure.

RESULTS

The mean age was 64.7±13.5, and 565 patients developed hypoxia during the procedure. The mean sedation duration and midazolam dose for sedation were 31.1 minutes and 3.9 mg, respectively. The bivariate analysis showed that older age, a low forced expiratory volume in one second (FEV1), use of endobronchial ultrasound, the duration of sedation, and the midazolam dose were associated with the occurrence of hypoxia during the procedure, while the multivariate analysis found that age >60 (odds ratio [OR], 1.32), a low FEV1 (OR, 0.99), and a longer duration of sedation (>40 minutes; OR, 1.33) were significant risk factors.

CONCLUSION

The findings suggest that patients older than age 60 and those with a low FEV1 tend to develop hypoxia during the bronchoscopy under sedation. Also, longer duration of sedation (>40 minutes) was a significant risk factor for hypoxia.

Incidence, Predictors, Causes, and Cost of 30-Day Hospital Readmission in Chronic Obstructive Pulmonary Disease Patients Undergoing Bronchoscopy

Introduction

Chronic obstructive pulmonary disease (COPD) has a significant disease burden and is among the leading causes of hospital readmissions, adding a significant burden on healthcare resources. The association between 30-day readmission in a COPD patient undergoing bronchoscopy and a wide range of modifiable potential risk factors, after adjusting for sociodemographic and clinical factors, has been assessed, and comparison has been made with COPD patients not undergoing bronchoscopy.

Methods

We conducted a comprehensive analysis of the 2016 Nationwide Readmission Database (NRD) of 30-day all-cause readmission among COPD patients undergoing bronchoscopy. A Cox’s proportional hazards model was used to obtain independent relative risks of readmission following bronchoscopy in COPD patients as compared to patients not undergoing bronchoscopy. Our primary outcome was the 30-day all-cause readmission rate in both groups. Other secondary outcomes of interest were the 10 most common reasons for readmission, resource utilization, independent predictors of readmission, and relative proportion of comorbidities between the index admission (IA) and the readmission in both groups.

Results

The overall rate of readmission following bronchoscopy in COPD patients as compared to patients not undergoing bronchoscopy was 17.32% and 15.87%, respectively. The final multivariate model in the bronchoscopy group showed that the variables found to be an independent predictor of readmission were: pulmonary hypertension (hazard ratio [HR] 2.35; 95% confidence interval [CI] 1.26-4.25; P < .01), adrenal insufficiency (HR 4.47; 95% CI 1.44-13.85; P = .01) and discharge to rehab status. Independent predictor variables of admission in Group B were gender (women < men; HR 0.91; 95% CI 0.88-0.93; P < .01), and type of insurance (Medicaid > Medicare > private insurance).

For all patients undergoing bronchoscopy, the mean length of stay (LOS) for IA was 11.91 ± 20.21 days, and LOS for readmission was 5.87 ± 5.48 days. The mean total cost of IA for patients undergoing bronchoscopy was much higher than that of readmission ($26,916 vs. $12,374, respectively). The entire LOS for readmission was 1,265 days, with a total cost of $2.66 million.

For patients not undergoing bronchoscopy during the IA, mean LOS for IA was 4.26 ± 4.27 days, and mean LOS for readmission was 5.39 ± 5.51 days, which was longer than the IA in Group B but still shorter than LOS for readmission in Group A (patients undergoing bronchoscopy). The mean total cost of readmission was higher than the IA ($8,137 for IA vs. $10,893 for readmission). The total LOS in this group of patients was 313,287 days, with the total cost of readmission at $628 million.

Conclusions

Patients undergoing bronchoscopy have a slightly higher rate of 30-day readmissions as compared to patients not undergoing bronchoscopy, and the LOS is also slightly higher in this group during subsequent readmissions as compared to readmission in patients not undergoing bronchoscopy in IA. The readmission rate in COPD patients is impacted by a variety of social, personal, and medical factors. Patients with multiple medical comorbidities have a higher risk of readmission. In our understanding, bronchoscopy in a patient with acute exacerbation of COPD should be reserved for selected patients, and the rationale should be clarified, as it affects the overall LOS and healthcare expenditure.

Managing Otolaryngologic Complications in Cardiothoracic Surgery

BACKGROUND

Cardiothoracic procedures are often lifesaving operations, and because of their complexity they are not without complications. Although major complications are often recognized and treated immediately, there are many less commonly identified complications that can and frequently should be addressed by otolaryngology colleagues during a patient's hospital course.

METHODS

This comprehensive review describes otolaryngologic complications of cardiac and thoracic surgery.

RESULTS

Dysphonia, dysphagia, stridor, tracheotomy hemorrhage, and pharyngeal tear are all complications of cardiothoracic procedures. Indications for treatment and treatment options are reviewed. The impact on quality of life and long-term morbidity is also discussed.

CONCLUSIONS

Otolaryngologic complications are common after cardiothoracic procedures. An otolaryngologist should be asked to evaluate a patient with dysphonia, dysphagia, or stridor while the patient is an inpatient. Patients experiencing persistent or nonacute problems should be referred to otolaryngologists to discuss more long-term interventions.

The utility of bronchoscopy in immunocompromised patients: a review

Bronchoscopy is an important tool for the diagnosis of pulmonary disorders in immunocompromised patients. The addition of biopsies to bronchoalveolar lavage improves the diagnostic yield of non-infectious etiologies, although the underlying etiology of the immunocompromised state must be considered and may be influential. Certain unknowns remain, including timing of bronchoscopy and its impact on medical management and mortality. The ongoing role of non-invasive testing for infectious complications prior to bronchoscopy also remains to be defined. This review addresses the role of bronchoscopy in immunocompromised states related to underlying hematologic malignancies, prescription drug use or chemotherapy, and other disorders that predispose patients to infectious or non-infectious pulmonary diseases.

Bronchoscopy for Chronic Unexplained Cough: Use of Biopsies and Cultures Increase Diagnostic Yield

BACKGROUND

Prior studies assessing the diagnostic utility of bronchoscopy for chronic unexplained cough have focused primarily on identifying endobronchial anomalies to determine chronic cough etiology. On the basis of our institutional experience, expanding bronchoscopy to include cultures and biopsies can considerably increase its diagnostic yield for identifying the etiology of chronic unexplained cough.

MATERIALS AND METHODS

This retrospective review analyzed bronchoscopies conducted in our institution between 2013 and 2017. Eligibility criteria were bronchoscopies conducted for chronic unexplained cough for which no etiology had been identified before the bronchoscopy. Microbiology, pathology, and cytology results from bronchoscopy were reviewed to identify the etiology of the cough.

RESULTS

Over the study period, 169 bronchoscopies met the eligibility criteria. The average patient age at bronchoscopy was 59.7±14.8 years; 61% were female individuals. Direct visualization identified anatomic etiologies in 48 (28%) patients, most commonly tracheobronchomalacia, and less common conditions, such as tracheobronchopathia osteochondroplastica. Microbiology cultures were positive in 33 (20%) patients, principally Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas aeruginosa, and nontuberculosis mycobacterium. Pathology results from endobronchial biopsies identified respiratory conditions associated with cough, primarily eosinophilic bronchitis (n=15), as well as neurofibromatosis (n=1) and amyloidosis (n=1). Cytology results did not reveal alternate diagnoses not previously identified.

CONCLUSION

Inclusion of bronchial washings and endobronchial biopsies during bronchoscopy for chronic unexplained cough increased diagnostic yield from 28%, attributable to directly visualized anatomic etiologies, to 41%. The addition of microbiology cultures and pathology analysis significantly increased the diagnostic yield of bronchoscopy in identifying the potential etiology of chronic heretofore unexplained cough.

Tooth Aspiration in a Patient with Traumatic Brain Injury

Tooth aspiration is a rare issue in the course of patients with trauma and may remain undiagnosed for a long period, resulting in delayed complications, such as atelectasis and recurrent infections. Flexible bronchoscopy is considered the preferred primary procedure for the management of airway foreign bodies in adults. However, it may cause intracranial hypertension in trauma patients with concomitant head injuries. We herein report a case of a patient with traumatic brain injury who underwent tooth aspiration using flexible bronchoscopy, with continuous monitoring of intracranial pressure (ICP). The importance of a thorough review of radiographs and chest computed tomography for foreign body aspiration in trauma patients was highlighted, particularly in a maxillofacial trauma, as tooth aspiration may remain undiagnosed for extended periods. Moreover, the difficulty in maintaining the ICP within normal limits during bronchoscopy in patients with traumatic brain injury was reinstated, and the need for continuous monitoring of the cerebral hemodynamics and harmonization was emphasized, with recommendations for bronchoscopy via an endotracheal tube.

Critical Assessment in Routine Clinical Practice of Liquid Biopsy for EGFR Status Testing in Non-Small-Cell Lung Cancer: A Single-Laboratory Experience (LPCE, Nice, France)

BACKGROUND

The introduction of liquid biopsy using PCR-based assays into routine practice has had a strong impact on the treatment of EGFR-mutated lung adenocarcinoma and is now commonly used for routine testing of EGFR mutations in certain clinical settings. To assess whether the claimed benefits of PCR-based assays hold true in daily practice at a multicenter clinical institution, we assessed how treatment decisions are affected by PCR-based assays for the analysis of EGFR mutations from plasma samples in a centralized laboratory (LPCE, Nice, France).

PATIENTS AND METHODS

A total of 345 samples were analyzed using the US Food and Drug Administration-approved Cobas EGFR Mutation Test v2 and 103 using the Therascreen EGFR Plasma RGQ PCR Kit over 3 years (395 samples from 324 patients). Eleven plasma samples were validated independently using Cobas at 3 institutions, and 130 samples were analyzed using Stilla digital PCR. Clinical data were collected for 175 (54%) of 324 patients.

RESULTS

Cobas was superior to the Therascreen assay and demonstrated 100% reproducibility. Digital PCR showed only 48%, 83%, and 58% concordance with Cobas for exon 19 deletions, L858R mutations, and T790M mutations, respectively. Liquid biopsies helped inform and change treatment when resistance occurred and enabled the detection of EGFR mutations in patients when biopsy tissue results were unavailable.

CONCLUSION

PCR-based assays are a fast and convenient test, allowing the detection of primary and secondary EGFR mutations from plasma. Cobas proved to be a reliable test, whereas digital PCR produced too many inconclusive results to be currently recommended as a principal testing device.

A Concentric Tube Robot System for Rigid Bronchoscopy: A Feasibility Study on Central Airway Obstruction Removal

New robotic systems have recently emerged to assist with peripheral lung access, but a robotic system for rigid bronchoscopy has yet to be developed. We describe a new robotic system that can deliver thin robotic manipulators through the ports of standard rigid bronchoscopes. The manipulators bend and elongate to provide maneuverability of surgical tools at the endoscope tip, without endoscope motion. We describe an initial feasibility study on the use of this system to bronchoscopically treat a central airway obstruction (CAO). CAO is prevalent and can be life-threatening in patients with large tumors, and conventional rigid bronchoscopic treatments place patients at risk of complications including broken teeth, neck trauma and damage to oropharyngeal structures due to significant forces induced by bronchoscope tilting and manipulation. In this study, we used an ex vivo ovine airway model to demonstrate the ability of a physician using the robotic system to efficiently remove tissue and restore the airway. Pre- and post-operative CT scans showed that the robot was able to reduce the degree of airway obstruction stenosis from 75 to 14% on average for five CAO resections performed in an ex vivo animal model. Using cadaver experiments, we demonstrated the potential of the robotic system to substantially reduce the intraoperative forces applied to the patient's head and neck (from 80.6 to 4.1 N). These preliminary results illustrate that CAO removal is feasible with our new rigid bronchoscopy robot system, and that this approach has the potential to reduce forces applied to the patient due to bronchoscope angulation, and thereby reduce the risk of complications encountered during CAO surgery.

Diagnostic value of bronchoalveolar lavage in the subset of patients with negative sputum/smear and mycobacterial culture and a suspicion of pulmonary tuberculosis

BACKGROUND

The diagnostic value of bronchoalveolar lavage in patients with negative sputum/smear for tuberculous bacilli has been well studied. However, its value in the subset of patients with both negative sputum/smear and culture is seldom reported.

METHODS

A retrospective study of patients referred for diagnostic bronchoscopy for the suspicion of pulmonary tuberculosis during the period from April 1st, 2015 to March 30th, 2016, and who had negative sputum/smear and culture for tuberculous bacilli.

RESULTS

One hundred and ninety patients fulfilled the inclusion criteria. Bronchoalveolar lavage detected further 61/190 (32.1%) pulmonary tuberculosis cases. Bronchoalveolar lavage mycobacterial culture and polymerase chain reaction (positive in 60/190 (31.6%) and 58/190 (30.5%) of patients respectively) provided the highest diagnostic yield, whereas direct smear provided the lowest yield. Bronchoalveolar lavage had a sensitivity of 89.7%, a specificity of 100%, a positive predictive value of 100%, a negative predictive value of 94.6%, and a test accuracy of 96.3% in suspected pulmonary tuberculosis cases with negative sputum/smear and culture. Positive bronchoalveolar lavage yield for tuberculosis was significantly associated with a positive QuantiFERON-TB Gold In-Tube test, positive purified protein derivative skin test, radiological evidence of upper zone abnormality and patient's origin being from the Indian subcontinent.

CONCLUSION

Bronchoalveolar lavage should be pursued as a useful diagnostic tool for suspected pulmonary tuberculosis cases when sputum/smear and culture are negative. Its value is higher in the subset of patients with positive QuantiFERON-TB Gold In-Tube test, positive purified protein derivative skin test, upper zone abnormality on radiograph or being from the Indian subcontinent.