Innate and adaptive immune responses in subjects with CPA secondary to post-pulmonary tuberculosis lung abnormalities.

BACKGROUND: Post-tuberculosis lung abnormality (PTLA) is the most common risk factor for chronic pulmonary aspergillosis (CPA), and 14%-25% of the subjects with PTLA develop CPA. The pathogenesis and the host immune response in subjects with PTLA who develop CPA need to be better understood. METHODS: We prospectively compared the innate and adaptive immune responses mounted by patients of PTLA with or without CPA (controls). We studied the neutrophil oxidative burst (by dihydrorhodamine 123 test), classic (serum C3 and C4 levels) and alternative (mannose-binding lectin [MBL] protein levels) complement pathway, serum immunoglobulins (IgG, IgM and IgA), B and T lymphocytes and their subsets in subjects with PTLA with or without CPA. RESULTS: We included 111 subjects (58 CPA and 53 controls) in the current study. The mean ± SD age of the study population was 42.6 ± 15.7 years. The cases and controls were matched for age, gender distribution and body weight. Subjects with CPA had impaired neutrophil oxidative burst, lower memory T lymphocytes and impaired Th-1 immune response (lower Th-1 lymphocytes) than controls. We found no significant difference between the two groups in the serum complement levels, MBL levels, B-cell subsets and other T lymphocyte subsets. CONCLUSION: Subjects with CPA secondary to PTLA have impaired neutrophil oxidative burst and a lower Th-1 response than controls.

Bronchial Valves for Persistent Air Leak: A Systematic Review and Meta-analysis.

BACKGROUND: Patients with persistent air leak (PAL) pose a therapeutic challenge to physicians, with prolonged hospital stays and high morbidity. There is little evidence on the efficacy and safety of bronchial valves (BV) for PAL. METHODS: We systematically searched the PubMed and Embase databases to identify studies evaluating the efficacy and safety of BV for PAL. We calculated the success rate (complete resolution of air leak or removal of intercostal chest drain after bronchial valve placement and requiring no further procedures) of BV for PAL in individual studies. We pooled the data using a random-effects model and examined the factors influencing the success rate using multivariable meta-regression. RESULTS: We analyzed 28 observational studies (2472 participants). The pooled success rate of bronchial valves in PAL was 82% (95% confidence intervals, 75 to 88; 95% prediction intervals, 64 to 92). We found a higher success rate in studies using intrabronchial valves versus endobronchial valves (84% vs. 72%) and in studies with more than 50 subjects (93% vs. 77%). However, none of the factors influenced the success rate of multivariable meta-regression. The overall complication rate was 9.1% (48/527). Granulation tissue was the most common complication reported followed by valve migration or expectoration and hypoxemia. CONCLUSION: Bronchial valves are an effective and safe option for treating PAL. However, the analysis is limited by the availability of only observational data.

Diagnostic Yield and Safety of the 19-Gauge versus 22-Gauge Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration Needle in Subjects with Sarcoidosis (GUESS).

INTRODUCTION: Observational data suggest that the 19-gauge (G) needle for endobronchial ultrasound (EBUS)-guided transbronchial needle aspiration (TBNA) offers a higher diagnostic yield than the 22-G needle in sarcoidosis. No randomized trial has compared the yield of the two needles. METHODS: We randomized consecutive subjects with suspected sarcoidosis and enlarged thoracic lymph nodes to undergo EBUS-TBNA with either the 19-G or the 22-G needle. We compared the study groups for diagnostic sensitivity (primary outcome) assessed by the yield of granulomas in subjects finally diagnosed with sarcoidosis. We also compared the sample adequacy, difficulty performing the needle puncture assessed on a visual analog scale (VAS), the subject's cough intensity on an operator-rated VAS, and procedure-related complications (secondary outcomes). RESULTS: We randomized 150 (mean age, 43.0 years; 55% women) subjects and diagnosed sarcoidosis in 116 subjects. The diagnostic sensitivity of the 19-G needle (45/60, 75.0%) was not higher (p = 0.52) than the 22-G needle (39/56, 69.6%). We obtained adequate aspirates in 90.0% and 85.7% of subjects in the respective groups (p = 0.48). The operators had greater difficulty puncturing lymph nodes with the 19-G needle (p = 0.03), while the operator-assessed cough intensity was similar in the groups (p = 0.41). Transient hypoxemia was the only complication encountered during EBUS-TBNA (two subjects in either group). CONCLUSION: We did not find the 19-G needle superior to the 22-G in diagnostic sensitivity, specimen adequacy, or safety of EBUS-TBNA in sarcoidosis. Puncturing the lymph nodes was more difficult with the 19-G needle.

Revised ISHAM-ABPA working group clinical practice guidelines for diagnosing, classifying and treating allergic bronchopulmonary aspergillosis/mycoses.

BACKGROUND: The International Society for Human and Animal Mycology (ISHAM) working group proposed recommendations for managing allergic bronchopulmonary aspergillosis (ABPA) a decade ago. There is a need to update these recommendations due to advances in diagnostics and therapeutics. METHODS: An international expert group was convened to develop guidelines for managing ABPA (caused by Aspergillus spp.) and allergic bronchopulmonary mycosis (ABPM; caused by fungi other than Aspergillus spp.) in adults and children using a modified Delphi method (two online rounds and one in-person meeting). We defined consensus as ≥70% agreement or disagreement. The terms "recommend" and "suggest" are used when the consensus was ≥70% and <70%, respectively. RESULTS: We recommend screening for A. fumigatus sensitisation using fungus-specific IgE in all newly diagnosed asthmatic adults at tertiary care but only difficult-to-treat asthmatic children. We recommend diagnosing ABPA in those with predisposing conditions or compatible clinico-radiological presentation, with a mandatory demonstration of fungal sensitisation and serum total IgE ≥500 IU·mL-1 and two of the following: fungal-specific IgG, peripheral blood eosinophilia or suggestive imaging. ABPM is considered in those with an ABPA-like presentation but normal A. fumigatus-IgE. Additionally, diagnosing ABPM requires repeated growth of the causative fungus from sputum. We do not routinely recommend treating asymptomatic ABPA patients. We recommend oral prednisolone or itraconazole monotherapy for treating acute ABPA (newly diagnosed or exacerbation), with prednisolone and itraconazole combination only for treating recurrent ABPA exacerbations. We have devised an objective multidimensional criterion to assess treatment response. CONCLUSION: We have framed consensus guidelines for diagnosing, classifying and treating ABPA/M for patient care and research.

Sensitivity and specificity of LDBio Aspergillus ICT lateral flow assay for diagnosing allergic bronchopulmonary aspergillosis in adult asthmatics.

BACKGROUND: Aspergillus fumigatus-specific IgG estimation is crucial for diagnosing allergic bronchopulmonary aspergillosis (ABPA). A point-of-care LDBio immunochromatographic lateral flow assay (LFA) had 0%-90% sensitivity to detect IgG/IgM antibodies against A. fumigatus. OBJECTIVE: To assess the accuracy of LDBio-LFA in diagnosing ABPA, using the modified ISHAM-ABPA working group criteria as the reference standard. The secondary objective was to compare the diagnostic performance between LDBio-LFA and A. fumigatus-specific IgG (cut-offs, 27 and 40 mgA/L), using a multidisciplinary team (blinded to A. fumigatus-IgG and LDBio-LFA results) diagnosis of ABPA as the reference standard. METHODS: We prospectively enrolled adult subjects with asthma and ABPA. We performed the LDBio-LFA per the manufacturer's recommendations. We used the commercially available automated fluorescent enzyme immunoassay for measuring serum A. fumigatus-specific IgG. We used the same serum sample to perform both index tests. The tests were performed by technicians blinded to the results of other tests and clinical diagnoses. RESULTS: We included 123 asthmatic and 166 ABPA subjects, with a mean ± SD age of 37.4 ± 14.4 years. Bronchiectasis and high-attenuation mucus were seen in 93.6% (146/156) and 24.3% (38/156) of the ABPA subjects. The sensitivity and specificity of LDBio-LFA in diagnosing ABPA were 84.9% and 82.9%, respectively. The sensitivity of serum A. fumigatus-specific IgG ≥27 mgA/L was 13% better than LDBio-LFA, with no difference in specificity. There was no significant difference in sensitivity and specificity between LDBio-LFA and serum A. fumigatus-IgG ≥40 mgA/L. CONCLUSION: LDBio-LFA is a valuable test for diagnosing ABPA. However, a negative test should be confirmed using an enzyme immunoassay.

Incidence and prevalence of chronic pulmonary aspergillosis in patients with post-tuberculosis lung abnormality: Results from a community survey in North India.

BACKGROUND: Post-tuberculosis lung abnormality (PTLA) is the most common risk factor for developing chronic pulmonary aspergillosis (CPA). However, the prevalence and incidence of CPA in PTLA patients in India remain unknown. OBJECTIVES: We aimed to ascertain the incidence and prevalence of CPA in subjects with PTLA. METHODS: We identified a cohort of pulmonary tuberculosis who completed anti-tuberculosis therapy (ATT) before November 2019 from the records of the 12 tuberculosis treatment centers attached to the national program. We recorded the clinical and demographic details. We performed computed tomography (CT) of the chest and estimated serum A. fumigatus-specific IgG. We categorised subjects as PTLA with or without CPA using a composite of clinical, radiological, and microbiological features. We resurveyed the subjects at 6 months (or earlier) for the presence of new symptoms. We calculated the prevalence and the incidence rate (per 100-person years) of CPA. RESULTS: We included 117 subjects with PTLA, with a median of 3 years after ATT completion. Eleven subjects had CPA in the initial survey, and one additional case developed CPA during the second survey. The prevalence of CPA in PTLA subjects was 10.3% (12/117). The total observation period was 286.7 person-years. The median (interquartile range) time to develop CPA after ATT completion was 12.5 (5-36.7) months. We found the CPA incidence rate (95% confidence interval) of 4.2 (1.8-6.5) per 100-person years. CONCLUSION: Chronic pulmonary aspergillosis complicates 10% of PTLA subjects after successful outcomes with ATT. Four new CPA cases may develop per 100-persons years of observation after ATT completion. We suggest screening patients with PTLA who develop new symptoms for CPA.

Prevalence of asymptomatic brain metastases in metastatic nonsquamous nonsmall cell lung cancer: Treatment implications for resource-constrained settings.

BACKGROUND: Brain metastases (BM) are common in metastatic nonsmall cell lung cancer (NSCLC). However, routine neuroimaging in asymptomatic patients with metastatic NSCLC is controversial as there is no conclusive evidence of benefit from the detection and treatment of asymptomatic BM. Herein, we evaluated the prevalence of asymptomatic BM and its treatment implications in a resource-limited setting. METHODS: Consecutive patients with newly diagnosed, treatment-naïve, metastatic, nonsquamous NSCLC (NS-NSCLC) were included. Subjects who already had clinical or radiological features suggestive of BM were excluded from the study. All eligible subjects underwent contrast-enhanced magnetic resonance imaging (MRI) of the brain. Management of the detected BM was at the discretion of the treating clinicians. RESULTS: Among 809 subjects who were screened, 100 (12.4%) were included in the study and underwent MRI. BM was present in 30 (30%) of the subjects and absent in the remaining 70 subjects. A majority of BM were multiple (70%), involved the frontal lobe commonly (73.3%), and had a mean (standard deviation) size of 13.2 (7.3) mm. Detection of BM resulted in a treatment alteration in 17 (17%) of the study subjects (brain irradiation, n = 17, change in targeted therapy, n = 3) with BM. There was no difference in survival of patients who underwent treatment alteration for management of BM compared to those who did not (P = 0.132). CONCLUSIONS: About one-third of patients with metastatic NS-NSCLC had BM in MRI despite the absence of symptoms. Despite treatment of the majority of the patients with BM with brain irradiation, there was no demonstrable survival benefit. Hence, we conclude that although routine neuroimaging of asymptomatic patients with newly diagnosed metastatic NSCLC may result in treatment alteration (primarily brain irradiation) in a small proportion of patients, it may not influence outcomes in resource-constrained settings.

High-dose (40†mg) versus low-dose (20†mg) prednisolone for treating sarcoidosis: a randomised trial (SARCORT trial).

BACKGROUND: Current guidelines recommend 20-40 mg·day-1 of oral prednisolone for treating pulmonary sarcoidosis. Whether the higher dose (40 mg·day-1) can improve outcomes remains unknown. METHODS: We conducted an investigator-initiated, single-centre, open-label, parallel-group, randomised controlled trial (ClinicalTrials.gov identifier NCT03265405). Consecutive subjects with pulmonary sarcoidosis were randomised (1:1) to receive either high-dose (40 mg·day-1 initial dose) or low-dose (20 mg·day-1 initial dose) oral prednisolone, tapered over 6 months. The primary outcome was the frequency of relapse or treatment failure at 18 months from randomisation. Key secondary outcomes included the time to relapse or treatment failure, overall response, change in forced vital capacity (FVC, in litres) at 6 and 18 months, treatment-related adverse effects and health-related quality of life (HRQoL) scores using the Sarcoidosis Health Questionnaire and Fatigue Assessment Scale. FINDINGS: We included 86 subjects (43 in each group). 42 and 43 subjects completed treatment in the high-dose and low-dose groups, respectively, while 37 (86.0%) and 41 (95.3%), respectively, completed the 18-month follow-up. 20 (46.5%) subjects had relapse or treatment failure in the high-dose group and 19 (44.2%) in the low-dose group (p=0.75). The mean time to relapse/treatment failure was similar between the groups (high-dose 307 days versus low-dose 269 days, p=0.27). The overall response, the changes in FVC at 6 and 18 months and the incidence of adverse effects were also similar. Changes in HRQoL scores did not differ between the study groups. INTERPRETATION: High-dose prednisolone was not superior to a lower dose in improving outcomes or the HRQoL in sarcoidosis and was associated with similar adverse effects.

Role of C-Reactive Protein and Erythrocyte Sedimentation Rate in the Diagnosis and Monitoring of Treatment Response in Treatment Naïve Subjects with Chronic Pulmonary Aspergillosis.

PURPOSE: The role of C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) for diagnosing chronic pulmonary aspergillosis (CPA) remains unknown. Herein, we investigate the diagnostic performance of serum ESR and CRP in CPA. METHODS: We retrospectively analyzed the data of treatment-naïve subjects with CPA and diseased controls (post-tuberculosis lung disease on CT thorax). We treated CPA subjects with six months of oral itraconazole. Our primary objective was to evaluate the sensitivity and specificity of ESR and CRP in diagnosing CPA. The key secondary objective was to study the change in the inflammatory markers with treatment. RESULTS: We included 434 subjects and 20 diseased controls. The sensitivity and specificity of ESR (n = 434) and CRP (at cut-off value of 10 mg/L, n = 308) in diagnosing CPA were 42.9% and 65%, and 52.3% and 65%, respectively. Both ESR and CRP had erratic trend following treatment. ESR and CRP declined or remained stable in approximately 60% of subjects but increased in approximately 40% of the subjects despite treatment. CONCLUSION: Serum CRP and ESR have limited utility in diagnosing and following subjects with CPA.

Long-term follow-up of allergic bronchopulmonary aspergillosis treated with glucocorticoids: A study of 182 subjects.

BACKGROUND: The long-term outcomes of allergic bronchopulmonary aspergillosis (ABPA) are poorly characterised. METHODS: We retrospectively included treatment-naïve subjects of acute stage ABPA-complicating asthma from three randomised trials. All the subjects received oral prednisolone for 4 months and were monitored every 6 weeks for 6 months and then every 6 months. Our primary objective was to estimate the incidence rate and the frequency of subjects experiencing ABPA exacerbation. The key secondary objectives were to evaluate the factors predicting ABPA exacerbation and the changes in serum total IgE seen during treatment. RESULTS: We included 182 subjects. Eighty-one (44.5%) patients experienced 120 exacerbations during 512 patient-years of follow-up. The incidence rate of ABPA exacerbations was 234/1000 patient-years. Most (73/81, 90.1%) subjects experienced ABPA exacerbation within three years of stopping therapy. On multivariate logistic regression analysis, peripheral blood eosinophil count ≥1000 cells/µL (adjusted odds ratio [aOR] 2.43; 95% confidence interval (CI), 1.26-4.67), the extent of bronchiectasis (aOR 1.10; 95% CI, 1.03-1.18), age (aOR 0.97; 95% CI, 0.94-0.99), and female sex (aOR 2.16; 95% CI, 1.10-4.24) independently predicted ABPA exacerbation after adjusting for serum total IgE and high-attenuation mucus. The best cut-off for serum total IgE after 6 weeks for identifying treatment response and ABPA exacerbations was a 20% decline and a 50% increase, respectively. CONCLUSIONS: ABPA exacerbations were common within 3 years of stopping treatment. Age, female sex, peripheral blood eosinophilia and the extent of bronchiectasis predicted ABPA exacerbations. The optimal serum total IgE cut-off for defining ABPA response and exacerbations is a 20% decline and a 50% increase, respectively.

Mucormycosis in Human Immunodeficiency Virus-Infected Individuals: A Systematic Review of Case Reports.

Mucormycosis in human immunodeficiency virus (HIV) infection is uncommon; notably, many cases have additional predisposing factors. Whether mucormycosis differs in HIV-affected individuals with and without additional risk factors (e.g., neutropenia, diabetes mellitus, and transplantation) remains unclear. In this systematic review, we identified 94 cases of HIV and mucormycosis classifiable into three groups: (1) HIV with additional risk factors (n = 50), (2) intravenous drug users (IVDU, n = 24), and (3) no other risk factor (n = 19) for mucormycosis. The most common presentation in IVDU was renal (41.7%) and cerebral mucormycosis (39.2%), whereas rhino-orbital mucormycosis (ROM, 4.2%) was uncommon. In the other two groups, ROM was the most common presentation. Rhizopus was the most frequently isolated Mucorales; however, in IVDU, Lichtheimia was the most common. The overall mortality was 53% and not significantly different in the three groups. Mucormycosis in HIV-infected individuals is rare without additional risk factors or IVDU.

Efficacy and safety of doxycycline versus iodopovidone for pleurodesis through an intercostal tube in malignant pleural effusions: a randomized trial.

PURPOSE: The search for an inexpensive agent for chemical pleurodesis in malignant pleural effusion (MPE) continues. We aimed to compare the efficacy and safety of iodopovidone versus doxycycline for pleurodesis in MPE. METHODS: We randomized consecutive subjects with recurrent symptomatic MPE (1:1) to undergo pleurodesis with either doxycycline or iodopovidone administered through an intercostal tube. The primary outcome was the success rate of pleurodesis at 30 days. The secondary outcomes were the time to pleurodesis, chest pain (assessed using visual analog scale [VAS]) after pleurodesis, and complications (hypotension, acute respiratory failure, empyema). RESULTS: We randomized 52 and 58 subjects to receive either doxycycline or iodopovidone. The mean (standard deviation [SD]) age of the study population (51% women) was 54.1 (13.6) years. Lung cancer (≥ 60%) was the most common underlying cause of MPE. We observed a similar frequency of success in the doxycycline vs. the iodopovidone group (complete response: 43 (82.7%) vs. 46 (79.3%) subjects; partial response: 7 (13.5%) vs. 10 (17.2%) subjects; p = 0.3). The mean (SD) time to pleurodesis was 1.5 (1.9) days and 1.9 (5.4) days in the doxycycline and iodopovidone groups, respectively. While the VAS for chest pain was significantly higher with iodopovidone (mean [SD] VAS: doxycycline, 31.9 [20.9]; iodopovidone, 41.3 [21.8]; p = 0.017), it did not reach the minimal clinically important difference. The complication rates were similar between the two groups. CONCLUSION: Iodopovidone was not superior to doxycycline for pleurodesis in MPE. TRIAL REGISTRATION NUMBER/DATE: clinicaltrials.gov (NCT02583282) / October 22, 2015.

Risk factors for clinically significant diffuse parenchymal lung abnormalities persisting after severe COVID-19 pneumonia.

Background & objectives: The risk factors for clinically significant diffuse parenchymal lung abnormalities (CS-DPLA) persisting after severe coronavirus disease 2019 (COVID-19) pneumonia remain unclear. The present study was conducted to assess whether COVID-19 severity and other parameters are associated with CS-DPLA. Methods: The study participants included patients who recovered after acute severe COVID-19 and presented with CS-DPLA at two or six month follow up and control group (without CS-DPLA). Adults volunteers without any acute illness, chronic respiratory illness and without a history of severe COVID-19 were included as healthy controls for the biomarker study. The CS-DPLA was identified as a multidimensional entity involving clinical, radiological and physiological pulmonary abnormalities. The primary exposure was the neutrophil-lymphocyte ratio (NLR). Recorded confounders included age, sex, peak lactate dehydrogenase (LDH), advanced respiratory support (ARS), length of hospital stay (LOS) and others; associations were analyzed using logistic regression. The baseline serum levels of surfactant protein D, cancer antigen 15-3 and transforming growth factor-ß (TGF-ß) were also compared among cases, controls and healthy volunteers. Results: We identified 91/160 (56.9%) and 42/144 (29.2%) participants with CS-DPLA at two and six months, respectively. Univariate analyses revealed associations of NLR, peak LDH, ARS and LOS with CS-DPLA at two months and of NLR and LOS at six months. The NLR was not independently associated with CS-DPLA at either visit. Only LOS independently predicted CS-DPLA at two months [adjusted odds ratios (aOR) (95% confidence interval [CI]), 1.16 (1.07-1.25); P<0.001] and six months [aOR (95% CI) and 1.07 (1.01-1.12); P=0.01]. Participants with CS-DPLA at six months had higher baseline serum TGF-ß levels than healthy volunteers. Interpretation and conclusions: Longer hospital stay was observed to be the only independent predictor of CS-DPLA six months after severe COVID-19. Serum TGF-ß should be evaluated further as a biomarker.

Characterization of Treatment Response Outcomes in Chronic Pulmonary Aspergillosis: CPAnet Definitions Versus the Existing Criteria.

BACKGROUND: The chronic pulmonary aspergillosis network (CPAnet) has recently proposed definitions for treatment outcomes in CPA. However, these definitions need to be validated. Herein, we evaluate the agreement between the existing and the CPAnet definitions for response assessment. METHODS: We enrolled consecutive treatment-naïve CPA subjects (between January 2021 and June 2021) who received six months of itraconazole therapy and followed them for an additional six months after treatment discontinuation. We retrospectively applied the CPAnet criteria and compared the agreement between the existing and the CPAnet criteria for response assessment (primary objective). We also assessed if adding weight loss (> 5% from baseline) as a component improved the performance of the CPAnet criteria. RESULTS: We included 43 (mean age, 47.4 years) CPA subjects. The existing and the CPAnet criteria categorized 29 (67.4%) and 30 (69.8%) subjects as treatment success, respectively, at treatment completion. There was substantial (kappa = 0.73; p < 0.0001) agreement between the two definitions. However, both criteria did not identify eight subjects requiring treatment re-initiation within three months. There was an increment in the sensitivity of both criteria (by 36%) for identifying treatment failure after incorporating ≥ 5% weight loss as an element of worsening. CONCLUSION: The CPAnet definitions correctly categorized treatment outcomes in most cases of CPA. The addition of weight change would further enhance the performance of the CPAnet treatment outcome definitions.

Role of serum procalcitonin in the diagnosis and monitoring of treatment response in treatment-naïve subjects with chronic pulmonary aspergillosis.

Background: Interferon-gamma (IFN-γ) down-regulates plasma procalcitonin (PCT), marker of inflammation. Chronic pulmonary aspergillosis (CPA) is associated with low IFN-γ levels. Thus, plasma PCT may be elevated in CPA and could have a role in diagnosing and monitoring treatment response in CPA. Herein, we investigate the diagnostic performance of plasma PCT in CPA. Methods: We extracted the demographic, clinical, radiological, treatment outcomes, and plasma PCT levels of CPA subjects and controls (previously treated pulmonary tuberculosis with radiological abnormalities on CT chest [diseased controls] and treatment naïve active pulmonary tuberculosis [PTB]). We treated CPA subjects with six months of oral itraconazole. We took 0.25 ng/mL as a cut-off value for PCT. The study's primary objective was to ascertain the diagnostic performance of PCT in diagnosing CPA. The key secondary outcome was to study the change in the plasma PCT levels after itraconazole therapy. Results: We included 190 CPA cases and 40 controls (diseased controls [n = 20] and active PTB [n = 20]). PCT was elevated (≥0.25 ng/mL) in only 7 (3.7%) subjects with CPA. The sensitivity and specificity of PCT (≥0.25 ng/mL) were 3.7% (1.5-7.4%) and 100 (91.2-100%), respectively. The area under the curve for plasma PCT was 0.48 (95% confidence interval, 0.39-0.58). The plasma PCT values were available in 93 subjects at six months. There was a significant decline in the median plasma levels of PCT after treatment; however, the PCT levels either increased or remained the same in 45% of the subjects. Conclusion: Plasma procalcitonin has poor performance in diagnosing and following subjects with CPA.

Impact of Fingernail Polish on Pulse Oximetry Measurements: A Systematic Review.

BACKGROUND: The effect of application of fingernail polish on SpO2 measurement remains unclear. We conducted this systematic review to ascertain the impact of fingernail polish on SpO2 measurement. METHODS: We queried PubMed, Embase, and CINAHL databases for publications indexed through December 2022. We included studies providing paired SpO2 data from fingertips without and after nail polish application or reporting the number of subjects whose SpO2 could not be measured due to fingernail polish. We used random effects modeling to summarize standardized mean differences (SMDs) and corresponding 95% CI for different nail polish colors from comparative studies. RESULTS: We retrieved 122 studies and included 21 publications, mostly performed on healthy volunteers. Of these, 17 (81.0%) studies had a low risk of bias. We summarized mean SMD for 10 nail polish colors (black, blue, brown, green, orange, pink, purple, red, white, and yellow) from 25 paired data sets on SpO2 across 20 studies. We found small (likely clinically insignificant) but statistically significant differences in mean SpO2 when fingers were coated with black, blue, brown, or purple nail polish (SMD -0.57, -0.47, -0.33, and -0.25, respectively; 95% CI -0.86 to -0.29, -0.84 to -0.10, -0.59 to -0.07, and -0.48 to -0.02, respectively). Only one of 4 studies reported a high proportion of unsuccessful oximeter readings from fingers painted with black (88.0%) or brown (36.0%) nail polish. CONCLUSIONS: Although fingernail polish of some colors can marginally reduce SpO2 reading or occasionally impede SpO2 measurement, the variability is clinically insignificant.

The minimal important difference of St.George's respiratory questionnaire in subjects with chronic pulmonary aspergillosis.

The estimates of the minimal important difference (MID) for the Saint George's respiratory questionnaire (SGRQ) score in CPA remain unknown. We performed a retrospective analysis on treatment-naïve CPA subjects (n = 148) treated with six-month oral itraconazole therapy and completed SGRQ at baseline and six months. The study's objective was to estimate the MID for SGRQ. We used an anchor-based method to determine the MID and found the MID for SGRQ of 7.3.

The estimates of the minimal important difference (MID) for the Saint George's respiratory questionnaire (SGRQ) score in CPA remain unknown. Using an anchor-based method, we found theMID for SGRQ of 7 in CPA.