Comparison of Early and Late Intubation in COVID-19 and Its Effect on Mortality.

BACKGROUND: Best practices for management of COVID-19 patients with acute respiratory failure continue to evolve. Initial debate existed over whether patients should be intubated in the emergency department or trialed on noninvasive methods prior to intubation outside the emergency department. OBJECTIVES: To determine whether emergency department intubations in COVID-19 affect mortality. METHODS: We conducted a retrospective observational chart review of patients who had a confirmed positive COVID-19 test and required endotracheal intubation during their hospital course between 1 March 2020 and 1 June 2020. Patients were divided into two groups based on location of intubation: early intubation in the emergency department or late intubation performed outside the emergency department. Clinical and demographic information was collected including comorbid medical conditions, qSOFA score, and patient mortality. RESULTS: Of the 131 COVID-19-positive patients requiring intubation, 30 (22.9%) patients were intubated in the emergency department. No statistically significant difference existed in age, gender, ethnicity, or smoking status between the two groups at baseline. Patients in the early intubation cohort had a greater number of existing comorbidities (2.5, p = 0.06) and a higher median qSOFA score (3, p ≤ 0.001). Patients managed with early intubation had a statistically significant higher mortality rate (19/30, 63.3%) compared to the late intubation group (42/101, 41.6%). CONCLUSION: COVID-19 patients intubated in the emergency department had a higher qSOFA score and a greater number of pre-existing comorbidities. All-cause mortality in COVID-19 was greater in patients intubated in the emergency department compared to patients intubated outside the emergency department.

Diltiazem Does Not Prevent Postoperative Atrial Fibrillation After Thoracoscopic Lobectomy.

OBJECTIVE: Thoracoscopic lobectomy is associated with lower rates of adverse events compared to thoracotomy. Despite this, postoperative atrial fibrillation (POAF) occurs in at least 10% of patients. Our objective is to determine if prophylaxis with diltiazem significantly reduced POAF events. METHODS: Patients without prior history of atrial fibrillation who underwent thoracoscopic lobectomy from 2007 to 2016 at one institution were analyzed in a retrospective cohort study utilizing a prospective database. Patients treated from 2007 to 2012 received no prophylaxis. Patients treated after 2012 received diltiazem postoperatively. All patients were monitored with continuous telemetry postoperatively. Multivariate direct logistic regression was performed to determine independent predictors of POAF. We report adjusted odds ratios and accompanying 95% confidence intervals, with P < 0.05 denoting statistical significance. RESULTS: The final regression model included 416 patients (52 with POAF, 364 without). In univariate analysis, the variables of body mass index and history of congestive heart failure, diabetes, or hypertension, and prophylaxis status did not meet inclusion criteria. Age, gender, history of stroke or transient ischemic attack, and vascular disease were included. Only ages 65 to 74 (P = 0.03) and ≥75 (P = 0.02), compared to <65, were statistically significant predictors of POAF. Adjusted odds ratios of ages 65 to 74 and ≥75 were 2.88 and 2.62, respectively. CONCLUSIONS: Diltiazem prophylaxis did not significantly reduce POAF incidence following thoracoscopic lobectomy. Further study is warranted since POAF remains an unwanted source of morbidity and cost for lobectomy patients.

Preoperative CHA2DS2-VASc Score Predicts Postoperative Atrial Fibrillation after Lobectomy.

BACKGROUND: Postoperative atrial fibrillation (POAF) affects 10 to 20% of noncardiac thoracic surgeries and increases patient morbidity and costs. The purpose of this study is to determine if preoperative CHA2DS2-VASc score can predict POAF after pulmonary lobectomy for nonsmall cell lung cancer. METHODS: Patients with complete CHA2DS2-VASc data who underwent lobectomies from January 2007 to January 2016 at a single institution were analyzed in a retrospective case-control study using a prospective database. An independent samples t-test was used to compare the mean CHA2DS2-VASc scores of POAF and non-POAF groups. A multivariable logistic regression analysis (MVA) evaluated the independent contribution of variables of the CHA2DS2-VASc score in predicting POAF. Chi-square test with univariate odds ratios (ORs) was used to determine a statistically significant cutoff score for predicting POAF. RESULTS: Of 525 total patients, 82 (15.6%) developed POAF (mean CHA2DS2-VASc score: 2.7) and 443 (84.4%) did not develop POAF (mean score: 2.3). Mean difference between these groups was significant at 0.43 (p = 0.01; 95% confidence interval [CI]: 0.09-0.76). In the MVA, significant predictors of POAF were age 65 to 74 years (adjusted OR [aOR] = 2.45; 95% CI: 1.31-4.70; p = 0.006) and age ≥75 years (aOR = 3.11; 95% CI: 1.62-5.95; p = 0.0006). Patients with CHA2DS2-VASc scores ≥5 had significantly increased OR for POAF (OR = 2.59; 95% CI: 1.22-5.50). CONCLUSIONS: Preoperatively calculated CHA2DS2-VASc score can predict POAF in patients undergoing pulmonary lobectomy. Age is the most statistically significant independent predictor, and patients with scores ≥5 have significantly increased risk. Trials for POAF prophylaxis should target this population.

Acellular Dermal Matrix Versus Inferior Deepithelialized Flap Breast Reconstruction: Equivalent Outcomes, with Increased Cost.

BACKGROUND: Approximately 250,000 new cases of breast cancer are diagnosed yearly in the U.S. resulting in more postmastectomy breast reconstructions (PMBRs). The acellular dermal matrix (ADM) expander-implant method became popular in the mid-2000s, but newer techniques such as the inferior deepithelialized flap (IDF) has more recently been described. We hypothesize that ADMs and IDFs provide comparable aesthetic outcomes, with no difference in complication rates and operative characteristics. METHODS: A retrospective, single-institution study was performed between July 1, 2012, and June 30, 2014, examining all PMBR's (ADM and IDF). Outcomes were categorized as clinical (e.g., complications requiring surgical intervention) or aesthetic. RESULTS: A total of 65 patients (41 ADM; 24 IDF; mean age, 53.4 ± 10.7 years) were included, with 101 PMBR's evaluated (63 ADM and 38 IDF). Patients who underwent IDFs had higher body mass index (32 versus 25; P < 0.01) and higher grades of breast ptosis. Major complication rates were similar between ADM and IDF groups (22% versus 31.5%; P = 0.34). There were no differences in aesthetic outcomes between groups (rater intraclass correlation, 0.92). The average IDF breast reconstruction took nearly 30 minutes longer per reconstructed side (192 minutes versus 166 minutes; P = 0.02), but operative costs were more expensive for the ADM breast reconstruction. CONCLUSIONS: The IDF procedure took 30 minutes longer for each reconstructed side, without significant differences in complications or aesthetic outcomes between the 2 PMBRs. IDF reconstructions may be more suitable for patients with grade 3 breast ptosis and higher body mass index. Further studies should focus on long-term outcomes and value-based approaches to PMBR.

Dynamic behavior of venous collapsibility and central venous pressure during standardized crystalloid bolus: A prospective, observational, pilot study.

INTRODUCTION: Measurement of intravascular volume status is an ongoing challenge for physicians in the surgical intensive care unit (SICU). Most surrogates for volume status, including central venous pressure (CVP) and pulmonary artery wedge pressure, require invasive lines associated with a number of potential complications. Sonographic assessment of the collapsibility of the inferior vena cava (IVC) has been described as a noninvasive method for determining volume status. The purpose of this study was to analyze the dynamic response in IVC collapsibility index (IVC-CI) to changes in CVP in SICU patients receiving fluid boluses for volume resuscitation. MATERIALS AND METHODS: A prospective pilot study was conducted on a sample of SICU patients who met clinical indications for intravenous (IV) fluid bolus and who had preexisting central venous access. Boluses were standardized to crystalloid administration of either 500 mL over 30 min or 1,000 mL over 60 min, as clinically indicated. Concurrent measurements of venous CI (VCI) and CVP were conducted right before initiation of IV bolus (i.e. time 0) and then at 30 and 60 min (as applicable) after bolus initiation. Patient demographics, ventilatory parameters, and vital sign assessments were recorded, with descriptive outcomes reported due to the limited sample size. RESULTS: Twenty patients received a total of 24 IV fluid boluses. There were five recorded 500 mL boluses given over 30 min and 19 recorded 1,000 mL boluses given over 60 min. Mean (median) CVP measured at 0, 30, and 60 minutes post-bolus were 6.04 ± 3.32 (6.5), 9.00 ± 3.41 (8.0), and 11.1 ± 3.91 (12.0) mmHg, respectively. Mean (median) IVC-CI values at 0, 30, and 60 min were 44.4 ± 25.2 (36.5), 26.5 ± 22.8 (15.6), and 25.2 ± 21.2 (14.8), respectively. CONCLUSIONS: Observable changes in both VCI and CVP are apparent during an infusion of a standardized fluid bolus. Dynamic changes in VCI as a measurement of responsiveness to fluid bolus are inversely related to changes seen in CVP. Moreover, an IV bolus tends to produce an early response in VCI, while the CVP response is more gradual. Given the noninvasive nature of the measurement technique, VCI shows promise as a method of dynamically measuring patient response to fluid resuscitation. Further studies with larger sample sizes are warranted.

Comorbidity-Polypharmacy Score as Predictor of Outcomes in Older Trauma Patients: A Retrospective Validation Study.

INTRODUCTION: Traditional injury severity assessment is insufficient in estimating the morbidity and mortality risk for older (≥45 years) trauma patients. Commonly used tools involve complex calculations or tables, do not consider all comorbidities, and often rely on data that are not available early in the trauma patient's hospitalization. The comorbidity-polypharmacy score (CPS), a sum of all pre-injury medications and comorbidities, was found in previous studies to independently predict morbidity and mortality in this older patient population. However, these studies are limited by relatively small sample sizes. Consequently, we sought to validate previous research findings in a large, administrative dataset. METHODS: A retrospective study of patients ages≥45 years was performed using an administrative trauma database from St. Luke's University Hospital's Level I Trauma Center. The study period was from 1 January 2008 to 31 December 2013. Abstracted data included patient demographics, injury mechanism and severity [injury characteristics and severity score (ISS)], Glasgow coma scale (GCS), hospital and intensive care unit lengths of stay (HLOS and ILOS, respectively), morbidity, post-discharge destination, and in-hospital mortality. Univariate analyses were conducted with mortality, all-cause morbidity, and discharge destination as primary end-points. Variables reaching statistical significance (p≤0.20) were included in a multivariate logistic regression model. Data are presented as adjusted odds ratios (AORs), with p<0.05 denoting statistical significance. RESULTS: A total of 5863 patient records were analyzed. Average patient age was 68.5±15.3 years (52% male, 89% blunt mechanism, mean GCS 14.3). Mean HLOS and ILOS increased significantly with increasing CPS (p<0.01). Independent predictors of mortality included age (AOR 1.05, p<0.01), CPS (per-unit AOR 1.08, p<0.02), GCS (AOR 1.43 per-unit decrease, p<0.01), and ISS (per-unit 1.08, p<0.01). Independent predictors of all-cause morbidity included age (AOR 1.02, p<0.01), GCS (AOR per-unit decrease 1.08, p<0.01), ISS (per-unit AOR 1.09, p<0.01), and CPS (per-unit AOR 1.04, p<0.01). CPS did not independently predict need for discharge to a facility. CONCLUSIONS: This study confirms that CPS is an independent predictor of all-cause morbidity and mortality in older trauma patients. However, CPS was not independently associated with need for discharge to a facility. Prospective multicenter studies are needed to evaluate the use of CPS as a predictive and interventional tool, with special focus on correlations between specific pre-existing conditions, pharmacologic interactions, and morbidity/mortality patterns.

Academic College of Emergency Experts in India's INDO-US Joint Working Group and OPUS12 Foundation Consensus Statement on Creating A Coordinated, Multi-Disciplinary, Patient-Centered, Global Point-of-Care Biomarker Discovery Network.

Biomarker science brings great promise to clinical medicine. This is especially true in the era of technology miniaturization, rapid dissemination of knowledge, and point-of-care (POC) implementation of novel diagnostics. Despite this tremendous progress, the journey from a candidate biomarker to a scientifically validated biomarker continues to be an arduous one. In addition to substantial financial resources, biomarker research requires considerable expertise and a multidisciplinary approach. Investigational designs must also be taken into account, with the randomized controlled trial remaining the "gold standard". The authors present a condensed overview of biomarker science and associated investigational methods, followed by specific examples from clinical areas where biomarker development and/or implementation resulted in tangible enhancements in patient care. This manuscript also serves as a call to arms for the establishment of a truly global, well-coordinated infrastructure dedicated to biomarker research and development, with focus on delivery of the latest discoveries directly to the patient via point-of-care technology.

Volitional pursed lips breathing in patients with stable chronic obstructive pulmonary disease improves exercise capacity.

Pursed lips breathing (PLB) is used by a proportion of patients with chronic obstructive pulmonary disease (COPD) to alleviate dyspnea. It is also commonly used in pulmonary rehabilitation. Data to support its use in patients who do not spontaneously adopt PLB are limited. We performed this study to assess the acute effects of PLB on exercise capacity in nonspontaneously PLB patients with stable COPD. We performed a randomized crossover study comparing 6-min walk test (6MWT) at baseline without PLB with 6WMT using volitional PLB. Spirometry, maximal inspiratory and expiratory mouth pressures, and diaphragmatic excursion during tidal and vital capacity breathing using B-mode ultrasonography were measured at baseline and after 10 min of PLB. A Visual Analog Scale (VAS) assessed subjective breathlessness at rest, after 6MWT and after 6MWT with PLB. p ≤ 0.01 was considered significant. Mean ± SD age of patients was 53.1 ± 7.4 years. Forced expiratory volume in 1 second was 1.1 ± 0.4 L/min (38.4 ± 13.2% predicted). Compared with spontaneous breathing, all but one patient with PLB showed a significant increment in 6MW distance (+34.9 ± 26.4 m; p = 0.002). There was a significant reduction in respiratory rate post 6MWT with PLB compared with spontaneous breathing (-4.4 ± 2.8 per minute; p = 0.003). There was no difference in VAS scores. There was a significant correlation between improvement in 6MWT distance and increase in diaphragmatic excursion during forced breathing. The improvement was greater in patients who had poorer baseline exercise performance. PLB has an acute benefit on exercise capacity. Sustained PLB or short bursts of PLB may improve exercise capacity in stable COPD.

Logistic regression: a brief primer.

Regression techniques are versatile in their application to medical research because they can measure associations, predict outcomes, and control for confounding variable effects. As one such technique, logistic regression is an efficient and powerful way to analyze the effect of a group of independent variables on a binary outcome by quantifying each independent variable's unique contribution. Using components of linear regression reflected in the logit scale, logistic regression iteratively identifies the strongest linear combination of variables with the greatest probability of detecting the observed outcome. Important considerations when conducting logistic regression include selecting independent variables, ensuring that relevant assumptions are met, and choosing an appropriate model building strategy. For independent variable selection, one should be guided by such factors as accepted theory, previous empirical investigations, clinical considerations, and univariate statistical analyses, with acknowledgement of potential confounding variables that should be accounted for. Basic assumptions that must be met for logistic regression include independence of errors, linearity in the logit for continuous variables, absence of multicollinearity, and lack of strongly influential outliers. Additionally, there should be an adequate number of events per independent variable to avoid an overfit model, with commonly recommended minimum "rules of thumb" ranging from 10 to 20 events per covariate. Regarding model building strategies, the three general types are direct/standard, sequential/hierarchical, and stepwise/statistical, with each having a different emphasis and purpose. Before reaching definitive conclusions from the results of any of these methods, one should formally quantify the model's internal validity (i.e., replicability within the same data set) and external validity (i.e., generalizability beyond the current sample). The resulting logistic regression model's overall fit to the sample data is assessed using various goodness-of-fit measures, with better fit characterized by a smaller difference between observed and model-predicted values. Use of diagnostic statistics is also recommended to further assess the adequacy of the model. Finally, results for independent variables are typically reported as odds ratios (ORs) with 95% confidence intervals (CIs).

Knowledge, attitudes, and practice behaviors of oncology advanced practice nurses regarding advanced care planning for patients with cancer.

PURPOSE/OBJECTIVES: To establish initial reliability and validity of a Web-based survey focused on oncology advanced practice nurses' (APNs') knowledge, attitudes, and practice behaviors regarding advanced care planning, and to obtain preliminary understanding of APNs' knowledge, attitudes, and practice behaviors and perceived barriers to advanced care planning. DESIGN: Descriptive, cross-sectional, pilot survey study. SETTING: The eastern United States. SAMPLE: 300 oncology APNs. METHODS: Guided by the Theory of Planned Behavior, a knowledge, attitudes, and practice behaviors survey was developed and reviewed for content validity. The survey was distributed to 300 APNs via e-mail and sent again to the 89 APNs who responded to the initial survey. Exploratory factor analysis was used to examine the construct validity and test-retest reliability of the survey's attitudinal and practice behavior portions. MAIN RESEARCH VARIABLES: Respondents' demographics, knowledge, attitudes, practice behaviors, and perceived barriers to advanced care planning practice. FINDINGS: Exploratory factor analysis yielded a five-factor solution from the survey's attitudes and practice behavior portions with internal consistency using Cronbach alpha. Respondents achieved an average of 67% correct answers in the 12-item knowledge section and scored positively in attitudes toward advanced care planning. Their practice behavior scores were marginally positive. The most common reported barriers were from patients' and families' as well as physicians' reluctance to discuss advanced care planning. CONCLUSIONS: The attitudinal and practice behaviors portions of the survey demonstrated preliminary construct validity and test-retest reliability. Regarding advanced care planning, respondents were moderately knowledgeable, but their advanced care planning practice was not routine. IMPLICATIONS FOR NURSING: Validly assessing oncology APNs' knowledge, attitudes, and practice behaviors regarding advanced care planning will enable more tailored approaches to improve end-of-life care outcomes.

Serum magnesium is an independent predictor of frequent readmissions due to acute exacerbation of chronic obstructive pulmonary disease.

INTRODUCTION: Predictors of readmission for acute exacerbations of chronic obstructive pulmonary disease (AECOPD) are not well defined. Identifying modifiable predictors may help reduce the burden of readmissions. This study was done to evaluate the role of serum magnesium in frequent readmissions. METHODS: One hundred patients admitted with a diagnosis of AECOPD to a tertiary care center from April 2004 to March 2006 were retrospectively followed from the time of index admission until the next admission or death. Number of admissions was calculated for the year after index admission, and frequent readmission was defined as > or =3 per year. Patients with other respiratory diseases, renal failure, and congestive heart failure were excluded. Serum magnesium was assayed at the time of admission by the colorimetric method. Logistic regression analysis was used to find independent risk factors for readmission. RESULTS: The mean age of patients was 71.9 (+/-10.9 standard deviation (SD)) years. Fifty-seven were females. Ninety percent were current or ex-smokers. The median duration of time to next admission was 108 days (range 2-842). A total of 87 patients were readmitted at least once during the first year of follow-up, while 5% died; 23% had frequent readmissions; 85% had received pneumococcal vaccine within 5 years; and 29% received influenza vaccine in the current season. Frequency of readmissions was not influenced by the administration of inhaled or oral steroids, and diuretics at the time of discharge. Vaccination did not protect against frequent readmissions. The sole predictor of frequent readmissions was serum magnesium level (1.77+/-0.19 vs. 1.86+/-0.24mEq/L; adjusted odds ratio 0.003, 95% Confidence intervals <0.001-0.55; p=0.03). CONCLUSIONS: Lower serum magnesium level independently predicts readmission for AECOPD. This is an easily modifiable risk factor.