Home-Based Spirometry Telemonitoring After Allogeneic Hematopoietic Cell Transplantation: Mixed Methods Evaluation of Acceptability and Usability

BACKGROUND

Home-based spirometry (HS) allows for the early detection of lung complications in recipients of an allogeneic hematopoietic cell transplant (AHCT). Although the usability and acceptability of HS are critical for adherence, patient-reported outcomes of HS use remain poorly understood in this setting.

OBJECTIVE

The aim of this study is to design a longitudinal, mixed methods study to understand the usability and acceptability of HS among recipients of AHCT.

METHODS

Study participants performed HS using a Bluetooth-capable spirometer that transmitted spirometry data to the study team in real time. In addition, participants completed usability questionnaires and in-depth interviews and reported their experiences with HS. Analysis of interview data was guided by the constructs of performance expectancy, effort expectancy, and social influence from the Unified Theory of Acceptance and Use of Technology model.

RESULTS

Recipients of AHCT found HS to be highly acceptable despite modest technological barriers. On average, participants believed that the HS was helpful in managing symptoms related to AHCT (scores ranging from 2.22 to 2.68 on a scale of 0-4) and for early detection of health-related problems (score range: 2.88-3.12). Participants viewed HS favorably and were generally supportive of continued use. No significant barriers to implementation were identified from the patient's perspective. Age and gender were not associated with the patient perception of HS.

CONCLUSIONS

Study participants found HS acceptable and easy to use. Some modifiable technical barriers to performing HS were identified; however, wider implementation of pulmonary screening is feasible from the patient's perspective.

Metabolomic Biomarkers to Predict and Diagnose Cystic Fibrosis Pulmonary Exacerbations: A Systematic Review

INTRODUCTION

Metabolomics is an emerging area of research and has the potential to identify clinical biomarkers for predicting or diagnosing cystic fibrosis (CF) pulmonary exacerbations (PEx).

OBJECTIVE

To identify clinically promising metabolites across different sample sources that can be used to predict or diagnose PEx in CF.

EVIDENCE REVIEW

Searches for original literature were completed through EMBASE, MEDLINE, and all databases on the Web of Science with no restrictions on language or publication date. Gray literature was collected through Google Scholar. Additional studies were obtained by contacting authors and searching reference lists of candidate papers. The patient population included individuals with CF. Studies involving patients who underwent lung transplantation were excluded. The outcome was the prediction or diagnosis of pulmonary exacerbations from metabolites directly measured from biological samples. Search results were downloaded and imported into Covidence and duplicates were removed automatically. Any remaining duplicates were manually tagged and excluded. Two independent reviewers screened each abstract for eligibility and repeated this process for full texts. Risk of bias was conducted using QUADAS-2 by two independent reviewers. A third author resolved any remaining conflicts.

RESULTS

A combined 3974 relevant abstracts were identified and 115 full texts were assessed for eligibility. The final 25 studies underwent data extraction for study design, patient demographics, studied metabolites, concentration values, and diagnostic accuracy values. Included studies differed considerably in methodologies, sample specimen types (exhaled breath condensate [EBC], sputum, saliva, plasma, urine), and disease states. We identified 19 unique metabolites that were measured by two or more studies of which 2 have the potential to predict PEx (EBC 4-hydroxycyclohexylcarboxylic acid [4-HCHC] and lactic acid) and 6 to diagnose PEx (EBC 4-HCHC and lactic acid, sputum lactic acid and nitrate, and plasma arginine and methionine).

CONCLUSION AND RELEVANCE

This systematic review has identified promising metabolites for further study in CF. Certain metabolites may provide clinical potential in predicting or diagnosing PEx, but further validation studies are required. With better tools to aid in the earlier identification of PEx, clinicians can implement preventative measures to mitigate airway damage.Systematic Review Registration: https://www.crd.york.ac.uk/prospero/.

Improving primary care access to respirologists using eConsult

BACKGROUND

Patients and primary care providers (PCPs) can experience frustration about poor access to specialist care. The Champlain Building Access to Specialists through eConsultation (BASETM) is a secure online platform that allows PCPs to ask a clinical question to 142 different specialty groups. The specialist is expected to respond within 7 days.

METHODS

This is a retrospective review of the Champlain BASETM respirology eConsults from January 2017 to December 2018. The eConsults were categorized by types of questions asked by the referring provider and by the clinical content of the referral. Specialists' response time and time spent answering the clinical question were analyzed. Referring providers' close-out surveys were reviewed to assess the impact of the respirology eConsult service on traditional referral rates and clinical course of action.

RESULTS

Of the 26 679 cases submitted to the Champlain BASE TM eConsult service, 268 were respirology cases (1%). 91% were sent by family physicians and 9% by nurse practitioners. The median time to respond by specialists was 0.8 days, and the median time billed by specialists was 20 min. The most common topics were pulmonary nodules and masses (16.4%), cough (10.4%), infective problems (8.6%), chronic obstructive pulmonary disease (8.6%) and dyspnea Not Yet Diagnosed (NYD) (7.8%). The most common types of questions asked by PCP were related to investigations warranted (43.1% of cases), general management (17.5%), monitoring (12.6%), need for a respirology referral (12.3%) and drug of choice (6.3%). In 23% of cases, the PCP indicated they were planning to refer the patient for an in-person consultation but no longer needed to after receiving the eConsult advice (avoided referrals). On the other hand, in 13% of cases, the PCP was not going to refer but did after the eConsult (prompted referrals). The eConsult led to a new or additional clinical course of action by the PCP in 49% of cases. In 51% of cases, the PCP suggested the clinical topic would be well suited to a CME event.

CONCLUSIONS

Participation in eConsult services can improve timely access to respirologists while potentially avoiding clinic visits and significantly impacting referring PCPs clinical course of action. Using the most common clinical topics and types of questions for CME planning should be considered. Future research may include a cost analysis and provider perspectives on the role of eConsult in respirology care.

Bibliometric analysis of scientific publications in respiratory journals from China and other top-ranking countries between 2007 and 2017

INTRODUCTION

Respiratory disease remains one of the leading causes of mortality and morbidity worldwide.

OBJECTIVES

In this study, we aimed to compare the quantity and quality of scientific publications in the field of respirology from the United States, the United Kingdom, Germany, Canada and China.

METHODS

Articles published in 58 respiratory journals from 2007 to 2017 were screened with Science Citation Index Expanded database. The number of total and annual articles, article types, impact factor (IF), h-index, citations and articles in the high-impact journals from the corresponding country were collected for quantity and quality comparisons. The correlation of socioeconomic factors and annual publications was also analysed.

RESULTS

A total of 93078 articles were published worldwide in respiratory journals from 2007 to 2017. The United States contributed the largest proportion (34399 (37.0%)), followed by the United Kingdom (9494 (10.2%)), Germany (6918 (7.4%)) and Canada (6574 (7.1%)). Publications from China represented the 6th, but this quantity is rapidly increasing. The United States occupies the dominant place in all kinds of article types under investigation in the study, except in the category of meta-analysis. For total and average citations, China still lags behind the other 4 countries in the study. The annual numbers of articles from China, Canada and the United States were positively correlated with gross domestic product (P < 0.05).

CONCLUSIONS

The United States has played predominant role in respiratory research for the last 11 years. Although China has made great progress in the number of published articles over the past decade, the quality of these publications needs further improvement.

Influence of breathing patterns and orthostatic stress on postural control in older adults

AIM

To investigate the influence of breathing patterns and blood pressure behavior postural control in older adults.

METHODS

A total of 20 older adults carried out spontaneous, controlled (15 cycles/min) and deep (6 cycles/min) breathing trials, in random order. In this session, the heart rate was recorded continuously and blood pressure measured every 3 min. In addition, the challenge from sitting to an active standing position was carried out with eyes closed during 6 min on a baropodometer plate with electromyography recording. The root mean square (RMS) of electromyography was calculated.

RESULTS

There were significant differences in the postural control with spontaneous breathing from the first minute (center of pressure [COP]-area 216.40 ± 116.70 mm² ) in comparison with the third minute (COP-area 79.35 ± 68.11 mm² ; d = 0.89; P < 0.01) and the sixth minute (COP-area 70.24 ± 41.26 mm² ; d = 0.60; P < 0.05) of active standing. Furthermore, deep breathing significantly increases the COP-area (158.50 ± 126.2 mm² ) at the sixth minute of active standing in comparison with spontaneous breathing (70.24 ± 41.26 mm² ; d = 0.80; P < 0.01). There were also significant differences in systolic blood pressure during spontaneous breathing between the baseline measures (sitting position 123 ± 11 mmHg) and the first minute of active standing (117 ± 13 mmHg; d = 0.24; P < 0.05). Furthermore, electromyography activity of the tibialis anterior increased during the deep (17.52 ± 9.21 RMS) and controlled breathing (16.75 ± 5.26 RMS) compared with the spontaneous condition (14.93 ± 5.56 RMS; d = 0.17; P < 0.05).

CONCLUSIONS

The present data provide important insight into the respiratory and hemodynamics effects of postural control in older adults. The current data confirm that deep breathing causes periodic perturbation in the neuromuscular compensation of the lower limbs. Geriatr Gerontol Int 2018; 18: 692-697.

Non-invasive mechanical ventilation in elderly patients: A narrative review

The treatment of acute respiratory failure with non-invasive ventilation (NIV) as a first-line therapy is increasingly common in intensive care units. The reduced invasiveness of NIV leads to better outcomes than endotracheal intubation in carefully selected groups of patients. Furthermore, the use of NIV as a palliative treatment for respiratory failure and dyspnea has become increasingly common. NIV also has an impact on the use of "do not intubate" orders. In the present narrative review, we explore the use and outcome of NIV in elderly patients. To accomplish this, we reviewed the most recent available medical literature. Geriatr Gerontol Int 2017; 17: 689-696.

Non-invasive mechanical ventilation in elderly patients: A narrative review

The treatment of acute respiratory failure with non-invasive ventilation (NIV) as a first-line therapy is increasingly common in intensive care units. The reduced invasiveness of NIV leads to better outcomes than endotracheal intubation in carefully selected groups of patients. Furthermore, the use of NIV as a palliative treatment for respiratory failure and dyspnea has become increasingly common. NIV also has an impact on the use of "do not intubate" orders. In the present narrative review, we explore the use and outcome of NIV in elderly patients. To accomplish this, we reviewed the most recent available medical literature. Geriatr Gerontol Int 2017; 17: 689-696.

Iatrogenic exacerbation of pulmonary arteriovenous malformation in a patient with benign metastasizing leiomyoma

We present a case of a middle-aged woman with known benign metastasizing leiomyoma presenting with pleural effusion. After ultrasound-guided drainage of the largest cyst was performed, the patient became hypoxemic. Chest computerized tomography (CT) showed a large tortuous vessel adjacent to the biggest cyst that had been drained. A 10-fold increase in the diameter of this vessel was noted when compared to CT scan performed 24 h before the procedure. A 20% right-to-left shunt was observed on nuclear medicine shunt study. To our knowledge, this is the first reported case of metastasizing leiomyoma with coexistent pulmonary arteriovenous malformation.