Relevant Degree Programs
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G+PS regularly provides virtual sessions that focus on admission requirements and procedures and tips how to improve your application.
1. Indigenous lung health. Study 1 is to estimate the prevalence of chronic obstructive pulmonary disease in First Nations communities in north-central BC. We are also specific risk related to respiratory symptoms including indoor air quality and occupation. Study 2 is to develop a First Nations pulmonary rehabilitation program, that could include using telehealth to deliver a program. Study 3 aims to develop emergency planning for people with chronic disease living in remote and rural First Nations communities.
2. Pulmonary rehabilitation for individuals hospitalized with an acute exacerbation of COPD. This research program aims to investigate the health services delivery issues related to providing pulmonary rehabilitation in the hospital setting for patients with COPD who are admitted with an exacerbation of their disease. Research questions will include: current practice patterns related to inpatient exercise and mobility; barriers and facilitators to initiating these programs, key components of programs, program components [including exercise and education], and use of interdisciplinary teams.
Graduate Student Supervision
Doctoral Student Supervision (Jan 2008 - Mar 2019)
Background: Patients with chronic obstructive pulmonary disease (COPD) are known to have an increased risk of ischemic heart disease. Persistently elevated resting heart rate and arterial stiffness, two common clinical manifestations in COPD, are known determinants of myocardial ischemia as well as predictors of cardiovascular events. Controversies exist on the effect of pulmonary rehabilitation on these ischemic heart disease risk factors. No study has explored the effect of pulmonary rehabilitation on the resting heart rate - arterial stiffness relationship in COPD.Objectives and Methods: The overall objectives of this dissertation were to provide a comprehensive investigation of the resting heart rate and arterial stiffness in patients with COPD, and explore the impact of pulmonary rehabilitation on their relationship in this population. We describe the association between resting heart rate and prior myocardial infarction in patients with chronic lung disease attending pulmonary rehabilitation (Chapter 2). We test the reliability of resting heart rate and arterial stiffness measurements in COPD patients (Chapters 3 and 4). We determine the association between resting heart rate and arterial stiffness (Chapter 5), and explore the potential beneficial effects of standard pulmonary rehabilitation on resting heart rate and/or arterial stiffness in COPD (Chapter 6).Summary of findings: We showed that an elevated resting heart rate is a potential indicator of prior myocardial infarction in patients with chronic lung disease (Chapter 2). Resting heart rate and arterial stiffness measurements have excellent and substantial reliability, respectively, under a standardized procedure in COPD patients (Chapters 3 and 4). The association between resting heart rate and arterial stiffness in control subjects is not present in patients with COPD (Chapter 5). Standard pulmonary rehabilitation in COPD reduces arterial stiffness, but not resting heart rate, and does not impact the resting heart rate - arterial stiffness relationship (Chapter 6).Conclusions: This dissertation provides new knowledge on resting heart rate and arterial stiffness, as well as on the potential beneficial effects of pulmonary rehabilitation on these two ischemic heart disease risk factors in COPD patients.
Master's Student Supervision (2010-2017)
Pulmonary rehabilitation (PR) is a comprehensive intervention of self-management education and exercise training that improves quality of life, exercise tolerance, symptoms of dyspnea, and reduces the risk of hospitalization in patients living with chronic respiratory diseases such as chronic obstructive pulmonary disease, asthma, lung cancer, and interstitial lung disease. Despite the proven benefit of pulmonary rehabilitation, recent studies have found notable inconsistencies in its organization and delivery. Inconsistencies within clinical practice are likely to affect the quality in the delivery of pulmonary rehabilitation. Quality indicators (QIs) are tools similar to a checklist that can potentially remediate these concerns. While other jurisdictions have created quality indicators for pulmonary rehabilitation programs, their methodological approach to developing these quality indicators is questionable. This study developed 56 quality indicators with a rigorous approach using a modified RAND Appropriateness Method. A panel comprising twelve PR healthcare professionals and stakeholders was created to create a list of QIs. The panel rated each indicator based on four criteria (importance, scientific soundness, reliability, and feasibility) and listed which indicator they believed could determine a quality pulmonary rehabilitation program. This study recommends that the 56 QIs, based upon consensus, be used for operationalizing the evaluation and auditing of PR programs as well as for establishing clinical benchmarks.
Introduction: Chronic Obstructive Pulmonary Disease (COPD) symptoms of dyspnea, exercise intolerance, and reduced health related quality of life are best treated with pulmonary rehabilitation (PR). Despite benefits, transportation, availability of PR programs, and social support barriers limit PR access. Telerehabilitation (TR) may provide the solution by utilizing pulse oximetry to monitor patient oxygen saturation (SpO₂) and heart rate (HR), along with measures of exercise intensity to ensure patient safety during home-based, unsupervised rehabilitation exercise. Study Purpose: To test the validity and reliability of a smartphone system called LungFIT in measuring heart rate, oxygen saturation, and distance in a healthy population. The LungFIT’s functionality was also assessed. Methods: Functionality of the LungFIT was assessed by a time-to-complete test and the adapted Mobile Phone Usability Questionnaire (MPUQ). SpO₂ and HR measurements by 3 different LungFIT probes (Nonin, Masimo, and LionsGate Technologies) were evaluated during 5-minute cycle ergometry (50 watts at 60-70 revolutions/minute) and treadmill walking tests (3km/hr). Both tests were repeated 3 times. Distance measurements were assessed by outdoor walking tests of a 1 city block course. Results: SpO₂ measurements were valid with mean biases ranging between -0.93% and 0.88% and limits of agreement no greater than ±3.78% over the 3 LungFIT probes. The Masimo probe had the smallest mean biases ranging from 0.18% to 0.74% and mean limits of agreement ranging from ±1.94% (±0.93% 95% confidence interval) to ±2.79% (±1.34% 95% confidence interval). All probes had moderate to good SpO₂ measurement reliability (ICCs between 0.65-0.87) with the Masimo probe performing the best (all ICCs ≥ 0.82). During exercise, HR measurements were invalid (mean limits of agreement > 10.00 beats/min), but reliable (ICCs between 0.87-0.97). Time-to-complete assessments found no software issues, but revealed 4 instances of navigation or setup issues. The MPUQ showed ease of use despite lack of interface appeal. Conclusion: During exercise, the 3 LungFIT probes were reliable in measuring SpO₂ and HR, but only valid in measuring SpO₂. Overall, the Masimo probe was the most valid and reliable of the 3 probes tested. Future LungFIT prototypes will improve user interface and accuracy of distance measurements.
Background: Physical activity may reduce mortality risk in advanced chronic lung disease by optimizing functional capacity, which is a major prognostic indicator in lung transplantation candidates. There is uncertainty as to the optimal method to measure physical activity in this patient population. We assessed different commercially-available physical activity measurement techniques (flex heart rate monitoring (FHR); pedometry; tri-axial accelerometry; and multi-sensor technology) by investigating their agreement with indirect calorimetry (IC) in adult lung disease patients (chronic obstructive pulmonary disease (COPD), interstitial lung disease (ILD), and cystic fibrosis (CF)) with advanced pulmonary impairment. Methods: This is a cross-sectional method comparison study conducted on two separate days. We recruited consecutive COPD, ILD, and CF patients with physician diagnosis of advanced pulmonary impairment. On day one, participants performed cardiopulmonary exercise testing until exhaustion with measurements of oxygen uptake (VO₂) and heart rate (HR) collected. On day two, subjects had their VO₂ and HR measured during standardized resting and sub-maximal activity. Simultaneous VO₂ and HR measures from both days were used to develop individual regressions for FHR-derived energy expenditure (EE). We then simultaneously measured each subject’s EE using a variety of index measures of physical activity and IC during standardized “free-living” type activities and varying intensities of sub-maximal cycle exercise. Results: In a sample of eight participants (CF, n=5; COPD, n=2; ILD, n=1), Flex HR methods using submaximal (FMSUB) and CPET-derived (FMCPX) calibrations showed the best agreement and interchangeability with IC during free-living and cycling activities compared to the SenseWear (SW) and ActiCal (AC) devices as evidenced by lower mean differences with IC and widths of limit of agreement (LOA) + 95% confidence interval (CI). For the secondary index methods assessed, the Tractivity and DigiWalker devices significantly over and underestimated IC EE respectively (p0.05) over the entire protocol. Conclusion: Our study found that the Flex HR method for EE estimation had the lowest bias and variability during free-living activities and exercise. EE estimation using Flex HR methods may be potentially useful clinical tools to ensure metabolic energy balance and activity monitoring in advanced lung disease groups.