rehabilitapulmonarexacerbacionesepoc
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http://www.alatorax.org/images/stories/demo/pdf/epoc/cursos/colombia_09/RehabilitaPulmonarexacerbacionesEPOC.pdfTRANSCRIPT
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Pulmonary Rehabilitation-2009- Moving Forward -
Richard Casaburi, Ph.D.,M.D.Los Angeles Biomedical Research
Institute at Harbor-UCLA Medical Center
Torrance, California, USA
Disclosures: Grants/Consultation for Boehringer-Ingelheim, Forest, Astra Zeneca, Novartis, Inogen, Pfizer, GlaxoSmithKline, Osiris, Roche
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Pulmonary Rehabilitation
…the standard of care for COPD
patients debilitated by their disease
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Chest 2007, 131:4S-42S
38 pages of EVIDENCE!
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Evidence Based Rehabilitation Guidelines
Evidence Grades:1,2 - Strength of Recommendation
based on balance of risks and benefits
A,B,C - Strength of Evidencebased on supporting evidence
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Evidence Based Rehabilitation Guidelines for COPD
Pulmonary rehabilitation:• Both low- and high-intensity exercise
training produce clinical benefits- 1A • improves the symptom of dyspnea - 1A• improves health-related quality of life - 1A
These benefits are generally of greater magnitude than for any
other COPD therapy
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Evidence Based Rehabilitation Guidelines for COPD
Pulmonary rehabilitation:• reduces the number of hospital days
and other measures of health care utilization - 2B
• induces psychosocial benefits - 2B
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Chest 2007, 131:4S-42S
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Rehabilitation in COPD
Why is rehabilitation poorly funded…and therefore poorly available?
• Inadequate lobbying• Inadequate evidence of benefit
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2008 - A Good Year for Pulmonary Rehabilitation
in the United States• Pulmonary Rehabilitation achieves
Assembly status in the ATS• Federal legislation establishing
pulmonary rehabilitation as a covered service under Medicare is passed
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Details of coverage decision being worked
out by CMS -implementation in January 1, 2010
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Rehabilitation in COPD
Why is rehabilitation poorly funded…and therefore poorly available?
• Inadequate lobbying• Inadequate evidence of benefit
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?
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Ann Int Med, 2008
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Ann Int Med, 2008
Change in CRQ
Dyspnea at 3 months
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Ann Int Med, 2008-6
4
14
24
34
44
54
Home-Based Center-Based
Change in 6MWD at 3 months
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Respir Med, 2007
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Respir Med, 2007
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Respir Med, 2007
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?
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Better Exercise Tolerance
Better Long-Term
Outcomes (e.g., survival)
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Better Exercise Tolerance
Better Long-Term
Outcomes (e.g., survival)
More Active During Daily
Life
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Better Exercise Tolerance
Better Long-Term
Outcomes (e.g., survival)
More Active During Daily
Life
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Better Exercise Tolerance
Better Long-Term
Outcomes (e.g., survival)
More Active During Daily
Life
?
?
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Do more active COPD patients survive longer?
• Garcia-Aymerich et al. Thorax, 2006– 2386 Danish COPD patients completed
activity questionnaire– Followed for 12.0±5.9 years for mortality
and other outcomes
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Do more active COPD patients survive longer?
• Garcia-Aymerich et al. Thorax, 2006– 2386 Danish COPD patients completed
activity questionnaire– Followed for 12.0±5.9 years for mortality
and other outcomes• Ringbaek et al., Clin Rehabil, 2005
– 226 Danish LTOT patients completed activity questionnaire
– Followed for mean of 8 years for mortality
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Are self-ratings of activity reliable?
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No long-term studies of influence of objectively assessed activity on
prognosis in COPD
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Is activity level increased by rehabilitation?
• Sewell et al., Chest - 2005• Walker et al., Thorax -2008• Steele et al. JCR -2008• Pitta et al. Chest -2008
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Is activity level increased by rehabilitation?
• Sewell et al., Chest - 2005 YES• Walker et al., Thorax -2008 YES• Steele et al. JCR -2008 NO• Pitta et al. Chest -2008 MAYBE
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Pitta et al., Chest, 2008
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Is activity level increased by rehabilitation?
• Sewell et al., Chest - 2005• Walker et al., Thorax -2008• Steele et al. JCR -2008• Pitta et al. Chest -2008
Differences in Activity Monitoring Technology and Duration May Explain Differences in Results
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Is activity level increased by rehabilitation?
• Sewell et al., Chest - 2005 2 days• Walker et al., Thorax -2008 2 days• Steele et al. JCR -2008 6 days• Pitta et al. Chest -2008 5 days
Differences in Activity Monitoring Technology and Duration May Explain Differences in Results
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?
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• 209 completed rehabilitation program
• 18 died in one-year follow-up period
• 49 failed to continue through 1-year evaluation (non-completers)
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Number Needed to Treat to Improve SGRQ by a Clinically Important
Amount for 1 Year ~ 1.6
N=142Completers
N=49Non-
completers
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Promising Approaches
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n=93
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Promising Approaches
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Combined Effects of Exercise Training and 30% Oxygen Breathing in Non-hypoxemic COPD
0
5
10
15
20
25
30
Tim
e (m
in)
Oxygen Training Air Training
Air-preOxygen-preAir-postOxygen-post
Before After Before After
** **
**
** *
Emtner et al., AJRCCCM, 2003
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Increase in Constant Work Rate Test Endurance after Exercise Training
02468
10121416
Tim
e (m
in)
Oxygentraining group
Air traininggroup
air and oxygenbreathing tests
* 38% greater gain in endurance
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Promising Approaches
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Anabolic steroidsCasaburi R, Bhasin S Cosentino L. et al. Effects of testosterone
replacement and resistance training in men with COPD. Am. J. Respir.Crit. Care Med. 170:870-878,2004.
P+NE T+NE P+E T+E-0.5
0.0
0.5
1.0
1.5
2.0mean ± SE
*
*
∆ L
eg L
ean
Bod
y M
ass
(kg)
*
P+NE T+NE P+E T+E0
20
40
60
80
100
120
140
160
180mean ± SE
*
*
∆ L
eg P
ress
(lb)
*
∆Leg Muscle Mass (kg) ∆Leg Muscle Strength (lb)
N=47
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• Fiber hypertrophy documented for both resistance training and testosterone
• Mediators of muscle anabolism increased
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• Fiber hypertrophy documented for both resistance training and testosterone
• Mediators of muscle anabolism increased
Wide use of testosterone unlikely because of potential side effects:
• virulization in women
• prostate stimulation in men
Selective androgen receptor modulators (SARMs), now entering clinical trials, are likely to overcome these problems
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Promising Approaches
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• Surface electrodes stimulate a motor nerve to induce repeated muscle contractions
• All studies small (n=15 to 18)• Two of three studies showed
increases in muscle strength and endurance vs. control group
• One study showed muscle stimulation, when added to exercise training, yielded additional strength, but not endurance, improvement
Electrical Muscle Stimulation
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• Surface electrodes stimulate a motor nerve to induce repeated muscle contractions
• All studies small (n=15 to 18)• Two of three studies showed
increases in muscle strength and endurance vs. control group
• One study showed muscle stimulation, when added to exercise training, yielded additional strength, but not endurance, improvement
Electrical Muscle Stimulation
Larger studies needed to define benefits and refine techniques
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Promising Approaches
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In ventilation feedback training, a computerized system encourages slower-deeper breathing pattern
33 patients completed VF training vs training alone
Less dynamic hyperinflation and trend for better exercise tolerance in VF group
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine• Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Evidence of Lack of Benefit
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Interval training
• Varga J, Porszasz J, Boda K, et al. Supervised high intensity continuous and interval training vs. self-paced training in COPD. Respir Med 2007; 101:2297-2304 (n=71)
• Arnardottir RH, Boman G, Larsson K, et al. Interval training compared with continuous training in patients with COPD. Respir Med 2007; 101:1196-1204 (n=60)
• Puhan MA, Busching G, Schunemann HJ, et al. Interval versus continuous high-intensity exercise in chronic obstructive pulmonary disease: a randomized trial. Ann Intern Med 2006; 145:816-825 (n=98)
• Mador MJ, Krawza M, Alhajhusain A et al. Interval training versus continuous training in patients with COPD. J Cardiopulm Rehabil 2009; 29:126-132. (n=21)
• Nasis IG, Vogiatzis I, Stratakos G, et al. Effects of interval-load versus constant-load training on the BODE index in COPD patients. Respir Med 2009 (in press) (n=42)
Recent COPD Studies
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Interval training
• Varga J, Porszasz J, Boda K, et al. Supervised high intensity continuous and interval training vs. self-paced training in COPD. Respir Med 2007; 101:2297-2304 (n=71)
• Arnardottir RH, Boman G, Larsson K, et al. Interval training compared with continuous training in patients with COPD. Respir Med 2007; 101:1196-1204 (n=60)
• Puhan MA, Busching G, Schunemann HJ, et al. Interval versus continuous high-intensity exercise in chronic obstructive pulmonary disease: a randomized trial. Ann Intern Med 2006; 145:816-825 (n=98)
• Mador MJ, Krawza M, Alhajhusain A et al. Interval training versus continuous training in patients with COPD. J Cardiopulm Rehabil 2009; 29:126-132. (n=21)
• Nasis IG, Vogiatzis I, Stratakos G, et al. Effects of interval-load versus constant-load training on the BODE index in COPD patients. Respir Med 2009 (in press) (n=42)
Recent COPD Studies
Decent sized studies!
Interval training not found superior to constant work rate training in any
of them.
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine• Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
trainingEvidence of Lack of Benefit
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Creatine Supplementation
• Fuld JP, Kilduff LP, Neder JA, et al. Creatine supplementation during pulmonary rehabilitation in chronic obstructive pulmonary disease. Thorax 2005; 60:531-537 (n=38)
• Faager G, Soderlund K, Skold CM, et al. Creatine supplementation and physical training in patients with COPD: a double blind, placebo-controlled study. Int J Chron Obstruct Pulmon Dis 2006; 1:445-453 (n=23)
• Deacon SJ, Vincent EE, Greenhaff PL, et al. Randomised controlled trial of dietary creatine as an adjunct therapy to physical training in COPD. Am J Respir Crit Care Med 2008 (n=100)
- During Pulmonary Rehabilitation -
No evidence for additive effects on exercise endurance to date
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Likely Impractical for Routine
Use
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
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82 COPD patients performed 4 endurance shuttle walk tests breathing
•21% O2, 79% N2
•28% O2, 72% N2
•21% O2, 79% He
•28% O2, 72% HeAJRCCM, 2006
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82 COPD patients performed 4 endurance shuttle walk tests breathing
•21% O2, 79% N2
•28% O2, 72% N2
•21% O2, 79% He
•28% O2, 72% HeAJRCCM, 2006
Problem with Heliox in rehabilitation: must provide entire respired volume of
Heliox gas
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
trainingLikely Impractical for Routine Use
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Eur Respir J, 2006n=29
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Eur Respir J, 2006
Pressure support training:
-requires 1:1 patient-to-therapist ratio
-is uncomfortable for the patient
n=29
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
Likely Impractical for Routine Use
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One-legged exercise• Dolmage TE, Goldstein RS. Effects of
one-legged exercise training of patients with COPD. Chest 2008; 133:370-376(n=18)
• Half trained with both legs for 30 minutes, half for 15 minutes with each leg; intensity increased as tolerated.
• One-legged exercise group demonstrated better performance in incremental, but not constant work rate, exercise testing, than two-legged group
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One-legged exercise• Dolmage TE, Goldstein RS. Effects of
one-legged exercise training of patients with COPD. Chest 2008; 133:370-376(n=18)
• Half trained with both legs for 30 minutes, half for 15 minutes with each leg; intensity increased as tolerated.
• One-legged exercise group demonstrated better performance in incremental, but not constant work rate, exercise testing, than two-legged group
Solid physiologic rationale…but awkward
Larger studies, perhaps with both intensity and session duration increased
as tolerated, would be of interest
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
trainingResearch Needed for Use in Special
Populations
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Nutritional SupplementationCan optimizing nutritional support improve the benefits of
rehabilitative exercise training?Steiner MC, Barton RL, Singh SJ, et al. Nutritional
enhancement of exercise performance in chronic obstructive pulmonary disease: a randomised controlled trial. Thorax 2003; 58:745-751
• 85 COPD patients participating in a 7 week rehabilitation program were assigned to carbohydrate supplement vs. placebo
• Supplemented patients gained more fat weight, but did not have greater exercise tolerance gains
More targeted nutritional interventions might yield better results
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
trainingResearch Needed for Use in Special
Populations
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• 8 weeks endurance training • ± hyperpnea training via a rebreathing circuit• In hyperpnea training group
– Respiratory muscle strength & endurance increased– No difference in exercise endurance between groups
Limit study to those with respiratory muscle weakness?
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Adjuncts to High Intensity Rehabilitative Exercise in COPD
• Bronchodilators• Supplemental
oxygen• Anabolic steroids• Electrical muscle
stimulation• Ventilation feedback
• Interval training• Creatine • Heliox breathing• Non-invasive ventilation• One-legged exercise• Nutritional
supplementation• Inspiratory muscle
training
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?
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Survival: the missing piece of the puzzle
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Question: Why does the US spend ~ $3 billion annually to provide COPD
patients with long-term oxygen therapy?
Answer: Because LTOT delivers an unequivocal
survival benefit
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Evidence considered conclusive despite:
•No confirmation since 1981
•Based on a total of < 300 patients
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Evidence Based Rehabilitation Guidelines for COPD
“There is insufficient evidence to determine whether pulmonary rehabilitation improves survival. No recommendation is provided.”
Evidence-Based PulmonaryRehabilitation, Chest, 2007
Does pulmonary rehabilitation improve survival?
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Ries, A. L. et. al. Ann Intern Med 1995;122:823-832
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Pulmonary Rehabilitation’s Mortality Trial
“Experts” believe patients participating in rehabilitation live longer, but this possibility has never received an adequate test in a clinical trial. Therapies that improve survival have a high priority. We think that a clinical trial is practical and we are working to get it underway.
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PRIMOPulmonaryRehabilitationImpactsMortalityOutcomes
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PRIMO• a ~ 10 center study,• ~ 800 patients discharged from the
hospital following a COPD exacerbation,
• patient accrual over ~ two years,• rehab vs. no-rehab, follow-up ~ 3 years• multiple outcomes, with mortality as
primary outcome
A Revised Application to NIH is Being Composed
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Pulmonary Rehabilitation- Moving Forward -
• Can rehabilitation be administered at home?• Is activity level increased by rehabilitation?• Can the benefits of rehabilitation be
maintained?• Can we make the exercise training component
more effective?• Can we demonstrate a survival benefit?