Not Signed In -
Mitral Valve Prolapse |
Ballooning mitral valve syndrome |
Clinical Trial: Endobronchial Valve for Emphysema Palliation Trial (VENT)
This study is no longer recruiting patients.
|
Purpose
| Condition | Intervention | Phase |
|---|---|---|
| Chronic Obstructive Pulmonary Disease Emphysema | Procedure: Emphasys Endobronchial Valve and procedure | Phase III |
MedlinePlus related topics: COPD (Chronic Obstructive Pulmonary Disease); Emphysema
Study Type: Interventional
Study Design: Treatment, Randomized, Open Label, Active Control, Parallel Assignment, Safety/Efficacy Study
Secondary Outcomes: - Pulmonary function testing at various time points through one year; - Quality of life measures at various time points through one year; - Other adverse event rates at various time points through one year
Expected Total Enrollment: 270
Study start: January 2004
Background:
Emphysema, caused primarily by smoking, is characterized by the gradual, irreversible breakdown of tissue and loss of elastic recoil within the lungs, causing them to the lose the ability to expel air and efficiently absorb oxygen. As this chronic condition inexorably progresses, the diseased, hyperinflated areas of the lung eventually fill the chest cavity, leaving less and less volume available for the viable lung tissue.
Lung volume reduction surgery (LVRS) has been shown to offer relief to patients suffering from emphysema when other treatment options fail. Researchers have continued to refine both technique and patient selection in order to improve outcomes. The objective of lung volume reduction is to eliminate dysfunctional, over-inflated regions of lung. Results similar to surgical removal have been obtained by plication (folding) and stapling without tissue removal. These results suggest that isolation of the dysfunctional lung region can achieve similar results to tissue removal.
The paradoxical effect of improving lung function by removing (or isolating) lung tissue demonstrates that breathlessness due to emphysema is a function of mechanical inefficiencies in addition to loss of gas-transfer surface area and other physiological mechanisms. At least in some patients, the mechanical compromise is the primary cause of their pulmonary incapacitation and these patients can benefit by addressing their inability to effectively inhale and exhale. Because LVRS reduces trapped gas, others have speculated that results similar to LVRS could be achieved bronchoscopically by reducing the volume of the hyperinflated regions with, or without, atelectasis.
Emphasys has developed a bronchoscopic approach to block inspiratory airflow into targeted, hyperinflated regions of the lung, while permitting exhaled gas to escape. This approach may lead to lung volume reduction and provide some of the clinical benefits of LVRS without the high risks and costs associated with such an invasive surgical procedure.
Comparison:
The primary object of this study is to assess the safety and efficacy of the Emphasys Endobronchial Valve (EBV) and procedure (with pulmonary rehabilitation) compared to medical management (with pulmonary rehabilitation) in patients with heterogeneous emphysema.
Eligibility
Inclusion Criteria:
- Diagnosed by HRCT with eligible heterogeneous disease distribution
- FEV1 < 45% predicted
- TLC > 100% predicted
- RV> 150% predicted
- Post Rehab 6 minute walk test > 140m
- Non-smoking 4 months
Exclusion Criteria:
Location Information
Frank C Sciurba, MD, Principal Investigator, University of Pittsburgh Medical Center.
More Information
Publications
Celli BR, Cote CG, Marin JM, Casanova C, Montes de Oca M, Mendez RA, Pinto Plata V, Cabral HJ. The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease. N Engl J Med. 2004 Mar 4;350(10):1005-12.
Sciurba FC, Rogers RM, Keenan RJ, Slivka WA, Gorcsan J 3rd, Ferson PF, Holbert JM, Brown ML, Landreneau RJ. Improvement in pulmonary function and elastic recoil after lung-reduction surgery for diffuse emphysema. N Engl J Med. 1996 Apr 25;334(17):1095-9.
Martinez FJ, de Oca MM, Whyte RI, Stetz J, Gay SE, Celli BR. Lung-volume reduction improves dyspnea, dynamic hyperinflation, and respiratory muscle function. Am J Respir Crit Care Med. 1997 Jun;155(6):1984-90.
Sabanathan A, Sabanathan S, Shah R, Richardson J. Lung volume reduction surgery for emphysema. A review. J Cardiovasc Surg (Torino). 1998 Apr;39(2):237-43. Review.
Geddes D, Davies M, Koyama H, Hansell D, Pastorino U, Pepper J, Agent P, Cullinan P, MacNeill SJ, Goldstraw P. Effect of lung-volume-reduction surgery in patients with severe emphysema. N Engl J Med. 2000 Jul 27;343(4):239-45.
Gelb AF, McKenna RJ Jr, Brenner M, Schein MJ, Zamel N, Fischel R. Lung function 4 years after lung volume reduction surgery for emphysema. Chest. 1999 Dec;116(6):1608-15.
Gierada DS, Yusen RD, Villanueva IA, Pilgram TK, Slone RM, Lefrak SS, Cooper JD. Patient selection for lung volume reduction surgery: An objective model based on prior clinical decisions and quantitative CT analysis. Chest. 2000 Apr;117(4):991-8.
Russi EW, Bloch KE, Weder W. Functional and morphological heterogeneity of emphysema and its implication for selection of patients for lung volume reduction surgery. Eur Respir J. 1999 Jul;14(1):230-6. Review.
Rogers RM, Coxson HO, Sciurba FC, Keenan RJ, Whittall KP, Hogg JC. Preoperative severity of emphysema predictive of improvement after lung volume reduction surgery: use of CT morphometry. Chest. 2000 Nov;118(5):1240-7.
Rogers RM, Coxson HO, Sciurba FC, Keenan RJ, Whittall KP, Hogg JC. Preoperative severity of emphysema predictive of improvement after lung volume reduction surgery: use of CT morphometry. Chest. 2000 Nov;118(5):1240-7.
Gelb AF, Zamel N, McKenna RJ Jr, Brenner M. Mechanism of short-term improvement in lung function after emphysema resection. Am J Respir Crit Care Med. 1996 Oct;154(4 Pt 1):945-51.
Swanson SJ, Mentzer SJ, DeCamp MM Jr, Bueno R, Richards WG, Ingenito EP, Reilly JJ, Sugarbaker DJ. No-cut thoracoscopic lung plication: a new technique for lung volume reduction surgery. J Am Coll Surg. 1997 Jul;185(1):25-32.
Hoppin FG Jr. Theoretical basis for improvement following reduction pneumoplasty in emphysema. Am J Respir Crit Care Med. 1997 Feb;155(2):520-5.
Iwasaki M, Nishiumi N, Kaga K, Kanazawa M, Kuwahira I, Inoue H. Application of the fold plication method for unilateral lung volume reduction in pulmonary emphysema. Ann Thorac Surg. 1999 Mar;67(3):815-7.
Kuwahira I, Iwasaki M, Kaga K, Iwamoto T, Tazaki G, Ishii M, Inoue H, Ohta Y. Effectiveness of the fold plication method in lung volume reduction surgery. Intern Med. 2000 May;39(5):381-4.
Fishman A, Martinez F, Naunheim K, Piantadosi S, Wise R, Ries A, Weinmann G, Wood DE; National Emphysema Treatment Trial Research Group. A randomized trial comparing lung-volume-reduction surgery with medical therapy for severe emphysema. N Engl J Med. 2003 May 22;348(21):2059-73. Epub 2003 May 20.
Toma TP, Hopkinson NS, Hillier J, Hansell DM, Morgan C, Goldstraw PG, Polkey MI, Geddes DM. Bronchoscopic volume reduction with valve implants in patients with severe emphysema. Lancet. 2003 Mar 15;361(9361):931-3.
Last Updated: August 12, 2005
Record first received: August 10, 2005
ClinicalTrials.gov Identifier: NCT00129584
Health Authority: United States: Food and Drug Administration
ClinicalTrials.gov processed this record on 2005-08-23
Resources
- American Heart Association
- Anatomy of the Human Heart (Texas Heart Institute)
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