Home Non Invasive Ventilation (NIV) Treatment for COPD-patients After a NIV-treated Exacerbation

Chronic Obstructive Pulmonary Disease Clinical Trial

Official title:

Home Non Invasive Ventilation (NIV) Treatment for COPD-patients After a NIV-treated Exacerbation

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT01513655
• Other study ID #: 2011-004866-13
• Status: Recruiting
• Phase: Phase 4
• Start date: July 2013
• Est. completion date: July 2020

Study information

• Verified date: November 2018
• Source: University Hospital, Gentofte, Copenhagen
• Contact: Philip Tønnesen, MDSc
• Phone: +45 21279858
• Email: phtoe[@]geh.regionh.dk
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Background: In chronic obstructive pulmonary disease, the prognosis for patients who have survived an episode of acute hypercapnic respiratory failure due to an exacerbation is poor. Despite being shown to improve survival and quality-of-life in stable patients with chronic hypercapnic respiratory failure, long-term noninvasive ventilation is controversial in unstable patients with frequent exacerbations, complicated by acute hypercapnic respiratory failure. In an uncontrolled group of patients with previous episodes of acute hypercapnic respiratory failure, treated with noninvasive ventilation, we have been able to reduce mortality and the number of repeat respiratory failure and readmissions by continuing the acute noninvasive ventilatory therapy as a long-term therapy.

Methods: Multi-center open label randomized controlled trial of 150 patients having survived an admission with noninvasive ventilatory treatment of acute hypercapnic respiratory failure due chronic obstructive pulmonary disease. The included patients are randomized to usual care or to continuing the acute noninvasive ventilation as a long-term therapy, both with a one-year follow-up period.

End points: The primary endpoint is one-year mortality; secondary endpoints are time to death or repeat acute hypercapnic respiratory failure, number of readmissions and repeat acute hypercapnic respiratory failure, exacerbations, dyspnea, quality of life, sleep quality, lung function, and arterial gases.

Description:

Background Noninvasive ventilation (NIV) has been shown to improve survival in patients with chronic obstructive pulmonary disease (COPD), admitted with acute hypercapnic respiratory failure (AHRF); and NIV is recommended as a treatment of AHRF due to COPD. COPD patients having survived AHRF have a poor prognosis; Chu et al. have shown one-year risks of readmission of 79.9%; of a new life-threatening event (death or repeat AHRF) of 63.3%; and of death of 49.1%.

Hypothetically, long-term NIV (LTNIV) can improve the prognosis for severe COPD. The majority of trials have focused on patients with chronic hypercapnic respiratory failure due to stable COPD (i.e., patients with no exacerbations prior to LTNIV initiation); and their results have been conflicting. However, in 2014, Köhnlein et al. published the results of a large randomized controlled trial (RCT) of LTNIV for stable patients with an arterial CO2 tension (Pa,CO2) of 7 kPa or higher: The patients treated with LTNIV had a one-year mortality of 12% vs. 33% for the controls; and the patients treated with LTNIV scored higher in health-related quality-of-life (HRQoL).

Three RCTs have studied the effects of LTNIV for unstable COPD, i.e., where the participants were enrolled after an admission with NIV treatment of AHRF: Cheung et al. and found that the patients treated with LTNIV had a lower rate of repeat AHRF (38.5%/year vs. 60.2%/year, p = 0.039); and Funk et al. found that the LTNIV group had a longer mean time to clinical worsening (391 days vs. 162 days; p = 0.0018). However, the largest RCT by Struik et al., showed no differences between the LTNIV group and the controls.

Little is known of what predicts AHRF in severe COPD. However, based on the large ECLIPSE study on exacerbations of COPD, Hurst et al. and Müllerova et al. showed that previous exacerbations predict new exacerbations; and that previous admissions due to exacerbations of COPD predict new admissions and death.

We assume that previous admissions with AHRF due to COPD could predict new admissions with AHRF and need of NIV, as well as death.

We retrospectively analyzed 20 patients who were treated with LTNIV and followed at our pulmonary ward. The patients were offered LTNIV if they had been admitted for NIV treatment of AHRF at least twice. We found that the patients' number of AHRF episodes and admissions due to COPD decreased significantly. And only four of the patients (20%)—considerably less than the 49.1% showed by Chu et al.—died within one year after initiation. Furthermore, these highly selected patients tolerated LTNIV well.

Aim The aim of this RCT is to investigate whether LTNIV can reduce mortality or repeat AHRF in patients who have been admitted for NIV treatment of AHRF due to COPD; and, secondarily, whether LTNIV can reduce mortality per se and the number of repeat AHRF, readmissions, and exacerbations, and improve quality of life.

Methods/Design

Design The study is a multi-center randomized, controlled, open-label study. The participants are included during an admission with NIV treatment of AHRF due to COPD. If the patient gives consent (see below), he or she is randomized to either LTNIV or usual care. The acute NIV therapy is continued for as long the patient presents a hypercapnic acidosis or severe dyspnea without NIV; hereafter, NIV is ceased in the patients in the control group, whereas it is continued with the same settings in the LTNIV patients. When stable and when deemed appropriate by a physician, the patients are discharged.

The included patients will be given the possibility of contacting an acute hotline, operated by a nurse.

One week after discharge, all patients are visited by a nurse. The patients are followed in the outpatient departments with visits 1, 3, 6, 9, and 12 months after discharge.

A participant who is readmitted will not be re-randomized. If the participant is in the intervention group, LTNIV is resumed, if paused.

Consent When stabilized and able to have a small pause from NIV, the patient is presented to the study. If interested, the patient is formally informed of the study by one of the attending physicians. This is typically 2 days after admission, although individual. The information session is held with a physician who has devoted time for this and who is not disturbed. When informed, the consent form is signed by the patient and the informing physician. If the participant wants time for consideration, a new session will be planned one or two days later.

Intervention For the intervention group, the acute NIV treatment is continued as LTNIV with the pressures and settings which had reversed the respiratory failure and the hypercapnic acidosis. The participant is offered to initiate an average volume-assured pressure support, but this is not mandatory.

Before discharge, the participant and caregivers are trained in handling and cleaning the ventilator, tubes, masks, etc. The participant is told to use the ventilator for a minimum of six hours of daily, preferably during sleep.

At the home visits and outpatient consultations, LTNIV is optimized according to the participant's requests or complaints.

One month after discharge, LTNIV participants who have had only this one episode of AHRF and who do not feel a subjective improvement are offered to pause the LTNIV therapy, provided they have not had any of the following after discharge: exacerbation; need for antibiotics, increased oral corticosteroids, or inhaled medicine; hospitalization or visit to an emergency room or emergency physician due to COPD; fever of 38˚C or higher for at least one day; increased or purulent expectoration; or increasing dyspnea for at least one day.

If it is agreed to pause LTNIV, the participant is instructed to resume LTNIV at one or more of the above symptoms.

Randomization A total of 150 COPD patients will be included from the four wards. The participants are randomized to LTNIV or usual care in a 1:1 ratio, using a computer-generated block-randomization for each center. The participant is presented with a sealed envelope containing a piece of paper with either "A" (= LTNIV) or "B" (= usual care). The randomization list is stored at Gentofte Hospital in a sealed envelope. 50 sealed envelopes are prepared for each center.

Sample size / power calculation Chu et al. showed that the one-year risk of death COPD patients having survived an admission with NIV treatment of AHRF is 49.1%; We expect to be able to reduce this mortality to 25%.

We use these risks for the power calculation. We accept a 0.05 risk of type 1 error (α) and 0.2 of type 2 error (β). With a power of 0.8, the needed sample size is 122. With an expected dropout of 15%, we intend to include 150 participants, 75 in each arm.

Measurements Upon admission, we measure: arterial blood gases with Pa,CO2, Pa,O2, pH and StHCO3-, firstly to diagnose the AHRF and secondly, in order to titrate the NIV treatment; regular, venous blood samples, analyzing infectious parameters, red and white blood count, kidney- and liver parameters; electrocardiogram (ECG); and a chest x-ray.

These measurements are done as a standard at the acute admission and not as part of the protocol.

At discharge, we measure: lung function, i.e., FEV1, FVC and FIVC; peripheral oxygen saturation (SpO2%); arterial blood gases with Pa,CO2, Pa,O2, pH and StHCO3-; height and weight; MRC Dyspnea score; CAT, SRI and ESS questionnaires; and we note status of medication and long-term oxygen treatment (LTOT), when relevant.

For the intervention group, we read ventilator's SIM card in regard to compliance, daily use, and apnea-hypopnea index (AHI).

At the home visit one week after discharge, we measure: lung function and SpO2%.

For the intervention group, we ensure that the ventilator, the mask and the hose are well-functioning; and that the patient is well informed and uses the ventilator correctly.

At the outpatient visits, we measure: lung function; SpO2%; arterial blood gases; weight; exhaled concentration of carbon mono-oxide; MRCD; CAT, SRI and ESS questionnaires; and we note status of medication, smoking, and LTOT, when relevant.

For the intervention group, we read ventilator's SIM card in regard to compliance, daily use, and AHI.

At each outpatient visit and at the end of the patient's study period, we collect data on mortality, hospital admissions, exacerbations treated by a general practitioner or an emergency physician, and emergency room visits.

Collecting of data All participants have an individual case report file (CRF) in which all data will be noted. The CRF contains nine sections; a front page with the basic information on the participant, i.e., the patient number, date of consent, allocation, ventilator settings (if relevant) etc.; and a section for each event in the study, i.e., admission, discharge, home visit, and the five outpatient visits including completion data in the fifth.

The CRF contains no personally identifiable information. The files are stored in a locked room to which only the investigators have access.

Data Processing The primary outcome is the difference one-year-mortality between the LTNIV group and the control group, analyzed as an Intention-To-Treat analysis. The mortality is calculated with Chi^2, and survival time is calculated in a Cox proportional hazards regression, using Kaplan-Meier and log rank.

The differences between the study's two groups will be computed using Chi^2-statistics for the dichotomous variables and t-tests for the continuous variables, assuming that data will follow a normal distribution. Differences in time to a given event are calculated in a Cox proportional hazards regression, using Kaplan-Meier survival statistics and log rank.

For all comparisons, p < 0.05 is the level of significance. For the sample size calculation, we used SAS (Statistical Analysis System, version 9.4).

We will use the latest versions of SAS for the statistical analyses.

Publications Both positive and negative results will be published in national and international journals and at conferences, symposia, etc.

Ethics The study was approved by the Research Ethics Committee, the Data Protection Agency, and the Danish Health Authority. The trial is registered at clinicaltrials.org, registration number NCT01513655.

Biological material The only biological samples taken are general blood biochemistry and arterial blood gases. This is the standard for any admission and outpatient visit. The samples are handled by the Dept. of Clinical Biochemistry according to current guidelines; after analysis, the samples are destroyed. No biological material is stored.

Arterial blood gas samples measure approximately 1mL; venous blood samples measure approximately 10-15 mL.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 150
• Est. completion date: July 2020
• Est. primary completion date: July 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion Criteria:

• Patient admitted with a NIV-requiring exacerbation of COPD

• COPD with a FEV1/FVC <0.7 after bronchodilatation.

• = 1 acute hypercapnic respiratory failure (AHRF *).

• Optimal medical treatment of COPD, ie. inhaled steroids, long-acting ß2-agonist Tiotropium, according to GOLD guidelines.

• Address in Capital Region

• Patients are able to give verbal consent and sign a written consent form and understand Danish-

Exclusion Criteria:

• Severely depressed level of consciousness / confusion / non-cooperative.

• Respiratory rate <12/min

• Severe hypoxia, such as requiring more than 15L O2/min.

• Large amounts of sputum.

• Vomiting and high risk for aspiration.

• Inability to accept NIV.

• Recent abdominal, facial or upper airway surgery.

• Malignancy or life expectancy <6 months because of disease other than COPD

• Known obstructive sleep apnea syndrome (OSA)

• Metabolic acidotic component - StHCO3- < 20 mM

Related Conditions & MeSH terms

• Acute Exacerbation of Chronic Obstructive Airways Disease
• Chronic Hypercapnic Respiratory Failure
• Chronic Obstructive Pulmonary Disease
• Hypercapnia
• Lung Diseases
• Lung Diseases, Obstructive
• Pulmonary Disease, Chronic Obstructive
• Respiratory Insufficiency

Intervention

Device:
• LTNIV
LTNIV with the ventilator and the settings and pressures which reversed the respiratory failure and the hypercapnic acidosis. We know the patients are able to tolerate these settings. The ventilators are Philips A30. The patients must use the ventilator for a minimum of six hours a night.

Locations

Country	Name	City	State
Denmark	Dept. of Pulmonary Medicine Y, UH Gentofte	Hellerup
Denmark	Dept. of Internal Medicine O, UH Herlev	Herlev
Denmark	Dept. of Pulmonary Medicine and Cardiology, UH Hvidovre	Hvidovre
Denmark	Dept. of Pulmonary Medicine, L, UH Bispebjerg	København NV

Sponsors (2)

Lead Sponsor	Collaborator
University Hospital, Gentofte, Copenhagen	Philips Respironics

Country where clinical trial is conducted

Denmark, 

References & Publications (9)

Cheung AP, Chan VL, Liong JT, Lam JY, Leung WS, Lin A, Chu CM. A pilot trial of non-invasive home ventilation after acidotic respiratory failure in chronic obstructive pulmonary disease. Int J Tuberc Lung Dis. 2010 May;14(5):642-9. — View Citation

Chu CM, Chan VL, Lin AW, Wong IW, Leung WS, Lai CK. Readmission rates and life threatening events in COPD survivors treated with non-invasive ventilation for acute hypercapnic respiratory failure. Thorax. 2004 Dec;59(12):1020-5. — View Citation

Funk GC, Breyer MK, Burghuber OC, Kink E, Kirchheiner K, Kohansal R, Schmidt I, Hartl S. Long-term non-invasive ventilation in COPD after acute-on-chronic respiratory failure. Respir Med. 2011 Mar;105(3):427-34. doi: 10.1016/j.rmed.2010.09.005. Epub 2010 Nov 26. — View Citation

Hurst JR, Vestbo J, Anzueto A, Locantore N, Müllerova H, Tal-Singer R, Miller B, Lomas DA, Agusti A, Macnee W, Calverley P, Rennard S, Wouters EF, Wedzicha JA; Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints (ECLIPSE) Investigators. Susceptibility to exacerbation in chronic obstructive pulmonary disease. N Engl J Med. 2010 Sep 16;363(12):1128-38. doi: 10.1056/NEJMoa0909883. — View Citation

Köhnlein T, Windisch W, Köhler D, Drabik A, Geiseler J, Hartl S, Karg O, Laier-Groeneveld G, Nava S, Schönhofer B, Schucher B, Wegscheider K, Criée CP, Welte T. Non-invasive positive pressure ventilation for the treatment of severe stable chronic obstructive pulmonary disease: a prospective, multicentre, randomised, controlled clinical trial. Lancet Respir Med. 2014 Sep;2(9):698-705. doi: 10.1016/S2213-2600(14)70153-5. Epub 2014 Jul 24. — View Citation

Kolodziej MA, Jensen L, Rowe B, Sin D. Systematic review of noninvasive positive pressure ventilation in severe stable COPD. Eur Respir J. 2007 Aug;30(2):293-306. Epub 2007 Apr 25. Review. — View Citation

Müllerova H, Maselli DJ, Locantore N, Vestbo J, Hurst JR, Wedzicha JA, Bakke P, Agusti A, Anzueto A. Hospitalized exacerbations of COPD: risk factors and outcomes in the ECLIPSE cohort. Chest. 2015 Apr;147(4):999-1007. doi: 10.1378/chest.14-0655. — View Citation

Ram FS, Wellington S, Rowe BH, Wedzicha JA. Non-invasive positive pressure ventilation for treatment of respiratory failure due to severe acute exacerbations of asthma. Cochrane Database Syst Rev. 2005 Jan 25;(1):CD004360. Review. Update in: Cochrane Database Syst Rev. 2005;(3):CD004360. — View Citation

Struik FM, Sprooten RT, Kerstjens HA, Bladder G, Zijnen M, Asin J, Cobben NA, Vonk JM, Wijkstra PJ. Nocturnal non-invasive ventilation in COPD patients with prolonged hypercapnia after ventilatory support for acute respiratory failure: a randomised, controlled, parallel-group study. Thorax. 2014 Sep;69(9):826-34. doi: 10.1136/thoraxjnl-2014-205126. Epub 2014 Apr 29. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Time to death or repeat AHRF with need of NIV	Measured by Kaplan Meier plot and log rank with a Cox proportional hazards regression. Intention-to-treat analysis.; Secondarily, mortality will be analyzed as Per-protocol as well	1 year
Secondary	Hospitalizations (time to - and absolute number)	Measured by Kaplan Meier plot, logrank and absolute data. Both ITT and PP	1 year
Secondary	Health related quality of life	measured by the CAT and SRI questionnaires	1 year
Secondary	medication status	use of medication during one year's follow-up	1 year
Secondary	Dyspnea	The MRC dyspnea scale	1 year
Secondary	Number of contacts with ER, GP because of COPD	Comparison of absolute numbers	1 year
Secondary	Number of days admitted	Comparison of absolute numbers	1 year
Secondary	Mortality	Measured by Kaplan Meier plot and log rank with a Cox proportional hazards regression. But also a comparison of absolute numbers.; Intention-to-treat analysis.	1 year
Secondary	Number of repeat AHRF with need for NIV	Measured by Kaplan Meier plot and log rank with a Cox proportional hazards regression. But also a comparison of absolute numbers.; Intention-to-treat analysis.	1 year