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Effect of Pursed-Lip Breathing With Different I:E Ratios on Respiratory Outcomes in COPD Patients (PLB I:E Ratio)

30. april 2026 opdateret af: Scholastica Fina Aryu Puspasari

Effectiveness of Different Inspiratory-Expiratory Ratios (1:3, 1:4, and 1:5) in Pursed-Lip Breathing on Respiratory Rate, Oxygen Saturation, and Dyspnea in Patients With Chronic Obstructive Pulmonary Disease: A Quasi-Experimental Study

The goal of this clinical trial is to evaluate whether different inspiratory-expiratory (I:E) ratios in the pursed-lip breathing (PLB) technique can improve respiratory outcomes in patients with stable Chronic Obstructive Pulmonary Disease (COPD) aged 40 years and older. The primary purpose is to determine whether a specific breathing intervention can improve respiratory function.

The main questions it aims to answer are:

Does PLB with different I:E ratios (1:3, 1:4, and 1:5) reduce respiratory rate in COPD patients? Does PLB with different I:E ratios improve oxygen saturation and reduce dyspnea severity?

Researchers will compare PLB with I:E ratios of 1:3, 1:4, and 1:5 and a control group receiving standard care to see if different ratios produce different effects on respiratory rate, oxygen saturation, and dyspnea levels.

Participants will:

Perform pursed-lip breathing using assigned I:E ratios (1:3, 1:4, or 1:5) for 10 minutes Be assigned to either an intervention group or a control group (standard care) Have their respiratory rate measured before and after the intervention Have their oxygen saturation measured using a pulse oximeter Report their dyspnea level using the Modified Borg Scale before and after the intervention

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Chronic Obstructive Pulmonary Disease (COPD) is a progressive respiratory condition characterized by persistent airflow limitation, dyspnea, and impaired gas exchange. It remains a leading cause of morbidity and mortality worldwide, with a disproportionately high burden in low- and middle-income countries. Dyspnea is one of the most debilitating symptoms experienced by COPD patients and is closely associated with reduced functional capacity and quality of life. Non-pharmacological interventions, particularly breathing exercises, play an important role in symptom management.

Pursed-lip breathing (PLB) is a simple, low-cost, and widely recommended breathing technique in COPD management. It works by prolonging the expiratory phase, increasing positive airway pressure, preventing airway collapse, and improving ventilation efficiency. Despite its widespread use, there is currently no standardized inspiratory-expiratory (I:E) ratio for PLB. Variations in clinical practice may result in inconsistent outcomes, and evidence comparing different I:E ratios remains limited.

This study aims to evaluate the effectiveness of three commonly recommended I:E ratios (1:3, 1:4, and 1:5) in PLB on respiratory outcomes in patients with stable COPD. The outcomes of interest include respiratory rate, peripheral oxygen saturation (SpO₂), and dyspnea severity as measured by the Modified Borg Scale. By comparing these ratios, the study seeks to identify the most effective breathing pattern for optimizing respiratory function.

This study employs a quasi-experimental design with a pretest-posttest control group approach. A total of 122 participants diagnosed with stable COPD will be recruited from Respira Hospital Yogyakarta, Indonesia. Participants will be randomly assigned into four groups: three intervention groups receiving PLB with different I:E ratios (1:3, 1:4, and 1:5), and one control group receiving standard care without structured PLB intervention.

The intervention will be conducted in a controlled clinical setting. Participants in the intervention groups will be instructed to perform PLB in a seated high-Fowler position for 10 minutes under supervision. Each group will follow a specific breathing pattern: inhalation through the nose followed by prolonged exhalation through pursed lips according to the assigned I:E ratio. The control group will receive standard care without guided PLB.

Outcome measurements will be taken at baseline (pre-intervention) and immediately after the intervention. Respiratory rate will be measured by direct observation for one minute, oxygen saturation will be assessed using a calibrated pulse oximeter, and dyspnea will be evaluated using the Modified Borg Scale (0-10). Data will be analyzed using appropriate statistical tests to compare within-group and between-group differences.

This study is expected to contribute to the development of evidence-based guidelines for PLB implementation in COPD management, particularly in determining the optimal I:E ratio. The findings may help standardize clinical practice, improve respiratory outcomes, and enhance the quality of life of COPD patients. Additionally, the results may provide a foundation for future research on breathing techniques and non-pharmacological interventions in respiratory care.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

122

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

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Ingen

Beskrivelse

Inclusion Criteria:

  • Diagnosed with stable COPD
  • Age ≥ 40 years
  • Able to follow breathing instructions
  • Willing to participate and provide informed consent

Exclusion Criteria:

  • Cognitive impairment or decreased consciousness
  • Severe cardiovascular disease (heart failure, coronary artery disease, pulmonary hypertension)
  • Asthma-COPD overlap (ACO)
  • Acute respiratory infection (e.g., pneumonia)
  • Neuromuscular disorders affecting respiratory muscles

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Arm Group 1, PLB I:E 1:3
Participants perform PLB with inspiratory-expiratory ratio 1:3 (2 seconds inspiration, 6 seconds expiration)

Participants will be allocated into four study arms: three intervention groups and one control group.

Intervention Groups (PLB with Different I:E Ratios):

Participants in the intervention arms will perform Pursed-Lip Breathing (PLB) with specific inspiratory-to-expiratory (I:E) ratios as follows:

Group 1: I:E ratio 1:3 (2 seconds inspiration, 6 seconds expiration)

The procedure will be conducted in a seated position (high Fowler's position). Participants will be instructed to inhale slowly through the nose and exhale through pursed lips according to the assigned ratio. A metronome will be used to standardize breathing timing. Each session will last approximately 10 minutes and will be supervised by the researcher to ensure correct technique and safety.

stru

Eksperimentel: Arm Group 2, PLB I:E 1:4
Participants perform PLB with inspiratory-expiratory ratio 1:4 (2 seconds inspiration, 8 seconds expiration)

Participants will be allocated into four study arms: three intervention groups and one control group.

Intervention Groups (PLB with Different I:E Ratios):

Participants in the intervention arms will perform Pursed-Lip Breathing (PLB) with specific inspiratory-to-expiratory (I:E) ratios as follows:

Group 2: I:E ratio 1:4 (2 seconds inspiration, 8 seconds expiration)

The procedure will be conducted in a seated position (high Fowler's position). Participants will be instructed to inhale slowly through the nose and exhale through pursed lips according to the assigned ratio. A metronome will be used to standardize breathing timing. Each session will last approximately 10 minutes and will be supervised by the researcher to ensure correct technique and safety.

Eksperimentel: Arm Group 3, PLB I:E 1:5
Participants perform PLB with inspiratory-expiratory ratio 1:5 (2 seconds inspiration, 10 seconds expiration)

Participants will be allocated into four study arms: three intervention groups and one control group.

Intervention Groups (PLB with Different I:E Ratios):

Participants in the intervention arms will perform Pursed-Lip Breathing (PLB) with specific inspiratory-to-expiratory (I:E) ratios as follows:

Group 3: I:E ratio 1:5 (2 seconds inspiration, 10 seconds expiration)

The procedure will be conducted in a seated position (high Fowler's position). Participants will be instructed to inhale slowly through the nose and exhale through pursed lips according to the assigned ratio. A metronome will be used to standardize breathing timing. Each session will last approximately 10 minutes and will be supervised by the researcher to ensure correct technique and safety.

Ingen indgriben: Arm Group 4, Standard Therapy
Participants receive standard care without structured PLB intervention

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Primary Outcome 1: Respiratory Rate
Tidsramme: Baseline and immediately after 10-minute intervention
Respiratory rate measured as the number of breaths per minute at rest using direct observation for 60 seconds
Baseline and immediately after 10-minute intervention
Primary Outcome 2: Oxygen Saturation (SpO₂)
Tidsramme: Baseline and immediately after 10-minute intervention
Peripheral oxygen saturation measured using a calibrated pulse oximeter at rest.
Baseline and immediately after 10-minute intervention
Primary Outcome 3 Dyspnea Level
Tidsramme: Baseline and immediately after 10-minute intervention
Dyspnea assessed using the Modified Borg Scale (0-10), where higher scores indicate more severe breathlessness.
Baseline and immediately after 10-minute intervention

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Ledende efterforsker: Scholastica FA Puspasari, Master, STIKes Panti Rapih Yogyakarta

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

  • Hammoda Abu-Odah, Liu, N. X.-L., Wang, T., Zhao, I. Y., Yorke, J., Tan, J.-Y. B., & Molassiotis, A. (2025). Modified Borg Scale (mBorg), the numerical rating scale (NRS), and the Dyspnea-12 scale (D-12): Cross-scale comparison assessing the development of dyspnea in early-stage lung cancer patients. Supportive Care in Cancer, 33(5). https://doi.org/10.1007/s00520-025-09474-x
  • Gusmarta, G., & Oktarina, Y. (2025). Case Report : Implementation of Pursed-Lips Breathing Technique on Respiratory Rate and Oxygen Saturation in Chronic Obstructive Pulmonary Disease (COPD) Patients in the Pulmonary Ward of Raden Mattaher Hospital Jambi. Jurnal Keperawatan Universitas Jambi, 9(3), 8-12. https://doi.org/10.22437/jkuj.v9i3.47490
  • Cavalheri, V., Burtin, C., Formico, V. R., Nonoyama, M., Jenkins, S., Spruit, M. A., & Hill, K. (2020). Exercise training for people with chronic obstructive pulmonary disease. Cochrane Database of Systematic Reviews, (4), CD010039. https://doi.org/10.1002/14651858.CD010039.pub2
  • Burge, A. T., Gadowski, A. M., Jones, A., Romero, L., Smallwood, N. E., Ekström, M., Reinke, L. F., Saggu, R., Wijsenbeek, M., & Holland, A. E. (2024). Breathing techniques to reduce symptoms in people with serious respiratory illness: A systematic review. European Respiratory Review, 33(174), 240012. https://doi.org/10.1183/16000617.0012-2024
  • Bhatt, S. P., Nakhmani, A., Fortis, S., Strand, M. J., Silverman, E. K., Sciurba, F. C., et al. (2023). FEV1/FVC severity stages for chronic obstructive pulmonary disease. American Journal of Respiratory and Critical Care Medicine, 208(6), 676-684. https://pubmed.ncbi.nlm.nih.gov/37339502/
  • Anon. (2025, March 4). What is the recommended inspiratory to expiratory (I:E) ratio for ventilator settings in chronic obstructive pulmonary disease (COPD) exacerbation? Droracle.ai. https://www.droracle.ai/articles/22727/what-is-the-recommended-inspiratory-to-expiratory-ie-ratio

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

4. maj 2026

Primær færdiggørelse (Anslået)

7. august 2026

Studieafslutning (Anslået)

14. august 2026

Datoer for studieregistrering

Først indsendt

30. april 2026

Først indsendt, der opfyldte QC-kriterier

30. april 2026

Først opslået (Faktiske)

7. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

7. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. april 2026

Sidst verificeret

1. april 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 0511028601

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

IPD will not be shared because the study involves human participants and the data are subject to institutional and ethical restrictions that limit public data sharing. Only aggregated results will be reported.

Studiedata/dokumenter

  1. Studieprotokol
    Informations-id: scholastica fina
    Oplysningskommentarer: PLB Ratio
  2. Individuelt deltagerdatasæt
    Informations-id: scholastica_fina@stikespantira
    Oplysningskommentarer: In excel formula
  3. Statistisk analyseplan
    Informations-id: scholastica_fina@stikespantira
    Oplysningskommentarer: Interventional (Clinical Trial)
  4. Formular til informeret samtykke
    Informations-id: scholastica_fina@stikespantira
    Oplysningskommentarer: PIS and IC
  5. Charter for overvågning af dataovervågning
    Informations-id: scholastica_fina@stikespantira
    Oplysningskommentarer: DMC

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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