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Does mechanical threshold inspiratory muscle training promote recovery and improve outcomes in patients who are ventilator-dependent in the intensive care unit? The IMPROVE randomised trial. Aust Crit Care 2022:S1036-7314(22)00092-3. [PMID: 36041982 DOI: 10.1016/j.aucc.2022.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 07/11/2022] [Accepted: 07/11/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND In patients who are ventilator-dependent in the intensive care unit, inspiratory muscle training may improve inspiratory muscle strength and accelerate liberation from the ventilator, but optimal training parameters are yet to be established, and little is known about the impact of inspiratory muscle training on quality of life or dyspnoea. Thus, we sought to ascertain whether inspiratory muscle training, commenced while ventilator-dependent, would improve outcomes for patients invasively ventilated for 7 days or longer. METHODS In this randomised trial with assessor blinding and intention-to-treat analysis, 70 participants (mechanically ventilated ≥7 days) were randomised to receive once-daily supervised high-intensity inspiratory muscle training with a mechanical threshold device in addition to usual care or to receive usual care (control). Primary outcomes were inspiratory muscle strength (maximum inspiratory pressure % predicted) and endurance (fatigue resistance index) at ventilator liberation and 1 week later. Secondary outcomes included quality of life (SF-36v2, EQ-5D), dyspnoea, physical function, duration of ventilation, and in-hospital mortality. RESULTS Thirty-three participants were randomly allocated to the training group, and 37 to the control group. There were no statistically significant differences in strength (maximum inspiratory pressure) (95% confidence interval [CI]: -7.4 to 14.0) or endurance (fatigue resistance index) (95% CI: -0.003 to 0.436). Quality of life improved significantly more in the training group than in the control group (EQ-5D: 17.2; 95% CI: 1.3-33.0) (SF-36-PCS: 6.97; 95% CI: 1.96-12.00). Only the training group demonstrated significant reductions in dyspnoea (-1.5 at rest, -1.9 during exercise). There were no between-group differences in duration of ventilation or other measures. In-hospital mortality was higher in the control group than in the training group (9 vs 4, 24% vs 12%, p = 0.23). CONCLUSIONS In patients who are ventilator-dependent, mechanical threshold loading inspiratory muscle training improves quality of life and dyspnoea, even in the absence of strength improvements or acceleration of ventilator liberation.
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Bissett BM, Wang J, Neeman T, Leditschke IA, Boots R, Paratz J. Which ICU patients benefit most from inspiratory muscle training? Retrospective analysis of a randomized trial. Physiother Theory Pract 2019; 36:1316-1321. [PMID: 30739584 DOI: 10.1080/09593985.2019.1571144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Background: Inspiratory muscle training (IMT) increases inspiratory muscle strength and improves quality of life in intensive care unit (ICU) patients who have been invasively mechanically ventilated for ≥7 days. The purpose of this study was to identify which patients benefit most from IMT following weaning from mechanical ventilation. Methods: Secondary analysis of a randomized trial of supervised daily IMT in 70 patients (mean age 59 years) in a 31-bed ICU was carried out. Changes in inspiratory muscle strength (maximum inspiratory pressure, MIP) between enrolment and 2 weeks (ΔMIP) were analyzed to compare the IMT group (71% male) and the control group (58% male). Linear regression models explored which factors at baseline were associated with ΔMIP. Results: Thirty-four participants were allocated to the IMT group where baseline MIP was associated with an increase in ΔMIP, significantly different from the control group (p = 0.025). The highest ΔMIP was associated with baseline MIP ≥ 28 cmH2O. In the IMT group, higher baseline quality of life (EQ5D) scores were associated with positive ΔMIP, significantly different from the control group (p = 0.029), with largest ΔMIP for those with EQ5D ≥ 40. Conclusions: Physiotherapists should target ICU patients with moderate inspiratory muscle weakness (MIP ≥28 cmH2O) and moderate to high quality of life (EQ5D>40) within 48 h of ventilatory weaning as ideal candidates for IMT following prolonged mechanical ventilation.
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Affiliation(s)
- Bernie M Bissett
- Discipline of Physiotherapy, University of Canberra , Canberra, Australia.,Physiotherapy Department, Canberra Hospital , Canberra, Australia
| | - Jiali Wang
- Statistical Consulting Unit, Australian National University , Canberra, Australia
| | - Teresa Neeman
- Statistical Consulting Unit, Australian National University , Canberra, Australia
| | - I Anne Leditschke
- Intensive Care Unit, Mater Hospital , Brisbane, Australia.,Mater Research Institute, University of Queensland , Brisbane, Australia
| | - Robert Boots
- Intensive Care Unit, Royal Brisbane and Women's Hospital , Brisbane, Australia.,School of Medicine, University of Queensland , Brisbane, Australia
| | - Jennifer Paratz
- Intensive Care Unit, Royal Brisbane and Women's Hospital , Brisbane, Australia.,School of Medicine, University of Queensland , Brisbane, Australia.,School of Health Sciences, Griffith University , Gold Coast, Australia
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Bissett B, Leditschke IA, Green M, Marzano V, Collins S, Van Haren F. Inspiratory muscle training for intensive care patients: A multidisciplinary practical guide for clinicians. Aust Crit Care 2018; 32:249-255. [PMID: 30007823 DOI: 10.1016/j.aucc.2018.06.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 05/29/2018] [Accepted: 06/01/2018] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVES To describe a multidisciplinary approach to inspiratory muscle training (IMT) for patients in the intensive care unit (ICU). BACKGROUND Inspiratory muscle weakness is a known consequence of prolonged mechanical ventilation, and there is emerging evidence that specific IMT can ameliorate this weakness. However, IMT is not yet standard practice in many ICUs, possibly because of the wide variety of methods reported and a lack of published practical guidelines. While the optimal parameters for IMT are yet to be established, we share our detailed methodology which has been shown to be safe in selected ventilator-dependent patients and is the only approach which has been shown to increase quality of life in ICU patients. METHODS Patients who have experienced invasive mechanical ventilation for at least 7 days can commence IMT in either the ventilator-dependent phase or when weaned from mechanical ventilation. Intensity should be prescribed based on maximum inspiratory pressure, which is measurable through the tracheostomy or endotracheal tube via the ventilator or a respiratory pressure meter. Using a removable threshold device, we recommend high-intensity training (5 sets of 6 breaths at a minimum of 50% of maximum inspiratory pressure) performed once per day, supervised by the physiotherapist, with intensity increased daily such that patients can only just complete the 6th breath in each set. RESULTS Using this high-intensity approach, IMT is likely to improve not only inspiratory muscle strength but also quality of life in patients recently weaned from mechanical ventilation of 7 days' duration or longer. Effective IMT requires a multidisciplinary approach to maximise feasibility, with doctors, nurses, and therapists working closely to optimise conditions for successful IMT. CONCLUSIONS This multidisciplinary approach to implement IMT in ICU patients should assist clinicians in translating best-available evidence into practice, with the potential to enhance patient recovery.
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Affiliation(s)
- Bernie Bissett
- Discipline of Physiotherapy, University of Canberra, Canberra Hospital, Canberra, Australia; Physiotherapy Department, Canberra Hospital, Canberra, Australia.
| | - I Anne Leditschke
- Intensive Care Unit, Mater Health, Mater Research Institute, University of Queensland, Brisbane, Australia
| | - Margot Green
- Physiotherapy Department, Canberra Hospital, Canberra, Australia
| | - Vince Marzano
- Physiotherapy Department, Canberra Hospital, Canberra, Australia
| | | | - Frank Van Haren
- Intensive Care Unit, Canberra Hospital, Canberra, Australia; School of Medicine, Australian National University, Canberra, Australia; Faculty of Health, University of Canberra, Canberra, Australia
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Tonella RM, Ratti LDSR, Delazari LEB, Junior CF, Da Silva PL, Herran ARDS, Dos Santos Faez DC, Saad IAB, De Figueiredo LC, Moreno R, Dragosvac D, Falcao ALE. Inspiratory Muscle Training in the Intensive Care Unit: A New Perspective. J Clin Med Res 2017; 9:929-934. [PMID: 29038671 PMCID: PMC5633094 DOI: 10.14740/jocmr3169w] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 09/18/2017] [Indexed: 11/29/2022] Open
Abstract
Background Prolonged use of mechanical ventilation (MV) leads to weakening of the respiratory muscles, especially in patients subjected to sedation, but this effect seems to be preventable or more quickly reversible using respiratory muscle training. The aims of the study were to assess variations in respiratory and hemodinamic parameters with electronic inspiratory muscle training (EIMT) in tracheostomized patients requiring MV and to compare these variations with those in a group of patients subjected to an intermittent nebulization program (INP). Methods This was a pilot, prospective, randomized study of tracheostomized patients requiring MV in one intensive care unit (ICU). Twenty-one patients were randomized: 11 into the INP group and 10 into the EIMT group. Two patients were excluded in experimental group because of hemodynamic instability. Results In the EIMT group, maximal inspiratory pressure (MIP) after training was significantly higher than that before (P = 0.017), there were no hemodynamic changes, and the total weaning time was shorter than in the INP group (P = 0.0192). Conclusion The EIMT device is safe, promotes an increase in MIP, and leads to a shorter ventilator weaning time than that seen in patients treated using INP.
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Affiliation(s)
- Rodrigo Marques Tonella
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Ligia Dos Santos Roceto Ratti
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | | | - Carlos Fontes Junior
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Paula Lima Da Silva
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Aline Ribeiro Da Silva Herran
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Daniela Cristina Dos Santos Faez
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Ivete Alonso Bredda Saad
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Luciana Castilho De Figueiredo
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Rui Moreno
- Neurological Intensive Care Unit, Sao Jose Hospital, Lisboa, Portugal
| | - Desanka Dragosvac
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, Department of Surgery, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Antonio Luis Eiras Falcao
- School of Medical Sciences, Intensive Care Unit of Clinical Hospital, Department of Surgery, State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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Zeiser E. [Physiotherapy interventions in the ICU : Outcome-relevant measurement parameters]. Med Klin Intensivmed Notfmed 2017; 112:356-370. [PMID: 28116462 DOI: 10.1007/s00063-016-0259-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 08/28/2016] [Accepted: 10/04/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Guidelines cannot provide differentiated recommendations for physiotherapy (PT) in intensive care medicine. Scientific publications for PT in the intensive care unit (ICU) usually only have low levels of evidence and often express safety and feasibility of PT in the ICU. OBJECTIVE Which measurement parameters are relevant for defining outcome and what interventions should one take into consideration? MATERIALS AND METHODS A literature review was conducted. This was based on a PubMed search with full text access, as well as specific definitions for physical therapy, intensive care and four out of seven conditions from the manual "Physiotherapy in intensive care". RESULTS The availability of 172 studies clearly shows that there is certainly PT research concerning the critical environment of the ICU. However, parameters for quantitative and qualitative detection of vigilance and state of consciousness as well as assessments to evaluate the mobility and the ability to help themselves are important for everyday use. CONCLUSIONS The difficulties of using PT in the ICU are not useful in ensuring the safety of the patient or performing a PT treatment. The conditions of the intensive care environment are not an obstacle. It is of immanent importance to use the limited resources of PT in an optimal and targeted manner in the ICU environment. The determination of ICU-adapted goals plays a crucial role.
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Affiliation(s)
- E Zeiser
- Berufsförderungswerk Mainz, DIPLOMA Hochschule - Private Fachhochschule Nordhessen, z.H. Dorit Engelmann Lortzingstraße 4, 55127, Mainz, Deutschland.
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Bissett BM, Leditschke IA, Neeman T, Boots R, Paratz J. Inspiratory muscle training to enhance recovery from mechanical ventilation: a randomised trial. Thorax 2016; 71:812-9. [PMID: 27257003 PMCID: PMC5013088 DOI: 10.1136/thoraxjnl-2016-208279] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 05/08/2016] [Indexed: 12/14/2022]
Abstract
Background In patients who have been mechanically ventilated, inspiratory muscles remain weak and fatigable following ventilatory weaning, which may contribute to dyspnoea and limited functional recovery. Inspiratory muscle training may improve inspiratory muscle strength and endurance following weaning, potentially improving dyspnoea and quality of life in this patient group. Methods We conducted a randomised trial with assessor-blinding and intention-to-treat analysis. Following 48 hours of successful weaning, 70 participants (mechanically ventilated ≥7 days) were randomised to receive inspiratory muscle training once daily 5 days/week for 2 weeks in addition to usual care, or usual care (control). Primary endpoints were inspiratory muscle strength and fatigue resistance index (FRI) 2 weeks following enrolment. Secondary endpoints included dyspnoea, physical function and quality of life, post-intensive care length of stay and in-hospital mortality. Results 34 participants were randomly allocated to the training group and 36 to control. The training group demonstrated greater improvements in inspiratory strength (training: 17%, control: 6%, mean difference: 11%, p=0.02). There were no statistically significant differences in FRI (0.03 vs 0.02, p=0.81), physical function (0.25 vs 0.25, p=0.97) or dyspnoea (−0.5 vs 0.2, p=0.22). Improvement in quality of life was greater in the training group (14% vs 2%, mean difference 12%, p=0.03). In-hospital mortality was higher in the training group (4 vs 0, 12% vs 0%, p=0.051). Conclusions Inspiratory muscle training following successful weaning increases inspiratory muscle strength and quality of life, but we cannot confidently rule out an associated increased risk of in-hospital mortality. Trial registration number ACTRN12610001089022, results.
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Affiliation(s)
- Bernie M Bissett
- School of Medicine, University of Queensland, Brisbane, Queensland, Australia Discipline of Physiotherapy, University of Canberra, Australia Physiotherapy Department, Canberra Hospital, Canberra, Australian Capital Territory, Australia
| | - I Anne Leditschke
- Intensive Care Unit, Canberra Hospital, Canberra, Australian Capital Territory, Australia Intensive Care Unit, Mater Hospital, Brisbane, Queensland, Australia School of Medicine, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Teresa Neeman
- Statistical Consulting Unit, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Robert Boots
- School of Medicine, University of Queensland, Brisbane, Queensland, Australia Intensive Care Unit, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia
| | - Jennifer Paratz
- School of Medicine, University of Queensland, Brisbane, Queensland, Australia Intensive Care Unit, Royal Brisbane and Women's Hospital, Herston, Queensland, Australia School of Alllied Health Sciences, Griffith University, Australia
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Volpe MS, Aleixo AA, Almeida PRMND. Influence of inspiratory muscle training on weaning patients from mechanical ventilation: a systematic review. FISIOTERAPIA EM MOVIMENTO 2016. [DOI: 10.1590/0103-5150.029.001.ar02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction: The inability of respiratory muscles to generate force and endurance is recognized as an important cause of failure in weaning patients from invasive mechanical ventilation (IMV). Thus, inspiratory muscle training (IMT) might be an interesting treatment option for patients with prolonged IMV weaning. Objective: The aim of this systematic literature review was to evaluate the effectiveness of inspiratory muscle training in weaning patients from mechanical ventilation and to identify the most effective type of training for this particular purpose. Methods: We searched PubMed, LILACS, PEDro and Web of Science for randomized clinical trials published in English or Portuguese from January 1990 until March 2015. Results: Eighty-nine studies were identified of which five were selected. A total of 267 patients participated in the five randomized clinical trials analyzed here. IMV duration before onset of training varied greatly among subjects. Three studies performed IMT using a threshold device and two studies used adjustments of ventilator pressure sensitivity. Four studies have shown that IMT resulted in a significant increase in inspiratory maximal pressure. Only two studies, however, have reported that IMT resulted in higher success rates in weaning patients from IMV. One study has found that patients showed a shorter ventilator weaning duration after IMT. Conclusion: IMT using pressure threshold devices results in increased inspiratory muscle strength and can therefore be considered a more effective treatment option and with the potential to optimize ventilator weaning success in patients at risk of prolonged IMV.
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Reliability and utility of the Acute Care Index of Function in intensive care patients: An observational study. Heart Lung 2015; 45:10-4. [PMID: 26542832 DOI: 10.1016/j.hrtlng.2015.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 09/25/2015] [Accepted: 09/25/2015] [Indexed: 11/21/2022]
Abstract
OBJECTIVES To establish the inter-rater reliability of the Acute Care Index of Function (ACIF) in intensive care unit (ICU) patients and determine whether ACIF scores have predictive utility beyond ICU discharge. BACKGROUND Accurate and reliable measures of physical function are required to describe the recovery trajectory of ICU survivors. The clinimetric properties of the ACIF are yet to be established in ICU patients. METHODS Prospective observational study in a single tertiary ICU. ACIF scores were recorded independently by 2 physiotherapists across a convenience sample of 100 physiotherapy assessments, and at ICU discharge. RESULTS Inter-rater reliability of total ACIF scores was very strong (ICC = 0.94). ACIF <0.40 at ICU discharge predicted hospital discharge to a destination other than home (area under ROC = 0.79, 95% CI 0.64-0.89) (sensitivity 0.78). CONCLUSION The ACIF has excellent inter-rater reliability in ICU patients and scores at ICU discharge predict the likelihood of discharge home. TRIAL REGISTRATION ACTRN12614001008617 (September 18 2014).
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Bissett B, Leditschke IA, Neeman T, Boots R, Paratz J. Weaned but weary: One third of adult intensive care patients mechanically ventilated for 7 days or more have impaired inspiratory muscle endurance after successful weaning. Heart Lung 2015; 44:15-20. [DOI: 10.1016/j.hrtlng.2014.10.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/01/2014] [Accepted: 10/02/2014] [Indexed: 11/17/2022]
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Mechanical ventilation weaning in inclusion body myositis: feasibility of isokinetic inspiratory muscle training as an adjunct therapy. Case Rep Crit Care 2014; 2014:902541. [PMID: 25147743 PMCID: PMC4131511 DOI: 10.1155/2014/902541] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 07/12/2014] [Indexed: 01/08/2023] Open
Abstract
Inclusion body myositis is a rare myopathy associated with a high rate of respiratory complications. This condition usually requires prolonged mechanical ventilation and prolonged intensive care stay. The unsuccessful weaning is mainly related to respiratory muscle weakness that does not promptly respond to immunosuppressive therapy. We are reporting a case of a patient in whom the use of an inspiratory muscle-training program which started after a two-week period of mechanical ventilation was associated with a successful weaning in one week and hospital discharge after 2 subsequent weeks.
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