Quantification of changes in lung aeration associated with physiotherapy using lung ultrasound in mechanically ventilated patients: a prospective cohort study

ESICM-ESPNIC international expert consensus on quantitative lung ultrasound in intensive care

PURPOSE

To provide an international expert consensus on technical aspects and clinical applications of quantitative lung ultrasound in adult, paediatric and neonatal intensive care.

METHODS

The European Society of Intensive Care (ESICM) and the European Society of Paediatric and Neonatal Intensive Care (ESPNIC) endorsed the project. We selected an international panel of 20 adult, paediatric and neonatal intensive care experts with clinical and research expertise in quantitative lung ultrasound, plus two non-voting methodologists. Fourteen clinical questions were proposed by the chairs to the panel, who voted for their priority (1-9 Likert-type scale) and proposed modifications/supplementing (two-round vote). All the questions achieved the predefined threshold (mean score > 5) and 14 groups of 3 mixed adult/paediatric experts were identified to develop the statements for each clinical question; predefined groups of experts in the fields of adult and paediatric/neonatal intensive care voted statements specific for these subgroups. An iterative approach was used to obtain the final consensus statements (two-round vote, 1-9 Likert-type scale); statements were classified as with agreement (range 7-9), uncertainty (4-6), disagreement (1-3) when the median score and ≥ 75% of votes laid within a specific range.

RESULTS

A total of 46 statements were produced (4 adults-only, 4 paediatric/neonatal-only, 38 interdisciplinary); all obtained agreement. This result was also achieved by acknowledging in the statements the current limitations of quantitative lung ultrasound.

CONCLUSION

This consensus guides the use of quantitative lung ultrasound in adult, paediatric and neonatal intensive care and helps identify the fields where further research will be needed in the future.

Appropriateness of respiratory physiotherapy positioning for acute lobar collapse

BACKGROUND

Positioning is an important physiotherapy treatment modality for the management of aeration loss associated with acute lobar atelectasis (ALA). Physiotherapists typically rely on lung auscultation and interpretation of chest x-ray (CXR) to inform treatment selection. These tools lack diagnostic accuracy, which could limit the ability of a physiotherapist to locate ALA and select an appropriate treatment position.

OBJECTIVES

The objectives of this study were to determine the number of clinical physiotherapist treatment positions found to be in agreement with lung ultrasound (LUS)-identified aeration loss and to determine the diagnostic accuracy of CXR and lung auscultation against LUS as the reference standard for locating aeration loss in mechanically ventilated patients with ALA.

METHODS

A prospective cohort study was conducted in a tertiary teaching hospital in Sydney. Mechanically ventilated adult patients in critical care with ALA were included. Physiotherapist-selected positions were compared against location of aeration loss based on LUS results to determine appropriateness. Location of aeration loss as identified by CXR results and lung auscultation was compared against LUS as the reference standard to determine diagnostic accuracy.

RESULTS

Forty-three participants were included in this study. Four out of 43 patients (9.3%) were positioned appropriately. The rate of true positives for CXR and auscultation in locating aeration loss were highest in the lower lobes. Lung auscultation had higher sensitivities (16.7%-97.4%) than CXR (0%-59.5%) in a majority of lobes when detecting location of aeration loss. CXR had higher specificities (16.7%-100%) than lung auscultation (0%-64.9%) in a majority of lobes when detecting location of aeration loss.

CONCLUSIONS

Physiotherapists did not deliver appropriate positioning in a majority of cases. Overall, the diagnostic accuracy of lung auscultation and CXR in detecting location of ALA was low. Correctly locating lung aeration loss is imperative to ensure appropriate respiratory physiotherapy positions are selected. Physiotherapists should consider additional assessment tools such as LUS to increase their diagnostic ability.

Lung Ultrasound Score as a Predictor of Failure to Wean COVID-19 Elderly Patients off Mechanical Ventilation: A Prospective Observational Study

Background

The lung ultrasound score was developed for rapidly assessing the extent of lung ventilation, and it can predict failure to wean various types of patients off mechanical ventilation. Whether it is also effective for COVID-19 patients is unclear.

Methods

This single-center, prospective, observational study was conducted to assess the ability of the 12-region lung ultrasound score to predict failure to wean COVID-19 patients off ventilation. In parallel, we assessed whether right hemidiaphragmatic excursion or previously published predictors of weaning failure can apply to these patients. Predictive ability was assessed in terms of the area under the receiver operating characteristic curve (AUC).

Results

The mean age of the 35 patients in the study was (75 ± 9) years and 12 patients (37%) could not be weaned off mechanical ventilation. The lung ultrasound score predicted these failures with an AUC of 0.885 (95% CI 0.770-0.999, p < 0.001), and a threshold score of 10 provided specificity of 72.7% and sensitivity of 92.3%. AUCs were lower for previously published predictors of weaning failure, and right hemidiaphragmatic excursion did not differ significantly between the two groups.

Conclusion

The lung ultrasound score can accurately predict failure to wean critically ill COVID-19 patients off mechanical ventilation, whereas assessment of right hemidiaphragmatic excursion does not appear helpful in this regard.

Trial Registration

https://clinicaltrials.gov/ct2/show/NCT05706441.

The Role of Ultrasonography in the Process of Weaning from Mechanical Ventilation in Critically Ill Patients

Weaning patients from mechanical ventilation (MV) is a complex process that may result in either success or failure. The use of ultrasound at the bedside to assess organs may help to identify the underlying mechanisms that could lead to weaning failure and enable proactive measures to minimize extubation failure. Moreover, ultrasound could be used to accurately identify pulmonary diseases, which may be responsive to respiratory physiotherapy, as well as monitor the effectiveness of physiotherapists' interventions. This article provides a comprehensive review of the role of ultrasonography during the weaning process in critically ill patients.

The use of diaphragm and lung ultrasound in acute respiratory physiotherapy practice and the impact on clinical decision-making: A systematic review and meta-analysis

OBJECTIVES

Diaphragm and lung ultrasound (DLUS) is emerging as an important point-of-care respiratory assessment tool and is being used in clinical care by trained respiratory physiotherapists, both in Australia and internationally. However, the impact of DLUS on physiotherapists' clinical decision-making remains largely unknown. This systematic review aims to review the evidence for implementing DLUS in acute respiratory physiotherapy management.

REVIEW METHOD USED

We conducted a systematic review.

DATA SOURCES

We searched PubMed, Embase, CINAHL, CENTRAL, and Scopus from inception to 18th April 2023 for all original clinical studies reporting on the physiotherapy clinical decision-making, following a DLUS examination and/or where DLUS was used to evaluate the effect of respiratory physiotherapy, in adults over 18 years of age.

REVIEW METHODS

Two authors independently performed study selection and data extraction. Individual study risk of bias was assessed using the Newcastle-Ottawa Scale, and certainty in outcomes was assessed using the Grading of Recommendations, Assessment, Development, and Evaluations framework.

RESULTS

A total of seven observational studies (n = 299) were included, all of which were in the intensive care setting. DLUS changed physiotherapy diagnosis, management, and treatment in 63.9% (50-64%), 16.8% (15-50%), and 48.4% (25-50%) of patients, respectively. There was a significant improvement in the lung ultrasound score post respiratory physiotherapy treatment (mean difference -2.31, 95% Confidence Interval (95% CI) -4.42 to -0.21; very low certainty) compared to before respiratory physiotherapy treatment. Moderate risk of bias was present in six studies, and there was variance in the DLUS methodology across included studies.

CONCLUSIONS

The findings of this review suggest DLUS influences physiotherapy clinical decision-making and can be used to evaluate the effects of acute respiratory physiotherapy treatment. However, the available data is limited, and further high-quality studies are needed.

TRIAL REGISTRATION

This study is registered with the International Prospective Register of Systematic Reviews; CRD42023418312.