Acute Care POCUS — Lung & Diaphragm Ultrasound
Lung and diaphragm point-of-care ultrasound is an established, evidence-supported bedside assessment for ICU/acute-care physiotherapists and respiratory therapists, with substantial interrater reliability and demonstrated influence on respiratory-physiotherapy decisions (atelectasis vs effusion vs consolidation, airway-clearance targeting, mobilization safety, ventilator weaning readiness).
The accurate credential path is a focused POCUS Certificate/Certification track (e.g., Inteleos POCUS Certification Academy Lung and Critical Care offerings) layered on POCUS Fundamentals — distinct from the outpatient RMSK pathway.
In acute care, US findings directly change PT/RT decisions — distinguishing recruitable atelectasis from effusion/consolidation, targeting airway clearance, and informing weaning readiness via diaphragm thickening fraction. Direct PT-attributable outcome trials remain limited, capping the score below elite.
Highly applicable to the ICU/acute cardiopulmonary PT and RT caseload (ventilated, post-op, ARDS, difficult-to-wean), but near-zero relevance to general outpatient PT — high within its niche, narrow overall.
PTs/RTs generally cannot bill diagnostic ultrasound; value is realized as bedside decision support within salaried hospital roles, not as a billable procedure.
A rapid bedside scan can triage chest radiographs/CT, accelerate identification of treatable pathology, and avoid unsafe interventions — strong workflow efficiency once competency is achieved.
Real and growing in ICU/respiratory teams, but adoption is still early (surveys show ~30% of ICU therapists use lung US) and gated by training access and governance.
Patients are typically critically ill/ventilated, so patient-perceived satisfaction is a minor factor; benefits accrue through safety and care quality.
A hospital/inpatient competency, not a cash-pay outpatient service line; there is no direct consumer-pay model.
Limited ability to attach a premium price; value is captured by the employing institution and care team, not by the individual clinician.
Within acute-care/cardiopulmonary PT/RT it is a strong differentiator — few clinicians hold validated lung/diaphragm POCUS competency, making the holder distinctive in hiring.
Minimal practice-owner leverage; this is an employed-clinician skill in institutional settings, not a scalable private-practice revenue engine.
Hospitals and ICU teams increasingly value bedside US competency, but it is one competency among many and not yet a hiring requirement.
Once trained, the clinician adds diagnostic value with no added equipment cost on units that already own ultrasound.
A credentialed cardiopulmonary/acute-care POCUS skill set carries real academic credibility in DPT and RT programs with cardiopulmonary tracks.
Lung and diaphragm US is an active, publishable scholarship area (reliability, decision-impact, education/competency frameworks).
Highly teachable with clear image-acquisition, scoring (LUS score), and interpretation competencies; integrates into acute-care curricula and simulation labs.
The underlying evidence base (BLUE protocol, diaphragm thickening fraction for weaning, LUS reliability) is deep and well-cited.
Programs need some faculty with this competency to teach modern acute-care assessment, but it is not yet a widespread hiring criterion.
Builds on existing cardiopulmonary teaching infrastructure and shared ultrasound equipment — a relatively efficient curricular addition.
Supports rigorous designs — diagnostic accuracy vs CXR/CT, interrater-reliability studies, and treatment-effect monitoring.
Robust, expanding literature in high-impact journals (Chest, AJRCCM, Intensive Care Medicine, Australian Critical Care).
Fundable within weaning, ICU-acquired weakness, and rehab-outcome research, though PT/RT-led US is rarely the standalone funded aim.
A credible niche for an early-career researcher, but the field is competitive and physician/critical-care-led.
Excellent — intrinsically collaborative across intensivists, RTs, PTs, and nursing, aligning with weaning and mobilization research.
Bedside, repeatable, radiation-free measurements enable longitudinal data capture at modest incremental cost.
- 01Relevance of lung ultrasound in the diagnosis of acute respiratory failure: the BLUE protocolLichtenstein DA, Mezière GA · Chest2008The bedside BLUE protocol diagnosed the cause of acute respiratory failure with ~90.5% accuracy, establishing the standardized sonographic signs used across acute-care lung US.Cross-sectionaldoi:10.1378/chest.07-2800
- 02Ultrasound for 'lung monitoring' of ventilated patientsBouhemad B, Mongodi S, Via G, Rouquette I · Anesthesiology2015Describes the lung ultrasound score (LUS) and its use to monitor aeration changes in ventilated patients, including response to recruitment and physiotherapy.Narrative reviewdoi:10.1097/ALN.0000000000000558
- 03Lung ultrasound for the diagnosis of pneumonia in adults: a systematic review and meta-analysisChavez MA, Shams N, Ellington LE, et al. · Respiratory Research2014Pooled lung ultrasound sensitivity ~0.94 and specificity ~0.96 for pneumonia, outperforming chest radiography for bedside detection of consolidation.Meta-analysisdoi:10.1186/1465-9921-15-50
- 04Diaphragm ultrasound as a predictor of successful extubation from mechanical ventilationDiNino E, Gartman EJ, Sethi JM, McCool FD · Thorax2014A diaphragm thickening fraction ≥30% predicted extubation success with 88% sensitivity and 71% specificity, validating bedside diaphragm US as a weaning-readiness tool.Cohort studydoi:10.1136/thoraxjnl-2013-204111
- 05Evolution of diaphragm thickness during mechanical ventilation: impact of inspiratory effortGoligher EC, Laghi F, Detsky ME, et al. · American Journal of Respiratory and Critical Care Medicine2015Diaphragm thickness fell >10% in ~44% of ventilated patients within days, driven by low inspiratory effort — establishing serial diaphragm US for monitoring ventilator-induced changes.Cohort studydoi:10.1164/rccm.201503-0620OC
- 06Mechanical ventilation-induced diaphragm atrophy strongly impacts clinical outcomesGoligher EC, Dres M, Fan E, et al. · American Journal of Respiratory and Critical Care Medicine2018Ultrasound-detected diaphragm atrophy during ventilation was associated with prolonged ventilation and complications, directly relevant to PT/RT diaphragm-protective and weaning strategies.Cohort studydoi:10.1164/rccm.201703-0536OC
- 07Critical illness-associated diaphragm weaknessDres M, Goligher EC, Heunks LMA, Brochard LJ · Intensive Care Medicine2017Reviews the high prevalence of diaphragm weakness in critically ill patients and its link to difficult weaning, framing the clinical need for diaphragm US.Narrative reviewdoi:10.1007/s00134-017-4928-4
- 08Lung ultrasound in the critically illLichtenstein DA · Annals of Intensive Care2014Comprehensive review of lung US signs and protocols in the ICU, detailing how sonographic patterns differentiate interstitial syndrome, consolidation, effusion, and pneumothorax.Narrative reviewdoi:10.1186/2110-5820-4-1
- 09Interrater reliability in assigning a lung ultrasound scoreHansell L, Milross M, Delaney A, Tian DH, Ntoumenopoulos G · Australian Critical Care2023Demonstrated substantial interrater reliability among assessors assigning the lung ultrasound aeration score in ventilated ICU patients, supporting reproducible scoring by trained therapists.Cross-sectionaldoi:10.1016/j.aucc.2022.10.008
- 10Quantification of changes in lung aeration associated with physiotherapy using lung ultrasound in mechanically ventilated patients: a prospective cohort studyHansell L, Milross M, Delaney A, Koo CM, Tian DH, Ntoumenopoulos G · Physiotherapy2023Lung ultrasound detected measurable changes in lung aeration associated with respiratory physiotherapy in ventilated ICU patients, supporting LUS as an outcome measure for PT interventions.Cohort studydoi:10.1016/j.physio.2022.11.001
- 11The use of diaphragm and lung ultrasound in acute respiratory physiotherapy practice and the impact on clinical decision-making: a systematic review and meta-analysisLockstone J, Love A, Lau YH, Hansell L, Ntoumenopoulos G · Australian Critical Care2024Synthesizes evidence that diaphragm and lung ultrasound influence respiratory physiotherapists' decision-making and can evaluate treatment effects, while noting the evidence base is still developing.Meta-analysisdoi:10.1016/j.aucc.2023.10.001
- 12An international survey exploring the adoption and utility of diagnostic lung ultrasound by physiotherapists and respiratory therapists in intensive careLau YH, Hayward S, Ntoumenopoulos G · Journal of the Intensive Care Society2023Survey of 320 ICU therapists across 30 countries found ~30% use lung US clinically; key barriers were training access, mentorship, and governance — defining the credential/training gap.Cross-sectionaldoi:10.1177/17511437221148920
- 13A proposed framework for point of care lung ultrasound by respiratory physiotherapists: scope of practice, education and governanceSmith M, Hayward S, Innes S · The Ultrasound Journal2022Proposes a scope-of-practice, education, and governance framework enabling respiratory physiotherapists to safely perform point-of-care lung ultrasound — the most direct PT scope anchor for this credential.Clinical guidelinedoi:10.1186/s13089-022-00266-6
- 14Lung point of care ultrasound (POCUS) in cardiorespiratory physiotherapy and respiratory therapy practices: current status and future directionsNtoumenopoulos G, Pizimolas GA, Mani S, Hayward S, Lockstone J · POCUS Journal2024Outlines the current state and future directions of lung POCUS within cardiorespiratory physiotherapy and respiratory therapy, including training, governance, and integration needs.Narrative reviewdoi:10.24908/pocus.v9i2.17854