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Point of Care Ultrasound (PoCUS): Introduction · ShulichSchoolofMedicine&Denstry,UWO;& PoCUS...
Transcript of Point of Care Ultrasound (PoCUS): Introduction · ShulichSchoolofMedicine&Denstry,UWO;& PoCUS...
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Point of Care Ultrasound (PoCUS): Introduction George A. Fox MD, MSc, FRCPC, FCCP
!
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Financial Disclosure:
Within the past 5 years, I have received financial sponsorship, honoraria and hospitality from the following pharmaceutical companies:
• Actelion • Astra-Zeneca • Bayer HealthCare • Boehringer Ingelheim • InterMune • Novartis
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Learning Objectives: At the end of this session and workshop, the participant(s) will:
• NOT be skilled ultra-sonographer’s
• NOT be able to perform a comprehensive “consultative” ultrasound procedure
• Recognize that ultrasound equipment in the hands of an
inexperienced operator may cause patient harm
• Recognize your limitations in bedside ultrasound and outline steps to improve your skills
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PoCUS
Definition: – An ultrasound examination provided
and performed at the bedside by the primary care physician (or their designate), usually as an adjunct to the physical examination, to identify the presence or absence of a limited number of specific findings.
CAR, 2013. www.car.ca
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PoCUS • Findings from the PoCUS examination
MUST be correctly integrated into the clinical decision making process.
• If you are not certain of all, or part of the PoCUS examination, you should NOT rely on those uncertain findings in the clinical decision making process.
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Noble, V.E., MGH, Boston, MA
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Cook, T. MD, Columbia, SC
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Moak, J.H., MD, RDMS; hFp://www.medicine.virginia.edu
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Moak, J.H., MD, RDMS; hFp://www.medicine.virginia.edu
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Moak, J.H., MD, RDMS; hFp://www.medicine.virginia.edu
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Cook, T. MD, Columbia, SC
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Shulich School of Medicine & DenOstry, UWO
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Shulich School of Medicine & DenOstry, UWO
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Moak, J.H., MD, RDMS; hFp://www.medicine.virginia.edu
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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Shulich School of Medicine & DenOstry, UWO; www.slideshare.net
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PoCUS
NEJM 2011, 364;8: 749-‐57
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Thoracic/Pleural Ultrasound
George A. Fox MD, MSc, FRCPC, FCCP
!
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Learning Objectives: At the end of this session and workshop, the participant(s) will be able to:
• Discuss the appropriate choice of ultrasound probes
• Identify the structures when examining the lung and pleural space
• Identify the pleura, and describe the findings of a pneumothorax
• Describe how B-mode/M-mode are used to identify a pneumothorax
• Identify common ultrasound “patterns” visualized in the thorax
• Describe how to perform a thoracentesis using ultrasound guidance
• Describe static and dynamic ultrasound guidance
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Thoracic Ultrasound:
hFp://westernsono.ca/tutorials-‐3/lung-‐ultrasound-‐image-‐interpretaOon-‐tutorial
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Thoracic Ultrasound:
hFp://westernsono.ca/tutorials-‐3/lung-‐ultrasound-‐image-‐interpretaOon-‐tutorial
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Thoracic Ultrasound: B-mode:
hFp://www.jrheum.org/content/39/8/1641
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Thoracic Ultrasound: M-mode:
hFp://www.icmteaching.com/ultrasound/lung%20ultrasound/styled-‐125
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Thoracic Ultrasound:
hFp://www.ncbi.nlm.nih.gov/pubmed/?term=lung+ultrasound
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Thoracic Ultrasound: Probes:
Phased Array Probe Linear Vascular Probe
hFp://westernsono.ca/tutorials-‐3/lung-‐ultrasound-‐basics-‐tutorial
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Thoracic Ultrasound: Probe Location:
Volpicelli, G., Emerg Radiol, 2008: 15:145-51
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Thoracic Ultrasound:
Lichtenstein, D., CHEST 2008, 134:117
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Thoracic Ultrasound:
Sensitivity (%)
Specificity (%)
PPV (%)
NPV (%)
Pleural Effusion
94 97 95 90
Alveolar Consolidation (Pneumonia)
90
98
88
95
Interstitial Syndrome (CHF, ARDS)
93
93
87
99
Complete Pneumothorax
100 96 100 98
Occult Pneumothorax
79 100 89 99
AECOPD 89 97 93 95
Pulmonary Embolism
81 99 94 98
Lichtenstein, D., Ann Int Care, 2014; 4:1-12
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Thoracic Ultrasound:
Lichtenstein, D., CHEST 2008, 134:117
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Thoracic Ultrasound: 5 sonographic “signs” used in the BLUE Protocol:
– Sliding Lung – A Lines – B Lines – Alveolar Consolidation – Pleural Effusion
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Thoracic Ultrasound: Lung Sliding:
http://westernsono.ca/tutorials-3/lung-ultrasound-image-interpretation-tutorial
Present
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Thoracic Ultrasound: Lung Sliding:
http://westernsono.ca/tutorials-3/lung-ultrasound-image-interpretation-tutorial
Present? Absent
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Thoracic Ultrasound: Lung Sliding, B-mode:
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Thoracic Ultrasound: Absent Lung Sliding, B-mode:
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Thoracic Ultrasound: Lung Sliding (B-mode/M-mode)
http://www.acep.org/
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Thoracic Ultrasound: Absent Lung Sliding:
Other causes:
– Pleural adhesion – Atelectasis – Lobectomy/Pneumonectomy – Main-stem intubation
- Compare with other lung - Look for “Lung Point” (100% specific for pneumothorax)
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Thoracic Ultrasound: “Lung Point”
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Thoracic Ultrasound: A Lines:
• Horizontal “reverberation” artifacts • Generally seen in Aerated Lungs • Parallel to the pleural line • Decay with increasing depth • Obliterated by B Lines
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Thoracic Ultrasound: A Lines:
• Seen in normal lung parenchyma – PAOP < 13 mmHg
• DD(x): – Obstructive Lung Disease (COPD/Asthma) – Pulmonary Embolism
• A Lines can be seen without lung sliding – search for pneumothorax
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Thoracic Ultrasound: A Lines:
http://www.pneumon.org
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Thoracic Ultrasound: A Lines:
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Thoracic Ultrasound: B Lines:
• Hyperechoic rays projecting vertically from pleural line to bottom of screen – Obliterate A Lines
• Identifies fluid in interlobular septum • “Interstitial” Syndrome – Bilateral • CHF, ARDS, ILD
– Unilateral • Pneumonia
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Thoracic Ultrasound: B Lines:
hFp://westernsono.ca/tutorials-‐3/lung-‐ultrasound-‐image-‐interpretaOon-‐tutorial
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Thoracic Ultrasound: B Lines:
http://www.criticalecho.com
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Thoracic Ultrasound: B Lines:
http://www.criticalecho.com
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Thoracic Ultrasound: B Lines:
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Thoracic Ultrasound B Lines:
Clinical Role of B Lines:
Fluid “Intolerant” vs
Fluid “Tolerant”
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Thoracic Ultrasound: A Lines vs B Lines:
hFp://www.scielo.br/scielo
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Thoracic Ultrasound: Consolidation:
http://westernsono.ca/tutorials-3/lung-ultrasound-image-interpretation-tutorial
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Thoracic Ultrasound: Consolidation:
Air bronchograms
Chest. 2009;135(6):1421-1425
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Thoracic Ultrasound: Consolidation:
hFp://www.criOcalecho.com/content/tutorial-‐9-‐lung-‐ultrasound
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Thoracic Ultrasound: Consolidation:
hFp://www.criOcalecho.com/content/tutorial-‐9-‐lung-‐ultrasound
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Thoracic Ultrasound: Pleural Effusion:
http://westernsono.ca/tutorials-3/lung-ultrasound-image-interpretation-tutorial
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Thoracic Ultrasound: Pleural Effusion:
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Thoracic Ultrasound: Pleural Effusion:
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Thoracic Ultrasound: Pleural Effusion: “Jelly Fish” sign
http://www.critcaresono.com
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Thoracic Ultrasound: Pleural Effusion: “Jelly Fish” sign / Lung Flapping
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Thoracic Ultrasound: Pleural Effusion:
Septations “Plankton” sign
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Thoracic Ultrasound: Thoracentesis:
http://www.critcaresono.com/
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Thoracic Ultrasound: Thoracentesis:
http://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/pulmonary/bedside-applications-of-ultrasound/
Localize deepest “pocket” of fluid in longitudinal and transverse plane
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Thoracic Ultrasound: Thoracentesis:
Must Identify: - Anechoic free space - Chest wall - Diaphragm
- Above vs below - Respiratory Movement
- Compressed Lung - “Flapping”
http://link.springer.com/referenceworkentry
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Thoracic Ultrasound: Thoracentesis:
“Static” Guidance “Dynamic” Guidance
http://www.critcaresono.com/
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Thoracic Ultrasound: Thoracentesis:
“Static” Guidance “Dynamic” Guidance
http://www.pocustoronto.com/articulate/thora/story.html
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Thoracic Ultrasound: Thoracentesis:
http://www.med.uottawa.ca/courses/
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Thoracic Ultrasound: Thoracentesis:
http://www.med.uottawa.ca/courses/
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Thoracic Ultrasound: Thoracentesis:
Pearls & Pidalls: – IdenOfy anatomic boundaries: • Anechoic free space • Chest wall • Diaphragm
– Diaphragm movement?
• Compressed lung – Lung flapping?
– R/O ascites: • Hepatorenal/splenorenal space vs pleural space?