pocus for the internist: lungs & pericardial effusionspocus for the internist: lungs &...
TRANSCRIPT
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POCUS for the Internist:
Lungs & Pericardial
EffusionsJeremy S. Boyd, MD, FACEP
Asst. Professor of Emergency Medicine
Vanderbilt University
Medical Illustrations courtesy of Robinson Ferre, MD, FACEP
Vanderbilt University
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No Financial
Disclosures
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One Federal Grant
Disclosure
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Lots of Cognitive
Disclosures
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-Unknown (or at least to be revealed)
“I think its great, and I’m sure for those techies
who can use it that it will revolutionize their
practice in the right clinical circumstances. That
being said, I am extremely doubtful that it will
ever come into general use. To do it well takes
too much time, and it can be a hassle for both
the physician and the patient.”
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POCUS Rule #1:
Ultrasound is a tool.
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POCUS Rule #2:
Ultrasound is not a substitute for
clinical judgment.
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Ultrasound Basics
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t
brightness
top = closest to probe
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From Soni et al, Point-of-Care Ultrasound, 1st edition,
2014
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Acoustic
Impedance(Tissues Reflect
Soundwaves Differently)
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POCUS
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POCUS
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40yo patient presents to the office with the complaint
of post-prandial abdominal pain, especially after eating
at her favorite hot chicken establishment (even when
ordered mild).
Does she have gallstones?
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72yo m with COPD, CHF, 1ppd smoker complains of
worsened dyspnea with exertion, orthopnea. Breath
sounds with faint wheezing and diminished bilaterally,
R > L.
Does he have a pleural effusion?
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Lung Ultrasound
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-Keith Wrenn, MD, FACP, FAAEM
“The lungs should be seen and not heard.”
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-never said by Keith Wrenn, MD, FACP, FAAEM
“The lungs should be seen (with soundwaves).”
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Lung Anatomy
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Slide 43
Chest Wall
Skin
RibParietal Pleura
Visceral Pleura
Intercostal Muscle
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Slide 44
Rib
Parietal Pleura
Visceral Pleura
Intercostal Muscle
Chest Wall
Skin
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Costophrenic Angle
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Costophrenic Angle
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Probe Placement
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Depends on the Clinical Question…
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Pneumothorax
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Pleural Effusion
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Pulmonary Edema
Right Left
14 2
3
14 2
3
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Understanding
Ultrasound Artifacts
of the Lung
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1.Mirror Artifact
2.Comet Tail Artifact
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Requires 2 Conditions
1. Smooth surface
2. Doesn’t transmit sound
• Lung
• Bone
• Air Filled Structure
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Slide 56
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A
A
A
“A-lines”
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A
A
A
Dry Lung
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Comet Tails
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airwater
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air H2O
H2O
H2O
H2Oair
air
airair
H2O
H2O
airair
H2O
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air H2O
H2O
H2O
H2Oair
air
airair
H2O
H2O
airair
H2OH2O
H2O
H2OH2O
H2O
air
airair
1 returning echomany returning echos
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Slide 64
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Comet Tail Artifact
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B B B
“B-lines”
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B B B
Wet Lung
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The B-Line
1. Arises from the
pleura
2. “Laser Like”
3. Reaches the bottom
of the ultrasound
screen
4. Moves with
respiration
5. Erases A-lines
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Lung Pathology
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Potential Pathology
1. Pneumothorax =
Lung Sliding = Aerated lung is touching the chest wall
2. Interstitial Edema =
A lines (Dry Lung) or B Lines (Wet Lung)
3. Consolidation =
Fluid/Puss filled Alveoli
4. Pleural Fluid
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Potential Pathology
1. Pneumothorax =
Lung Sliding = Aerated lung is touching the chest wall
2. Interstitial Edema =
A lines (Dry Lung) or B Lines (Wet Lung)
3. Consolidation =
Fluid/Puss filled Alveoli
4. Pleural Fluid
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Lung Sliding
Parietal Pleura
Visceral Pleura
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Lung Sliding
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Lung Point
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Slide 75
Lung Point =
Edge of the Pneumothorax
Air
Lung
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Air
Lung
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Lung Point
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Potential Pathology
1. Pneumothorax =
Lung Sliding = Aerated lung is touching the chest wall
2. Interstitial Edema =
A lines (Dry Lung) or B Lines (Wet Lung)
3. Consolidation =
Fluid/Puss filled Alveoli
4. Pleural Fluid
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A-Lines
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A Lines
with PTX
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B-Lines
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B-Lines
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B-Lines
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The Meaning of B-lines
• B-lines are not necessarily pathologic
• 3 or more is abnormal
• Scanning protocols help to understand
significance
– probe placement matters
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Pathology (3 or More B-Lines)
Increased Lung Water
– ARDS/ALI
– Cardiogenic Pulmonary Edema
– Infection • PNA (viral or bacterial)
– Pneumonitis (i.e. HAPE)
– Contusion
Pulmonary Fibrosis
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Location
&
Number
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Zone 1
Zone 2
Zone 3
1 or 2 here
can be normal
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B-Lines = Lung Water
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Scanning Protocols:
Volpicelli
1
4 2 2
13
3
4
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Scanning Protocols:
Lichtenstein
LatAnt Ant
Pos
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Potential Pathology
1. Pneumothorax =
Lung Sliding = Aerated lung is touching the chest wall
2. Interstitial Edema =
A lines (Dry Lung) or B Lines (Wet Lung)
3. Consolidation =
Fluid/Puss filled Alveoli
4. Pleural Fluid
![Page 92: POCUS for the Internist: Lungs & Pericardial EffusionsPOCUS for the Internist: Lungs & Pericardial Effusions Jeremy S. Boyd, MD, FACEP Asst. Professor of Emergency Medicine Vanderbilt](https://reader030.vdocuments.mx/reader030/viewer/2022040212/5e81dc21b24eab24396ae2ef/html5/thumbnails/92.jpg)
Consolidation
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Consolidation
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Consolidation
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Consolidation
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Potential Pathology
1. Pneumothorax =
Lung Sliding = Aerated lung is touching the chest wall
2. Interstitial Edema =
A lines (Dry Lung) or B Lines (Wet Lung)
3. Consolidation =
Fluid/Puss filled Alveoli
4. Pleural Fluid
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Normal
CPA
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Pleural Effusion
Spine Sign
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Pleural Fluid Normal
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Pleural Effusion
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Pleural Effusion with Consolidation
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Pleural Effusion
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Clinical Application
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Included in systematic review
History and physical: n=31
ECG: n=11
CXR: n=18
BNP/NT-proBNP*: n=41
Bedside echo: n=4
Lung ultrasound: n=8
Bioimpedance: n=4
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SENS SPEC
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+Test
-Test
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Pericardial Effusion
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Anatomy
Pericardium• Wraps around heart
• “ends” at major vessels
Pericardial fluid• Normal = 15-50 cc
Best Windows• Sitting = Subcostal
• Supine = PSLA
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Top 5 Causes
1. Malignancy 30%
2. Idiopathic 15%
3. Acute MI / Post cath 15%
4. Infectious 15%
5. Uremia 10%
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No
Pericardial
Effusion
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Small
Pericardial
Effusion
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Large
Pericardial
Effusion
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Pericardial Effusion Size
< 1 cm = Small
1-2 cm = Moderate
> 2 cm = Large
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Pericardial Effusion Size
Measure in Diastole = when the effusion is the smallest
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If the heart is
surrounded by fluid
how do I tell if it is
pleural or pericardial
fluid?
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Tamponade?
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5 Sonographic Signs
1. Pericardial effusion
2. Enlarged and plethoric IVC
3. Right atrial systolic collapse
4. RV Diastolic Collapse
5. All chambers underfilled & hyperdynamic
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Tale of Two IVCs
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5 Sonographic Signs
1. Pericardial effusion
2. Enlarged and plethoric IVC
3. Right atrial systolic collapse
4. RV Diastolic Collapse
5. All chambers underfilled & hyperdynamic
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Pulsus Paradoxus?
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LR+ = 5.9
LR- = 0.03
Roy et al, JAMA 2007
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(Remember Rule #1)
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-Unknown (or at least to be revealed)
“I think its great, and I’m sure for those techies
who can use it that it will revolutionize their
practice in the right clinical circumstances. That
being said, I am extremely doubtful that it will
ever come into general use. To do it well takes
too much time, and it can be a hassle for both
the physician and the patient.”
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-John Forbes, FRCP, FRS
“"… I have no doubt whatever, from my own
experience of its value, that it will be
acknowledged to be one of the greatest
discoveries in medicine by all those who are of a
temper, and in circumstances, that will enable
them to give it a fair trial. That it will ever come
into general use, notwithstanding its value, I am
extremely doubtful; because its beneficial
application requires much time, and gives a
good deal of trouble both to the patient and the
practitioner…”
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Ultrasound is a tool.
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Ultrasound is a tool.
Use it wisely.
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Thank
you.
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E-FAST Exam
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But wait. There’s more…
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Vascular Access
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Vascular Access
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Vascular Access
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Vascular Access
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Cardiac Arrest
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Intubation