Vascular Access, Paracentesis, and...
Transcript of Vascular Access, Paracentesis, and...
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Vascular Access,
Paracentesis,
and Thoracentesis
Rita Bakhru, MD, MS
Wake Forest University School of Medicine
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Disclosures
• Serve as Faculty at American College of
Physicians: Central Venous Line Placement
Workshop
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Vascular Access, Paracentesis,
Thoracentesis
• Indications
• Complications
• Anatomy Review
• Ultrasound:
• Equipment
• Use of Equipment
• Typical Images
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Most Common Sites for Vascular Access
• Internal Jugular Vein
• Femoral Vein
• Subclavian/Axillary Vein
• Peripheral Veins
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Assessing Vein
• Local anatomy
• Identification of artery vs. vein
• Is the vein patent?
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High Freq. Linear Array Probe
• Crystals in a flat head
• 6-13 MHz
• Default scan depth: 2.6cm
• Minimum: 1.9cm
• Maximum: 6cm
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Applications:
• Vascular Access
• Diagnostic Vascular
• Superficial biopsy guidance
• Nerve blockade
• Musculoskeletal evaluation
High Freq. Linear Array Probe
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Other Options• 5-10 MHz general linear
array
• 9 cm Scan Depth
• Applications:
• breast, vascular, venous
access, nerve, IMT,
musculoskeletal
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Internal Jugular Anatomy
• Anatomical
Triangle:– 2 heads of
sternocleidomastoid
– clavicle
N Engl J Med 2003; 348:1123-1133
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Neck Anatomy: Internal
Jugular Sternocleidomastoid
Internal Jugular
Internal Carotid
Thyroid
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Femoral Triangle Anatomy
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Femoral Triangle Anatomy
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Femoral Triangle Anatomy
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Vein Patency
• Patent veins will compress completely to a thin line
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IJ Compression
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Femoral Compression
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Venous Clot: Not compressible
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Proper Hand Position
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Probe Orientation
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Directing the Probe• Pitch = mvmt up, down
• Transducer = transverse
• Fanning or tilting towards head or feet
• Yaw = side to side turn
• Angling probe left or right toward patient’s flanks
• Roll = spinning on central long axis
• Transverse orientation becomes sagittalNoble et al. Emergency and Critical Care Ultrasound
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Roll: Cross-Sectional to Longitudinal
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Direct Needle Guidance
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Paracentesis
• Indications:
• Diagnostic evaluation of new onset ascites
• Diagnostic evaluation of known ascites for possible
secondary bacterial peritonitis
• Therapeutic paracentesis for comfort
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Paracentesis Complications• Circulatory Dysfunction (large-volume para):
• hypotension,
• hyponatremia
• AKI
• Persistent Leak
• Localized infection
• Abdominal wall hematoma
• Intra-abdominal Hemorrhage
• Injury to Intra-abdominal Organs
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Local Anatomy
Chest 2013;
143(4):1136–1139
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Body Ultrasound
• Anchor your hand
• Gel on hand
• Scanning: probe marker toward head
• > 2 scanning planes for imaging structures
• Transverse and longitudinal
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Probe Markers
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Body Imaging Planes• Longitudinal Probe Position
• Transducer along long axis of the body• Probe marker toward the patient’s head• Cephalad structures by the marker
• Transverse or Axial Probe Position• Transducer 90 degrees from long axis of body • Cross-sectional display• For most, marker oriented to patient’s right
• Coronal Probe Position• Positioning the transducer laterally• Keeping marker towards head
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Anatomical Orientation
www.saem.org/saemdnn/Education/Education
Resources/NarratedUltrasoundLectures
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Phased Array Probe
• Crystals: curved, convex array
• Reduces lateral resolution in deeper tissue
• 5-1 MHz
• Phased array
• Default Scan Depth: 16cm
• Minimum Depth: 4.7cm
• Maximum Depth: 35cm
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Phased Array Probe
• Applications:
• Cardiac
• Abdominal
• Obstetrics
• Biopsy
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Abdominal Ultrasound
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Paracentesis
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Real-Time Paracentesis
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Thoracentesis• Indications
• Diagnostic: Evaluation of New Pleural Effusion
• Therapeutic: Relief of Dyspnea
• Complications• Pneumothorax
• Reexpansion Pulmonary Edema
• Pneumothorax Ex Vacuo
• Puncture of Intra-Adbominal Organs
• Hemothorax
• Empyema/ Soft Tissue Infection
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Phased Array Probe• Crystals: curved, convex array
• Reduces lateral resolution in deeper tissue
• 5-1 MHz
• Phased array
• Default Scan Depth: 16cm
• Minimum Depth: 4.7cm
• Maximum Depth: 35cm
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Phased Array Probe
• Applications:
• Cardiac
• Abdominal
• Obstetrics
• Biopsy
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Body Ultrasound
• Anchor your hand
• Gel on hand
• Scanning: probe marker toward head
• > 2 scanning planes for imaging structures
• Transverse and longitudinal
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Probe Markers
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Anatomical Orientation
www.saem.org/saemdnn/Education/Education
Resources/NarratedUltrasoundLectures
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Thoracentesis Anatomy
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Thoracentesis Anatomy
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Patient Positioning:
Thoracentesis
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Ultrasound of Pleural Effusion
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Ultrasound of Pleural Effusion
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Loculated Pleural Effusion
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Hepatic Hydrothorax
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Questions?