us and fb in the ed us and fb in the ed louise rang md frcpc rdms emergency ultrasound program...
TRANSCRIPT
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US and FB in the EDUS and FB in the ED
Louise Rang MD FRCPC RDMSLouise Rang MD FRCPC RDMSEmergency Ultrasound Program DirectorEmergency Ultrasound Program Director
Queen’s University, Kingston ONQueen’s University, Kingston ON© Louise Rang 2008© Louise Rang 2008
Louise Rang MD FRCPC RDMSLouise Rang MD FRCPC RDMSEmergency Ultrasound Program DirectorEmergency Ultrasound Program Director
Queen’s University, Kingston ONQueen’s University, Kingston ON© Louise Rang 2008© Louise Rang 2008
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OutlineOutline
Where’s the evidence? How is it useful? What do various FB look like? How do I do it? Tips & tricks
Where’s the evidence? How is it useful? What do various FB look like? How do I do it? Tips & tricks
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Why does it matter?Why does it matter?
Retained FB is Common Time consuming #4 cause of ED malpractice
cases
Retained FB is Common Time consuming #4 cause of ED malpractice
cases
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What tools do we have? 1What tools do we have? 1 Pro Con
Xray Readily availableGood for even small radio-opaque FBwith skin markers, some help for localisation
poor for plastic, woodno dynamic localisationSome radiation
CT less available”a big gun”poorer for small non-radio-opaque FBno help with localisation
Local Exploration
can diagnose & treat at same time
time consuminginvasivepatient trauma?false sense of security
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What tools do we have? 2What tools do we have? 2
Ultrasound! Available No radiation Dynamic Good for many types of FB (>2mm) May show other important structures
Ultrasound! Available No radiation Dynamic Good for many types of FB (>2mm) May show other important structures
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ConsCons poor for smaller FB <1-2mm Operator dependent need linear high frequency probe
poor for smaller FB <1-2mm Operator dependent need linear high frequency probe
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How do they compare in accuracy?
How do they compare in accuracy?
sensitivity specificity
Xray glass, metalXray other
95%low
CT 0-60%US radiologyUS ED
70-80%50-95%
86%50-90%
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Where is the evidence that we can do it?
Where is the evidence that we can do it?
Hill Ann EM 97 53 FB implanted in amputated
human legs + 27 control punctures2h practice sessionWood sn 93%Plastic sn 73%Sp 59%
Hill Ann EM 97 53 FB implanted in amputated
human legs + 27 control punctures2h practice sessionWood sn 93%Plastic sn 73%Sp 59%
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How long does it take to learn?
How long does it take to learn?
Hill AnnEM 97 2h training session
Jansen Ann EM 95, 10 min talk in intro course Accuracy with prior US exp= 80% Accuracy with no prior US exp=65%
Hill AnnEM 97 2h training session
Jansen Ann EM 95, 10 min talk in intro course Accuracy with prior US exp= 80% Accuracy with no prior US exp=65%
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How is US useful?How is US useful?
3 basic aspects: 1. Diagnosis of retained FB 2. Identification of FB location 3. Assistance with removal
Unlike any other modality!
3 basic aspects: 1. Diagnosis of retained FB 2. Identification of FB location 3. Assistance with removal
Unlike any other modality!
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Images of FBImages of FB
Wood Needle Metal
fragment Glass
Wood Needle Metal
fragment Glass
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WoodWood
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WoodWood
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Characteristics- woodCharacteristics- wood
Shadow behind
Echogenic
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NeedleNeedle
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NeedleNeedle
video waterbath_needle long.avi
video waterbath_needle long.avi
QuickTime™ and a decompressor
are needed to see this picture.
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Characteristics- NeedleCharacteristics- Needle
echogenicreverb
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Metal FragmentsMetal Fragments
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Characteristics- MetalCharacteristics- Metal
echogenic
comet tail
echogenic
Slight shadow
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GlassGlass
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Glass 2Glass 2
Image used with permission, Blue Phantom IncImage used with permission, Blue Phantom Inc
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Characteristics- GlassCharacteristics- Glass
++variable ++variable
Acoustic enhancement
echogenic
echogenicreverb
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Other- springOther- spring
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Ok ,so I know it’s thereOk ,so I know it’s there
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How Do I Remove It?How Do I Remove It?
Equipment Settings Static vs dynamic Techniques of removal
Equipment Settings Static vs dynamic Techniques of removal
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EquipmentEquipment
Linear probe Procedure equipment nearby Patient/MD positioning
Linear probe Procedure equipment nearby Patient/MD positioning
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Machine settingsMachine settings
Frequency/ “res” setting Focus
Frequency/ “res” setting Focus
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Dead ZoneDead Zone
3.5MHz 12MHz3.5MHz 12MHz
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StandoffsStandoffs
gelgel
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WaterbathWaterbath
No gel or skin contact required! No gel or skin contact required!
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Waterbath TechniqueWaterbath Technique
Improves sensitivity Gel sn 70% sp90% Waterbath sn 92% sp93%
Improves time of search Gel 22min Waterbath 9min
Improves sensitivity Gel sn 70% sp90% Waterbath sn 92% sp93%
Improves time of search Gel 22min Waterbath 9min
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ComparisonComparison
Gel Waterbath
Gel Waterbath
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Static vs DynamicStatic vs Dynamic
Xmarks the spot Xmarks the spot
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Removal Technique Removal Technique
1. 1 or 2 needles 1. 1 or 2 needles
probe
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Removal TechniqueRemoval Technique
embed: needle movie copy.mov
embed: needle movie copy.mov
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Removal TechniqueRemoval Technique
embed: Fb removal-r needle,
glass1copy.avi
embed: Fb removal-r needle,
glass1copy.avi
QuickTime™ and a decompressor
are needed to see this picture.
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Placement of second needle
Placement of second needle
embed: Fb removal, L needle,
glass2copy.avi
embed: Fb removal, L needle,
glass2copy.avi
QuickTime™ and a decompressor
are needed to see this picture.
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2. Hemostat2. Hemostat
embed: hemostat movie copy.mov
embed: hemostat movie copy.mov
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Embed; fb removal long copy.avi
Embed; fb removal long copy.avi QuickTime™ and a
decompressorare needed to see this picture.
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Embed: fb removal trans forceps
copy.avi
Embed: fb removal trans forceps
copy.avi
QuickTime™ and a decompressor
are needed to see this picture.
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Tips & Tricks- MachineTips & Tricks- Machine
Consider sterile gel Beware the dead zone
High ƒ; alternatives Mark center of probe Sharpie marker
Consider sterile gel Beware the dead zone
High ƒ; alternatives Mark center of probe Sharpie marker
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Tips and Tricks- ID & LocalisationTips and Tricks- ID & Localisation
Move slowly & methodicallySeveral different angles
Air Size matters Neg scan ≠no FB
Move slowly & methodicallySeveral different angles
Air Size matters Neg scan ≠no FB
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PitfallsPitfalls
False Positives Normal anatomy
False Negatives Too small Too fast Too superficial Too much stuff around
False Positives Normal anatomy
False Negatives Too small Too fast Too superficial Too much stuff around
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Tips and Tricks- RemovalTips and Tricks- Removal
Set time limit Remember anatomy 2 needles are better than 1
Set time limit Remember anatomy 2 needles are better than 1
1. 1.
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the fine print…the fine print…Trautlein Trautlein JJ, Lambert RL, Miller J: Malpractice in the emergency department -- Review of 200 JJ, Lambert RL, Miller J: Malpractice in the emergency department -- Review of 200
cases. Ann Emerg Med September 1984 (Part 1); I3: 709-711cases. Ann Emerg Med September 1984 (Part 1); I3: 709-711 Jacobson JA Jacobson JA Wooden foreign bodies in soft tissue: detection at US.Wooden foreign bodies in soft tissue: detection at US.- - RadiologyRadiology - 01-JAN- - 01-JAN-
1998; 206(1): 45-81998; 206(1): 45-8Hill Ultrasound for detection of foreign bodies in human tissue. Ann Emerg Med Mar 97 Hill Ultrasound for detection of foreign bodies in human tissue. Ann Emerg Med Mar 97
28(3)352-35628(3)352-356Bray P Sensitivity and specificity of ultrasound in the diagnosis of foreign bodies in the hand J Bray P Sensitivity and specificity of ultrasound in the diagnosis of foreign bodies in the hand J
Hand Surg (Am) 1990:19:701-703 Hand Surg (Am) 1990:19:701-703 Jansen Learning ultrasound for detection of foreign bodies: How difficult? (abst) Ann Emerg Jansen Learning ultrasound for detection of foreign bodies: How difficult? (abst) Ann Emerg
Med 46(3) Sept 2005 S21Med 46(3) Sept 2005 S21Blaivas, M et al. Water bath evaluation technique for emergency ultrasound of painful superficial Blaivas, M et al. Water bath evaluation technique for emergency ultrasound of painful superficial
structuresstructuresAmerican Journal of Emergency MedicineAmerican Journal of Emergency Medicine - Volume 22, Issue 7 (November - Volume 22, Issue 7 (November 2004)2004)
Raio CC et al. Can emergency ultrasonographers utilise a waterbath to more accurately identify Raio CC et al. Can emergency ultrasonographers utilise a waterbath to more accurately identify superficial soft tissue foreign bodies? (Abst) Ann Emerg Med 46(3) Sept 2005 S28superficial soft tissue foreign bodies? (Abst) Ann Emerg Med 46(3) Sept 2005 S28
Teisen, HG. Sonographische Feinlocalisation von fremdkorpen. Ultraschall1988: 9:135-137-- Teisen, HG. Sonographische Feinlocalisation von fremdkorpen. Ultraschall1988: 9:135-137-- translated in Ma & Mateer, Emergency Ultrasoundtranslated in Ma & Mateer, Emergency Ultrasound
Dewitz A and Frazee B. Dewitz A and Frazee B. Soft Tissue ApplicationsSoft Tissue Applications in Emergency Ultrasound ed MaOJ and Mateer in Emergency Ultrasound ed MaOJ and Mateer J McGraw- Hill 2003.J McGraw- Hill 2003.
Frazee B and White DAE Frazee B and White DAE Soft Tissue UltrasoundSoft Tissue Ultrasound in Practical Guide to Emergency Ultrasound in Practical Guide to Emergency Ultrasound ed CosbyK and Kendall JL Lippincott 2006ed CosbyK and Kendall JL Lippincott 2006
Trautlein Trautlein JJ, Lambert RL, Miller J: Malpractice in the emergency department -- Review of 200 JJ, Lambert RL, Miller J: Malpractice in the emergency department -- Review of 200
cases. Ann Emerg Med September 1984 (Part 1); I3: 709-711cases. Ann Emerg Med September 1984 (Part 1); I3: 709-711 Jacobson JA Jacobson JA Wooden foreign bodies in soft tissue: detection at US.Wooden foreign bodies in soft tissue: detection at US.- - RadiologyRadiology - 01-JAN- - 01-JAN-
1998; 206(1): 45-81998; 206(1): 45-8Hill Ultrasound for detection of foreign bodies in human tissue. Ann Emerg Med Mar 97 Hill Ultrasound for detection of foreign bodies in human tissue. Ann Emerg Med Mar 97
28(3)352-35628(3)352-356Bray P Sensitivity and specificity of ultrasound in the diagnosis of foreign bodies in the hand J Bray P Sensitivity and specificity of ultrasound in the diagnosis of foreign bodies in the hand J
Hand Surg (Am) 1990:19:701-703 Hand Surg (Am) 1990:19:701-703 Jansen Learning ultrasound for detection of foreign bodies: How difficult? (abst) Ann Emerg Jansen Learning ultrasound for detection of foreign bodies: How difficult? (abst) Ann Emerg
Med 46(3) Sept 2005 S21Med 46(3) Sept 2005 S21Blaivas, M et al. Water bath evaluation technique for emergency ultrasound of painful superficial Blaivas, M et al. Water bath evaluation technique for emergency ultrasound of painful superficial
structuresstructuresAmerican Journal of Emergency MedicineAmerican Journal of Emergency Medicine - Volume 22, Issue 7 (November - Volume 22, Issue 7 (November 2004)2004)
Raio CC et al. Can emergency ultrasonographers utilise a waterbath to more accurately identify Raio CC et al. Can emergency ultrasonographers utilise a waterbath to more accurately identify superficial soft tissue foreign bodies? (Abst) Ann Emerg Med 46(3) Sept 2005 S28superficial soft tissue foreign bodies? (Abst) Ann Emerg Med 46(3) Sept 2005 S28
Teisen, HG. Sonographische Feinlocalisation von fremdkorpen. Ultraschall1988: 9:135-137-- Teisen, HG. Sonographische Feinlocalisation von fremdkorpen. Ultraschall1988: 9:135-137-- translated in Ma & Mateer, Emergency Ultrasoundtranslated in Ma & Mateer, Emergency Ultrasound
Dewitz A and Frazee B. Dewitz A and Frazee B. Soft Tissue ApplicationsSoft Tissue Applications in Emergency Ultrasound ed MaOJ and Mateer in Emergency Ultrasound ed MaOJ and Mateer J McGraw- Hill 2003.J McGraw- Hill 2003.
Frazee B and White DAE Frazee B and White DAE Soft Tissue UltrasoundSoft Tissue Ultrasound in Practical Guide to Emergency Ultrasound in Practical Guide to Emergency Ultrasound ed CosbyK and Kendall JL Lippincott 2006ed CosbyK and Kendall JL Lippincott 2006
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Questions or Comments?Questions or Comments?
Email me [email protected]
See you at CAEP Ottawa 08!
Email me [email protected]
See you at CAEP Ottawa 08!
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Please consider this shareware, but would you send me an email stating that you are using any or all of it? It keeps the university happy…
Please consider this shareware, but would you send me an email stating that you are using any or all of it? It keeps the university happy…