Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent

Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent

OBJECTIVE: To compare two different timings for the performance of the Valsalva maneuver (VM) using an infusion of agitated saline solution with blood as contrast agent (CA) to right-to-left shunt (RLS) screening. METHOD: 42 patients were submitted to a standardized contrast-enhanced transcranial doppler (cTCD) to screen for right-to-left shunt (RLS). cTCD technique was done with two different moments of the VM: [1] the CA injection during the VM (CAduringVM test); [2] the CA injection before the VM (CApreVM test). RESULTS: Positive MCA tests were observed in 47 (56%) CAduringVM tests and in 50 (59.5%) CApreVM tests, p=0.64. There was an almost perfect agreement for the positive tests between the CAduringVM and CApreVM test, r s=0.829 (95% CI 0.61-1.00, p<0.001). CONCLUSION: The present study demonstrates that there is no significant difference in the results of RLS screening by cTCD when two different moments of VM were done.

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Main Authors: Lange,Marcos Christiano, Zétola,Viviane Flumignan, Piovesan,Elcio Juliato, Werneck,Lineu César
Format: Digital revista
Language:English
Published: Academia Brasileira de Neurologia - ABNEURO 2010
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2010000300016
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spelling oai:scielo:S0004-282X20100003000162010-06-24Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agentLange,Marcos ChristianoZétola,Viviane FlumignanPiovesan,Elcio JuliatoWerneck,Lineu César contrast media paradoxical embolism microbubbles transcranial doppler ultrasonography Valsalva maneuver OBJECTIVE: To compare two different timings for the performance of the Valsalva maneuver (VM) using an infusion of agitated saline solution with blood as contrast agent (CA) to right-to-left shunt (RLS) screening. METHOD: 42 patients were submitted to a standardized contrast-enhanced transcranial doppler (cTCD) to screen for right-to-left shunt (RLS). cTCD technique was done with two different moments of the VM: [1] the CA injection during the VM (CAduringVM test); [2] the CA injection before the VM (CApreVM test). RESULTS: Positive MCA tests were observed in 47 (56%) CAduringVM tests and in 50 (59.5%) CApreVM tests, p=0.64. There was an almost perfect agreement for the positive tests between the CAduringVM and CApreVM test, r s=0.829 (95% CI 0.61-1.00, p<0.001). CONCLUSION: The present study demonstrates that there is no significant difference in the results of RLS screening by cTCD when two different moments of VM were done.info:eu-repo/semantics/openAccessAcademia Brasileira de Neurologia - ABNEUROArquivos de Neuro-Psiquiatria v.68 n.3 20102010-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2010000300016en10.1590/S0004-282X2010000300016
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Lange,Marcos Christiano
Zétola,Viviane Flumignan
Piovesan,Elcio Juliato
Werneck,Lineu César
spellingShingle Lange,Marcos Christiano
Zétola,Viviane Flumignan
Piovesan,Elcio Juliato
Werneck,Lineu César
Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
author_facet Lange,Marcos Christiano
Zétola,Viviane Flumignan
Piovesan,Elcio Juliato
Werneck,Lineu César
author_sort Lange,Marcos Christiano
title Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
title_short Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
title_full Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
title_fullStr Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
title_full_unstemmed Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
title_sort valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
description OBJECTIVE: To compare two different timings for the performance of the Valsalva maneuver (VM) using an infusion of agitated saline solution with blood as contrast agent (CA) to right-to-left shunt (RLS) screening. METHOD: 42 patients were submitted to a standardized contrast-enhanced transcranial doppler (cTCD) to screen for right-to-left shunt (RLS). cTCD technique was done with two different moments of the VM: [1] the CA injection during the VM (CAduringVM test); [2] the CA injection before the VM (CApreVM test). RESULTS: Positive MCA tests were observed in 47 (56%) CAduringVM tests and in 50 (59.5%) CApreVM tests, p=0.64. There was an almost perfect agreement for the positive tests between the CAduringVM and CApreVM test, r s=0.829 (95% CI 0.61-1.00, p<0.001). CONCLUSION: The present study demonstrates that there is no significant difference in the results of RLS screening by cTCD when two different moments of VM were done.
publisher Academia Brasileira de Neurologia - ABNEURO
publishDate 2010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2010000300016
work_keys_str_mv AT langemarcoschristiano valsalvamaneuverproceduresinthediagnosisofrighttoleftshuntbycontrastenhancedtranscranialdopplerusingagitatedsalinesolutionwithbloodasacontrastagent
AT zetolavivianeflumignan valsalvamaneuverproceduresinthediagnosisofrighttoleftshuntbycontrastenhancedtranscranialdopplerusingagitatedsalinesolutionwithbloodasacontrastagent
AT piovesanelciojuliato valsalvamaneuverproceduresinthediagnosisofrighttoleftshuntbycontrastenhancedtranscranialdopplerusingagitatedsalinesolutionwithbloodasacontrastagent
AT wernecklineucesar valsalvamaneuverproceduresinthediagnosisofrighttoleftshuntbycontrastenhancedtranscranialdopplerusingagitatedsalinesolutionwithbloodasacontrastagent
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