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Investigating the Efficacy of Subharmonic Aided Pressure Estimation for Portal Vein Pressures and Portal Hypertension Monitoring

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Title: Investigating the Efficacy of Subharmonic Aided Pressure Estimation for Portal Vein Pressures and Portal Hypertension Monitoring
Authors: Dave, Jaydev K.1,2, Halldorsdottir, Valgerdur G.1,2, Eisenbrey, John R.1, Merton, Daniel A.1, Liu, Ji-Bin1, Zhou, Jian-Hua1, Wang, Hsin-Kai1, Park, Suhyun3, Dianis, Scott3, Chalek, Carl L.3, Lin, Feng3, Thomenius, Kai E.3, Brown, Daniel B.1, Forsberg, Flemming1 flemming.forsberg@jefferson.edu
Source: Ultrasound in Medicine & Biology. Oct2012, Vol. 38 Issue 10, p1784-1798. 15p.
Subjects: Portal vein, Portal hypertension, Microbubbles, Subharmonic functions, Blood pressure measurement, Cuspids, Catheterization
Abstract: Abstract: The efficacy of using subharmonic emissions from Sonazoid microbubbles (GE Healthcare, Oslo, Norway) to track portal vein pressures and pressure changes was investigated in 14 canines using either slow- or high-flow models of portal hypertension (PH). A modified Logiq 9 scanner (GE Healthcare, Milwaukee, WI, USA) operating in subharmonic mode (ftransmit: 2.5 MHz, freceive: 1.25 MHz) was used to collect radiofrequency data at 10–40% incident acoustic power levels with 2–4 transmit cycles (in triplicate) before and after inducing PH. A pressure catheter (Millar Instruments, Inc., Houston, TX, USA) provided reference portal vein pressures. At optimum insonification, subharmonic signal amplitude changes correlated with portal vein pressure changes; r ranged from −0.82 to −0.94 and from −0.70 to −0.73 for PH models considered separately or together, respectively. The subharmonic signal amplitudes correlated with absolute portal vein pressures (r: −0.71 to −0.79). Statistically significant differences between subharmonic amplitudes, before and after inducing PH, were noted (p ≤ 0.01). Portal vein pressures estimated using subharmonic aided pressure estimation did not reveal significant differences (p > 0.05) with respect to the pressures obtained using the Millar pressure catheter. Subharmonic-aided pressure estimation may be useful clinically for portal vein pressure monitoring. [Copyright &y& Elsevier]
Copyright of Ultrasound in Medicine & Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 79807000
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Investigating the Efficacy of Subharmonic Aided Pressure Estimation for Portal Vein Pressures and Portal Hypertension Monitoring
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  Data: <searchLink fieldCode="AR" term="%22Dave%2C+Jaydev+K%2E%22">Dave, Jaydev K.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Halldorsdottir%2C+Valgerdur+G%2E%22">Halldorsdottir, Valgerdur G.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Eisenbrey%2C+John+R%2E%22">Eisenbrey, John R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Merton%2C+Daniel+A%2E%22">Merton, Daniel A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Liu%2C+Ji-Bin%22">Liu, Ji-Bin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Jian-Hua%22">Zhou, Jian-Hua</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Hsin-Kai%22">Wang, Hsin-Kai</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Park%2C+Suhyun%22">Park, Suhyun</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Dianis%2C+Scott%22">Dianis, Scott</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Chalek%2C+Carl+L%2E%22">Chalek, Carl L.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lin%2C+Feng%22">Lin, Feng</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Thomenius%2C+Kai+E%2E%22">Thomenius, Kai E.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Brown%2C+Daniel+B%2E%22">Brown, Daniel B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Forsberg%2C+Flemming%22">Forsberg, Flemming</searchLink><relatesTo>1</relatesTo><i> flemming.forsberg@jefferson.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Ultrasound+in+Medicine+%26+Biology%22">Ultrasound in Medicine & Biology</searchLink>. Oct2012, Vol. 38 Issue 10, p1784-1798. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Portal+vein%22">Portal vein</searchLink><br /><searchLink fieldCode="DE" term="%22Portal+hypertension%22">Portal hypertension</searchLink><br /><searchLink fieldCode="DE" term="%22Microbubbles%22">Microbubbles</searchLink><br /><searchLink fieldCode="DE" term="%22Subharmonic+functions%22">Subharmonic functions</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+pressure+measurement%22">Blood pressure measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Cuspids%22">Cuspids</searchLink><br /><searchLink fieldCode="DE" term="%22Catheterization%22">Catheterization</searchLink>
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  Data: Abstract: The efficacy of using subharmonic emissions from Sonazoid microbubbles (GE Healthcare, Oslo, Norway) to track portal vein pressures and pressure changes was investigated in 14 canines using either slow- or high-flow models of portal hypertension (PH). A modified Logiq 9 scanner (GE Healthcare, Milwaukee, WI, USA) operating in subharmonic mode (ftransmit: 2.5 MHz, freceive: 1.25 MHz) was used to collect radiofrequency data at 10–40% incident acoustic power levels with 2–4 transmit cycles (in triplicate) before and after inducing PH. A pressure catheter (Millar Instruments, Inc., Houston, TX, USA) provided reference portal vein pressures. At optimum insonification, subharmonic signal amplitude changes correlated with portal vein pressure changes; r ranged from −0.82 to −0.94 and from −0.70 to −0.73 for PH models considered separately or together, respectively. The subharmonic signal amplitudes correlated with absolute portal vein pressures (r: −0.71 to −0.79). Statistically significant differences between subharmonic amplitudes, before and after inducing PH, were noted (p ≤ 0.01). Portal vein pressures estimated using subharmonic aided pressure estimation did not reveal significant differences (p > 0.05) with respect to the pressures obtained using the Millar pressure catheter. Subharmonic-aided pressure estimation may be useful clinically for portal vein pressure monitoring. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Ultrasound in Medicine & Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.ultrasmedbio.2012.06.013
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1784
    Subjects:
      – SubjectFull: Portal vein
        Type: general
      – SubjectFull: Portal hypertension
        Type: general
      – SubjectFull: Microbubbles
        Type: general
      – SubjectFull: Subharmonic functions
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      – SubjectFull: Blood pressure measurement
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      – SubjectFull: Cuspids
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      – SubjectFull: Catheterization
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              Text: Oct2012
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