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Bartnik-Olson BL, Blood AB, Terry MH, Hanson SF, Day C, Kido D, Kim P. Quantitative susceptibility mapping as a measure of cerebral oxygenation in neonatal piglets. J Cereb Blood Flow Metab 2022; 42:891-900. [PMID: 34878947 PMCID: PMC9254037 DOI: 10.1177/0271678x211065199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Prominence of cerebral veins using susceptibility weighted magnetic resonance imaging (SWI) has been used as a qualitative indicator of cerebral venous oxygenation (CvO2). Quantitative susceptibility mapping (QSM) adds more precision to the assessment of CvO2, but has not been applied to neonatal hypoxic ischemic injury (HII). We proposed to study QSM measures of venous susceptibility and their correlation with direct measures of brain oxygenation and cerebral blood flow (CBF) in the neonatal piglet. The association of QSM intravascular cerebral venous susceptibility, with brain tissue O2 tension, CBF, cortical tissue oxyhemoglobin saturation, and the partial pressure of oxygen in arterial blood measurement during various oxygenation states was determined by linear regression. Compared to normoxia, venous susceptibility in the straight sinus increased 56.8 ± 25.4% during hypoxia, while decreasing during hyperoxia (23.5 ± 32.9%) and hypercapnia (23.3 ± 73.1%), which was highly correlated to all other measures of oxygenation (p < 0.0001) but did not correlate to CBF (p = 0.82). These findings demonstrate a strong relationship between venous susceptibility and brain tissue O2 tension. Our results suggest that QSM-derived venous susceptibility is sensitive to cerebral oxygenation status across various oxygenation states.
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Affiliation(s)
| | - Arlin B Blood
- Department of Pediatrics, Loma Linda University School of Medicine, Center for Perinatal Biology, Loma Linda, CA, USA
| | - Michael H Terry
- Department of Pulmonary & Critical Care, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Shawn Fl Hanson
- Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA, USA
| | - Christopher Day
- Department of Pediatrics, Office of Graduate Medical Education, Loma Linda, CA, USA
| | - Daniel Kido
- Department of Radiology, Loma Linda University Medical Center, Loma Linda, CA, USA
| | - Paggie Kim
- Department of Radiology, Loma Linda University Medical Center, Loma Linda, CA, USA
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Knieling F, Cesnjevar R, Regensburger AP, Wagner AL, Purbojo A, Dittrich S, Münch F, Neubert A, Woelfle J, Jüngert J, Rüffer A. Transfontanellar Contrast-enhanced US for Intraoperative Imaging of Cerebral Perfusion during Neonatal Arterial Switch Operation. Radiology 2022; 304:164-173. [PMID: 35380495 DOI: 10.1148/radiol.212044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background Brain injury and subsequent neurodevelopmental disorders are major determinants for later-life outcomes in neonates with transposition of the great arteries (TGA). Purpose To quantitatively assess cerebral perfusion in neonates with TGA undergoing arterial switch operation (ASO) using transfontanellar contrast-enhanced US (T-CEUS). Materials and Methods In a prospective single-center cross-sectional diagnostic study, neonates with TGA scheduled for ASO were recruited from February 2018 to February 2020. Measurements were performed at five time points before, during, and after surgery (T1-T5), and 11 perfusion parameters were derived per cerebral hemisphere. Neonate clinical characteristics, heart rate, mean arterial pressure, central venous pressure, near-infrared spectroscopy, blood gas analyses, ventilation time, time spent in the pediatric intensive care unit, and time in hospital were correlated with imaging parameters. Analysis of variance or a mixed-effects model were used for groupwise comparisons. Results A total of 12 neonates (mean gestational age, 39 6/7 weeks ± 1/7 [SD]) were included and underwent ASO a mean of 6.9 days ± 3.4 after birth. When compared with baseline values, T-CEUS revealed a longer mean time-to-peak (right hemisphere, 4.3 seconds ± 2.1 vs 17 seconds ± 6.4 [P < .001]; left hemisphere, 4.0 seconds ± 2.3 vs 21 seconds ± 8.7 [P < .001]) and rise time (right hemisphere, 3.5 seconds ± 1.7 vs 11 seconds ± 5.1 [P = .002]; left hemisphere, 3.4 seconds ± 2.0 vs 22 seconds ± 7.8 [P = .004]) in both cerebral hemispheres during low-flow cardiopulmonary bypass and hypothermia (T4) for all neonates. Neonate age at surgery negatively correlated with T-CEUS parameters during ASO, as calculated with the area under the flow curve (AUC) during wash-in (R = -0.60, P = .020), washout (R = -0.82, P = .002), and both wash-in and washout (R = -0.79, P = .004). Mean AUC values were lower in neonates older than 7 days compared with younger neonates during wash-in ([87 arbitrary units {au} ± 77] × 102 vs [270 au ± 164] × 102, P = .049]), washout ([15 au ± 11] × 103 vs [65 au ± 38] × 103, P = .020]) and both wash-in and washout ([24 au ± 18] × 103 vs [92 au ± 53] × 103, P = .023). Conclusion Low-flow hypothermic conditions resulted in reduced cerebral perfusion, as measured with transfontanellar contrast-enhanced US, which inversely correlated with age at surgery. Clinical trial registration no. NCT03215628 © RSNA, 2022 Online supplemental material is available for this article.
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Affiliation(s)
- Ferdinand Knieling
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Robert Cesnjevar
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Adrian P Regensburger
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Alexandra L Wagner
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Ariawan Purbojo
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Sven Dittrich
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Frank Münch
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Antje Neubert
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Joachim Woelfle
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - Jörg Jüngert
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
| | - André Rüffer
- From the Departments of Pediatrics and Adolescent Medicine (F.K., A.P.R., A.L.W., A.N., J.W., J.J.), Congenital Heart Surgery (R.C., A.P., F.M.), and Pediatric Cardiology (S.D.), University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loschgestrasse 15, 91054 Erlangen, Germany; and Section for Congenital and Pediatric Cardiac Surgery, University Heart Center Hamburg, University Hospital Hamburg, Eppendorf, Hamburg, Germany (A.R.)
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