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Hughes GC, Chen EP, Browndyke JN, Szeto WY, DiMaio JM, Brinkman WT, Gaca JG, Blumenthal JA, Karhausen JA, Bisanar T, James ML, Yanez D, Li YJ, Mathew JP. Cognitive Effects of Body Temperature During Hypothermic Circulatory Arrest Trial (GOT ICE): A Randomized Clinical Trial Comparing Outcomes After Aortic Arch Surgery. Circulation 2024; 149:658-668. [PMID: 38084590 PMCID: PMC10922813 DOI: 10.1161/circulationaha.123.067022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 11/10/2023] [Indexed: 02/28/2024]
Abstract
BACKGROUND Deep hypothermia has been the standard for hypothermic circulatory arrest (HCA) during aortic arch surgery. However, centers worldwide have shifted toward lesser hypothermia with antegrade cerebral perfusion. This has been supported by retrospective data, but there has yet to be a multicenter, prospective randomized study comparing deep versus moderate hypothermia during HCA. METHODS This was a randomized single-blind trial (GOT ICE [Cognitive Effects of Body Temperature During Hypothermic Circulatory Arrest]) of patients undergoing arch surgery with HCA plus antegrade cerebral perfusion at 4 US referral aortic centers (August 2016-December 2021). Patients were randomized to 1 of 3 hypothermia groups: DP, deep (≤20.0 °C); LM, low-moderate (20.1-24.0 °C); and HM, high-moderate (24.1-28.0 °C). The primary outcome was composite global cognitive change score between baseline and 4 weeks postoperatively. Analysis followed the intention-to-treat principle to evaluate if: (1) LM noninferior to DP on global cognitive change score; (2) DP superior to HM. The secondary outcomes were domain-specific cognitive change scores, neuroimaging findings, quality of life, and adverse events. RESULTS A total of 308 patients consented; 282 met inclusion and were randomized. A total of 273 completed surgery, and 251 completed the 4-week follow-up (DP, 85 [34%]; LM, 80 [34%]; HM, 86 [34%]). Mean global cognitive change score from baseline to 4 weeks in the LM group was noninferior to the DP group; likewise, no significant difference was observed between DP and HM. Noninferiority of LM versus DP, and lack of difference between DP and HM, remained for domain-specific cognitive change scores, except structured verbal memory, with noninferiority of LM versus DP not established and structured verbal memory better preserved in DP versus HM (P = 0.036). There were no significant differences in structural or functional magnetic resonance imaging brain imaging between groups postoperatively. Regardless of temperature, patients who underwent HCA demonstrated significant reductions in cerebral gray matter volume, cortical thickness, and regional brain functional connectivity. Thirty-day in-hospital mortality, major morbidity, and quality of life were not different between groups. CONCLUSIONS This randomized multicenter study evaluating arch surgery HCA temperature strategies found low-moderate hypothermia noninferior to traditional deep hypothermia on global cognitive change 4 weeks after surgery, although in secondary analysis, structured verbal memory was better preserved in the deep group. The verbal memory differences in the low- and high-moderate groups and structural and functional connectivity reductions from baseline merit further investigation and suggest opportunities to further optimize brain perfusion during HCA. REGISTRATION URL: https://www.clinicaltrials.gov; Unique identifier: NCT02834065.
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Affiliation(s)
- G Chad Hughes
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery (G.C.H., E.P.C., J.G.G.), Duke University Medical Center, Durham, NC
| | - Edward P Chen
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery (G.C.H., E.P.C., J.G.G.), Duke University Medical Center, Durham, NC
| | - Jeffrey N Browndyke
- Department of Psychiatry & Behavioral Sciences, Division of Behavioral Medicine & Neurosciences (J.N.B., J.A.B.), Duke University Medical Center, Durham, NC
| | - Wilson Y Szeto
- Department of Surgery, Division of Cardiovascular Surgery, University of Pennsylvania, Philadelphia (W.Y.S.)
| | - J Michael DiMaio
- The Heart Hospital, Baylor Scott and White, Plano, TX (J.M.D., W.T.B.)
| | | | - Jeffrey G Gaca
- Department of Surgery, Division of Thoracic and Cardiovascular Surgery (G.C.H., E.P.C., J.G.G.), Duke University Medical Center, Durham, NC
| | - James A Blumenthal
- Department of Psychiatry & Behavioral Sciences, Division of Behavioral Medicine & Neurosciences (J.N.B., J.A.B.), Duke University Medical Center, Durham, NC
| | - Jorn A Karhausen
- Department of Anesthesiology (J.A.K., T.B., M.L.J., J.P.M.), Duke University School of Medicine, Durham, NC
| | - Tiffany Bisanar
- Department of Anesthesiology (J.A.K., T.B., M.L.J., J.P.M.), Duke University School of Medicine, Durham, NC
| | - Michael L James
- Department of Anesthesiology (J.A.K., T.B., M.L.J., J.P.M.), Duke University School of Medicine, Durham, NC
- Department of Neurology (M.L.J.), Duke University School of Medicine, Durham, NC
| | - David Yanez
- Department of Biostatistics and Bioinformatics (D.Y., Y.-J.L.), Duke University School of Medicine, Durham, NC
| | - Yi-Ju Li
- Department of Biostatistics and Bioinformatics (D.Y., Y.-J.L.), Duke University School of Medicine, Durham, NC
| | - Joseph P Mathew
- Department of Anesthesiology (J.A.K., T.B., M.L.J., J.P.M.), Duke University School of Medicine, Durham, NC
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Muehlschlegel G, Kubicki R, Jacobs-LeVan J, Kroll J, Klemm R, Humburger F, Stiller B, Fleck T. Neurological Impact of Slower Rewarming during Bypass Surgery in Infants. Thorac Cardiovasc Surg 2024; 72:e7-e15. [PMID: 38909608 DOI: 10.1055/s-0044-1787650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/25/2024]
Abstract
BACKGROUND Hypothermia is a neuroprotective strategy during cardiopulmonary bypass. Rewarming entailing a rapid rise in cerebral metabolism might lead to secondary neurological sequelae. In this pilot study, we aimed to validate the hypothesis that a slower rewarming rate would lower the risk of cerebral hypoxia and seizures in infants. METHODS This is a prospective, clinical, single-center study. Infants undergoing cardiac surgery in hypothermia were rewarmed either according to the standard (+1°C in < 5 minutes) or a slow (+1°C in > 5-8 minutes) rewarming strategy. We monitored electrocortical activity via amplitude-integrated electroencephalography (aEEG) and cerebral oxygenation by near-infrared spectroscopy during and after surgery. RESULTS Fifteen children in the standard rewarming group (age: 13 days [5-251]) were cooled down to 26.6°C (17.2-29.8) and compared with 17 children in the slow-rewarming group (age: 9 days [4-365]) with a minimal temperature of 25.7°C (20.1-31.4). All neonates in both groups (n = 19) exhibited suppressed patterns compared with 28% of the infants > 28 days (p < 0.05). During rewarming, only 26% of the children in the slow-rewarming group revealed suppressed aEEG traces (vs. 41%; p = 0.28). Cerebral oxygenation increased by a median of 3.5% in the slow-rewarming group versus 1.5% in the standard group (p = 0.9). Our slow-rewarming group revealed no aEEG evidence of any postoperative seizures (0 vs. 20%). CONCLUSION These results might indicate that a slower rewarming rate after hypothermia causes less suppression of electrocortical activity and higher cerebral oxygenation during rewarming, which may imply a reduced risk of postoperative seizures.
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Affiliation(s)
- Geeske Muehlschlegel
- Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg Bad Krozingen, Bad Krozingen, Baden-Württemberg, Germany
| | - Rouven Kubicki
- Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg Bad Krozingen Freiburg Branch, Freiburg, Freiburg, Germany
| | - Julia Jacobs-LeVan
- Departments of Pediatrics and Clinical Neurosciences, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Johannes Kroll
- Department of Cardiovascular Surgery, University Heart Center Freiburg Bad Krozingen Freiburg Branch, Freiburg, Baden-Württemberg, Germany
| | - Rolf Klemm
- Department of Cardiovascular Surgery, University Heart Center Freiburg Bad Krozingen, Freiburg, Baden-Württemberg, Germany
| | - Frank Humburger
- Department of Anesthesiology, University of Freiburg Medical Center Freiburg, Freiburg, Baden-Württemberg, Germany
| | - Brigitte Stiller
- Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg Bad Krozingen Freiburg Branch, Freiburg, Freiburg, Germany
| | - Thilo Fleck
- Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg Bad Krozingen Freiburg Branch, Freiburg, Freiburg, Germany
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McDevitt WM, Gul T, Jones TJ, Scholefield BR, Seri S, Drury NE. Perioperative electroencephalography in cardiac surgery with hypothermic circulatory arrest: a narrative review. Interact Cardiovasc Thorac Surg 2022; 35:6651844. [PMID: 35904759 PMCID: PMC9462422 DOI: 10.1093/icvts/ivac198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Cardiac surgery with hypothermic circulatory arrest (HCA) is associated with neurological morbidity of variable severity and electroencephalography (EEG) is a sensitive proxy measure of brain injury. We conducted a narrative review of the literature to evaluate the role of perioperative EEG monitoring in cardiac surgery involving HCA. METHODS Medline, Embase, Central and LILACS databases were searched to identify studies utilizing perioperative EEG during surgery with HCA in all age groups, published since 1985 in any language. We aimed to compare EEG use with no use but due to the lack of comparative studies, we performed a narrative review of its utility. Two or more reviewers independently screened studies for eligibility and extracted data. RESULTS Fourty single-centre studies with a total of 3287 patients undergoing surgery were identified. Most were observational cohort studies (34, 85%) with only 1 directly comparing EEG use with no use. EEG continuity (18, 45%), seizures (15, 38%) and electrocerebral inactivity prior to circulatory arrest (15, 38%) were used to detect, monitor, prevent and prognose neurological injury. Neurological dysfunction was reported in almost all studies and occurred in 0–21% of patients. However, the heterogeneity of reported clinical and EEG outcome measures prevented meta-analysis. CONCLUSIONS EEG is used to detect cortical ischaemia and seizures and predict neurological abnormalities and may guide intraoperative cerebral protection. However, there is a lack of comparative data demonstrating the benefit of perioperative EEG monitoring. Use of a standardized methodology for performing EEG and reporting outcome metrics would facilitate the conduct of high-quality clinical trials.
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Affiliation(s)
- William M McDevitt
- Department of Neurophysiology, Birmingham Children’s Hospital , Birmingham, UK
| | - Tanwir Gul
- School of Biomedical Sciences, University of Birmingham , Birmingham, UK
- Department of Paediatric Cardiac Surgery, Birmingham Children’s Hospital , Birmingham, UK
| | - Timothy J Jones
- Department of Paediatric Cardiac Surgery, Birmingham Children’s Hospital , Birmingham, UK
- Institute of Cardiovascular Sciences, University of Birmingham , Birmingham, UK
| | - Barnaby R Scholefield
- Institute of Inflammation and Ageing, University of Birmingham , Birmingham, UK
- Paediatric Intensive Care Unit, Birmingham Children’s Hospital , Birmingham, UK
| | - Stefano Seri
- Department of Neurophysiology, Birmingham Children’s Hospital , Birmingham, UK
- College of Health and Life Sciences, Aston University , Birmingham, UK
| | - Nigel E Drury
- Department of Paediatric Cardiac Surgery, Birmingham Children’s Hospital , Birmingham, UK
- Institute of Cardiovascular Sciences, University of Birmingham , Birmingham, UK
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Higo M, Shimizu Y, Wakabayashi K, Nakano T, Tomino Y, Suzuki Y. Post-Operative Kidney Function Using Deep Hypothermic Circulatory Arrest (DHCA) in Aortic Arch Operation. Int J Nephrol Renovasc Dis 2022; 15:239-252. [PMID: 36189330 PMCID: PMC9524279 DOI: 10.2147/ijnrd.s373828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 09/05/2022] [Indexed: 11/23/2022] Open
Abstract
Background Although deep hypothermic circulatory arrest (DHCA) is a useful option to protect the central nervous system during aortic arch operations, the influence of simultaneous renal ischemia remains controversial. Patients and Methods This is a retrospective observational study. Sixty-three patients who underwent thoracic aortic surgery with DHCA and 24 patients who underwent cardiac surgery without DHCA were included in this study. The mean age, preoperative serum creatinine (Cr) level, preoperative estimated glomerular filtration rate (eGFR), peak serum Cr level up to 48 hrs post-operative, elevation rate of Cr compared to the preoperative serum Cr, urine volume rate up to 48 hrs post-operative and AKI staging using the KDIGO criteria were estimated for each patient. Clinical parameters for 3 months after the operation and the 3-month post-operative mortality rate were assessed. Mean values indicating kidney function or distribution of the AKI stages were compared between patients with and without DHCA. Patients with DHCA were further divided according to the duration of ischemia to compare the values for the kidney function of each group, distribution of AKI stages and mortality. Results The parameters indicating AKI of the patients with DHCA were significantly more severe than those without DHCA. Patients who had undergone an ischemic state for more than 40 min revealed significantly higher peak serum Cr, elevation rate of serum Cr, less urine volume up to 48 hrs post-operative compared with those without DHCA. Distribution of the AKI stages was related to the duration of ischemia. The 3-month post-operative mortality of the patients with DHCA was significantly higher than those without DHCA. Limitations This study had limitations such as its retrospective design and small number patients, and the data will be required confirmation with other prospective studies. Conclusion DHCA is closely related to AKI up to 48 hrs post-operative and death during the 3 months following surgery.
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Affiliation(s)
- Masahide Higo
- Department of Clinical Engineering, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - Yoshio Shimizu
- Division of Nephrology, Department of Internal Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
- Shizuoka Medical Research Center for Disaster, Juntendo University, Izunokuni, Shizuoka, Japan
- Correspondence: Yoshio Shimizu, Division of Nephrology, Department of Internal Medicine, Juntendo University Shizuoka Hospital, 1129 Nagaoka, Izunokuni-shi, Shizuoka, 410-2211, Japan, Tel +81-55-948-3111, Fax +81-55-946-0858, Email
| | - Keiichi Wakabayashi
- Division of Nephrology, Department of Internal Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - Takehiko Nakano
- Department of Clinical Engineering, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - Yasuhiko Tomino
- Asian Pacific Renal Research Promotion Office, Medical Corporation SHOWAKAI, Shinjuku-ku, Tokyo, Japan
| | - Yusuke Suzuki
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
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Augoustides JG. Protecting the Central Nervous System During Cardiac Surgery. Perioper Med (Lond) 2022. [DOI: 10.1016/b978-0-323-56724-4.00022-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Vekstein AM, Yerokun BA, Jawitz OK, Doberne JW, Anand J, Karhausen J, Ranney DN, Benrashid E, Wang H, Keenan JE, Schroder JN, Gaca JG, Hughes GC. Does deeper hypothermia reduce the risk of acute kidney injury after circulatory arrest for aortic arch surgery? Eur J Cardiothorac Surg 2021; 60:314-321. [PMID: 33624004 DOI: 10.1093/ejcts/ezab044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 12/18/2020] [Accepted: 12/29/2020] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES The impact of hypothermic circulatory arrest (HCA) temperature on postoperative acute kidney injury (AKI) has not been evaluated. This study examined the association between circulatory arrest temperatures and AKI in patients undergoing proximal aortic surgery with HCA. METHODS A total of 759 consecutive patients who underwent proximal aortic surgery (ascending ± valve ± root) including arch replacement requiring HCA between July 2005 and December 2016 were identified from a prospectively maintained institutional aortic surgery database. The primary outcome was AKI as defined by Risk, Injury, Failure, Loss, End Stage Renal Disease (ESRD) criteria. The association between minimum nasopharyngeal (NP) and bladder temperatures during HCA and postoperative AKI was assessed, adjusting for patient-level factors using multivariable logistic regression. RESULTS A total of 85% (n = 645) of patients underwent deep hypothermia (14.1-20.0°C), 11% (n = 83) low-moderate hypothermia (20.1-24.0°C) and 4% (n = 31) high-moderate hypothermia (24.1-28.0°C) as classified by NP temperature. When analysed by bladder temperature, 59% (n = 447) underwent deep hypothermia, 22% (n = 170) low-moderate, 16% (n = 118) high-moderate and 3% mild (n = 24) (28.1-34.0°C) hypothermia. The median systemic circulatory arrest time was 17 min. The incidence of AKI did not differ between hypothermia groups, whether analysed using minimum NP or bladder temperature. In the multivariable analysis, the association between degree of hypothermia and AKI remained non-significant whether analysed as a categorical variable (hypothermia group) or as a continuous variable (minimum NP or bladder temperature) (all P > 0.05). CONCLUSIONS In patients undergoing proximal aortic surgery including arch replacement requiring HCA, degree of systemic hypothermia was not associated with the risk of AKI. These data suggest that moderate hypothermia does not confer increased risk of AKI for patients requiring circulatory arrest, although additional prospective data are needed.
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Affiliation(s)
- Andrew M Vekstein
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Babtunde A Yerokun
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Oliver K Jawitz
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Julie W Doberne
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jatin Anand
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jorn Karhausen
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - David N Ranney
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Ehsan Benrashid
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Hanghang Wang
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jeffrey E Keenan
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jacob N Schroder
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - Jeffrey G Gaca
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
| | - G Chad Hughes
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC, USA
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Alkhatip AAAMM, Kamel MG, Farag EM, Elayashy M, Farag A, Yassin HM, Bahr MH, Abdelhaq M, Sallam A, Kamal AM, Emady MFE, Wagih M, Naguib AA, Helmy M, Algameel HZ, Abdelkader M, Mohamed H, Younis M, Purcell A, Elramely M, Hamza MK. Deep Hypothermic Circulatory Arrest in the Pediatric Population Undergoing Cardiac Surgery With Electroencephalography Monitoring: A Systematic Review and Meta-Analysis. J Cardiothorac Vasc Anesth 2021; 35:2875-2888. [PMID: 33637420 DOI: 10.1053/j.jvca.2021.01.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 01/15/2021] [Accepted: 01/19/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Cardiac surgery for repair of congenital heart defects poses unique hazards to the developing brain. Deep hypothermic circulatory arrest (DHCA) is a simple and effective method for facilitating a bloodless surgical field during congenital heart defect repair. There are, however, some concerns that prolonged DHCA increases the risk of nervous system injury. The electroencephalogram (EEG) is used in adult and, to a lesser extent, pediatric cardiac procedures as a neuromonitoring method. The present study was performed to assess outcomes following DHCA with EEG monitoring in the pediatric population. DESIGN In this systematic review and meta-analysis, the PubMed, Cochrane Central Register of Controlled Trials, Scopus, Institute of Science Index, and Embase databases were searched from inception for relevant articles. A fixed- or random-effects model, as appropriate, was used. SETTING Surgical setting. PARTICIPANTS Pediatric population (≤18 y old). INTERVENTIONS DHCA (18°C) with EEG monitoring. MEASUREMENTS AND MAIN RESULTS Nineteen articles with 1,267 pediatric patients ≤18 years were included. The event rate of clinical and EEG seizures among patients who underwent DHCA was 12.9% and 14.9%, respectively. Mortality was found to have a 6.3% prevalence. A longer duration of DHCA was associated with a higher risk of EEG seizure and neurologic abnormalities. In addition, seizures were associated with increased neurologic abnormalities and neurodevelopmental delay. CONCLUSIONS EEG and neurologic abnormalities were common after DHCA. A longer duration of DHCA was found to lead to more EEG seizure and neurologic abnormalities. Moreover, EEG seizures were more common than clinical seizures. Seizures were found to be associated with increased neurologic abnormalities and neurodevelopmental delay.
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Affiliation(s)
- Ahmed Abdelaal Ahmed Mahmoud M Alkhatip
- Department of Anaesthesia, Birmingham Children's Hospital, Birmingham, UK; Department of Anaesthesia, Beni-Suef University Hospital and Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
| | | | - Ehab Mohamed Farag
- Department of Anaesthesia, Beni-Suef University Hospital and Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Mohamed Elayashy
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Ahmed Farag
- Department of Anesthesia, King Abdullah Medical City - Holy Capital, Makkah, Saudi Arabia
| | - Hany Mahmoud Yassin
- Department of Anesthesia, Faculty of Medicine, Fayoum University, Fayoum, Egypt
| | - Mahmoud Hussein Bahr
- Department of Anaesthesia, Beni-Suef University Hospital and Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Mohamed Abdelhaq
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Amr Sallam
- Department of Anaesthesia, Beaumont Hospital, Dublin, Ireland; Department of Anaesthesia, Faculty of Medicine, Ain-Shams University, Cairo, Egypt
| | - Ahmed Mostafa Kamal
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | | | - Mohamed Wagih
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Amr Ahmed Naguib
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Mohamed Helmy
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt
| | | | - Mohamed Abdelkader
- Department of Anaesthesia, Beni-Suef University Hospital and Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Hassan Mohamed
- Department of Anaesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt; Department of Anaesthesia, Royal Papworth Hospital, Cambridge, UK
| | - Mohamed Younis
- Department of Anaesthesia, Cambridge University Hospital, Cambridge, UK
| | - Andrew Purcell
- Department of Anaesthesia, Beaumont Hospital, Dublin, Ireland
| | - Mohamed Elramely
- Department of Anaesthesia, National Cancer Institute, Cairo University, Cairo, Egypt
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Ma O, Crepeau AZ, Dutta A, Bliss DW. Anticipating Postoperative Delirium During Burst Suppression Using Electroencephalography. IEEE Trans Biomed Eng 2020; 67:2659-2668. [PMID: 32031924 DOI: 10.1109/tbme.2020.2967693] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE This study develops an electro-encephalography-based method for predicting postoperative delirium early during cardiac surgeries involving deep hypothermia circulatory arrest (DHCA), potentially providing an opportunity to intervene and minimize poor surgical outcome. DHCA is a surgical technique used during cardiac surgeries to facilitate repairs. Deep hypothermia is induced and supplemented by perfusion techniques to protect the brain during circulatory arrest, but concern for cerebral injury still remains. METHODS This research studies whether or not monitoring burst suppression, an electrophysiological phenomenon observed during patient cooling and warming, helps in predicting postoperative delirium, a correlate of poor prognosis. A metric called the burst suppression duty cycle (BSDC), akin to burst suppression ratio, is formulated to characterize this electrophysiological activity. RESULTS Assuming no complications occur prior to circulatory arrest, delirium diagnoses are correlated with the time elapsed until suppression activity ceases since resuming cardiopulmonary bypass. By comparing against a benchmark the times when BSDC reaches 100%, 15 of 16 cases can be correctly predicted. Similar accuracy can be achieved when querying BSDC progress earlier during warming. CONCLUSION Our results show that our BSDC metric is a promising candidate for early detection of postoperative delirium, and motivates further analysis of the causal relationship between postoperative delirium and the procedure transitioning out of circulatory arrest. SIGNIFICANCE The developed methodology anticipates incidences of postoperative delirium during rewarming, which potentially provides an opportunity to intervene and avert it.
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Hypothermia during Surgical Treatment of Type A Aortic Dissection: A 16 Years' Experience. Int J Vasc Med 2020; 2020:3893261. [PMID: 34367694 PMCID: PMC8339990 DOI: 10.1155/2020/3893261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 09/02/2019] [Accepted: 10/15/2019] [Indexed: 11/25/2022] Open
Abstract
Acute aortic dissection (AAD) is among the most challenging cases for surgical treatment and requires procedural expertise for its safe conduct. Aortic surgery has undergone several changes over the last years, especially concerning cerebral protection. The brilliant results obtained with the aid of selective anterograde cerebral perfusion led to a progressive increase of circulatory arrest temperature, with the rise of safe time along with a reduction of the extracorporeal circulation time and hypothermia-related side effects. However, there is still no definitive consensus concerning the optimal range of temperature to be used during circulatory arrest. Objectives. This is a retrospective observational study, and we examined 16-year trends in the presentation, diagnosis, hospital outcome and treatment of A AAD type. In our Cardiac Surgery Unit in Policlinico Umberto I of Rome, our analysis focused on patients, who received ACP during aortic surgery and we analyzed the differences between two distinct groups based on the lowest temperature reached during CPB conduction: Lower Temperature Group (LT) (T < 24°C) versus Higher Temperature Group (HT) (T ≥ 24°C) arrest circulation temperature. Methods. Data from 241 patients enrolled between August 2002 and March 2018 were analyzed. Patients were divided according to the lowest temperature reached into 2 groups: Lower Temperature group (LT) (94 patients) and Higher Temperature Group (HT) (147 patients). Results. Our results showed a significant reduction of in-hospital mortality and in-hospital results in patients with higher CPB temperature. The global incidence of complications was statistically reduced in HT group: we found a statistical significant reduction of intestinal ischemia, and a similar trend also for other complications analyzed, such as infections. Since the two groups were similar for type of surgical procedures, we considered these differences depending on the lower temperature value reached, according to the current literature. Conclusions. We found a significantly higher mortality in patients with lower temperature during CPB and a global reduction of complications and in particular a significant reduction of intestinal ischemia in patients with higher temperature during CPB. We found a similar trend in other fields of investigations, so we can conclude that circulatory arrest performed at temperature ≥24°C nasopharyngeal temperature associated with ACP is a safe strategy for aortic surgery for AAD.
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Haunschild J, Borger MA, Etz CD. Zerebrale Protektionsstrategien und Monitoring im hypothermen Kreislaufstillstand. ZEITSCHRIFT FUR HERZ THORAX UND GEFASSCHIRURGIE 2019. [DOI: 10.1007/s00398-019-00340-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wagner MA, Wang H, Benrashid E, Keenan JE, Ganapathi AM, Englum BR, Hughes GC. Risk Prediction Model for Major Adverse Outcome in Proximal Thoracic Aortic Surgery. Ann Thorac Surg 2019; 107:795-801. [DOI: 10.1016/j.athoracsur.2018.09.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 08/01/2018] [Accepted: 09/17/2018] [Indexed: 11/30/2022]
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Yoshitani K, Kawaguchi M, Ishida K, Maekawa K, Miyawaki H, Tanaka S, Uchino H, Kakinohana M, Koide Y, Yokota M, Okamoto H, Nomura M. Guidelines for the use of cerebral oximetry by near-infrared spectroscopy in cardiovascular anesthesia: a report by the cerebrospinal Division of the Academic Committee of the Japanese Society of Cardiovascular Anesthesiologists (JSCVA). J Anesth 2019; 33:167-196. [DOI: 10.1007/s00540-019-02610-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/02/2019] [Indexed: 11/29/2022]
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Ranney DN, Yerokun BA, Benrashid E, Bishawi M, Williams A, McCann RL, Hughes GC. Outcomes of Planned Two-Stage Hybrid Aortic Repair With Dacron-Replaced Proximal Landing Zone. Ann Thorac Surg 2018; 106:1136-1142. [DOI: 10.1016/j.athoracsur.2018.04.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 03/12/2018] [Accepted: 04/16/2018] [Indexed: 10/28/2022]
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Electroencephalographic Response to Deep Hypothermic Circulatory Arrest in Neonatal Swine and Humans. Ann Thorac Surg 2018; 106:1841-1846. [PMID: 30071237 DOI: 10.1016/j.athoracsur.2018.06.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/14/2018] [Accepted: 06/15/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND Piglets are used to study neurologic effects of deep hypothermic circulatory arrest (DHCA), but no studies have compared human and swine electroencephalogram (EEG) responses to DHCA. The importance of isoelectricity before circulatory arrest is not fully known in neonates. We compared the EEG response to DHCA in human neonates and piglets. METHODS We recorded 2 channel, left and right centroparietal, subdermal EEG in 10 neonatal patients undergoing operations involving DHCA and 10 neonatal piglets that were placed on cardiopulmonary bypass and underwent a simulated procedure using DHCA. EEG waveforms were analyzed for the presence and extent of burst suppression and isoelectricity by automated moving window analysis. The patients were monitored with 16-channel array EEG for 48 hours postoperatively and underwent postoperative brain magnetic resonance imaging. RESULTS After induction of anesthesia, humans and piglets both displayed slowing or brief suppression, then mild burst suppression, and then severe burst suppression during cooling. All piglets subsequently achieved isoelectricity at 22.4° ± 6.9°C, whereas only 1 human did at 20.2°C. Piglets and humans emerged from severe, mild, and then brief suppression patterns during rewarming. Among the patients, there were no seizures during postoperative monitoring and 1 instance of increased white matter injury on postoperative magnetic resonance imaging. CONCLUSIONS Our data suggest that current cooling strategies may not be sufficient to eliminate all EEG activity before circulatory arrest in humans but are sufficient in swine. This important difference between the swine and human response to DHCA should be considered when using this model.
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Manetta F, Mullan CW, Catalano MA. Neuroprotective Strategies in Repair and Replacement of the Aortic Arch. Int J Angiol 2018; 27:98-109. [PMID: 29896042 PMCID: PMC5995688 DOI: 10.1055/s-0038-1649512] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Aortic arch surgery is a technical challenge, and cerebral protection during distal anastomosis is a continued topic of controversy and discussion. The physiologic effects of hypothermic arrest and adjunctive cerebral perfusion have yet to be fully defined, and the optimal strategies are still undetermined. This review highlights the historical context, physiological rationale, and clinical efficacy of various neuroprotective strategies during arch operations.
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Affiliation(s)
- Frank Manetta
- Department of Cardiovascular and Thoracic Surgery, Barbara and Donald Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
| | - Clancy W. Mullan
- Department of Cardiovascular and Thoracic Surgery, Barbara and Donald Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
| | - Michael A. Catalano
- Department of Cardiovascular and Thoracic Surgery, Barbara and Donald Zucker School of Medicine at Hofstra/Northwell, Manhasset, New York
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Bergeron EJ, Mosca MS, Aftab M, Justison G, Reece TB. Neuroprotection Strategies in Aortic Surgery. Cardiol Clin 2017; 35:453-465. [DOI: 10.1016/j.ccl.2017.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Fernández Suárez FE, Fernández Del Valle D, González Alvarez A, Pérez-Lozano B. Intraoperative care for aortic surgery using circulatory arrest. J Thorac Dis 2017; 9:S508-S520. [PMID: 28616347 PMCID: PMC5462730 DOI: 10.21037/jtd.2017.04.67] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 04/06/2017] [Indexed: 11/06/2022]
Abstract
The total circulatory arrest (CA) is necessary to achieve optimal surgical conditions in certain aortic pathologies, especially in those affecting the ascending aorta and aortic arch. During this procedure it is necessary to protect all the organs of ischemia, especially those of the central nervous system and for this purpose several strategies have been developed. The first and most important protective method is systemic hypothermia. The degree of hypothermia and the route of application have been evolving and currently tend to use moderate hypothermia (MH) (20.1-28 °C) associated with unilateral or bilateral selective cerebral perfusion methods. In this way the neurological results are better, the interval of security is greater and the times of extracorporeal circulation are smaller. Even so, it is necessary to take into account that there is the possibility of ischemia in the lower part of the body, especially of the abdominal viscera and the spinal cord, therefore the time of circulatory stop should be limited and not to exceed 80 minutes. Evidence of possible neurological drug protection is very weak and only mannitol, magnesium, and statins can produce some benefit. Inhalational anesthetics and some intravenous seem to have advantages, but more studies would be needed to test their long-term benefit. Other important parameters to be monitored during these procedures are blood glucose, anemia and coagulation disorders and acid-base balance. The recommended monitoring is common in complex cardiovascular procedures and it is of special importance the neurological monitoring that can be performed with several techniques, although currently the most used are Bispectral Index (BIS) and Near-Infrared Spectroscopy (NIRS). It is also essential to monitor the temperature routinely at the nasopharyngeal and bladder level and it is important to control coagulation with rotational thromboelastometry (ROTEM).
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Affiliation(s)
| | | | - Adrián González Alvarez
- Department of Anesthesiology, Central University Hospital of Asturias, Oviedo, Asturias, Spain
| | - Blanca Pérez-Lozano
- Department of Anesthesiology, Central University Hospital of Asturias, Oviedo, Asturias, Spain
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Reed H, Berg KB, Janelle GM. Aortic Surgery and Deep-Hypothermic Circulatory Arrest: Anesthetic Update. Semin Cardiothorac Vasc Anesth 2017; 18:137-45. [PMID: 24876229 DOI: 10.1177/1089253214525278] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aortic arch surgery has become increasingly complex, and novel surgical approaches have been utilized. Efforts aimed at improving neurological outcomes in this patient population have been numerous, with varying degrees of success. This article summarizes the anesthetic considerations for procedures on the aortic arch, including evidence-based outcomes with respect to temperature management, perfusion strategies, hemodynamic goals, adjunct agents, and neuromonitoring.
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Patient management in aortic arch surgery†. Eur J Cardiothorac Surg 2017; 51:i4-i14. [DOI: 10.1093/ejcts/ezw337] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 08/23/2016] [Accepted: 09/02/2016] [Indexed: 12/31/2022] Open
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Keenan JE, Benrashid E, Kale E, Nicoara A, Husain AM, Hughes GC. Neurophysiological Intraoperative Monitoring During Aortic Arch Surgery. Semin Cardiothorac Vasc Anesth 2016; 20:273-282. [PMID: 27708177 DOI: 10.1177/1089253216672441] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Circulatory management during replacement of the aortic arch is complex and involves a period of circulatory arrest to provide a bloodless field during arch vessel anastomosis. To guard against ischemic brain injury, tissue metabolic demand is reduced by systemically cooling the patient prior to circulatory arrest. Neurophysiological intraoperative monitoring (NIOM) is often used during the course of these procedures to provide contemporaneous assessment of brain status to help direct circulatory management decisions and detect brain ischemia. In this review, we discuss the characteristics of electrocerebral activity through the process of cooling, circulatory arrest, and rewarming as depicted through commonly used NIOM modalities, including electroencephalography and peripheral nerve somatosensory-evoked potentials. Attention is directed toward the role NIOM has traditionally played during deep hypothermic circulatory arrest, where it is used to define the point of electrocerebral inactivity or maximal cerebral metabolic suppression prior to initiating circulatory arrest while also discussing the evolving utility of NIOM when systemic circulatory arrest is initiated at more moderate degrees of hypothermia in conjunction with regional brain perfusion. The use of cerebral tissue oximetry by near-infrared spectroscopy as an alternative NIOM modality during surgery of the aortic arch is addressed as well. Finally, special considerations for NIOM and the detection of spinal cord ischemia during hybrid aortic arch repair and emerging operative techniques are also discussed.
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Affiliation(s)
- Jeffrey E Keenan
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Ehsan Benrashid
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC, USA
| | - Emily Kale
- Department of Neurology, Duke University Medical Center, Durham, NC, USA
| | - Alina Nicoara
- Department of Anesthesiology, Duke University Medical Center, Durham, NC, USA
| | - Aatif M Husain
- Department of Neurology, Duke University Medical Center, Durham, NC, USA
| | - G Chad Hughes
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC, USA
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Does moderate hypothermia really carry less bleeding risk than deep hypothermia for circulatory arrest? A propensity-matched comparison in hemiarch replacement. J Thorac Cardiovasc Surg 2016; 152:1559-1569.e2. [PMID: 27692949 DOI: 10.1016/j.jtcvs.2016.08.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/27/2016] [Accepted: 08/11/2016] [Indexed: 01/12/2023]
Abstract
BACKGROUND Moderate (MHCA) versus deep (DHCA) hypothermia for circulatory arrest in aortic arch surgery has been purported to reduce coagulopathy and bleeding complications, although there are limited data supporting this claim. This study aimed to compare bleeding-related events after aortic hemiarch replacement with MHCA versus DHCA. METHODS Patients who underwent hemiarch replacement at a single institution from July 2005 to August 2014 were stratified into DHCA and MHCA groups (minimum systemic temperature ≤20°C and >20°C, respectively) and compared. Then, 1:1 propensity matching was performed to adjust for baseline differences. RESULTS During the study period, 571 patients underwent hemiarch replacement: 401 (70.2%) with DHCA and 170 (29.8%) with MHCA. After propensity matching, 155 patients remained in each group. There were no significant differences between matched groups with regard to the proportion transfused with red blood cells, plasma, platelet concentrates, or cryoprecipitate on the operative day, the rate of reoperation for bleeding, or postoperative hematologic laboratory values. Among patients who received plasma, the median transfusion volume was statistically greater in the DHCA group (6 vs 5 units, P = .01). MHCA also resulted in a slight reduction in median volume of blood returned via cell saver (500 vs 472 mL, P < .01) and 12-hour postoperative chest tube output (440 vs 350, P < .01). Thirty-day mortality and morbidity did not differ significantly between groups. CONCLUSIONS MHCA compared with DHCA during hermiarch replacement may slightly reduce perioperative blood-loss and plasma transfusion requirement, although these differences do not translate into reduced reoperation for bleeding or postoperative mortality and morbidity.
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Andersen ND, Benrashid E, Ross AK, Pickett LC, Smith PK, Daneshmand MA, Schroder JN, Gaca JG, Hughes GC. The utility of the aortic dissection team: outcomes and insights after a decade of experience. Ann Cardiothorac Surg 2016; 5:194-201. [PMID: 27386406 DOI: 10.21037/acs.2016.05.12] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Mortality rates following acute type A aortic dissection (ATAAD) repair are reduced when operations are performed by a high-volume acute aortic dissection (AAD) team, leading to efforts to centralize ATAAD care. Here, we describe our experience with ATAAD repair by our AAD team over the last 10 years, with a focus on patient selection, transfer protocols, operative approach, and volume trends over time. METHODS An AAD team was implemented at our institution in 2005, with dedicated high-volume AAD surgeons, a multidisciplinary approach to thoracic aortic disease management, and a standardized protocol for ATAAD repair. Further process improvements were made in 2013 to facilitate the rapid transfer of ATAAD patients to our institution using stream-lined triage, diagnostic, and transfer protocols for patients with suspected ATAAD (RACE-AD protocol). Volume trends and outcomes were assessed longitudinally over this period. RESULTS Institutional ATAAD repair volume remained constant at 12±2 cases per year from 2005-2013, but increased nearly two-fold to 22±6 cases per year (P=0.004) from 2013-2015 following implementation of the RACE-AD protocol. To accommodate this increased volume, two additional surgeons were added to the AAD team. Surgeon ATAAD repair volume was unchanged over the 10-year interval (7.9±3.9 cases per year from 2005-2013 versus 5.5±1.5 cases per year from 2013-2015; P=0.36), and all AAD team surgeons consistently met or exceeded the high-volume surgeon threshold of 5 ATAAD repairs per year. Thirty-day/in-hospital mortality rates of less than 10% were maintained over the study period. CONCLUSIONS Centralization of ATAAD care has begun to occur at our center, with maintenance of low mortality rates for ATAAD repair. These data confirm a net positive impact on regional ATAAD outcomes through transfer of patients to a high-volume center with dedicated AAD surgeons.
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Affiliation(s)
- Nicholas D Andersen
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Ehsan Benrashid
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Adia K Ross
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Lisa C Pickett
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Peter K Smith
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Mani A Daneshmand
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Jacob N Schroder
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Jeffrey G Gaca
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - G Chad Hughes
- 1 Department of Surgery, 2 Department of Medicine, Duke University Medical Center, Durham, NC, USA
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Hanna JM, Keenan JE, Wang H, Andersen ND, Gaca JG, Lombard FW, Welsby IJ, Hughes GC. Use of human fibrinogen concentrate during proximal aortic reconstruction with deep hypothermic circulatory arrest. J Thorac Cardiovasc Surg 2016; 151:376-82. [PMID: 26428473 PMCID: PMC5429587 DOI: 10.1016/j.jtcvs.2015.08.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 08/11/2015] [Accepted: 08/23/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Human fibrinogen concentrate (HFC) is approved by the Food and Drug Administration for use at 70 mg/kg to treat congenital afibrinogenemia. We sought to determine whether this dose of HFC increases fibrinogen levels in the setting of high-risk bleeding associated with aortic reconstruction and deep hypothermic circulatory arrest (DHCA). METHODS This was a prospective, pilot, off-label study in which 22 patients undergoing elective proximal aortic reconstruction with DHCA were administered 70 mg/kg HFC upon separation from cardiopulmonary bypass (CPB). Fibrinogen levels were measured at baseline, just before, and 10 minutes after HFC administration, on skin closure, and the day after surgery. The primary study outcome was the difference in fibrinogen level immediately after separation from CPB, when HFC was administered, and the fibrinogen level 10 minutes following HFC administration. Additionally, postoperative thromboembolic events were assessed as a safety analysis. RESULTS The mean baseline fibrinogen level was 317 ± 49 mg/dL and fell to 235 ± 39 mg/dL just before separation from CPB. After HFC administration, the fibrinogen level rose to 331 ± 41 mg/dL (P < .001) and averaged 372 ± 45 mg/dL the next day. No postoperative thromboembolic complications occurred. CONCLUSIONS Administration of 70 mg/kg HFC upon separation from CPB raises fibrinogen levels by approximately 100 mg/dL without an apparent increase in thrombotic complications during proximal aortic reconstruction with DHCA. Further prospective study in a larger cohort of patients will be needed to definitively determine the safety and evaluate the efficacy of HFC as a hemostatic adjunct during these procedures.
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Affiliation(s)
- Jennifer M Hanna
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Jeffrey E Keenan
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Hanghang Wang
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Nicholas D Andersen
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Jeffrey G Gaca
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Frederick W Lombard
- Division of Cardiac Anesthesiology, Department of Anesthesiology, Duke University Medical Center, Durham, NC
| | - Ian J Welsby
- Division of Cardiac Anesthesiology, Department of Anesthesiology, Duke University Medical Center, Durham, NC.
| | - G Chad Hughes
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
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Ghadimi K, Gutsche JT, Setegne SL, Jackson KR, Augoustides JG, Ochroch EA, Bavaria JE, Cheung AT. Severity and Duration of Metabolic Acidosis After Deep Hypothermic Circulatory Arrest for Thoracic Aortic Surgery. J Cardiothorac Vasc Anesth 2015; 29:1432-40. [DOI: 10.1053/j.jvca.2015.07.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 01/05/2023]
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Schechter MA, Shah AA, Englum BR, Williams JB, Ganapathi AM, Davies JD, Welsby IJ, Hughes GC. Prolonged postoperative respiratory support after proximal thoracic aortic surgery: Is deep hypothermic circulatory arrest a risk factor? J Crit Care 2015; 31:125-9. [PMID: 26700606 DOI: 10.1016/j.jcrc.2015.10.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 10/27/2015] [Indexed: 01/17/2023]
Abstract
PURPOSE In addition to the pulmonary risks associated with cardiopulmonary bypass, thoracic aortic surgery using deep hypothermic circulatory arrest (DHCA) may subject the lungs to further injury. However, this topic has received little investigation to date. MATERIALS AND METHODS A prospective cohort review was performed on all patients undergoing proximal thoracic aortic surgery with (n = 478) and without (n = 135) DHCA between July 2005 and February 2013 at a single institution. The primary outcome was prolonged postoperative respiratory support (PPRS), defined as any of the following: >1 day of mechanical ventilation at either fraction of inspired oxygen >0.4 and/or positive end-expiratory pressure >5 mm Hg, >2 days of supplemental O2 requirement of at least 2.5 L/min, or discharge with new O2 requirement. Independent risk factors for PPRS were identified using multivariable logistic regression. RESULTS Postoperative respiratory support was required in 100 patients (20.9%) with and 30 patients (22.2%) without DHCA (P = .74). Independent predictors of PPRS after proximal aortic surgery included the following: age, diabetes, history of stroke, preoperative creatinine, American Society of Anesthesiologists class 4, redo-sternotomy, total arch replacement, and transfusion requirement. Use of DHCA was not an independent risk factor for PPRS in the entire cohort. Subanalysis of only DHCA patients revealed that longer DHCA times were independently associated with PPRS. CONCLUSIONS Prolonged postoperative respiratory support is common after proximal aortic surgery. The use of DHCA was not associated with this complication in the overall cohort, although longer DHCA times were predictive when only the subset of patients undergoing DHCA was analyzed. Knowledge of the risk factors for PPRS after proximal aortic surgery should improve preoperative risk stratification and postoperative management of these patients.
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Affiliation(s)
| | - Asad A Shah
- Department of Surgery, Duke University Medical Center, Durham, NC
| | - Brian R Englum
- Department of Surgery, Duke University Medical Center, Durham, NC
| | | | | | - John D Davies
- Department of Respiratory Services, Duke University Medical Center, Durham, NC
| | - Ian J Welsby
- Department of Anesthesia, Duke University Medical Center, Durham, NC
| | - G Chad Hughes
- Department of Surgery, Duke University Medical Center, Durham, NC.
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Electroencephalography During Hemiarch Replacement With Moderate Hypothermic Circulatory Arrest. Ann Thorac Surg 2015; 101:631-7. [PMID: 26482779 DOI: 10.1016/j.athoracsur.2015.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 07/28/2015] [Accepted: 08/07/2015] [Indexed: 11/23/2022]
Abstract
BACKGROUND This study aimed to characterize intraoperative electroencephalography (EEG) during moderate hypothermic circulatory arrest (MHCA) with selective antegrade cerebral perfusion (SACP), which has not been described previously. METHODS This was a single-institution retrospective study of patients undergoing aortic hemiarch replacement using MHCA (temperatures <28°C at circulatory arrest [CA]) and unilateral SACP with EEG monitoring from July 1, 2013 to November 1, 2014. The EEG pattern was determined before and immediately after CA, as well as after establishment of SACP. Patient and procedural characteristics and outcomes were determined and compared after stratification by the presence of ischemic EEG changes. RESULTS The study included 71 patients. Before CA, 47 patients (66%) demonstrated a continuous EEG pattern, with or without periodic complexes, and 24 (34%) had a burst suppression EEG pattern. Immediately after CA, abrupt loss of electrocerebral activity occurred in 32 patients (45%), suggestive of cerebral ischemia. Establishment of unilateral SACP rapidly restored electrocerebral activity in all but 2 patients. One patient had persistent loss of left-sided activity, which resolved after transition to bilateral SACP. Another patient had persistent global loss of activity and was placed back on cardiopulmonary bypass for further cooling before reinitiation of CA. No significant differences in characteristics or outcomes were assessed between patients with and without loss of EEG activity. CONCLUSIONS Nearly half of patients undergoing hemiarch replacement with MHCA/SACP experience abrupt loss of electrocerebral activity after CA is initiated. Although unilateral SACP usually restores prearrest electrocerebral activity, intraoperative EEG may be particularly valuable for the identification of patients with persistent cerebral ischemia even after SACP.
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The human burst suppression electroencephalogram of deep hypothermia. Clin Neurophysiol 2015; 126:1901-1914. [PMID: 25649968 DOI: 10.1016/j.clinph.2014.12.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/27/2014] [Accepted: 12/27/2014] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Deep hypothermia induces 'burst suppression' (BS), an electroencephalogram pattern with low-voltage 'suppressions' alternating with high-voltage 'bursts'. Current understanding of BS comes mainly from anesthesia studies, while hypothermia-induced BS has received little study. We set out to investigate the electroencephalogram changes induced by cooling the human brain through increasing depths of BS through isoelectricity. METHODS We recorded scalp electroencephalograms from eleven patients undergoing deep hypothermia during cardiac surgery with complete circulatory arrest, and analyzed these using methods of spectral analysis. RESULTS Within patients, the depth of BS systematically depends on the depth of hypothermia, though responses vary between patients except at temperature extremes. With decreasing temperature, burst lengths increase, and burst amplitudes and lengths decrease, while the spectral content of bursts remains constant. CONCLUSIONS These findings support an existing theoretical model in which the common mechanism of burst suppression across diverse etiologies is the cyclical diffuse depletion of metabolic resources, and suggest the new hypothesis of local micro-network dropout to explain decreasing burst amplitudes at lower temperatures. SIGNIFICANCE These results pave the way for accurate noninvasive tracking of brain metabolic state during surgical procedures under deep hypothermia, and suggest new testable predictions about the network mechanisms underlying burst suppression.
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Gutsche JT, Ghadimi K, Patel PA, Robinson AR, Lane BJ, Szeto WY, Augoustides JG. New Frontiers in Aortic Therapy: Focus on Deep Hypothermic Circulatory Arrest. J Cardiothorac Vasc Anesth 2014; 28:1159-63. [DOI: 10.1053/j.jvca.2014.03.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Indexed: 01/03/2023]
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Ganapathi AM, Hanna JM, Schechter MA, Englum BR, Castleberry AW, Gaca JG, Hughes GC. Antegrade versus retrograde cerebral perfusion for hemiarch replacement with deep hypothermic circulatory arrest: does it matter? A propensity-matched analysis. J Thorac Cardiovasc Surg 2014; 148:2896-902. [PMID: 24908350 DOI: 10.1016/j.jtcvs.2014.04.014] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/17/2014] [Accepted: 04/08/2014] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The choice of cerebral perfusion strategy for aortic arch surgery has been debated, and the superiority of antegrade (ACP) or retrograde (RCP) cerebral perfusion has not been shown. We examined the early and late outcomes for ACP versus RCP in proximal (hemi-) arch replacement using deep hypothermic circulatory arrest (DHCA). METHODS A retrospective analysis of a prospectively maintained database was performed for all patients undergoing elective and nonelective hemiarch replacement at a single referral institution from June 2005 to February 2013. Total arch cases were excluded to limit the analysis to shorter DHCA times and a more uniform patient population for whom clinical equipoise regarding ACP versus RCP exists. A total of 440 procedures were identified, with 360 (82%) using ACP and 80 (18%) using RCP. The endpoints included 30-day/in-hospital and late outcomes. A propensity score with 1:1 matching of 40 pre- and intraoperative variables was used to adjust for differences between the 2 groups. RESULTS All 80 RCP patients were propensity matched to a cohort of 80 similar ACP patients. The pre- and intraoperative characteristics were not significantly different between the 2 groups after matching. No differences were found in 30-day/in-hospital mortality or morbidity outcomes. The only significant difference between the 2 groups was a shorter mean operative time in the RCP cohort (P = .01). No significant differences were noted in late survival (P = .90). CONCLUSIONS In proximal arch operations using DHCA, equivalent early and late outcomes can be achieved with RCP and ACP, although the mean operative time is significantly less with RCP, likely owing to avoidance of axillary cannulation. Questions remain regarding comparative outcomes with straight DHCA and lesser degrees of hypothermia.
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Affiliation(s)
- Asvin M Ganapathi
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Jennifer M Hanna
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Matthew A Schechter
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Brian R Englum
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Anthony W Castleberry
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - Jeffrey G Gaca
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC
| | - G Chad Hughes
- Duke Center for Aortic Disease, Division of Cardiovascular and Thoracic Surgery, Department of Surgery, Duke University Medical Center, Durham, NC.
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Al Kindi AH, Al Kimyani N, Alameddine T, Al Abri Q, Balan B, Al Sabti H. "Open" approach to aortic arch aneurysm repair. J Saudi Heart Assoc 2014; 26:152-61. [PMID: 24954988 DOI: 10.1016/j.jsha.2014.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/04/2014] [Accepted: 02/18/2014] [Indexed: 11/30/2022] Open
Abstract
Aortic arch aneurysm is a relatively rare entity in cardiac surgery. Repair of such aneurysms, either in isolation or combined with other cardiac procedures, remains a challenging task. The need to produce a relatively bloodless surgical field with circulatory arrest, while at the same time protecting the brain, is the hallmark of this challenge. However, a clear understanding of the topic allows a better and less morbid approach to such a complex surgery. Literature has shown the advantage of selective cerebral perfusion techniques in comparison with only circulatory arrest. Ability to perfuse the brain has allowed circulatory arrest temperatures at moderate hypothermia without the need for deep hypothermia. Even though cannulation site selection appears to be a minor issue, literature has shown that the subclavian/axillary route has the best outcomes and that femoral cannulation should only be reserved for no access patients. Although different techniques for arch anastomosis have been described, we routinely perform the distal first technique as we find it to be less cumbersome and easiest to reproduce. In this review our aim is to outline a systematic approach to aortic arch surgery. Starting with indications for intervention and proceeding with approaches on site of cannulation, approaches to brain protection with hypothermia and selective cerebral perfusion and finally surgical steps in performing the distal and arch vessels anastomosis.
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Affiliation(s)
- Adil H Al Kindi
- Division of Cardiothoracic Surgery, Department of Surgery, Sultan Qaboos University Hospital, Muscat
| | - Nasser Al Kimyani
- Division of Cardiac Anesthesia, Department of Anesthesia, Sultan Qaboos University Hospital, Muscat
| | - Tarek Alameddine
- Division of Cardiothoracic Surgery, Department of Surgery, Sultan Qaboos University Hospital, Muscat
| | - Qasim Al Abri
- Division of Cardiothoracic Surgery, Department of Surgery, Sultan Qaboos University Hospital, Muscat
| | - Baskaran Balan
- Division of Cardiothoracic Surgery, Department of Surgery, Sultan Qaboos University Hospital, Muscat
| | - Hilal Al Sabti
- Division of Cardiothoracic Surgery, Department of Surgery, Sultan Qaboos University Hospital, Muscat
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Andersen ND, Ganapathi AM, Hanna JM, Williams JB, Gaca JG, Hughes GC. Outcomes of acute type a dissection repair before and after implementation of a multidisciplinary thoracic aortic surgery program. J Am Coll Cardiol 2014; 63:1796-803. [PMID: 24412454 DOI: 10.1016/j.jacc.2013.10.085] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 08/29/2013] [Accepted: 10/08/2013] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The purpose of this study was to compare the results of acute type A aortic dissection (ATAAD) repair before and after implementation of a multidisciplinary thoracic aortic surgery program (TASP) at our institution, with dedicated high-volume thoracic aortic surgeons, a multidisciplinary approach to thoracic aortic disease management, and a standardized protocol for ATAAD repair. BACKGROUND Outcomes of ATAAD repair may be improved when operations are performed at specialized high-volume thoracic aortic surgical centers. METHODS Between 1999 and 2011, 128 patients underwent ATAAD repair at our institution. Records of patients who underwent ATAAD repair 6 years before (n = 56) and 6 years after (n = 72) implementation of the TASP were retrospectively compared. Expected operative mortality rates were calculated using the International Registry of Acute Aortic Dissection pre-operative prediction model. RESULTS Baseline risk profiles and expected operative mortality rates were comparable between patients who underwent surgery before and after implementation of the TASP. Operative mortality before TASP implementation was 33.9% and was statistically equivalent to the expected operative mortality rate of 26.0% (observed-to-expected mortality ratio 1.30; p = 0.54). Operative mortality after TASP implementation fell to 2.8% and was statistically improved compared with the expected operative mortality rate of 18.2% (observed-to-expected mortality ratio 0.15; p = 0.005). Differences in survival persisted over long-term follow-up, with 5-year survival rates of 85% observed for TASP patients compared with 55% for pre-TASP patients (p = 0.002). CONCLUSIONS ATAAD repair can be performed with results approximating those of elective proximal aortic surgery when operations are performed by a high-volume multidisciplinary thoracic aortic surgery team. Efforts to standardize or centralize care of patients undergoing ATAAD are warranted.
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Affiliation(s)
- Nicholas D Andersen
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina
| | - Asvin M Ganapathi
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina
| | - Jennifer M Hanna
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina
| | - Judson B Williams
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina
| | - Jeffrey G Gaca
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina
| | - G Chad Hughes
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina.
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Yan TD, Bannon PG, Bavaria J, Coselli JS, Elefteriades JA, Griepp RB, Hughes GC, LeMaire SA, Kazui T, Kouchoukos NT, Misfeld M, Mohr FW, Oo A, Svensson LG, Tian DH. Consensus on hypothermia in aortic arch surgery. Ann Cardiothorac Surg 2013; 2:163-8. [PMID: 23977577 DOI: 10.3978/j.issn.2225-319x.2013.03.03] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Accepted: 03/06/2013] [Indexed: 11/14/2022]
Abstract
Considered a standard part of aortic arch surgery, hypothermia can sufficiently reduce cerebral metabolic demand to permit reasonable periods of circulatory arrest. Yet despite its ubiquitous application and critical importance, temperature classification in hypothermic circulatory arrest is still without clear definition. The following Consensus from experts in high-volume aortic institutions defines 'profound', 'deep', 'moderate', and 'mild' hypothermia and recommends standardized monitoring sites, so as to facilitate more consistent reporting and robust analysis.
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Affiliation(s)
- Tristan D Yan
- The Collaborative Research (CORE) Group, Sydney, Australia; ; Department of Cardiothoracic Surgery, Royal Prince Alfred Hospital, University of Sydney, Sydney, Australia
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Englum BR, Andersen ND, Husain AM, Mathew JP, Hughes GC. Degree of hypothermia in aortic arch surgery - optimal temperature for cerebral and spinal protection: deep hypothermia remains the gold standard in the absence of randomized data. Ann Cardiothorac Surg 2013; 2:184-93. [PMID: 23977581 DOI: 10.3978/j.issn.2225-319x.2013.03.01] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 03/06/2013] [Indexed: 11/14/2022]
Affiliation(s)
- Brian R Englum
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, North Carolina, USA
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