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Ishida K, Kohno H, Matsuura K, Watanabe M, Sugiura T, Jujo Sanada T, Naito A, Shigeta A, Suda R, Sekine A, Masuda M, Sakao S, Tanabe N, Tatsumi K, Matsumiya G. Modification of pulmonary endarterectomy to prevent neurologic adverse events. Surg Today 2023; 53:369-378. [PMID: 36018416 DOI: 10.1007/s00595-022-02573-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 07/16/2022] [Indexed: 10/15/2022]
Abstract
PURPOSE Neurologic adverse events (NAEs) are a major complication after pulmonary endarterectomy (PEA) performed under periods of deep hypothermic circulatory arrest (HCA) for chronic thromboembolic pulmonary hypertension. We modified the PEA strategy to prevent NAEs and evaluated the effectiveness of these modifications. METHODS We reviewed the surgical outcomes of 87 patients divided into the following three groups based on the surgical strategy used: group S (n = 49), periods of deep HCA with alpha-stat strategy; group M1 (n = 19), deep HCA with modifications of slower cooling and rewarming rates and the pH-stat strategy for cooling: and group M2 (n = 13), multiple short periods of moderate HCA. RESULTS PEA provided significant improvement of pulmonary hemodynamics in each group. Sixteen (29%) of the 49 group S patients suffered NAEs, associated with total circulatory arrest time (cutoff, 57 min) and Jamieson type I disease. The Group M1 and M2 patients did not suffer NAEs, although the group M1 patients had prolonged cardiopulmonary bypass (CPB) and more frequent respiratory failure. CONCLUSIONS NAEs were common after PEA performed under periods of deep HCA. The modified surgical strategy could decrease the risk of NAEs but increase the risk of respiratory failure. Multiple short periods of moderate HCA may be useful for patients at risk of NAEs.
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Affiliation(s)
- Keiichi Ishida
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan.
| | - Hiroki Kohno
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Kaoru Matsuura
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Michiko Watanabe
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Toshihiko Sugiura
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Takayuki Jujo Sanada
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Akira Naito
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Ayako Shigeta
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Rika Suda
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Ayumi Sekine
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Masahisa Masuda
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Seiichiro Sakao
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Nobuhiro Tanabe
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Koichiro Tatsumi
- Department of Respirology, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Goro Matsumiya
- Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
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Qu JZ, Kao LW, Smith JE, Kuo A, Xue A, Iyer MH, Essandoh MK, Dalia AA. Brain Protection in Aortic Arch Surgery: An Evolving Field. J Cardiothorac Vasc Anesth 2020; 35:1176-1188. [PMID: 33309497 DOI: 10.1053/j.jvca.2020.11.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/10/2020] [Accepted: 11/16/2020] [Indexed: 12/11/2022]
Abstract
Despite advances in cardiac surgery and anesthesia, the rates of brain injury remain high in aortic arch surgery requiring circulatory arrest. The mechanisms of brain injury, including permanent and temporary neurologic dysfunction, are multifactorial, but intraoperative brain ischemia is likely a major contributor. Maintaining optimal cerebral perfusion during cardiopulmonary bypass and circulatory arrest is the key component of intraoperative management for aortic arch surgery. Various brain monitoring modalities provide different information to improve cerebral protection. Electroencephalography gives crucial data to ensure minimal cerebral metabolism during deep hypothermic circulatory arrest, transcranial Doppler directly measures cerebral arterial blood flow, and near-infrared spectroscopy monitors regional cerebral oxygen saturation. Various brain protection techniques, including hypothermia, cerebral perfusion, pharmacologic protection, and blood gas management, have been used during interruption of systemic circulation, but the optimal strategy remains elusive. Although deep hypothermic circulatory arrest and retrograde cerebral perfusion have their merits, there have been increasing reports about the use of antegrade cerebral perfusion, obviating the need for deep hypothermia. With controversy and variability of surgical practices, moderate hypothermia, when combined with unilateral antegrade cerebral perfusion, is considered safe for brain protection in aortic arch surgery performed with circulatory arrest. The neurologic outcomes of brain protection in aortic arch surgery largely depend on the following three major components: cerebral temperature, circulatory arrest time, and cerebral perfusion during circulatory arrest. The optimal brain protection strategy should be individualized based on comprehensive monitoring and stems from well-executed techniques that balance the major components contributing to brain injury.
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Affiliation(s)
- Jason Z Qu
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Lee-Wei Kao
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Jennifer E Smith
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Alexander Kuo
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Albert Xue
- Department of Cardiac Surgery, Nanjing Drum Tower Hospital, Nanjing, China
| | - Manoj H Iyer
- Department of Anesthesiology, The Ohio State University Medical Center, Columbus, OH
| | - Michael K Essandoh
- Department of Anesthesiology, The Ohio State University Medical Center, Columbus, OH
| | - Adam A Dalia
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA.
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Arcieri L, Federici D, Giordano R. Current trends in perfusion strategies for neonates undergoing aortic arch repair: the rough path to the perfect idea. J Thorac Dis 2020; 12:3436-3438. [PMID: 32642273 PMCID: PMC7330764 DOI: 10.21037/jtd.2020.01.60] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Luigi Arcieri
- Pediatric Cardiac Surgery Unit, Heart Hospital, G. Monasterio Foundation, Massa, Italy
| | - Duccio Federici
- Pediatric Cardiac Surgery Unit, Heart Hospital, G. Monasterio Foundation, Massa, Italy
| | - Raffaele Giordano
- Department of Advanced Biomedical Sciences, Adult and Pediatric Cardiac Surgery, University of Naples Federico II, Napoli, Italy
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Szakmar E, Jermendy A, El-Dib M. Respiratory management during therapeutic hypothermia for hypoxic-ischemic encephalopathy. J Perinatol 2019; 39:763-773. [PMID: 30858610 DOI: 10.1038/s41372-019-0349-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/18/2019] [Accepted: 01/30/2019] [Indexed: 01/01/2023]
Abstract
Therapeutic hypothermia (TH) has become the standard of care treatment to improve morbidity and mortality in infants with hypoxic-ischemic encephalopathy (HIE). Although TH has clearly proven to be beneficial, recent studies suggest optimization of respiratory management as an approach to prevent further damage and improve neurodevelopmental outcome. The ventilatory management of asphyxiated neonates presents a challenge because both the hypoxic insult and TH have an impact on respiratory functions. Although the danger of recurrence of hypocapnia is well recognized, a brief period of severe hyperoxia also can be detrimental to the previously compromised brain and have been shown to increase the risk of adverse neurodevelopmental outcomes. Therefore, judicious ventilatory management with rigorous monitoring is of particular importance in patients with HIE. In the present review, we provide an overview of the currently available evidence on pulmonary function, respiratory morbidities, and ventilation strategies in HIE and we highlight possible future research directions.
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Affiliation(s)
- Eniko Szakmar
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary.,Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Agnes Jermendy
- 1st Department of Pediatrics, Semmelweis University, Budapest, Hungary
| | - Mohamed El-Dib
- Department of Pediatric Newborn Medicine, Brigham and Women's Hospital, Boston, MA, USA.
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Andrews PJ, Sinclair HL, Rodríguez A, Harris B, Rhodes J, Watson H, Murray G. Therapeutic hypothermia to reduce intracranial pressure after traumatic brain injury: the Eurotherm3235 RCT. Health Technol Assess 2019; 22:1-134. [PMID: 30168413 DOI: 10.3310/hta22450] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Traumatic brain injury (TBI) is a major cause of disability and death in young adults worldwide. It results in around 1 million hospital admissions annually in the European Union (EU), causes a majority of the 50,000 deaths from road traffic accidents and leaves a further ≈10,000 people severely disabled. OBJECTIVE The Eurotherm3235 Trial was a pragmatic trial examining the effectiveness of hypothermia (32-35 °C) to reduce raised intracranial pressure (ICP) following severe TBI and reduce morbidity and mortality 6 months after TBI. DESIGN An international, multicentre, randomised controlled trial. SETTING Specialist neurological critical care units. PARTICIPANTS We included adult participants following TBI. Eligible patients had ICP monitoring in place with an ICP of > 20 mmHg despite first-line treatments. Participants were randomised to receive standard care with the addition of hypothermia (32-35 °C) or standard care alone. Online randomisation and the use of an electronic case report form (CRF) ensured concealment of random treatment allocation. It was not possible to blind local investigators to allocation as it was obvious which participants were receiving hypothermia. We collected information on how well the participant had recovered 6 months after injury. This information was provided either by the participant themself (if they were able) and/or a person close to them by completing the Glasgow Outcome Scale - Extended (GOSE) questionnaire. Telephone follow-up was carried out by a blinded independent clinician. INTERVENTIONS The primary intervention to reduce ICP in the hypothermia group after randomisation was induction of hypothermia. Core temperature was initially reduced to 35 °C and decreased incrementally to a lower limit of 32 °C if necessary to maintain ICP at < 20 mmHg. Rewarming began after 48 hours if ICP remained controlled. Participants in the standard-care group received usual care at that centre, but without hypothermia. MAIN OUTCOME MEASURES The primary outcome measure was the GOSE [range 1 (dead) to 8 (upper good recovery)] at 6 months after the injury as assessed by an independent collaborator, blind to the intervention. A priori subgroup analysis tested the relationship between minimisation factors including being aged < 45 years, having a post-resuscitation Glasgow Coma Scale (GCS) motor score of < 2 on admission, having a time from injury of < 12 hours and patient outcome. RESULTS We enrolled 387 patients from 47 centres in 18 countries. The trial was closed to recruitment following concerns raised by the Data and Safety Monitoring Committee in October 2014. On an intention-to-treat basis, 195 participants were randomised to hypothermia treatment and 192 to standard care. Regarding participant outcome, there was a higher mortality rate and poorer functional recovery at 6 months in the hypothermia group. The adjusted common odds ratio (OR) for the primary statistical analysis of the GOSE was 1.54 [95% confidence interval (CI) 1.03 to 2.31]; when the GOSE was dichotomised the OR was 1.74 (95% CI 1.09 to 2.77). Both results favoured standard care alone. In this pragmatic study, we did not collect data on adverse events. Data on serious adverse events (SAEs) were collected but were subject to reporting bias, with most SAEs being reported in the hypothermia group. CONCLUSIONS In participants following TBI and with an ICP of > 20 mmHg, titrated therapeutic hypothermia successfully reduced ICP but led to a higher mortality rate and worse functional outcome. LIMITATIONS Inability to blind treatment allocation as it was obvious which participants were randomised to the hypothermia group; there was biased recording of SAEs in the hypothermia group. We now believe that more adequately powered clinical trials of common therapies used to reduce ICP, such as hypertonic therapy, barbiturates and hyperventilation, are required to assess their potential benefits and risks to patients. TRIAL REGISTRATION Current Controlled Trials ISRCTN34555414. FUNDING This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 22, No. 45. See the NIHR Journals Library website for further project information. The European Society of Intensive Care Medicine supported the pilot phase of this trial.
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Affiliation(s)
- Peter Jd Andrews
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - H Louise Sinclair
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Aryelly Rodríguez
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
| | - Bridget Harris
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | | | - Gordon Murray
- Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
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Ito H, Mizumoto T, Sawada Y, Fujinaga K, Tempaku H, Yamamoto Y, Tsutsui K, Shimpo H. Neuroprotective effect of pressure-oriented flow regulation and pH-stat management in selective antegrade brain perfusion during total aortic arch repair. Interact Cardiovasc Thorac Surg 2017. [PMID: 28637170 DOI: 10.1093/icvts/ivx182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES The aim of this study was to assess the safety and effectiveness of our selective antegrade brain perfusion (SABP) strategy, which is characterized by moderate hypothermic and low-pressure management under pH-stat using a completely closed cardiopulmonary bypass circuit with a single centrifugal pump. METHODS Forty-nine consecutive patients (median age, 74) underwent total aortic arch replacement using a 4-branched graft. SABP was conducted with individual cannulation in all arch vessels. The SABP flow rate was monitored, and the flow rates of each arch vessel were also measured in patients with available data. RESULTS One patient died of cerebral infarction, and 7 had transient neurological deficits without apparent findings on postoperative imaging studies and without residual sequels at hospital discharge. The operation, cardiopulmonary bypass, cardiac arrest, circulatory arrest and SABP times were 327 min (interquartile range, 292-381), 211 (184-247), 107 (84.8-138.3), 54.0 (48-68) and 137 (114-158), respectively. The total flow of the SABP was 18.1 ml/kg/min (15.7-20.9). The flow rates of the brachiocephalic, the left carotid and the left subclavian arteries were 9.5 ml/kg/min (7.7-11.5), 4.2 (2.8-5.7) and 4.5 (3.7-5.5), respectively. Only the flow rate of the brachiocephalic artery was significantly correlated with the total SABP flow rate (Spearman rank correlation coefficient, r = 0.58, P < 0.01). CONCLUSIONS The moderate hypothermic, high-flow, low-pressure SABP strategy with pH-stat management can be applied in adult aortic surgery; however, the feasibility and effectiveness of this concept need further evaluation in a prospective controlled study.
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Affiliation(s)
- Hisato Ito
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Toru Mizumoto
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Yasuhiro Sawada
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Kazuya Fujinaga
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Hironori Tempaku
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Yasunori Yamamoto
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Katsuhiro Tsutsui
- Department of Cardiothoracic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan
| | - Hideto Shimpo
- Department of Thoracic and Cardiovascular Surgery, Mie University, Tsu, Mie, Japan
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7
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Mulder M, Geocadin RG. Neurology of cardiopulmonary resuscitation. HANDBOOK OF CLINICAL NEUROLOGY 2017; 141:593-617. [PMID: 28190437 DOI: 10.1016/b978-0-444-63599-0.00032-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This chapter aims to provide an up-to-date review of the science and clinical practice pertaining to neurologic injury after successful cardiopulmonary resuscitation. The past two decades have seen a major shift in the science and practice of cardiopulmonary resuscitation, with a major emphasis on postresuscitation neurologic care. This chapter provides a nuanced and thoughtful historic and bench-to-bedside overview of the neurologic aspects of cardiopulmonary resuscitation. A particular emphasis is made on the anatomy and pathophysiology of hypoxic-ischemic encephalopathy, up-to-date management of survivors of cardiopulmonary resuscitation, and a careful discussion on neurologic outcome prediction. Guidance to practice evidence-based clinical care when able and thoughtful, pragmatic suggestions for care where evidence is lacking are also provided. This chapter serves as both a useful clinical guide and an updated, thorough, and state-of-the-art reference on the topic for advanced students and experienced practitioners in the field.
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Affiliation(s)
- M Mulder
- Department of Critical Care and the John Nasseff Neuroscience Institute, Abbott Northwestern Hospital, Allina Health, Minneapolis, MN, USA
| | - R G Geocadin
- Neurosciences Critical Care Division, Department of Anesthesiology and Critical Care Medicine and Departments of Neurology and Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Williams GD, Ramamoorthy C. Brain Monitoring and Protection During Pediatric Cardiac Surgery. Semin Cardiothorac Vasc Anesth 2016; 11:23-33. [PMID: 17484171 DOI: 10.1177/1089253206297412] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
With advances in medical care, survival after cardiac surgery for congenital heart disease has dramatically improved, and attention is increasingly focused on longterm functional morbidities, especially neurodevelopmental outcomes, with their profound consequences to patients and society. There are multiple reasons for concern about brain injury. Some cardiac defects are associated with brain anomalies and altered cerebral blood flow regulation. Brain imaging studies have demonstrated that injury to gray and white matter is quite frequent before heart surgery in neonates. Cardiopulmonary bypass and deep hypothermic circulatory arrest are associated with shortand longer-term adverse neurologic outcome. Additional brain injury can occur during the patient's recovery from surgery. Strategies to optimize neurologic outcome continue to evolve. With new technological developments, perioperative neurologic monitoring of small children has become easier, and data suggest these modalities usefully identify adverse neurologic events and might predict outcome. Monitoring methods to be discussed include processed electroencephalography, near infrared spectroscopy, and transcranial Doppler ultrasound. Alternative perfusion techniques to deep hypothermic circulatory arrest have been developed, such as regional antegrade cerebral perfusion during cardiopulmonary bypass. Other neuroprotective strategies employed during open-heart surgery include temperature regulation, acid-base management, degree of hemodilution, blood glucose control and anti-inflammatory therapies. Evidence of the impact of these measures on neurologic outcome is examined, and deficiencies in our current understanding of neurologic function in children with congenital heart disease are identified.
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Affiliation(s)
- Glyn D Williams
- Department of Anesthesia, Stanford University Medical School, California 94305, USA.
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Sakamoto T. Current status of brain protection during surgery for congenital cardiac defect. Gen Thorac Cardiovasc Surg 2015; 64:72-81. [PMID: 26620539 DOI: 10.1007/s11748-015-0606-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Indexed: 10/22/2022]
Abstract
The long-term neurodevelopmental outcome has been a great concern for cardiac surgeons although it is still unclear. There are some risks regarding the neurological and neuropsychological deficits before, during and after cardiovascular surgery. Current status of brain protection during congenital heart surgery could be reported. The incidence of neurologic outcome and the appropriate CPB strategy for brain protection are stated, and the latest data of neurodevelopmental outcome after pediatric cardiac surgery are clarified.
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Affiliation(s)
- Takahiko Sakamoto
- Division of Pediatric Cardiovascular Surgery, Department of Cardiovascular Surgery, The Heart Institute of Japan, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan.
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10
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Off-pump hepatic to azygos connection via thoracotomy for relief of fistulas after a Kawashima procedure: Ten-year results. J Thorac Cardiovasc Surg 2015; 149:1524-30. [DOI: 10.1016/j.jtcvs.2015.02.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 02/17/2015] [Accepted: 02/21/2015] [Indexed: 11/20/2022]
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Babu B, Caldarone CA. Management of tetralogy of Fallot with unilateral absence of pulmonary artery: an overview. World J Pediatr Congenit Heart Surg 2014; 5:70-9. [PMID: 24403358 DOI: 10.1177/2150135113506597] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Tetralogy of Fallot with unilateral absence of pulmonary artery (PA) is a rare congenital anomaly that has been reported in isolated case reports and small case series. There is no well-defined treatment algorithm for these patients, and repair has been associated with high mortality, although survival is improving in the more recent era. Recent reports suggest strict case selection criteria based on PA dimensions and size of the left ventricle.
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Affiliation(s)
- Balram Babu
- Department of Cardiothoracic Surgery, Apollo Hospitals, Bangalore, Karnataka, India
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12
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Jonas RA. Tetralogy of Fallot with pulmonary atresia and major aortopulmonary vessels. Perfusion 2014; 29:571-2. [PMID: 24947457 DOI: 10.1177/0267659114540573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Issitt RW, Robertson DA, Crook RM, Cross NT, Shaw M, Tsang VT. Tetralogy of Fallot with pulmonary atresia and major aortopulmonary collateral vessels. Perfusion 2014; 29:567-70. [PMID: 24947458 DOI: 10.1177/0267659114540019] [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] [Indexed: 11/16/2022]
Abstract
Major aortopulmonary collateral arteries (MAPCAs) provide significant issues during cardiopulmonary bypass, including flooding of the surgical field which requires significant blood volumes to be returned to the extracorporeal circuit via handheld suckers. This has been shown to be the major source of gaseous microemboli and is associated with adverse neurological outcome. Use of pH-stat has been previously shown to decrease the shunt through MAPCAs via an unknown mechanism. Here, we report the associated benefits of pH-stat in decreasing sucker usage and gaseous microemboli in a patient with known MAPCAs presenting for repair of tetralogy of Fallot and pulmonary atresia.
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Affiliation(s)
- R W Issitt
- Department of Clinical Perfusion, Great Ormond Street Hospital, London, UK Institute of Cardiovascular Science, University College London, UK
| | - D A Robertson
- Department of Clinical Perfusion, Great Ormond Street Hospital, London, UK
| | - R M Crook
- Department of Clinical Perfusion, Great Ormond Street Hospital, London, UK
| | - N T Cross
- Department of Clinical Perfusion, Great Ormond Street Hospital, London, UK
| | - M Shaw
- Department of Clinical Perfusion, Great Ormond Street Hospital, London, UK
| | - V T Tsang
- Institute of Cardiovascular Science, University College London, UK Department of Cardiothoracic Surgery, Great Ormond Street Hospital, London, UK
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Issitt R, Robertson A, Cross N, Crook R, Molyneux V, Shaw M, Walton N, Tsang V. Clinical experience with Affinity Pixie oxygenation system in paediatric and infant patients. Perfusion 2014; 29:194-8. [PMID: 24447948 DOI: 10.1177/0267659114521101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Great Ormond Street Children's Hospital undertakes over 500 open heart cardiothoracic procedures requiring cardiopulmonary bypass per year. Data from our centre show that many of our neonatal/paediatric patients require higher cardiac indexes than previously thought. We evaluated the new Pixie oxygenation system, rated from 0.1 L/min to 2 L/min, to determine if it could be used for these patients. METHODS Between 2010 and 2012, 250 Pixie oxygenators were used on consecutive patients requiring correction of congenital cardiac defects. Data were collected on FiO2 requirements, oxygenator pressure drop and gaseous microemboli handling. Retrospective analysis was also undertaken on the procedures and demographics of all patients during 2011-2012 to determine the percentage of patients on whom the Pixie could be used. RESULTS Analysis of the procedures undertaken at Great Ormond Street Hospital (GOSH) showed that 89% were in patients under 20 kg, requiring a flow rate of <2 L/min (at a base cardiac index of 2.8 L/min/m2). The maximum FiO2 required at 2.5 L/min was 85%. Gaseous microemboli were reduced by 82.5±9.9% and bubble volume was decreased by 94.3±8.4% from the 'venous' pre-oxygenator to the 'arterial' post-oxygenator. DISCUSSION The Pixie oxygenator proved effective at flows up to 2.5 L/min, with air-handling capabilities comparable with other oxygenators. This represents a single oxygenator that could potentially be used to cover 89% of our surgical procedures. However, we believe that, for the smallest patients (i.e., < 2 kg), a smaller priming oxygenator should be used in order to limit unnecessary haemodilution in this vulnerable group.
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Affiliation(s)
- R Issitt
- Department of Clinical Perfusion Great Ormond Street Children's Hospital, London, UK
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15
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Skhirtladze-Dworschak K, Dworschak M. Cerebral oximetry and cardiac arrest. Semin Cardiothorac Vasc Anesth 2013; 17:269-75. [PMID: 23782549 DOI: 10.1177/1089253213492861] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cerebral oximetry is a Food and Drug Administration-approved technology that allows monitoring of brain oxygen saturation in accessible superficial brain cortex regions, which are amongst the most vulnerable in regard to ischemic or hypoxic injury. Since most oxygen in the area of interest is located in the venous compartment, the determined regional brain oxygen saturation approximately reflects the local balance between oxygen delivery and oxygen consumption. Major systemic alterations in blood oxygen content and oxygen delivery will be accompanied by corresponding changes in regional brain saturation. This systematic review, which is based on a Medline search, focuses on the characteristic changes in regional cerebral oxygen saturation that occur, when global oxygen supply to the brain ceases. It further highlights the potential application of cerebral oximetry in the management of cardiac arrest victims, the predictability of clinical outcome after global cerebral ischemia, and it also indicates possible potentials for the management of cerebral reperfusion after having instituted return of spontaneous circulation.
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Vernick WJ, Gutsche JT. Pro: Cerebral Oximetry Should be a Routine Monitor During Cardiac Surgery. J Cardiothorac Vasc Anesth 2013; 27:385-9. [DOI: 10.1053/j.jvca.2012.12.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Indexed: 12/13/2022]
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Svyatets M, Tolani K, Zhang M, Tulman G, Charchaflieh J. Perioperative Management of Deep Hypothermic Circulatory Arrest. J Cardiothorac Vasc Anesth 2010; 24:644-55. [DOI: 10.1053/j.jvca.2010.02.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Indexed: 11/11/2022]
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Abdul Aziz KA, Meduoye A. Is pH-stat or alpha-stat the best technique to follow in patients undergoing deep hypothermic circulatory arrest? Interact Cardiovasc Thorac Surg 2010; 10:271-82. [DOI: 10.1510/icvts.2009.214130] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Fujii Y, Kotani Y, Kawabata T, Ugaki S, Sakurai S, Ebishima H, Itoh H, Nakakura M, Arai S, Kasahara S, Sano S, Iwasaki T, Toda Y. The Benefits of High-flow Management in Children With Pulmonary Atresia. Artif Organs 2009; 33:888-95. [DOI: 10.1111/j.1525-1594.2009.00895.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Near-infrared spectroscopy: What we know and what we need to know—A systematic review of the congenital heart disease literature. J Thorac Cardiovasc Surg 2009; 137:154-9, 159e1-12. [DOI: 10.1016/j.jtcvs.2008.08.005] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Revised: 05/05/2008] [Accepted: 08/02/2008] [Indexed: 11/18/2022]
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21
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The Effect of Temperature Correction of Blood Gas Values on the Accuracy of End-Tidal Carbon Dioxide Monitoring in Children after Cardiac Surgery. ASAIO J 2007; 53:670-4. [DOI: 10.1097/mat.0b013e3181569bf3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Hoffman GM. Neurologic monitoring on cardiopulmonary bypass: what are we obligated to do? Ann Thorac Surg 2007; 81:S2373-80. [PMID: 16731106 DOI: 10.1016/j.athoracsur.2006.02.076] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2005] [Revised: 01/17/2006] [Accepted: 02/04/2006] [Indexed: 11/18/2022]
Abstract
Improving survival from congenital cardiac repairs using cardiopulmonary bypass has appropriately shifted focus to neurologic outcomes. Hypoxic-ischemic mechanisms are the major cause of neurologic injury in neonatal cardiac surgery, and modifications of techniques of cardiopulmonary bypass can affect organ oxygen delivery and the propensity to injury both during and after surgery. Through successive refinements in the techniques of cardiopulmonary bypass, the risk factors for hypoxic-ischemic injury have been reduced, but not eliminated. The application of specific monitoring to enhance detection of hypoxic conditions associated with neurologic injury would both allow intervention on individual patients and drive refinements in strategies to further reduce risk. Specific neurologic monitoring techniques that can be used during cardiopulmonary bypass include near-infrared spectroscopy, transcranial Doppler ultrasonography, and electroencephalographic techniques. Of these, only near-infrared spectroscopy provides a continuous quantitative signal of the physiologic variable most related to injury and most amenable to intervention. This review will advocate wide adoption of near-infrared spectroscopy monitoring throughout the perioperative period, to enhance detection of hypoxic conditions and to drive patient-specific interventions.
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MESH Headings
- Brain Damage, Chronic/etiology
- Brain Damage, Chronic/physiopathology
- Brain Damage, Chronic/prevention & control
- Cardiopulmonary Bypass/adverse effects
- Electroencephalography
- Extracorporeal Membrane Oxygenation
- Hemoglobinometry/instrumentation
- Hemoglobinometry/methods
- Humans
- Hypoxia/diagnosis
- Hypoxia/etiology
- Hypoxia/physiopathology
- Hypoxia-Ischemia, Brain/diagnosis
- Hypoxia-Ischemia, Brain/diagnostic imaging
- Hypoxia-Ischemia, Brain/etiology
- Hypoxia-Ischemia, Brain/physiopathology
- Hypoxia-Ischemia, Brain/prevention & control
- Infant
- Infant, Newborn
- Intracranial Embolism/diagnosis
- Intracranial Embolism/etiology
- Intracranial Embolism/physiopathology
- Intracranial Embolism/prevention & control
- Intraoperative Complications/diagnosis
- Intraoperative Complications/etiology
- Intraoperative Complications/physiopathology
- Intraoperative Complications/prevention & control
- Magnetic Resonance Imaging
- Monitoring, Intraoperative
- Oxyhemoglobins/analysis
- Postoperative Complications/diagnosis
- Postoperative Complications/etiology
- Postoperative Complications/physiopathology
- Postoperative Complications/prevention & control
- Risk Factors
- Spectroscopy, Near-Infrared/methods
- Spectroscopy, Near-Infrared/standards
- Ultrasonography, Doppler, Transcranial
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Affiliation(s)
- George M Hoffman
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Wisconsin, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA.
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Dominguez TE, Wernovsky G, Gaynor JW. Cause and Prevention of Central Nervous System Injury in Neonates Undergoing Cardiac Surgery. Semin Thorac Cardiovasc Surg 2007; 19:269-77. [DOI: 10.1053/j.semtcvs.2007.07.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2007] [Indexed: 11/11/2022]
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Miura T, Sakamoto T, Kobayashi M, Shin'oka T, Kurosawa H. Hemodilutional anemia impairs neurologic outcome after cardiopulmonary bypass in a piglet model. J Thorac Cardiovasc Surg 2007; 133:29-36. [PMID: 17198777 DOI: 10.1016/j.jtcvs.2006.08.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2006] [Revised: 08/12/2006] [Accepted: 08/28/2006] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The effect of hemodilution on neurologic outcome after cardiopulmonary bypass remains unclear. We studied the influences of hematocrit on cerebral oxygenation and neuropathologic outcome in a piglet model. METHODS Eleven piglets (9.3 +/- 1.1 kg) were randomized into 2 groups. Five piglets (group H) received a total blood prime resulting in a high hematocrit (33.0% +/- 2.3%), and 6 piglets (group L) received a crystalloid prime resulting in a low hematocrit (14.0% +/- 3.2%). Both groups underwent 90 minutes of moderate hypothermic cardiopulmonary bypass (28 degrees C) with alpha-stat strategy. Cerebral oxygenation was monitored by near-infrared spectroscopy. Group L received a blood transfusion immediately after cardiopulmonary bypass to reach the postoperative target hematocrit of 30%. The brain was fixed in situ 6 hours after weaning from cardiopulmonary bypass, and a histologic score for neurologic injury was assessed. RESULTS There were no significant differences in arterial blood gas analyses throughout the experiment between the groups. Mean arterial pressure, mixed venous oxygen saturation, and heart rate were significantly higher in group H compared with group L during hypothermia. Oxyhemoglobin and total hemoglobin signals detected by near-infrared spectroscopy were significantly lower in group L (analysis of variance, P < .0001), although the tissue oxygenation index was not different during cardiopulmonary bypass. Group L showed a poorer histologic score compared with group H (P = .0071). CONCLUSIONS Excessive hemodilution, such as a hematocrit of less than 15%, may be associated with a high incidence of neurologic injury. Further studies are required to determine the safety limits of hematocrit during pediatric cardiopulmonary bypass.
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Abstract
PURPOSE OF REVIEW As surgical survival in children with congenital heart disease, particularly those with univentricular hearts, has improved in recent years, focus has shifted to reducing the morbidity of congenital cardiac malformations and their treatment. This review will focus on emerging therapies aimed at reducing these morbidities in the intensive care unit. RECENT FINDINGS A protracted stay in the intensive care unit after cardiac surgery is a risk factor for developing various morbidities. Therapies or interventions that may hasten postoperative recovery and minimize the length of stay are thus important to evaluate. Fluid overload, renal dysfunction, low cardiac output and neurological dysfunction remain major contributors to morbidity after cardiac surgery. In addition, the treatment of these adverse states can potentially compound the injury. SUMMARY The reduction in morbidity after cardiac surgery remains challenging. Recent insights have allowed us to recognize the impact of factors beyond the intraoperative period as significant contributors to morbidity. As our field continues to evolve, future studies should focus on emerging technologies and therapies that facilitate the prevention of physiological states that compound congenital morbidities.
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Affiliation(s)
- David S Cooper
- The Congenital Heart Institute of Florida, Cardiac Intensive Care Unit, All Children's Hospital, University of South Florida, St Petersburg, FL 33701, USA.
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Abstract
Neurological complications during critical illness remain a frequent cause of morbidity and mortality. To date, monitors of cerebral function including electroencephalography, jugular bulb mixed venous oxygen saturation and transcranial Doppler, either require an invasive procedure and/or are not sensitive enough to effectively identify patients at risk for cerebral hypoxia. Near-infrared spectroscopy is a noninvasive device that uses infrared light, a technique similar to pulse oximetry, to penetrate living tissue and estimate brain tissue oxygenation by measuring the absorption of infrared light by tissue chromophores. The following article reviews the latest technology available to monitor cerebral oxygenation, near-infrared spectroscopy, its advantages and disadvantages, the currently available evidence-based medicine that demonstrates that this technology can identify deficits in cerebral oxygenation, and that monitoring such deficits allows for therapy to reverse cerebral oxygenation issues and thereby prevent long-term neurological sequelae.
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Affiliation(s)
- Joseph D Tobias
- Department of Anesthesiology, University of Missouri, Columbia, MO 65212, USA.
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Davies LK, Janelle GM. Con: All Cardiac Surgical Patients Should Not Have Intraoperative Cerebral Oxygenation Monitoring. J Cardiothorac Vasc Anesth 2006; 20:450-5. [PMID: 16750752 DOI: 10.1053/j.jvca.2006.03.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Indexed: 11/11/2022]
Affiliation(s)
- Laurie K Davies
- Department of Anesthesiology, Box 100254, 1600 SW Archer Road, University of Florida, Gainesville, 32610, USA.
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Pacini D, Di Marco L, Di Bartolomeo R. Methods of cerebral protection in surgery of the thoracic aorta. Expert Rev Cardiovasc Ther 2005; 4:71-82. [PMID: 16375630 DOI: 10.1586/14779072.4.1.71] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
During the last decade, a considerable increase in the number of operations on the thoracic aorta has been observed. Although patient's outcomes have improved considerably, this surgery is still associated with significant morbidity and mortality due to neurological complications. Various methods have been proposed and widely used as means to protect the brain from ischemic damage. This review summarizes the principal methods of cerebral protection, describes the advantages and disadvantages of each method and their impact on patient outcomes, and discusses the different surgical techniques proposed to minimize the risk of cerebral injuries.
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Affiliation(s)
- Davide Pacini
- Unità Operativa di Cardiochirurgia, Università degli Studi di Bologna, Policlinico S.Orsola, Via Massarenti, 940138 Bologna, Italy.
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Hanley FL. Religion, politics…deep hypothermic circulatory arrest. J Thorac Cardiovasc Surg 2005; 130:1236. [PMID: 16256773 DOI: 10.1016/j.jtcvs.2005.07.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2005] [Revised: 07/01/2005] [Accepted: 07/29/2005] [Indexed: 11/23/2022]
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Hoffman GM, Mussatto KA, Brosig CL, Ghanayem NS, Musa N, Fedderly RT, Jaquiss RDB, Tweddell JS. Systemic venous oxygen saturation after the Norwood procedure and childhood neurodevelopmental outcome. J Thorac Cardiovasc Surg 2005; 130:1094-100. [PMID: 16214525 DOI: 10.1016/j.jtcvs.2005.06.029] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2005] [Revised: 06/16/2005] [Accepted: 06/28/2005] [Indexed: 10/25/2022]
Abstract
OBJECTIVE Neonates with hypoplastic left heart syndrome have impaired systemic oxygen delivery and also have a high risk of hypoxic ischemic brain injury with resultant neurodevelopmental impairment. We hypothesized that decreased postoperative oxygen delivery, as measured on the basis of systemic venous oxyhemoglobin saturation, would be related to persistent neurodevelopmental abnormality assessed in childhood. METHODS Early perioperative hemodynamic data, prospectively acquired from neonates undergoing staged palliation of hypoplastic left heart syndrome by using deep hypothermic circulatory arrest with uniform perioperative management, were tested for relationship to later neurodevelopmental outcome assessed at age 4 years. RESULTS Complete hemodynamic and neurodevelopmental data were available in 13 patients aged 7 +/- 8 days at the time of the Norwood procedure and aged 4.5 +/- 0.7 years at follow-up assessment. The subjects scored significantly below the population mean for motor, visual-motor integration, and composite neurodevelopmental outcomes. The 5 (38%) patients with abnormal outcomes had significantly lower postoperative systemic venous oxygen saturation values than those with normal outcomes (46% +/- 8% vs 56% +/- 6%, P = .024). Standard hemodynamic parameters did not differentiate patient outcomes. The risk of abnormal outcome increased with increasing time at a systemic venous oxygen saturation of less than 40% (P < .001). A multivariate model of deep hypothermic circulatory arrest time, systemic venous oxygen saturation, blood pressure, and carbon dioxide tension accounted for 79% of the observed variance (P < .001). CONCLUSIONS Decreased systemic oxygen delivery in the neonatal postoperative period is associated with hypoxic-ischemic brain injury and childhood neurodevelopmental abnormality. Measures of systemic oxygen delivery should be used to guide perioperative strategies to reduce the risk of hypoxic-ischemic brain injury.
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Affiliation(s)
- George M Hoffman
- Department of Pediatric Anesthesiology, Medical College of Wisconsin, Milwaukee, Wis, USA.
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Dahlbacka S, Heikkinen J, Kaakinen T, Laurila P, Vainionpää V, Kiviluoma K, Salomäki T, Tuominen H, Ohtonen P, Biancari F, Lepola P, Juvonen T. pH-Stat Versus α-Stat Acid–Base Management Strategy During Hypothermic Circulatory Arrest Combined With Embolic Brain Injury. Ann Thorac Surg 2005; 79:1316-25. [PMID: 15797070 DOI: 10.1016/j.athoracsur.2004.09.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/07/2004] [Indexed: 11/23/2022]
Abstract
BACKGROUND There is some evidence of beneficial metabolic effects associated with the pH-stat than with alpha-stat perfusion strategy, but this is tempered by a likely increased risk of embolism to the brain, especially in adult patients. We investigated this possible adverse effect in an experimental model that combined hypothermic circulatory arrest (HCA) and embolic brain injury. METHODS Twenty-four female juvenile pigs undergoing 25 minutes of HCA at a brain temperature of 18 degrees C were assigned to either alpha-stat (n = 12) or pH-stat (n = 12) strategy during cardiopulmonary bypass. Before the initiation of HCA, the descending aorta was clamped and 200 mg of albumin-coated polystyrene microspheres (250 to 750 microm in diameter) were injected into the isolated aortic arch in both groups. RESULTS The 7-day survival rate was 75% in the pH-stat group and 50% in the alpha-stat group (p = 0.40). The pH-stat group had significantly better behavioral scores on postoperative days 5 (p = 0.03) and 6 (p = 0.04). The pH-stat strategy was associated with better postoperative intracranial pressures and histopathologic scores, but such differences did not reach statistical significance. The alpha-stat group had lower brain glucose concentrations postoperatively as well as higher brain lactate/glucose and lactate/pyruvate ratios CONCLUSIONS These results suggest that pH-stat strategy does not cause any worse brain injury than the alpha-stat strategy. Indeed, the pH-stat strategy is associated with a slightly better outcome compared with the alpha-stat strategy, even in the setting of cerebral embolization. This observation suggests that the pH-stat strategy could also be used in adults during deep hypothermic cardiopulmonary bypass despite the increased risk of intraoperative cerebral embolization.
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Affiliation(s)
- Sebastian Dahlbacka
- Department of Surgery, Oulu University Hospital, University of Oulu, Oulu, Finland
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Yoshioka Y, Oikawa H, Ehara S, Inoue T, Ogawa A, Kanbara Y, Kubokawa M. Noninvasive measurement of temperature and fractional dissociation of imidazole in human lower leg muscles using 1H-nuclear magnetic resonance spectroscopy. J Appl Physiol (1985) 2005; 98:282-7. [PMID: 15448119 DOI: 10.1152/japplphysiol.00437.2004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The temperature change of the fractional dissociation of imidazole (α-imidazole) in resting human lower leg muscles was measured noninvasively using 1H-nuclear magnetic resonance spectroscopy at 3.0 and 1.5 T on five normal male volunteers aged 30.6 ± 10.4 yr (mean ± SD). Using 1H-nuclear magnetic resonance spectroscopy, water, carnosine, and creatine in the muscles could be simultaneously analyzed. Carnosine contains imidazole protons. The chemical shifts of water and carnosine imidazole protons relative to creatine could be used for estimating temperatures and α-imidazole, respectively. Using the chemical shift, the values of temperature in gastrocnemius (Gast) and soleus muscles at ambient temperature (21–25°C) were estimated to be 35.5 ± 0.5 and 37.4 ± 0.6°C (means ± SE), respectively (significantly different; P < 0.01). The estimated values of α-imidazole in these muscles were 0.620 ± 0.007 and 0.630 ± 0.013 (means ± SE), respectively (not significant). Alternation of the surface temperature of the lower leg from 40 to 10°C significantly changed the temperature in Gast ( P < 0.0001) from 38.1 ± 0.5 to 28.0 ± 1.2°C, and the α-imidazole in Gast decreased from 0.631 ± 0.003 to 0.580 ± 0.011 ( P < 0.05). However, the values of α-imidazole and the temperature in soleus muscles were not significantly affected by this maneuver. These results indicate that the α-imidazole in Gast changed significantly with alternation in muscle temperature ( r = 0.877, P < 0.00001), and its change was estimated to be 0.0058/°C.
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Affiliation(s)
- Yoshichika Yoshioka
- Dept. of Physiology II, School of Medicine, Iwate Medical University, Morioka 020-8505, Japan.
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Himmelseher S, Werner C. Therapeutische Hypothermie nach Sch�del-Hirn-Trauma oder Subarachnoidalblutung. Anaesthesist 2004; 53:1168-76. [PMID: 15597156 DOI: 10.1007/s00101-004-0778-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND We aimed to explore current practices in use of therapeutic hypothermia after traumatic brain injury (TBI) or subarachnoid hemorrhage (SAH) in intensive care of adults. METHODS Questionnaires were sent to anaesthesia department chairs in German hospitals with neurosurgical care in January 2004 with a survey focussing on cooling procedures, temperature measurement, depth and duration of hypothermia, and rewarming after therapy. RESULTS 99 (67%) questionnaires on TBI and 95 (64%) on SAH could be analysed. Hypothermia was used in 39% after TBI and 18% after SAH. Its aims were neuroprotection in approximately 45% and control of refractory intracranial hypertension in approximately 50%. However, in most cases (69% TBI, 59% SAH) hypothermia was used in less than a quarter of patients treated. A criterion for hypothermia was severe disease in approximately 40% and refractory intracranial hypertension in approximately 50%. Temperatures were targeted to 36-34 degrees C in 77% after TBI and 88% after SAH. In more than 80%, bladder temperatures were measured. For induction of hypothermia, surface cooling was applied in approximately 90%. The duration of hypothermia was 24-48 h in 62% after TBI and 29% after SAH. Cooling was orientated at the intracranial pressure (ICP) in 31% after TBI and 47% after SAH, and was used for more than 48 h in approximately 25%. After hypothermia was stopped, a rewarming rate of 0.5 degrees C/h was applied in 38% after TBI and 53% after SAH. In approximately 35%, rewarming was orientated at the ICP, and in 33% after TBI and 24% after SAH, it was performed over 24 h. After SAH, spontaneous rewarming was used in 24%. CONCLUSION Therapeutic hypothermia is used in 39% after TBI and 18% after SAH in the intensive care of German anaesthesia departments. There is no standard in management, and there is wide variation in practices of duration of cooling and rewarming. For patients' benefit, evidence-based recommendations on therapeutic hypothermia should be published by the appropriate medical societies in the German language.
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Affiliation(s)
- S Himmelseher
- Klinik für Anaesthesiologie, Klinikum rechts der Isar, Technische Universität München, München.
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Abstract
The incidence of neurological complications after pediatric cardiac surgery ranges from 2% to 25%. The causes are multifactorial and include preoperative brain malformations, perioperative hypoxemia and low cardiac output states, sequelae of cardiopulmonary bypass, and deep hypothermic circulatory arrest. Neurological monitoring devices are readily available and the anesthesiologist can now monitor the brain during pediatric cardiac surgery. In this review we discuss near-infrared cerebral oximetry, transcranial Doppler ultrasound, and electroencephalographic monitors for use during congenital heart surgery. After review of the basic principles of each monitoring modality, we discuss their uses during pediatric heart surgery. We present evidence that multimodal neurological monitoring in conjunction with a treatment algorithm may improve neurological outcome for patients undergoing congenital heart surgery and present one such algorithm.
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Affiliation(s)
- Dean B Andropoulos
- Department of Pediatric Cardiovascular Anesthesiology, Texas Children's Hospital, Departments of Anesthesiology and Pediatrics, Baylor College of Medicine, Houston Texas, Department of Pediatric Cardiac Anesthesiology, Lucile Packard Children's Hospital at Stanford, Department of Anesthesiology, Stanford University School of Medicine, Stanford, California
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