Thoracic epidural anesthesia in cardiac surgical patients: A prospective audit of 2,113 cases

Practice Advisory for Preoperative and Intraoperative Pain Management of Cardiac Surgical Patients: Part 2

Pain after cardiac surgery is of moderate to severe intensity, which increases postoperative distress and health care costs, and affects functional recovery. Opioids have been central agents in treating pain after cardiac surgery for decades. The use of multimodal analgesic strategies can promote effective postoperative pain control and help mitigate opioid exposure. This Practice Advisory is part of a series developed by the Society of Cardiovascular Anesthesiologists (SCA) Quality, Safety, and Leadership (QSL) Committee's Opioid Working Group. It is a systematic review of existing literature for various interventions related to the preoperative and intraoperative pain management of cardiac surgical patients. This Practice Advisory provides recommendations for providers caring for patients undergoing cardiac surgery. This entails developing customized pain management strategies for patients, including preoperative patient evaluation, pain management, and opioid use-focused education as well as perioperative use of multimodal analgesics and regional techniques for various cardiac surgical procedures. The literature related to this field is emerging, and future studies will provide additional guidance on ways to improve clinically meaningful patient outcomes.

Current Status of Neuraxial and Paravertebral Blocks for Adult Cardiac Surgery

Cardiac surgeries are known to produce moderate to severe pain. Pain management has traditionally been based on intravenous opioids. Poorly controlled pain can result in increased incidence of respiratory complications such as atelectasis and pneumonia leading to prolonged intubation and intensive care unit length of stay and subsequent prolonged hospital stay. Adequate perioperative analgesia improves hemodynamics and immunologic responses, which would result in better outcomes after cardiac surgery. Opioid sparing "Enhanced Recovery After Surgery" protocols are increasingly being incorporated into cardiac surgeries. This will reduce opioid requirements and opioid-related side effects and facilitate fast-tracking of patients. Regional analgesia can be provided by neuraxial blocks, fascial plane blocks, peripheral nerve blocks, or simply by the infiltration of the wound with local anesthetics for cardiac surgery. Neuraxial analgesia is provided through epidural, spinal, and paravertebral routes. Though they are being replaced by peripheral fascial plane blocks, epidural and spinal analgesia are still being used in some centers. In this article, neuraxial forms of analgesia are focused. We sought to review epidural analgesia and its impact in suppressing hemodynamic stress response, reducing pulmonary complications, and development of chronic pain. The relationship between intraoperative heparinization and potential neuraxial hematoma is discussed. Other neuraxial options such as spinal and paravertebral analgesia and their usefulness, benefits, and limitations are also reviewed.

Fast Tracking in Off Pump CABG with Supraglottic Airway and TIVA

The standard goals of anesthetic management for an off pump coronary artery bypass (OPCAB) surgery are that it should be safe, provide cardiac and other organ protection and stability, preserve neurocognitive integrity, maintain hemodynamics, allow early emergence and ambulation, and offer pain relief in the postoperative period. The cardiac surgical team should collaborate and plan the best preoperative strategy, so as to provide optimal care and a rapid and expeditious recovery of these patients. Scientific evidence and practical experience make total intravenous anesthesia (TIVA) the recommended choice for cardiac surgery. Use of endotracheal tube (ETT) is associated with certain drawbacks which can be overcome with judicious use of ProSeal laryngeal mask airway (PLMA) for cardiac surgeries too. The core principles of ultrafast track anesthetic (UFTA) technique are choice and titration of short-acting anesthetic drugs, postoperative normothermia, multimodal analgesia, early extubation, ambulation, and discharge. Fast tracking with use of TIVA and PLMA in patients undergoing OPCAB at our center offers certain advantages over other techniques in terms of reduced airway and lung trauma, improved cardiac output and renal perfusion with spontaneous respiration, decreased stress and discomfort of ETT suctioning and weaning from ventilation, substantially reduced requirement of dosages of analgesics, anesthetics and opioids, resulting in better patient hemodynamics, alert and pain-free patient that are more amenable and cooperative for early feeds, postoperative chest physiotherapy and lung recruitment strategies, and early ambulation and discharge.

Procedural sedation and analgesia for percutaneous high-tech cardiac procedures

The interest in percutaneous high-tech cardiac procedures has increased in recent years together with its safety and efficacy. In fragile patients, procedural sedation and analgesia are used to perform most of the procedures. General anesthesia remains the technique of choice during the team learning curve and might be required in selected patients or in emergent situations. Despite the high costs of percutaneous high-tech cardiac procedures, the decrease in length of hospital stays, rate of intensive care admission and complications, balance the increase in devices costs. In fragile patients who undergo percutaneous high tech cardiac procedures, the primary role of the anesthesiologist is to prevent the need for postprocedural intensive care unit and complications rate. Starting from the experience of a large university third level hospital we identified the eight most commonly performed contemporary percutaneous high tech cardiac procedures (ventricular tachycardia and atrial fibrillation ablation, protected percutaneous coronary intervention, transcatheter aortic valve implantation, MitraClip® (Abbott Laboratories; Abbott Park, IL, USA), percutaneous patent foramen ovale closure, left atrial appendage closure, and dysfunctional lead extraction), discuss the role of procedural sedation and analgesia in this setting, and explore future perspectives.

Epidural analgesia for adults undergoing cardiac surgery with or without cardiopulmonary bypass

BACKGROUND

General anaesthesia combined with epidural analgesia may have a beneficial effect on clinical outcomes. However, use of epidural analgesia for cardiac surgery is controversial due to a theoretical increased risk of epidural haematoma associated with systemic heparinization. This review was published in 2013, and it was updated in 2019.

OBJECTIVES

To determine the impact of perioperative epidural analgesia in adults undergoing cardiac surgery, with or without cardiopulmonary bypass, on perioperative mortality and cardiac, pulmonary, or neurological morbidity.

SEARCH METHODS

We searched CENTRAL, MEDLINE, and Embase in November 2018, and two trial registers up to February 2019, together with references and relevant conference abstracts.

SELECTION CRITERIA

We included all randomized controlled trials (RCTs) including adults undergoing any type of cardiac surgery under general anaesthesia and comparing epidural analgesia versus another modality of postoperative pain treatment. The primary outcome was mortality.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures as expected by Cochrane.

MAIN RESULTS

We included 69 trials with 4860 participants: 2404 given epidural analgesia and 2456 receiving comparators (systemic analgesia, peripheral nerve block, intrapleural analgesia, or wound infiltration). The mean (or median) age of participants varied between 43.5 years and 74.6 years. Surgeries performed were coronary artery bypass grafting or valvular procedures and surgeries for congenital heart disease. We judged that no trials were at low risk of bias for all domains, and that all trials were at unclear/high risk of bias for blinding of participants and personnel taking care of study participants.Epidural analgesia versus systemic analgesiaTrials show there may be no difference in mortality at 0 to 30 days (risk difference (RD) 0.00, 95% confidence interval (CI) -0.01 to 0.01; 38 trials with 3418 participants; low-quality evidence), and there may be a reduction in myocardial infarction at 0 to 30 days (RD -0.01, 95% CI -0.02 to 0.00; 26 trials with 2713 participants; low-quality evidence). Epidural analgesia may reduce the risk of 0 to 30 days respiratory depression (RD -0.03, 95% CI -0.05 to -0.01; 21 trials with 1736 participants; low-quality evidence). There is probably little or no difference in risk of pneumonia at 0 to 30 days (RD -0.03, 95% CI -0.07 to 0.01; 10 trials with 1107 participants; moderate-quality evidence), and epidural analgesia probably reduces the risk of atrial fibrillation or atrial flutter at 0 to 2 weeks (RD -0.06, 95% CI -0.10 to -0.01; 18 trials with 2431 participants; moderate-quality evidence). There may be no difference in cerebrovascular accidents at 0 to 30 days (RD -0.00, 95% CI -0.01 to 0.01; 18 trials with 2232 participants; very low-quality evidence), and none of the included trials reported any epidural haematoma events at 0 to 30 days (53 trials with 3982 participants; low-quality evidence). Epidural analgesia probably reduces the duration of tracheal intubation by the equivalent of 2.4 hours (standardized mean difference (SMD) -0.78, 95% CI -1.01 to -0.55; 40 trials with 3353 participants; moderate-quality evidence). Epidural analgesia reduces pain at rest and on movement up to 72 hours after surgery. At six to eight hours, researchers noted a reduction in pain, equivalent to a reduction of 1 point on a 0 to 10 pain scale (SMD -1.35, 95% CI -1.98 to -0.72; 10 trials with 502 participants; moderate-quality evidence). Epidural analgesia may increase risk of hypotension (RD 0.21, 95% CI 0.09 to 0.33; 17 trials with 870 participants; low-quality evidence) but may make little or no difference in the need for infusion of inotropics or vasopressors (RD 0.00, 95% CI -0.06 to 0.07; 23 trials with 1821 participants; low-quality evidence).Epidural analgesia versus other comparatorsFewer studies compared epidural analgesia versus peripheral nerve blocks (four studies), intrapleural analgesia (one study), and wound infiltration (one study). Investigators provided no data for pulmonary complications, atrial fibrillation or flutter, or for any of the comparisons. When reported, other outcomes for these comparisons (mortality, myocardial infarction, neurological complications, duration of tracheal intubation, pain, and haemodynamic support) were uncertain due to the small numbers of trials and participants.

AUTHORS' CONCLUSIONS

Compared with systemic analgesia, epidural analgesia may reduce the risk of myocardial infarction, respiratory depression, and atrial fibrillation/atrial flutter, as well as the duration of tracheal intubation and pain, in adults undergoing cardiac surgery. There may be little or no difference in mortality, pneumonia, and epidural haematoma, and effects on cerebrovascular accident are uncertain. Evidence is insufficient to show the effects of epidural analgesia compared with peripheral nerve blocks, intrapleural analgesia, or wound infiltration.

High Thoracic Epidural Analgesia for Cardiac Surgery: An Audit of 874 Cases

Despite clinical use for over 10 years, high thoracic epidural analgesia for cardiac surgery remains controversial, due to a perceived increased risk of epidural haematoma resulting from anticoagulation for cardiac pulmonary bypass. There are no sufficiently large randomised studies to address this question and few large case series reported. For this reason, we conducted an audit of neurological complications related to high thoracic epidural analgesia during cardiac surgery in our institution between 1998 and end 2005. During this period 874 patients received epidural analgesia. There were no neurological complications attributable to epidural use. Our findings suggest that major neurological complications related to high thoracic epidural use during cardiac surgery are rare.

Pulmonary hypertension and cardiac anesthesia: Anesthesiologist's perspective

Perioperative management of pulmonary hypertension remains one of the most challenging scenarios during cardiac surgery. It is associated with high morbidity and mortality due to right ventricular failure, arrhythmias, myocardial ischemia, and intractable hypoxia. Therefore, this review article is intended toward the anesthetic considerations in the perioperative period, with particular emphasis on the selection of technique and choice of anesthesia with maintenance, anesthetic drugs, and the recent intraoperative recommendations for prevention and treatment of pulmonary hypertensive crisis.

History of Cardiac Anesthesia in India

Before the 19th century, the heart was considered as a "no-go" area, although minor and superficial procedures were performed in the early 1800s. It was only in the later part of the century that surgical repair of the wounds of the cardiac chambers was attempted. Cardiac surgery came to India in the mid-20th century and the operations performed were minor and extracardiac. Initially, the surgeries were performed at a select few centers located at Mumbai, Vellore, Delhi, Chennai, and Kolkata. The anesthesiologists of an earlier era in India worked with limited facilities, and with their interest and devotion contributed immensely to the growth of the specialty of cardiac anesthesia. The progress was somewhat modest until the 1980s, when it started increasing rapidly and India caught up with the Western world by the turn of century. The progress was seen not only in the clinical field, but also in technology, teaching, and academic fields. This article presents an account of the progress in the field of cardiac anesthesia in India, and highlights the contribution of some of the dedicated anesthesiologists because of whom the specialty has reached the present stature.

Comparison of Perioperative Thoracic Epidural Fentanyl with Bupivacaine and Intravenous Fentanyl for Analgesia in Patients Undergoing Coronary Artery Bypass Grafting Surgery

CONTEXT

Two-thirds of patients undergoing coronary artery bypass grafting (CABG) surgery report moderate to severe pain, particularly with ambulatory or respiratory effort.

AIMS

The aim of this study is to compare the analgesic effect of perioperative thoracic epidural fentanyl with bupivacaine and intravenous fentanyl in patients undergoing CABG surgery.

SETTINGS AND DESIGN

The study was a prospective, randomized, nonblinded comparative study.

MATERIALS AND METHODS

A total of 60 patients coming under the American Society of Anesthesiologists Class III who were posted for CABG surgery were recruited in this study. The patients were randomized into one of two groups, higher thoracic epidural analgesia (HTEA) group receiving general anesthesia with thoracic epidural analgesia (TEA) in the postoperative period, and intravenous fentanyl analgesia group receiving general anesthesia with fentanyl infusion in the postoperative period. The pain was assessed at 4 h after extubation when the patient was fully awake, then at 8, 12, 18, and 24 h. Both groups received intravenous tramadol 100 mg as rescue analgesia whenever visual analog scale score was 5 and above. Heart rate, mean arterial pressure (MAP), sedation scores, and physiotherapy cooperation were also assessed.

STATISTICAL ANALYSIS USED

The numerical data were analyzed using an independent t-test, repeated-measures ANOVA, and Mann-Whitney U-test.

RESULTS

Pain at rest and on cough was significantly lower in HTEA patients as compared to control group. Patients HTEA group got less frequent rescue analgesia than the control group. Physiotherapy cooperation was significantly better in HTEA patients at 4, 12, and 24 h postextubation. They also had significantly lower heart rate, MAP, and sedation scores.

CONCLUSION

Perioperative TEA using fentanyl with bupivacaine provided optimal postoperative analgesia at rest and during coughing in patients following CABG surgery as compared to postoperative analgesia with intravenous fentanyl. It also resulted in optimal postoperative hemodynamic status, good cooperation to chest physiotherapy with less sedation.

Nationwide incidence of serious complications of epidural analgesia in the United States

BACKGROUND

This study aimed to describe the incidence and risk factors of in-hospital spinal hematoma and abscess associated with epidural analgesia in adult obstetric and non-obstetric populations in the United States.

METHODS

The Nationwide Inpatient Sample was analyzed to identify patients receiving epidural analgesia from 1998 to 2010. Primary outcomes were incidence of spinal hematoma and epidural abscess. Use of decompressive laminectomy was also investigated. Regression analyses were conducted to assess predictors of epidural analgesia complications. Differences in mortality and disposition of patients at discharge were compared in patients with and without neuraxial complications. Obstetric and non-obstetric patients were studied separately.

RESULTS

A total of 3,703,755 epidural analgesia procedures (2,320,950 obstetric and 1,382,805 non-obstetric) were identified. In obstetric patients, the incidence of spinal hematoma was 0.6 per 100,000 epidural catheterizations (95% CI, 0.3 to 1.0 × 10(-5) ). The incidence of epidural abscess was zero. In non-obstetric patients, the incidence of spinal hematoma and epidural abscess were, respectively, 18.5 per 100,000 (95% CI, 16.3 to 20.9 × 10(-5) ) and 7.2 per 100,000 (95% CI, 5.8 to 8.7 × 10(-5) ) catheterizations. Predictors of spinal hematoma included type of surgical procedure (higher in vascular surgery), teaching status of hospital, and comorbidity score. Patients with spinal complications had higher in-hospital mortality (12.2% vs. 1.1%, P < 0.0001) and were significantly less likely to be discharged to home.

CONCLUSIONS

This large nationwide data analysis reveals that the incidence of epidural analgesia-related complications is very low in obstetric population epidural analgesia and much higher in patients having vascular surgery.

A Review of Current Analgesic Techniques in Cardiac Surgery. Is Epidural Worth it?

In this review we addressed the various analgesic techniques in cardiac surgery, especially regional methods such as thoracic epidural anesthesia (TEA). There are many techniques available for management of postoperative pain after cardiac operation including intravenous administration of analgesic drugs, infiltration of local anesthetics, nerve blocks, and neuroaxial techniques. Although there are many evidences declaring the benefits of neuroaxial blockade in improving postoperative well-being and quality of care in these patients, some studies have revealed limited effect of TEA on overall morbidity and mortality after cardiac surgery. On the other hand, some investigators have raised the concern about epidural hematoma in altered coagulation and risks of infection and local anesthetics toxicity during and after cardiac procedures. In present review, we tried to discuss the most recent arguments in the field of this controversial issue. The final conclusion about either using regional anesthesia in cardiac surgery or not has been assigned to the readers.

High Thoracic Epidural in Cardiac Anesthesia

High thoracic epidural analgesia (HTEA) offers a distinctive opportunity to enhance postoperative recovery for the thoracic surgery patient. In the modern hospital setting with day of admission surgery, the logistics of insertion of the epidural catheter has become increasingly difficult. The greatest limitation to its use might be the believed increased risk of epidural hematoma associated with anticoagulation during cardiopulmonary bypass. The aim of this review is to give an overview of complications and effect on outcomes with focus on cardiac performance and postoperative glycemic control and kidney function. Patients with epidurals may have improved postoperative pulmonary function and shorter ventilation time, while impact on length of stay in the intensive care unit and hospital is not as evident. HTEA is effective in pain management, attenuates perioperative stress and seems to improve postoperative blood glucose control. Whether HTEA improves recovery and facilitates fast-track is still to be confirmed. With regard to serious postoperative complications, there is evidence of reduction in supraventricular arrhythmias and lower frequency of postoperative acute kidney injury and dialysis. There are some indications of lower short term mortality and frequency of postoperative myocardial infarctions, but only as a combined outcome. The present short-term mortality of 1% to 2% should be compared with the most pessimistic frequency of epidural hematoma being 1 in 4600 patients.

Epidural analgesia in cardiac surgery: an updated risk assessment

INTRODUCTION

The use of epidural anesthesia carries risks that have been known for 50 years. The debate about the use of locoregional technique in cardiac anesthesia continues. The objective of this report is to estimate the risks and their variability of a catheter-related epidural hematoma in cardiac surgery patients and to compare it with other anesthetic and medical procedures.

METHODS

Case series reporting the use of epidural anesthesia in cardiac surgery were researched through Medline. Additional references were retrieved from the bibliography of published articles and from the internet. Risks of complications in other anesthetic and medical activity were retrieved from recent reviews.

RESULTS

Based on the present evidence, the risk of epidural hematoma in cardiac surgery is 1:12,000 (95% CI of 1:2100 to 1:68,000), which is comparable to the risk in the nonobstetrical population of 1:10,000 (95% CI 1:6700 to 1:14,900). The risk of epidural hematoma is comparable to the risk of receiving a wrong blood product or the yearly risk of having a fatal road accident in Western countries.

CONCLUSIONS

The risk of a hematoma after epidural in cardiac surgery is comparable to other nonobstetrical surgical procedures. Its routine application in a controlled setting should be encouraged.

Incidence of epidural haematoma and neurological injury in cardiovascular patients with epidural analgesia/anaesthesia: systematic review and meta-analysis

Background

Epidural anaesthesia is used extensively for cardiothoracic and vascular surgery in some centres, but not in others, with argument over the safety of the technique in patients who are usually extensively anticoagulated before, during, and after surgery. The principle concern is bleeding in the epidural space, leading to transient or persistent neurological problems.

Methods

We performed an extensive systematic review to find published cohorts of use of epidural catheters during vascular, cardiac, and thoracic surgery, using electronic searching, hand searching, and reference lists of retrieved articles.

Results

Twelve studies included 14,105 patients, of whom 5,026 (36%) had vascular surgery, 4,971 (35%) cardiac surgery, and 4,108 (29%) thoracic surgery. There were no cases of epidural haematoma, giving maximum risks following epidural anaesthesia in cardiac, thoracic, and vascular surgery of 1 in 1,700, 1 in 1,400 and 1 in 1,700 respectively. In all these surgery types combined the maximum expected rate would be 1 in 4,700. In all these patients combined there were eight cases of transient neurological injury, a rate of 1 in 1,700 (95% confidence interval 1 in 3,300 to 1 in 850). There were no cases of persistent neurological injury (maximum expected rate 1 in 4,600).

Conclusion

These estimates for cardiothoracic epidural anaesthesia should be the worst case. Limitations are inadequate denominators for different types of surgery in anticoagulated cardiothoracic or vascular patients more at risk of bleeding.

Awake cardiac surgery using a novel anesthetic technique

PURPOSE

We describe the first published cases of awake cardiac surgery in Canada. In addition, a novel anesthetic technique consisting of combined femoral block/high epidural thoracic anesthesia is presented.

CLINICAL FEATURES

Two patients, both 65 yr of age and with good left ventricular function, were scheduled to undergo off-pump coronary artery bypass grafting (OPCAB) for two grafts each. Anesthesia consisted of combined femoral 3:1 block and high thoracic epidural anesthesia. Both surgeries proceeded without hemodynamic or respiratory complications; in both cases, opening of the pleural spaces was treated with insertion of thoracic drainage tubes. Both patients were transferred to the postanesthesia care unit immediately after surgery and six hours later to the cardiac surgical ward. Both patients were discharged from the hospital within five days of surgery.

CONCLUSION

We conclude that awake OPCAB is feasible using a combined femoral block/high thoracic epidural anesthesia technique which allows cardiac surgery and harvesting of the saphenous vein. Further clinical experience is required to define the technical limitations of this technique before randomized studies should be undertaken to better define the role of awake procedures in the future of cardiac surgery.

Conscious Cardiac Surgery With Cardiopulmonary Bypass Using Thoracic Epidural Anesthesia Without Endotracheal General Anesthesia

OBJECTIVE

The purpose of this study was to evaluate the feasibility of thoracic epidural anesthesia as an alternative technique to general anesthesia in patients undergoing cardiac surgery under cardiopulmonary bypass.

DESIGN

A prospective study.

SETTING

Tertiary referral heart hospital.

PARTICIPANTS

Eleven patients underwent cardiac surgical procedures requiring cardiopulmonary bypass under thoracic epidural anesthesia from February to April 2004.

INTERVENTIONS

An epidural catheter was inserted at C7 to T2 intervertebral space on the day before the operation. Subsequently, cardiac surgery was performed using cardiopulmonary bypass.

MEASUREMENTS AND RESULTS

The midsternotomy approach was used in all the patients. Anticoagulation was achieved with 300 units/kg of heparin. Under normothermic cardiopulmonary bypass, 6 patients underwent closure of atrial septal defect, 3 underwent valve replacements, and 2 underwent coronary artery bypass surgery combined with valve replacements. Soon after establishing cardiopulmonary bypass, all but 1 patient developed apnea, which was reversed after termination of cardiopulmonary bypass. The mean cardiopulmonary bypass time was 102 +/- 28 minutes, the aortic cross-clamp time was 58 +/- 28 minutes, and the total duration of surgery was 229 +/- 64 minutes. There was no mortality or morbidity in this series.

CONCLUSION

Cardiac surgical procedures requiring cardiopulmonary bypass may be performed under thoracic epidural anesthesia, without endotracheal general anesthesia.