The effect of alcohol abuse and alcohol withdrawal on short-term outcomes and cost of care after head and neck cancer surgery

Impact of Preemptive Postoperative Pressure Support Ventilation and Physiotherapy on Postoperative Pulmonary Complications after Major Cervicofacial Cancer Surgery: A before and after Study

Introduction: Complex cervicofacial cancer surgery with free flap reconstruction is known to have a high incidence of postoperative pulmonary complications (PPCs). We hypothesized that by implementing an optimized respiratory protocol, including preemptive postoperative pressure support ventilation, physiotherapy, and critical respiratory support and follow-up, we could decrease the incidence of PPCs. Patients and methods: We evaluated the incidence of PPCs over two periods in two groups of patients having a routine or optimized postoperative respiratory protocol: 156 adult patients undergoing major cervicofacial cancer surgery were assessed; 91 were in Group 1 (routine) and 65 were in Group 2 (optimized). In Group 1, no ventilatory support sessions were performed. The incidence of pulmonary complications in both groups was compared using a multivariate analysis. Mortality was also compared until one year postoperatively. Results: In Group 2 with an optimized protocol, the mean number of ventilatory support sessions was 3.7 ± 1 (minimum 2, maximum 6). The incidence of respiratory complications, which was 34% in Group 1 (routine), was reduced by 59% OR = 0.41 (0.16; 0.95), p = 0.043) to 21% for the optimized Group 2. No difference in mortality was found. Conclusions: The present retrospective study showed that using an optimized preemptive respiratory pressure support ventilation combined with physiotherapy after a major cervicofacial surgery could possibly help reduce the incidence of pulmonary complications. Prospective studies are needed to verify these findings.

Alcohol Biomarker Phosphatidylethanol as a Predictor of the Severity of Alcohol Withdrawal Syndrome

AIMS

to investigate the relationship between phosphatidylethanol (PEth) and withdrawal severity in patients with alcohol use disorder (AUD).

METHODS

in 34 patients with AUD admitted for treatment of acute alcohol withdrawal, data were available for initial blood PEth concentrations and scores throughout detoxification of symptoms of withdrawal assessed by trained medical staff using the alcohol withdrawal syndrome (AWS)-scale, a validated scale consisting of 11 items in the alcohol withdrawal syndrome (two subscales with seven physiological and five psychological symptoms).

RESULTS

a significant positive correlation between PEth and the severity of alcohol withdrawal was found. When the sample was divided into two groups, according to whether or not AWS score at some point in the treatment reached 6 or more, the median PEth score was higher in those whose peak score had been 6 or more (score of 6 being the suggested cutoff to start medicating the withdrawal syndrome). Although there was a trend for some aspects of the clinical history to be more 'severe' in those with higher AWS, no differences reached significance.

CONCLUSION

blood PEth on admission could have a role in identifying patients at risk of more severe AWS.

Risk factors associated with early and late free flap complications in head and neck osseous reconstruction

PURPOSE

This study was designed to identify risk factors for post-operative complications in micro-anastomosed osteomyocutaneous free flaps (MOFF) and analyzed their consequences in long term.

METHODS

A retrospective review of 100 MOFF realized between May 2007 and October 2019 was performed. Demographic data, perioperative management and postoperative complications were enrolled and analyzed in a multivariate model. Patients were followed for ≥ 6 months.

RESULTS

Major surgical complication rate was 20% with 5% of overall free flap failure rate and 6% of anastomosis salvage surgery. Risk identified for major surgical complication was alcohol consumption (p = 0.0054). Minor surgical complications occurred in 26% of patients mostly due to infections (19%). No significant risk factor was associated to minor surgical complications. Major and minor medical complication rates were, respectively, 10% and 10%. Risk identified for major medical complication were age over 70 (p = 0.0253) and history of chemotherapy (p = 0.0277). Risk identified for minor medical complication were alcohol consumption p = 0.0232) and a history of radiotherapy (p = 0.0329).

CONCLUSIONS

Alcoholism is an independent risk factor for the surgical complication of MOFF that must be taken into account before surgery. Patients with a history of chemotherapy, radiotherapy or who are over 70 years of age are at greater risk of postoperative medical complications and require special attention.

Presentation and Outcomes of Otolaryngologic Surgeries in Patients With Mental Illness History

BACKGROUND

Describe the epidemiology and characteristics of patients with a history of mental illness undergoing otolaryngologic procedures.

METHODS

A retrospective cross-sectional analysis utilizing the Nationwide Readmissions Database, 2010 to 2015. The study sample included adult (≥18 years) patients undergoing otolaryngologic procedures.

RESULTS

A total of 146 182 patients were included, 18.3% with mental illness history. The prevalence of patients who required otolaryngologic surgeries with history of mental illness increased significantly from 14.9% in 2010 to 25.0% in 2015 (P < .001). Mental illness diagnoses included: depression (6.9%), anxiety (5.8%), alcohol dependence (4.2%), substance dependence (2.9%), bipolar disorder (1.4%), memory disorders (1.2%), delusional disorders (0.6%), self-harm (0.1%). Patients with a history of mental illness were more likely to be <65 years, female, and have multiple comorbidities (P < .05 each). Patients with history of mental illness had a higher risk of complications [OR:1.59, 95% CI:1.50,1.69, P < .001].

CONCLUSIONS

Patients with a history of mental illness are increasingly encountered in otolaryngology service. This study provides an epidemiological perspective that warrants increasing clinical investigation of this subpopulation.

Exposure to alcohol and overall survival in head and neck cancer: A regional cohort study

Background

There is a paucity of knowledge regarding the association of alcohol use with overall survival (OS) of patients with head and neck squamous cell carcinoma (HNSCC).

Methods

All 1033 patients treated for new HNSCC in Southwest Finland regional referral center of Turku University Hospital in 2005–2015. Cox regression analysis was used. Tumor TNM classification, age at baseline and tobacco smoking status were assessed as potential confounders.

Results

A history of severe harmful alcohol use with major somatic complications (HR: 1.41; 95%CI: 1.06–1.87; p = 0.017) as well as current use of at least 10 units per week (HR: 1.44, 95%CI: 1.16–1.78; p = 0.001) were associated with OS.

Conclusions

Alcohol consumption of 10–20 units/week, often regarded as moderate use, was found to increase risk of mortality independent of other prognostic variables. Systematic screening of risk level alcohol use and prognostic evaluation of alcohol brief intervention strategies is highly recommended.

Alcohol withdrawal in past-year drinkers with unhealthy alcohol use: Prevalence, characteristics, and correlates in a national epidemiologic survey

BACKGROUND

Despite its potential to produce serious adverse outcomes, DSM-5 alcohol withdrawal syndrome (AWS) has not been widely studied in the general population.

METHODS

We used cross-sectional data from 36,309 U.S. adults from the 2012-2013 National Epidemiologic Survey on Alcohol and Related Conditions-III to examine the past-year prevalence of AWS and its correlates. We focused on an important clinical population-past-year drinkers with unhealthy alcohol use-i.e., those with a positive score on the Alcohol Use Disorders Identification Test-Consumption (AUDIT-C) questionnaire. We also examined the association of AWS with sociodemographic measures, psychiatric disorders, alcohol-related measures, and healthcare utilization.

RESULTS

Approximately one-third (n = 12,634) of respondents reported unhealthy alcohol use (AUDIT-C+). Of these, 14.3% met criteria for a DSM-5 AWS diagnosis. The mean (SE) number of withdrawal symptoms among individuals with AWS was 2.83 (1.88), with the most common being nausea/vomiting and insomnia (19.8% and 11.6%, respectively). Among AUDIT-C+ respondents, the odds of AWS were significantly higher among males (adjusted odds ratio [aOR] = 1.17 [95% CI, 1.02-1.33]), unmarried participants (aOR = 1.55 [95% CI, 1.25-1.92]), and those at the lowest (vs. highest) income levels (aOR = 1.62 [95% CI, 1.37-1.92]). Among AUDIT-C+ respondents, AWS was also associated with psychiatric disorders (with aORs that ranged from 2.08 [95% CI, 1.79-2.41]) for major depressive disorder to 3.14 (95% CI, 1.79-2.41) for borderline personality disorder. AUDIT-C+ respondents with AWS also had higher odds of past-year alcohol use disorder (aOR = 11.2 [95% CI, 9.66-13.07]), other alcohol-related features (e.g., binge drinking), and healthcare utilization.

CONCLUSIONS

Among individuals with unhealthy alcohol use, AWS is prevalent, highly comorbid, and disabling. Given the risk of AWS among unhealthy drinkers, a comparatively large segment of the general population, clinicians should seek to identify individuals with AWS and intervene with them to prevent serious adverse outcomes.

Alcohol Withdrawal Is Associated With Worse Outcomes in Patients Undergoing Primary Total Knee or Total Hip Arthroplasty

BACKGROUND

Alcohol withdrawal (AW) syndrome is an independent risk factor for postoperative complications. This study aims to evaluate the influence of AW on perioperative outcomes in patients who underwent primary total knee (TKA) or total hip arthroplasty (THA).

METHODS

We used the National Inpatient Sample database to identify patients undergoing TKA/THA from 2003 to 2014. The primary exposure of interest was AW. Multivariable adjusted models were used to evaluate the association of AW with in-hospital medical complications, surgical complications, mortality, cost, and length of stay (LOS) in patients undergoing TKA/THA.

RESULTS

There were 2,971,539 adult hospitalizations for THAs and 6,367,713 hospitalizations for TKAs included in the present study, among which 0.14% of AW for THA patients and 0.10% of AW for TKA patients. Multivariable adjustment analysis suggested that AW was associated with an increased risk of medical complications (odds ratio [OR] 2.08, 95% confidence interval [CI] 1.79-2.42, P < .0001), surgical complications (OR 1.75, 95% CI 1.51-2.03, P < .0001), and had 4.79 times increase of in-hospital mortality, 26% increase of total cost, and 53% increase of LOS in THA procedures. For TKA procedures, AW was also associated with increased risk of medical complications (OR 3.14, 95% CI 2.78-3.56, P < .0001), surgical complications (OR 2.07, 95% CI 1.82-2.34, P < .0001) and 4.24 times increase of in-hospital mortality, 29% increase of total cost, and 58% increase of LOS after multivariable adjustment.

CONCLUSION

AW is associated with increased risk of in-hospital mortality, medical and surgical complications. Proactive surveillance and management of AW may be important in improving outcomes in patients who underwent THA and TKA procedure.

Expert Consensus Statement on the Perioperative Management of Adult Patients Undergoing Head and Neck Surgery and Free Tissue Reconstruction From the Society for Head and Neck Anesthesia

The perioperative care of adult patients undergoing free tissue transfer during head and neck surgical (microvascular) reconstruction is inconsistent across practitioners and institutions. The executive board of the Society for Head and Neck Anesthesia (SHANA) nominated specialized anesthesiologists and head and neck surgeons to an expert group, to develop expert consensus statements. The group conducted an extensive review of the literature to identify evidence and gaps and to prioritize quality improvement opportunities. This report of expert consensus statements aims to improve and standardize perioperative care in this setting. The Modified Delphi method was used to evaluate the degree of agreement with draft consensus statements. Additional discussion and collaboration was performed via video conference and electronic communication to refine expert opinions and to achieve consensus on key statements. Thirty-one statements were initially formulated, 14 statements met criteria for consensus, 9 were near consensus, and 8 did not reach criteria for consensus. The expert statements reaching consensus described considerations for preoperative assessment and optimization, airway management, perioperative monitoring, fluid management, blood management, tracheal extubation, and postoperative care. This group also examined the role for vasopressors, communication, and other quality improvement efforts. This report provides the priorities and perspectives of a group of clinical experts to help guide perioperative care and provides actionable guidance for and opportunities for improvement in the care of patients undergoing free tissue transfer for head and neck reconstruction. The lack of consensus for some areas likely reflects differing clinical experiences and a limited available evidence base.

Alcohol Abuse and Alcohol Withdrawal Are Associated with Adverse Perioperative Outcomes Following Elective Spine Fusion Surgery

STUDY DESIGN

Cross-sectional study.

OBJECTIVE

Alcohol abuse (AA) and alcohol withdrawal (AW), both belonging to alcohol use disorders, bring about vast health consequences, social issues, and financial burden in United States. This study aims to explore the relationship of AA and AW with perioperative outcomes following elective spine fusion surgery.

SUMMARY OF BACKGROUND DATA

Large studies evaluating the outcomes of spine surgery in patients with AA or AW are lacking.

METHODS

We used the National Inpatient Sample (NIS) from 2006 to 2014 to extract records with a primary procedure of spinal fusion surgery. Multivariable regression analysis was used to assess the association of AA and AW with in-hospital mortality, perioperative complications, cost and length of stay (LOS).

RESULTS

Among 3,132,192 patients undergoing elective spinal fusion surgery, the prevalence of AA and AW was 1.14% (35,833) and 0.15% (4623), respectively. Among the AA admissions, 12.90% of patients developed AW. The incidence of overall complications was 6.14%, 10.15%, and 33.73% in patients without AA, with AA and with AW, respectively. After multivariable adjustment, AW was associated with elevated risk of overall complications (odds ratio [OR]: 4.51; 95% confidence interval [CI]: 3.86-5.27), neurologic (OR: 2.58; 95% CI: 1.62-4.12), respiratory (OR: 8.04; 95% CI: 6.62-9.77), cardiac (OR: 3.58; 95% CI: 2.60-4.93), gastrointestinal (OR: 2.31; 95%CI: 1.68-3.17), urinary and renal (OR: 2.68; 95% CI: 2.11-3.39), venous thromboembolism (OR: 3.06; 95% CI: 1.94-4.82), wound-related complications (OR: 3.84; 95% CI: 2.96-4.98) and in-hospital mortality (OR: 5.95; 95% CI: 3.25-10.90). AW was also linked to 40% higher cost and 85% longer LOS.

CONCLUSION

Both AA and AW are associated with adverse outcomes in patients undergoing spinal fusion surgery with more pronounced risks for AW. Aggressive management in perioperative period is required to improve outcomes in these patients.Level of Evidence: 3.

Alcohol Withdrawal Syndrome in Neurocritical Care Unit: Assessment and Treatment Challenges

Alcohol withdrawal syndrome (AWS) can range from mild jittery movements, nausea, sweating to more severe symptoms such as seizure and death. Severe AWS can worsen cognitive function, increase hospital length of stay, and in-hospital mortality and morbidity. Due to a lack of reliable history of present illness in many patients with neurological injury as well as similarities in clinical presentation of AWS and some commonly encountered neurological syndromes, the true incidence of AWS in neurocritical care patients remains unknown. This review discusses challenges in the assessment and treatment of AWS in patients with neurological injury, including the utility of different scoring systems such as the Clinical Institute Withdrawal Assessment and the Minnesota Detoxification Scale as well as the reliability of admission alcohol levels in predicting AWS. Treatment strategies such as symptom-based versus fixed dose benzodiazepine therapy and alternative agents such as baclofen, carbamazepine, dexmedetomidine, gabapentin, phenobarbital, ketamine, propofol, and valproic acid are also discussed. Finally, a treatment algorithm considering the neurocritical care patient is proposed to help guide therapy in this setting.

Alcohol withdrawal is associated with poorer outcome in acute ischemic stroke

OBJECTIVE

To determine the association between alcohol abuse (AA) and alcohol withdrawal (AW) with acute ischemic stroke (AIS) outcomes.

METHODS

All adult AIS admissions in the United States from 2004 to 2014 were identified from the National Inpatient Sample (weighted n = 4,438,968). Multivariable-adjusted models were used to evaluate the association of AW with in-hospital medical complications, mortality, cost, and length of stay in patients with AIS.

RESULTS

Of the AA admissions, 10.6% of patients, representing 0.4% of all AIS, developed AW. The prevalence of AA and AW in AIS increased by 45.2% and 40.0%, respectively, over time (p for trend <0.001). Patients with AA were predominantly men (80.2%), white (65.9%), and in the 40- to 59-year (44.6%) and 60- to 79-year (45.6%) age groups. After multivariable adjustment, AIS admissions with AW had >50% increased odds of urinary tract infection, pneumonia, sepsis, gastrointestinal bleeding, deep venous thrombosis, and acute renal failure compared to those without AW. Patients with AW were also 32% more likely to die during their AIS hospitalization compared to those without AW (odds ratio 1.32, 95% confidence interval 1.11-1.58). AW was associated with ≈15-day increase in length of stay and ≈$5,000 increase in hospitalization cost (p < 0.001).

CONCLUSION

AW is associated with increased cost, longer hospitalizations, and higher odds of medical complications and in-hospital mortality after AIS. Proactive surveillance and management of AW may be important in improving outcomes in these patients.

Head and Neck Reconstructive Surgery: Characterization of the One-Team and Two-Team Approaches

PURPOSE

To the best of our knowledge, no studies have compared the patient profiles for 1- versus 2-team surgery within head and neck oncosurgery.

PATIENTS AND METHODS

A retrospective study of the data from 2968 patients who had undergone concurrent head and neck extirpative and reconstructive surgery in the National Surgical Quality Improvement Program (2010 to 2017) was conducted. Patients were stratified into 1- and 2-team surgery groups, and the demographic data were compared. Univariate analyses of the outcomes before and after propensity score matching were conducted.

RESULTS

Most ablative and reconstructive head and neck procedures (68.5%) were performed using a 1-team approach. The patients who had undergone 2-team surgery were more likely to have a higher American Society of Anesthesiologists classification (P < .001), to require mandibulectomy (P < .001) or glossectomy (P < .001), and to receive a microvascular free flap (P < .001) but were less likely to require parotidectomy (P < .001) or to receive a rotational flap (P < .001). Before propensity score matching, the patients undergoing 2-team surgery had longer operative times (P < .001), longer postoperative stays (P < .001), greater rates of a return to the operating room (P = .001), and an increased rate of complications (P < .001). After propensity score matching, the 2-team approach continued to have longer operative times (P < .001) and an increased incidence of complications (P < .001) but no significant differences in the length of stay or rate of return to the operating room after Bonferroni's correction.

CONCLUSIONS

Nationally, most head and neck ablative and reconstructive surgeries were completed by 1 team. More complicated reconstructive procedures involving microvascular free flaps have been more commonly performed by 2 teams, resulting in slightly longer operative times and greater associated complication rates.

Adjunct Ketamine Use in the Management of Severe Ethanol Withdrawal

OBJECTIVES

Ketamine offers a plausible mechanism with favorable kinetics in treatment of severe ethanol withdrawal. The purpose of this study is to determine if a treatment guideline using an adjunctive ketamine infusion improves outcomes in patients suffering from severe ethanol withdrawal.

DESIGN

Retrospective observational cohort study.

SETTING

Academic tertiary care hospital.

PATIENTS

Patients admitted to the ICU and diagnosed with delirium tremens by Diagnostic and Statistical Manual of Mental Disorders V criteria.

INTERVENTIONS

Pre and post guideline, all patients were treated in a symptom-triggered fashion with benzodiazepines and/or phenobarbital. Postguideline, standard symptom-triggered dosing continued as preguideline, plus, the patient was initiated on an IV ketamine infusion at 0.15-0.3 mg/kg/hr continuously until delirium resolved. Based upon withdrawal severity and degree of agitation, a ketamine bolus (0.3 mg/kg) was provided prior to continuous infusion in some patients.

MEASUREMENTS AND MAIN RESULTS

A total of 63 patients were included (29 preguideline; 34 postguideline). Patients treated with ketamine were less likely to be intubated (odds ratio, 0.14; p < 0.01; 95% CI, 0.04-0.49) and had a decreased ICU stay by 2.83 days (95% CI, -5.58 to -0.089; p = 0.043). For ICU days outcome, correlation coefficients were significant for alcohol level and total benzodiazepine dosing. For hospital days outcome, correlation coefficients were significant for patient age, aspartate aminotransferase, and alanine aminotransferase level. Regression revealed the use of ketamine was associated with a nonsignificant decrease in hospital stay by 3.66 days (95% CI, -8.40 to 1.08; p = 0.13).

CONCLUSIONS

Mechanistically, adjunctive therapy with ketamine may attenuate the demonstrated neuroexcitatory contribution of N-methyl-D-aspartate receptor stimulation in severe ethanol withdrawal, reduce the need for excessive gamma-aminobutyric acid agonist mediated-sedation, and limit associated morbidity. A ketamine infusion in patients with delirium tremens was associated with reduced gamma-aminobutyric acid agonist requirements, shorter ICU length of stay, lower likelihood of intubation, and a trend toward a shorter hospitalization.

Factors Associated with Free Flap Failures in Head and Neck Reconstruction

Objective

To investigate causes of failure of free flap reconstructions in patients undergoing reconstruction of head and neck defects.

Study Design

Case series with chart review.

Setting

Single tertiary care center.

Subjects and Methods

Patients underwent reconstruction between January 2007 and June 2017 (n = 892). Variables included were clinical characteristics, social history, defect site, donor tissue, ischemia time, and postoperative complications. Statistical methods used include univariable and multivariable analysis of failure.

Results

The overall failure rate was 4.8% (n = 43). Intraoperative ischemia time was associated with free flap failures (odds ratio [OR], 1.062; 95% confidence interval [CI], 1.019-1.107; P = .004) for each addition of 5 minutes. Free flaps that required pedicle revision at time of initial surgery were 9 times more likely to fail (OR, 9.953; 95% CI, 3.242-27.732; P < .001). Patients who experienced alcohol withdrawal after free flap placement were 3.7 times more likely to experience flap failure (OR, 3.690; 95% CI, 1.141-10.330; P = .031). Ischemia time remained an independent significant risk factor for failure in nonosteocutaneous free flaps (OR, 1.105; 95% CI, 1.031-1.185). Alcohol withdrawal was associated with free flap failure in osteocutaneous reconstructions (OR, 5.046; 95% CI 1.103-19.805) while hypertension was found to be protective (OR, 0.056; 95% CI, 0.000-0.445).

Conclusion

Prolonged ischemia time, pedicle revision, and alcohol withdrawal were associated with higher rates of flap failure. Employing strategies to minimize ischemic time may have potential to decrease failure rates. Flaps that require pedicle revision and patients with a history of significant alcohol use require closer monitoring.

Potential disease burden of patients with substance abuse undergoing major abdominal surgery: A propensity score-matched analysis

BACKGROUND

Over 19 million Americans have a substance abuse disorder. The current study sought to characterize the relationship between substance abuse with in-hospital outcomes following major, elective abdominal surgery.

METHODS

The Nationwide Inpatient Sample was used to identify patients who underwent major abdominal surgery between 2007 to 2014. Patients with preoperative substance abuse, including alcohol, opioids, and non-opioid drugs, were identified. Propensity score matching was used to examine the association of substance abuse with perioperative outcomes.

RESULTS

Among 301,659 patients, 7,925 patients (2.6%) had a history of substance abuse. Pancreatectomy was the surgical procedure with the highest proportion of patients with substance abuse history (n = 844, 4.7%). Compared with patients without a substance abuse history, patients with a substance abuse history were more likely to be younger (median age, 60 years [interquartile range (IQR) 52-69] vs 63 years [IQR 52-72]), male (n = 5,438, 67.5% vs n = 132,961, 54.7%), and be in the lowest income category (n = 2,062, 26% vs n = 64,345, 21.9%) (all P < .001). On propensity score matching, substance abuse was associated with increased odds ratio of experiencing a complication (odds ratio [OR] 1.68, 95% confidence interval [CI] 1.55-1.82), non-home discharge (OR 1.95, 95% CI 1.76-2.16), extended length of stay (OR 1.88, 95% CI 1.76-2.02), and higher expenditure (OR 1.62, 95% CI 1.49-1.77). Stratified by the type of substance abuse, patients with history of alcohol (OR 1.57, 95% CI 1.44-1.71) and drug abuse (OR 1.26, 95% CI 1.14-1.39) were more likely to experience a complication, whereas only history of alcohol abuse was associated with higher odds ratio of in-hospital mortality (OR 1.38, 95% CI 1.07-1.79) (all P < .05).

CONCLUSION

Up to 1 in 50 patients undergoing complex abdominal surgery had a substance abuse history. History of substance abuse was associated with an increased risk of adverse perioperative outcomes and higher healthcare expenditures.

Cost and Healthcare Utilization Among Non-Elderly Head and Neck Cancer Patients in the Military Health System, a Single-Payer Universal Health Care Model

INTRODUCTION

Examining costs and utilization in a single-payer universal health care system provides information on fiscal and resource burdens associated with head and neck cancer (HNC). Here, we examine trends in the Department of Defense (DoD) HNC population with respect to: (1) reimbursed annual costs and (2) patterns and predictors of health care utilization in military only, civilian only, and both systems of care (mixed model).

MATERIALS AND METHODS

A retrospective, cross-sectional study was conducted using TRICARE claims data from fiscal years 2007 through 2014 for reimbursement of ambulatory, inpatient, and pharmacy charges. The study was approved by the Defense Health Agency Office of Privacy and Civil Liberties as exempt from institutional review board full review. The population was all beneficiaries, age 18-64, with a primary ICD-9 diagnosis of HNC, on average, 2,944 HNC cases per year. The outcomes of regression models were total reimbursed health care cost, and counts of ambulatory visits, hospitalizations, and bed days. The predictors were fiscal year, demographic variables, hospice use, type and geographic region of TRICARE enrollment, use of military or civilian care or mixed use, cancer treatment modalities, the number of physical and mental health comorbid conditions, and tobacco use. A priori, null hypotheses were assumed.

RESULTS

Per annual average, 61% of the HNC population was age 55-64, and 69% were males. About 6% accessed military facilities only for all health care, 60% accessed civilian only, and 34% accessed both military and civilian facilities. Patients who only accessed military care had earlier stage disease as indicated by rates of single modality treatment and hospice use; military care only and mixed use had similar rates of combination treatment and hospice use. The average cost per patient per year was $14,050 for civilian care only, $13,036 for military care only, and $29,338 for mixed use of both systems. The strongest predictors of higher cost were chemotherapy, radiation therapy, head and neck surgery, hospice care, and mixed-use care. The strongest predictors of health care utilization were chemotherapy, use of hospice, the number of physical and mental health comorbidities, radiation therapy, head and neck surgery, and system of care.

CONCLUSIONS

To a single payer, the use of a single system of care exclusively among HNC patients is more cost-effective than use of a mixed-use system. The results suggest an over-utilization of ambulatory care services when both military and civilian care are accessed. Further investigation is needed to assess coordination between systems of care and improved efficiencies with respect to the cost and apparent over-utilization of health care services.

Alcohol and Cancer: A Statement of the American Society of Clinical Oncology

Alcohol drinking is an established risk factor for several malignancies, and it is a potentially modifiable risk factor for cancer. The Cancer Prevention Committee of the American Society of Clinical Oncology (ASCO) believes that a proactive stance by the Society to minimize excessive exposure to alcohol has important implications for cancer prevention. In addition, the role of alcohol drinking on outcomes in patients with cancer is in its formative stages, and ASCO can play a key role by generating a research agenda. Also, ASCO could provide needed leadership in the cancer community on this issue. In the issuance of this statement, ASCO joins a growing number of international organizations by establishing a platform to support effective public health strategies in this area. The goals of this statement are to:

• Promote public education about the risks between alcohol abuse and certain types of cancer;

• Support policy efforts to reduce the risk of cancer through evidence-based strategies that prevent excessive use of alcohol;

• Provide education to oncology providers about the influence of excessive alcohol use and cancer risks and treatment complications, including clarification of conflicting evidence; and

• Identify areas of needed research regarding the relationship between alcohol use and cancer risk and outcomes.

Patient Outcomes Associated With Phenobarbital Use With or Without Benzodiazepines for Alcohol Withdrawal Syndrome: A Systematic Review

Purpose: Benzodiazepines are the drug of choice for alcohol withdrawal syndrome (AWS); however, phenobarbital is an alternative agent used with or without concomitant benzodiazepine therapy. In this systematic review, we evaluate patient outcomes with phenobarbital for AWS. Methods: Medline, Cochrane Library, and Scopus were searched from 1950 through February 2017 for controlled trials and observational studies using ["phenobarbital" or "barbiturate"] and ["alcohol withdrawal" or "delirium tremens."] Risk of bias was assessed using tools recommended by National Heart, Lung, and Blood Institute. Results: From 294 nonduplicative articles, 4 controlled trials and 5 observational studies (n = 720) for AWS of any severity were included. Studies were of good quality (n = 2), fair (n = 4), and poor (n = 3). In 6 studies describing phenobarbital without concomitant benzodiazepine therapy, phenobarbital decreased AWS symptoms (P < .00001) and displayed similar rates of treatment failure versus comparator therapies (38% vs 29%). A study with 2 cohorts showed similar rates of intensive care unit (ICU) admission (phenobarbital: 16% and 9% vs benzodiazepine: 14%) and hospital length of stay (phenobarbital: 5.85 and 5.30 days vs benzodiazepine: 6.64 days). In 4 studies describing phenobarbital with concomitant benzodiazepine therapy, phenobarbital groups had similar ICU admission rates (8% vs 25%), decreased mechanical ventilation (21.9% vs 47.3%), decreased benzodiazepine requirements by 50% to 90%, and similar ICU and hospital lengths of stay and AWS symptom resolution versus comparator groups. Adverse effects with phenobarbital, including dizziness and drowsiness, rarely occurred. Conclusion: Phenobarbital, with or without concomitant benzodiazepines, may provide similar or improved outcomes when compared with alternative therapies, including benzodiazepines alone.

Impact of an Alcohol Withdrawal Treatment Pathway on Hospital Length of Stay: A Retrospective Observational Study Comparing Pre and Post Pathway Implementation

OBJECTIVE

To determine if the implementation of a hospital-specific alcohol withdrawal treatment pathway used in a medical-surgical patient population decreased hospital length of stay (LOS) compared with the standard of care.

METHODS

This retrospective observational study, conducted in a large academic tertiary care hospital, involved 582 subjects who met criteria for study inclusion, with 275 subjects in the 2010 cohort and 307 in the 2012 cohort. The Alcohol Withdrawal Project Team was formed with the goal of creating a standardized approach to the recognition and treatment of alcohol withdrawal at Duke University Hospital. The group created a computerized physician order entry alcohol withdrawal treatment pathway with 4 possible treatment paths chosen on the basis of current withdrawal symptoms, vital signs, and alcohol withdrawal history. The 4 treatment paths are 1 prophylaxis; 2 mild-to-moderate withdrawal; 3 moderate-to-severe withdrawal, and 4 severe withdrawal/alcohol withdrawal delirium. Each treatment path corresponds to a different lorazepam dose and dose schedule and symptom assessment. This pathway was implemented in the hospital at the end of 2011.

RESULTS

Using a Cox proportional hazards model and adjusting for covariates, there was a 1 day [95% confidence interval (CI), 1-2 d] reduction in median hospital LOS between the 2010 and 2012 cohorts, 5 versus 4 days, respectively. The average ratio in hospital LOS between the 2 cohorts was 1.25 (95% CI, 1.25-1.67). The CI was estimated by bootstrapping and indicated a significantly longer LOS in the 2010 cohort compared with the 2012 cohort. Nonsignificant changes were found in the proportion of subjects admitted to the intensive care unit (24% in 2010 vs. 29.3% in 2012), LOS in the intensive care unit (7.1±8 d in 2010 vs. 5.6±6.9 d in 2012), and proportion of patients discharged with a diagnosis of delirium tremens (17.8% in 2010 vs. 15.3% in 2012).

CONCLUSIONS

This study demonstrates the successful implementation of an alcohol withdrawal treatment pathway in a medical-surgical population hospitalized in a large tertiary care facility with significant impact on hospital LOS.

A systematic nurse-led approach to withdrawal risk screening, prevention and treatment among inpatients with an alcohol use disorder in an ear, nose, throat and jaw surgery department-A formative evaluation

INTRODUCTION

Among patients with head and neck cancer comorbid alcohol use disorder is frequent which contributes to higher risk of developing perioperative alcohol withdrawal syndrome/delirium or delirium due to medical conditions. Although guidelines emphasize prevention and treatment of alcohol withdrawal in hospitalized patients, a validated systematic approach for management of these patients is still lacking. Our aim was to formatively evaluate our newly developed systematic approach in view of nurses' adherence to screening patients for regular alcohol consumption and managing their withdrawal symptoms using the Clinical Institute Withdrawal Assessment of Alcohol Scale, Revised.

METHODS

We conducted a formative evaluation to improve the project's design and performance and used a retrospective chart review in a consecutive sample of all adult inpatients with head and neck cancer being assigned for surgery in a university hospital. Our bundle of interventions consisted of nurses' screenings for regular alcohol consumption, withdrawal risk assessment, offering patients a substitution therapy, nurses' assessments of withdrawal symptoms and symptom oriented withdrawal management. Proximate endpoints were analyzed descriptively at each component of the bundle in terms of frequencies and severity of withdrawal symptoms, frequencies of nurses' and doctors' screenings and nurses' assessments performed as required.

RESULTS

Between 2013 and 2014, 87 inpatients met inclusion criteria and screenings by doctors/ nurses revealed 49 alcohol consumers, where six screenings were omitted by nurses and six by doctors. Twenty-one consumers were at risk and six of them developed an alcohol withdrawal syndrome. None of the 87 showed an alcohol withdrawal delirium, but five developed a delirium due to medical conditions. Nurses correctly conducted all preventive elements of the intervention bundle in 14 (58%) patients at risk but overall, only performed 50% of the required assessments.

CONCLUSIONS

Although nurses safely managed patients' symptoms, nurses' adherence to the interventions was suboptimal and requires stronger leadership.

Association between age, substance use, and outcomes in Medicare enrollees with prostate cancer

OBJECTIVE

To analyze the association between age, substance use, and outcomes in fee-for-service Medicare enrollees with advanced prostate cancer.

METHODS

Retrospective longitudinal cohort study of elderly men diagnosed with advanced prostate cancer using SEER-Medicare data between 2000 and 2009. Substance use disorder was identified using claims for alcoholic psychosis, drug psychoses, alcohol dependence syndrome, drug dependence, and non-dependent use of drugs. We compared health service use, cost, and 5-year mortality across two age-groups: young-old (66-74years) and old-old (≥ 75years).

RESULTS

Cohort consisted of 8484 young-old and 5763 old-old patients with advanced prostate cancer. Prevalence of substance use was 12.4% in young-old and 7.4% in old-old group. For the young-old group, the 'drug psychoses and related' category had the highest inpatient, outpatient, and ER usage as well as the highest hazard of mortality (HR=2.2; CI=1.5, 3.1), compared to those without substance use. Compared to the no substance use group, those with substance use in the follow-up phase had higher inpatient and ER visits, and those with substance use in treatment phase had higher outpatient visits and highest hazard of mortality (HR=1.6; CI=1.4, 1.9). For the old-old group, the 'drug psychoses and related' category was associated with highest inpatient and outpatient use; and 'Non-dependent use of drugs' were associated with highest ER use, compared to those without substance use.

CONCLUSION

Intersection of cancer and substance use disorder in elderly patients with advanced prostate cancer covered by Medicare is age specific. An integrated and multidisciplinary approach to screen, refer, and treat substance use in patients with prostate cancer may improve outcomes and reduce costs.

Course of psychiatric comorbidity and utilization of mental health care after laryngeal cancer: a prospective cohort study

In a German multi-center prospective cohort study, we wanted to assess the course of psychiatric comorbidity, utilization of mental health care and psychosocial care needs in laryngeal cancer patients during the first year after partial laryngectomy (PRL). Structured interviews with patients were conducted before surgery, 1 week (1 w), 3 months (3 m) and 1 year (12 m) after PRL. Psychiatric comorbidity was assessed using the Structured Clinical Interview for DSM-IV (SCID). Psychosocial care needs and utilization of mental health care were evaluated with standardized face-to-face interviews. In 176 patients, psychiatric disorders were prevalent in 11 % (1 w), 15 % (3 m) and 14 % (12 m), respectively, of which 4 % (12 m) underwent psychiatric treatment or psychotherapy. Two percent had acute, 15 % emerging and 6 % chronic psychiatric comorbidity. Chronically mental ill patients were more frequently younger than 65 years (p = 0.026), female (p = 0.045) and experienced more often a need for psychological counseling (p ≤ 0.001). One year after surgery, 27 % of the comorbid psychiatric patients expressed a need for additional psychological counseling. Alcohol-related disorders were diagnosed in 3 % (1 w), 3 % (3 m) and 8 % (12 m), respectively. Only one of these patients received psychological treatment, while 14 % expressed a need for psychological counseling and 7 % for additional medical consultations. The non-treatment of alcohol-related disorders measured in our sample indicates a major problem since continued alcohol consumption in laryngeal cancer patients is associated with reduced global quality of life, increased functional impairments and reduced overall survival. Screening instruments integrated into acute care are necessary to detect harmful drinking behavior.

Algorithm to predict postoperative complications in oropharyngeal and oral cavity carcinoma

BACKGROUND

Preoperative data in patients with oral cavity/oropharyngeal cancer may predict postoperative complications that may modify therapeutic choices and improve patient care.

METHOD

We reviewed 320 consecutive patients with oral cavity/oropharyngeal cancer, operated on 2003 through 2006 at the European Institute of Oncology. By multivariate analysis of preoperative patient and tumor characteristics, we developed an algorithm to predict postoperative complications. We tested the algorithm on a new series of 307 patients operated on 2007 through 2010.

RESULTS

The final algorithm used to produce a nomogram was comprised of: alcohol consumption (p = .01), site of primary (p = .03), interaction of clinical T classification to sex (p = .007), and type of neck dissection (p < .0001). The algorithm had good ability to predict complications (concordance index [c-index] 0.74) in the new series.

CONCLUSION

The nomogram accurately predicts presurgical risk of postoperative local/systemic complications in patients with oral cavity/oropharyngeal cancer and can be used to adapt therapy to patient characteristics, optimize ward admissions, and improve care.

Mental disorders and psychosocial support during the first year after total laryngectomy: a prospective cohort study

OBJECTIVES

To assess the frequency of mental disorders and the use of psychosocial services in laryngectomised patients during the first year after surgery.

DESIGN

Multicentre prospective study including six interviews. Data regarding psychiatric comorbidity 3 months (3 m) and 1 year (12 m) after total laryngectomy (TLE) are reported in this study.

SETTING

Structured interviews were conducted at nine hospitals and three rehabilitation centres in Germany.

PARTICIPANTS

One hundred and seventy-one patients were interviewed at both time-points.

MAIN OUTCOME MEASURES

Structured clinical interview for DSM-IV (SCID).

RESULTS

Mental disorders were diagnosed in 25% of the patients (3 m) and in 22% of the patients (12 m), respectively. Six per cent of the patients developed a mental disorder during the first year after total laryngectomy. In general, male and female patients suffered from mental disorders with equal frequency (3 m: 23% versus 37%; P = 0.26; 12 m: 22% versus 21%; P = 1.00). Women suffered more often than men from post-traumatic stress disorder (3 m) (P = 0.01) and generalised anxiety disorder (12 m) (P = 0.01).Of the patients who had acquired no voice, 20% suffered from alcohol dependence (P = 0.01) [corrected]. There were no differences between men and women in receiving any kind of counselling (P = 0.79) or psychotherapy/psychiatric treatment (P = 0.47). Of those patients diagnosed with any mental disorder 3 months after total laryngectomy, 7% had received psychotherapy 1 year after total laryngectomy. None of the patients diagnosed with alcohol dependence received psychotherapy or psychiatric treatment.

CONCLUSIONS

Mental disorders occur in laryngectomees as frequently in men as they do in women. Total laryngectomised patients who were mentally ill did not receive enough psychotherapeutic or psychiatric support. As mental health seems to be related to successful voice restoration, future research should develop and evaluate special psychosocial supportive programmes for patients with laryngeal cancer, especially regarding alcohol dependence treatment.

Salvage surgery for recurrent oropharyngeal cancer: post-operative oncologic and functional outcomes

CONCLUSION

Post-operative outcomes of salvage surgery for recurrent oropharyngeal squamous-cell carcinoma (OPSCC) were acceptable. Pathologic overall, T- or N-stage and patient comorbidities were the main predictors of patient clinical outcomes.

OBJECTIVES

To evaluate post-operative outcomes of salvage surgery in patients with recurrent OPSCC and to determine their predictive factors.

MATERIALS AND METHODS

This study retrospectively reviewed the electronic medical records of all patients who underwent salvage surgery for recurrent OPSCC, between 2000-2013, in our institution. Overall survival (OS) and cause-specific survival (SS) were determined by Kaplan-Meier analysis. Predictive factors of post-operative outcomes were investigated by using univariate and multivariate analyses.

RESULTS

A total of 34 patients were included in this study. Local and general post-operative complication rates were 26% and 27%, respectively. A high level of comorbidity (Kaplan Feinstein Index: KFI ≥ 2) was the only factor associated with a higher risk of local (p = 0.03) and general (p = 0.04) complications. OS and SS rates at 3 years were 48% and 61%, respectively. In multivariate analysis, pathologic overall stage ≥ III was a significant predictor of OS (p = 0.02) and pathologic T-stage ≥ 3 was a significant predictor of SS (p = 0.01). Mean pre-operative and post-operative DOSS (dysphagia outcome and severity scale) scores were 4.4 and 3.9, respectively.

Tobacco use and surgical outcomes in patients with head and neck cancer

BACKGROUND

Tobacco use is a risk factor for head and neck cancer, but effects on postoperative outcomes are unclear.

METHODS

Patients with head and neck cancer (n = 89) were recruited before surgery. We assessed self-reported tobacco use status (never, former, or current) at study entry and recent tobacco exposure via urinary cotinine on surgery day. Outcomes included hospital length of stay (LOS) and complications.

RESULTS

Most participants reported current (32.6%) or former (52.8%) tobacco use; 43.2% were cotinine-positive on surgery day. Complications occurred in 41.6% and mean LOS was 4.0 and 8.8 days in patients who received low and high acuity procedures, respectively. Current and former smokers were over 6 times more likely to have complications than never smokers (p = .03). For high acuity procedures, LOS was increased in current (by 4.4 days) and former smokers (by 2.3 days; p = .02).

CONCLUSION

Tobacco use status is associated with postoperative complications and may distinguish at-risk patients.

The "Prediction of Alcohol Withdrawal Severity Scale" (PAWSS): systematic literature review and pilot study of a new scale for the prediction of complicated alcohol withdrawal syndrome

BACKGROUND

To date, no screening tools for alcohol withdrawal syndromes (AWS) have been validated in the medically ill. Although several tools quantify the severity of AWS (e.g., Clinical Institute Withdrawal Assessment for Alcohol [CIWA]), none identify subjects at risk of AWS, thus missing the opportunity for timely prophylaxis. Moreover, there are no validated tools for the prediction of complicated (i.e., moderate to severe) AWS in the medically ill.

OBJECTIVES

Our goals were (1) to conduct a systematic review of the published literature on AWS to identify clinical factors associated with the development of AWS, (2) to use the identified factors to develop a tool for the prediction of alcohol withdrawal among patients at risk, and (3) to conduct a pilot study to assess the validity of the tool.

METHODS

For the creation of the Prediction of Alcohol Withdrawal Severity Scale (PAWSS), we conducted a systematic literature search using PRISMA (preferred reporting items for systematic reviews and meta-analyses) guidelines for clinical factors associated with the development of AWS, using PubMed, PsychInfo, MEDLINE, and Cochrane Databases. Eligibility criteria included: (i) manuscripts dealing with human subjects, age 18 years or older, (ii) manuscripts directly addressing descriptions of AWS or its predisposing factors, including case reports, naturalistic case descriptions, and all types of clinical trials (e.g., randomized, single-blind, or open label studies), (iii) manuscripts describing characteristics of alcohol use disorder (AUD), and (iv) manuscripts dealing with animal data (which were considered only if they directly dealt with variables described in humans). Obtained data were used to develop the Prediction of Alcohol Withdrawal Severity Scale, in order to assist in the identification of patients at risk for complicated AWS. A pilot study was conducted to assess the new tool's psychometric qualities on patients admitted to a general inpatient medicine unit over a 2-week period, who agreed to participate in the study. Blind to PAWSS results, a separate group of researchers retrospectively examined the medical records for evidence of AWS.

RESULTS

The search produced 2802 articles describing factors potentially associated with increased risk for AWS, increased severity of withdrawal symptoms, and potential characteristics differentiating subjects with various forms of AWS. Of these, 446 articles met inclusion criteria and underwent further scrutiny, yielding a total of 233 unique articles describing factors predictive of AWS. A total of 10 items were identified as correlated with complicated AWS (i.e., withdrawal hallucinosis, withdrawal-related seizures, and delirium tremens) and used to construct the PAWSS. During the pilot study, a total of 68 subjects underwent evaluation with PAWSS. In this pilot sample the sensitivity, specificity, and positive and negative predictive values of PAWSS were 100%, using the threshold score of 4.

DISCUSSION

The results of the literature search identified 10 items which may be correlated with risk for complicated AWS. These items were assembled into a tool to assist in the identification of patients at risk: PAWSS. The results of this pilot study suggest that PAWSS may be useful in identifying risk of complicated AWS in medically ill, hospitalized individuals. PAWSS is the first validated tool for the prediction of severe AWS in the medically ill and its use may aid in the early identification of patients at risk for complicated AWS, allowing for prophylaxis against AWS before severe alcohol withdrawal syndromes develop.

Severe Pulmonary Suppuration with Infection-Induced Systemic Inflammatory Response Syndrome following Tongue Cancer Surgery in a Patient Undergoing Tocilizumab Therapy for Rheumatoid Arthritis

A 65-year-old woman with rheumatoid arthritis treated by tocilizumab (TCZ) presented with tongue squamous cell carcinoma. While surgery was performed without any complications the aspiration pneumonia rapidly worsened by postoperative day 2 and severe pulmonary suppuration in the right lung field with infection-induced systemic inflammatory response syndrome (SIRS) was diagnosed. Antibiotic and respirator treatment improved her condition. The anti-inflammatory effect of TCZ may mask the symptoms and signs of severe infection with SIRS.

Peri-operative management of older people undergoing surgery

Increasing numbers of older people are undergoing both emergency and elective surgery. However, they remain at increased risk of adverse outcome in comparison with younger patients. This may relate to the association of ageing with physiological deterioration, multi-morbidity and geriatric syndromes such as frailty, all of which are independent predictors of adverse post-operative outcome. Although there is an emerging evidence base for the identification and management of these predictors, this has not yet translated into routine clinical practice. Older patients undergoing surgery often receive sub-optimal care and surgical pathways are not well suited to complex older patients with multi-pathology. Evidence is emerging for alternative models of care that incorporate the evolving evidence base for optimal peri-operative management of the older surgical patient, including risk assessment and optimization. This article aims to provide a practical overview of the literature to all disciplines working in this field.

Dexmedetomidine for the treatment of alcohol withdrawal syndrome: rationale and current status of research

Dexmedetomidine is currently used in the US in the treatment of alcohol withdrawal syndrome (AWS) in the intensive care unit (ICU) setting, although data to support this practice are limited. Dexmedetomidine targets the noradrenergic system, an important but frequently overlooked secondary mechanism in the development of AWS, and, in doing so, may reduce the need for excessive benzodiazepine use which can increase the risk of γ-aminobutyric acid (GABA)-mediated deliriogenesis and respiratory depression. The purpose of this narrative review is to evaluate available literature reporting on the safety and efficacy of dexmedetomidine for AWS in the ICU setting. An English-language MEDLINE search (1966 to July 2013) was performed to identify articles evaluating the efficacy and safety of dexmedetomidine for AWS. Case series, case reports and controlled trials were evaluated for topic relevance and clinical applicability. Reference lists of articles retrieved through this search were reviewed to identify any relevant publications. Studies focusing on the safety and efficacy of dexmedetomidine for AWS in humans were selected. Studies were included if they were published as full articles; abstracts alone were not included in this review. Eight published case studies and case series were identified. Based on a limited body of evidence, dexmedetomidine shows promise as a potentially safe and possibly effective adjuvant treatment for AWS in the ICU. Prospective, well-controlled studies are needed to confirm the safety and efficacy of the use of dexmedetomidine in AWS.

Alcohol withdrawal prevention: a randomized evaluation of lorazepam and ethanol--a pilot study

BACKGROUND

Alcohol withdrawal syndrome, characterized by confusion, agitation, and hallucinations, decreases the safety of patients with acute myocardial infarction. Unexpected hospitalization and sudden cessation of alcohol consumption may increase in-hospital complications and length of stay and even precipitate death.

PURPOSE

To perform a randomized evaluation of lorazepam and ethanol/lorazepam to evaluate the safety and efficacy of these 2 strategies for preventing alcohol withdrawal syndrome in patients with acute coronary syndromes.

METHODS

Patients (n = 57) with myocardial infarction were screened for alcohol dependence by using the CAGE questionnaire and randomized to treatment with lorazepam or ethanol with lorazepam. Demographics and complication rates were analyzed by using χ² tests (categorical variables) and t tests (continuous variables). Safety (composite complication rates) of the treatment strategy was evaluated by using the Fisher exact test, and length of stay by using the Wilcoxon rank-sum test.

RESULTS

Safety-associated complication rates (self-extubation, delirium tremens, reinfarction) did not differ between groups (24% lorazepam vs 18% ethanol; P = .56). Days spent in the cardiac intensive care unit (7% lorazepam vs 2% ethanol; P = .32) and overall hospital stay (6% lorazepam vs 6% ethanol; P = .72) did not differ between the 2 groups.

CONCLUSIONS

These preliminary findings suggest that a randomized evaluation of treatment strategies to prevent complications associated with alcohol withdrawal in patients with acute myocardial infarction is safe and feasible.