In patients with head injury undergoing rapid sequence intubation, does pretreatment with intravenous lignocaine/lidocaine lead to an improved neurological outcome? A review of the literature

High risk and low incidence diseases: Aneurysmal subarachnoid hemorrhage

INTRODUCTION

Aneurysmal subarachnoid hemorrhage (aSAH) is a serious condition that carries a high rate of morbidity.

OBJECTIVE

This review highlights the pearls and pitfalls of aSAH, including presentation, diagnosis, and management in the emergency department based on current evidence.

DISCUSSION

aSAH is a type of hemorrhagic stroke, most commonly from rupture of a saccular aneurysm, which results in leakage of blood into the subarachnoid space. It presents acutely and has many mimics, making the diagnosis difficult. Patients who present with either sentinel or acute presentation of a headache that is described as sudden or severe, has associated neck stiffness, cranial nerve deficits, syncope, seizure, and/or coma should raise suspicion for the diagnosis. Non-contrast head computed tomography is the imaging modality of choice for evaluation and diagnosis of the disease in patients who present acutely. Further diagnostic testing with lumbar puncture or advanced neuroimaging may be required in patients who present >6 h after symptom onset. Patients with aSAH require critical, multidisciplinary care, with particular attention to management of airway, breathing, and circulation; expeditious referral for neurosurgical intervention; coagulopathy reversal; and prophylaxis against downstream complications.

CONCLUSION

An understanding of aSAH can assist emergency clinicians in diagnosing and managing this disease.

Review of Ventilation in Traumatic Brain Injury

Acute brain injury is a prominent admitting diagnosis of critically ill patients, often requiring endotracheal intubation to protect the airway and resulting in respiratory failure and the need for mechanical ventilation. Following brain injury, a primary focus is avoidance of secondary insults including both hypercarbia and hypoxemia. Hyperoxemia may also result in unanticipated neurologic consequences. Brain-lung crosstalk refers to complex relationships that drive iatrogenic injury in both organs, mediated by inflammation, immunosuppression, and autonomic dysfunction. In an effort to further reduce secondary brain injury, care must be taken from time of intubation to extubation to preserve cerebral blood flow and adequate oxygen delivery. This review describes timing and methodology for intubation of a patient with brain injury, the controversies and current recommendations related to mechanical ventilation settings, and the difficulty of decision-making with extubation and tracheostomy.

Pharmacotherapy adjuncts for traumatic brain injury: A narrative review of evidence and considerations in the emergency department

Traumatic Brain Injury (TBI) remains a significant global health concern with significant impact on morbidity and mortality. This narrative review explores adjunctive pharmacologic agents to be employed by emergency medicine clinicians during Advanced Trauma Life Support (ATLS) in patients presenting with a TBI. Pharmacologic agents are commonly employed for the management of rapid sequence intubation and post-intubation analgosedation, hemodynamics, intracranial pressure, coagulopathy, seizure prophylaxis, and infection. This narrative review discusses current evidence and controversies to optimize adjunct pharmacotherapies during the acute management of TBI within the emergency department.

Airway Management in Patients With Acute Brain Injury or Ischemia

BACKGROUND

Airway management and endotracheal intubation are essential skills of emergency medicine. Patients with acute brain injury or ischemia have complex physiology, and without caution, endotracheal intubation can inadvertently lead to secondary brain injury. This article summarizes the evidence behind airway management for patients with acute brain injury or ischemia.

OBJECTIVES

We present data that will help to clarify our recommended actions before, during, and after endotracheal intubation for a patient with acute brain injury or ischemia.

DISCUSSION

The principles described in this article are centered around avoiding secondary brain injury. Before intubation, it is important to avoid extremes of blood pressure, ensure the patient is preoxygenated, and manage elevated intracranial pressure. We recommend performing a full neurological examination, if feasible. During intubation, using a hemodynamically neutral induction agent such as ketamine or etomidate minimizes the risk of hypotension, which can worsen ischemia. Ketamine was traditionally avoided but has been shown to not affect the cerebral perfusion pressure, and thus is acceptable to use in this patient population. We also recommend the use of video laryngoscopy. Following intubation, we recommend adjusting ventilator settings to target eucapnia. Adequate sedation can assist with the management of intracranial pressure. The use of electroencephalogram (EEG) monitoring can identify non-convulsive status epilepticus.

CONCLUSION

This evidence-based review of airway management in patients with acute brain injury or ischemia can minimize the risk of secondary brain injury and optimize patient outcomes.

Telemedicine Protocols for the Management of Patients with Acute Spontaneous Intracerebral Hemorrhage in Rural and Medically Underserved Areas in Gangwon State : Recommendations for Doctors with Less Expertise at Local Emergency Rooms

Previously, we reported the concept of a cloud-based telemedicine platform for patients with intracerebral hemorrhage (ICH) at local emergency rooms in rural and medically underserved areas in Gangwon state by combining artificial intelligence and remote consultation with a neurosurgeon. Developing a telemedicine ICH treatment protocol exclusively for doctors with less ICH expertise working in emergency rooms should be part of establishing this system. Difficulties arise in providing appropriate early treatment for ICH in rural and underserved areas before the patient is transferred to a nearby hub hospital with stroke specialists. This has been an unmet medical need for decade. The available reporting ICH guidelines are realistically possible in university hospitals with a well-equipped infrastructure. However, it is very difficult for doctors inexperienced with ICH treatment to appropriately select and deliver ICH treatment based on the guidelines. To address these issues, we developed an ICH telemedicine protocol. Neurosurgeons from four university hospitals in Gangwon state first wrote the guidelines, and professors with extensive ICH expertise across the country revised them. Guidelines and recommendations for ICH management were described as simply as possible to allow more doctors to use them easily. We hope that our effort in developing the telemedicine protocols will ultimately improve the quality of ICH treatment in local emergency rooms in rural and underserved areas in Gangwon state.

Acute Respiratory Failure in Severe Acute Brain Injury

Acute respiratory failure is commonly encountered in severe acute brain injury due to a multitude of factors related to the sequelae of the primary injury. The interaction between pulmonary and neurologic systems in this population is complex, often with competing priorities. Many treatment modalities for acute respiratory failure can result in deleterious effects on cerebral physiology, and secondary brain injury due to elevations in intracranial pressure or impaired cerebral perfusion. High-quality literature is lacking to guide clinical decision-making in this population, and deliberate considerations of individual patient factors must be considered to optimize each patient's care.

Initial Diagnosis and Management of Acutely Elevated Intracranial Pressure

Acutely elevated intracranial pressure (ICP) may have devastating effects on patient mortality and neurologic outcomes, yet its initial detection remains difficult because of the variety of manifestations that it can cause disease states it is associated with. Several treatment guidelines exist for specific disease processes such as trauma or ischemic stroke, but their recommendations may not apply to other causes. In the acute setting, management decisions must often be made before the underlying cause is known. In this review, we present an organized, evidence-based approach to the recognition and management of patients with suspected or confirmed elevated ICP in the first minutes to hours of resuscitation. We explore the utility of invasive and noninvasive methods of diagnosis, including history, physical examination, imaging, and ICP monitors. We synthesize various guidelines and expert recommendations and identify core management principles including noninvasive maneuvers, neuroprotective intubation and ventilation strategies, and pharmacologic therapies such as ketamine, lidocaine, corticosteroids, and the hyperosmolar agents mannitol and hypertonic saline. Although an in-depth discussion of the definitive management of each etiology is beyond the scope of this review, our goal is to provide an empirical approach to these time-sensitive, critical presentations in their initial stages.

Pharmacotherapy optimization for rapid sequence intubation in the emergency department

PURPOSE

Rapid-sequence intubation (RSI) is the process of administering a sedative and neuromuscular blocking agent (NMBA) in rapid succession to facilitate endotracheal intubation. It is the most common and preferred method for intubation of patients presenting to the emergency department (ED). The selection and use of medications to facilitate RSI is critical for success. The purpose of this review is to describe pharmacotherapies used during the RSI process, discuss current clinical controversies in RSI medication selection, and review pharmacotherapy considerations for alternative intubation methods.

SUMMARY

There are several steps to the intubation process requiring medication considerations, including pretreatment, induction, paralysis, and post-intubation sedation and analgesia. Pretreatment medications include atropine, lidocaine, and fentanyl; but use of these agents in clinical practice has fallen out of favor as there is limited evidence for their use outside of select clinical scenarios. There are several options for induction agents, though etomidate and ketamine are the most used due to their more favorable hemodynamic profiles. Currently there is retrospective evidence that etomidate may produce less hypotension than ketamine in patients presenting with shock or sepsis. Succinylcholine and rocuronium are the preferred neuromuscular blocking agents, and the literature suggests minimal differences between succinylcholine and high dose rocuronium in first-pass success rates. Selection between the two is based on patient specific factors, half-life and adverse effect profiles. Finally, medication-assisted preoxygenation and awake intubation are less common methods for intubation in the ED but require different considerations for medication use.

AREAS FOR FUTURE RESEARCH

The optimal selection, dosing, and administration of RSI medications is complicated, and further research is needed in several areas. Additional prospective studies are needed to determine optimal induction agent selection and dosing in patients presenting with shock or sepsis. Controversy exists over optimal medication administration order (paralytic first vs induction first) and medication dosing in obese patients, but there is insufficient evidence to significantly alter current practices regarding medication dosing and administration. Further research examining awareness with paralysis during RSI is needed before definitive and widespread practice changes to medication use during RSI can be made.

Rapid sequence intubation and the role of the emergency medicine pharmacist: 2022 update

PURPOSE

The dosing, potential adverse effects, and clinical outcomes of the most commonly utilized pharmacologic agents for rapid sequence intubation (RSI) are reviewed for the practicing emergency medicine pharmacist (EMP).

SUMMARY

RSI is the process of establishing a safe, functional respiratory system in patients unable to effectively breathe on their own. Various medications are chosen to sedate and even paralyze the patient to facilitate an efficient endotracheal intubation. The mechanism of action and pharmacokinetic/pharmacodynamic profiles of these agents were described in a 2011 review. Since then, the role of the EMP as well as the published evidence regarding RSI agents, including dosing, adverse effects, and clinical outcomes, has grown. It is necessary for the practicing EMP to update previous practice patterns in order to continue to provide optimal patient care.

CONCLUSION

While the agents used in RSI have changed little, knowledge regarding optimal dosing, appropriate patient selection, and possible adverse effects continues to be gained. The EMP is a key member of the bedside care team and uniquely positioned to communicate this evolving data.

A Pediatric Emergency Medicine Refresher Course for Generalist Healthcare Providers in Belize: Respiratory Emergencies

Audience and type of curriculum

This is a refresher curriculum utilizing multiple methods of education to augment the skills of generalist healthcare providers in low- and middle-income countries (LMICs) in the identification and stabilization of pediatric respiratory emergencies. Our audience of implementation was Belizean generalist providers.

Length of curriculum

Nine hours.

Introduction

In the pediatric population, early recognition and stabilization can improve patient outcomes. Compared with many Western systems that rely on specialists and even subspecialists, in many lower-resource settings, generalists provide most emergency medical care. The purpose of this module is to present a curriculum focused on the identification and stabilization of common pediatric respiratory emergencies for general practitioners (physicians and nurses) working in the acute care setting. Our aim is to provide a care framework and refresher training for the management of pediatric respiratory emergencies for providers who may regularly see the acutely ill pediatric patient but who may not have had recent or any extensive teaching in the management of acute pediatric airway management, bronchiolitis, pneumonia, and asthma.

Educational Goals

This curriculum presents a refresher course in recognizing and stabilizing pediatric acute respiratory complaints for generalist healthcare providers practicing in LMICs. Our goal is to implement this curriculum in the small LMIC of Belize. This module focuses on common respiratory complaints, including asthma, bronchiolitis, pneumonia and acute airway management.

Educational Methods

The educational strategies used in this curriculum include didactic lectures, medical simulation, small-group sessions, and a skills lab.

Research Methods

We scored written pretests before and posttests after intervention and retested participants to evaluate for knowledge retention. Participants provided qualitative feedback on the module.

Results

We taught 26 providers. Twenty-one providers completed the posttest and eight completed the retest. The mean test scores improved from 8.3 ± 2.8 in the pretest to 9.7 ± 1.3 to the posttest (mean difference = 1.4; P = 0.027). The mean test score at pretest was 8.0 ± 4.0, which increased to 9.9 ± 2.5 at retest four months later (mean difference = 1.9, P = 0.049). Fifteen (71.4%) participants found the course "extremely useful," and 28 (28.5%) participants "very useful."

Discussion

This curriculum is an effective and well-received training tool for Belizean generalist providers. Although limited by sample size and 20% attrition for the retest, there was a statistically significant improvement in test performance. We believe that our pilot in Belize shows that this type of refresher course could be useful for teaching generalist providers in LMICs to optimize care of the acutely ill pediatric patient with respiratory ailment. Evaluation of other modules in this curriculum, application of the curriculum in other locations, and measuring clinical patient outcomes will be included in future investigations.

Topics

Medical simulation, rapid cycle deliberate practice (RCDP), Belize, bronchiolitis, pneumonia, asthma, airway, respiratory distress, low- and middle-income country (LMIC), collaboration, global health.

Sedation for Rapid Sequence Induction and Intubation of Neurologically Injured Patients

There are subtle physiologic and pharmacologic principles that should be understood for patients with neurologic injuries. These principles are especially true for managing patients with traumatic brain injuries. Prevention of hypotension and hypoxemia are major goals in the management of these patients. This article discusses the physiology, pitfalls, and pharmacology necessary to skillfully care for this subset of patients with trauma. The principles endorsed in this article are applicable both for patients with traumatic brain injury and those with spinal cord injuries.

Rapid Sequence Intubation in Traumatic Brain-injured Adults

Deciding on proper medication administration for the traumatic brain injury (TBI) patient undergoing intubation can be daunting and confusing. Pretreatment with lidocaine and/or vecuronium is no longer recommended; however, high-dose fentanyl can be utilized to help blunt the sympathetic stimulation of intubation. Induction with etomidate is recommended; however, ketamine can be considered in the proper patient population, such as those with hypotension. Paralysis can be performed with either succinylcholine or rocuronium, with the caveat that rocuronium can lead to delays in proper neurological examinations due to prolonged paralysis. Recommendations for post-intubation continuous sedation medications include a combination propofol and fentanyl in the normotensive/hypertensive patient population. A combination midazolam and fentanyl or ketamine alone can be considered in the hypotensive patient.

Exam 1 Questions

Which of the following is the most common form of incomplete spinal cord injury?A.

Central cord syndrome

B.

Cauda equina syndrome

C.

Anterior spinal cord syndrome

D.

Posterior spinal cord syndrome

E.

Brown-Sequard lesion

A 64-year-old male with a history of chronic alcohol abuse and congestive heart failure is currently recovering from excision of a large right shoulder lesion suspicious for melanoma. Postoperatively, he is experiencing bleeding and oozing from his surgical site that has persisted despite suture repair and direct pressure for an extended period of time. His labs are drawn, and are as follows: platelets 141 × 10³/mL, INR 1.2, fibrinogen 90 mg/dL. Which of the following blood products should be administered next?A.

Fresh frozen plasma

B.

Cryoprecipitate

C.

Prothrombin complex concentrate

D.

Recombinant activated factor VII

E.

Aminocaproic acid

A 75-year-old, 90 kg male with a history of peripheral vascular disease, coronary artery disease, and epilepsy following a recent cerebral infarction presents to the emergency department after having three witnessed seizures at home. He was intubated at the scene by the paramedics, and received 8 mg of intravenous lorazepam and 1 g of phenytoin. While you are evaluating him, he has another generalized tonic-clonic seizure, and the nurse asks if you would like to initiate a continuous propofol infusion. His blood pressure is 94/42 mmHg, and he is having numerous premature ventricular contractions (PVCs) on the electrocardiographic monitor. He has no history of platelet or liver dysfunction. Which of the following should be performed next?A.

Complete the phenytoin load to attain 20 mg/kg, then start propofol infusion

B.

Complete the phenytoin load to attain 20 mg/kg only

C.

Administer valproate, 30 mg/kg over 10 min, as well as midazolam 0.2 mg/kg

D.

Start immediate midazolam infusion at 2 mg/kg/h

E.

Give a 1 L normal saline bolus, and start a norepinephrine infusion to normalize blood pressure

A 38-year-old male is brought to the emergency department after a motor vehicle accident. He is found to have significant ecchymoses on his chest and face, with multiple apparent rib fractures. He is in mild respiratory distress, with an oxygen saturation of 89% on room air, and hypotensive, with a systolic blood pressure of 88 mmHg. He has absent breath sounds on the right side. There is currently a delay in obtain a bedside portable chest x-ray. Which of the following should be performed next?A.

28-French chest tube placement

B.

16-French chest tube placement

C.

Obtain computed tomography (CT) of the chest

D.

Administer 30 cc/kg crystalloid

E.

Obtain urgent cardiothoracic surgery consult

Stress ulcer prophylaxis is often undertaken to prevent clinically important upper gastrointestinal (GI) bleeding. Which of the following factors puts patients at highest risk for such bleeding episodes?A.

Respiratory failure

B.

History of alcohol abuse

C.

NPO status

D.

Diverticulitis

E.

All of the above

In an intact heart, the Frank-Starling mechanism describes contractility increases in responses to:A.

Decreased preload

B.

Increased afterload

C.

Decreased left ventricular end-diastolic pressure

D.

Increased left ventricular end-diastolic volume

E.

Increased pulmonary vascular resistance

A 68-year-old female with a history of hyperlipidemia, hypothyroidism, and gastric cancer on total parenteral nutrition is currently in the ICU following a small traumatic subdural hemorrhage. On hospital day 5, the patient begins to spike fevers that persist despite broad spectrum antibiotic coverage with vancomycin and piperacillin-tazobactam. She is otherwise hemodynamically stable. The lab calls you to notify you that multiple sets of blood cultures display budding yeast forms and pseudohyphae. Which of the following should be administered next?A.

Fluconazole

B.

Posaconazole

C.

Anidulafungin

D.

Caspofungin

E.

Amphotericin B

A 56-year-old male with a past medical history of hypertension, hyperlipidemia, and morbid obesity is currently intubated in the ICU following a left middle cerebral artery infarct. The respiratory therapist alerts you the fact that the patient has become markedly dysynchronous with the ventilator, including breath holding episodes, breath stacking, and resisting ventilator-delivered breaths. A variety of pressure- and volume-regulated ventilator modes have been attempted without improvement, as well as boluses of both fentanyl and midazolam. The most recent arterial blood gas is as follows: pH 7.19, PaCO₂ 78 mmHg, PaO₂ 61 mmHg. The patient is now hypotensive to 91/66 mmHg with sinus tachycardia at 117 beats/min. A recent bedside chest x-ray shows no consolidation or pneumothorax. Which of the following should be performed next?A.

Prone the patient

B.

Administer nitric oxide at 10 parts per million

C.

Administer 10 mg of cisatracurium

D.

Administer a mixture of 60% helium/40% oxygen

E.

Administer a continuous infusion of phenobarbital

Compared to lactulose for the treatment of hepatic encephalopathy, polyethylene glycol (PEG) has been shown to:A.

Decrease in-hospital mortality

B.

More rapidly improve symptoms

C.

Increase the rate of gastrointestinal complications

D.

Increase the incidence of major electrolyte abnormalities

E.

None of the above

Which of the following neurologic insults is the least likely to cause central (non-infectious) fever in the ICU?A.

Intracranial neoplasm

B.

Intraventricular hemorrhage

C.

Normal pressure hydrocephalus

D.

Subarachnoid hemorrhage

E.

Traumatic brain injury

A 57-year-old male with a history of epilepsy and medication noncompliance is admitted to a small community hospital after a brief tonic-clonic seizure. A non-contrast head CT on admission is normal. On the second hospital day, the patient begins to complain of severe substernal chest pressure, and an urgent bedside EKG shows evidence of an acute inferior myocardial infarction (MI). The nearest percutaneous coronary intervention (PCI) capable center is approximately 150 min away by the fastest transport method available. Which of the following is the most appropriate next step in this patient’s care?A.

Arrange for transport to the closest PCI center with anticipated balloon time within 30 min of arrival

B.

Prepare to administer fibrinolytic therapy

C.

Consult cardiothoracic surgery for possible coronary artery bypass grafting (CABG)

D.

Place the patient on a continuous nitroglycerine infusion and administer aspirin, clopidogrel, and heparin

E.

Await serum cardiac biomarkers and repeat EKG in 1 h

A 62-year-old male with unknown past medical history who recently immigrated from El Salvador is currently in the stroke unit after suffering from an acute left middle cerebral artery infarction. The patient is aphasic; his wife states that he been in his usual state of health lately, and denies any recent weakness, dizziness, chest pain, cough, shortness of breath, or fevers. On reviewing this patient’s belongings, the nurse discovers a bottle of isoniazid, as well as paperwork demonstrating a positive quantiferon gold test performed at a local clinic approximately 3 weeks ago. He does not appear to be on any other medications. A bedside portable chest x-ray is performed, which preliminarily appears normal. Which of the following should be performed next?A.

Move the patient to a negative pressure isolation room, continue isoniazid

B.

Isolate the patient, continue isoniazid, add rifampin

C.

Isolate the patient, continue isoniazid, add rifampin and pyrazinamide

D.

Isolate the patient, continue isoniazid, add rifampin, pyrazinamide and ethambutol

E.

None of the above

A 56-year-old, 70 kg female patient in oliguric renal failure would be expected to have a daily urine output of:A.

No more than 50 mL

B.

No more than 400 mL

C.

No more than 800 mL

D.

Less than 70 mL/h

E.

Less than 35 mL/h

A 37-year-old female with a history of epilepsy is admitted to the ICU with status epilepticus. She required several doses of lorazepam in the emergency department in addition to fosphenytoin, intubation, and a continuous propofol infusion. There was concern for aspiration in the prehospital setting. Approximately 3 days after being admitted to the hospital, her respiratory status has worsened; she is increasingly hypoxic, and her chest x-ray demonstrates diffuse bilateral interstitial infiltrates. The patient is afebrile with minimal secretions. Her most recent arterial blood gas is as follows: pH 7.21, PaO₂ 107 mmHg, PCO₂ 55 mmHg, 100% FiO₂, and a positive end-expiratory pressure (PEEP) of 8 cm H₂O. According to the Berlin criteria, how would you categorize this patient’s acute respiratory distress syndrome (ARDS)?A.

Acute lung injury (ALI)

B.

Mild ARDS

C.

Moderate ARDS

D.

Severe ARDS

E.

None of the above

An 80-year-old male presents to the emergency department with multiple episodes of bright red blood per rectum. He is on aspirin and clopidogrel for a history of coronary artery disease and a previous transient ischemic attack. He underwent aortic graft surgery for repair of an abdominal aortic aneurysm 2 years ago. A complete blood count and coagulation profile are all within normal limits. His vital signs are as follows: blood pressure 102/58 mmHg, heart rate 98 beats/min, respiratory rate 18 breaths/min, oxygen saturation 98% on room air, and temperature 98.3 °F. Which of the following is the next best step in the care of this patient?A.

Transfuse platelets, fresh frozen plasma, and recombinant factor VIIa

B.

Consult gastroenterology for emergent upper endoscopy

C.

Consult gastroenterology for emergent colonoscopy

D.

CT angiogram of the abdomen and pelvis

E.

Expectant management with fluids and blood transfusions

A thrombus in which of the following veins would not be considered a deep vein thrombosis (DVT)?A.

Popliteal vein

B.

Soleal vein

C.

Femoral vein

D.

Gastrocnemius vein

E.

Greater saphenous vein

After partial resection of the pituitary stalk, secretion of which of the following hormones will be most affected?A.

Oxytocin

B.

Adrenocorticotrophic hormone

C.

Melanocyte-stimulating hormone

D.

Thyroid-stimulating hormone

E.

All will be equally affected

A 58-year-old female with a history of hypertension, rheumatoid arthritis, metastatic ovarian cancer, and bilateral deep venous thrombosis status post recent inferior vena cava filter placement presents to the emergency department with right flank pain. She states the pain began approximately 1 h ago when bending down to pick something off the floor, and that it is constant and severe in nature. She denies dysuria or hematuria. Her vital signs are as follows: blood pressure 108/62 mmHg, heart rate 121 beats/min, respiratory rate 20 breaths/min, oxygen saturation 99% on room air, and temperature 99.6 °F. A CT scan of the abdomen is obtained (see Image 1). Which of the following is the next best step in this patient’s management?A.

Administer vancomycin and cefepime, and draw two sets of blood cultures

B.

Urgent vascular surgery consult

C.

Immediately place the patient on her left side

D.

Rapid sequence intubation with mechanical ventilation

E.

Perform bedside diagnostic peritoneal lavage

Neurotrauma

Neurotrauma continues to be a significant cause of morbidity and mortality. Prevention of primary neurologic injury is a critical public health concern. Early and thorough assessment of the patient with neurotrauma with high index of suspicion of traumatic spinal cord injuries and traumatic vascular injuries requires a multidisciplinary approach involving prehospital providers, emergency physicians, neurosurgeons, and neurointensivists. Critical care management of the patient with neurotrauma is focused on the prevention of secondary injuries. Much research is still needed for potential neuroprotection therapies.

A standardized rapid sequence intubation protocol facilitates airway management in critically injured patients

BACKGROUND

In the emergency department (ED) of a teaching hospital, rapid sequence intubation (RSI) is performed by physicians with a wide range of experience. A variety of medications have been used for RSI, with potential for inadequate or excessive dosing as well as complications including hypotension and the need for redosing. We hypothesized that the use of a standardized RSI medication protocol has facilitated endotracheal intubation requiring less medication redosing and less medication-related hypotension.

METHODS

An RSI medication protocol (ketamine 2 mg/kg intravenously administered and rocuronium 1 mg/kg intravenously administered, or succinylcholine 1.5 mg/kg intravenously administered) was implemented for all trauma patients undergoing ED intubation at a Level I trauma center. We retrospectively reviewed patients for the 1-year period before (PRE) and after (KET) the protocol was instituted. Data collected included age, sex, Injury Severity Score (ISS), Abbreviated Injury Scale (AIS) score of the head/face, AIS score of the chest, RSI drugs, need for redosing, time to intubation, indication for RSI, and number of RSI attempts.

RESULTS

During the study period, 439 patients met inclusion criteria; 266 without protocol (PRE) and 173 with protocol (KET). Patients were severely injured with a mean ISS of 24 and median AIS score of the head/face of 3. Dosing in the KET group was appropriate with a mean dose of 1.9-mg/kg ketamine administered. Compliance after KET introduction approached 90%. Fifteen patients in the PRE group required redosing of medication versus three in the KET group (p < 0.05, χ). For patients younger than 14 years, (26 in PRE and 10 in KET), 2 patients in the PRE group required redosing and none in the KET group (not significant). In all patients, mean time from drug administration to intubation decreased from 4 minutes to 3 minutes.

CONCLUSION

A standardized medication protocol simplifies RSI and allows efficient airway management of critically injured trauma patients in the ED of a teaching hospital. Incorporation of ketamine avoids potential complications of other commonly used RSI medications.

LEVEL OF EVIDENCE

Therapeutic study, level IV.

Pharmacological agents for preventing morbidity associated with the haemodynamic response to tracheal intubation

BACKGROUND

Several drugs have been used in attenuating or obliterating the response associated with laryngoscopy and tracheal intubation. These changes are of little concern in relatively healthy patients but can lead to morbidity and mortality in the high risk patient population.

OBJECTIVES

The primary objective of this review was to determine the effectiveness of pharmacological agents in preventing the morbidity and mortality resulting from the haemodynamic changes in response to laryngoscopy and tracheal intubation in adult patients aged 18 years and above who were undergoing elective surgery in the operating room setting.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (2011, Issue 6), MEDLINE (1950 to June 2011), EMBASE (1980 to June 2011), and the bibliographies of published studies. We reran our search from June 2011 to December 2012 and will deal with these studies when we update the review.

SELECTION CRITERIA

We included randomized controlled trials (RCTs) that compared a drug used as an intervention for preventing or attenuating the haemodynamic response to tracheal intubation to a control group, and that mentioned mortality, major morbidity, arrhythmia or electrocardiogram (ECG) evidence of ischaemia in the methodology, results, or discussion section of the reports.

DATA COLLECTION AND ANALYSIS

Two authors independently assessed trial quality and extracted the outcome data.

MAIN RESULTS

We included 72 RCTs. The included trials studied the effects of 32 drugs belonging to different pharmacological groups. Only two trials mentioned the primary outcome of morbidity and mortality related to the haemodynamic response to tracheal intubation. Of the secondary outcomes, 40 of the included trials observed arrhythmia only, 11 observed myocardial ischaemia only and 20 observed both arrhythmias and myocardial ischaemia. Arrhythmias were observed in 2932 participants and myocardial ischaemia in 1616 participants. Arrhythmias were observed in 134 out of 993 patients in the control group compared to 80 out of 1939 in the intervention group. The risk of arrhythmias was significantly reduced with pharmacological interventions in the pooled data (Peto odds ratio (OR) 0.19, 95% CI 0.14 to 0.26, P < 0.00001, I(2)= 47%). Local anaesthetics, calcium channel blockers, beta blockers and narcotics reduced the risk of arrhythmia in the intervention group compared to the control group. Myocardial ischaemia was observed in 21 out of 604 patients in the control group compared to 10 out of 1012 in the treatment group; the result was statistically significant (Peto OR 0.45, 95% CI 0.22 to 0.92, P = 0.03, I(2) = 19%). However, in subgroup analysis only local anaesthetics significantly reduced the ECG changes indicating ischaemia, but this evidence came from one study. The majority of the studies had a negative outcome. Hypotension and bradycardia were reported with 40 µg kg(-1) intravenous alfentanil, chest rigidity with 75 ug kg(-1) alfentanil, and increased bronchomotor tone with sympathetic blockers.There were 17 studies which included high risk patients. Pharmacological treatment in this group resulted in the reduction of arrhythmias when the data from nine trials looking at arrhythmias were pooled (Peto OR 0.18, 95% CI 0.05 to 0.59, P = 0.005, I(2) = 80%). The analysis from four studies was not included. Three of these trials looked at the effect of sympathetic blockers but arrhythmias or myocardial ischaemia was observed throughout the perioperative period in two studies and some patients had arrhythmias due to atropine premedication in the third study. In the fourth study the authors mentioned myocardial ischaemia in the objectives section but did not report it in the results.

AUTHORS' CONCLUSIONS

The risk of arrhythmias associated with tracheal intubation was significantly reduced with pre-induction administration of local anaesthetics, calcium channel blockers, beta blockers and narcotics compared to placebo. Pharmacological intervention also reduced the risk of ECG evidence of myocardial ischaemia in the pooled data. Lignocaine pretreatment showed a significant effect but evidence came from one study only. The data suggested that there may be a reduction in ECG evidence of myocardial ischaemia with beta blocker pretreatment but this difference was not statistically significant. There is a need to focus on outcomes rather than haemodynamic measurements alone when studying this response in future trials.

Moderate and severe traumatic brain injury: pathophysiology and management

Traumatic brain injury (TBI) is a serious disorder that is all too common. TBI ranges in severity from mild concussion to a severe life-threatening state. Across this spectrum, rational therapeutic approaches exist. Early identification that TBI has occurred in a patient is paramount to optimal outcome. Proper clinical management should be instituted as soon as possible by appropriately trained medical providers. More seriously injured patients must be triaged to advanced care centers. It is only through this rational approach to TBI that patients may expect to achieve optimal clinical and functional outcome.

Perioperative management of the pediatric patient with traumatic brain injury

TBI and its sequelae remain a major healthcare issue throughout the world. With an improved understanding of the pathophysiology of TBI, refinements of monitoring technology, and ongoing research to determine optimal care, the prognosis of TBI continues to improve. In 2003, the Society of Critical Care Medicine published guidelines for the acute management of severe TBI in infants, children, and adolescents. As pediatric anesthesiologists are frequently involved in the perioperative management of such patients including their stabilization in the emergency department, familiarity with these guidelines is necessary to limit preventable secondary damage related to physiologic disturbances. This manuscript reviews the current evidence-based medicine regarding the care of pediatric patients with TBI as it relates to the perioperative care of such patients. The issues reviewed include those related to initial stabilization, airway management, intra-operative mechanical ventilation, hemodynamic support, administration of blood and blood products, positioning, and choice of anesthetic technique. The literature is reviewed regarding fluid management, glucose control, hyperosmolar therapy, therapeutic hypothermia, and corticosteroids. Whenever possible, management recommendations are provided.

The role of the emergency pharmacist in trauma resuscitation

The clinical pharmacist in the emergency department is now commonly incorporated as a member of the emergency department trauma team. As such, the emergency pharmacist needs to have detailed knowledge of the pharmacotherapy of resuscitation and be able to apply the skills needed to function as a valuable member of this team. In addition to the traditional skills of the discipline of clinical pharmacy, the emergency pharmacist must be familiar with the intricacies of treating life-threatening injuries in an emergent setting and be able to anticipate the direction of the patient's care. The ability to provide valuable pharmacological interventions throughout the resuscitation and stabilization process requires familiarity with the process of resuscitation, including rapid sequence induction, analgesia and sedation, seizure prophylaxis, appropriate antibiotic and tetanus prophylaxis, intracranial pressure control, hemodynamic stabilization, and any other specific drug therapy that the clinical situation demands. This article discusses the aforementioned pharmacotherapeutic topics and describes the role of the Emergency Pharmacist on the ED trauma team.

Clinical review: Critical care management of spontaneous intracerebral hemorrhage

Intracerebral hemorrhage is by far the most destructive form of stroke. The clinical presentation is characterized by a rapidly deteriorating neurological exam coupled with signs and symptoms of elevated intracranial pressure. The diagnosis is easily established by the use of computed tomography or magnetic resonance imaging. Ventilatory support, blood pressure control, reversal of any preexisting coagulopathy, intracranial pressure monitoring, osmotherapy, fever control, seizure prophylaxis, treatment of hyerglycemia, and nutritional supplementation are the cornerstones of supportive care in the intensive care unit. Dexamethasone and other glucocorticoids should be avoided. Ventricular drainage should be performed urgently in all stuporous or comatose patients with intraventricular blood and acute hydrocephalus. Emergent surgical evacuation or hemicraniectomy should be considered for patients with large (>3 cm) cerebellar hemorrhages, and in those with large lobar hemorrhages, significant mass effect, and a deteriorating neurological exam. Apart from management in a specialized stroke or neurological intensive care unit, no specific medical therapies have been shown to consistently improve outcome after intracerebral hemorrhage.

No evidence for decreased incidence of aspiration after rapid sequence induction

PURPOSE

The purpose of this structured, evidence-based, clinical update was to determine if rapid sequence induction is a safe or effective technique to decrease the risk of aspiration or other complications of airway management.

SOURCE

In June 2006 a structured search of MEDLINE from 1966 to present using OVID software was undertaken with the assistance of a reference librarian. Medical subject headings and text words describing rapid sequence induction or intubation (RSI), crash induction or intubation, cricoid pressure and emergency airway intubation were employed. OVID's therapy (sensitivity) algorithm was used to maximize the detection of randomized trials while excluding non-randomized research. The bibliographies of eligible publications were hand-searched to identify trials not identified in the electronic search.

PRINCIPAL FINDINGS

A total of 184 clinical trials were identified of which 163 were randomized controlled trials (RCTs). Of these clinical trials, 126 evaluated different drug regimens with 114 being RCTs. Only 21 clinical trials evaluated non-pharmacologic aspects of the RSI with 18 RCTs identified. A parallel search found 52 trials evaluating cricoid pressure (outside of the context of an RSI technique) with 44 classified as RCTs. Definitive outcomes such as prevention of aspiration and mortality benefit could not be evaluated from the trials. Likewise, the impact on adverse outcomes of the different components of RSI could not be ascertained.

CONCLUSION

An absence of evidence from RCTs suggests that the decision to use RSI during management can neither be supported nor discouraged on the basis of quality evidence.

Head trauma

Head trauma is a common and devastating injury. Along with a high mortality rate, the long-term morbidity is consequential for both the individual patient and society. A thorough knowledge of the clinical approach will assist the emergency physician in providing optimal care and helping to minimize secondary brain injury. Using a case-based scenario, the initial management strategies along with rational evidence-based treatments are reviewed.

Controversies in rapid sequence intubation in children

PURPOSE OF REVIEW

Rapid sequence intubation is the method of choice for intubation of the emergency department patient. The purpose of the present review is to address several controversies pertaining to emergency department rapid sequence intubation of children.

RECENT FINDINGS

The topics covered in this review include the determination of the appropriate clinician to perform emergency department intubation, the use of atropine and lidocaine as premedications, the choice of sedative agents depending upon the clinical scenario, and the choice of neuromuscular blockade agent. Concerning these topics: The literature supports that emergency department physicians, with appropriate training, successfully perform intubation in most patients. Limited data exist to determine the appropriate use of atropine and lidocaine for rapid sequence intubation. Etomidate has clearly become a preferred sedative for rapid sequence intubation with a low risk of cardiovascular side effects. Thiopental and propofol may more readily provide adequate sedation as compared with etomidate but both have the potential to reduce blood pressure. Succinylcholine arguably remains the preferred neuromuscular blockade agent for rapid sequence intubation in most children. The side effects of succinylcholine occur in relatively predictable circumstances. Rocuronium is a commonly used nondepolarizing paralytic agent but its prolonged duration of action must be weighed against the risk of side effects associated with succinylcholine.

SUMMARY

Though more research is needed, the available data allow for the development of protocols that will result in a rational, scenario-based approach to rapid sequence intubation in children.

Emergency airway management--experience of a tertiary hospital in South-East Asia

OBJECTIVE

To study the indications and diagnoses of patients requiring emergency airway management and to evaluate the adequacy of airway management skills of emergency physicians.

METHODS

Prospective observational study of all patients requiring advanced airway management from 1 November 1998 to 31 October 2002.

RESULTS

There were 1068 cases, 710 (66.5%) were men. The median age was 63 years. The most common diagnoses requiring tracheal intubation were cardiopulmonary arrest (37.7%), congestive heart failure (20.8%) and head injury (8.3%). The main indications were apnoea (42.5%), hypoxia (21.3%) and prophylactic airway protection (17.6%). Orotracheal intubation with no medication was most common (51.5%) followed by rapid sequence induction (RSI) (28.4%) and orotracheal intubation with sedation only (19.6%). The overall success rate for orotracheal intubation was 99.6%. The cricothyrotomy rate was 0.2%. Hypotension (4.2%), multiple intubation attempts (1.9%) and oesophageal intubation (1.5%) were the three most common peri-intubation complications. There was no statistical difference in the occurrence of hypotension between the use of midazolam and etomidate for sedation or induction prior to intubation. Six hundred and forty-six (60.5%) patients survived the immediate post-resuscitation period. No patient died from failure to secure the airway.

CONCLUSION

Airway management and rapid sequence induction for intubation can be safely performed by emergency physicians.

Cerebral pathophysiology and critical care neurology: basic hemodynamic principles, cerebral perfusion, and intracranial pressure

Pediatric neurologic intensive care differs from standard pediatric intensive care in two important respects. First, the diagnosis, monitoring, and management of problems related to disorders of cerebral perfusion and intracranial pressure (ICP) are central to nearly all of pediatric neurologic and neurosurgical intensive care. Second, various clinical problems normally encountered in the intensive care unit (ICU) have additional implications when associated with neurologic disease. Regardless of the cause, treatment should be undertaken as expeditiously as possible and should be based on the principles of resuscitation, reducing the volume of the intracranial contents, and reassessment. This chapter aims to outline some basic principles underlying the diagnosis and management of elevated ICP in children.

Trauma airway experience by emergency physicians

The objective of this study was to evaluate the success rates of endotracheal intubation of trauma patients by emergency physicians and to determine if there are areas in which the care of these patients could be improved. This was a retrospective observational study of 142 major trauma patients who required advanced airway management. The median age was 32 years and 74% of the patients were men. Fifty per cent had isolated head injury. The main indications for intubation were a Glasgow Coma Score of less than 9 (40.1%), trauma arrest (24.6%), and prophylactic protection of the airway (10.6%). Emergency physicians successfully intubated 90.8% of the patients. The pretreatment of head-injured patients with lignocaine was performed in only six out of 66 indicated cases (9.1%). The complication rate was 23.2%. Hypotension occurred in 22.9% of cases treated with midazolam, and was more common than in those who were intubated without a sedating agent [odds ratio (OR) 3.108; 95% confidence interval (CI) 1.060, 9.109].

Critical care issues in stroke and subarachnoid hemorrhage

The outcomes of devastating neurological emergencies such as stroke and subarachnoid hemorrhage may be measurably improved by timely treatment in a neurointensive care unit (NICU). Optimal care requires a multidisciplinary approach, with attention to a wide range of treatment issues. This review examines the key therapeutic concerns in the NICU management of acute ischemic and hemorrhagic stroke and subarachnoid hemorrhage, including mechanical ventilation, blood pressure management, cardiac monitoring, intracranial pressure assessment, vasospasm, seizures, sedation, fluids, electrolytes, and nutrition. The discussion of mechanical ventilation includes rapid sequence induction and intubation, indication for intubation and extubation, and prognostic factors in mechanical ventilation. Differing blood pressure management concerns in hemorrhagic and ischemic events are discussed, and specific target blood pressures and pharmacologic interventions are reviewed. The discussion of cardiac monitoring includes concurrent stroke and cardiac ischemia and arrhythmias, cardiac imaging, anticoagulation, and vasopressor therapy. The importance, monitoring and management of cerebral blood flow and intracranial pressure (ICP) are discussed, and strategies for treatment of elevated ICP are outlined in detail. The discussion of vasospasm includes evaluation, prophylaxis, and treatment with medications, hypervolemic hemodilution, and angioplasty. Management of seizure and status epilepticus in stroke and subarachnoid hemorrhage are reviewed and current algorithms are presented. The management of fluids, electrolytes and enteral nutrition are also reviewed.