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Critical Care Update 2009
Vineet Nayyar, JV Peter, Roop Kishen, S Srinivas
SECTION A: MANPOWER
ONE:
Manpower in Critical Care—Global Issues
INTRODUCTION
WHAT DO WE MEAN BY CRITICAL CARE
CONCERNS ABOUT STAFFING ISSUES IN ICUs
FACTORS AFFECTING PHYSICIAN SUPPLY
Trainees’ Working Hours
Burnout in Critical Care
Changing Demography of Medical School Intake
Quality and Safety
Attrition
FUTURE DIRECTIONS
TWO:
Teamwork and Leadership
INTRODUCTION
Work Group
Action Teams
TEAMWORK IN HEALTH CARE
ENHANCING TEAM PERFORMANCE
Shared Cognition
Team Training
Organizational Culture
EFFECTIVE LEADERSHIP
Adaptive Leadership
Situational Awareness
Decision-making
Conflict
CONCLUSION
THREE:
Shift Work and its Effect upon Staff Performance
INTRODUCTION
PATTERNS OF SLEEP DEPRIVATION
SHIFT WORK, MEDICAL ERROR AND ATTENTIONAL FAILURES
PERFORMANCE DEFICIT FOLLOWING SLEEP DEPRIVATION
Effect of Sleep Deprivation upon Driving Performance
Objective Assessment of Performance Following Sleep Deprivation
Individual Susceptibility to Sleep Deprivation
ADAPTATION TO SHIFT WORK
Phase Response Curves
Use of Melatonin for Shift Work Adaptation
The Use of Bright Light for Shift Work Adaptation
Napping Strategies
CONCLUSION
FOUR:
Burn Out Syndrome in the Health Care Environment
INTRODUCTION
GROUPS AT RISK
FEATURES OF BURN OUT
Warning Signs of BOS
Symptoms
Doctors and Nurses
Tools to Study BOS
WHAT CAN BE DONE
Enhancing Personal Worth and Accomplishment
Avoiding Emotional Exhaustion
Managing Death and the Dying Patient
PREVENTION
Organizational Measures
Themes Associated with Low Likelihood of BOS
CONCLUSION
SECTION B: AIRWAY AND VENTILATION
FIVE:
Cricothyrotomy for Emergency Airway
INTRODUCTION
DECIDING TO DO IT
WHAT TO USE HOW TO USE IT
Anatomy
Techniques Available
Needle Cricothyrotomy and Transtracheal Jet Ventilation
Surgical Cricothyrotomy
Commercial Kit Cannulation—Such as the Melker Cricothyrotomy Kit from Cook
HOW TO TRAIN
SUMMARY
SIX:
Ventilator-induced Lung Injury
INTRODUCTION
MECHANISMS OF LUNG INJURY
Overdistention
Shear Injury
Cyclical Collapse (also called Repeated Airway Collapse and Expansion—RACE)
Biotrauma
MICROSCOPIC AND MOLECULAR EFFECTS
Lung Skeleton
Cells
Cytokines
Apoptosis
VENTILATORY STRATEGIES TO PREVENT VILI
Lung Protective Ventilation with or without Extracorporeal CO2 Removal
PEEP
Prone Ventilation
Continuous Lateral Rotation Therapy (CLRT)
Upright Position Mechanical Ventilation
Negative-pressure Ventilation
Airway Pressure Release Ventilation (APRV)
High Frequency Oscillation (HFO)
Neurally-adjusted Ventilatory Assist (NAVA)
CONCLUSION
SEVEN:
Extubation in Intensive Care
INTRODUCTION
CAUSE OF EXTUBATION FAILURE
PRE-EXTUBATION ASSESSMENT
Assessment of Respiratory Function
Assessment of Cardiovascular Function
Assessment of Sedation and Analgesia
Assessment of Cough and Secretions
Assessment of Airway
Assessment—General
EXTUBATION OF PATIENTS
Patients with Reduced Level of Consciousness
Patients with Known or Suspected Difficult Airway
Patients with Pre-existing Lung Disease
Patients with Obesity
POST-EXTUBATION CARE
SPECIAL SITUATIONS
Unplanned Extubation in ICU
Extubation in Theaters
Extubation at End of Life
Tracheostomy
SUMMARY
EIGHT:
Steroids in the Management of Acute Respiratory Distress Syndrome
INTRODUCTION
PATHOPHYSIOLOGY OF ARDS
BASIS OF CORTICOSTEROID THERAPY FOR ARDS
SEARCH STRATEGY AND IDENTIFICATION OF TRIALS
STEROID THERAPY FOR ARDS/ALI
Prophylactic Steroid Therapy
Therapeutic Steroid Therapy
CONCLUSION
SECTION C: ICU PHYSIOLOGY AND PHARMACOLOGY
NINE:
Physiology, Benefit and Risk of RBC Transfusion in the ICU
INTRODUCTION
PHYSIOLOGY OF TISSUE OXYGEN DELIVERY
Bulk Oxygen Transport
Oxygen Delivery in the Microcirculation
Functional Capillary Density
Microcirculatory Flow
Capillary Hematocrit
Role of RBC as Microcirculatory Regulator
Oxygen Uptake and Extraction Ratio
Concept of Critical Hemoglobin and Critical DO2
OXYGEN DELIVERY IN THE CRITICALLY ILL
Does Supplying Abundant Oxygen at Tissue Level Improve Outcome?
Does Transfusion Increase Oxygen Delivery/Consumption?
Why RBC Transfusion does not Always Increase Oxygen Delivery/ Consumption?
Drop in 2, 3 DPG Levels
Reduced SNO Hb
Impaired Deformability
Increased RBC Adhesion to Vascular Endothelium
Free Hb
Is Low Hemoglobin a Risk for Coronary Artery Disease Patients?
BENEFITS OF RBC TRANSFUSION
RISKS OF RBC TRANSFUSION
Infectious Risks
Noninfectious Risks
TRALI
Transfusion Associated Circulatory Overload (TACO)
Graft versus Host Disease (GVHD)
Immunosuppression
Cost of Transfusion
CONCLUSION
TEN:
Physiology of Hyperbaric Oxygen Therapy
INTRODUCTION
HISTORY
MECHANISMS OF ACTION
Gas Laws and HBOT
Boyle's Law
Henry's Law
Exceptional Blood Loss Anemia
Physiological and Biochemical Effects of HBOT
Hyperoxia
CLINICAL APPLICATIONS
Necrotizing Infections
Carbon Monoxide Poisoning
Ischemic and Ischemic Reperfusion Injuries
Intracranial Infections and Pathology
Thermal Burns
PATHOPHYSIOLOGY OF HBOT
Barotrauma
Oxygen Toxicity
Other Complications
CONCLUSION
ELEVEN:
Pharmacology of Prostanoids Use in the ICU
INTRODUCTION
BIOLOGY OF PROSTANOIDS
Biosynthesis
Prostanoid Receptors
Catabolism
PHYSIOLOGY OF PROSTANOIDS
Cardiovascular System
Hematological System
Renal System
Gastrointestinal System
Inflammation, Pain, Fever
THERAPEUTIC USE OF PROSTANOIDS IN ICU
Use in Pulmonary Hypertension
Use in Extracorporeal Circuits
Other Pharmacological Considerations
CONCLUSION
TWELVE:
Antibiotic Dosing in Critically Ill Patients
INTRODUCTION
BASIC CLINICAL PHARMACOKINETICS AND PHARMACODYNAMICS
ALTERED PHARMACOKINETICS IN SEPSIS
Altered Capillary Permeability and Fluid Resuscitation
Hypoalbuminemia
Augmented Renal Clearance
Multi-organ Dysfunction Syndrome (MODS)
Renal Replacement Therapy (RRT)
ANTIBIOTICS IN THE INTENSIVE CARE UNIT
Antibiotic Physicochemical Properties
PHASES OF THERAPY: INITIAL VS MAINTENANCE DOSING
STRATEGIES FOR OPTIMIZING ANTIBIOTIC INITIAL DOSING
Optimizing Loading Doses for Lipophilic Antibiotics
Optimizing Loading Doses for Hydrophilic Antibiotics
Measurement of Vd of Hydrophilic Drugs
STRATEGIES FOR OPTIMIZING ANTIBIOTIC MAINTENANCE DOSING
Decreased CL
Increased CL
Measurement of CL of Hydrophilic Drugs
CONCLUSION
SECTION D: SEPSIS AND INFECTION CONTROL
THIRTEEN:
Inflammatory and Immune Responses in Sepsis
INTRODUCTION
INNATE IMMUNITY AND TOLL-LIKE RECEPTORS
GRAM-NEGATIVE SEPSIS: ACTIVATION OF TLR4 AND ITS CONSEQUENCES
Lipopolysaccharide: The Primary Trigger
Activation of TLR4 and Signalling Cascades
Proinflammatory Cytokine Production
Effects on Complement and Neutrophils
Dysregulation of Coagulation and Endothelial Function
Immunoparalysis
GRAM-POSITIVE SEPSIS: ACTIVATION OF TLR2
PROINFLAMMATORY EFFECTS OF THE LIGATION OF OTHER TOLL-LIKE RECEPTORS
IMPLICATIONS FOR THE MANAGEMENT OF SEPSIS
FOURTEEN:
Epidemiology and Implications of ESBL among Gram-negatives in India
INTRODUCTION
WHAT ARE ESBL PRODUCING BACTERIA
Definition of ESBL
Classification of Beta-lactamases11
Clinical Impact of ESBL Producing Organism
PREVALENCE OF ESBL
Global Trends
Prevalence of ESBL Gram-negatives in India
Molecular Epidemiology of ESBL Genotypes in Asia
ESBL DETECTION METHODS
Phenotypic Methods
Molecular Methods
Automated Methods
CLINICAL IMPLICATIONS
Treatment Options for Infection with ESBL Producing Organisms
Recommendations for Indian Hospitals
CONCLUSION
FIFTEEN:
Adjuvant Therapies in Sepsis
INTRODUCTION
DROTRECOGIN ALPHA (rhAPC)
POOLED IMMUNOGLOBULIN (IVIG)
CORTICOSTEROIDS
HMG CoA REDUCTASE INHIBITORS
MACROLIDE ANTIBIOTICS
ANTICYTOKINE THERAPIES
Anti-TNF Agents
Other Anti-cytokine Therapies
MISCELLANEOUS THERAPIES
High Flow Hemofiltration
Glycemic Control
Colony Stimulating Factors (CSF)
CONCLUSION
SIXTEEN:
Clostridium Difficile Diarrhea in ICU Patients
INTRODUCTION
EPIDEMIOLOGY
RISK FACTORS
ANTIMICROBIAL USE
PATHOGENESIS
CLINICAL FEATURES
Category I: Asymptomatic Carriage
Category II: Mild to Moderate Diarrhea
Category III: C Diff Colitis without Pseudomembranes
Category IV: Pseudomembranous Colitis (PMC)
Category V: Acute Abdomen with Sepsis
Category VI: Recurrent CDAD
DIAGNOSIS
MANAGEMENT
General Principles
Metronidazole vs Vancomycin
Other Antibiotics
Adjunctive Therapies
Probiotics
Fecal Bacteriotherapy
Surgical Management
Recurrent Infections
CONCLUSION
SECTION E: MONITORING AND DIAGNOSTICS
SEVENTEEN:
Assessing Fluid Responsiveness in the Hypotensive Patients
INTRODUCTION
SIMPLE CLINICAL TECHNIQUES
Indirect Clinical Assessment of Fluid Status
Intravascular Fluid Challenge
Passive Leg Raising
STATIC OR PRELOAD PARAMETERS
Central Venous Pressure (CVP) or Right Atrial Pressure (RAP)
Pulmonary Artery Occlusion Pressure (PAOP)
Right Ventricular End-diastolic Volume Index (RVEDVI)
Left Ventricular End-diastolic Area (LVEDA) and Index (LVEDAI)
Global End-diastolic Volume (GEDV) and Intrathoracic Blood Volume (ITBV)
DYNAMIC PRELOAD RESPONSIVENESS PARAMETERS
Determinants of Change in the LV Stroke Volume during the Respiratory Cycle
Inspiratory Change in the CVP (RAP) and PAOP
Respiratory Variation in Vena Cava Diameter
Pulse Pressure Variation (PPV) and Systolic Pressure Variation (SPV)
Stroke Volume Variation (SVV)
Plethysmographic Wave Variation (Plet WV)
Pre-ejection Period Variation (DPEP)
Peak Aortic Blood Flow Velocity Variation (DAo Peak Vel)
Aortic Velocity Time Integral Variation (∆Ao VTI)
CONCLUSION
EIGHTEEN:
Risk Assessment and Prevention of Pressure Ulcers in the ICU
INTRODUCTION
EPIDEMIOLOGY OF PRESSURE ULCERS
RISK FACTORS
FINDING OUT WHO IS AT RISK
Risk Assessment Scales
Risk Assessment in ICU Patients
PREVENTION
Risk Mitigation for those at Risk
Risk Minimization for those with Pressure Ulcers
CONCLUSION
NINETEEN:
Monitoring of Neuromuscular Blockade in the ICU
INTRODUCTION
METHODS OF MONITORING
Clinical Indicators
Nerve Stimulation
Single Twitch
Train-of-four (TOF) Stimulation
Tetanus
Post-tetanic Count
Double Burst Stimulation
EVIDENCE FOR MONITORING NEUROMUSCULAR BLOCKADE
CONCLUSION
TWENTY:
Point-of-Care Testing of Coagulation in a Bleeding Patient
INTRODUCTION
POINT-OF-CARE TESTING
POC Coagulation Tests
Platelet Function Analyzers
Viscoelastic Coagulation Monitoring
APPLICATIONS OF POINT-OF-CARE TESTING
Cardiac Surgery
Liver Surgery
Monitoring Anti-coagulation
PRACTICAL ISSUES
Quality Assurance in POC
Training of Personnel and Proficiency Testing
CONCLUSION
INDEX
TOC
Index
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