General considerations Pregnancy Effects by System (Box 41.3) Summary References CHAPTER 42: Emergencies of pregnancy Introduction Evaluation and transport of the pregnant patient Miscarriage Ectopic pregnancy Placental abruption Placenta previa Hypertension during pregnancy Preeclampsia Eclampsia Conclusion Acknowledgment References CHAPTER 43: Normal childbirth Introduction Pregnancy Evaluation of the pregnant patient Labor and delivery Postdelivery: care of the neonate Challenges of prehospital deliveries Special considerations References CHAPTER 44: Childbirth emergencies General considerations and resource management Management of abnormal presentations Conclusion References CHAPTER 45: Perimortem cesarean section Background Potential benefits of perimortem C‐section Performance of perimortem C‐section in the field Indications for perimortem C‐section Education Procedure Ethical and legal considerations Conclusion References SECTION III: Toxicological Problems CHAPTER 46: Principles of toxicology Introduction Evaluation Toxidromes Treatment Special considerations Protocols Summary Acknowledgments References CHAPTER 47: Treatment and evaluation of specific toxins Introduction Specific agents Summary References SECTION VIII: Environmental Problems CHAPTER 48: Cold exposure illness and injury Introduction Accidental hypothermia Nonfreezing cold injuries of the foot Frostbite/Freezing Cold Injury Cold‐water immersion Conclusion References Additional References CHAPTER 49: Heat‐related illness Introduction Physiology of thermoregulation Pathophysiology Heat edema Heat syncope Heat tetany Heat cramps Heat exhaustion Heat stroke Cooling techniques Summary References CHAPTER 50: High‐altitude illnesses Introduction Physiology
