Carden Johnston

Bio: Carden Johnston is an academic researcher from University of Alabama at Birmingham. The author has contributed to research in topics: Poison control & Respiratory therapist. The author has an hindex of 12, co-authored 16 publications receiving 641 citations. Previous affiliations of Carden Johnston include Columbia University.

Children in Car Crashes: Analysis of Data for Injury and Use of Restraints

Abstract: Objective. To determine the effect of car restraints on motor vehicle injury rates for children aged 0 to 14 years. Methods. A probability sample of all police-reported car crashes in the United States in 1990 and 1991 was analyzed for injury rates of passengers aged less than 15 years in relation to restraint usage, age, and seating position. Results. Optimal restraint usage (defined as car seats for children 0 to 4 years old and lap shoulder belts for children 5 to 14 years old) was 40%. The use of the car seat was 76% for infants (0 to 12 months old) and 41% for toddlers (1 to 4 year olds). The non use of a restraint was highest for 10 to 14 year olds (43%). The rate of involvement in car crashes for all children was 21.4 (per 1000/yr). The highest rate was the 14 year olds with 29.6 followed by 2 year olds with 26.5. Injury rates were 4.76 (per 1000/yr) for all children. The lowest rate was 2.91 for infants but increased to 4.78 for 3 year olds. The single strongest risk factor for injury was the non use of a restraint. (Adjusted odds ratio 2.7; 95% CI 2.4 to 3.0.) The risk factor for injury for the front seat was 1.5 (95% CI 1.4 to 1.7). Use of the car seat reduced injuries by 60% for 0 to 4 year olds, whereas the lap shoulder harness was only 38% effective for 5 to 14 year olds (P ≤ .001) Injury rates of unrestrained 0 to 4 and 5 to 14 year olds were similar. Conclusions. Greater involvement in car crashes and less use of car restraints explains the 64% higher rate of injury for 3 year olds than for infants. It is time to target the toddlers. Restraints designed for adults are not as effective for the school age child as car seats are for the preschool child. A better restraint for the school age child should be designed and evaluated. Meanwhile, increased usage of current restraints must be encouraged, as they substantially reduce injuries.

The pediatrician and disaster preparedness

Abstract: For decades, emergency planning for natural disasters, public health emergencies, workplace accidents, and other calamities has been the responsibility of government agencies on all levels and certain nongovernment organizations such as the American Red Cross. In the case of terrorism, however, entirely new approaches to emergency planning are under development for a variety of reasons. Terrorism preparedness is a highly specific component of general emergency preparedness. In addition to the unique pediatric issues involved in general emergency preparedness, terrorism preparedness must consider several additional issues, including the unique vulnerabilities of children to various agents as well as the limited availability of age- and weight-appropriate antidotes and treatments. Although children may respond more rapidly to therapeutic intervention, they are at the same time more susceptible to various agents and conditions and more likely to deteriorate if they are not monitored carefully. This article is designed to provide an overview of key issues for the pediatrician with respect to disaster, terrorism, and public health emergency preparedness. It is not intended to be a complete compendium of didactic content but rather offers an approach to what pediatricians need to know and how pediatricians must lend their expertise to enhance preparedness in every community. To become fully and optimally prepared, pediatricians need to become familiar with these key areas of emergency preparedness: unique aspects of children related to terrorism and other disasters; terrorism preparedness; mental health vulnerabilities and development of resiliency; managing family concerns about terrorism and disaster preparedness; office-based preparedness; hospital preparedness; community, government, and public health preparedness; and advocating for children and families in preparedness planning.

Toppled television sets cause significant pediatric morbidity and mortality

Abstract: Objective. To quantify pediatric injuries and deaths that result from toppled television sets. Design. Retrospective analysis of incident files compiled by the US Consumer Product Safety Commission (CPSC) data systems and The Children9s Hospital of Alabama (TCHA) inpatient medical records. Setting. United States, January 1990–June 1997. TCHA, May 1995–October 1997. Main Outcome Measures. Morbidity or mortality as a result of a television set falling onto a child. Results. Over the 7-year period from January 1990 to June 1997, 73 cases that involved falling television sets were reported to the CPSC, including 28 deaths. The mean age of all victims was 36 months (SD ± 25.4 months). The mean age of those who died was 31 months (SD ± 22 months). Females accounted for 42 incidents (58%) and 19 deaths (68%). The most common anatomic site of injury was the head, which accounted for 72% of cases investigated by CPSC personnel. Of the 14 deaths further investigated by the CPSC, head injury was responsible for 13, with a generalized crushing injury accounting for the other. Of the 45 cases in which data were available, dressers or stands were identified as the television support 76% of the time. The TCHA database yielded five additional cases, including one death, with demographics similar to the CPSC data. Conclusion. Serious injury and death can occur as a result of children toppling television sets from elevated locations in the home. The furniture on which a television set is situated is of fundamental importance. An estimate of overall risk to the population is impossible to determine from these data. In light of 73 reported cases with 28 deaths; however, injury prevention counseling and other strategies supporting in-home safety should include a secure and child-safe location for television sets. Attention should be paid to safer design and placement of this ubiquitous product. television, wounds and injuries, accidents, human, infants, children.

Pediatric prehospital care in a southern regional emergency medical service system.

Abstract: A retrospective review of 2,302 ambulance run reports from the Birmingham Regional Emergency Medical Service System indicated that 6% of all runs are for patients in the pediatric age group (less than 18 years of age). Injuries related to emergencies were responsible for more than 65% of pediatric runs, and 30% were related to motor vehicle accidents. Surprisingly, 8% of calls were for seizure disorders, a figure much higher than in the adult population. Approximately 38% of the runs involved children between the ages of 6 and 12 years. Significantly more male than female patients were involved. This descriptive epidemiologic study is antecedent to effective planning and implementation of pediatric prehospital care programs. Training of emergency personnel should be targeted toward treating motor vehicle injuries, seizures, poisoning, and upper airway obstruction in children.

Part 9: Post-Cardiac Arrest Care: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care

Abstract: There is increasing recognition that systematic post–cardiac arrest care after return of spontaneous circulation (ROSC) can improve the likelihood of patient survival with good quality of life. This is based in part on the publication of results of randomized controlled clinical trials as well as a description of the post–cardiac arrest syndrome. 1–3 Post–cardiac arrest care has significant potential to reduce early mortality caused by hemodynamic instability and later morbidity and mortality from multiorgan failure and brain injury. 3,4 This section summarizes our evolving understanding of the hemodynamic, neurological, and metabolic abnormalities encountered in patients who are initially resuscitated from cardiac arrest. The initial objectives of post–cardiac arrest care are to ● Optimize cardiopulmonary function and vital organ perfusion. ● After out-of-hospital cardiac arrest, transport patient to an appropriate hospital with a comprehensive post–cardiac arrest treatment system of care that includes acute coronary interventions, neurological care, goal-directed critical care, and hypothermia. ● Transport the in-hospital post–cardiac arrest patient to an appropriate critical-care unit capable of providing comprehensive post–cardiac arrest care. ● Try to identify and treat the precipitating causes of the arrest and prevent recurrent arrest.

Part 8: Adult Advanced Cardiovascular Life Support 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care

Abstract: The goal of therapy for bradycardia or tachycardia is to rapidly identify and treat patients who are hemodynamically unstable or symptomatic due to the arrhythmia. Drugs or, when appropriate, pacing may be used to control unstable or symptomatic bradycardia. Cardioversion or drugs or both may be used to control unstable or symptomatic tachycardia. ACLS providers should closely monitor stable patients pending expert consultation and should be prepared to aggressively treat those with evidence of decompensation.

Part 14: Pediatric Advanced Life Support 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care

Abstract: In contrast to adults, cardiac arrest in infants and children does not usually result from a primary cardiac cause. More often it is the terminal result of progressive respiratory failure or shock, also called an asphyxial arrest. Asphyxia begins with a variable period of systemic hypoxemia, hypercapnea, and acidosis, progresses to bradycardia and hypotension, and culminates with cardiac arrest.1 Another mechanism of cardiac arrest, ventricular fibrillation (VF) or pulseless ventricular tachycardia (VT), is the initial cardiac rhythm in approximately 5% to 15% of pediatric in-hospital and out-of-hospital cardiac arrests;2,–,9 it is reported in up to 27% of pediatric in-hospital arrests at some point during the resuscitation.6 The incidence of VF/pulseless VT cardiac arrest rises with age.2,4 Increasing evidence suggests that sudden unexpected death in young people can be associated with genetic abnormalities in myocyte ion channels resulting in abnormalities in ion flow (see “Sudden Unexplained Deaths,” below). Since 2010 marks the 50th anniversary of the introduction of cardiopulmonary resuscitation (CPR),10 it seems appropriate to review the progressive improvement in outcome of pediatric resuscitation from cardiac arrest. Survival from in-hospital cardiac arrest in infants and children in the 1980s was around 9%.11,12 Approximately 20 years later, that figure had increased to 17%,13,14 and by 2006, to 27%.15,–,17 In contrast to those favorable results from in-hospital cardiac arrest, overall survival to discharge from out-of-hospital cardiac arrest in infants and children has not changed substantially in 20 years and remains at about 6% (3% for infants and 9% for children and adolescents).7,9 It is unclear why the improvement in outcome from in-hospital cardiac arrest has occurred, although earlier recognition and management of at-risk patients on general inpatient units …

The injury fact book

Abstract: This book includes detailed information on many of the factors surrounding injuries--the man-made systems and products involved, the groups at greatest risk, and effective ways to protect people from injuries. The circumstances under which injuries occur, the etiologic agents, and the characteristics of the people involved are examined. Chapter 2 summarizes the importance of injuries in relation to other prominent health problems. Subsequent chapters describe injury mortality and, in cases where good population-based studies are available, nonfatal injuries. The analyses in Chapters 3-15 are primarily of injury deaths during 1977-1979, the most recent years for which detailed mortality data were available in mid-1983 for deaths other than those related to motor vehicles. Most of these data were collected by the U.S. Department of Health and Human Services, National Center for Health Statistics (NCHS). Chapters 16-20 summarize data on deaths from motor vehicle-related injuries. Most of these detailed data were obtained from the U.S. Department of Transportation, National Highway Traffic Safety Administration (NHTSA). Data from the 1980 census provided denominators for the rates throughout the book, except for trendline calculations which were based on interpolations between census years. The purpose of this book is to improve understanding of the nature and magnitude of the injury problem in the United States. Although it includes some discussion of ameliorative approaches, there is no comprehensive coverage of injury research, theory, or prevention, since these have been comprehensively discussed elsewhere. This book is a thorough documentation of the injury problem. Most of the information presented is new, the product of analyses not previously published in any form.

The Principles of Readability.

Abstract: The Principles of Readability gives a brief introduction to the literacy studies in the U.S. and the research on readability and the readability formulas.