Dealing With the Caretaker Whose Judgment Is Impaired by Alcohol or Drugs: Legal and Ethical Considerations

An estimated 8.7 million children live in a household with a substance-using parent or guardian. Substance-using caretakers may have impaired judgment that can negatively affect their child's well-being, including his or her ability to receive appropriate medical care. Although the physician-patient relationship exists between the pediatrician and the child, obligations related to safety and confidentiality should be considered as well. In managing encounters with impaired caretakers who may become disruptive or dangerous, pediatricians should be aware of their responsibilities before acting. In addition to fulfilling the duty involved with an established physician-patient relationship, the pediatrician should take reasonable care to safeguard patient confidentiality; protect the safety of their patient, other patients in the facility, visitors, and employees; and comply with reporting mandates. This clinical report identifies and discusses the legal and ethical concepts related to these circumstances. The report offers implementation suggestions when establishing anticipatory procedures and training programs for staff in such situations to maximize the patient's well-being and safety and minimize the liability of the pediatrician.

Electronic Communication of the Health Record and Information With Pediatric Patients and Their Guardians

Communication of health data has evolved rapidly with the widespread adoption of electronic health records (EHRs) and communication technology. What used to be sent to patients via paper mail, fax, or e-mail may now be accessed by patients via their EHRs, and patients may also communicate securely with their medical team via certified technology. Although EHR technologies have great potential, their most effective applications and uses for communication between pediatric and adolescent patients, guardians, and medical teams has not been realized. There are wide variations in available technologies, guiding policies, and practices; some physicians and patients are successful in using certified tools but others are forced to limit their patients' access to e-health data and associated communication altogether. In general, pediatric and adolescent patients are less likely than adult patients to have electronic access and the ability to exchange health data. There are several reasons for these limitations, including inconsistent standards and recommendations regarding the recommended age for independent access, lack of routine EHR support for the ability to filter or proxy such access, and conflicting laws about patients' and physicians' rights to access EHRs and ability to communicate electronically. Effective, safe electronic exchange of health data requires active collaboration between physicians, patients, policy makers, and health information technology vendors. This policy statement addresses current best practices for these stakeholders and delineates the continued gaps and how to address them.

Understanding Liability Risks and Protections for Pediatric Providers During Disasters

Although most health care providers will go through their careers without experiencing a major disaster in their local communities, if one does occur, it can be life and career altering. The American Academy of Pediatrics has been at the forefront of providing education and advocacy on the critical importance of disaster preparedness. From experiences over the past decade, new evidence and analysis have broadened our understanding that the concept of preparedness is also applicable to addressing the unique professional liability risks that can occur when caring for patients and families during a disaster. In our recommendations in this policy statement, we target pediatric health care providers, advocates, and policy makers and address how individuals, institutions, and government can work together to strengthen the system of liability protections during disasters so that appropriate and timely care can be delivered with minimal fear of legal reprisal or confusion.

Understanding Liability Risks and Protections for Pediatric Providers During Disasters

Although most health care providers will go through their careers without experiencing a major disaster in their local communities, if one does occur, it can be life and career altering. The American Academy of Pediatrics has been in the forefront of providing education and advocacy on the critical importance of disaster preparedness. From experiences over the past decade, new evidence and analysis have broadened our understanding that the concept of preparedness is also applicable to addressing the unique professional liability risks that can occur when caring for patients and families during a disaster. Concepts explored in this technical report will help to inform pediatric health care providers, advocates, and policy makers about the complexities of how providers are currently protected, with a focus on areas of unappreciated liability. The timeliness of this technical report is emphasized by the fact that during the time of its development (ie, late summer and early fall of 2017), the United States went through an extraordinary period of multiple, successive, and overlapping disasters within a concentrated period of time of both natural and man-made causes. In a companion policy statement (www.pediatrics.org/cgi/doi/10.1542/peds.2018-3892), recommendations are offered on how individuals, institutions, and governments can work together to strengthen the system of liability protections during disasters so that appropriate and timely care can be delivered with minimal fear of legal reprisal or confusion.

A recession's impact on pediatric emergency household spending and attitudes about health-care reform

BACKGROUND

We assessed changes in household spending and opinions about health-care insurance reform among parents in the pediatric emergency department (PED) during the current recession.

METHODS

We conducted a survey of parents at a PED. Enrollment was in June and July 2009. We assessed demographics, employment and insurance status, and difficulty paying for household expenses. Open-ended questions addressed attitudes about health-care reform.

RESULTS

Among 467 parents, job loss was associated with difficulty paying for food (OR 2.32, 95% CI 1.53-3.52), housing (3.21, 2.11-4.88), and utilities (2.19, 1.44-3.32). In total, 226 respondents cut household expenses. More respondents cut food expenses (20.8%) and utilities (15.8%) than child health care (12.0%). Of 154 respondents providing opinions about health-care reform, 66.9% endorsed reform, and 9.7% disagreed.

CONCLUSION

Parents with job loss reported hardship paying for household expenses. One in eight families have cut child health-care expenses. A population of PED parents commonly favored health-care insurance reform.

Use of bedside ultrasound to assess degree of dehydration in children with gastroenteritis

OBJECTIVES

Prospectively identifying children with significant dehydration from gastroenteritis is difficult in acute care settings. Previous work by our group has shown that bedside ultrasound (US) measurement of the inferior vena cava (IVC) and the aorta (Ao) diameter ratio is correlated with intravascular volume. This study was designed to validate the use of this method in the prospective identification of children with dehydration by investigating whether the IVC/Ao ratio correlated with dehydration in children with acute gastroenteritis. Another objective was to investigate the interrater reliability of the IVC/Ao measurements.

METHODS

A prospective observational study was carried out in a pediatric emergency department (PED) between November 2007 and June 2009. Children with acute gastroenteritis were enrolled as subjects. A pair of investigators obtained transverse images of the IVC and Ao using bedside US. The ratio of IVC and Ao diameters (IVC/Ao) was calculated. Subjects were asked to return after resolution of symptoms. The difference between the convalescent weight and ill weight was used to calculate the degree of dehydration. Greater than or equal to 5% difference was judged to be significant. Linear regression was performed with dehydration as the dependent variable and the IVC/Ao as the independent variable. Pearson's correlation coefficient was calculated to assess the degree of agreement between observers.

RESULTS

A total of 112 subjects were enrolled. Seventy-one subjects (63%) completed follow-up. Twenty-eight subjects (39%) had significant dehydration. The linear regression model resulted in an R² value of 0.21 (p < 0.001) and a slope (B) of 0.11 (95% confidence interval [CI] = 0.08 to 0.14). An IVC/Ao cutoff of 0.8 produced a sensitivity of 86% and a specificity of 56% for the diagnosis of significant dehydration. Forty-eight paired measurements of IVC/Ao ratios were made. The Pearson correlation coefficient was 0.76.

CONCLUSIONS

  In this pilot study the ratio of IVC to Ao diameters, as measured by bedside US, was a marginally accurate measurement of acute weight loss in children with dehydration from gastroenteritis. The technique demonstrated good interrater reliability.

Use of Ultrasound Measurement of the Inferior Vena Cava Diameter as an Objective Tool in the Assessment of Children with Clinical Dehydration

OBJECTIVES

Bedside ultrasonography (US) measurement of the inferior vena cava (IVC) and aorta (Ao) may be useful in objectively assessing children with dehydration. The objectives of this study were 1) to compare the IVC and Ao diameters (IVC/Ao) ratio of dehydrated children with controls and 2) to compare the IVC/Ao ratio before and after intravenous (i.v.) rehydration in children with dehydration.

METHODS

This prospective observational study was performed in an urban pediatric emergency department. Children between 6 months and 16 years of age with clinical evidence of dehydration were enrolled. Bedside US measurements of the IVC and Ao were taken before and immediately after i.v. fluids were administered. An age-, gender-, and weight-matched control without dehydration was enrolled for each subject. The IVC/Ao ratios of subjects and controls were compared using Wilcoxon signed rank test, as were the ratios before and after i.v. hydration for each subject.

RESULTS

Thirty-six pairs of subjects and matched controls were enrolled. The IVC/Ao ratios in the subjects were lower as compared with controls (mean of 0.75 vs. 1.01), with a mean difference of 0.26 (95% confidence interval = 0.18 to 0.35). In subjects, the IVC/Ao ratios were significantly lower before i.v. hydration (mean of 0.75 vs. 1.09), with a mean difference of 0.34 (95% confidence interval = 0.29 to 0.39).

CONCLUSIONS

As measured by bedside US measurement, the IVC/Ao ratio is lower in children clinically assessed to be dehydrated. Furthermore, it increases with administration of i.v. fluid boluses.

A randomized trial to assess the efficacy of point-of-care testing in decreasing length of stay in a pediatric emergency department

OBJECTIVES

To compare the effect of point-of-care (POC) testing versus traditional laboratory methods on length of stay in a pediatric emergency department (ED).

METHODS

This study was a prospective, randomized, controlled trial of patients solely requiring blood work that a POC device was capable of performing. Two hundred twenty-five patients presenting to a tertiary hospital ED in an urban setting enrolled after informed consent. Of all patients studied, 114 were randomized to the POC group, 111 to routine laboratory analysis. Exact times of critical phases of management and patient flow were recorded by dedicated research assistants. Medical management decisions were made at the discretion of the supervising physicians.

RESULTS

Similar waiting periods were noted in both groups for time spent in the waiting room, time waiting for first physician contact, and time waiting for blood draw. Significantly less time was required for results to become available to physicians when POC testing was used (65.0 minutes; P < 0.001). Significant decrease in overall length of stay was also noted, with patients randomized to the POC group spending an average of 38.5 minutes (P < 0.001) less time in the ED.

CONCLUSIONS

Point-of-care testing can significantly decrease the length of stay in select pediatric patients in an ED setting. Point-of-care devices may prove to facilitate patient flow during busiest periods of service demand.

Transitional medicine: will emergency medicine physicians be ready for the growing population of adults with congenital heart disease?

BACKGROUND

Currently, approximately 85% of children with significant congenital heart problems survive to adolescence and adulthood. This survival rate represents a dramatic improvement in the medical and surgical care of congenital heart disease (CHD) during the last 35 years. Nevertheless, these patients remain at increased risk for significant cardiac problems long after primary interventions are completed. They are more likely than the general population to seek urgent medical care, often in an emergency department setting. They represent a new and growing population of emergency department patients with a specialized set of problems not traditionally part of the training for emergency medicine (EM) physicians.

OBJECTIVE

We investigated the current scope and status of training for EM physicians in the immediate management of CHD patients as they grow to adolescence and adulthood.

METHODS

We conducted 2 cross-sectional surveys to assess the current training environment for 2 specific groups: (1) US general EM (GEM) residency programs, and (2) US and Canadian pediatric EM (PEM) fellowship programs. Surveys were mailed to program directors during the summer of 2005. A total of 198 surveys were sent out: 134 to GEM residency directors and 64 to PEM fellowship directors.

RESULTS

The response rate overall was 68%, with a 64% response rate from the GEM residency directors and 77% from the PEM fellowship directors. Across all programs, 43% (56/130 respondents) were "unsure" about the existence or location of an adult CHD (ACHD) clinic in their area. When asked to rate the importance of ACHD as a training topic, 40 (85%) of 47 PEM fellowship directors and 62 (74%) of 84 GEM residency directors ranked it as "low priority" or "unnecessary." However, 70 (55%) of 127 respondents were "unsure," "uncomfortable," or "worried" about the ACHD training their trainees receive (PEM, 59%; GEM, 53%). In addition, most program directors (75%) estimated that their trainees care for 5 or fewer ACHD patients annually.

CONCLUSIONS

There seems to be a mismatch between the growing need for ACHD emergency care and the current state of this topic in both GEM residency and PEM fellowship training programs.

Pediatric fatality following ingestion of dinitrophenol: postmortem identification of a "dietary supplement"

Dinitrophenol, a chemical currently used as an insecticide, is known to uncouple mitochondrial oxidative phosphorylation. A component of explosives, it has also been used in the past as a food coloring and clothing dye. In the 1930s, physicians prescribed it for weight loss, but this practice was discontinued when reports of cataracts, deaths, and other adverse outcomes came to light. We describe in our report the overdose and fatality of a teenager who purchased the product as a weight loss dietary supplement by mail order. We also describe a laboratory method that allowed postmortem determination of the dinitrophenol concentration in the victim's serum. Her death, despite prompt medical treatment, underscores the danger of dinitrophenol. The easy accessibility and apparent resurgent interest in dinitrophenol as a weight loss agent is extremely timely and troubling.

Utility of bedside bladder ultrasound before urethral catheterization in young children

BACKGROUND

Urethral catheterization is the method of choice for obtaining samples for urine culture and urine analysis in infants. Before the procedure, there is little certainty of the presence or amount of urine in the bladder. Consequently, this relatively invasive and uncomfortable procedure often needs to be repeated. The newly available technology of portable ultrasound may be useful in reducing the number of unsuccessful procedures.

OBJECTIVE

To investigate the utility of bedside ultrasound of the bladder performed by pediatric emergency medicine physicians before catheterization in reducing the number of unsuccessful attempts.

METHODS

A prospective, 2-phase study was performed in the setting of an urban pediatric emergency department from August 2003 to February 2004. Children who were between the ages of 0 and 24 months were enrolled. During the observation phase, the amount of urine obtained during the first catheterization was recorded for each patient. During the intervention period, a rapid bedside ultrasound of the bladder was performed by a pediatric emergency medicine physician immediately before urethral catheterization. When a sufficient amount of urine was seen, catheterization was conducted as usual. Otherwise, catheterization was deferred and repeated ultrasound was performed at 30-minute intervals until sufficient urine was identified. The amount of urine obtained was recorded.

RESULTS

During the observation phase, 136 infants underwent urethral catheterization. Overall, the rate of success during the first attempt, defined as obtaining >2 mL of urine, sufficient for culture and other routine studies, was 72% (95% confidence interval: 66%-78%). A total of 112 subjects were enrolled during the intervention phase. Sufficient urine was identified on the first ultrasound in 76% (n = 85) of the patients. Among these, 98% (n = 83) underwent successful urethral catheterization during the first attempt. Among those in whom insufficient urine was identified initially (n = 27; 24%), subsequent ultrasound revealed sufficient amount in all patients within 90 minutes. Among these, 93% (n = 25) underwent successful urethral catheterization during the first attempt. Overall rate of success of initial urethral catheterization during the intervention phase was 96% (95% confidence interval: 93%-99%). Compared with the success rate during the observation phase, the differences were statistically significant. The results were consistent after being adjusted for gender.

CONCLUSION

A rapid bedside ultrasound of the bladder performed by pediatric emergency physicians led to an increased success rate of urethral catheterization in children who were younger than 2 years. We were able to avoid repeated invasive testing with a simple noninvasive procedure.

Advances in clinical forensic medicine

Clinical forensic medicine is the branch of medicine that deals specifically with cases involving both legal and medical aspects of patient care. A forensic evaluation refers to the detection, collection, and preservation of evidence. Pattern injury recognition, interpretation of injuries, documentation of testimonial and injuries (including photography), reporting requirements, and regulations are all vital components of a forensic evaluation, but are rarely the topic of discussion in training hospitals. Medical professionals working in prehospital care and acute care settings are likely to encounter perplexing forensic issues related to child abuse, sexual assault, or unexpected childhood death in their practice. This article focuses on the most recent insights related to sexual assault and forensic evidence as it relates to successful prosecution, shaken baby syndrome, and pediatric nonaccidental thermal injury. Also reviewed are the most current publications related to clinical forensic medicine for the year 2002, incorporating practical clinical tips from the most informative articles from the past decade.

Emergency medicine training programs' educational requirements in the management of psychiatric emergencies: current perspective

OBJECTIVE

The purpose of this study was to determine the extent of training in clinical psychiatry that is provided and/or required by emergency medicine (EM) residency training programs and pediatric emergency medicine (PEM) subspecialty residency training programs.

DESIGN/METHODS

A questionnaire was mailed to 114 EM residency directors and to all 50 PEM fellowship directors. Each director was asked to indicate the amount of psychiatric training that was required of residents or fellows in his or her program. Details concerning the exact structure of psychiatric training were solicited from those offering such training.

RESULTS

There was a 76% response rate (n = 88) among EM programs, and 76% (n = 59) of the respondents reported no formal training in the management of acute psychiatric emergencies. Only 14% (12 programs) provide a 1-month rotation in psychiatry. Of the 3-year programs, 14% (n = 11) offer 2-week psychiatric electives, and 9% (n = 8) offer some training. There was a 72% response rate among the PEM training programs. Only one of the 36 respondents provided a required 1-month rotation in psychiatry. Six programs stated the availability of a 1-month elective in psychiatry. Two programs reported 2 to 3 hours per year of core lecture time dedicated to psychiatric emergencies.

CONCLUSIONS

Standardized psychiatric training is not required of most trainees in EM and PEM. Few (24%) training programs provide formal psychiatric training for their EM residents, and even fewer (< 3%) provide such training for their PEM fellows.

An alternate light source to detect semen

The Wood's lamp (WL) has been used in sexual assault evaluations. Recent data have shown that semen does not fluoresce with a WL and that physicians are unable to differentiate semen from other common medicaments using a WL.

OBJECTIVES

To determine whether physicians could differentiate semen from other products using an alternate light source (ALS), and to investigate whether a brief training period with the ALS would enhance physicians' ability to differentiate between semen and other commonly used products.

METHODS

An ALS, Bluemaxx BM500, was found to cause semen to fluoresce. Physicians were first asked to use this ALS to identify semen and then to distinguish between a semen sample and other products. Physicians then received a training class on the use of the ALS and were then asked to differentiate semen from other products.

RESULTS

All physicians identified the semen as fluorescing and 25% successfully differentiated the semen from the other products using the ALS. Products most commonly mistaken for semen were a hand cream, Castille soap, and bacitracin. After the training session, 83% of the physicians successfully differentiated the semen from other products. The ALS, while not specific for semen identification, was 100% sensitive for it.

CONCLUSIONS

Physicians instructed in the use of an alternate light source (BM 500) are able to identify semen as fluorescing and can differentiate semen (after a training session) from other commonly used products.

Wood's lamp utility in the identification of semen

BACKGROUND

The accurate detection of semen is critical to forensic, medical, and legal personnel. The Wood's lamp (WL) emits ultraviolet light (UVL) and has been identified as useful in rape evaluations because it is purported to cause semen to fluoresce. This study was intended to determine if semen can be distinguished from other products by WL analysis.

METHODS

Investigators reviewed the previous training and frequency of use of the WL by emergency medicine and pediatric emergency medicine physicians at 2 medical centers. The participants were asked to use a WL to distinguish between a semen sample (<6 hours old) and 13 commonly used products. Next, 29 semen samples were collected and evaluated under high-power microscopy and under UVL.

RESULTS

A total of 41 physicians participated in the study (68% male). The number of years practicing in an emergency setting spanned from.3 to 25 years with a mean of 7. 1 years. A total of 51% of participants trained in emergency medicine, 23% in pediatrics and pediatric emergency medicine. A total of 22% reported formal training in the collection of forensic evidence. A total of 62% of the physicians believed they have identified semen in the past; one third felt they could differentiate semen from other products under UVL. None of the 41 physicians were able to differentiate semen from other products using a WL. Moreover, the semen samples used for the study did not fluoresce under WL analysis. None of the 29 semen samples fluoresced whether wet or dry. The medicaments most commonly mistaken for semen were A&D ointment (Cardinal Health, Inc, Dublin, OH), Surgilube (Division of Atlanta, Inc, Melville, NY), Barrier cream (Carrington Laboratories, Inc, Irving, TX), and bacitracin (Division of Atlanta, Inc, Melville, NY).

CONCLUSIONS

Participating physicians were unable to distinguish between semen and other common products, using the WL. Although the WL has been purported to be a useful tool as a screening device for the detection of seminal stains, the investigators have found it to be unreliable. Semen, previously reported to fluoresce under WL analysis, does not appear to do so. The correct identification of semen may be complicated by the presence of previously existing ointments and creams, some of which may be iatrogenically introduced (ie, Surgilube).

Acute isoniazid exposures and antidote availability

BACKGROUND

Over the past 10 years the reported incidence of acute isoniazid (INH)-related poisonings has increased, with 507 cases reported in 1996. Parenteral pyridoxine is the antidote for INH-induced seizures, but 5-g aliquot recommended to treat an ingestion of unknown quantity of INH is not always readily available to emergency physicians.

OBJECTIVE

To determine the hospital availability of pyridoxine.

METHODS

One hundred thirty questionnaires were distributed nationwide to the pharmacies and emergency departments (ED) of hospitals containing pediatric emergency medicine (PEM) fellowships and/or emergency medicine (EM) residencies. Questions were posed regarding the availability, quantity, location, and deemed importance of pyridoxine at each institution.

RESULTS

Responses were received from 81% of the hospitals with fellowships and 80% of the hospitals with residencies. Half of the former and one third of the latter reported not having the recommended 5-g aliquot available. Eighty percent of the hospitals with PEM programs and 71% with EM residencies with an adequate stock store it in the hospital's pharmacy, as opposed to in the ED. Thirty-four states were represented, 18 of which have experienced an increase in tuberculosis (TB) from 1993 to 1994; 6/18 (33%) of those did not have the pyridoxine available, and 7/18 (39%) did not deem it necessary.

CONCLUSIONS

Our results imply that between one third and one half of the respondents would be ill-equipped to treat acute INH neurotoxicity. Establishing regional distribution centers may alleviate this deficiency, specifically in urban areas with a high incidence or a positive percent increase in TB.

Intravenous catheter blood cultures: utility and contamination

OBJECTIVE

In pediatrics, blood cultures (BCs) are often drawn as intravenous (IV) catheters are placed. This routine minimizes the number of painful and often difficult punctures a child must undergo but results in the discarding of multiple BC bottles when these cultures are later determined to be unnecessary. If the contamination rate of BCs drawn through an indwelling IV did not exceed the contamination rate of BCs drawn at the time of IV placement, BCs could be drawn from the IV without subjecting the patient to another venipuncture. This study was done to compare the contamination rates of BCs drawn by these two methods. Additionally, we sought to determine if the collection of two BCs enhances pathogen recovery.

METHODS

Prospective comparison of contamination and bacteremia rates of BCs drawn by two different methods: the first BC was drawn at the time of IV line placement and the second BC was drawn from the previously placed IV at a later time. Setting. Urban pediatric emergency department with an annual census of 40 000.

PARTICIPANTS

One thousand five hundred sixty-four patients between the ages of 3 days and 22.1 years. The median age was 2.2 years. Sixty-four patients were excluded because we were unable to draw the second BC. Forty-six percent of eligible patients (n = 690) were girls.

RESULTS

Fifty-seven (1.9%) of 3000 grew contaminants: 27 in the first and 30 in the second BC for contamination rates of 1.8% and 2.0%. Thirty-eight (1.3%) of 3000 BCs grew pathogens: 24 represent 12 patients with growth in two out of two cultures and 14 represent 14 patients with growth in one out of two cultures. Pathogen rates were 1.1% (16/1500) with one BC per patient and 1.7% (22/1500) with two BCs per patient.

CONCLUSIONS

There is no difference in the contamination rates of two BCs drawn from the same site at two different times. The collection of two BCs per patient may enhance pathogen recovery.

Frozen oral hydration as an alternative to conventional enteral fluids

BACKGROUND

Oral hydration therapy is effective in dehydration, but is often bypassed or may fail.

OBJECTIVE

To compare the tolerance (amount accepted minus amount vomited) of a frozen solution (FS) (Revital-ICE, PTS Labs, Deerfield, Ill) with the conventional glucose electrolyte solution (CS).

DESIGN

Prospective, controlled crossover trial.

SETTING

Pediatric emergency department.

PARTICIPANTS

A convenience sample of 91 children with enteritis, 6 months to 13 years of age, with mild or moderate dehydration.

INTERVENTION

Children were offered either FS or CS. Each group was offered 10 mL/kg of either product during a 90-minute trial period, in 3 equal aliquots, and was monitored for the quantities consumed and vomited. Complete treatment failures (absolute refusal) were crossed over to the alternate product and intake was recorded.

MAIN OUTCOME MEASURES

Tolerance of the full 10 mL/kg of the original product offered and, for treatment failures, the percentage who tolerated the alternate product.

RESULTS

Of the patients who initially received FS, 23 (55%) tolerated the full amount offered, compared with 5 (11%) in the CS group (P < .001). Of the 57% who completely refused CS, after crossover, 20% tolerated the full amount of FS and 33% tolerated between 5 and 9 mL/kg of FS and were discharged from the hospital. The original treatment failures for FS (12%) were crossed over to CS; none tolerated more than 5 mL/kg

CONCLUSIONS

Children with mild or moderate dehydration are more likely to tolerate FS than CS. Conventional solution failures crossed over to FS had a greater tolerance rate than the reverse.

Pulsus paradoxus: an objective measure of severity in croup

We used a noninvasive monitor of arterial pressure to determine the utility of pulsus paradoxus (PP) as an objective severity measure in croup. We performed a prospective, blinded comparison of PP in children with croup versus healthy control subjects, analyzed the relationship between PP and Westley croup score (WCS), and observed the effect of racemic epinephrine (RE) on PP and WCS in a subgroup of patients with severe croup. The PP and WCS were measured at presentation and in severe patients after treatment with RE. Mean PP was 6.1 +/- 1.8 (SD) mm Hg (n = 29) in control subjects compared with a mean of 17.8 +/- 11.2 (SD) mm Hg (n = 28) in patients with croup (p < 0.00001). There was significant concordance between baseline WCS and PP (Spearman's rho: 0.68; p = 0.0001). The mean decrease in PP after RE was 7.5 +/- 11.8 (SD) mm Hg (p = 0.05; n = 12). The magnitude of decrease in PP after RE has significant concordance with the concurrent decrease in WCS (Spearman's rho: 0.73; p < 0.007). PP is elevated in children with croup, and the magnitude of elevation correlates with severity as measured by the WCS. PP may have utility as a research tool to objectively measure the severity of upper airway obstruction in croup.

Evaluation of pre- and posttreatment pulse oximetry in acute childhood asthma

OBJECTIVE

To evaluate the utility of pre- and posttreatment O2 saturation (SpO2) for prediction of admission or relapse after ED release in acute asthma exacerbations using a standardized treatment protocol.

DESIGN

A prospective, double-blind, observational study was performed at a pediatric ED. Children with acute asthma were enrolled upon ED presentation. SpO2 was measured prior to treatment and after disposition decision. Two experienced physicians determined disposition based on history and physical examination alone, while blinded to SpO2. Relapse of released patients was determined by telephone follow-up.

RESULTS

A pretreatment room-air SpO2 of < or = 91% had a sensitivity of 0.24, a specificity of 0.86, and a likelihood ratio of 1.77 to predict admission/relapse. A posttreatment room-air SpO2 of < or = 91% had a sensitivity of 0.34, a specificity of 0.98, and a likelihood ratio of 16.43 to predict admission/relapse.

CONCLUSIONS

As opposed to some previous studies, this study found pretreatment SpO2 to be a relatively poor predictor of admission. A posttreatment SpO2 of < or = 91% occurred in a minority (32%) of patients, but increased the odds of admission 16-fold and may be used as an adjunct to objectively confirm the need for admission.

Continuous, noninvasive measurement of pulsus paradoxus in patients with acute asthma

OBJECTIVE

To evaluate a continuous, noninvasive measurement technique for pulsus paradoxus (PP) as an objective asthma severity indicator.

DESIGN

Prospective, masked assessment of the relationship between PP, peak expiratory flow rate, oxygen saturation, clinical scoring, and admission decisions.

SETTING

An urban pediatric emergency department.

PATIENTS

Children with acute asthma.

INTERVENTIONS

Standardized treatment per National Heart, Lung, and Blood Institute guidelines.

MAIN OUTCOME MEASURES

Peak expiratory flow rate, oxygen saturation, pulmonary index score, and masked disposition decision.

RESULTS

Significant positive correlations existed between PP and the pulmonary index score at the initial evaluation (r = 0.44; P < .001) and after 30 minutes (r = 0.51; P < .001) and 60 minutes (r = 0.45; P < .001). Significant negative correlations existed between PP and the percent predicted peak expiratory flow rate (r = -0.31; P = .01) and the oxygen saturation (r = -0.30; P = .02). The mean PP was significantly greater in patients who were admitted for further treatment at all time points (P = .003 or P = .002). At 30 minutes after presentation, a PP greater than 15 mm Hg predicted admission for further treatment or relapse; the sensitivity was 0.42, the specificity was 0.89, and the likelihood ratio was 3.86.

CONCLUSIONS

Our measurement technique for PP is a useful objective indicator of the severity of asthma. Pulsus paradoxus correlates with clinical score, peak expiratory flow rate, and oxygen saturation. Furthermore, an elevated PP is associated with the decision to admit a patient for further treatment. These results suggest that this technique may represent a useful research tool for the assessment of acute, severe asthma. Further development of the technology may allow for a clinical application.

Yields of field-grown soybeans exposed to simulated acidic deposition

Rainfall acidity response functions for crop yield and growth are necessary to predict the overall impacts on crop yields of ambient and/or anticipated levels of acidic rain. The experiment described herein was performed at Brookhaven National Laboratory during 1984 and 1985 to determine the effects of simulated rainfalls of pH 5.6, 4.4, 4.1 and 3.3 on seed yields of four cultivars of field-grown soybeans (Glycine max Merrill). Soybeans were chosen because previous results suggested that certain varieties of this crop are sensitive to rainfall acidity and because they are an economically important crop in the USA. Sixteen plots per treatment were used. Plants were grown using standard agronomic practices under automatically movable exclusion shelters which minimize changes in the plant's microclimate. Analysis of variance of seed yields of the four cultivars showed significant treatments for all four cultivars. For all cultivars, seed yields were lower when exposed to simulated rainfalls of pH 4.4, 4.1 and 3.3 compared with rainfalls of pH 5.6. Compared with pH 5.6 rainfall (controls), yields of Amsoy exposed to pH 4.4, 4.1 and 3.3 were lower by 13, 11 and 12%, respectively. The percentage yield reductions for Asgrow, Corsoy and Hobbit were not as great as those of Amsoy. Averaged over all cultivars tested, there was a 9% seed reduction for plants exposed to simulated rain at pH 4.1 (comparable to ambient) compared with pH 5.6.