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Management
The treatment of HG is primarily supportive with intravenous fluids and antiemetics.
7,8,9
A pro­posed regimen for patients who are admitted to the OU with HG includes:
1) Vitamin B-6 (pyridoxine) IV 10–25 mg daily
2) Metoclopramide 10 mg IV, IM or orally q 6 h
(pregnancy class B)
3) Promethazine 12.5–25 mg IV, q 4–6h
(pregnancy class C)
4) Ondansetron 4–8 mg IV or orally q 6 h
(pregnancy class B)
Steroids may be used in patients refractory to standard therapy.
9,10
It is important to use steroids cautiously and only in extremely refractory cases as they can increase the risk for oral clefts in the first 10 weeks of gestation.
10
However, if using methyl­prednisolone, the patient will most likely require inpatient stay and not OU admission. Thus, the use of methylprednisolone should be reserved for the inpatient setting (not the OU) with administration as ordered by the obstetrician.
Vitamin B6 has been found to reduce nausea
and vomiting when compared with placebo.
1
Ondansetron, a serotonin-receptor antagonist, showed no benefit over promethazine, except for being more expensive.
1
Promethazine was com­pared with methylprednisolone in a randomized, double-blind, controlled trial. Methylpredniso­lone appeared to decrease the rate of readmission for HG. However, patients randomized to pro­methazine had a significantly longer duration of symptoms prior to treatment.
10
If electrolyte abnormalities occur, these can be treated in the OU. If persistent dehydration, electrolyte loss, and/or weight loss occur despite aggressive therapy, then inpatient admission is indicated.
Conclusion
Hyperemesis gravidarum is generally self-limited and, in most cases, improves by the end of the first trimester. The majority of these patients can be successfully managed in the OU setting.
References
1. ACOG. American College of Obstetrics and Gynecology Practice Bulletin: nausea and vomiting of pregnancy. Obstet Gynecol. 2004;103(4):803–814.
2. Lacroix R, Eason E, Melzack R. Nausea and vomiting during pregnancy: a prospective study of its frequency, intensity, and patterns of change. Am J Obstet Gynecol. 2000; 182 (4):931–937.
3. Bailit JL. Hyperemesis gravidarium: epidemiologic findings from a large cohort. Am J Obstet Gynecol. 2005; 193 (3 Pt 1):811–814.
4. Fell DB, Dodds L, Joseph KS, et al. Risk factors for
hyperemesis gravidarum requiring hospital admission during pregnancy. Obstet Gynecol. 2006; 107(2 Pt 1): 277–284.
5. Dodds L, Fell DB, Joseph KS, et al. Outcomes of pregnancies complicated by hyperemesis gravidarum. Obstet Gynecol. 2006; 107(2 Pt 1):285–292.
6. Holmgren C, Aagaard-Tillery KM, Silver RM, et al. Hyperemesis in pregnancy: an evaluation of treatment strategies with maternal and neonatal outcomes. Am J Obstet Gynecol 2008; 198 (1):56.e1–4.
7. Tan JY, Loh KC, Yeo GS, et al. Transient hyperthyroidism
of hyperemesis gravidarum. BJOG 2002; 109(6): 683–688.
8. Goodwin TM. Hyperemesis gravidarum. Obstet Gynecol Clin North Am. 2008; 35 (3):401–417, viii.
9. Matok I, Gorodischer R, Koren G, et al. The safety of metoclopramide use in the first trimester of pregnancy. N Engl J Med. 2009; 2528–2535.
10. Safari HR, Alsulyman OM, Gherman RB, et al. Experience with oral methylprednisolone in the treatment of refractory hyperemesis gravidarum. Am J Obstet Gynecol. 1998; 178 (5):1054–1058.
Hyperemesis Gravidarum
056
21:15:16
Subpart IVK
Chapter
53
Clinical – Pediatrics and Geriatrics
Pediatric Observation Medicine
Sharon E. Mace, MD, FACEP, FAAP
Introduction
Pediatric patients comprise about 27% of all emergency department (ED) visits.
1
There has been a 60.4% increase in ED visits from 1991, in which only 85 million patients were seen, to 2011, when approximately 136.3 million patients were evaluated in EDs, of which an estimated 36.8 million (27%) were infants and children.
2
There is every indication that this exponential growth in ED visits will continue. This growth along with the increased acuity and complexity of patients,
3
and expanded ED evaluation are critical factors leading to overcrowding in EDs, which has major negative consequences including detrimental effects on patient care and worse patient out­comes.
4
Moreover, overcrowding is not unique
to the United States, but is a worldwide problem.
5
Over the past few years, ED visits for pediatric
patients has also been increasing.
6
Infants under 12 months of age are the age group with the highest annual per capita ED visit rate.
7
Pediatric patients, like adults, also suffer from the harmful impact of overcrowding.
8
Observation medicine (OM) has been sug­gested as a potential solution to this crisis and has been successful has been in improving the quality of patient care, increasing patient/family satisfaction, decreasing missed diagnoses, creating better risk management, decreasing inappropriate hospital admissions, reducing length of stay (LOS), and creating better patient outcomes, while lowering costs.
9
This is true for pediatric
patients as well as adults.
10–12
Pathophysiology
Pediatric patients are, generally, more difficult and complex to evalu ate than adults and at a higher risk.
12,13
Infants and children often have a nonspecific complaint and subtle physical exam­ination findings. Preverbal children and infants
may be unable to communicate their symptoms. Infants and children have an increased suscepti­bility to infection, limited physiologic reserve, and developmental and/or age considerations. Diag­nostic testing and therapeutic measures can have unique considerations and challenges, ranging from concerns over radiation exposure to the difficulties in obtaining an intravenous line and/ or blood work or the need to perform sedation for procedures, even simple radiology tests.
Although most pediatric patients evaluated in the ED have a minor injury or mild illness or a benign condition, the possibility of a serious limb- or life- threatening illness/injury exists and could be easily overlooked. Indeed, analysis of malpractice awards confirms the fact that failure to diagnose or a delay in diagnosis does happen, often with disastrous consequences. Common pediatric diagnoses including gastroenteritis and appendicitis are repeatedly mentioned in mal­practice lawsuits. Indeed, gastroenteritis is the most frequent diagnosis in malpractice claims and 15% of all malpractice dollars paid are for missed appendicitis. Looking at cost per claim, missed meningitis tops the list and at number one accounts for 17% of all malpractice dollars paid.
13
Physiologic, anatomic, and developmental factors add to the complexity and risk in evaluat­ing infants and children. Patients at the extremes of age, including the very young, are known to have an increased risk of infection, including both a higher incidence and increased severity of infec­tion, due to their lesser ability to fight infection. Pediatric patients have a limited physiologic reserve. For example, their greater body surface area and lesser renal capacity to conserve water and electrolytes increases their risk for dehydra­tion, their proportionately greater head size pre­disposes them to head injury, their liver has a reduced ability to detoxify substances, and they
057
21:15:31
rely on heart rate rather than stroke volume to maintain their cardiac output.
There has also been an increase in individuals with Special Health Care Needs (SHCN) and many other high-risk pediatric patients (vulner­able population).
14
Such patients range from sur­vivors of the intensive care units (whether the Pediatric, Surgical, or Neonatal ICUs), oncology patients (on chemotherapy, radiation therapy, s/p bone marrow transplant), immunosuppressed individuals (from medications, from disease such as HIV, rheumatologic disorders, etc.) to the transplant patients (kidney, liver, pancreas, lung, heart) and those with chronic diseases (e.g., cystic fibrosis and diabetes).
Such conditions add to the complexity and risk of evaluating and managing pediatric patients, especially infants and children.
The advantages of additional time for evalu­ation and treatment, with further diagnostic testing and therapy, in these complex and high­risk infants and children are obvious. Moreover, an observation stay may have another benefit in pediatric patients. It has been suggested that the observation of infants and children with repeat examination may be preferred or at least equiva­lent to advanced diagnostic testing in some cases. For example, serial examination of the stable pediatric patient with right lower quadrant pain and a nondiagnostic or poor quality ultrasound in an observation unit (OU) may be preferable to doing an abdominal CT scan, at least in terms of avoiding radiation exposure with increased life­time risks of malignancy.
15
Background
The first OUs evolved in the 1960s and includ ed adults, while the first pediatric OUs or Short Stay Units(SSUs) came into use in the 1970s. Since then, there has been much literature regarding the use of an observation stay for adults, with diagnoses rangin g from heart failure, asthma, transient ischemic attacks (TIAs) to syn­cope, and especially chest pain with the rapid growth of chest pain units and even a Society of Chest Pain Centers.
9
In spite of this early history, there has been a relative paucity of information regarding pediatric OM, along with the recognition that there are not many pediatric observation units, which in itself is surprising considering their usefulness.
16
The
first textbook of Observation Medicine by Graff had 33 chapters, not one of which dealt with pediatrics.
17
Moreover, of the limited literature regarding pediatric OM, it almost exclusively comes from tertiary care centers. This is in spite of the fact that 81% of the infants and children evaluated in EDs are seen in smaller community hospitals
18
with combined adult and pediatric EDs, which is likely an area for future growth and research. (See pediatric OU patients in Chapter 10 Observation Medicine in Community Hospitals.)
The Principles of Pediatric Observation Medicine
No matter what the age of the patient, the defin­ition and key principles of OM are the same. OM allows patients to undergo diagnostic evaluation and/or treatment for a limited time frame, gener­ally < 24 hours. An organizational framework that provides for administrative oversight with designated staffing and coverage, design, patient accommodations, documentation requirements, policies, procedures, protocols, order sets, care paths, and performance improvement (PI) /con­tinuous quality improvement (CQI)/metrics is required for any OU.
9–12
(See Performance
Improvement, Chapter 9.)
Patients placed in observation status, whether adult or pediatric, have the following inclusion criteria: low risk, stable, low acuity, and/or low severity, low-intensity nursing care, low-intensity physician care, and non-intensive care. Criteria for exclusion include critically ill, unstable, need intensive nursing care, need intensive physician care, and have an anticipated LOS > 24 hours. (See Protocol Chapter 82.)
Differences between Pediatric and Adult Observation Medicine: Design, Supplies, Equipment, Medications
There are some differences between the adult and pediatric OU. The supplies, equipment, and medications may differ. The primary diagnoses in the adult OU are cardiac: chest pain, heart failure, syncope etc., while the top diagnoses in the pediatric OU are respiratory (asthma, bronch­iolitis, croup) and gastrointestinal (dehydration,
Pediatric Observation Medicine
057
21:15:31
gastroenteritis, vomiting, diarrhea, etc.)
12,19–21
(Table 53.1), which has implications for the need for monitoring, equipment, procedures, and medications.
The focus for the adult OU is repeat ECGs and blood draws with cardiac monitoring, whereas respiratory treatments, steroids, intra­venous fluids, and anti-emetics are prime consid­erations for the pediatric OU. Thus, there may be greater utilization of an ECG technician or a
phlebotomist in the adult OU, while the respira­tory therapist is more needed in the pediatric OU. Because of the higher frequency of dehydration/ other gastrointestinal complaints, respiratory diagnoses, and infections encountered in the pedi­atric OU versus chest pain, syncope, TIA, etc. in adults, there is a greater need for cardiac moni­toring and ECGs in adults, whereas pediatric patients may have a higher utilization of respira­tory treatments, intravenous fluids, steroids, and antibiotics when compared to adults. This may have implications for the pharmacy when stocking medications.
It has also been suggested that the pediatric OU may exhibit a more marked seasonal and monthly or daily variation in OU admissions than adults.
12,19–22
This has been attributed to the pedi­atric patient population showing greater peaks and valleys in ED visits, inpatient and OU admissions depending on whatever acute infectious illness is in the community. Thus, during rotavirus season, there may be a sudden marked increase in the number of infants and children presenting with dehydration. Similarly, during the winter (in the Northern Hemisphere) when respiratory illnesses are prevalent, there are many cases of pneumonia, croup, and bronchiolitis; during the summer these illnesses are at their nadir and trauma is more prevalent in the ED and OU pediatric patient popu­lation.
22
Spikes in the number of asthmatics seen in the ED and, correspondingly, admitted to the OU, may coincide with the occurrence of pollens, air pollutants, and/or the prevalence of respiratory ill­nesses. With adults, the main diagnoses – chest pain, heart failure, syncope, and TIA – are much less likely to have seasonal variations.
Patient- and family-centered care should be the norm. Accommodations should include the family, for example, parent or guardian, as well as the patient. Dietary requirements need to be age appropriate with formula for infants, appro­priate tube feedings for those with feeding tubes and palatable for the child and adolescent as well as considering those with specialized diets: dia­betic, cardiac, lactose intolerant, etc. Toys, games, and videos help make the OU patient friendly for the child or adolescent. The pediatric OU will need cribs and appropriate size beds depending on the ages admitted. This may allow for more rooms in a fixed space in a pediatric OU than an adult OU, provided there are provisions for the parent(s) in the room. (See Chapter 5 on Design.)
Table 53.1 Most Common Diagnoses in an Observation Unit*
Pediatric** Adult***
1. Asthma
2. Dehydration
3. Gastroenteritis
4. Pneumonia
5. Abdominal pain
6. Seizures
7. Fever
8. Bronchiolitis
9. Croup
10. Poisonings
11. Trauma
1. Chest pain
2. Abdominal pain
3. Asthma: acute exacerbation
4. Congestive heart failure (CHF)
5. Chronic obstructive pulmonary disease: acute exacerbation
6. Syncope
7. Transient ischemic attack (TIA)
8. Ureterolithiasis
9. Pyelonephritis
10. Cellulitis/Uncomplicated Soft Tissue Infections
11. Gastrointestinal bleeding
12. Acute atrial fibrillation
13. Other non TIA, non CVA neurologic disorders
14. Acute back pain
15. Deep vein thrombosis
16. Trauma
17. Toxicology/overdose
* Represents the common diagnoses seen in our
observation unit from 1994 to 2015.
** Pediatric diagnoses are listed in order of prevalence. Our
prevalence is consistent with other units.
*** In adults, chest pain is undoubtedly the most common
diagnosis in our unit and in other observation units, with about 80% estimated prevalence.
9
Depending on the individual observation unit, the prevalence of other diagnoses varies greatly depending on many factors including inclusion/exclusion criteria, age of the patient population seen in the ED; such as high percentage of elderly, hospital specialty (subspecialty availability and referral patterns), trauma vs. nontrauma, designated stroke center, etc. However, generally, abdominal pain and asthma are the next most common diagnoses, with syncope, TIA, CHF, COPD exacerbation, genitourinary complaints (kidney stones, pyelonephritis) and uncomplicated skin infections in the top ten adult diagnoses.
Sharon E. Mace
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21:15:31
Patient Population: Adult versus Pediatric Patients
As with adults , there are three main categories of patients: those with a known diagnosis who need treatment (e.g., heart failure, asthma), those with a condition or complaint (e.g., chest pain or abdominal pain) who need a diagnostic evalu­ation, and those with a known diagn osis who need monitoring or observation (including atrial fibril­lation, syncope, seizure and overdose).
12
As men­tioned, the primary diagnoses differ between the adult and pediatric patients (Table 53.1).
According to the results over 20 years at our
large, urban, academic, non-trau ma, tertiary care referral center in the United States with a hybrid OU, where hybrid is defined as an OU that accepts both adult and pediatric patients, the most common diagnoses for the pediatric patients were (in order of frequency) asthma, dehydration, gas­troenteritis, pneumonia, abdominal pain, seizures, fever, bronchiolitis, and croup. Results from other exclusively pediatric OUs in the United States and internationally have similar results.
22–26
For the adults, the leading diagnoses (in order of fre­quency) were chest pain, heart failure, abdominal pain, syncope, asthma, COPD, dehydration, gas­trointestinal bleed, and pneumonia.
12,19–21
Thus, there is less need for cardiac (rhythm strip) moni­toring in the pediatric OU.
Patient Population: Pediatric Patients in a Pediatric OU
In the United States, the overwhelming majority of pediatric patients in an OU are medical, which is consistent with our findings,
19–21
with
only 6.0–7.5% of patients in several studies being a surgical or traumatic condition.
9,27
There is one
exception, a study from a Pediatric Childrens Hospital in Australia with a mixed patient popu­lation that included procedural patients in their OU. They still found the majority of patients were medical, although there was a much higher percentage of surgical patients: medical 56%, surgical 30%, and the remainder procedural or psychological.
28
The percentage of pediatric patients placed in observation status from the ED also varies and has been reported as 2.9%, 4.0%, and 4.8%, respectively, in the United States.
22,25,26
The mean
age (years) for pediatric OU patients ranged from
4.36, 4.7, and 6.0 (United States) to 6.23 (Scot­land), with one French study having a much lower median age of 26 months.
22,23,25,27,29
Reported mean LOS (hours) for the pediatric
OU patients ranged from 8.4 to 20.5: Australia
17.5 (community hospital) and 20.5 (tertiary care hospital); France 14; United States 8.4, 13, 14.7, 15, and 15.6 hours.
9,22–26,30
The LOS (median) may vary depending on the diagnosis with respiratory patients tending to have longer LOS (median): 21.3 (croup) and 16.5 (asthma) versus poisoning 14.35 or head trauma 13.
9,31–33
The percentage of patients admitted to the hos­pital from the pediatric OU is quite variable and ranged from a low of 4% (community hospital, Australia) to a high of 22% (United States)
28,30
with rates in between these two extremes: 10.4%, 12%, and 20.3%.
24–26
The percentage of OU patients admitted to the hospital is likely influ­enced by multiple variables, of which the diagnosis is one factor. An early study of pediatric OU patients with gastrointestinal illnesses found
81.5% were discharged home, while discharge rates for neurologic illnesses (e.g., seizures, head trauma) were in the 90% range.
34
Amorerecentstudy found the highest admission rate to inpatient from the OU was for seizure patients (19%) followed by asthma (16%) and croup (9%), while the lowest inpatient admission rates were for enteritis/dehy­dration at 5% and poisonings at 4%.
25
Another study had similar findings with respiratory illnesses having the highest inpatient admission rates from the OU at 50% for pneumonia, 46% for bronchio­litis, 33% for infections, 23% for asthma, and 17% for croup. Differing from the other studies, they found a fairly high admission rate for gastroenter­itis at 21%, but only 5% for seizures and 2% for trauma.
30
A study of pediatric closed head injuries found only a 5% admission rate to an inpatient unit from the OU and a study of pediatric poison exposures found a 5.4% hospitalization rate from the OU.
32,33
In general, for pediatric OU patients, it seems that poison exposures (nonintentional) and stable blunt trauma have low hospital admission rates (5%), while respiratory conditions (asthma, bronchiolitis, croup, pneumonia) and infections have the highest admission rates based on diagnosis.
25,26,30
Reasons for the differences in LOS and admis­sion rates, etc. may include specific diagnosis or condition, varied setting (academic, tertiary, teaching vs. nonacademic or community
Pediatric Observation Medicine
057
21:15:31
hospital), country, and the inclusion of proced­ural patients and/or holdingadmitted patients.
International Perspective
There may be some differences in the types of pediatric patients placed in a pediatric OU depending on the international location. A ques­tionnaire sent to facilities in the United Kingdom noted that 50% of the accident and emergency departments surveyed had a short-stay ward. Of these, one-fourth admitted small numbers of chil­dren, who are mainly children who have sustained trauma-related problems.
35
This is quite different from other countries (France, Australia, and United States), in which medical patients far outnumbered the surgical patients.
19–21,23,25,26,28,30
In some regions/countries, trauma patients are admitted to the hospital and are not considered for placement in an OU. The United Kingdom study was also a survey and did not report actual patient data from a given OU(s) and may be associated with the usual problems of any survey instrument.
Advantages of Pediatric Observation Medicine
Cost-Effective
Like adult OM, pediatric OM can have many benefits. Pediatric OM has been shown to be cost-effective. Two studies of pediatric asthmatics and one in croup patients documented this fact. One report by OBrien et al. in asthmatics found the average charge for an inpatient was over five times greater than for the holding unit.
36
The cost for asthmatic patients hospitalized as inpatients for 1 day was one-and-a-half times greater than the charges for patients in the holding unit in the Willett et al. study.
37
For patients with croup, there was an overall reduction in resource utiliza­tion with the medi an charge significantly decreased (p = 0.03) for OU patients: pre-OU group was $1,685 versus $1,387 for the post-OU group.
31
After institution of a short stay unit, an Australian study estimated a cost savings for 1 year of $1/2 million for one hospital and $2.3 million for another hospital.
28
Quality of Patient Care
A study evaluating the 16-year experience with croup at an Australian teaching hospital found
that the implementation of the mandatory use of corticosteroids in 1991 lead to a decrease in the LOS (from 2.3 days between 1985 and 1990 to 1 day in 1991), number of intubations, and the number of ICU admissions. Next, in 1993, they mandated the use of corticosteroids in their OU and found a marked improvement in their OU discharge rate from 80% in 1991–1992 to 97% in 1993–1995 or conversely a drop in their admis­sion rate from the OU to the inpatient ward from 20% admitted to only 3% admitted.
38
Comparable patient care or improved patient care has been attributed to the pediatric OM. Use of a pediatric OU for pediatric patients with poison exposures and for pediatric blunt head trauma patients, respectively, found no adverse events as a result of OU placement.
3
Multiple studies of pedi­atric asthma patients have documented that treat­ment in the OU is medically effective, safe, and cost-effective.
3
In the Gururaj et al. study of pedi-
atric asthma tics treated in a holding unit, only
1.5% returned to the ED and none needed admission.
39
Decreased Hospital Admissions
Studies have documented that the institution of a pediatric OU does decrease hospital admissions. There was a significant (p < 0.0001) reduction in ward admission rates from 9.5% to 4.2% for chil­dren/infants with croup after the introduction of a pediatric OU.
31
A review of pediatric emergency medicine by Knapp also found that OUs were valuable in avoiding a hospital admission for patients with ingestions.
40
A Canadian study in pediatric asthmatic patients found a significant (p 0.01) decrease in inpatient admissions from 17% (pre-OU) to 10% (post-OU), but with a sig­nificantly (p = 0.01) increased rate of repeat visits to the ED after discharge (3% pre-OU vs. 5% post­OU).
41
This increased rate of return appears to be an exception to the rule with all other studies showing no increase or a decrease in return visits to the ED.
Rate of Returns to the Emergency Department and Readmissions
Readmissions for hospitalized asthmatic patients were higher than for holding unit patients. At 1-month follow-up, returns to the ED and readmissions were: those admitted < 1 day had
Sharon E. Mace
057
21:15:31
31.1% returns to ED with 12.5% readmissions, those admitted > 1 day had 13.5% returns to ED with 7.7% readmissions, compared with holding unit patients who had 11.4% returns to the ED with no (0%) readmissions.
37
The study by Guoin et al. looked at the rate of return visits within 72 hours for pediatric asthmatics before and after the initiation of an OU. Their results were pre­observation 12.5% (44/352) returns to the ED with 39% (17/44) readmitted versus post observa­tion 24.3% (85/350) returned to the ED but fewer needed readmission, only 28% (24/85).
41
Another study in asthmatics found no increase in hospital admission rate after opening an OU.
42
Only 1.5% of asthmatics treated in a holding unit returned to the ED and none needed readmission in the report by Gururaj et al.
39
According to the OBrien
et al. study, 7% (5/71) of asthmatics returned to the ED within 1 week of treatment in the holding unit with 5.6% (4/71) readmitted.
36
Length of Stay
The pediatric OU has a decrease in LOS when compared to inpatient hospitalization. The median LOS for pediatric asthmatic patients treated in an OU is 16.5 hours with a discharge rate of 67–75%.
9,36,37,41
In one study for pediatric blunt head trauma patients, the median LOS was 13 hours with a discharge rate of 95%.
33
Astudy from the United States found a significant decrease (p = 0.03) from 27.2 to 21.3 hours in median LOS for patients with croup after the introduction of a pediatric OU.
31
A study comparing low-risk hyper­bilirubinemia patients treated in an OU with inpa­tient hospitalization demonstrated 82% of patients were successfully discharged from the OU and OU patients had a shorter LOS of 18 hours compared to 42 hours as an inpatient.
44
Patients with intuss­ception (successfully reduced by contrast enema) when managed in the ED OU had a significantly shorter LOS than those admitted to the hospital (mean LOS 7.2 vs. 22.7 hours) with no difference in outcome.
45
Patient, Parental and Physician Satisfaction
Another benefit attributed to OM is increased satisfaction of patients and physicians. The study by Rydman et al. showed adult patien ts were more satisfied and had fewer problems with the OU
than they did with routine hospitalization.
43
Rentz et al. found that the model of a pediatric ED­controlled OU received high satisfaction ratings in all areas by community and subspecialty physicians.
46
Characteristics of Pediatric OU Patients that Predict Admission
Factors associated with an inappropriateOU admission, defined as a prolonged LOS (> 24 hours) or a short stay < 4 hours were evaluated in one study. They found that 3% of patients were discharged home in < 4 hours and 7% of patients were discharged home in > 24 hours. Variables identified as significantly associated with an increased risk of inapprop riate admissions were age < 1 year, CT or MRI done, IV fluids or medications, and cardio-respiratory monitoring. One drawback to this study was the inclusion of non-OU patients: some patients were in a holding unit, some in a medical assessment and planning unit, and others (the majority) were in an OU.
23
In another study, age was not seen as a risk factor for inpatient admission.
26
In a study of asthmat­ics, need for supplemental oxygen at the end of ED management, fever (temperature 38.5°), and female gender were associated with need for inpatient admission from the OU.
46
Hybrid Unit
The term hybridunit has several usages.
11,12
If an OU accepts both adult and pediatric patients in the same unit, this is a hybrid unit. If the unit accepts both ED patients for further diagnostic evaluation and/or treatment and other types of patients, spe­cifically, patients undergoing procedures, particu­larly at a time when the OU may not be fullwith ED patients, this has also been termed a hybrid unit. This hybrid unit attempts to make use of the varied admit/discharge cycle of the typical OU which tends to be busiest during the evening shift with ED patients being placed into observation status, and full at night. Most of the patient dis­charges are in the morning, so there may be some temporary bed availability in the afternoon for non-typical OU patients (post recovery, awaiting procedures, etc.). There is a possible danger with this hybrid plan in that on any given day, if the ED is busy, ED patients may be backed up waiting for an OU bed, although this has not been reported.
Pediatric Observation Medicine
057
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The Future
There is tremendous potential for exponential growth in pediatric OM throughout the world. One study from the United States recommends that 70% of all asthmatics be treated in an OU.
47
An editorial from the United States suggests that two-thirds to three-fourths of all asthmatics are potential candidates for an OU instead being treated as an inpatient.
48
A Canadian health policy report estimates that 39% of pediatric and 25% of adult patients could be treated in an OU instead of receiving care as an inpatient.
49
Summary
Like adult OM, pediatric OM needs the same organizational structure and format. Similarly, no matter what the patient’sage,OMhasmany advantages: cost effectiveness, better patient/family satisfaction, decreased liability, enhanced risk man­agement, psychosocial benefits, decreased LOS, and most importantly, better patient care and improved patient outcomes. There are some dif­ferences, however, between OM for infants and
children compared to adults: different diagnoses, and different types of needed resources. Unique features of pediatric OM include less need for cardiac monitoring, increased use of respiratory therapy, greater need for IV fluids, and different types of pharmacology usage with antibiotics and antiemetics being the most common medications. It is very likely that pediatric OM, like adult OM, will be expanding in the future.
Some units exclude psychiatric patients from a general OU (as we do) since these patients often need one on one supervision, more intensive nursing observation and it may be disruptive to have a acutely ill psychiatric patient in the bed next to a low risk chest pain patient. An accidental overdose in a nonpsychiatric patient may be acceptable as an appropriate candidate for the OU. There is also the emergence of separate psy­chiatric OUs specifically for psychiatric patients, who are often intoxicated and need to be observed and reevaluated when they are soberand not under the influence of drugs and/or alcohol. (See editors note on Psychiatric Chapter 60.)
References
1. Emergency Care for Children: Growing Pains. Committee on
the Future of Emergency Care in the United States Health System. (ISBN: 0–309­65964–7). ch. 1 Introduction, p.18. National Academies Press. www.nap.edu/catalog/
11655.html (Accessed February
2016)
2. www.cdc.gov/nchs/fastats/ emergency-department .htm (Accessed February
2016)
3. Lamb S, Washington DL, Fink A, et al. Trends in the Use and Capacity of California’a emergency departments 1990–1999. Ann Emerg Med 2002; 39:389–396.
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