One-handed versus two-handed chest compressions in paediatric cardio-pulmonary resuscitation

OBJECTIVES

To determine emergency department (ED) staff preference for one- or two-handed paediatric chest compressions and to determine if there was a difference in compression rates delivered and fatigability between the techniques.

METHODS

This was a randomised, cross-over observational study of paediatric CPR performed on a standard paediatric manikin by ED staff. Consenting, eligible staff [ED doctors and nurses] performed CPR in pairs with chest compressions delivered using a one- and two-handed technique. The outcomes of interest were compression rates for one- and two-handed CPR, decrease in compression rate over time for each technique and staff preference for technique. Data was analysed using descriptive statistics, Chi Square test and Mann-Whitney U-test as appropriate.

RESULTS

Sixty-two ED staff participated in the study. Compression rates with both techniques were similar and higher than guidelines recommend (133.6 min(-1) for one-handed and 135.7 min(-1) for two-handed respectively). The compression rate slowed by 6.9 compressions/min over 1 min in one-handed compressions compared with 2.6 compressions/min in two-handed compressions (p = 0.0264). 65.6% of participants reported that they preferred the two-handed compression technique.

CONCLUSION

This study showed that CPR compression rate is similar with one- and two-handed compression techniques, but compression rate decreased more quickly with the one-handed technique. The majority of staff preferred the two-handed compression technique for reasons of ease, control and uniformity with other CPR techniques.

A meta-analysis of two randomized, double-blind, placebo-controlled, phase III studies in patients (pts) with metastatic colorectal cancer (mCRC) receiving FOLFOX4 and PTK/ZK to determine clinical benefit on progression-free survival (PFS) in high LDH pts

3529

Background: PTK/ZK is an oral, antiangiogenic inhibitor of tyrosine kinase signaling of all known vascular endothelial growth factor receptors (VEGFR). PTK/ZK in combination with FOLFOX4 has been investigated in first line (CONFIRM 1[C1]) and second line (CONFIRM 2 [C2]) mCRC pts. Methods: In both trials, pts were randomized to receive PTK/ZK or placebo. Since high LDH and poor performance status (PS) have been shown to indicate poor prognosis in mCRC, pts were stratified by baseline serum LDH (≤ or > 1.5 X ULN) and PS (0, 1–2), yielding 4 strata per trial. Exploratory analysis of the high LDH strata in C1 indicated that these pts may derive the most benefit from PTK/ZK treatment. The purpose of this pre-planned meta-analysis of C1 and C2 is to determine whether the treatment effect of C1 and C2 are consistent. Results: Both trials showed strikingly similar results. High LDH pts comprise approximately 30% of the total pt population. PTK/ZK seems to have the same strong effect on PFS in high LDH pts in both 1st and 2nd line mCRC with a HR for PFS of 0.67 (p =0.010) for C1 and 0.63 (p < 0.001) for C2 (N=250 and N=316, respectively). The safety profile of PTK/ZK was highly consistent. The most frequent grade 3/4 AEs attributable to PTK/ZK were hypertension, diarrhea, fatigue, nausea, vomiting and dizziness. Increases in AEs associated with antiangiogenic therapy such as bowel perforations and bleeding complications were not observed in the PTK/ZK arms of both trials. In the meta-analysis, PTK/ZK effect on PFS is moderate in the overall population (HR 0.85, p-value 0.005). In contrast, the effect on PFS is strong and clinically meaningful in the high LDH population (HR 0.65, p-value < 0.001, N=566). Conclusion: This meta-analysis is the largest study of poor prognosis pts with high serum LDH in metastatic colorectal cancer. These data suggest that PTK/ZK significantly improves PFS in high LDH pts. Further evaluation of PTK/ZK in this pt population is planned.

[Table: see text]

Head computed tomography guidelines are being followed

OBJECTIVE

Several guidelines have been developed to direct the ordering of head computed tomography (CT) for patients, but most are clinical presentation-specific. Recently, an integrated guideline for ordering emergent head CT for patients who present to the ED of Western Hospital, Footscray, Victoria, Australia, was developed in response to concerns raised regarding perceived over-utilization of head CT for ED patients. Our aim was to determine compliance with the guideline.

METHODS

This was an explicit retrospective medical record review of patients who presented to the ED of Western Hospital between 1/04/2004 and 17/6/2004 and had a head CT as part of their assessment. Clinical information for these cases was compared with guideline recommendations. Data are described by descriptive statistics.

RESULTS

Of the 231 cases that were included in the study, 65 (28.1%, 95% confidence interval 23-35%) had abnormal CT findings. Guidelines were adhered to in 217 (93.9%, 95% confidence interval 91-97%) cases. For the cases where the guidelines were not adhered to (14; [6.1%]), there was only one abnormal scan the clinical significance of which is not clear.

CONCLUSION

The study found that compliance with head CT guideline was high. This suggests that the guideline is both clinically relevant and supported by ED doctors or conversely that the guideline is concordant with existing ordering practices of the ED.

Improved search for nu(mu) --> nu(e) oscillation in a long-baseline accelerator experiment

We performed an improved search for nu(mu) --> nu(e) oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2 x 10(19) protons on target. No evidence for a nu(e) appearance signal was found, and we set bounds on the nu(mu) --> nu(e) oscillation parameters. At Deltam(2)=2.8 x 10(-3) eV(2), the best-fit value of the K2Knu(mu) disappearance analysis, we set an upper limit of sin(2)2theta(mue) < 0.13 at a 90% confidence level.

How is deep vein thrombosis diagnosed and managed in UK and Australian emergency departments?

BACKGROUND

Recent research has identified technologies that may be of value in the diagnosis and management of deep vein thrombosis (DVT). We aimed to survey current practice in the United Kingdom (UK) and Australia to determine the extent to which these technologies have been implemented in these two healthcare systems.

METHODS

We undertook a postal survey of 255 hospitals in the UK and 89 hospitals in Australia, requesting details of individual diagnostic tests, use of diagnostic algorithms, and management of DVT.

RESULTS

We received replies from 186/255 UK hospitals (73%) and 84/89 of Australian hospitals (94%). Ultrasonography and laboratory based D-dimer were the most commonly available tests. We received 43 different algorithms from 51 hospitals. With only a very few exceptions, DVT diagnosis was ruled in by positive venography or positive ultrasound without venographic confirmation. By contrast a variety of different criteria were used to rule out DVT. Most algorithms used a combination of low clinical risk and negative D-dimer to rule out DVT, but some required all patients to receive ultrasound or venography. Few ruled out on the basis of low clinical risk or negative D-dimer alone. Low molecular weight heparins were overwhelmingly the treatment of choice for established DVT. Most departments (214/264; 81%) offered outpatient treatment.

CONCLUSION

Recently developed technologies for the diagnosis and treatment of DVT have been widely implemented in the UK and Australia. Variation in practice, and thus presumably uncertainty, seems to be greatest in relation with the criteria used to rule out DVT.

Functional categories of TP53 mutation in colorectal cancer: results of an International Collaborative Study

BACKGROUND

Loss of TP53 function through gene mutation is a critical event in the development and progression of many tumour types including colorectal cancer (CRC). In vitro studies have found considerable heterogeneity amongst different TP53 mutants in terms of their transactivating abilities. The aim of this work was to evaluate whether TP53 mutations classified as functionally inactive (< or=20% of wildtype transactivation ability) had different prognostic and predictive values in CRC compared with mutations that retained significant activity.

MATERIALS AND METHODS

TP53 mutations within a large, international database of CRC (n = 3583) were classified according to functional status for transactivation.

RESULTS

Inactive TP53 mutations were found in 29% of all CRCs and were more frequent in rectal (32%) than proximal colon (22%) tumours (P < 0.001). Higher frequencies of inactive TP53 mutations were also seen in advanced stage tumours (P = 0.0003) and in tumours with the poor prognostic features of vascular (P = 0.006) and lymphatic invasion (P = 0.002). Inactive TP53 mutations were associated with significantly worse outcome only in patients with Dukes' stage D tumours (RR = 1.71, 95%CI 1.25-2.33, P < 0.001). Patients with Dukes' C stage tumours appeared to gain a survival benefit from 5-fluorouracil-based chemotherapy regardless of TP53 functional status for transactivation ability.

CONCLUSIONS

Mutations that inactivate the transactivational ability of TP53 are more frequent in advanced CRC and are associated with worse prognosis in this stage of disease.

Adverse events associated with the use of intravenous epinephrine in emergency department patients presenting with severe asthma

STUDY OBJECTIVE

We determine the rate of adverse effects associated with the use of intravenous (IV) epinephrine by infusion for the treatment of severe asthma in the emergency department (ED).

METHODS

This retrospective, structured, medical record review included adult patients who presented to the ED of Western Hospital between 1998 and 2003 and who were triaged as category 1, 2, or 3, had a discharge diagnosis of asthma, and were administered IV epinephrine in the ED. Patients were excluded if they were older than 55 years or if a diagnosis of asthma was not confirmed. The primary outcome measures were occurrence of cardiac arrhythmia or ischemia, local tissue ischemia, hypotension or hypertension, neurologic injury, or death related to epinephrine infusion.

RESULTS

Two hundred twenty episodes of care met the inclusion criteria. Adverse events occurred in 67 episodes (30.5%; 95% confidence interval [CI] 24.5% to 37.1%); however, most were minor and self-limiting. There were no deaths. Major adverse events occurred in 3.6% of cases (8/220; 95% CI 1.7% to 7.3%), including 2 cases of supraventricular tachycardia, 1 case of chest pain with ECG changes, 1 case of incidental elevated troponin, and 4 cases of hypotension requiring intervention.

CONCLUSION

IV epinephrine is associated with a low rate of major and a moderate rate of minor adverse events in patients with severe asthma; however, a causal relationship has not been established. Further research investigating effectiveness, as well as safety, is warranted.

Do we need to measure total serum IgA to exclude IgA deficiency in coeliac disease?

BACKGROUND

Screening for IgA deficiency in patients with coeliac disease is essential because of the increased incidence of IgA deficiency associated with the disease, which usually relies on the estimation of IgA levels in each case.

AIM

To devise a method of excluding IgA deficiency without measuring total serum IgA in each case.

MATERIALS AND METHODS

The optical density readings on enzyme-linked immunosorbent assay (ELISA) of 608 routine samples received for tissue transglutaminase (TTG) antibody testing for coeliac disease were compared with their total IgA concentrations. Dilution experiments were also carried out to ensure linear relationships between optical density on ELISA and IgA concentrations and to compare the sensitivities for TTG and endomysium antibodies in TTG-positive samples.

RESULTS AND DISCUSSION

A clear relationship was shown between total IgA concentration and TTG optical density readings by ELISA. To ensure a positive TTG result if antibodies are present, it was possible to recommend an optical density level above which all samples have sufficient IgA. Samples with optical density <0.05 should be investigated further by estimating total IgA and, if low, samples should be subjected to immunofluorescence microscopy testing for IgA and IgG endomysium antibodies.

CONCLUSIONS

An easier, more cost-effective and practical way of excluding IgA deficiency in the investigation on coeliac disease is reported.

Comparison of the effects of continuous subcutaneous insulin infusion (CSII) and NPH-based multiple daily insulin injections (MDI) on glycaemic control and quality of life: results of the 5-nations trial

AIMS

The goal of the study was to determine whether continuous subcutaneous insulin infusion (CSII) differs from a multiple daily injection (MDI) regimen based on neutral protamine hagedorn (NPH) as basal insulin with respect to glycaemic control and quality of life in people with Type 1 diabetes.

METHODS

The 5-Nations trial was a randomized, controlled, crossover trial conducted in 11 European centres. Two hundred and seventy-two patients were treated with CSII or MDI during a 2-month run-in period followed by a 6-month treatment period, respectively. The quality of glycaemic control was assessed by HbA(1c), blood glucose values, and the frequency of hypoglycaemic events. For the evaluation of the quality of life, three different self-report questionnaires have been assessed.

RESULTS

CSII treatment resulted in lower HbA(1c) (7.45 vs. 7.67%, P < 0.001), mean blood glucose level (8.6 vs. 9.4 mmol/l, P < 0.001) and less fluctuation in blood glucose levels than MDI (+/- 3.9 vs. +/- 4.3 mmol/l, P < 0.001). There was a marked reduction in the frequency of hypoglycaemic events using CSII compared with MDI, with an incidence ratio of 1.12 [95% confidence interval (CI): 1.08-1.17] and 2.61 (95% CI: 1.59-4.29) for mild and severe hypoglycaemia, respectively. The overall score of the diabetes quality of life questionnaire was higher for CSII (P < 0.001), and an improvement in pump users' perception of mental health was detected when using the SF-12 questionnaire (P < 0.05).

CONCLUSION

CSII usage offers significant benefits over NPH-based MDI for individuals with Type 1 diabetes, with improvement in all significant metabolic parameters as well as in patients' quality of life. Additional studies are needed to compare CSII with glargine- and detemir-based MDI.

Potential health promotion benefits of lipid testing for all patients presenting with chest pain to an emergency department

OBJECTIVES

To establish the prevalence of previously undiagnosed dyslipidaemia in patients presenting to the emergency department (ED) with non-traumatic chest pain and, more particularly, the prevalence in the subgroup which was discharged home from the ED, the group that traditionally would not have received a lipid test.

METHODS

Prospective, observational study of adult patients presenting to an ED with non-traumatic chest pain as the presenting complaint.

RESULTS

A total of 185 eligible patients underwent lipid testing during their presentation: 96 in the ED and 89 in the wards. Overall 61% (n = 112) of patients had at least one abnormal lipid level. Of patients discharged from the ED, 62% had at least one abnormal lipid level.

CONCLUSIONS

A moderate, but useful, increase in detection rates of dyslipidaemia is possible if lipid testing is offered to all patients presenting with chest pain, and not just to those who are admitted to wards for further investigation and management of suspected acute coronary syndromes. Testing of this group should be considered as a health promotion initiative in the ED, with appropriate follow up in the community.

379 LACTATION INDUCTION IN PREPUBERTAL BULLS AND HEIFERS AS A TOOL FOR PREDICTING MAMMARY SPECIFIC TRANSGENE EXPRESSION IN CATTLE

The bovine's long generation interval results in a lapse, from the time of birth, of two to three years before mammary-specific transgenes can be assessed in genetically engineered animals. This experiment was conducted in an attempt to reduce that waiting period by up to two years. Lactation was induced in prepubertal bull and heifer calves, 3 to 8 mo of age, as a means of predicting transgene behavior during subsequent normal lactations in the heifers and daughters of bulls. Transgenic animals tested were either founder animals, produced by somatic cell nuclear transfer, or G1 offspring of founder bulls. The transgene consists of a lactation specific sequence encoding lysostaphin, an antimicrobial protein targeted against Staphylococcus aureus, a mastitis-causing pathogen. Estrogen, progesterone, and dexamethasone were administered as previously described (Ball et al. 2000 J. Dairy Sci. 83, 2459) to nine heifers (transgenics = 5) ranging in weight from 90 to 165 kg. Eight bull calves (transgenics = 7) weighing from 81 to 178 kg received additional estrogen and progesterone injections as well as reserpine prior to dexamethasone treatment. Animals were hand-milked twice daily for 4 to 7 days. All nine heifers responded to the milk induction scheme, yielding between 19 mL and 4.5 L. Milk volume from the three responding males (100 �L to 2.5 mL) was significantly less than that harvested from females (P = 0.025). Only bull calves over 150 kg had a positive response. Transgenic females produce less milk then non-transgenics (313 � 494 vs. 2276 � 552 mL, respectively; P = 0.033). Most importantly, there was no detectable difference between the concentration of lysostaphin in milk from induction (8.1 � 2.7 �g/mL) and natural lactations (3.5 � 2.6 �g/mL) in the four transgenic heifers tested (P = 0.229). The result was the same when lysostaphin was analyzed as a percentage of total protein (P = 0.427). Induction of a G1 heifer and a bull calf from the same founder bull produced similar lysostaphin concentrations in their milk (5.6 � 0.9 and 5.2 � 0.5 �g/mL; respectively). �-lactoglobulin concentration was also similar during induced and natural lactation (P = 0.165) for all animals studied. However, total protein was greater in induced milk samples compared to natural lactation samples (28.4 � 1.7 vs. 21.2 � 1.7 mg/mL; P = 0.007) as was lactoferrin (707 � 51 vs. 213 � 51 �g/mL; P < 0.001). Conversely, compared to that in induced milk samples, lactose was more concentrated in the natural lactation samples (34.6 � 2.5 vs. 46.0 � 2.1 g/L). In this study transgene expression was detected in milk from induced lactations and its concentration in those samples was generally predictive of product concentration in the natural lactation milk. The induction protocol was effective in male (>150 kg) and female calves.

Virtual Microscopy in Virtual Tumor Banking

Many systems have already been designed and successfully used for sharing histology images over large distances, without transfer of the original glass slides. Rapid evolution was seen when digital images could be transferred over the Internet. Nowadays, sophisticated virtual microscope systems can be acquired, with the capability to quickly scan large batches of glass slides at high magnification and compress and store the large images on disc, which subsequently can be consulted through the Internet. The images are stored on an image server, which can give simple, easy to transfer pictures to the user specifying a certain magnification on any position in the scan. This offers new opportunities in histology review, overcoming the necessity of the dynamic telepathology systems to have compatible software systems and microscopes and in addition, an adequate connection of sufficient bandwidth. Consulting the images now only requires an Internet connection and a computer with a high quality monitor. A system of complete pathology review supporting biorepositories is described, based on the implementation of this technique in the European Human Frozen Tumor Tissue Bank (TuBaFrost).

Search for coherent charged pion production in neutrino-carbon interactions

We report the result from a search for charged-current coherent pion production induced by muon neutrinos with a mean energy of 1.3 GeV. The data are collected with a fully active scintillator detector in the K2K long-baseline neutrino oscillation experiment. No evidence for coherent pion production is observed, and an upper limit of is set on the cross section ratio of coherent pion production to the total charged-current interaction at 90% confidence level. This is the first experimental limit for coherent charged pion production in the energy region of a few GeV.

Prevention of childhood obesity by reducing soft drinks

AIMS

The increasing prevalence of childhood obesity is a global problem. There are a variety of environmental factors that may be contributing to this increase. One such factor may be the increased consumption of soft drinks.

OBJECTIVE

This review will describe some of the latest research that has examined the association between obesity and the consumption of soft drinks.

RESULTS

The association between the consumption of sugar-sweetened drinks and childhood obesity has been established in three separate American studies. It has been found that children who consume these drinks have a higher energy intake and are more likely to become overweight. In adult women, the consumption of sugar-sweetened soft drinks has been associated with an increased risk of developing diabetes. In the United Kingdom, a school-based initiative focusing on reducing the consumption of these drinks has also been effective in preventing a further increase in obesity.

CONCLUSIONS

There is an association between obesity and consumption of soft drinks. Initiatives focusing on reducing the consumption of these drinks may help to prevent a further increase in childhood obesity.

Validation of venous pCO2 to screen for arterial hypercarbia in patients with chronic obstructive airways disease

To validate a previously derived venous pCO2 (pvCO2) cut-off for ruling out arterial hypercarbia in patients with chronic obstructive pulmonary disease (COPD), matched arterial and venous blood gas samples were taken from a convenience sample of patients who presented to the Emergency Department (ED) with COPD deemed by their treating doctor to require arterial blood gas (ABG) analysis as part of their care. The screening cut-off was defined as pvCO2 of > 45 mm Hg and arterial hypercarbia was defined as arterial pCO2 (paCO2) of > 50 mm Hg. Descriptive statistics were employed. Sensitivity, specificity and negative predictive value were calculated. There were 112 patients enrolled in the study, of whom 107 had complete data for analysis. Forty-three patients had arterial hypercarbia (range of 51 to 90 mm Hg, median 60 mm Hg). All cases of arterial hypercarbia were detected by the screening cut-off (sensitivity 100%; 43/43; 95% CI 91-100%; specificity 47%, 95% CI 35-59%). The negative predictive value of pvCO2 < 45 mm Hg was 100% (30/30, 95% CI 89-100%). Assuming the ABG was performed to assess hypercarbia, 29% of ABGs potentially could have been avoided if a venous screening test was employed. In conclusion, pvCO2 can be used as a screening test for arterial hypercarbia, and if employed, can potentially reduce the requirement for ABG sampling.

The Quality of Medical Record Review Studies in the International Emergency Medicine Literature

STUDY OBJECTIVE

We assess the methodologic quality of studies using medical record review methodology in 4 international emergency medicine journals. A secondary aim was to compare methodology quality among these journals and across years.

METHODS

This was an observational study of articles whose main methodology was medical record review published in Academic Emergency Medicine (AEM) , Annals of Emergency Medicine (Annals) , Emergency Medicine Journal (EMJ) , and Emergency Medicine Australasia (EMA) between January 2002 and May 2004. Eligible articles were reviewed for reporting of a clear hypothesis or objective, training of abstractors, defined inclusion and exclusion criteria, use of a standard abstraction form, definition of important variables, monitoring of abstractor performance, blinding of abstractors to study hypothesis, reporting of interrater reliability, sample size or power calculation, reporting of ethics approval or waiver, and disclosure of funding source. The primary outcome was the proportion of articles meeting each criterion. Secondary outcomes were comparison of the proportions of articles meeting each criterion among journals and by years.

RESULTS

One hundred seven articles were analyzed; 31 were published in AEM, 29 in Annals, 29 in EMJ, and 18 in EMA . A clear aim was reported in 93% of articles, standardized abstraction forms were reported in 51%, interrater reliability was reported in 25%, ethics approval or waiver was reported in 68%, and sample size or power calculation was reported in 10%.

CONCLUSION

Adherence to the quality criteria for medical record reviews was suboptimal, and there were significant differences among journals in overall methodologic quality.

Evidence for muon neutrino oscillation in an accelerator-based experiment

We present results for nu(mu) oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced nu(mu) beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy-dependent disappearance of nu(mu), which we presume have oscillated to nu(tau). The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma).

Implementation of the Canadian C-spine rule reduces cervical spine x-ray rate for alert patients with potential neck injury

The objectives of this before-and-after study of alert, stable adult patients presenting to the Emergency Department of Western Hospital with potential neck injuries who were immobilized in hard cervical collars were to determine the impact of implementation of the Canadian C-spine rule on x-ray ordering rates and whether implementation of the rule reduced time in hard collars for patients with potential neck injury. Data collected included demographics, mechanism of injury, x-ray rate, and time in hard collar. Data analysis was by chi-square test for proportions and Mann-Whitney U test for continuous variables. There were 211 patients studied. The x-ray ordering rate decreased from 67% to 50% (25% relative reduction, p = 0.0187). Time in hard collar was also reduced from a median of 128 min to a median of 103 min (effect size 25.5 min), but this did not reach statistical significance. Implementation of the Canadian C-spine rule reduced x-ray ordering by 25%.

Randomised trial of intranasal versus intramuscular naloxone in prehospital treatment for suspected opioid overdose

OBJECTIVE

To determine the effectiveness of intranasal (IN) naloxone compared with intramuscular (IM) naloxone for treatment of respiratory depression due to suspected opiate overdose in the prehospital setting.

DESIGN

Prospective, randomised, unblinded trial of either 2 mg naloxone injected intramuscularly or 2 mg naloxone delivered intranasally with a mucosal atomiser.

PARTICIPANTS AND SETTING

155 patients (71 IM and 84 IN) requiring treatment for suspected opiate overdose and attended by paramedics of the Metropolitan Ambulance Service (MAS) and Rural Ambulance Victoria (RAV) in Victoria.

MAIN OUTCOME MEASURES

Response time to regain a respiratory rate greater than 10 per minute. Secondary outcome measures were proportion of patients with respiratory rate greater than 10 per minute at 8 minutes and/or a GCS score over 11 at 8 minutes; proportion requiring rescue naloxone; rate of adverse events; proportion of the IN group for whom IN naloxone alone was sufficient treatment.

RESULTS

The IM group had more rapid response than the IN group, and were more likely to have more than 10 spontaneous respirations per minute within 8 minutes (82% v 63%; P = 0.0173). There was no statistically significant difference between the IM and IN groups for needing rescue naloxone (13% [IM group] v 26% [IN group]; P = 0.0558). There were no major adverse events. For patients treated with IN naloxone, this was sufficient to reverse opiate toxicity in 74%.

CONCLUSION

IN naloxone is effective in treating opiate-induced respiratory depression, but is not as effective as IM naloxone. IN delivery of naxolone could reduce the risk of needlestick injury to ambulance officers and, being relatively safe to make more widely available, could increase access to life-saving treatment in the community.

Clinical features in the emergency department can identify patients with suspected acute coronary syndromes who are safe for care in unmonitored hospital beds

BACKGROUND

Standard practice for patients requiring hospital admission with suspected acute coronary syndromes (ACS) is admission to a monitored cardiology bed. The Western Hospital Chest Pain Protocol was developed to identify a subset of these patients who could be safely managed in an unmonitored bed.

AIM

The objective of this prospective study of chest pain patients classified as 'high' or 'intermediate' risk by the Agency for Health Care Policy and Research/National Health and Medical Research Council guidelines was to further evaluate the safety of this protocol.

METHODS

This study was a prospective, observational, cohort study investigating the outcomes of patients admitted to hospital with suspected ACS. The primary outcome of interest was death or life-threatening arrhythmia within 24 h of hospital admission.

RESULTS

If the Western Hospital Chest Pain Protocol had been strictly applied, there would have been one death in the group assigned to unmonitored beds (1/750; 0.13%, 95% confidence interval 0.01-0.85%) and no other life-threatening arrhythmias.

CONCLUSION

There is a subgroup of patients with suspected ACS who require hospital admission who can, based on clinical and biochemical features in the emergency department, be safely assigned to unmonitored beds.

Is severity assessment after one hour of treatment better for predicting the need for admission in acute asthma?

AIM

To determine if severity assessment after 1 h of treatment is better than assessment at presentation for predicting the requirement for hospital admission for emergency department (ED) patients with acute asthma.

METHODS

Prospective, observational study conducted in 36 Australian ED for a 2-week period in 2001 involving patients aged 1-55 years presenting with asthma. Data collected included severity assessment according to the National Asthma Guidelines (Australia) at presentation and 1 h, and disposition. Descriptive analysis was applied.

RESULTS

720 cases were analysed. Patients with 'mild' asthma at either assessment time had a greater than 80% chance of discharge home. Patients assessed as 'severe' at either assessment had a greater than 85% chance of requiring hospital admission, but the 1 h assessment was better at predicting the need for Intensive Care Unit (ICU) admission. For the 'moderate' group, the initial assessment was a poor predictor of the need for admission however those who met the criteria for 'moderate' severity at 1 h had an 84% chance of requiring admission.

CONCLUSION

Assessment of asthma severity after 1 h of treatment is better than initial severity assessment for determining the need for hospital admission for patients initially assessed as having 'moderate' asthma and for predicting the need for ICU in patients initially assessed as 'severe'.