Lead is an old environmental metal which is presented everywhere and lead poisoning is an important health issue in many countries in the world including Iran. It is known as a silent environmental disease which can have life-long adverse health effects. In children, the most vulnerable population, mental development of children health effects is of the greatest influence. Low level lead exposure can significantly induce motor dysfunctions and cognitive impairment in children. The sources of lead exposure vary among countries. Occupational lead exposure is an important health issue in Iran and mine workers, employees of paint factories, workers of copying centers, drivers, and tile making factories are in higher risk of lead toxicity. Moreover lead processing industry has always been a major of concern which affects surface water, drinking waters, and ground waters, even water of Caspian Sea, Persian Gulf and rivers due to increasing the number of industries in vicinity of rivers that release their waste discharges into river or sea. In addition, lead contamination of soil and air especially in vicinity of polluted and industrialized cities is another health problem in Iran. Even foods such as rice and fishes, raw milk, and vegetables which are the most common food of Iranian population are polluted to lead in some area of Iran. Adding lead to the opium is a recently health hazard in Iran that has been observed among opium addicts. There are few studies evaluated current status of lead exposure and toxicity in the Iranian children and pregnant women which should be taken into account of authorities. We recommend to identify sources, eliminate or control sources, and monitor environmental exposures and hazards to prevent lead poisoning.

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A systematic review on status of lead pollution and toxicity in Iran; Guidance for preventive measures.

Objective
To provide evidence-based treatment recommendations for adults with acute migraine who require treatment with injectable medication in an emergency department (ED). We addressed two clinically relevant questions: (1) Which injectable medications should be considered first-line treatment for adults who present to an ED with acute migraine? (2) Do parenteral corticosteroids prevent recurrence of migraine in adults discharged from an ED?

Methods
The American Headache Society convened an expert panel of authors who defined a search strategy and then performed a search of Medline, Embase, the Cochrane database and clinical trial registries from inception through 2015. Identified articles were rated using the American Academy of Neurology's risk of bias tool. For each medication, the expert panel determined likelihood of efficacy. Recommendations were created accounting for efficacy, adverse events, availability of alternate therapies, and principles of medication action.

Results/Conclusions
The search identified 68 unique randomized controlled trials utilizing 28 injectable medications. Of these, 19 were rated class 1 (low risk of bias), 21 were rated class 2 (higher risk of bias), and 28 were rated class 3 (highest risk of bias). Metoclopramide, prochlorperazine, and sumatriptan each had multiple class 1 studies supporting acute efficacy, as did dexamethasone for prevention of headache recurrence. All other medications had lower levels of evidence.

Recommendations
Intravenous metoclopramide and prochlorperazine, and subcutaneous sumatriptan should be offered to eligible adults who present to an ED with acute migraine (Should offer—Level B). Dexamethasone should be offered to these patients to prevent recurrence of headache (Should offer—Level B). Because of lack of evidence demonstrating efficacy and concern about sub-acute or long-term sequelae, injectable morphine and hydromorphone are best avoided as first-line therapy (May avoid–Level C).

Management of Adults With Acute Migraine in the Emergency Department: The American Headache Society Evidence Assessment of Parenteral Pharmacotherapies

Ultrasound for diagnostic and procedural purposes is becoming a standard in daily clinical practice including anaesthesiology and peri-operative medicine. The project of European Society of Anaesthesiology (ESA) Task Force for the development of clinical guidelines on the PERioperative uSE of Ultra-Sound (PERSEUS) project has focused on the use of ultrasound in two areas that account for the majority of procedures performed routinely in the operating room: vascular access and regional anaesthesia. Given the extensive literature available in these two areas, this paper will focus on the use of ultrasound-guidance for vascular access. A second part will be dedicated to peripheral nerve/neuraxial blocks. The Taskforce identified three main domains of application in ultrasound-guided vascular cannulation: adults, children and training. The literature search were performed by a professional librarian from the Cochrane Anaesthesia and Critical and Emergency Care Group in collaboration with the ESA Taskforce. The Grading of Recommendation Assessment (GRADE) system for assessing levels of evidence and grade of recommendations were used. For the use of ultrasound-guided cannulation of the internal jugular vein, femoral vein and arterial access, the level evidence was classified 1B. For other accesses, the evidence remains limited. For training in ultrasound guidance, there were no studies. The importance of proper training for achieving competency and full proficiency before performing any ultrasound-guided vascular procedure must be emphasised.

European Society of Anaesthesiology guidelines on peri-operative use of ultrasound-guided for vascular access (PERSEUS vascular access)

What is burn-out? You can get a lot of opinions, including the view (perhaps a semantic argument in some instances) that there is no such thing. In the terms of this book, it is often a condition in which likely-to-succeed persons begin "exhibiting signs of something amiss between themselves and their environment." Clinical psychologist Freudenberger says he has experienced it himself; that what is happening is not just something inside the persons affected. No, suggest the authors, "much had to be attributed to the times we live in, the swift acceleration of change, the depersonalization of neighborhoods, schools, and work situations." In any case, whatever burn-out is or is not, it is a much-discussed subject these days, and physicians may want to examine as many viewpoints as possible. This book, of course, offers one of them.

Burn-Out: The High Cost of High Achievement

The aim of this study is to provide a systematic review of the literature reporting agreement between arterial and venous pH, partial pressure of carbon dioxide (PCO2), bicarbonate (HCO3⁻), base excess and lactate; and to perform a meta-analysis of the differences. Medline and Embase searches using Eduserv Athens from 1950 to present were conducted using the terms 'VBG', 'ABG', 'arterial', 'venous', 'blood', 'gas', 'lactate', 'emergency' and 'department'. References of the published papers were hand searched and full-text versions of those deemed helpful to the question were obtained. Mean difference (MD) and 95% limits of agreement (LOA) were either reported or calculated from the published data. Pooled MDs with 95% confidence intervals (CIs) were calculated for differences between arterial and venous pH, PCO2, bicarbonate and lactate. Thirteen articles relevant to pH, 12 relevant to PCO2, 10 relevant to bicarbonate and three relevant to lactate were found. The pooled MD (venous-arterial) for pH was -0.033 pH units (95% CI -0.039 to 0.027) with narrow 95% LOA, the pooled MD for PCO2 was 4.41 mmHg (95% CI 2.55-6.27) with 95% LOA ranging from -20.4 to 25.8 mmHg, the pooled MD for bicarbonate was 1.03 mmol/l (95% CI 0.56-1.50) with 95% LOA ranging from -7.1 to 10.0 mmol/l and the pooled MD for lactate was 0.25 mmol/l (95% CI 0.15-0.35) with 95% LOA ranging from -2.0 to 2.3 mmol/l. Venous and arterial pH and bicarbonate agree reasonably at all values, but the agreement is highest at normal values. Arteriovenous agreement for PCO2 is poor and PvCO2 cannot be relied upon as an absolute representation of PaCO2. However, normal peripheral PvCO2 has a good negative predictive value for normal arterial PCO2, and a normal PvCO2 can be used as a screen to exclude hypercapnic respiratory disease. There may be a poor agreement between arterial and venous lactate at abnormal values; however, if the venous lactate is normal, it is likely the arterial values of this parameter will also be normal.

The role of venous blood gas in the Emergency Department: a systematic review and meta-analysis

A 32-year-old man presented to the emergency department (ED) with lower abdominal pain and constipation. He related chronic ingestion of large amounts of opium. Physical examination showed mild abdominal tenderness and gingival discoloration. Diagnostic studies showed a mild hypochromic, microcytic anemia with basophilic stippling of the red blood cells. Abdominal imaging showed no intra-abdominal pathology. A diagnosis of lead toxicity was confirmed through serum lead levels. The patient was put on chelation therapy and his signs and symptoms started to resolve. As a comprehensive search for other sources of lead was unsuccessful, opium adulterants were considered as the culprit. Chemical analysis of the opium confirmed this. Contaminated drugs have been reported as a source of exposure to toxins such as arsenic or lead. While other reports deal with patients from clinics, this report illustrates lead toxicity from ingestion of contaminated opium in the ED.

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Lead Toxicity Resulting from Chronic Ingestion of Opium

Background: This study was conducted to determine the effect of nurses' workplace on burnout syndrome among nurses working in Isfahan's Alzahra Hospital as a reference and typical university affiliated hospital, in 2010. Materials and Methods: In this cross-sectional study, 100 nurses were randomly selected among those working in emergency, orthopedic, dialysis wards and intensive care unit (ICU). Required data on determination of occupational burnout rate among the nurses of these wards were collected using Maslach Burnout Inventory (MBI) standard and validated questionnaire. Nurses were selected using simple random sampling. Results: The multivariate ANOVA analysis showed that occupational burnout mean values of nurses working in orthopedic and dialysis wards were significantly less than those of nurses working in emergency ward and ICU (P0 = 0.01). There was also no significant difference between occupational burnout mean values of nurses working in emergency ward and ICU ( P > 0.05). t-test showed that there was a difference between occupational burnout values of men and women, as these values for women were higher than those of men (P = 0.001). Conclusion: Results showed that occupational burnout mean values of nurses working in emergency ward and ICU were significantly more than those of nurses working in orthopedic and dialysis wards.

Correlation between workplace and occupational burnout syndrome in nurses

BACKGROUND: There are different options to manage benign headache in the emergency department. The costs, side effects, and efficacies of the drugs used are significantly different. The aim of this study was to compare intravenous (IV) metoclopramide with subcutaneous (SC) sumatriptan in treatment of migraine headache. MATERIAL AND METHODS: In a randomized, double-blinded clinical trial study, patients presenting to the university referral emergency department with acute benign headache were allocated into two groups after obtaining their informed consent. Patients received 20 mg of IV metoclopramide or 6 mg of SC sumatriptan. Pain intensity was assessed with 10-cm visual analog scale at baseline and 60 min after treatment. RESULTS: One hundred and twenty-four subjects participated. The mean age was 34.9 ± 9 years in metoclopramide group and 26.8 ± 4 years in sumatriptan group (P < 0.0001). The baseline pain scores were 6.47 ± 0.84 and 6.12 ± 0.73 in metoclopramide and sumatriptan groups, respectively (P < 0.0001). The mean of pain score decreased to 0.66 ± 0.59 cm (P < 0.0001) in the metoclopramide group and 1.1 ± 0.70 (P < 0.0001) in the sumatriptan group. Comparison of these two groups showed more pain reduction in the metoclopramide group, with a mean difference of 0.55 ± 0.13 between the groups (95% CI: 0.25-0.79 cm) (P < 0.0001). CONCLUSION: For treatment of migraine headache, IV metoclopramide may be superior to SC sumatriptan in the emergency department.

Metoclopramide versus sumatriptan for treatment of migraine headache: A randomized clinical trial.

Background:
Kidney stone is normally treated by opioids with a variety of side-effects including hypotension, respiratory depression and apnea, nausea and vomiting. Regarding less complications of intravenous acetaminophen, we aimed to compare it with intravenous morphine in management of renal colic pain.

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Comparing the analgesic effect of intravenous acetaminophen and morphine on patients with renal colic pain referring to the emergency department: A randomized controlled trial.

BACKGROUND: Analysis of venous blood gas (VBG) can represent arterial blood gas (ABG) analysis in patients with various diseases. The effects of hypotension on dif ferences between the results of simultaneous venous and arterial blood gas analyses were reviewed. METHODS: This observational, cross-sectional study was condu cted from March to October 2010 in emergency departments of two university hospitals in Tehran (Iran) on consecutive adult patients for whom ABG had been indicated for diagnosis/treatment. Arterial and peripheral venous bloods were simultaneously sampled with blood pressure measurement. The VBG-ABG amount of difference regarding pH, HCO3, PCO2, PO2, SO2, and Base Excess (BE) was compared between those with and without hypotension. RESULTS: During the study, 192 patients (51.6 ± 23.6 years, 67.7% males) were entered into the hypotension (n = 78) and normotensive groups (n = 114). The average VBG-ABG amount of difference (95% limits of agreement) in the hypotension versus normotensive group were -0.030 (-0.09 to 0.03) vs. -0.016 (-0.1 to 0.068) for pH (p = 0.01), 1.79 (-1.91 to 5.49) vs. 1.32 (-1.94 to 4.58) mEq/L for HCO3 (p = 0.032), 2.69 (-20.43 to 25.81) vs. 2.03 (-7.7 5 to 11.81) mmHg for PCO2 (p = 0.295), -35.97 (-130.17 to 58.23) vs. -32.65 (-104.79 to 39.49) mmHg for PO2 (p = 0.293), -18.58 (-14.66 to 51.82) vs. -9.06 (-31.28 to 13.16 ) percent (p < 0.001) for SO 2, and 0.25 (-3.73 to 4.23) vs. 0.79 (-2.51 to 4.09) for BE (p = 0.036). CONCLUSIONS: Hypotensive status is associated with an increase i n the amount of difference between VBG and ABG analysis regarding pH, HCO3, and BE, though the amount of increase does not se em to be clinically important. Studying the precise effects of replacing ABG with VBG on the clinical decision-making and the following outcom es is worthwhile.

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Reza Azizkhani

Papers

Lead Toxicity Resulting from Chronic Ingestion of Opium

Correlation between workplace and occupational burnout syndrome in nurses

Metoclopramide versus sumatriptan for treatment of migraine headache: A randomized clinical trial.

Comparing the analgesic effect of intravenous acetaminophen and morphine on patients with renal colic pain referring to the emergency department: A randomized controlled trial.

The effects of hypotension on differences between the results of simultaneous venous and arterial blood gas analysis.