Amine Ali Zeggwagh

Evolution of Mortality over Time in Patients Receiving Mechanical Ventilation

RATIONALE Baseline characteristics and management have changed over time in patients requiring mechanical ventilation; however, the impact of these changes on patient outcomes is unclear. OBJECTIVES To estimate whether mortality in mechanically ventilated patients has changed over time. METHODS Prospective cohort studies conducted in 1998, 2004, and 2010, including patients receiving mechanical ventilation for more than 12 hours in a 1-month period, from 927 units in 40 countries. To examine effects over time on mortality in intensive care units, we performed generalized estimating equation models. MEASUREMENTS AND MAIN RESULTS We included 18,302 patients. The reasons for initiating mechanical ventilation varied significantly among cohorts. Ventilatory management changed over time (P < 0.001), with increased use of noninvasive positive-pressure ventilation (5% in 1998 to 14% in 2010), a decrease in tidal volume (mean 8.8 ml/kg actual body weight [SD = 2.1] in 1998 to 6.9 ml/kg [SD = 1.9] in 2010), and an increase in applied positive end-expiratory pressure (mean 4.2 cm H2O [SD = 3.8] in 1998 to 7.0 cm of H2O [SD = 3.0] in 2010). Crude mortality in the intensive care unit decreased in 2010 compared with 1998 (28 versus 31%; odds ratio, 0.87; 95% confidence interval, 0.80-0.94), despite a similar complication rate. Hospital mortality decreased similarly. After adjusting for baseline and management variables, this difference remained significant (odds ratio, 0.78; 95% confidence interval, 0.67-0.92). CONCLUSIONS Patient characteristics and ventilation practices have changed over time, and outcomes of mechanically ventilated patients have improved. Clinical trials registered with www.clinicaltrials.gov (NCT01093482).

Validation of a behavioral pain scale in critically ill, sedated, and mechanically ventilated patients.

Assessing pain in critically ill patients, particularly in nonverbal patients, is a great challenge. In this study, we validated a behavioral pain scale (BPS) in critically ill, sedated, and mechanically ventilated patients. The BPS score was the sum of 3 subscales that have a range score of 1–4: facial expression, upper limb movements, and compliance with mechanical ventilation. Two assessors observed and scored pain simultaneously with the BPS at rest and during painful procedures. The psychometric properties of the BPS that were studied were reliability, validity, and responsiveness. We achieved 360 observations in 30 patients. The BPS was internally reliable (Cronbach &agr; = 0.72). The intraclass correlation coefficient to evaluate inter-rater reliability was high (0.95). Validity was demonstrated by the change in BPS scores, which were significantly higher during painful procedures, with averages of 3.9 ± 1.1 at rest and 6.8 ± 1.9 during procedures (P < 0.001), and by the principal components factor analysis, which revealed a large first-factor accounting for 65% of the variance in pain expression. The BPS exhibited excellent responsiveness, with an effect size ranging from 2.2 to 3.4. This study demonstrated that the BPS can be valid and reliable for measuring pain in noncommunicative intensive care unit patients.

Eosinopenia is a reliable marker of sepsis on admission to medical intensive care units

IntroductionEosinopenia is a cheap and forgotten marker of acute infection that has not been evaluated previously in intensive care units (ICUs). The aim of the present study was to test the value of eosinopenia in the diagnosis of sepsis in patients admitted to ICUs.MethodsA prospective study of consecutive adult patients admitted to a 12-bed medical ICU was performed. Eosinophils were measured at ICU admission. Two intensivists blinded to the eosinophils classified patients as negative or with systemic inflammatory response syndrome (SIRS), sepsis, severe sepsis, or septic shock.ResultsA total of 177 patients were enrolled. In discriminating noninfected (negative + SIRS) and infected (sepsis + severe sepsis + septic shock) groups, the area under the receiver operating characteristic curve was 0.89 (95% confidence interval (CI), 0.83 to 0.94). Eosinophils at <50 cells/mm3 yielded a sensitivity of 80% (95% CI, 71% to 86%), a specificity of 91% (95% CI, 79% to 96%), a positive likelihood ratio of 9.12 (95% CI, 3.9 to 21), and a negative likelihood ratio of 0.21(95% CI, 0.15 to 0.31). In discriminating SIRS and infected groups, the area under the receiver operating characteristic curve was 0.84 (95% CI, 0.74 to 0.94). Eosinophils at <40 cells/mm3 yielded a sensitivity of 80% (95% CI, 71% to 86%), a specificity of 80% (95% CI, 55% to 93%), a positive likelihood ratio of 4 (95% CI, 1.65 to 9.65), and a negative likelihood ratio of 0.25 (95% CI, 0.17 to 0.36).ConclusionEosinopenia is a good diagnostic marker in distinguishing between noninfection and infection, but is a moderate marker in discriminating between SIRS and infection in newly admitted critically ill patients. Eosinopenia may become a helpful clinical tool in ICU practices.

Incidence, étiologies et facteurs pronostiques de l'hyponatrémie en réanimation

Purpose. – The incidence of hyponatremia is unknown, their causes are multiple. The higher mortality, especially in intensive care units, is currently unexplained. The objective of this article is to evaluate the incidence of hyponatremia, to assess their causes and to identify predictors of prognosis in intensive care units. Methods. – We included retrospectively all patients admitted at department of medical intensive care unit between January 1996 and February 2001, who presented at the admission, an hyponatremia ( 13 mmol/l or with mannitol administration. Data were analysed by univariate methods, then by multivariate analysis. Results. – During the study period, 300 patients were identified among 2188: the incidence was 13.7% with 95% confidence interval (95% CI) between 9.8 % and 16.7%. Hypovolemic hyponatremia was observed in 25.7%, hypervolemic in 23.7% and normovolemic in 50.6%. In-hospital mortality was 37.7% (95% CI: 31.8% – 42.3%). Nine data were significantly associated with higher mortality in univariate analysis, but only 5 were identified as independant predictors of hospital mortality in multivariate analysis: hyponatremia 10 mmol/l (RR = 1.59; 95% CI : 1.08–2.34; p = 0.02). Conclusion. – The frequency of hyponatremia is high ; the normovolemic type represented 50%. Mortality is linked, in greater part, to organs dysfunction, but the severity of hyponatremia remained a significant predictor of mortality.

Reversible myocardial injury associated with aluminum phosphide poisoning

Background. Aluminum phosphide poisoning has high mortality resulting from cardiac impairment and hemodynamic disorders. We report two cases of aluminum phosphide associated with reversible myocardial injury. Cases Reports. A 19-year-old woman and a 28-year-old man were admitted to hospital following ingestion of aluminum phosphide. The clinical course was characterized by the development of a shock syndrome requiring the use of vasoactive amines in the woman. However, the arterial hypotension in the man was improved by fluid filling and vasoactive drugs. The myocardial injury was objectively documented in both cases. The electrocardiogram showed ST-segment elevations and diffusely abnormal repolarization. The plasma concentrations of cardiac enzymes were elevated. In the second case, echocardiography showed similar myocardial involvement with left ventricular hypokinesis (left ventricle ejection fraction 30%). In both cases, there was progressive improvement in hemodynamic status, cardiac traces, and biochemical values. A simultaneous improvement was observed in echocardiogram of the second case (left ventricle ejection fraction increased to 50%). Conclusion. Reversible myocardial injury following aluminum phosphide poisoning has been described in few cases. We objectively documented progressive clinical and electrical improvement in two cases.

Weaning from mechanical ventilation: a model for extubation

Objective: To develop a model able to determine the right time for extubation and to validate its performance.¶Design: A prospective clinical study.¶Setting: 14-bed medical intensive care unit in a university hospital.¶Patients: 101 patients (37 women/64 men) ventilated over more than 48 h (mean 10.4 ± 10.3 days) and considered ready to be weaned by the medical team (February 1996–February 1998).¶Methods: This study included two series: a development series with 53 patients and a validation series with 48 patients. Before extubation, a weaning test was performed measuring tidal volume (VT), respiratory rate (f), f/VT ratio, minute ventilation, vital capacity (VC) and maximum inspiratory and expiratory pressures (MIP and MEP). The success of extubation was assessed after 48 h. Receiver operating characteristic (ROC) curves allowed the analysis of the discriminating power of each parameter. Threshold values were determined using the Youdens index. To create the best predictive model, we performed a multiple logistic regression analysis. To assess the calibration and the discrimination of the model, the Hosmer-¶Lemeshow goodness-of-fit test and area under ROC curves (AUC) were adopted.¶Measurements and results: In a development series, 60 tests were carried out with 38 successful extubations and 22 extubation failures. The multivariate analysis found three significant variables: VC (threshold value = 635 ml), f/VT ratio (threshold value = 88 breaths/min.l) and MEP (threshold value = 28 cmH2O). The validation cohort included 59 tests (38 successes and 21 failures). The validation series shows a good discrimination (AUC = 0.855 ± 0.059) and calibration (goodness-of-fit test C: p = 0.224) of the model.¶Conclusion: VC together with the ¶f/VT ratio and MEP offer accurate prediction of early extubation.

Measuring the satisfaction of intensive care unit patient families in Morocco: a regression tree analysis.

Objective:Meeting the needs of patients’ family members becomes an essential part of responsibilities of intensive care unit physicians. The aim of this study was to evaluate the satisfaction of patients’ family members using the Arabic version of the Society of Critical Care Medicine’s Family Needs Assessment questionnaire and to assess the predictors of family satisfaction using the classification and regression tree method. Design:The authors conducted a prospective study. Setting:This study was conducted at a 12-bed medical intensive care unit in Morocco. Patients:Family representatives (n = 194) of consecutive patients with a length of stay >48 hrs were included in the study. Intervention:Intervention was the Society of Critical Care Medicine’s Family Needs Assessment questionnaire. Measurements and Main Results:Demographic data for relatives included age, gender, relationship with patients, education level, and intensive care unit commuting time. Clinical data for patients included age, gender, diagnoses, intensive care unit length of stay, Acute Physiology and Chronic Health Evaluation, MacCabe index, Therapeutic Interventioning Scoring System, and mechanical ventilation. The Arabic version of the Society of Critical Care Medicine’s Family Needs Assessment questionnaire was administered between the third and fifth days after admission. Of family representatives, 81% declared being satisfied with information provided by physicians, 27% would like more information about the diagnosis, 30% about prognosis, and 45% about treatment. In univariate analysis, family satisfaction (small Society of Critical Care Medicine’s Family Needs Assessment questionnaire score) increased with a lower family education level (p = .005), when the information was given by a senior physician (p = .014), and when the Society of Critical Care Medicine’s Family Needs Assessment questionnaire was administered by an investigator (p = .002). Multivariate analysis (classification and regression tree) showed that the education level was the predominant factor contributing to the Society of Critical Care Medicine’s Family Needs Assessment questionnaire score. Society of Critical Care Medicine’s Family Needs Assessment questionnaire increased (greater satisfaction) with a higher education level. Other factors of great satisfaction included the senior physician providing the information, and Acute Physiology and Chronic Health Evaluation <15. Conclusions:Satisfaction of intensive care unit patients’ families in a Moroccan sample using the classification and regression tree was dependent on relatives’ education level, communication presented by senior caregiver, and low Acute Physiology and Chronic Health Evaluation score. These data underline cultural specificities of the study and suggest that caregivers should develop structured communication programs considering satisfaction predictors.

Withholding and withdrawing life-sustaining therapy in a Moroccan Emergency Department: An observational study

BackgroundWithdrawing and withholding life-support therapy (WH/WD) are undeniably integrated parts of medical activity. However, Emergency Department (ED) might not be the most appropriate place to give end-of life (EOL) care; the legal aspects and practices of the EOL care in emergency rooms are rarely mentioned in the medical literature and should be studied. The aims of this study were to assess frequency of situations where life-support therapies were withheld or withdrawn and modalities for implement of these decisions.MethodA survey of patients who died in a Moroccan ED was performed. Confounding variables examined were: Age, gender, chronic underlying diseases, acute medical disorders, APACHE II score, Charlson Comorbidities Index, and Length of stay. If a decision of WH/WD was taken, additional data were collected: Type of decision; reasons supporting the decision, modalities of WH/WD, moment, time from ED admission to decision, and time from processing to withhold or withdrawal life-sustaining treatment to death. Individuals who initiated (single emergency physician, medical staff), and were involved in the decision (nursing staff, patients, and families), and documentation of the decision in the medical record.Results177 patients who died in ED between November 2009 and March 2010 were included. Withholding and withdrawing life-sustaining treatment was applied to 30.5% of all patients who died. Therapies were withheld in 24.2% and were withdrawn in 6.2%. The most reasons for making these decisions were; absence of improvement following a period of active treatment (61.1%), and expected irreversibility of acute disorder in the first 24 h (42.6%). The most common modalities withheld or withdrawn life-support therapy were mechanical ventilation (17%), vasopressor and inotrops infusion (15.8%). Factors associated with WH/WD decisions were older age (OR = 1.1; 95%IC = 1.01-1.07; P = 0.001), neurological acute medical disorders (OR = 4.1; 95%IC = 1.48-11.68; P = 0.007), malignancy (OR = 7.7; 95%IC = 1.38-8.54; P = 0.002) and cardiovascular (OR = 3.4;95%IC = 2.06-28.5;P = 0.008) chronic underlying diseases.ConclusionLife-sustaining treatment were frequently withheld or withdrawn from elderly patients with underlying chronic cardiovascular disease or metastatic cancer or patients with acute neurological medical disorders in a Moroccan ED. Religious beliefs and the lack of guidelines and official Moroccan laws could explain the ethical limitations of the decision-making process recorded in this study.

Thrombus ventriculaire gauche et myocardite toxique induite par la paraphénylène diamine

Resume Il a ete montre chez l’homme que l’intoxication par la paraphenylene diamine (PPD) etait responsable d’une myocardite, mais sa description echographique n’a jamais ete rapportee. Le but de cette observation a ete de decrire les anomalies observees a l’echocardiographie lors d’une myocardite compliquant une intoxication par la PPD. Suite a une ingestion volontaire de 5 g de PPD, une jeune femme de 18 ans a ete admise a l’hopital avec un syndrome asphyxique et une rhabdomyolyse. L’electrocardiogramme a revele des extrasystoles ventriculaires et des ondes T negatives. La concentration sanguine de la CK etait de 28 020 UI l –1 et celle de l’iso-enzyme MB de 840 UI l –1 . L’echocardiographie transthoracique a revele une hypokinesie des 2 ventricules (fraction de raccourcissement = 20 %, fraction d’ejection = 35 %). Le ventricule gauche a ete le siege d’un thrombus comblant l’apex. Un traitement anticoagulant par heparine standard a ete administre. A j15, l’echocardiographie de controle a revele une normalisation de la fonction ventriculaire avec disparition du thrombus. Aucune complication embolique n’a ete notee. Dans la myocardite toxique due a la PPD, l’echocardiographie est un examen de choix qui permet d’evaluer la fonction ventriculaire et de rechercher la presence de thrombus intracardiaque.

Patient satisfaction in a Moroccan emergency department

Background Measuring healthcare quality and improving patient satisfaction have become increasingly prevalent, especially among healthcare providers and purchasers of healthcare. Currently, research is interested to the satisfaction in several areas, and in various cultures. The aim of this study was; to confirm the reliability and validity of the Arabic version of the Emergency Department Quality Study (EDQS), to evaluate patient satisfaction with emergency care, and to determine associated factors with patient satisfaction. Methods A survey of socio demographic, visit and health characteristics of patients, conducted in emergency department (ED) of a Moroccan University Hospital during 1 week in February 2009. The EDQS was performed with patients who were discharged from ED. The psychometric properties of the EDQS were tested. Factors influencing patient satisfaction were identified using ordinal logistic regression. Results A total of 212 patients were enrolled. The Arabic version of the EDQS showed excellent reliability and validity. Sixty six percent of participants were satisfied with overall care, and 69.8% would return to our unit. The most patient-reported problems were about waiting time and test results. Variables associated with greater satisfaction with ED care were: emergent (OR: 0.15; 95% CI = 0.04-0.31; P < 0.001), or urgent patients (OR: 0.35; 95% CI = 0.15-0.86; P = 0.02) compared to non-urgent patients, and waiting time less than 15 min (OR: 0.41; 95% CI = 0.23-0.75; P = 0.003). Variables associated with lesser satisfaction were: distance patient’s home hospital ≤10Kilometers (OR: 2.64; 95% CI = 1.53-4.53; P < 0.001), weekday’s admissions (OR: 2.66; 95% CI = 1.32 to 5.34; P < 0.006), and educational level; with secondary (OR: 5.19; 95% CI = 2.04-13.21; P < 0.001) primary (OR: 3.04; 95% CI = 1.10-8.04; P = 0.03) and illiterate patients (OR: 2.53; 95% CI = 1.02-6.30; P = 0.03) were less satisfied compared to those with high educational level. Conclusion Medical staff needs to consider different interactions between those predictive factors in order to develop some supportive tools.