Anil Sachdev

Diagnosis of ventilator-associated pneumonia in children in resource-limited setting: a comparative study of bronchoscopic and nonbronchoscopic methods.

Objectives: To compare the available methods for the diagnosis of ventilator-associated pneumonia in intubated pediatric patients and to suggest less costly diagnostic method for developing countries. Design: Prospective study. Setting: Pediatric intensive care unit of a tertiary care, multidisciplinary teaching hospital located in northern India. Patients: All consecutive patients on mechanical ventilation for >48 hrs were evaluated clinically for ventilator-associated pneumonia. Interventions: Four diagnostic procedures (tracheal aspiration, blind bronchial sampling, blind bronchoalveolar lavage, and bronchoscopic bronchoalveolar lavage) were performed in the same sequence within 12 hrs of clinical suspicion of ventilator-associated pneumonia. The bacterial density ≥104 colony-forming units/mL in a bronchoscopic bronchoalveolar lavage sample was taken as reference standard. Measurements and Main Results: Thirty patients with 40 episodes of ventilator-associated pneumonia were included in the study. Tracheal aspirate at the cutoff of ≥105 colony-forming units/mL was found to have sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of 84%, 77%, 87.5%, 73%, and 80%, respectively. For blind bronchial sampling at ≥104 colony-forming units/mL cutoff, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 88%, 82%, 88%, 83%, and 87%, respectively; the most reliable results were obtained with blind bronchoalveolar lavage at the cutoff of ≥103 cfu/mL (sensitivity 96%, specificity 80%, positive predictive value 88%, negative predictive value 92%, and accuracy 90%). The area under the receiver operating characteristic curve of tracheal aspiration, blind bronchial sampling, and blind bronchoalveolar lavage was 0.87 ± 0.06, 0.89 ± 0.06, and 0.89 ± 0.05, respectively. The cost of balloon-tip pressure catheter used for blind bronchoalveolar lavage was INR 1600.00 (US

Pediatric Sepsis Guidelines: summary for resource-limited countries

40) whereas that for blind bronchial sampling was only INR 35.00 (<1 US

Platelet counts and outcome in the pediatric intensive care unit

). Conclusions: Blind bronchoalveolar lavage was the most reliable method followed closely by blind bronchial sampling for the diagnosis of ventilator-associated pneumonia. Considering the difference of the cost in the two procedures, blind bronchial sampling may be the preferred method in the pediatric intensive care unit of a developing country.

Diagnosis of bacterial ventilator-associated pneumonia in children: reproducibility of blind bronchial sampling.

Justification: Pediatric sepsis is a commonly encountered global issue. Existing guidelines for sepsis seem to be applicable to the developed countries, and only few articles are published regarding application of these guidelines in the developing countries, especially in resource-limited countries such as India and Africa. Process: An expert representative panel drawn from all over India, under aegis of Intensive Care Chapter of Indian Academy of Pediatrics (IAP) met to discuss and draw guidelines for clinical practice and feasibility of delivery of care in the early hours in pediatric patient with sepsis, keeping in view unique patient population and limited availability of equipment and resources. Discussion included issues such as sepsis definitions, rapid cardiopulmonary assessment, feasibility of early aggressive fluid therapy, inotropic support, corticosteriod therapy, early endotracheal intubation and use of positive end expiratory pressure/mechanical ventilation, initial empirical antibiotic therapy, glycemic control, and role of immunoglobulin, blood, and blood products. Objective: To achieve a reasonable evidence-based consensus on the basis of published literature and expert opinion to formulating clinical practice guidelines applicable to resource-limited countries such as India. Recommendations: Pediatric sepsis guidelines are presented in text and flow chart format keeping resource limitations in mind for countries such as India and Africa. Levels of evidence are indicated wherever applicable. It is anticipated that once the guidelines are used and outcomes data evaluated, further modifications will be necessary. It is planned to periodically review and revise these guidelines every 3–5 years as new body of evidence accumulates.

Guidelines for treatment of septic shock in resource limited environments.

Objectives: Thrombocytopenia is commonly observed in critically ill patients. This study was undertaken to evaluate the variation in platelet counts and the risk factors associated with thrombocytopenia and mortality in pediatric intensive care patients. In addition, prognostic value of platelet counts for outcome in pediatric intensive care unit was studied. Study Design: Prospective, observational cohort analysis. Setting: 8- bedded pediatric intensive care unit of a tertiary care teaching hospital. Patients: All consecutively admitted patients (n=138) staying in the pediatric intensive care unit (PICU) for at least 48h over a 7 months period were studied. Measurements and Main Results: Thrombocytopenia was defined as platelet counts <150.0/nL. Median 1st day Pediatric Risk of Mortality Score (PRISM) was 5 (range 0-30) and median ICU stay was 4 days (range 2-98 days). Twenty five percent patients had at least one episode of thrombocytopenia during the stay. Twenty percent of these patients had thrombocytopenia on admission and rest (80%) developed it during the PICU stay. Seventy one percent (19) of the patients developed thrombocytopenia by fourth day of admission. Patients with PICU acquired thrombocytopenia had statistically significant lower baseline, nadir and 4th day platelet counts and a significantly higher drop in platelet counts (56% vs. 6% P<0.001) as compared to non thrombocytopenic patients. PRISM score, long PICU stay, sepsis, coagulopathy, and creatinine levels were significantly associated with occurrence of thrombocytopenia. Patients with thrombocytopenia had higher probability of bleeding (34% vs. 15%, P=0.01). Higher platelet counts on admission were associated with significantly reduced risk of thrombocytopenia (P=0.00) Baseline, nadir and day-4 platelet counts, presence of thrombocytopenia on admission, sepsis, coagulopathy and a higher mean PRISM score on univariate analysis were significantly associated with mortality. Leucopenia or leucocytosis, thrombocytopenia and coagulopathy were found to significantly affect outcome. Drop in platelet counts was found to have slightly higher discriminative value for mortality prediction than PRISM on the ROC curve. The survivors had higher platelet counts throughout the PICU stay and after an initial fall in platelet counts in the PICU showed a significantly higher rise in the platelet counts in the following days than the non-survivors. Conclusions: Thrombocytopenia is common in PICU. Patients requiring cardiopulmonary resuscitation or with circulatory shock, coagulopathy, sepsis and with more severe disease have higher risk of developing thrombocytopenia. Thrombocytopenic patients have a higher risk of bleeding. Drop in platelet counts >27% and thrombocytopenia were independently related to mortality. Serial measurements of platelet counts are better predictors of pediatric intensive care outcome than one-time values. Any drop in platelet counts even without thrombocytopenia needs an urgent and extensive evaluation.

Continuous renal replacement therapy in children with severe sepsis and multiorgan dysfunction - A pilot study on timing of initiation.

Objective: To evaluate the reproducibility of blind bronchial sampling in patients with suspected diagnosis of bacterial ventilator-associated pneumonia. Design: Prospective study. Setting: Pediatric intensive care unit of a tertiary care, multidisciplinary, teaching hospital in Northern India. Patients: All consecutive patients on mechanical ventilation for >48 hrs were evaluated clinically for ventilator-associated pneumonia. Interventions: Children with clinical ventilator-associated pneumonia were subjected to blind bronchial sampling twice. Measurements and Main Results: Sixty-eight blind bronchial sampling samples from 34 patients were analyzed for polymorphonuclear cells, the presence, type, and number of bacteria. Acinetobacter baumannii was the most common organism grown from distal respiratory secretions. For polymorphonuclear cells, the concordance between two blind bronchial samples was 85.3% and kappa coefficient was 0.65. The concordance for the presence and type of bacteria in Gram staining in two samples was 85.3% and kappa coefficient was 0.68. The intraclass coefficients for bacterial index and predominant species index were 0.82 (95% confidence interval 0.65–0.91) and 0.89 (95% confidence interval 0.78–0.94), respectively. The use of prior antibiotics did not adversely affect the reproducibility of blind bronchial sampling. No major complications were recorded during the procedure. Conclusions: Blind bronchial sampling of lower respiratory tract secretions in mechanically ventilated patients generates reproducible results of quantitative and qualitative cultures. We suggest that blind bronchial sampling may provide valuable clue to the bacterial etiology in ventilated child with suspected clinical ventilator-associated pneumonia.

Cerebrovascular complications in pediatric intensive care unit

WHO 2005 data points to sepsis in form of pneumonia, diarrhea, and neonatal sepsis as major killers of children in the resource limited countries of Asia and Africa, However, currently there are no specific published guidelines for treatment of severe sepsis in resource limited circumstances. An expert panel drawn from all over India, met to discuss and draw guidelines for management of pediatric septic shock that are applicable to resource limited countries. The group evaluated strength of published data and expert opinion for clinical practice and feasibility of delivery of care at various levels of resource constraints, keeping in view unique patient population and limited availability of equipment and resources. Issues for discussion included simplified definitions and reliable clinical indicators of septic shock, fluid resuscitation, graded inotropic and vasopressor support, corticosteroid therapy, timing and indication for endotracheal intubation and use of positive end expiratory pressure/mechanical ventilation, initial empirical antibiotic therapy, correction of hypoglycemia and glycemic control, role of immunoglobulin, and blood and blood products. Evidence has been graded and levels of evidence indicated wherever applicable. The expert group recognized and listed potential barrier to implementation of existing American College of Critical Care Medicine guidelines for treatment of septic shock in resource limited countries, adopted simplified definitions of septic shock, tachycardia, tachypnea and hypotension, and developed step-wise algorithmic approach for treating septic shock. Evidence based treatment recommendations include early oxygen therapy, fluid resuscitation based on blood pressure, use of dopamine in fluid refractory shock, early use of antibiotics, early intubation and assisted ventilation, correction of hypoglycemia and emphasis on use of physical examination for achieving therapeutic endpoints. These interventions have brought the mortality down and can be easily applied even at primary and/or secondary level health facilities. Interventions recommended after above steps were based on consensus rather than evidence. These include stress dose steroid therapy, use of vasopressors and inodilators, and central venous pressure and echocardiography to guide fluid and vasoactive drug infusion, which require transfer to a pediatric intensive care unit. Strict glycemic control is not recommended. Evidence on benefit of several other interventions viz. use of vasopressin as vasopressor, use of intravenous immunoglobulins, renal replacement therapy, use of plasmapheresis etc. is emerging. The expert group observed that further research evaluating individual components of guidelines and relative benefit of each of these interventions in resource limited setting is needed, as also the benefit of adherence with standardized protocol. Pediatric sepsis guidelines suitable for resource limited settings are presented for resource limited settings. Several unresolved issues were identified for further research.

ICU management of severe malaria.

Objective: Scanty literature is available regarding continuous renal replacement therapy (CRRT) utility in severe sepsis with multiorgan dysfunction syndrome (MODS) from developing countries. Author units experience in pediatric CRRT is described and outcome of early initiation of CRRT with sepsis and MODS is assessed. Materials and Methods: Children aged <16 years with sepsis and MODS who required CRRT from September 2010 to February 2015 were analyzed on demographic factors, timing of initiation of CRRT, mode of CRRT, effect of CRRT onhemodynamics, oxygenation parameters, and outcome. Results: Twenty-seven children required CRRT (male - 16). The median age was 11 years (range 1.1–16). Twenty-one had severe sepsis with MODS. Eighteen patients were given CRRT within 48 h of admission to Intensive Care Unit (ICU). Statistically significant improvement in the P/F ratio, decrement in plateau pressure and vasoactive-inotropic score were noted in survivor group compared to nonsurvivor group (P = 0.022, 0.00, and 0.03, respectively). There was no statistically significant difference in duration of ICU stay, fluid overload, CRRT duration, PRISM score at 12 and 24 h, percentage of decrease in inotrope score, plateau pressure, and percentage of increase in P/F ratio in relation to timing of CRRT initiation. However, the survival rate was 61.1% (11/18) who received CRRT within 48 h of ICU admission compared to 33.3% (3/9) who received after 48 h (P = 0.0001). Conclusion: Our study emphasizes the CRRT role in improving the oxygenation status and hemodynamics. Survival benefit may be expected in those children who receive CRRT early in the course of sepsis. However, multicenter RCTs are required to prove mortality benefit.

Comparision of two ventilation modes and their clinical implications in sick children

Cerebrovascular complications are being frequently recognized in the pediatric intensive care unit in the recent few years. The epidemiology and risk factors for pediatric stroke are different from that of the adults. The incidence of ischemic stroke is almost slightly more than that of hemorrhagic stroke. The list of diagnostic causes is increasing with the availability of newer imaging modalities and laboratory tests. The diagnostic work up depends on the age of the child and the rapidity of presentation. Magnetic resonance imaging, computerized tomography and arteriography and venography are the mainstay of diagnosis and to differentiate between ischemic and hemorrhagic events. Very sophisticated molecular diagnostic tests are required in a very few patients. There are very few pediatric studies on the management of stroke. General supportive management is as important as the specific treatment. Most of the treatment guidelines and suggestions are extrapolated from the adult studies. Few guidelines are available for the use of anticoagulants and thrombolytic agents in pediatric patients. So, our objective was to review the available literature on the childhood stroke and to provide an insight into the subject for the pediatricians and critical care providers.

Influence of non-thermal TiCl4/Ar + O2 plasma-assisted TiOx based coatings on the surface of polypropylene (PP) films for the tailoring of surface properties and cytocompatibility

Malaria is very common in India. First step in managemnt of malaria is to establish the diagnosis. It is established by using traditional smear or method like dipstick antigen captures assay which is simpler, accurate and doesn’t require expertise. Next step is to look for signs and symptoms, which help cases of severe malaria should be admitted in intensive care unit (ICU) and antimalarial chemotherapy should be started through parenteral route. Complications like coma, anemia, renal failure, pulmonary edema, disseminated intravascular coagulation are not very uncommon. These complications should be anticipated and treated in time. There is no role of corticosteroids, mannitol in the treatment of cerebral edema. Therapeutic monitoring of severe malaria should involve quantitative estimation of parasite load.