Refractory cardiac arrest in a rural area: mechanical chest compression during helicopter transport.

BACKGROUND: Out-of-hospital refractory cardiac arrest patients can be transported to a hospital for extracorporeal life support (ECLS), which can be either therapeutic or performed for organ donation. Early initiation is of vital importance and the main limitation when considering ECLS. This explains that all reported series of cardiac arrest patients referred for ECLS were urban ones. We report a series of rural out-of-hospital non-heart-beating patients transported by helicopter. METHODS: This observational study was performed in two rural districts in France. Data on patients with pre-hospital criteria for ECLS who were transported to the hospital by helicopter, maintained by mechanical chest compression, were recorded over a 2-year period. RESULTS: During the study period, 27 patients were referred for ECLS, of which 14 for therapeutic ECLS and 13 for organ preservation. The median transport distance was 37 km (25th and 75th percentiles: 31-58; range 25 to 94 km). Among the therapeutic ECLS patients, one survived to discharge from the hospital. Liver and kidneys were retrieved in another patient after brain death was ascertained. In the 13 patients referred for organ donation, four were excluded for medical reasons; 18 kidneys were retrieved in nine patients, of which six kidneys were successfully transplanted. CONCLUSION: In this preliminary study, we report the feasibility and the interest of helicopter transport of refractory cardiac arrest patients maintained by mechanical chest compression. Patients with refractory cardiac arrest occurring in rural areas, even at distance from a referral centre, can be candidates for ECLS.

Why predict climate hazards if we need to understand impacts? Putting humans back into the drought equation.

Virtually all climate monitoring and forecasting efforts concentrate on hazards rather than on impacts, while the latter are a priority for planning emergency activities and for the evaluation of mitigation strategies. Effective disaster risk management strategies need to consider the prevailing "human terrain" to predict who is at risk and how communities will be affected. There has been little effort to align the spatiotemporal granularity of socioeconomic assessments with the granularity of weather or climate monitoring. The lack of a high-resolution socioeconomic baseline leaves methodical approaches like machine learning virtually untapped for pattern recognition of extreme climate impacts on livelihood conditions. While the request for "better" socioeconomic data is not new, we highlight the need to collect and analyze environmental and socioeconomic data together and discuss novel strategies for coordinated data collection via mobile technologies from a drought risk management perspective. A better temporal, spatial, and contextual understanding of socioeconomic impacts of extreme climate conditions will help to establish complex causal pathways and quantitative proof about climate-attributable livelihood impacts. Such considerations are particularly important in the context of the latest big data-driven initiatives, such as the World Bank's Famine Action Mechanism (FAM).

Does the presence of conflict affect maternal and neonatal mortality during Caesarean sections?

INTRODUCTION: Conflicts frequently occur in countries with high maternal and neonatal mortality and can aggravate difficulties accessing emergency care. No literature is available on whether the presence of conflict influences the outcomes of mothers and neonates during Caesarean sections (C-sections) in high-mortality settings. OBJECTIVE: To determine whether the presence of conflict was associated with changes in maternal and neonatal mortality during C-sections. METHODS: We analysed routinely collected data on C-sections from 17 Médecins Sans Frontières (MSF) health facilities in 12 countries. Exposure variables included presence and intensity of conflict, type of health facility and other types of access to emergency care. RESULTS: During 2008-2015, 30,921 C-sections were performed in MSF facilities; of which 55.4% were in areas of conflict. No differences were observed in maternal mortality in conflict settings (0.1%) vs. non-conflict settings (0.1%) (P = 0.08), nor in neonatal mortality between conflict (12.2%) and non-conflict settings (11.5%) (P = 0.1). Among the C-sections carried out in conflict settings, neonatal mortality was slightly higher in war zones compared to areas of minor conflict (P = 0.02); there was no difference in maternal mortality (P = 0.38). CONCLUSIONS: Maternal and neonatal mortality did not appear to be affected by the presence of conflict in a large number of MSF facilities. This finding should encourage humanitarian organisations to support C-sections in conflict settings to ensure access to quality maternity care.

The effects of chronic hypoxemia on electrolyte and acid-base equilibrium: an examination of normocapneic hypoxemia and of the influence of hypoxemia on the adaptation to chronic hypercapnia.

We have carried out balance studies in normal dogs in order to appraise the effects of chronic hypoxemia on acid-base and electrolyte equilibrium. During the first phase of observation we produced a state of "pure" hypoxemia by reducing the oxygen concentration (utilizing nitrogen as a diluent) and by adding carbon dioxide to the environment in a concentration sufficient to keep arterial CO(2) tension (PCO(2)) within normal limits. The data demonstrate that such a 9-day period of normocapneic hypoxemia has no effect on electrolyte excretion and is virtually without effect on plasma composition. During the second phase of observation we subjected the hypoxemic dogs to stepwise increments in arterial carbon dioxide tension in order to evaluate the effects of the low oxygen tension on the acid-base adjustments to a chronic state of hypercapnia. At least 6 days was allowed for extracellular composition to reach a new steady state at each level of inspired carbon dioxide. The data demonstrate a rise in both plasma bicarbonate concentration and renal acid excretion that was not significantly different from that which has been described previously for hypercapnia without hypoxemia. Just as in these earlier studies, plasma hydrogen ion concentration rose with each increment in carbon dioxide tension, each millimeter Hg increment in PCO(2) leading to an increase in hydrogen ion concentration of 0.32 nmole per L. It thus appears that the chronic"carbon dioxide response curve" is not significantly influenced by moderately severe hypoxemia.

Nitrogen sparing induced by leucine compared with that induced by its keto analogue, alpha-ketoisocaproate, in fasting obese man.

We measured the effects of seven consecutive daily infusions of alpha-ketoisocaproate (the alpha-keto analogue of leucine) or leucine itself on urinary urea and total nitrogen excretion during fasting. Two study protocols were undertaken. In protocol I, subjects underwent three separate 14-d fasts: one during which 34 mmol/d of leucine were infused on days 1--7; a second during which 34 mmol/d of alpha-ketoisocaproate were infused on days 1--7; and a third control fast during which no infusions were given. Infusions of alpha-ketoisocaproate significantly reduced daily urine urea nitrogen excretion compared with both the control fasts and the fasts in which leucine was infused (P less than 0.001). This nitrogen-sparing effect of alpha-ketoisocaproate persisted during days 8--14 even though no further infusions were given. Daily urinary urea nitrogen excretion during fasts when leucine was administered did not differ from values observed during control fasts. In protocol II, subjects were starved on two occasions for 14 d. During one fast, infusions of 11 mmol/d of alpha-ketoisocaproate were given on days 1--7; during the control fast, no infusions were given. Daily urine urea nitrogen excretion was lower (P less than 0.001) on days 1--7 and also on days 8--14 of the fast during which alpha-ketoisocaproate was given. The nitrogen-sparing effect of alpha-ketoisocaproate could not be related to changes in circulating levels of amino acids, ketone bodies, or insulin in either protocol. We conclude that alpha-ketoisocaproate infusions decrease the nitrogen wasting of starvation, whereas leucine, studied under identical conditions, does not.

Nitrogen sparing induced by a mixture of essential amino acids given chiefly as their keto-analogues during prolonged starvation in obese subjects.

11 normal obese subjects were fasted for 33 days. In five, who served as controls, urine urea nitrogen excretion remained constant for 2 wk thereafter. The other six were given seven daily infusions containing 6-8 mmol each of the alpha-keto-analogues of valine, leucine, isoleucine, phenylalanine, and methionine (as sodium salts) plus 3-4 mmol each of the remaining essential amino acids (lysine, threonine, tryptophan, and histidine). Rapid amination of the infused ketoacids occurred, as indicated by significant increases in plasma concentrations of valine, leucine, isoleucine, alloisoleucine, phenylalanine, and methionine. Glutamine, glycine, serine, glutamate, and taurine fell significantly. Blood glucose, ketone bodies, plasma free fatty acids, and serum immunoreactive insulin concentrations were unaltered. Urine urea nitrogen fell from 1.46 to 0.89 g/day on the last day of infusions; 5 days later it was still lower (0.63 g/day) and in two subjects studied for 9 and 17 days postinfusion it remained below preinfusion control values. Urine ammonia, creatinine, and uric acid were unaltered. Nitrogen balance became less negative during and after infusions. The results indicate that this mixture of essential amino acids and their keto-analogues facilitates nitrogen sparing during prolonged starvation, in part by conversion of the ketoacids to amino acids and in part by altering mechanisms of nitrogen conservation. The latter effect persists after the ketoacids are metabolized.

The effect of carbohydrates on ammonium and ketoacid excretion during starvation.

The metabolic effects of oral ingestion of minute quantities of carbohydrate during prolonged starvation were studied in nine obese subjects. Measurements were made during a control period of total starvation, during the ingestion of 7.5 g carbohydrate daily, and finally during the ingestion of 15.0 g carbohydrate daily. Daily ketoacid excretion fell after carbohydrate ingestion and was significantly correlated (r = 0.62, P < 0.01) with the amount of carbohydrate administered. Despite this fall in ketoacids, the concentration of blood ketoacids, plasma free fatty acids, and serum insulin remained constant throughout the study. Urinary ammonium excretion, closely correlated with ketoacid output (r = 0.95, P < 0.001), also fell significantly after carbohydrate ingestion. No significant changes were present in extracellular or urinary pH. Urea nitrogen excretion did not change when urinary ammonium output fell. These results indicate that: the excretion of ketoacids and ammonium in starving man is exquisitely sensitive to minute amounts of ingested carbohydrate; the change in ketonuria appears to be due to increased renal ketoacid reabsorption after carbohydrate ingestion; and the nitrogen-sparing effect of reducing renal ammonium output in starvation can be dissociated from nitrogen sparing occurring because of changes in urine urea excretion.

Renal glomerular function and long-term lithium therapy.

Recently published studies vary widely in the quantitative assessment of glomerular filtration rate (GFR) in lithium-treated patients. Therefore, the authors tested 99 lithium-treated manic-depressive patients using several techniques to measure GFR. Ten of 86 patients who had no history of renal disease had mildly low creatinine clearance values. Significant correlations, which were not age-related, between the serum creatinine, Cockroft creatinine clearance, and duration of lithium therapy suggest a relationship between chronic lithium therapy and declining GFR. Since serum creatinine alone was insensitive, the authors recommend the use of duplicate classical creatinine clearances confirmed by Cockroft values to monitor GFR during lithium treatment.

Renal function and lithium: a longitudinal study.

Forty lithium-treated manic-depressive patients underwent two renal function assessments 6 to 18 months apart to assess the course of renal function changes associated with lithium therapy. No change in glomerular filtration rate was noted. Although the average 24-hour urine volume increased significantly, large increases occurred in few patients. Most patients had no substantial urine volume change, and a few had decreases. The changes were correlated with serum lithium levels. The results suggest that the majority of patients develop little renal concentrating impairment, while a small proportion of patients become more polyuric with further lithium treatment.

Indoor air quality and acute lower respiratory infection in Indian urban slums.

The present prospective study was conducted at two urban slums of Delhi, Kusumpur Pahari and Kathputly Colony, in the peak winter season from November 1994 through February 1995. We studied 642 infants to determine the incidence of acute lower respiratory infection (ALRI) and its relationship to indoor air pollution due to fuel used for cooking (wood or kerosene). In Kusumpur Pahari, there were 317 children (142 wood and 175 kerosene), including 64 controls and 78 cases of ALRI in the wood fuel group and 81 controls and 94 ALRI cases in the kerosene group (p > 0.05). Out of 316 children in Kathputly Colony (174 wood and 142 kerosene), there were 33 and 45 ALRI cases in the wood and kerosene groups, respectively (p < 0.05). Controls were children without ALRI and were used as controls in different groups. The demographic data and risk factors, namely, nutritional and immunization status, were comparable in ALRI cases and controls in both study areas. Pneumonia was the most common ailment in all the groups. Bronchiolitis was reported in 22.5% of the wood group and 27.1% of the kerosene group in Kathputly Colony versus 13.7% in the wood group and 12.1% in the kerosene group in Kusumpur Colony. Only one case of croup was reported from Kusumpur Pahari among wood users. The duration of illness was longer in the Kusumpur Pahari due to poor compliance, feeding, and child rearing habits. In conclusion, a higher incidence of ALRI was reported in kerosene users in Kathputly Colony, a high pollution area; however, the reasons for the differences observed need further elucidation.

Low-dose captopril in mild to moderate geriatric hypertension.

The safety and efficacy of captopril in geriatric patients with mild to moderate hypertension was examined in an eight-week multicenter study of 99 patients. Following a placebo period, patients were treated with captopril 25 mg twice daily. Patients who were uncontrolled after two weeks of active therapy were randomized to either captopril 25 mg plus hydrochlorothiazide 15 mg or captopril 50 mg twice daily. The average decrease in blood pressure at study completion was--16.9/11.9 mmHg. At the conclusion of the trial, 75.8% of patients responded to therapy. Captopril was well tolerated and believed to be a good therapeutic alternative for treating hypertension in the elderly population.

Renal conservation of ketone bodies during starvation.

Renal handling of acetoacetate and beta-hydroxybutyrate was studied in 12 obese subjects undergoing total starvation. Simultaneously, the acetoacetate, beta-hydroxybutyrate, and inulin clearance rates were measured, and acetoacetate and beta-hydroxybutyrate reabsorption rates were calculated. Renal clearance of blood acetoacetate and beta-hydroxybutyrate remained constant. In contrast, acetoacetate reabsorption rate increased significantly from 47 plus or minus 10 mumoles/min on day 3 to 106 plus or minus 15, 89 plus or minus 10, and 96 plus or minus 10 mumoles/min on days 10, 17, and 24, respectively. Similarly, beta-hydroxybutyrate reabsorption rate increased significantly from 154 plus or minus 27 mumoles/min on day 3 to 419 plus or minus 53, 399 plus or minus 25, and 436 plus or minus 53 mumoles/min on days 10, 17, and 24, respectively. Both acetoacetate and beta-hydroxybutyrate reabsorption rates increased linearly when plotted against their filtered loads. Thus, no tubular maximal transport rate exists for acetoacetate or beta-hydroxybutyrate during physiologic ketonemia. Conservation 450-500 mmoles of ketone bodies/day prevents large urinary losses of cations during prolonged starvation. Since ammonium becomes the major cation excreted during prolonged fasting, the increased renal reabsorption of ketone bodies minimizes body protein loss and aids in maintaining high circulating acetoacetate and beta-hydroxybutyrate concentrations.

Nitrogen sparing induced early in starvation by infusion of branched-chain ketoacids.

The alpha-ketoanalogues of the branched-chain amino acids were administered to fasting subjects to determine whether or not they promoted nitrogen sparing. Two fasting studies were carried out in each subject. During the first week of one of the two fasts 4.7 g of a mixture of the alpha-ketoanalogues of valine, leucine, and isoleucine were infused daily. No infusions were administered during the other fast, which served as a control. Urinary urea and calculated total urinary nitrogen were significantly lower during both the week of infusions and the ensuing week of fasting after the infusions were discontinued. Immediately after ketoacid infusions, plasma branched-chain amino acids, including allosioleucine, rose, while alanine and several other amino acids (but not glutamine) fell. There were no differences between the two fasts with respect to ketone bodies, free fatty acids, glucose, insulin, or glucagon concentrations. We conclude that branched-chain ketoacids spare nitrogen early in fasting and that this effect persists after they are metabolized.

The role of potassium in the control of ammonium excretion during starvation.

Administration of KC1 0.5 mmol/kg/day to subjects undergoin prolonged starvation reduced daily urinary ammonium and beta-hydroxybutyrate excretion by one-third. These changes were accompanied by an improvement in potassium balance and an increased rate of chloride excretion. A similar fall in ammonium excretion occurred in a second group of subjects after administration of KHCO3 0.5 mmol/kg/day. Ketone body and bicarbonate excretion remained unchanged in this group while potassium balance improved. In both the first and second groups urine pH fell significantly as the rate of excretion of urinary buffer (ammonium) decreased. When the dose of KHCO3 was increased to 1.5-2.0 mmol/kg/day in fasting subjects, the urine was alkalinized, and ammonium excretion fell to negligible levels, resulting in nitrogen sparing of 2.0 g/day. The results indicate that one-half of the increase in ammonium excretion observed in starvation is due to potassium deficiency. Nitrogen wastage caused by losses of urinary ammonium during starvation can be virtually eliminated by potassium supplementation and urinary alkalinization. The decrease in beta-hydroxybutyrate excretion after potassium chloride administration was not caused by a fall in the rate of nonionic diffusion of this organic acid related to the reduction in urine pH. The reason for the fall in beta-hydroxybutyrate excretion is not apparent, though it was associated with an increase in chloride excretion.

Gemcitabine in soft tissue or bone sarcoma resistant to standard chemotherapy: a phase II study.

PURPOSE: To assess the efficacy of gemcitabine in patients with a variety of sarcomas that have failed to respond or escaped Adriamycin- and ifosfamide-based chemotherapy. PATIENTS AND METHODS: A group of 18 symptomatic heavily pretreated patients with sarcomas of bone or soft tissue received one induction course of gemcitabine at a dose of 1000 mg/m(2) per week for 7 consecutive weeks, followed by 1 week rest. Response to the induction course was assessed by interview and by repeated ancillary tests. If no progression was observed, maintenance by gemcitabine 1000 mg/m(2) per week for 3 weeks every 28 days was given until failure was clinically or radiologically evident. RESULTS: A total of 51 cycles of gemcitabine were given including 18 cycles of induction. A mean of 3.6 postinduction cycles were given to nine patients. The treatment was well tolerated by the patients. One partial response (leiomyosarcoma) and one minimal response (angiosarcoma) were observed, yielding a true objective response rate of 5.5%. An additional six patients achieved stabilization of disease (chondrosarcoma and osteosarcoma), yielding an overall progression-free rate of 44%. The median time to progression was more than 27 weeks. Clinical benefit response was observed only in those who also achieved a progression-free state. CONCLUSION: Gemcitabine was found to be effective in achieving stabilization and even a minimal response of soft tissue or bone sarcoma refractory to standard chemotherapy.

Cytokine network in nonresponding chronic hepatitis C patients with genotype 1: role of triple therapy with interferon alpha, ribavirin, and ursodeoxycholate.

OBJECTIVE: (i) to characterize the profile of tumor necrosis factor alpha (TNF alpha), interleukin-6 (IL-6), IL 10, Fas-ligand and transforming growth factor beta (TGF beta), chronic hepatitis C (HCV) patients with genotype 1; (ii) to determine the influence of triple therapy (TT) with interferon alpha (IFN alpha) + ribavirin + ursodeoxycholic acid on these cytokines and (iii) to establish the relationship between the pro-inflammatory cytokines and the outcome of treatment. DESIGN AND METHODS: 22 patients infected with HCV-genotype 1 a/b and non responsive to IFN-alpha monotherapy were enrolled in the TT. The controls were 49 HCV naïve patients with genotype 1 a/b. Cytokine levels were measured using enzyme-linked immunosorbent assay (ELISA). RESULTS: The baseline TNF alpha values (pg/mL) in the sustained responders (SRs) (63+/-3) were significantly lower than non-responders (NRs) (140+/-16) (p < 0.001). Baseline Fas (ng/mL) levels were also lower in SRs (4.3+/-0.2) than NRs (5.4+/-0.4) (p < 0.05). CONCLUSIONS: Fas and TNF alpha may be used as serological markers of inflammation and effectiveness of therapy.

A unique renal lesion in common variable immunodeficiency.

This article reports the case of a 33-year-old woman with common variable immunodeficiency (CVI) who developed renal failure 17 years after diagnosis and initiation of treatment with monthly IVIG. A renal biopsy revealed mesangial and paramesangial immune complex deposition and interstitial granulomatous infiltration. Renal function improved with oral corticosteroids, but did not return to normal. Decreasing the dose of IVIG had no effect on renal function. Immune dysfunction can be associated with both granulomatous disease and immune complex glomerulonephritis, or the latter may be related to chronic infection or immunoglobulin use. This is the first report of concomitant glomerular-tubulointerstitial lesions in this immunodeficiency syndrome. Renal function should be closely followed in patients with CVI.

Unprovoked seizures after complex febrile convulsions.

Children with complex febrile convulsions bear a higher risk of developing epilepsy than children with simple febrile convulsions. Complex febrile convulsions are defined by the presence of prolonged seizures, partial seizures and multiple seizures occurring during the same day. The aim of this study is to delineate the relative significance of each of the three criteria defining complex febrile convulsions. Fifty-seven out of 477 children (12%) admitted for febrile convulsions had complex febrile convulsions and normal neurological examination. Follow-up was available for 48 (84%) of them. Thirteen of these 48 (27%) had epilepsy at follow-up. The mean age of seizure onset among the patients with subsequent afebrile seizures was significantly lower than the rest (10.8 months versus 16.8 months). The patients with partial febrile convulsions showed a trend toward a higher risk (45%) of developing epilepsy than the patients with multiple febrile convulsions (21%).

Radiofrequency medial branch neurotomy in litigant and nonlitigant patients with cervical whiplash: a prospective study.

STUDY DESIGN: The efficacy of radiofrequency medial branch neurotomy to treat cervical zygapophysial joint pain from whiplash was compared prospectively in litigants and nonlitigants. OBJECTIVES: 1) To assess the effect of monetary gain on treatment of zygapophysial joint pain in cervical whiplash. 2) To determine whether radiofrequency medial branch neurotomy is effective treatment for whiplash. SUMMARY OF BACKGROUND DATA: The influence of litigation on treatment outcome is a subject of controversy in both the medical and legal professions. This is the first study to examine this issue in a prospective manner using a previously proven diagnostic and therapeutic method. METHODS: Sixty patients with cervical whiplash who remained symptomatic after 20 weeks of conservative management were referred for radiofrequency cervical medial neurotomy. The patients were classified as litigant or nonlitigant based on whether the potential for monetary gain via litigation existed. Each group underwent identical evaluation and treatment. Patients were observed for 1 year. Visual analogue scores and self-reported improvement were obtained before, immediately after, and 1 year after radiofrequency cervical medial neurotomy. RESULTS: Forty-six patients completed the study. The overall reduction in cervical whiplash symptoms and visual analogue pain scores were significant immediately after treatment (nonlitigants vs. litigants: 2.0 vs. 2.5, P = 0.36) and at 1 year (nonlitigants vs. litigants: 2.9 vs. 4.0, P = 0.05). One-year follow-up scores were higher than immediate post-treatment scores (nonlitigants vs. litigants: 2.5 vs. 3.6). The difference between litigants and nonlitigants in the degree of symptomatology or response to treatment did not reach significance. CONCLUSIONS: These results demonstrate that the potential for secondary gain in patients who have cervical facet arthropathy as a result of a whiplash injury does not influence response to treatment. These data contradict the common notion that litigation promotes malingering. This study also confirms the efficacy of radiofrequency medial branch neurotomy in the treatment of traumatic cervical facet arthropathy.

Case report. Unilateral renal vein thrombosis without proteinuria.

Unilateral renal vein thrombosis occurred in a patient who was found to have an adenocarcinoma and who had previously been subjected to trauma. Proteinuria was absent throughout the patient's entire clinical course, despite its well known association with renal vein thrombosis. However, other findings suggestive of renal vein thrombosis, including back pain and tenderness, hematuria and an enlarged kidney were present. It is clear that proteinuria need not be the only signal to occasion a search for renal thrombosis. This case probably constitutes the second report of absent proteinuria when thrombus forms within renal vein.