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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 22 (1996), S. 173-174 
    ISSN: 1432-1238
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1238
    Keywords: Trauma ; Multiple organ dysfunction syndrome ; Systemic inflammatory response syndrome ; Infection ; Shock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To evaluate the role of infection and systemic inflammatory response syndrome (SIRS) on the occurrence of early posttraumatic MODS. Design Retrospective study. Setting University Teaching Hospital ICU. Patients 163 consecutive patients hospitalized for more than 48 hours following severe trauma. Measurements and main results The patients were classified into two groups in respect to the existence of MODS at day 2. There was 27 patients in the MODS group and 136 patients in the no MODS group. The two groups were similar with respect to age, sex ratio and Simplified Acute Physiology Score. The MODS group had a higher mortality (52 versus 7%), Injury Severity Score (45±14 versus 31±13), hypovolemic shock rate (74 versus 30%), massive volume replacement rate (59 versus 6%) and SIRS rate (81 versus 54%) than the no MODS group (p〈0.05). The rate of infection was similarly low in the MODS and no MODS group (4 versus 6% respectively). Conclusion Early MODS is often associated with hypotension and massive volume administration but very rarely with infection, despite the high rate of SIRS.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1238
    Keywords: Bronchoalveolar lavage ; Fat embolism ; Trauma ; Lung injury ; Hypoxemia ; Intensive care unit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To verify whether the determination of the percentage of cells recovered by bronchoalveolar lavage and containing fat inclusions is a useful diagnostic tool of posttraumatic pulmonary fat embolism. Design Prospective study. Setting Surgical Intensive Care Units in two university hospitals. Patients 56 successive trauma patients needing prolonged postinjury mechanical ventilation, including 4 with clinical definite fat embolism syndrome, 5 in whom the diagnosis had been clinically suspected but was impossible to confirm or exclude before bronchoscopy, and 47 with no clinical evidence of the syndrome. Control groups included 8 patients without previous trauma who developed ARDS and 6 healthy surgical patients. Methods Bronchoalveolar lavage was performed within the first posttraumatic 3 days in trauma patients, at the beguining of the pulmonary disease in non trauma ARDS patients and just after anesthesic induction in healthy ortopedic patients. The magnitude of lipid content in alveolar cells was compared with the clinical pattern of the pulmonary fat embolism syndrome retrospectively evaluated at the seventh day postinjury in trauma patients. Results All the patients with definite fat embolism syndrome had more than 70% of lavage cells containing fat droplets. The group of patients in whom the diagnosis of the fat embolism syndrome was suspected had percentages of fat cells above 30% in 4 out of 5 patients. A percentage of fat cells above 30% was only observed in 7 out of the 47 patients without clinical evidence of the syndrome. The percentage varied between 0% to 35% in the group of non trauma ARDS patients and between 0 to 5% in healthy surgical patients. Conclusion Lipid inclusions in alveolar cells are common during traumatic and non-traumatic respiratory failure. Determination of the percentage of cells recovered by bronchoalveolar lavage and containing fat droplets may contribute to the diagnosis of the fat embolism syndrome in mechanically-ventilated trauma patients with respiratory failure provided that the significant threshold would be 30%.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1238
    Keywords: Key words Brain injury ; Dopamine ; Hemodynamics ; Intracranial pressure ; Kidney function ; Norepinephrine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To investigate the effects of low-dose dopamine (Dop) on renal hemodynamics and function in patients with brain trauma receiving norepinephrine (NE). Design: Prospective clinical study. Setting: Surgical intensive care unit of a university hospital. Patients: 20 stable, non-septic, mechanically ventilated, sedated patients with brain trauma and normal renal function treated with intravenous NE (0.11–0.65 μg/kg per min) to maintain an adequate cerebral perfusion pressure (〉 60 mm Hg). Interventions: Two successive 1-h study periods with NE alone then NE + Dop (2 μg/kg per min). During each period, creatinine (ClCREAT), sodium (ClNa), potassium (ClK), osmolar (ClOSM) and free water (ClH2 O), clearances were measured in all the patients. Effective renal blood flow (ERBF, paraaminohippurate clearance) and glomerular filtration rate (GFR, inulin clearance) were measured in 7 of the 20 patients. Results: Dop during NE infusion induced increases in urine flow and natriuresis which were not correlated with possible changes in arterial pressure. ClCREAT, GFR and their difference remained unchanged, whereas ERBF tended to increase. Fractional sodium excretion [100 × (ClNa/ClCREAT) ] and ClK increased during Dop infusion. Conclusion: The mechanism of Dop-induced natriuresis during NE infusion in brain trauma patients seems mainly related to a direct tubular effect of the drug.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1238
    Keywords: Key words Intensive care unit ; Ciprofloxacin ; Bioavailability ; Pharmacokinetics ; Enteral nutrition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To determine the pharmacokinetics and absolute bioavailability of ciprofloxacin in 12 critically ill patients receiving continuous enteral feeding. Design: a prospective, cross-over study. Setting: 12-bed surgical intensive care unit in a University Hospital. Patients: 12 stable critically ill patients on mechanical ventilation and receiving continuous enteral feeding (Normoréal fibres) without diarrhea or excessive residual gastric contents ( 〈 200 ml/4 h). None had gastro-intestinal disease, renal insufficiency (estimated creatinine clearance ≥ 50 ml/min) or was receiving medications that could interfere with ciprofloxacin absorption or metabolism. Measurements and main results: The study was carried out after the fourth (steady state) b. i. d. intravenous (i. v.) 1-h infusion of 400 mg and the second b. i. d. nasogastric (NG) dose of 750 mg (crushed tablet in suspension). Plasma concentrations were measured by high-performance liquid chromatography. The median (range) peak concentration after i. v. infusion was 4.1 (1.5–7.4) mg/l, and that after NG administration was 2.3 (0.7–5.8) mg/l, occurring 1.25 (0.75–3.33) h after dosing. The median [range] areas under plasma concentration-time curves were similar for the two administration routes (10.3 [3.3–34.6] and 8.4 [3.6–53.4] for i. v. infusion and NG administration, respectively). Ciprofloxacin bioavailability ranges from 31 to 82 % (median, 44 %). Conclusions: In tube-fed critically ill patients, a switch to the NG ciprofloxacin after initial i. v. therapy to simplify the treatment of severe infections is restricted to those for whom serial assessments of ciprofloxacin levels are routinely available.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1238
    Keywords: Key words C-reactive protein ; Hypovolemia ; Infection ; Organ failure ; Procalcitonin ; Trauma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objectives: To describe the initial evolution of serum procalcitonin (PCT) and C-reactive protein (CRP) in previously healthy adult trauma patients and to compare the relationship of the expression of these two proteins with indicators of trauma severity. Design: Prospective, descriptive, longitudinal study. Setting: Surgical ICU in an university hospital. Patients: Twenty-one patients admitted during the first posttraumatic 3 h exhibiting an Injury Severity Score (ISS) between 16 and 50 were enrolled. Measurements: Blood sampling was performed on admission and on posttraumatic days 0.5, 1, 2 and 3 to assess serum levels of PCT and CRP. Total creatine kinase (CKtot) and lactate dehydrogenase (LDHtot) activities in the serum were used as tissue damage indicators. Results: PCT exhibited an early and transient increase in serum levels similar to a more delayed change of CRP levels. Peak PCT and peak CRP were related to the ISS, the extent of tissue damage and the amount of fluid replacement during the first day. During the first 3 posttraumatic days, 90 % of the patients exhibited a generalized inflammatory syndrome without infection. Conclusions: An early and transient release of PCT into the circulation was observed after severe trauma and the amount of circulating PCT seemed proportional to the severity of tissue injury and hypovolemia, yet unrelated to infection. The predictive value of both PCT and CRP for a forthcoming multiple organ failure still remains to be clarified.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1238
    Keywords: Hypovolemia ; Cardiac output ; Regional blood flows ; Cardiovascular reflexes ; Catechol-amines ; Healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective To describe the evolution of systemic and regional blood flows during and after hypovolemia in humans. Design Simulation of hypovolemia by a prolonged application of lower body negative pressure (LBNP). Setting Laboratory of Clinical Research, Surgical Intensive Care Unit of an University Hospital. Participants 8 healthy male volunteers. Interventions 3 successive and increasing 15min-levels of LBNP were followed by a progressive return (10 min) to atmospheric pressure, then a 60min-recovery period. Measurements and main results Simulated hypovolemia induced a parallel one-third decrease in cardiac output (bioimpedance), musculocutaneous (venous plethysmography) and splanchnic (ICG clearance) blood flows. Adrenergic-mediated peripheral vasoconstriction prevented any change in mean arterial pressure. The decrease in renal blood flow (PAH clearance) was limited, glomerular filtration rate (inulin clearance) unchanged and thus filtration fraction increased. All the cardiovascular and biological variables returned to pre-LBNP values during the recovery period except for splanchnic blood flow which remained below control values 60 min after the return to atmospheric pressure. Conclusions Since a sustained splanchnic vasoconstriction follows a transient normotensive hypovolemia in healthy men despite adequate treatment considering arterial pressure and cardiac output, the therapeutic goals of fluid resuscitation after hypovolemic shock might be revisited and a supranormal value of cardiac output proposed.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1238
    Keywords: Cardiac output ; Transesophageal echocardiography ; Doppler ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective The aim of this study was to evaluate the accuracy of cardiac output measurement with transesophageal echocardiography (TEE) using a transgastric, pulsed Doppler method in acutely ill patients. Design Cardiac output was simultaneously measured by thermodilution (TD) and a transgastric, pulsed Doppler method. Setting The study was carried out in a surgical intensive care unit as part of the management protocol of the patients. Patients Thirty consecutive acutely ill patients with a Swan-Ganz catheter, mechanically ventilated, sedated and with a stable hemodynamic condition were included. Measurements Pulsed Doppler TEE was performed using a transgastric approach in order to obtain a long axis view of the left ventricle. Cardiac output was calculated from the left ventricular outflow tract diameter, the velocity time integral of the blood flow profile and heart rate. Results One patient was excluded because of the presence of aortic regurgitation and another, because of the impossibility of obtaining a transgastric view. Twenty-eight simultaneous measurements were performed in 28 patients. A clinically acceptable correlation and agreement were found between the two methods (Doppler cardiac output=0.889 thermodilution cardiac output +0.74l/min,r=0.975,p〈0.0001). Conclusion Transgastric pulsed Doppler measurement across the left ventricular outflow tract with TEE is a very feasible and clinically acceptable method for cardiac output measurement in acutely ill patients.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1238
    Keywords: Key words Cefpirome ; Ciprofloxacin ; Pharmacokinetics ; Systemic inflammatory response syndrome ; Trauma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To determine the pharmacokinetic parameters of cefpirome, a new so-called fourth-generation cephalosporin, in previously healthy trauma patients with posttraumatic systemic inflammatory response syndrome (SIRS) and to compare them to parameters obtained in matched, healthy volunteers. Design: A prospective study. Setting: 12-bed surgical intensive care unit in a university hospital. Patients: 9 severe [Injury Severity Score, median (range) 29 (16–50)] trauma patients on mechanical ventilation with proven or suspected cefpirome-susceptible nosocomial infection, with no renal or hepatic failure, and healthy volunteers matched for age ( ± 5 years), sex, and body surface area ( ± 10 %) were enrolled. All were men. Interventions: Cefpirome (2 g twice daily) was continuously infused over a 0.5 h period alone or concomitantly with ciprofloxacin (400 mg over 1 h, twice daily). Measurements and main results: Antibiotic concentrations in plasma were measured by high-performance liquid chromatography; their pharmacokinetic parameters were evaluated at 12 time points after the first drug administration using a noncompartmental model. Cefpirome pharmacokinetic parameters for the two groups were similar despite a wider variation for trauma patients. Specifically, the median (range) time during which the cefpirome concentration in plasma remained over 4 mg/l (corresponding to the French lower cutoff determining cefpirome susceptibility) was 9.5 (7– 〉 12) and 9 (8–12) h for trauma patients and healthy volunteers, respectively. In the group of five patients receiving combined antibiotic therapy, the interindividual variability of pharmacokinetics was wider for ciprofloxacin than for cefpirome. Conclusion: No major pharmacokinetic modification was noted when cefpirome was given to trauma patients with posttraumatic SIRS without significant organ failure, indicating that no dosage adjustment seems required in this population. However, larger studies including determination of antibiotic levels in tissues are warranted to confirm these results.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 26 (1984), S. 675-679 
    ISSN: 1432-1041
    Keywords: diltiazem ; baroreflex sensitivity ; plasma catecholamines ; normotensive subjects ; baroreceptor testing ; phenylephrine ; nitroglycerin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of oral diltiazem 120 mg, on the responses to baroreflex activation and deactivation by phenylephrine and nitroglycerin, respectively, were investigated in normotensive subjects, with simultaneous measurement of plasma catecholamine levels. Diltiazem significantly reduced the tachycardia induced by bolus injections of nitroglycerin and abolished the concomitant increase in plasma noradrenaline. It also significantly decreased the bradycardiac response to phenylephrine infusion. Diltiazem reduced, although not significantly so, the bradycardia induced by boluses of phenylephrine. The overall reduction in baroreflex sensitivity, which might contribute to the limited tachycardiac effect of diltiazem in man, is consistent with the drug-induced attenuation of the sympathetic and also of the parasympathetic components of the baroreceptor reflex.
    Type of Medium: Electronic Resource
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