Shor's factoring algorithm provides a superpolynomial speedup over all known classical factoring algorithms. Here, we address the question of which quantum properties fuel this advantage. We investigate a sequential variant of Shor's algorithm with a fixed overall structure and identify the role of coherence for this algorithm quantitatively.
View Article and Find Full Text PDFIt was only during the early sixties that emergency medicine started developing both world wide and especially in Germany. Although it had been realised already in the 19 th century that absence of treatment for a period after infliction of a wound had a crucial effect on recovery, and in spite of the fact that in 1938 Kirschner had stressed the need for preclinical medical care, results of research on the pathophysiology of sudden death were not available until 1960. At the same time it became possible to develop measures and methods enabling to preserve the vital functions essential for survival already at the site of an accident and during transportation or to restore them after circulatory arrest.
View Article and Find Full Text PDFAlthough the need for the implementation of a quality management concept for the German emergency medical system (EMS) has been discussed for more than 10 years, such a concept has not been realised on a broad scale. Standardised national data sheets were developed many years ago. They are used by many local agencies, but a data-gathering system on a state or national basis is still lacking.
View Article and Find Full Text PDFAnasthesiol Intensivmed Notfallmed Schmerzther
June 1997
Prerequisites for experimental study designs are extremely difficult to realise under prehospital emergency conditions. Results obtained in animal experiments always need validation with prehospital or in hospital patient studies. Investigations related to emergency medicine are, however, an ethical obligation on behalf of the patient.
View Article and Find Full Text PDFTwenty-four of the thirty-two German universities that have dental schools replied to a questionnaire survey that showed that all the schools responding held lectures on the topic "Medical Emergencies" although this is not mandatory for registration. All of the universities in the former East Germany also offered practical training sessions as part of the curriculum. The proportion of West German universities offering such courses is only 60%.
View Article and Find Full Text PDFObjective: To determine the magnitude and time course of adrenergic effects on metabolism in volunteers and possible implications for the use of sympathomimetics in the critically ill.
Design: Descriptive laboratory investigation.
Subjects: 7 volunteers.
Anasthesiol Intensivmed Notfallmed Schmerzther
December 1993
Objective: The relation of the frequency and severity of pitfalls, events and complications (PECs) was analysed in respect of preoperative risk factors. The epidemiological data were gathered as a contribution to a current project of the German Society for Anaesthesiology and Intensive Care.
Method: Preoperative data (age, sex, preexisting diseases, pathological findings, grade of urgency and ASA-class) were integrated in a paper record, as well as the perioperative interventions and directly postoperative events, type of anaesthesia, and kind of operation.
Objective: To determine the relationships between plasma concentrations of norepinephrine, epinephrine, and dopamine and oxygen consumption (VO2) during infusion of these catecholamines.
Design: Prospective, randomized variable dose, pharmacologic study in which a noncumulative infusion-rate design was used.
Setting: Laboratory of the Department of Anesthesiology at a University Hospital.
Background: This study was designed to assess the effects of a modified cardiopulmonary resuscitation (CPR) technique that consists of both active compression and active decompression of the chest (ACD CPR) versus standard CPR (STD CPR) on myocardial and cerebral blood flow during ventricular fibrillation both before and after epinephrine administration.
Methods And Results: During a 30-second period of ventricular fibrillation cardiac arrest, 14 pigs were randomized to receive either STD CPR (n = 7) or ACD CPR (n = 7). Both STD and ACD CPR were performed using an automated pneumatic piston device applied midsternum, designed to provide either active chest compression (1.
Objectives: Expired air resuscitation is an essential part of first-aid and cannot be replaced by other measures. Because of the risk of transmitting infectious diseases, the use of devices is recommended. Three types are available--masks, tubes, and foils.
View Article and Find Full Text PDFKlin Anasthesiol Intensivther
July 1993
Res Exp Med (Berl)
December 1993
There are no studies of the relationship between infusion rate of dopamine and the arterial and venous dopamine plasma concentration and the resulting haemodynamic and metabolic effects. Dopamine was administered to seven volunteers using five infusion rates (1, 3, 6, 9, 13 micrograms/kg per minute) in an escalating sequence lasting for 30 min for each step. Since dopamine can cause nausea and vomiting, this relationship was investigated after administration of domperidone for infusion rates above 3 micrograms/kg per minute.
View Article and Find Full Text PDFThe present study investigated the relationship between supraphysiological plasma concentrations of adrenaline and the resulting haemodynamic and metabolic effects. Adrenaline was administered at five infusion rates (0.01-0.
View Article and Find Full Text PDFObjectives: The objectives of this study were to evaluate a method for measuring BTV in ventilated patients and to study the short-term effect of general anesthesia with midazolam, Fentanyl, pancuronium and O2:N2O on BTV.
Design: The study included phantom measurements on a bronchoscopy model and the determination of BTV in patients in a convenience sample trial.
Setting: The study took place in a university hospital.
The purpose of this study was to assess whether plasma adrenocorticotropin, cortisol, vasopressin, and renin concentrations are higher in resuscitated than in nonresuscitated patients during cardiopulmonary resuscitation, and whether there are possible correlations between these hormones and blood pressure or heart rate in the immediate postresuscitation phase. Of 34 consecutive patients (36-85 yr of age) with out-of-hospital cardiac arrest, 20 could be successfully resuscitated and admitted to hospital, whereas in the remaining 14 patients restoration of spontaneous circulation could not be achieved. During cardiopulmonary resuscitation, median adrenocorticotropin, cortisol, vasopressin, and renin concentrations in the external jugular vein were 237 pg/ml, 32.
View Article and Find Full Text PDFObjective: To determine the relationship between iv infusion rate, plasma concentrations, and hemodynamic and metabolic actions of norepinephrine.
Design: Norepinephrine was administered by using five iv infusion rates (0.01 to 0.