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Biomedical subjects

W Lederer

Publications and source records attributed to W Lederer.

At least 19 recordsLinked to original sources
PubMed2006

[Burnout and stress disorders in intensive care doctors].

BACKGROUND AND OBJECTIVE: The various acute and chronic demands and burdens put ICU staff at greater risk for developing psychological and stress disorders. It was the aim of this study to assess the prevalence rates of burnout-syndrome in anesthetists, and to evaluate the contribution of working conditions to the development of burnout. METHODS: Self-reporting questionnaires were used to assess emotional well-being and physical health, burnout-syndrome (Maslach Burnout Inventory), and working conditions (Instrument for Stress-Oriented Task Analysis) in 89 anaesthetists (56 males, 33 females). RESULTS: One quarter of the anaesthetists show high values on the subscales "emotional exhaustion" or "depersonalization", and one fifth low values on the subscale "lack of personal accomplishment". About one quarter of the probands may be seen as "at risk for burnout". Feelings of ill-health are relatively frequent in both sexes. Long working hours and night duties, the cooperation with members of different occupational groups, and small working place resources are seen as particular stresses. CONCLUSION: Burnout-syndrome and psychosomatic symptoms are frequent in intensive care doctors. But preventive measures such as adequate resources at the work place and supervision can influence personal behavior and working conditions, and thus reduce the risk of burnout.

Adult↗
PubMed2006

Post-duty psychomotor performance in young and senior anaesthetists.

BACKGROUND AND OBJECTIVE: The level of performance in junior and senior anaesthetists was investigated after 24-h shift working and on-call duties. METHODS: Pre- and post-duty psychomotor function, influence on response time, cognitive function and well-being in 23 individuals (13 junior and 12 senior anaesthetists) was assessed before and after 24-h in-house on-call duty. Subjective perception of tiredness and concentration abilities was estimated by applying a visual analogue scale. RESULTS: The self-assessed tiredness prior to duty was high in both age groups and significantly increased in senior anaesthetists after night duty (P = 0.01). Post-duty impairment of concentration abilities was reported in both groups. Comparing results from pre- and post-duty psychometric testing showed a comparable decline in junior and senior anaesthetists as well. Assessment of burnout showed a significant lack of personal accomplishment in junior anaesthetists as compared to their older colleagues (P = 0.038). Senior anaesthetists judged their contribution to patient well-being significantly higher than did their younger colleagues (P = 0.035). CONCLUSIONS: Although tiredness and subjective impairment of concentration abilities was high in senior anaesthetists after 24-h in-house on-call duty, performance assessed by psychometric testing does not support the hypothesis that senior colleague's performance cannot keep up with routine hospital shift work.

Accidents, Traffic↗
PubMed2006

Significance of working conditions on burnout in anesthetists.

BACKGROUND: The influence of working conditions on the development of burnout syndrome was assessed in anesthetists working at a university hospital. METHODS: Self-reporting questionnaires were used to assess physical health and emotional well-being (Health and Stress Profile), burnout syndrome (Maslach Burnout Inventory) and working conditions (Instrument for Stress-Oriented Task Analysis) in anesthetists. RESULTS: Twenty-three anesthetists (25.8%) appeared to be at risk for burnout, and three anesthetists (3.4%) had already developed full-blown burnout syndrome. Anesthetists at risk for burnout more frequently suffered from limited complexity of work (P=0.001), lacking individual time control (P=0.004), lack of participation possibilities (P=0.012), and had more physical complaints (P=0.017) and greater job dissatisfaction (P=0.002) than did their colleagues with no burnout symptoms. CONCLUSION: Job conditions providing little opportunity to influence work pace and participation contribute to the development of burnout syndrome. Communication and contact with colleagues appear to be an important preventive regulative.

Adult↗
PubMed2005

[Emergency treatment of injuries following lightning and electrical accidents].

The pattern of injuries following electrical accidents and the treatment by emergency teams differ depending on whether exposure was to a low-voltage or high-voltage power source or to a lightning bolt. Tissue damage results from the direct effect of current on cell membranes and from conversion of electrical energy into heat. Depending on the magnitude of electrical energy and the duration of exposure, cardiac dysrhythmia, damage to nerve tissue, extensive burns and shock may occur. Multi-system injury is frequently observed, either directly related to electrical shock or secondary to concurrent trauma. Extrication of victims from the energy field must be performed under strict observance of self-protection measures for the rescuers. In high-voltage incidents the rescuers must wait at a distance until the power supply has been turned off and demonstrably grounded. Analgesia, anxiolysis and administration of crystalloid fluids are needed, especially for injuries from high-voltage power sources. Severe burns of the face and neck call for early intubation and ventilation. Monitoring is performed with pulsoximetry, blood pressure measurement and ECG, giving highest priority to the unconscious patient with cardiac and respiratory arrest. Cardio-pulmonary resuscitation (CPR) follows the international guidelines for resuscitation and may be effective after delayed onset and even after prolonged resuscitation attempts.

Cardiopulmonary Resuscitation↗
PubMed2004

Influence of working conditions on job satisfaction in anaesthetists.

BACKGROUND: We studied job satisfaction, physical health, emotional well-being and working conditions in 125 Austrian and Swiss anaesthetists. METHODS: Responses to self-reporting questionnaires were evaluated. Dependent variables included job satisfaction, emotional well-being and physical health. Independent variables included age, sex, marital status, position and working conditions as assessed by the Instrument for Stress-related Job Analysis. RESULTS: Control over work shows a strong effect on job satisfaction in anaesthetists, for example influence on handling tasks (P=0.001), time control (P=0.002) and participation (P=0.001), whereas task demands and task-related problems did not have any effect. Anaesthetists in leading positions and specialists reported lower job satisfaction (P=0.012) than did anaesthetists in non-leading positions. Job satisfaction was associated with better physical health (P=0.001) and better emotional well-being (P=0.005). CONCLUSIONS: Our results suggest that a high level of job satisfaction in anaesthetists correlates with interesting work demands and the opportunity to contribute skills and ideas. To improve job satisfaction, more attention should be paid to improving working conditions, including control over decision-making, and allowing anaesthetists to have more influence on their own work pace and work schedule.

Adult↗
PubMed2004

Safety aspects for public access defibrillation using automated external defibrillators near high-voltage power lines.

BACKGROUND: Automated external defibrillators (AEDs) must combine easy operability and high-quality diagnosis even under unfavorable conditions. This study determined the influence of electromagnetic interference caused by high-voltage power lines with 16.7-Hz alternating current on the quality of AEDs' rhythm analysis. METHODS: Two AEDs frequently used in Austria were tested near high-voltage power lines (15 kV or 110 kV, alternating current with 16.7 Hz). The defibrillation electrodes were attached either to a proband with true sinus rhythm or to a resuscitation dummy with generated sinus rhythm, ventricular fibrillation, ventricular tachycardia or asystole. RESULTS: Electromagnetic interference was much more prominent in a human's than in a dummy's electrocardiogram and depended on the position of the electrodes and cables in relation to the power line. Near high-voltage power lines the AEDs showed a significant operational fault. One AED interpreted the interference as a motion artifact, even when underlying rhythms were clearly detectable. The other AED interpreted 16.7-Hz oscillation as ventricular fibrillation with consequent shock advice when no underlying rhythm was detected. CONCLUSION: The tested AEDs neither filter nor recognize a technical interference of 16.7 Hz caused by 15-kV power lines above railway tracks or 110-kV overland power lines, as run by railway companies in Austria, Germany, Norway, Sweden and Switzerland. These failures in AEDs' algorithms for rhythm analysis may cause substantial harm to patients undergoing public access defibrillation. The proper function of AEDs needs to be reconsidered to guarantee patients' safety near high-voltage power lines.

Algorithms↗
PubMed2004

The professional image anticipated by anaesthesiologists.

The perspective of anaesthesiologists regarding their professional image in the eyes of colleagues and the public was assessed. A self-reporting questionnaire (Instrument for Stress-related Job Analysis) was completed by 125 anaesthesiologists. Respondents' self-image and presumed image in the eyes of colleagues do not give a bright picture of the anaesthesiologist's role. The anticipated image showed significantly more anaesthesiologists who presumed low professional recognition by their colleagues from other specialties (P = 0.002) and the lay public (P = 0.015) than those who assumed high marks. Presumed colleague opinion correlated significantly with characteristics of job satisfaction including the possibility to co-determine sequence of operations (P = 0.006), recognition of suggestions and ideas (P = 0.007) and fellow support (P = 0.001). Regarding working conditions the possibility to actively control operational procedures also significantly correlated with colleague opinion (P = 0.003). The authors conclude that the possibility to actively influence quality and pace of work on a par with surgical colleagues could help boost self-esteem and self-confidence in anaesthesiologists. Furthermore, positive image promotion in cooperating medical professions and the public could help focus more attention on the important contribution of anaesthesiology to modern medicine.

Adult↗
PubMed2003

[Analysis of ventricular fibrillation signals for the evaluation of defibrillation success in the treatment of ventricular fibrillation].

OBJECTIVE: Precise detection of ventricular fibrillation (VF), reliable prediction of defibrillation success and adjustment of the discharge waveform to the patient's transthoracic impedance may contribute to a reduction of electricity-associated myocardial injury caused by unnecessary counter shocks. Specifically, asystole thresholds distinguish between VF and asystole, and thus prevent unnecessary defibrillation attempts. We reviewed various studies and manufacturer characteristics regarding the parameters and algorithms for analyzing arrhythmia ECG signals. METHODS: Asystole threshold values of several defibrillator manufacturers were collected and a literature review was performed including the following parameters: amplitude, frequency, bispectral analysis, amplitude spectrum area, wavelets, nonlinear dynamics, N(alpha)histograms, and combinations of various parameters. RESULTS: The manufacturer dependent asystole thresholds vary substantially. We show ways to optimize an ECG-based analysis for the next technological generation of defibrillators. During advanced cardiac life support (ACLS) the probability of defibrillation success should be estimated. Optimal defibrillation waveform, depending on transthoracic resistance, should be individually determined. In case of prolonged VF with a low ECG amplitude defibrillation should not be attempted unless coronary perfusion has been improved by further measures of ACLS. The combined evaluation of VF amplitude and frequency is effective in predicting defibrillation success. Estimation of further parameters is potentially useful for guiding optimal timing of defibrillation. At present, the implementation of most parameters in out-of-hospital cardiopulmonary resuscitation (CPR) is limited by the lack of technical feasibility of online computing. CONCLUSION: Analysis of VF ECG signals should allow adequate VF detection as well as prediction of defibrillation success. Suitable asystole thresholds for analysis of ECG signals have to be determined, and the adverse effects of CPR associated artefacts on data analysis have to be reduced. Analysis of VF ECG signals is a precondition of individually optimized defibrillation and may contribute substantially to an increased quality of CPR.

Algorithms↗
PubMed2003

Prospective observational study of antiphospholipid antibodies in acute lung injury and acute respiratory distress syndrome: comparison with catastrophic antiphospholipid syndrome.

Detection of antiphospholipid (aPL) antibodies in bronchoalveolar lavage fluid (BALF) of patient with acute respiratory distress syndrome (ARDS) suggests involvement of autoimmune mechanisms in the pathogenesis of ARDS. We investigated whether aPL antibodies could be detected in the serum as well as BALF of patients with acute lung injury (ALI) and ARDS. IgG anticardiolipin, IgG anti-beta2-glycoprotein I, IgG antiphosphatidic acid and IgG antiphosphatidylserine antibodies were detected by ELISA in low titers within the normal range in the BALF and serum of nine patients with ALI and 17 patients with ARDS. However, one out of 27 patients investigated had high levels of aPL antibodies in both BALF and serum. This patient suffered from severe ARDS due to sepsis. The high aPL antibody levels in serum possibly triggered by sepsis were associated with high aPL antibody levels in BALF, which can be explained by high capillary-alveolar permeability. Computed tomography scan revealed widespread infarctions in brain, spleen and kidneys, and pulmonary thromboembolism, suggesting the diagnosis of catastrophic antiphospholipid syndrome.

Adult↗
PubMed2001

Recombinant tissue plasminogen activator during cardiopulmonary resuscitation in 108 patients with out-of-hospital cardiac arrest.

BACKGROUND: Thrombolytic therapy during cardiopulmonary resuscitation (CPR) is a controversial issue in emergency medicine practice. This study was conducted to determine whether administration of recombinant tissue plasminogen activator (rt-PA) in out-of-hospital cardiac arrest of non-traumatic aetiology improves CPR outcome. METHODS AND RESULTS: A retrospective chart review of 401 patients with out-of-hospital cardiac arrest who were resuscitated by the emergency medical services (EMS) during a 6 year period was performed. A total of 108 patients received rt-PA during CPR and were compared to 216 controls, closely matched according to baseline characteristics, arrival status and ECG findings. Administration of rt-PA was optional. Return of spontaneous circulation (ROSC) occurred in 76 patients under rt-PA treatment (70.4 vs. 51.0% in controls; P=0.001). Fifty-two patients from the lysis group survived the first 24 h (48.1 vs. 32.9% in controls; P=0.003), while 27 (25.9%) survived to discharge. Autopsy reports revealed major bleeding complications in six patients receiving rt-PA treatment. Fulminant intracranial haemorrhage was observed in one patient who received rt-PA and in two cases from the control group. CONCLUSIONS: Thrombolytic therapy may improve frequency of return of spontaneous circulation substantially and increase primary survival in patients with non-traumatic cardiac arrest. Serious bleeding complications are not frequently observed under rt-PA treatment.

Aged↗
PubMed2001

The impact of business cards on physician recognition after general anesthesia.

UNLABELLED: Despite their contribution to overall perioperative treatment of patients, anesthesiologists often remain in anonymity. We evaluated the impact of business cards on physician recognition after general anesthesia. Using a questionnaire, 441 patients were interviewed for recall of the anesthesiologist's name, the surgeon's name, and their overall satisfaction with anesthetic care 6 wk after undergoing surgery during general anesthesia. Of these patients, 155 had and 137 had not randomly received a business card during the preoperative visit, with another 149 patients serving as a control group. Business card recipients responded significantly more frequently than did nonrecipients or patients from the control group (65.8% vs 54.7% vs 53%), with recall of the anesthesiologist's name being significantly more frequent in the Business Card Recipient group (51.5% vs 14.3% vs 11.4%). Patient satisfaction with anesthetic care and recall of the surgeon's name were similar in all groups. The use of a simple tool such as a business card can indeed produce a measurable positive change in physician recognition on the part of the patient. IMPLICATIONS: Anesthesiologists often remain anonymous in everyday clinical practice. Handing a business card to the patient during the preoperative visit increased the postoperative recall of the anesthesiologist's name from 11% to 51%.

Adolescent↗