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| 2. |
- Henriksson, Otto, 1976-
(author)
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Protection against cold in prehospital trauma care
- 2012
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Doctoral thesis (other academic/artistic)abstract
- Background: Protection against cold is vitally important in prehospital trauma care to reduce heat loss and prevent body core cooling. Objectives: Evaluate the effect on cold stress and thermoregulation in volunteer subjects byutilising additional insulation on a spineboard (I). Determine thermal insulation properties of blankets and rescue bags in different wind conditions (II). Establish the utility of wet clothing removal or the addition of a vapour barrier by determining the effect on heat loss within different levels of insulation in cold and warm ambient temperatures (III) and evaluating the effect on cold stress and thermoregulation in volunteer subjects (IV). Methods: Aural canal temperature, sensation of shivering and cold discomfort was evaluated in volunteer subjects, immobilised on non-insulated (n=10) or insulated (n=9) spineboards in cold outdoor conditions (I). A thermal manikin was setup inside a climatic chamber and total resultant thermal insulation for the selected ensembles was determined in low, moderate and high wind conditions (II). Dry and wet heat loss and the effect of wet clothing removal or the addition of a vapour barrier was determined with the thermal manikin dressed in either dry, wet or no clothing; with or without a vapour barrier; and with three different levels of insulation in warm and cold ambient conditions (III). The effect on metabolic rate, oesophageal temperature, skin temperature, body heat storage, heart rate, and cold discomfort by wet clothing removal or the addition of a vapour barrier was evaluated in volunteer subjects (n=8), wearing wet clothing in a cold climatic chamber during four different insulation protocols in a cross-over design (IV). Results: Additional insulation on a spine board rendered a significant reduction of estimated shivering but there was no significant difference in aural canal temperature or cold discomfort (I). In low wind conditions, thermal insulation correlated to thickness of the insulation ensemble. In greater air velocities, thermal insulation was better preserved for ensembles that were windproof and resistant to the compressive effect of the wind (II). Wet clothing removal or the use of a vapour barrier reduced total heat loss by about one fourth in the cold environment and about one third in the warm environment (III). In cold stressed wet subjects, with limited insulation applied, wet clothing removal or the addition of a vapour barrier significantly reduced metabolic rate, increased skin rewarming rate, and improved total body heat storage but there was no significant difference in heart rate or oesophageal temperature cooling rate (IV). Similar effects on heat loss and cold stress was also achieved by increasing the insulation. Cold discomfort was significantly reduced with the addition of a vapour barrier and with an increased insulation but not with wet clothing removal. Conclusions: Additional insulation on a spine board might aid in reducing cold stress inprolonged transportations in a cold environment. In extended on scene durations, the use of a windproof and compression resistant outer cover is crucial to maintain adequate thermal insulation. In a sustained cold environment in which sufficient insulation is not available, wet clothing removal or the use of a vapour barrier might be considerably important reducing heat loss and relieving cold stress.
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| 3. |
- Lampi, Maria, et al.
(author)
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Triage performance of Swedish physicians using the ATLS algorithm in a simulated mass casualty incident : a prospective cross-sectional survey
- 2013
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In: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine. - : BioMed Central (BMC). - 1757-7241. ; 21:90
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Journal article (peer-reviewed)abstract
- Background: In a mass casualty situation, medical personnel must rapidly assess and prioritize patients for treatment and transport. Triage is an important tool for medical management in disaster situations. Lack of common international and Swedish triage guidelines could lead to confusion. Attending the Advanced Trauma Life Support (ATLS) provider course is becoming compulsory in the northern part of Europe. The aim of the ATLS guidelines is provision of effective management of single critically injured patients, not mass casualties incidents. However, the use of the ABCDE algorithms from ATLS, has been proposed to be valuable, even in a disaster environment. The objective for this study was to determine whether the mnemonic ABCDE as instructed in the ATLS provider course, affects the ability of Swedish physician's to correctly triage patients in a simulated mass casualty incident.Methods: The study group included 169 ATLS provider students from 10 courses and course sites in Sweden; 153 students filled in an anonymous test just before the course and just after the course. The tests contained 3 questions based on overall priority. The assignment was to triage 15 hypothetical patients who had been involved in a bus crash. Triage was performed according to the ABCDE algorithm. In the triage, the ATLS students used a colour-coded algorithm with red for priority 1, yellow for priority 2, green for priority 3 and black for dead. The students were instructed to identify and prioritize 3 of the most critically injured patients, who should be the first to leave the scene. The same test was used before and after the course.Results: The triage section of the test was completed by 142 of the 169 participants both before and after the course. The results indicate that there was no significant difference in triage knowledge among Swedish physicians who attended the ATLS provider course. The results also showed that Swedish physicians have little experience of real mass casualty incidents and exercises.Conclusion: The mnemonic ABCDE doesn't significantly affect the ability of triage among Swedish physicians. Actions to increase Swedish physicians' knowledge of triage, within the ATLS context or separately, are warranted.
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| 4. |
- Lundgren, Peter, et al.
(author)
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Insulated spine boards for prehospital trauma care in a cold environment
- 2004
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In: International Journal of Disaster Medicine. - : Informa UK Limited. - 1503-1438 .- 1755-4713 .- 1651-3037. ; 2:1-2, s. 33-37
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Journal article (peer-reviewed)abstract
- Objectives: The aim of this study was to examine, during field conditions, what impact additional insulation on a spine board would have on thermoregulation. Method: The study was conducted outdoors, under field conditions in February in the north of Sweden. The subjects, all wearing standardised clothing, were immobilised on uninsulated (n=10) or insulated spine boards (n=9). Tympanic temperature as well as the subjects’ estimated sensation of cold and their estimated level of shivering were measured at five minute intervals during the trial. Statistical analysis of the data gathered for the first 55 minutes was performed. Results: There were no differences between the two groups regarding reduction in body core temperature or cold discomfort. There was, however, a statistically significant increase in estimated shivering for the subjects placed on uninsulated spine boards. Conclusion: Additional insulation on a spine board by the means of an insulation mat rendered a significantly reduced need for shivering in a cold environment. This is an effect that could be of great importance during protracted evacuations of injured, ill or otherwise compromised patients. In the light of these results we conclude that spine boards, as well as other materials used for prehospital transportation of patients in cold environments, should be well insulated. This is a measure that could be accomplished by such simple means as using an additional insulation mat.
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| 5. |
- Lundgren, Peter, 1977-
(author)
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Protection and treatment of hypothermia in prehospital trauma care : with emphasis on active warming
- 2012
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Doctoral thesis (other academic/artistic)abstract
- Background: In prehospital trauma care active warming is recommended to aid in protection from further cooling. However, scientific evidence of the effectiveness of active warming in a clinical setting is scarce. Also, evaluating the effectiveness of active warming, especially in harsh ambient conditions, by objective measures, is difficult. Objective: To evaluate the effectiveness of field applicabe heat sources (I) and to evaluate active warming intervention in a prehospital clinical setting (II and III). To evaluate reliability and validity of the Cold Discomfort Scale (CDS), a subjective judgement scale for assessment of the thermal state of patients in a cold environment (IV). Methods: In a laboratory trial, non-shivering hypothermic subjects (n=5), were cooled in 8 ºC water followed by spontaneous warming, a charcoal heater, two flexible hot-water bags or two chemical heat pads, all applied to the chest and upper back (I). Oesophageal temperature, skin temperature, heat flux, oxygen consumption, respiratory rate and, heart rate were measured. In two clinical randomized trials, shivering patients during road and air ambulance transport (II) and during field treatment (III) were randomized to either passive warming alone (n=22 and n=9) or to passive warming with the addition of a chemical heat pad (n=26 and n=11). Body core temperature, respiratory rate, heart rate, blood pressure (II) and the patients’ subjective sensation of thermal comfort (II and III) were measured. In a laboratory trial, shivering subjects were exposed to – 20 ºC (n=22). The CDS was evaluated regarding reliability, defined as test-retest stability, and criterion validity, defined as the ability to detect changes in cold discomfort due to changes in cumulative cold stress (IV). Results: In non-shivering hypothermic subjects postcooling afterdrop was significantly less for the chemical heat pads, but not for the hot water bags and the charcoal heater, compared to spontaneous warming (I). Temperature drop during the entire warming phase was significantly less for all the heat sources respectively, compared to spontaneous warming (I). During road and air ambulance transport, ear canal temperature was significantly increased and cold discomfort significantly decreased, both in patients assigned to passive warming only, and in patients assigned to additional active warming (II). During field treatment, cold discomfort was significantly reduced in patients assigned to additional active warming, but remained the same in patients assigned to passive warming only (III). Weighted kappa coefficient, describing test-retest stability, was 0.84 (IV). CDS ratings were significantly increased during each 30 minutes interval (IV). Conclusion: In non-shivering hypothermic subjects, heat sources were effective to attenuate afterdrop, when providing high heat content over a large surface area and effective to continue to increase body core temperature when providing sustained high heat content. In shivering trauma patients, adequate passive warming were sufficient treatment to prevent afterdrop, to slowly increase body core temperature, and to reduce cold discomfort. If inadequate passive warming, additional active warming was required to reduce cold discomfort. The CDS, a subjective judgement scale for assessment of the thermal state of patients in a cold environment seemed to be reliable regarding test-retest stability and valid regarding ability to detect change in cumulative cold stress.
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| 7. |
- Nilsson, Heléne
(author)
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Demand for Rapid and Accurate Regional Medical Response at Major Incidents
- 2013
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Doctoral thesis (other academic/artistic)abstract
- The ultimate goal in major incidents is to optimize care for the greatest number of patients. This means matching patients with facilities that have the appropriate resources available in sufficient quantities to provide the necessary care. A major incident is a situation where the available resources are inadequate in relation to the urgent need. As health care resources have become increasingly constrained, it is imperative that all resources be optimized from a regional and sometimes a national perspective.In Sweden, the number of major incidents per year is still unknown. In order to implement effective quality control of response to major incidents, specific standards for regional medical response need to be set and agreed on from a national perspective. This will probably also enhance follow-up and comparison of major incidents in the future.The overall aim of this thesis is to improve understanding of the demand for rapid and accurate regional medical response at major incidents. The objectives were to systematically analyse specific decisions within regional medical response and to identify factors that can influence patient outcome in major incidents.This research is based on four studies in which a set of 11 measurable performance indicators for initial regional medical command and control have been used as an evaluation instrument together with a simulation system where the assessment of each patient could be evaluated. The collection of data was made during several disaster management programs but also in real major incidents that occurred in two county councils in Sweden. In one of the studies, the national disaster medical response plan for burns was evaluated.This research shows that measurable performance indicators for regional medical response allow standardized evaluation such that it is possible to find crucial decisions that can be related to patient outcome. The indicators can be applied to major incidents that directly or indirectly involve casualties provided there is sufficient documentation available and thereby could constitute a measurable part of regional and national follow-up of major incidents. Reproducible simulations of mass casualty events that combine process and outcome indicators can create important results on medical surge capability and may serve to support disaster planning.The research also identified that there is a risk for delay in distribution of severely injured when many county councils needs to be involved due to different regional response times to major incidents. Furthermore, the coordination between health care and other authorities concerning ambulance helicopter transport in mass casualty events needs to be further addressed. It is concluded that there is a demand for rapid and accurate response to major incidents that is similar in all county councils. Like all other fields of medicine, these processes need to be quality assured.
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| 8. |
- Nilsson, Heléne, et al.
(author)
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Performance indicators for initial regional medical response to major incidents : a possible quality control tool
- 2012
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In: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine. - : BioMed Central. - 1757-7241. ; 20:81
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Journal article (peer-reviewed)abstract
- BackgroundTimely decisions concerning mobilization and allocation of resources and distribution of casualties are crucial in medical management of major incidents. The aim of this study was to evaluate documented initial regional medical responses to major incidents by applying a set of 11 measurable performance indicators for regional medical command and control and test the feasibility of the indicators.MethodsRetrospective data were collected from documentation from regional medical command and control at major incidents that occurred in two Swedish County Councils. Each incident was assigned to one of nine different categories and 11 measurable performance indicators for initial regional medical command and control were systematically applied. Two-way analysis of variance with one observation per cell was used for statistical analysis and the post hoc Tukey test was used for pairwise comparisons.ResultsThe set of indicators for regional medical command and control could be applied in 102 of the130 major incidents (78%), but 36 incidents had to be excluded due to incomplete documentation. The indicators were not applicable as a set for 28 incidents (21.5%) due to different characteristics and time frames. Based on the indicators studied in 66 major incidents, the results demonstrate that the regional medical management performed according to the standard in the early phases (1–10 min after alert), but there were weaknesses in the secondary phase (10–30 min after alert). The significantly lowest scores were found for Indicator 8 (formulate general guidelines for response) and Indicator 10 (decide whether or not resources in own organization are adequate).ConclusionsMeasurable performance indicators for regional medical command and control can be applied to incidents that directly or indirectly involve casualties provided there is sufficient documentation available. Measurable performance indicators can enhance follow- up and be used as a structured quality control tool as well as constitute measurable parts of a nationally based follow-up system for major incidents. Additional indicators need to be developed for hospital-related incidents such as interference with hospital infrastructure.
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| 9. |
- Nilsson, Heléne, et al.
(author)
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Quality control in disaster medicine training : Initial regional medical command and control as an example
- 2010
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In: American journal of disaster medicine. - Weston, MA, USA : Weston Medical Publishing, LLC. - 1932-149X. ; 5:1, s. 35-40
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Journal article (peer-reviewed)abstract
- OBJECTIVE: The aim of this study was to show the possibility to identify what decisions in the initial regional medical command and control (IRMCC) that have to be improved. DESIGN: This was a prospective, observational study conducted during nine similar educational programs for regional and hospital medical command and control in major incidents and disasters. Eighteen management groups were evaluated during 18 standardized simulation exercises. MAIN OUTCOME MEASURE: More detailed and quantitative evaluation methods for systematic evaluation within disaster medicine have been asked for. The hypothesis was that measurable performance indicators can create comparable results and identify weak and strong areas of performance in disaster management education and training. Methods: Evaluation of each exercise was made with a set of 11 measurable performance indicators for IRMCC. The results of each indicator were scored 0, 1, or 2 according to the performance of each management group. RESULTS: The average of the total score for IRMCC was 14.05 of 22. The two best scored performance indicators, No 1 "declaring major incident" and No 2 "deciding on level of preparedness for staff" differed significantly from the two lowest scoring performance indicators, No 7 "first information to media" and No 8 "formulate general guidelines for response." CONCLUSION: The study demonstrated that decisions such as "formulating guidelines for response and "first information to media" were areas in initial medical command and control that need to be improved. This method can serve as a quality control tool in disaster management education programs.
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| 10. |
- Nilsson, Heléne, et al.
(author)
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Simulation-assisted burn disaster planning
- 2013
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In: Burns. - : Elsevier. - 0305-4179 .- 1879-1409. ; 39:6, s. 1122-1130
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Journal article (peer-reviewed)abstract
- The aim of the study was to evaluate the Swedish medical systems response to a mass casualty burn incident in a rural area with a focus on national coordination of burn care. Data were collected from two simulations of a mass casualty incident with burns in a rural area in the mid portion of Sweden close to the Norwegian border, based on a large inventory of emergency resources available in this area as well as regional hospitals, university hospitals and burn centres in Sweden and abroad. The simulation system Emergo Train System (R) (ETS) was used and risk for preventable death and complications were used as outcome measures: simulation I, 18.5% (n = 13) preventable deaths and 15.5% (n = 11) preventable complications; simulation II, 11.4% (n = 8) preventable deaths and 11.4% (n = 8) preventable complications. The last T1 patient was evacuated after 7 h in simulation I, compared with 5 h in simulation II. Better national coordination of burn care and more timely distribution based on the experience from the first simulation, and possibly a learning effect, led to a better patient outcome in simulation II. The experience using a system that combines both process and outcome indicators can create important results that may support disaster planning.
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