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Flödeslarm 112: Gränssnitt för gasövervakning i vägambulans
2014 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This dissertation represents a master thesis in the education Industrial design engineering for a master of science degree in in Product design, at Luleå University of Technology. The objective of the assignment was to create a user interface design concept for a gas alarm, to be used in respiratory care with medical air and oxygen during ambulance transport. The educational objective was to select, apply, and immerse theories and practices relevant to the product subject and the assignment statement. The assignment was provided by Länsteknik Medical Technology in Luleå, Norrbotten. Most of the thesis assignment-related part has been carried out for the ambulance service in Luleå, after that, in consultation with Länsteknik, it was decided that the gas alarm would be developed with a focus on users in integration with the user environment.The project originated from paramedics’ complaints about the lack of easy monitoring of the flow of gas from the air and oxygen bottles. That means problems when they do not discover until afterwards if treatments are not continued, because the gas bottle is empty or incorrectly installed. Upon closer inspection of the situation it was found that there is also need for a reminder to shut off gas flow, as this is another procedure that paramedics might otherwise oversee. Hence the first task was to establish if there really is a need for a gas flow alarm and why. Further the study has been about designing proposals for a suitable gas alarm which is to sense and notify if the bottle is open, closed or when the bottle is empty.In order to provide appropriate boisterous it is needed to send out matching signals about what will be alerted. Development has taken place from two different perspectives. First a wider where the studies focused on identifying what kind of signals that are suitable for alarm presentation and for what purposes. Subsequently, a more narrow perspective in which it was determined what kind of signals that would be used, and the work was concentrated on the detailed study and modify their presentation. Consequently studies of users’ perspective and theoretical studies, focusing on how people perceive different types of alarm signals and different kinds of presentation of the signals were conducted. The thesis has thus been carried out with the assignment and focuses on current users and efficient environment, but with the support of theoretical material and suitable methodology of study Technical design.The final result is a gas alarm whose solution should be equipped with technology that senses and conveys qualitative information regarding whether a gas flow will or not, then it turned on for respiratory care. The presentation will be reactive with visual and auditory signals. When switched on, a yellow light is lit for reminding that the flow is started from the current gas bottle, so it is not forgotten after a call- out. If the stream fails, the indicator turns over to red color while audio is presented for extra attention. This also indicates that the gas runs out or the bottle is unopened, being reasons that flow can fail. The production has been limited to the minimum necessary input that the paramedics believe is relevant and that is possible to read in parallel with other work tasks. This was clarified by means of design guidelines identified within the theoretical studies. This means that the color coding and symbols used according to what suits the medical concepts and the gases that the alarm intends. Also that the placement and sizing of the input element and the gas alarm overall has been adapted relatively cause and what is visual and audible in the ambulances.The most significant issues identified during the development of user interfaces for alarm is that the presentation has to be weighed carefully in relation to the most/least that should be presented to users in the current environment. Perception and knowledge about what it consists of can be very different with developers, final users and technical intermediaries. Positive alarm- effects appears when they are recognized and interpreted, quickly and easily, succeed in influencing people to adjust. Therefore, it is vital to design and dimension relatively cause and significance, and what is possible to comply with. Negative effects that might otherwise occur, of both over and under sizing, is that the alarm is not recognized, misinterpreted or perceived as irrelevant and distracting. These aspects are particularly important to consider in the design for ambulance service, where users already before alarm presentation often find themselves in stressful and mentally demanding situations.

Place, publisher, year, edition, pages
2014. , 172 p.
Keyword [en]
Keyword [sv]
Teknik, Designa larm/gränssnitt
URN: urn:nbn:se:ltu:diva-58363Local ID: ef409cc1-3573-4a63-96c2-f64fd109ef96OAI: diva2:1031751
External cooperation
Subject / course
Student thesis, at least 30 credits
Educational program
Industrial Design Engineering, master's level
Validerat; 20140913 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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