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  • 1.
    Al-Azzawi, Sana Sabah
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab. College of Engineering, University of Information Technology and Communications, Baghdad 10013, Iraq.
    Khaksar, Siavash
    School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Bentley, WA 6102, Australia.
    Hadi, Emad Khdhair
    Rehabilitation Medical Center and Joint Diseases, Baghdad 10001, Iraq.
    Agrawal, Himanshu
    School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Bentley, WA 6102, Australia.
    Murray, Iain
    School of Electrical Engineering, Computing and Mathematical Sciences, Curtin University, Bentley, WA 6102, Australia.
    HeadUp: A Low-Cost Solution for Tracking Head Movement of Children with Cerebral Palsy Using IMU2021In: Sensors, E-ISSN 1424-8220, Vol. 21, no 23, article id 8148Article in journal (Refereed)
    Abstract [en]

    Cerebral palsy (CP) is a common reason for human motor ability limitations caused before birth, through infancy or early childhood. Poor head control is one of the most important problems in children with level IV CP and level V CP, which can affect many aspects of children's lives. The current visual assessment method for measuring head control ability and cervical range of motion (CROM) lacks accuracy and reliability. In this paper, a HeadUp system that is based on a low-cost, 9-axis, inertial measurement unit (IMU) is proposed to capture and evaluate the head control ability for children with CP. The proposed system wirelessly measures CROM in frontal, sagittal, and transverse planes during ordinary life activities. The system is designed to provide real-time, bidirectional communication with an Euler-based, sensor fusion algorithm (SFA) to estimate the head orientation and its control ability tracking. The experimental results for the proposed SFA show high accuracy in noise reduction with faster system response. The system is clinically tested on five typically developing children and five children with CP (age range: 2-5 years). The proposed HeadUp system can be implemented as a head control trainer in an entertaining way to motivate the child with CP to keep their head up.

  • 2.
    Bromfalk, Åsa
    et al.
    Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine, Umeå University, Umeå, Sweden.
    Hultin, Magnus
    Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine, Umeå University, Umeå, Sweden.
    Myrberg, Tomi
    Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine (Sunderbyn), Umeå University, Umeå, Sweden.
    Engström, Åsa
    Luleå University of Technology, Department of Health, Learning and Technology, Nursing and Medical Technology.
    Walldén, Jakob
    Department of Surgical and Perioperative Sciences, Anesthesiology and Intensive Care Medicine (Sundsvall), Umeå University, Umeå, Sweden.
    Postoperative recovery in preschool‐aged children: A secondary analysis of a randomized controlled trial comparing premedication with midazolam, clonidine, and dexmedetomidine2023In: Pediatric Anaesthesia, ISSN 1155-5645, E-ISSN 1460-9592, Vol. 33, no 11, p. 962-972Article in journal (Refereed)
    Abstract [en]

    Background

    Preoperative anxiety in pediatric patients can worsen postoperative outcomes and delay discharge. Drugs aimed at reducing preoperative anxiety and facilitating postoperative recovery are available; however, their effects on postoperative recovery from propofol-remifentanil anesthesia have not been studied in preschool-aged children. Thus, we aimed to investigate the effects of three sedative premedications on postoperative recovery from total intravenous anesthesia in children aged 2–6 years.

    Methods

    In this prespecified secondary analysis of a double-blinded randomized trial, 90 children scheduled for ear, nose, and throat surgery were randomized (1:1:1) to receive sedative premedication: oral midazolam 0.5 mg/kg, oral clonidine 4 μg/kg, or intranasal dexmedetomidine 2 μg/kg. Using validated instruments, outcome measures including time for readiness to discharge from the postoperative care unit, postoperative sedation, emergence delirium, anxiety, pain, and nausea/vomiting were measured.

    Results

    After excluding eight children due to drug refusal or deviation from the protocol, 82 children were included in this study. No differences were found between the groups in terms of median time [interquartile range] to readiness for discharge (midazolam, 90 min [48]; clonidine, 80 min [46]; dexmedetomidine 100.5 min [42]). Compared to the midazolam group, logistic regression with a mixed model and repeated measures approach found no differences in sedation, less emergence delirium, and less pain in the dexmedetomidine group, and less anxiety in both clonidine and dexmedetomidine groups.

    Conclusions

    No statistical difference was observed in the postoperative recovery times between the premedication regimens. Compared with midazolam, dexmedetomidine was favorable in reducing both emergence delirium and pain in the postoperative care unit, and both clonidine and dexmedetomidine reduced anxiety in the postoperative care unit. Our results indicated that premedication with α2-agonists had a better recovery profile than short-acting benzodiazepines; although the overall recovery time in the postoperative care unit was not affected.

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  • 3.
    Domellöf, Erik
    et al.
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Farooqi, Aijaz
    Umeå universitet, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Pediatrik.
    Rönnqvist, Louise
    Umeå universitet, Institutionen för psykologi.
    Improved fine motor performance in children born preterm: a longitudinal study of upper-limb kinematics from 4 to 8 years2015Conference paper (Refereed)
  • 4.
    Domellöf, Erik
    et al.
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Farooqi, Aijaz
    Umeå universitet, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Pediatrik.
    Rönnqvist, Louise
    Umeå universitet, Institutionen för psykologi.
    Relations Among Upper-Limb Movement Organization and Cognitive Function at School Age in Children Born Preterm2013In: Journal of Developmental and Behavioral Pediatrics, ISSN 0196-206X, E-ISSN 1536-7312, Vol. 34, no 5, p. 344-352Article in journal (Refereed)
  • 5.
    Domellöf, Erik
    et al.
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Farooqi, Aijaz
    Umeå universitet, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Pediatrik.
    Rönnqvist, Louise
    Umeå universitet, Institutionen för psykologi.
    Risk for Behavioral Problems Independent of Cognitive Functioning in Children Born at Low Gestational Ages2020In: Frontiers in Pediatrics , E-ISSN 2296-2360, Vol. 8, no 311Article in journal (Refereed)
  • 6.
    Jacobzon, Anna
    et al.
    Luleå University of Technology, Department of Health, Education and Technology, Nursing and Medical Technology.
    Engström, Åsa
    Luleå University of Technology, Department of Health, Education and Technology, Nursing and Medical Technology.
    Lindberg, Birgitta
    Luleå University of Technology, Department of Health, Education and Technology, Nursing and Medical Technology.
    Gustafsson, Silje Rysst
    Luleå University of Technology, Department of Health, Education and Technology, Nursing and Medical Technology.
    Mothers’ strategies for creating positive breastfeeding experiences: a critical incident study from Northern Sweden2022In: International Breastfeeding Journal, E-ISSN 1746-4358, Vol. 17, no 1, article id 35Article in journal (Refereed)
    Abstract [en]

    Background: Positive breastfeeding experiences positively influence subsequent attitudes towards breastfeeding, and increase mothers’ confidence, self-efficacy, motivation and intention to breastfeed. However, the strategies that mothers find useful and effective for creating positive breastfeeding experiences remain largely unknown. The aim of our study was thus to describe experience-based knowledge from mothers about strategies for creating positive breastfeeding experiences.

    Methods: The study followed a qualitative design involving the critical incident technique. Data were collected with an online survey containing open-ended questions that was administered to a Sweden-based parenting group on Facebook in September 2018. Ultimately, 340 incidents from 176 women were identified as offering strategies for creating positive breastfeeding experiences. Data from the written replies were extracted as textual units, condensed and categorised until categories were mutually exclusive, which resulted in six categories.

    Results: Participating women were on average 31.2 years old and the median number of children per participant was two. Mothers’ strategies for creating positive breastfeeding experiences generally included being calm and accepting that initiating breastfeeding takes time and can be difficult initially. Participants described feeling close to the baby by maintaining skin-to-skin contact and being present in the moment by taking time to appreciate the child and the breastfeeding situation, and temporarily forgetting about the world and simply being with the child in the here and now. Participants advocated baby-led breastfeeding and following correct techniques. They also described the importance of keeping an effortless mindset about breastfeeding to prevent perceiving breastfeeding as a compulsion. Mothers described acquiring knowledge about breastfeeding so that they could be prepared if breastfeeding problems occurred and getting support from professionals and family was described as significant for having a positive breastfeeding experience. Caring for oneself and one’s body, with aids if necessary, were described as important strategies, as were having a positive attitude and a strong desire to breastfeed.

    Conclusion: Because positive breastfeeding experiences and support are predictors of future breastfeeding initiation and duration, assisting women in creating positive breastfeeding experiences is important. Asking mothers to formulate strategies that they find useful could facilitate breastfeeding by making their approaches more conscious and visible.

  • 7.
    Johansson, Anna-Maria
    et al.
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Farooqi, Aijaz
    Umeå universitet, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Pediatrik.
    Rönnqvist, Louise
    Umeå universitet, Institutionen för psykologi.
    Early risk factors and cognitive outcomes in children born preterm2012In: Developmental Medicine and Child Neurology: Special Issue: Proceedings of the 3rd UK Paediatric Neuropsychology Symposium: Early Behaviour Relationships and Prognostic Indicators, 23-27 April 2012, London, UK, John Wiley & Sons , 2012, p. 24-24Conference paper (Refereed)
  • 8.
    Johansson, Anna-Maria
    et al.
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Rönnqvist, Louise
    Umeå universitet, Institutionen för psykologi.
    Long-term influences of a preterm birth on movement organization and side specialization in children at 4–8 years of age2014In: Developmental Psychobiology, ISSN 0012-1630, E-ISSN 1098-2302, Vol. 56, no 6, p. 1263-1277Article in journal (Refereed)
  • 9.
    Razzaghy-Azar, Maryam
    et al.
    Tehran University of Medical Sciences, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Metabolic Disorders Research Centre, Tehran, Iran; Iran University of Medical Sciences, H. Aliasghar Hospital, Tehran, Iran.
    Saeedi, Saeedeh
    Tehran University of Medical Sciences, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Metabolic Disorders Research Centre, Tehran, Iran; Tehran University of Medical Sciences, Endocrinology and Metabolism Clinical Sciences Institute, Endocrinology and Metabolism Research Center, Tehran, Iran.
    Dayani, Sepideh Borhan
    Tehran University of Medical Sciences, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Metabolic Disorders Research Centre, Tehran, Iran.
    Enayati, Samaneh
    Tehran University of Medical Sciences, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Metabolic Disorders Research Centre, Tehran, Iran.
    Abbasi, Farzaneh
    Tehran University of Medical Sciences, Children’s Medical Center Hospital, Growth and Development Research Center, Tehran, Iran.
    Hashemian, Somayyeh
    Mashhad University of Medical Sciences, Faculty of Medicine, Akbar Hospital, Department of Pediatric Diseases, Mashhad, Iran.
    Eshraghi, Peyman
    Mashhad University of Medical Sciences, Faculty of Medicine, Akbar Hospital, Department of Pediatric Diseases, Mashhad, Iran.
    Karimdadi, Siroos
    Mashhad University of Medical Sciences, Faculty of Medicine, Akbar Hospital, Department of Pediatric Diseases, Mashhad, Iran.
    Tajdini, Parisa
    Tehran University of Medical Sciences, Children’s Medical Center Hospital, Growth and Development Research Center, Tehran, Iran.
    Vakili, Rahim
    Mashhad University of Medical Sciences, Faculty of Medicine, Akbar Hospital, Department of Pediatric Diseases, Mashhad, Iran.
    Amoli, Mahsa M.
    Tehran University of Medical Sciences, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Metabolic Disorders Research Centre, Tehran, Iran.
    Yaghootkar, Hanieh
    Luleå University of Technology, Department of Health Sciences, Medical Science. University of Exeter, College of Medicine and Health, Genetics of Complex Traits, London; University of Westminster, School of Life Sciences, Research Centre for Optimal Health, London, England.
    Investigating Genetic Mutations in a Large Cohort of Iranian Patients with Congenital Hyperinsulinism2022In: Journal of Clinical Research in Pediatric Endocrinology, ISSN 1308-5727, Vol. 14, no 1, p. 87-95Article in journal (Refereed)
    Abstract [en]

    Objective: Congenital hyperinsulinism (CHI) is the most frequent cause of severe and persistent hypoglycaemia from birth. Understanding the pathophysiology and genetic defects behind hyperinsulinism and its complications provides clues to timely diagnosis and management. The aim of this study was to evaluate the underlying genetic aetiology of a specific Iranian pediatric cohort with CHI.

    Methods: A total of 44 unrelated children, 20 girls and 24 boys, with an initial diagnosis or history of CHI from all regions of Iran were recruited between 2016 and 2019. Targeted next generation sequencing (tNGS) was performed for the genes found in about half of CHI patients.

    Results: Mutations were identified in 24 cases (55%). Patients with a confirmed genetic cause were mainly diagnosed below age of one year old (p=0.01), had fewer other syndromic features, excluding seizure, (p=0.03), were less diazoxide responsive (p=0.04) and were more diazoxide unresponsive leading to pancreatectomy (p=0.007) compared to those with no identified mutations. Among 24 patients with identified genetic mutations, 17 (71%) had a mutation in ABCC8, 3 (12%) in KCNJ11, 3 (12%) in HADH, and 1 patient had a mutation in KMT2D. These included five novel mutations in ABCC8, KCNJ11, and KMT2D.

    Conclusion: This is the biggest genetic study of CHI in Iran. A high frequency of recessive forms of CHI, especially HADH mutations, in our study could be due to a high rate of consanguineous marriage. We recommend tNGS to screen for all the CHI genes.

  • 10.
    Romin, Elinor
    Luleå University of Technology, Department of Health, Learning and Technology.
    Uppresningsförmåga hos barn med cerebral pares: en populationsbaserad tvärsnittsstudie av 4376 barn2023Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Background: Children with cerebral palsy (CP) have movement difficulties. Sit-to-stand (STS) is one of the most frequently performed activities in daily life for children and influence their independence and activity level. The aim of this study is to analyze STS performance in children with CP and it´s relation to gender, age, GMFCS-level (Gross Motor Function Classification System) and CP subtype. Methods: This was a populationbased cross-sectional study based on data from the Swedish follow up program for CP. 4376 children (2565 boys, 1811 girls) aged 1-18 years were included. STS was analyzed in relation to gender, age, GMFCS-level and subtype. Results: Of all children with CP 60% could stand upp without support and another 16% could do it with support. STS performance differed between GMFCS-levels and between subtypes within each GMFCS-level. The difference between subtypes was clearest for children with GMFCS III-IV, where those with unilateral spastic and ataxic CP could stand up more easily. The age at which they could stand up differed between subtypes and GMFCS-levels, where children with unilateral spastic CP could stand up in younger age, while those with dyskinetic CP had most difficulties regardless of age. There was a clear correlation between STS and GMFCS-level and children with GMFCS-level IV-V could stand up at an older age compared to children with GMFCS-level I-III. Children with GMFCS-level III-IV had a gradually improved STS performance up to 18 years of age. Conclusion: STS performance in children with CP is strongly correlated to GMFCS-level. The age in which children with CP can stand up differs between GMFCS-levels. The majority of children with GMFCS-level I-II can stand up without support at the age of 4. Children with GMFCS-level III-IV continue to improve their STS performance gradually until adulthood. The subtype within each GMFCS-level has a small impact on STS performance.

  • 11.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Fysioterapi.
    Faroogi, Aijaz
    Umeå universitet, Pediatrik.
    Domellöf, Magnus
    Umeå universitet, Pediatrik.
    Riklund, Katrine
    Umeå universitet, Institutionen för strålningsvetenskaper.
    Lindqvist, Thomas
    Umeå universitet, Institutionen för strålningsvetenskaper.
    Birgander, Richard
    Umeå universitet, Institutionen för strålningsvetenskaper.
    Effects of twin-births on IQ, handedness, and brain volumes in 8-years-old preterm born twins and matched singletons: a pilot study2016In: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 58, no S6, p. 57-Article in journal (Refereed)
  • 12.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Diagnostisk radiologi.
    Lenfeldt, Niklas
    Umeå universitet, Neurovetenskaper.
    Long-term effects of a preterm birth on cerebellar volumes and myelination: links to children's cognitive and motor performance at 8-years of age2021Conference paper (Refereed)
  • 13.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Umeå centrum för funktionell hjärnavbildning (UFBI).
    Lindqvist, Thomas
    Umeå universitet, Diagnostisk radiologi.
    Birgander, Richard
    Umeå universitet, Diagnostisk radiologi.
    Long term effects of preterm births: associations between upper-limb kinematics, brain volumes and cognitive functions2014Conference paper (Refereed)
  • 14.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Institutionen för psykologi.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Kinematic analysis of sequential goal-directed movements in at-risk, preterm born children2014In: Gait & Posture, ISSN 0966-6362, E-ISSN 1879-2219, Vol. 39, no Suppl 1, p. 22-Article in journal (Other academic)
  • 15.
    Rönnqvist, Louise
    et al.
    Umeå universitet, Institutionen för psykologi.
    Lenfeldt, Niklas
    Umeå universitet, Klinisk neurovetenskap.
    Johansson, Anna-Maria
    Umeå universitet, Institutionen för psykologi.
    Riklund, Katrine
    Umeå universitet, Diagnostisk radiologi.
    Warntjes, Marcel J. B.
    Department Centre for Medical Image Science and Visualization, Linköping University.
    Domellöf, Erik
    Umeå universitet, Institutionen för psykologi.
    Assessment of myelin and brain volumes at early school-age: long-term effects of a preterm birth2018In: Developmental Medicine & Child Neurology, ISSN 0012-1622, E-ISSN 1469-8749, Vol. 60, no S2, p. 20-20Article in journal (Refereed)
  • 16.
    Socher, Michaela
    et al.
    Department of Behavioural Sciences and Learning, Linköping University, Linköping, Sweden; Linnaeus Centre HEAD, Swedish Institute for Disability Research, Linköping University, Linköping, Sweden; Fraunhofer Institute for Building Physics IBP, Institute Stuttgart Stuttgart, Germany.
    Löfkvist, Ulrika
    Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden; Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden.
    Wass, Malin
    Luleå University of Technology, Department of Health, Learning and Technology, Health, Medicine and Rehabilitation.
    Comparing the semantic networks of children with cochlear implants and children with typical hearing: Effects of length of language access2022In: Journal of Communication Disorders, ISSN 0021-9924, E-ISSN 1873-7994, Vol. 99, article id 106247Article in journal (Refereed)
    Abstract [en]

    Purpose

    Kenett et al. (2013) report that the sematic networks, measured by using an oral semantic fluency task, of children with cochlear implants (CI) are less structured compared to the sematic networks of children with typical hearing (TH). This study aims to evaluate if such differences are only evident if children with CI are compared to children with TH matched on chronological age, or also if they are compared to children with TH matched on hearing age.

    Method

    The performance of a group of children with CI on a verbal fluency task was compared to the performance of a group of chronological-age matched children with TH. Subsequently, computational network analysis was used to compare the semantic network structure of the groups. The same procedure was applied to compare a group of children with CI to a group of hearing-age matched children with TH.

    Results

    The children with CI perform on the same level on an oral semantic verbal fluency task as the children with TH matched on hearing age. There are significant differences in terms of the structure of the semantic network between the groups. The magnitude of these differences is very small and they are non-significant for a proportion of nodes included in the bootstrap analysis. This indicates that there is no true difference between the networks. Hearing age, but not age at implantation was found to be significantly positively correlated with semantic verbal fluency performance for the children with CI.

    Conclusions

    The results from the current study indicate that length of language exposure is an important factor for the structure of the semantic network and the performance on a semantic verbal fluency task for children with CI. Further studies are needed to explore the role of the accessibility of the language input for the development of semantic networks of children with CI.

  • 17.
    Venuti, Gianna
    et al.
    Luleå University of Technology, Department of Health, Education and Technology.
    Andersson, Fredrik
    Luleå University of Technology, Department of Health, Education and Technology.
    Sjuksköterskors upplevelser av att vårda akut sjuka barn prehospitalt2024Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Introduktion: Sjuksköterskor inom ambulanssjukvården är ofta de första i vårdkedjan som kommer i kontakt med patienten vid akut sjukdom eller skada. I de fall patienten är ett barn ställs större krav på sjuksköterskan då anatomin och sjukdomstillståndet skiljer sig beroende på vilken ålder barnet är i. Syfte: Syftet med studien var att undersöka sjuksköterskors upplevelser av att vårda akut sjuka barn prehospitalt. Metod: Studien genomfördes med en kvalitativ forskningsmetod genom semistrukturerade intervjuer och insamlad data analyserades utifrån kvalitativ innehållsanalys. Nio sjuksköterskor och ambulanssjuksköterskor inkluderas till studien och de arbetade på glesbygd samt i stad. Resultat: I resultatet framkom känslor av osäkerhet och saknad av tillräcklig kunskap oavsett antal verksamma år. Sjuksköterskorna upplevde det positivt att inkludera föräldrarna i omhändertagandet medan distans till sjukhus och brist på resurser gav en känsla av utsatthet. Deltagarna var överens om att kompetens inom teamet påverkar känslan vid larm på akut sjuka barn och att kommunikation blir viktigare i stressiga situationer. Slutsats: Om det endast är brist på kunskap som ligger till grund för rädslan gällande att ha långt till sjukhus framgår inte i studien. Ökad kunskap skulle kunna tänkas bidra till ökad trygghet och minskad osäkerhet hos prehospital personal vid omhändertagande av akut sjuka barn. Fortsatt forskning inom området anser författarna krävs då det tydligt finns delar inom att vårda akut sjuka barn som behöver utvecklas.

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  • 18.
    Winkel, Jørgen
    Luleå University of Technology, Department of Business Administration, Technology and Social Sciences, Human Work Science. National Board of Occupational Safety and Health, Research Department, Unit of Work Physiology, S-171 84 Solna, Sweden.
    An accurate plethysmograph for measurement of changes in the volume of the human foot1986In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847, Vol. 29, no 6, p. 801-805Article in journal (Refereed)
    Abstract [en]

    A foot plethysmograph is described and evaluated. It is intended for recording changes in foot volume when the instrument has to be removed from the foot between measurements to make physical activity possible. The mean sensitivity was ±0·5 ml and the mean experimental error 1·6 ml or 0·16% of the mean foot volume (n = 37). The accuracy of the method is thus considerably higher than that of previously reported methods for corresponding applications. In addition, it is inexpensive and can easily be used outside the laboratory.

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