Transportation of patients in medical vehicles - Problems and comfort solutions
Dinko Mikulić
University of Applied Sciences Velika Gorica
Draško Mück
DOK-ING d.o.o. Zagreb
Robert Spudić
Veleučilište Hrvatsko zagorje Krapina
Keywords: medical vehicles, emergency vehicles, ambulance vehicles, medical suspension, vibration problem, air suspension
Abstract
Medical vehicles are produced on the basis of cargo vans, transporters. Such vehicles, without adequate modifications, do not offer comfort necessary for transport of patients. Harmful body vibrations cause discomfort and can worsen the condition of the patient lying on the stretcher. The patient is not protected and cannot receive adequate care due to the vibrations. The research problem lies in the suspension of such vehicles, which is intended for the transport of cargo and is not adapted for the transport of sick and injured or hospitalized patients.
The experiences of patients when transported over long distances bring desperate stories. Severe bounces, vibrations, shocks, jolts and side-to-side rolling of the vehicle can not only cause secondary injuries to patients, but can also affect the use of instruments and equipment in the vehicle. The paper presents the method of installing such a suspension in a medical vehicle. By replacing the old metal spring with an active air bellow, harmful vibrations are reduced and eliminated, thus increasing the comfort of transporting patients with medical vehicles.
References
Gavranović Ž.: „Toliko je nehumano da može biti nazvano zločinom protiv čovječnosti“. PLUSportal Slavonski Brod, https://plusportal.hr/politika/toliko-je-nehumano-da-moze-biti-nazvano-zlocinom-protiv-covjecnosti-51121?slide=1&fbclid=IwAR1EG7IpZCf7Leit7TNvFbs SH0llHr9hDdUUlOpzGq4TsxQBbNeDWmsqNE; 5.12.2023.
Mikulić, D., Muck D., Pakšec E.: Osnova zaštite pacijenata od štetnih vibracija u medicinskim vozilima – medicinski ovjes. Polytechnic and Design, Vol.10, No.4. 2022. str 239-250.
Hrvatski zavod za hitnu medicinu. Standard vozila i vanjskog izgleda vozila za obavljanje djelatnosti izvanbolničke hitne medicine, NN 80/2016, https://www.hzhm.hr
Hrvatska norma HRN EN 1789:2020, Medicinski automobili i njihova oprema – Cestovni medicinski automobil (EN 1789:2007+A1:2010) 2011, Hrvatski zavod za norme.
Klegraefe N.: Force plate reliability and dynamics for ambulance vibration suppression, Worcester Polytechnic Institute, 2010. https://digital.wpi.edu/concern/student_works/47429b71w
Graziosi J., Barber L., Wojcik M.: Ambulance Services, Reliability Problems and Potential Technologies, Project Number 9003, Worcester Polytechnic Institute, 2010. https://core.ac.uk/download/pdf/212969385.pdf; 15.02.2022.
Janczur R.: Vertical accelerations of the body of a motor vehicle when crossing a speed bump, Cracow University of Technology, Faculty of Mechanical Engineering, The Archives of Automotive Engineering - Archiwum Motoryzacji 1/2015; vol.67; 47-60. http://www.aaejournal.com/Vertical-accelerations-of-the-body-of-a-motor-vehicle-when-crossing-a-speed-bump,99367,0,2.html
Brammer J. A., Von Gierke E. H.: Effects of shock and vibration on humans, Chapter 42. https://www.researchgate.net/publication/44056533; 15.03.2022.
Mikulić, D.: Motorna vozila, teorija kretanja i konstrukcija, Veleučilište Velika Gorica, ISBN 978-953-7716-89-9, Velika Gorica, 2020, str. 306-349.
VB air suspensions for Commercial Light Vehicles, Brochure VB-FullAir, Product sheet VB, Varsseveld, Holand, https://www.vbairsuspension.com/en/page/downloads/remaining.html
https://www.vbairsuspension.com/en/news/1923/ambulance-with-full-air-suspension-maneuvers-skillfully-through-roadworks.html; https://ems-ambulance.com/services/road-ambulances; 10. 04.2022.
Citroen Jumper, tehničke karakteristike i oprema, brošura, https://business.citroen.hr,
https://loadsafe.nz/wp-content/uploads/2019/05/VB_FullAir.pdf; 15.02.2022.
Air Springs 2B8-550, Basic principles, Goodyear-Air-Spring-Data, http://lhtech.com/pdf/automation/pneumatic/Goodyear-Air-Spring-Data.pdf, 12.04.2022.

