Preliminary Laboratory Vibration Testing of a Complete Neonatal Patient Transport System

Darwaish, F.; Selzler, Roger; Law, Andrew; Chen, E.; Ibey, Andrew; Aubertin, Cheryl; Greenwood, Kim; Redpath, Stephanie; Chan, Alvin C.; Green, J.R.; Langlois, Robert

doi:10.1109/embc44109.2020.9175852

Cited by 6 publications

(7 citation statements)

References 5 publications

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“…The vertical vibration results indicated a resonant frequency in the 9 Hz range. These results are similar to the Carleton University findings from the preliminary road test sessions [2], that identified a peak at approximately 9.5 Hz and represented these results via PSDs. Other papers also indicated peak vibrations in the vertical direction for the incubator at approximately 8-10 Hz [5,19,20,21].…”

Section: The Investigation Of Mitigation Approaches To Reduce Vibrati...supporting

confidence: 87%

“…Under the multi-year research initiative, Carleton University has already completed a proof-of-concept study [41], and an initial set of on-road and laboratory testing with characterization of the vibration environment [2,42]. To better comprehend the vibration and noise exposure, the research team looked to further characterize the vibration and noise environment of a ground ambulance by focusing on different road classifications.…”

Section: Thesis Objectivesmentioning

confidence: 99%

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A Study of Vibration and Noise During Neonatal Patient Transport by Ground Ambulance

Kehoe

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Often, preterm infants requiring specialized care are transported to a higher care facility by air or ground ambulance. Studies have shown higher rates of mortality and morbidity in outborn patients, and concerns have been raised with respect to the vibration and noise environment during transport. To address these issues, Carleton University is working on a multi-year collaborative research project focused on three pillars: characterization of vibration and noise during transport, laboratory experimentation, and investigation of mitigation approaches. This study expands on existing characterization of vibration and noise by focusing on different road classifications and the impact of discrete events such as railway crossings and pothole strikes. In addition, a novel approach of full vehicle testing is demonstrated along with the evaluation of preliminary mitigation solutions. Finally, a method for determining the optimal location for a transport system or estimating acceleration values throughout an ambulance is presented.

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Section: The Investigation Of Mitigation Approaches To Reduce Vibrati...supporting

confidence: 87%

Section: Thesis Objectivesmentioning

confidence: 99%

A Study of Vibration and Noise During Neonatal Patient Transport by Ground Ambulance

Kehoe

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“…The test data used to run the simulations was recorded during preliminary ground ambulance testing. This test involved driving on a variety of road types throughout Ottawa, Canada, and accelerometer and inertial measurement unit (IMU) data were recorded at locations on the floor of the vehicle and across the stretcher, NPTS, and baby manikin [5]. The test replicated by the current roll model corresponds to a 2.5 kg manikin transported over a highspeed arterial road, with the frequency response based off data recorded over a duration of 278 seconds.…”

Section: Neonatal Patient Transport Systemmentioning

confidence: 99%

Dynamic Modelling of the Standard Neonatal Patient Transport System using a Newton-Euler Based Formulation in the Roll Plane

Gibb¹,

Kehoe²,

Hurley³

et al. 2022

International Conference of Control, Dynamic Systems, and Robotics

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“…Many studies have looked to quantify the vibration exposure of neonatal patients during ambulance transport. [2][3][4][5][6] There are only a few studies that considered the vibration analysis through laboratory testing, but these are limited to the testing of the transport system, 7 or the transport incubator. 8 Laboratory testing provides some advantages over road testing by eliminating important confounding factors such as weather, traffic conditions, different vehicle models, and driver behavior.…”

Section: Introductionmentioning

confidence: 99%

“…8 Laboratory testing provides some advantages over road testing by eliminating important confounding factors such as weather, traffic conditions, different vehicle models, and driver behavior. Carleton University is collaborating with the Children's Hospital of Eastern Ontario (CHEO) and the National Research Council Canada (NRC) to develop a standardized test procedure that includes three test approaches: a Carleton University developed isolette shaker for evaluating mattresses and harnesses 9 ; a single-axis shaker table test of the full neonatal transport system using a constructed floor to investigate the effect of the interface between the NPTS and the ambulance 7 ; and full vehicle testing on a tire-coupled road simulator to include coupling effects with the vehicle dynamics. To further understand the vibration exposure of neonatal patients during road transportation to specialized hospitals, we here explore full vehicle laboratory testing on a tire-coupled road simulator, a novel approach to better understand the vibration exposure and the effectiveness of vibration mitigation.…”

Section: Introductionmentioning

confidence: 99%

Simulating whole-body vibration for neonatal patients on a tire-coupled road simulator

Kehoe,

Gibb,

Hurley

et al. 2024

Proc Inst Mech Eng H

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Exposure to excessive whole-body vibration is linked to health issues and may result in increased rates of mortality and morbidity in infants. Newborn infants requiring specialized treatment at neonatal intensive care units often require transportation by road ambulance to specialized care centers, exposing the infants to potentially harmful vibration and noise. A standardized Neonatal Patient Transport System (NPTS) has been deployed in Ontario, Canada, that provides life saving equipment to patients and safe operation for the clinical care staff. However, there is evidence that suggests patients may experience a higher amplitude of vibration at certain frequencies when compared with the vehicle vibration. In a multi-year collaborative project, we seek to create a standardized test procedure to evaluate the levels of vibration and the effectiveness of mitigation strategies. Previous studies have looked at laboratory vibration testing of a transport system or transport incubator and were limited to single degree of freedom excitation, neglecting the combined effects of rotational motion. This study considers laboratory testing of a full vehicle and patient transport system on an MTS Model 320 Tire-Coupled Road Simulator. The simulation of road profiles and discrete events on a tire-coupled road simulator allows for the evaluation of the vibration levels of the transport system and the exploration of mitigation strategies in a controlled setting. The tire-coupled simulator can excite six degrees-of-freedom motion of the transport system for vibration evaluation in three orthogonal directions including the contributions of the three rotational degrees of freedom. The vibration data measured on the transport system during the tire-coupled testing are compared to corresponding road test data to assess the accuracy of the vibration environment replication. Three runs of the same drive file were conducted during the laboratory testing, allowing the identification of anomalies and evaluation of the repeatability. The tire-coupled full vehicle testing revealed a high level of accuracy in re-creating the road sections and synthesized random profiles. The simulation of high amplitude discrete events, such as speed hump traverses, were highly repeatable, yet yielded less accurate results with respect to the peak amplitudes at the patient. The resulting accelerations collected at the input to the manikin (sensor located under the mattress) matched well between the real-world and road simulator. The sensors used during testing included series 3741B uni-axial and series 356A01 tri-axial accelerometers by PCB Piezotronics. These results indicate a tire-coupled road simulator can be used to accurately evaluate vibration levels and assess the benefits of future mitigation strategies in a controlled setting with a high level of repeatability.

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Preliminary Laboratory Vibration Testing of a Complete Neonatal Patient Transport System

Cited by 6 publications

References 5 publications

A Study of Vibration and Noise During Neonatal Patient Transport by Ground Ambulance

A Study of Vibration and Noise During Neonatal Patient Transport by Ground Ambulance

Dynamic Modelling of the Standard Neonatal Patient Transport System using a Newton-Euler Based Formulation in the Roll Plane

Simulating whole-body vibration for neonatal patients on a tire-coupled road simulator

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