Assessment of pressure pain thresholds in collisions with collaborative robots

Park, Moon Young; Han, Doyeon; Lim, Jung Ho; Shin, Min Kyung; Han, Young Rok; Kim, Dong Hwan; Rhim, Sungsoo; Kim, Kyung Sook

doi:10.1371/journal.pone.0215890

Cited by 22 publications

(21 citation statements)

References 11 publications

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“…In our study the ME/CFS patients without FM had a similar baseline PPT on the finger compared to HC, and a lower baseline PPT on the shoulder compared to HC. A recent study in HC by Park et al showed higher PPT on hands and fingers compared to the PPT of muscular parts, indicating the finger to be relatively less sensitive to pain (41). Despite the absence of a difference in PPT of the finger in patients without FM, PPT of the shoulder were significantly lower than that of HC.…”

Section: Discussionmentioning

confidence: 87%

Orthostatic stress testing in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients with or without concomitant fibromyalgia: effects on pressure pain thresholds and temporal summation

Campen¹,

Rowe

Verheugt³

et al.

Authorea

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Introduction: muscle pain/fibromyalgia (FM) is common among individuals with myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). We recently demonstrated that during orthostatic stress testing, adults with ME/CFS reported increased pain. In the current study, we hypothesized that pain pressure thresholds (PPT) would decrease and temporal summation (windup) would increase after head-up tilt testing (HUT), and that the presence of co-morbid FM would be associated with greater change in both measures. Methods and Results: 248 ME/CFS patients (164 with FM and84 without FM), and 22 healthy controls (HC) were analyzed. In HC there were no significant differences in PPT between pre-and post-HUT (finger: from 4.7(1.6) to 4.4(1.5); shoulder: from 2.8(1.0) to 2.9(1.0)). In ME/CFS patients with and without FM, a significant decrease in PPT post-HUT was found compared to HC (both p<0.0001). Patients with FM had a lower PPT pre-and post-HUT (finger: from 2.0(0.9) to 1.5(0.8); shoulder: from 1.2(0.5) to 1.0(0.5) compared to patients without FM (finger: from 5.0(1.6) to 3.3(1.5); shoulder: from 2.2(0.9) to1.9(1.0) (p ranging from 0.001 to <0.0001). In contrast to HC in ME/CFS patients windup was increased compared to HC pre-HUT (both p<0.0001), but did not significantly change post-HUT. Conclusions: Pressure pain threshold decreased in ME/CFS patients with or without fibromyalgia after head-up tilt test (HUT), compared to healthy controls. Windup pre-and post-HUT was significantly higher compared to healthy controls, but did not change from pre-to post-HUT. These results demonstrate that, like exercise, orthostatic stress can negatively influence the physiology of pain perception in ME/CFS.

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Section: Discussionmentioning

confidence: 87%

Orthostatic stress testing in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients with or without concomitant fibromyalgia: effects on pressure pain thresholds and temporal summation

Campen¹,

Rowe

Verheugt³

et al.

Authorea

View full text Add to dashboard Cite

show abstract

“…Then, the subject was placed in the testing system and the body part was secured. To be consistent with the procedure followed by Melia et al (2019) and Park et al (2019), the subject was reminded to stop the load test the moment the pressure felt at the body location changed to a slight painful feeling. In each subject's first session, several test runs were executed to familiarize them with the procedure and to train their ability to distinguish the pain from discomfort.…”

Section: Work Plan and Proceduresmentioning

confidence: 99%

“…Unlike other studies with a similar scope, Melia et al focused on limits based on peak pressures, instead of maximum forces. Park et al (2019) repeated their experiments with 90 male subjects, but only on 15 body locations.…”

mentioning

confidence: 99%

A Statistical Model to Determine Biomechanical Limits for Physically Safe Interactions With Collaborative Robots

Behrens

Pliske

Umbreit³

et al. 2022

Front. Robot. AI

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Collaborative robots (cobots) provide a wide range of opportunities to improve the ergonomics and efficiency of manual work stations. ISO/TS 15066 defines power and force limiting (PFL) as one of four safeguarding modes for these robots. PFL specifies biomechanical limits for hazardous impacts and pinching contacts that a cobot must not exceed to protect humans from serious injuries. Most of the limits in ISO/TS 15066 are preliminary, since they are based on unverified data from a literature survey. This article presents a human-subject study that provides new and experimentally verified limits for biomechanically safe interactions between humans and cobots. The new limits are specifically tailored to impact and pinching transferred through blunt and semi-sharp surfaces as they can occur in the event of human error or technical failures. Altogether 112 subjects participated in the study and were subjected to tests with emulated impact and pinching loads at 28 different body locations. During the experiments, the contact force was gradually increased until the load evoked a slightly painful feeling on the subject’s body location under test. The results confirm that the pain thresholds of males and females are different in specific body regions. Therefore, when defining biomechanical limits, the gender difference must be taken into account. A regression model was utilized to incorporate the gender effect as a covariate into a conventional statistical distribution model that can be used to calculate individual limits, precisely fitted to a specific percentile of a mixed group of male and female workers which interacting with cobots.

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“…Different metrics have been offered to estimate and quantify injuries deriving from human-robot collisions [14][15][16][17][18]. These works cover industrial robots and define clear criteria to minimize injuries that impact the robot's shape, weight, velocity, and direction in which it may approach humans.…”

Section: Measures Of Risks Inherent To Collisions With Robotsmentioning

confidence: 99%

Safety Concerns Emerging from Robots Navigating in Crowded Pedestrian Areas

Salvini

Paez-Granados

Billard

2021

Int J of Soc Robotics

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The slogan “robots will pervade our environment” has become a reality. Drones and ground robots are used for commercial purposes while semi-autonomous driving systems are standard accessories to traditional cars. However, while our eyes have been riveted on dangers and accidents arising from drones falling and autonomous cars’ crashing, much less attention has been ported to dangers arising from the imminent arrival of robots that share the floor with pedestrians and will mix with human crowds. These robots range from semi or autonomous mobile platforms designed for providing several kinds of service, such as assistant, patrolling, tour-guide, delivery, human transportation, etc. We highlight and discuss potential sources of injury emerging from contacts of robots with pedestrians through a set of case studies. We look specifically at dangers deriving from robots moving in dense crowds. In such situations, contact will not only be unavoidable, but may be desirable to ensure that the robot moves with the flow. As an outlook toward the future, we also offer some thoughts on the psychological risks, beyond the physical hazards, arising from the robot’s appearance and behaviour. We also advocate for new policies to regulate mobile robots traffic and enforce proper end user’s training.

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Assessment of pressure pain thresholds in collisions with collaborative robots

Cited by 22 publications

References 11 publications

Orthostatic stress testing in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients with or without concomitant fibromyalgia: effects on pressure pain thresholds and temporal summation

Orthostatic stress testing in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) patients with or without concomitant fibromyalgia: effects on pressure pain thresholds and temporal summation

A Statistical Model to Determine Biomechanical Limits for Physically Safe Interactions With Collaborative Robots

Safety Concerns Emerging from Robots Navigating in Crowded Pedestrian Areas

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