3D anatomy and deformation of the seated buttocks

Sonenblum, Sharon Eve; Sprigle, Stephen; Cathcart, John; Winder, R. J.

doi:10.1016/j.jtv.2015.03.003

Cited by 50 publications

(37 citation statements)

References 35 publications

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“…Similar small movements of short duration were seen in a 2002 pilot study [36]. Although the effects of these movements on blood flow may be less significant [17,[43][44], they have the potential to change the internal deformation of tissue [11,45] and may provide important physiological benefits in terms of pressure ulcer prevention. Furthermore, small movements have the potential to help dissipate heat and reduce humidity [46].…”

Section: Ws Frequencymentioning

confidence: 55%

“…Intrinsic factors include the influences of nutrition, age, injury, and disease, among others [7][8][9][10]. Additionally, recent imaging studies have documented vast variations in buttocks anatomy, tissue type, and quality [11][12], which will also influence the tissue response to loading [13][14]. Magnitude and duration of loading are currently most readily measured in practice.…”

Section: Introductionmentioning

confidence: 99%

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Everyday sitting behavior of full-time wheelchair users

Sonenblum

Sprigle

Martin³

2016

J Rehabil Res Dev

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Abstract-The objective of this study was to describe the inseat movement and weight-shifting behavior of full-time wheelchair users. We measured everyday sitting behavior for 192 d across 28 individuals who used manual wheelchairs as their primary mobility device. To obtain the measurements, we used eight thin force sensors placed under participants' wheelchair cushions. On a typical day, participants spent an average of 10.6 +/ 3.0 h in their wheelchair and transferred out of the wheelchair 8.4 +/ 4.3 times. Participants only performed pressure reliefs (90% off-loading of the entire buttocks for at least 15 s) 0.4 +/ 0.5 times per hour they were seated in the chair, but they performed weight shifts (WSs) (30%-90% off-loading of at least one side of the buttocks for 15 s) with a frequency of 2.4 +/ 2.2 times per hour. Despite the higher frequency of WSs, they were not performed in a routine manner. Half of the days studied included one segment of upright sitting lasting at least 2 h without a WS. Given these observations, we conclude that seating evaluations should emphasize positioning individuals in a way that facilitates reaching, leaning, and transferring in a safe manner, not only to improve function but also to affect buttocks loading.

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Section: Ws Frequencymentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Everyday sitting behavior of full-time wheelchair users

Sonenblum

Sprigle

Martin³

2016

J Rehabil Res Dev

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“…This finding may be beneficial for cushion manufacturers as less time will be needed to examine those properties of different materials that affect moisture at the user–seat interface [12,13]; which would also be instrumental in reducing time for cushion selection. Consequently, the authors can conceive of the development of a simple, quick and easy system to allow clinicians to offer constructive suggestions regarding suitability of cushion materials in a semi-bespoke manner to wheelchair-reliant patients/end-users or their caregivers [14,15]. …”

Section: Discussionmentioning

confidence: 99%

Performance Assessment of a Humidity Measurement System and Its Use to Evaluate Moisture Characteristics of Wheelchair Cushions at the User–Seat Interface

Liu

Cheng

Luo

et al. 2017

Sensors

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Little is known about the changes in moisture that occur at the body–seat interface during sitting. However, as increased moisture can add to the risk of skin damage, we have developed an array of MEMS (Micro-Electro-Mechanical System) humidity sensors to measure at this interface. Sensors were first evaluated against traceable standards, followed by use in a cross-over field test (n = 11; 20 min duration) using different wheelchair cushions (foam and gel). Relative humidity (RH) was measured at the left mid-thigh, right mid-thigh and coccyx. Sensors were shown to be unaffected by loading and showed highly reliable responses to measured changes in humidity, varying little from the traceable standard (<5%). Field-test data, smoothed through a moving average filter, revealed significant differences between the three chosen locations and between the gel and foam cushions. Maximum RH was attained in less than five minutes regardless of cushion material (foam or gel). Importantly, RH does not appear to distribute uniformly over the body–seat interface; suggesting multiple sensor positions would appear essential for effectively monitoring moisture in this interface. Material properties of the cushions appear to have a significant effect on RH characteristics (profile) at the body–seat interface, but not necessarily the time to peak moisture.

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“…MRI can be used to observe elements of biomechanical risk (Figure ). For example, MRI shows displacement of adipose and gluteal soft tissue relative to the bone, with the most strain occurring in adipose tissue, when a load is applied . Variations in such displacement can distinguish among able‐bodied individuals and SCI patients with or without a history of PrU .…”

Section: Background and Introductionmentioning

confidence: 99%

Pressure ulcer summit 2018: An interdisciplinary approach to improve our understanding of the risk of pressure‐induced tissue damage

Gould

Bohn

Bryant

et al. 2019

Wound Repair Regeneration

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Pressure ulcers (PrUs) affect approximately 2.5 million patients and account for 60,000 deaths annually. They are associated with an additional annual cost of $43,000 per related hospital stay and a total cost to the US health care system as high as $25 billion. Despite the implementation of national and international PrU prevention guidelines and toolkits, rates of facility-acquired PrU s and PrUs in people with spinal cord injury are still high. A new paradigm is needed that distinguishes between prevention and treatment research methods and includes not only the causative factors of pressure and tissue deformation but also patient-specific anatomical differences and the concomitant biological cellular processes, including reperfusion injury, toxic metabolites, ischemia, cell distortion, impaired lymphatic drainage, and impaired interstitial fluid flow that compound existing tissue damage.

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3D anatomy and deformation of the seated buttocks

Cited by 50 publications

References 35 publications

Everyday sitting behavior of full-time wheelchair users

Everyday sitting behavior of full-time wheelchair users

Performance Assessment of a Humidity Measurement System and Its Use to Evaluate Moisture Characteristics of Wheelchair Cushions at the User–Seat Interface

Pressure ulcer summit 2018: An interdisciplinary approach to improve our understanding of the risk of pressure‐induced tissue damage

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