The impact of hoist sling fabrics on interface pressure whilst sitting in healthy volunteers and wheelchair users: A comparative study

Aim of the studyTo evaluate the effect of three sling fabrics on gluteal interface pressure whilst sitting in a population of wheelchair users and to compare these to data previously collected in a pilot study with a healthy population.Materials and methodsA repeated measures experimental design was used with 32 adult wheelchair users (15 women, 17 men). Healthy population pilot study consisted of 61 participants (51 women, 10 men) recruited from staff and students at The University of Salford.MethodsGluteal pressures at six pressure zones were recorded using the X-sensor PX100 pressure sensor at 30 s intervals for 10 min. Data were collected in 4 conditions with participants seated in a standardised chair, followed by the chair with slings made of three different fabrics.ResultsThe spacer fabric reduced the mean gluteal pressure more effectively than slipfit and polyester (p = 0.014 and p = 0.01 respectively, 95%CI) and reduced peak pressure at the left ischial tuberosity and coccyx when compared to the slipfit (p = 0.003 and p = 0.005) with the wheelchair users. When comparing data with the pilot study, the mean gluteal pressure and peak pressures at the ischial tuberosities and coccyx were significantly higher in the wheelchair user group (p < 0.005).ConclusionThe fabric identified as the most effective in reducing mean and peak pressures in both groups was the spacer fabric, suggesting that a spacer fabric sling is more likely to reduce the risk of pressure ulcer development.This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.     

Monitoring the biomechanical and physiological effects of postural changes during leisure chair sitting

BackgroundIndividuals with limited mobility can spend prolonged periods in leisure chairs, increasing their risk of developing a seated acquired pressure ulcer. The present study aims to use objective measures of posture and tissue viability to identify the associated risks of leisure chair related pressure ulcers.MethodsHealthy participants (n = 13) were recruited to sit on a leisure chair with either a viscoelastic foam or air cushion. Participants were asked to adopt four different postures for a period of 10 min followed by a 10 min refractory period. Measurements at the leisure chair-participant interface included interface pressure, transcutaneous tissue gas tensions at the ischial tuberosities, accelerometer data collected from the sternum and subjective comfort levels.ResultsResults indicated that interface pressures remained consistent, with peak pressure index values of less than 60 mmHg across all conditions. A proportion of participants exhibited decreased oxygen tensions associated with increased carbon dioxide tensions during one or more test condition. This was particularly prevalent during the right lean posture on the air cushion (46%). In all cases, normal tissue viability was restored during standing. The accelerometer was able to detect significant changes (p < 0.05) in relative trunk angles during slump and right lean when compared to optimal sitting posture.ConclusionCommercially available leisure chairs have little evidence to support their pressure relieving properties. This study revealed that a proportion of healthy individuals demonstrated a compromised tissue viability in specific postures. Further research is required to assess the impact of these sitting conditions in vulnerable individuals.     

Prevalence and risk factors associated with the formation of dermal lesions on the foot during hiking

BackgroundThe aim of this study is to assess the prevalence of blisters on the foot during hiking and the factors associated with this condition.Material and methodsA cross-sectional observational comparative study was conducted of 315 patients treated at two hostels, located on the Way of Saint James, in northern Spain.The study participants were interviewed and clinically examined to obtain sociodemographic and clinical variables. The variables recorded concerned the type of terrain covered (asphalt or dirt trails), the weight carried (backpack), the footwear used (weight, type, impermeability), the type of socks worn and the hydration of the skin obtained. The inclusion criteria were at least 18 years and to walk at least 20 km in the last five days.Results74% (n = 233) of the hikers presented a bullous lesion on the foot after completing several stages of hiking. The most frequent locations were the first or second metatarsal head and the fifth toe. Logistic regression showed that risk factors for the appearance of blistering were the number of kilometres walked on asphalt (p = .001 [95% CI (1.019–1.064)]) and having wet socks at the end of the day (p = . 006 [95% CI (1.286–4.479)]). The protective factors identified were walking on a dirt, grass or gravel surface (p < .001 [95% CI (0.982- 0.995)]) and using customised plantar orthoses (p = .001 [95% CI (0.085) - 0.512)]).ConclusionsThe type of terrain is a determining factor in the appearance of blisters. Walking on a dirt trail reduces the risk. Using custom made insoles and controlling humidity are other factors that should be considered as preventive measures.     

A randomized controlled trial to compare the interface pressures of alternating pressure overlay with gel pad versus gel pad alone during prolonged surgery

IntroductionProlonged surgery is a known risk of pressure ulcer formation. Pressure ulcers affect the quality of life, are a significant cause of morbidity and mortality, and pose a burden on the healthcare system. This study aimed to compare the effectiveness of an alternating pressure (AP) overlay with Gel pad against the Gel pad in reducing interface pressure (IP) during prolonged surgery.MethodsA total of 180 participants from a tertiary hospital were randomized to AP overlay with Gel pad group (n = 90) and Gel pad group (n = 90). Patients were placed supine on the pressure redistributing surfaces, and IP data under the sacrum and ischial tuberosities were collected at an interval of 30 min from 0 min up to a maximum of 570 min.ResultsBased on data from 133 participants, the average IPs during all the deflation cycles of the AP overlay (with Gel pad) were significantly lower than the average continuous IP recorded for Gel pad throughout the measuring period (p < 0.001). Only three patients (2.26% of study participants) – Gel pad group (n = 2; 2.99%) and AP overlay with Gel pad group (n = 1; 1.52%) developed post-operative pressure ulcer (p = 0.5687).ConclusionsThe lower IP during deflation cycles of the AP overlay (with Gel pad) suggests its potential effectiveness in preventing pressure ulcer formation in patients undergoing prolonged surgery. The prevention and reduction of pressure ulcers will have a considerable impact on the improved quality of life and cost savings for the patient. The study findings may facilitate the formulation of policies for preventing pressure ulcer development in the perioperative setting.     

Seated buttocks anatomy and its impact on biomechanical risk

AimThe objective of this study was to describe the amount, types, and shapes of tissue present in the buttocks during sitting (i.e., seated buttocks soft tissue anatomy), and the impact of seated buttocks soft tissue anatomy on biomechanical risk.Materials and methodsThe buttocks of 35 people, including 29 full-time wheelchair users with and without a history of pelvic pressure ulcers were scanned sitting upright on 3” of flat HR45 foam in a FONAR Upright MRI. Multi-planar scans were analyzed to calculate bulk tissue thickness, tissue composition, gluteus maximus coverage at the ischium, the contour of the skin, and pelvic tilt.ResultsBulk tissue thickness varied from 5.6 to 32.1 mm, was composed mostly of adipose tissue, and was greatest in the able-bodied cohort. Skin contours varied significantly across status group, with wheelchair users with a history of pressure ulcers having tissue with a peaked contour with a radius of curvature of 65.9 mm that wrapped more closely to the ischium (thickness at the apex = 8.2 mm) as compared to wheelchair users with no pressure ulcer history (radius of curvature = 91.5 mm and apex thickness = 14.5 mm). Finally, the majority of participants presented with little to no gluteus coverage over their ischial tuberosity, regardless of status group.ConclusionsThis study provides quantitative evidence that Biomechanical Risk, or the intrinsic characteristic of an individual's soft tissues to deform in response to extrinsic applied forces, is greater in individuals at greater risk for pressure ulcers.     

Correlation between the foot pressure index and the prevalence of plantar hyperkeratosis

BackgroundPlantar hyperkeratosis (HK) is a very prevalent foot lesion formed due to an alteration in the keratinisation process, thereby increasing keratynocites and accumulating multiple layers of the stratum corneum that leads to plantar pain. As foot shape and plantar pressures is related with their appearance, the aim of this study is to examine how foot posture and plantar pressure influence the appearance of this keratopathy.Material and methodsOn a sample of 400 subjects (201 men and 199 women), the plantar pressures were evaluated by the Footscan® platform in 10 zones. The clinical exploration consisted in the valuation of the Foot Posture Index (FPI), and the assessment of the appeerance (and location) or not of plantar calluses or hyperkeratosis.Results6.3% of the feet presented a highly supinated FPI, 15.5% were supinated, 57.3% corresponded to neutral, 17.3% were pronated and 3.8% were highly pronated. The participants with HK on the hallux, on the 1st, 2nd, 3rd or 5th MTH or on the lateral heel had a significantly higher pressure index (p < 0.001), ranging from 24.3 to 44% higher than those with no such alteration. Of the highly pronated feet, 66.7% presented HK in the hallux, while 32.3% of the supinated feet and 60% of the highly supinated feet presented it beneath the first MTH.ConclusionFoot posture influences the appearance of HK, though its association with plantar pressures. The participants with HK presented a mean foot pressure that was 32.3% higher than in those with no such condition. These values can be considered predictive for the appearance of HK and should be indicative of the need for preventive treatment.     

Determination of the effect of prophylactic dressing on the prevention of skin injuries associated with personal protective equipments in health care workers during COVID-19 pandemic

AimThe present study was carried out as a comparative observational study in order to determine the effect of prophylactic dressing on the prevention of skin injuries due to the use of personal protective equipment (PPE) in health care workers (HCWs) working with COVID-19 patients. In addition, the effect of nasal strip on the prevention of discomfort in breathing with mask was also investigated.Materials and methodsThe present study was carried out with 48 HCWs (Control Group-CG, n = 20; Experimental Group 1-EG1, n = 20; Experimental Group 2-EG2, n = 8) who use PPE on the face region and work with COVID-19 patients. Data was collected with Data Collection Form developed by researchers. In participants in CG, normal procedures of the institution in using PPE were followed. In EG1, prophylactic dressing was used on risky areas on the face. In EG2, nasal strip sticky on one side was used in addition to prophylactic dressing. The evaluation of the facial skin was made once a day by a researcher with expertise in wound management.ResultsGroups were similar in terms of demographic characteristics of participants. Overall rate of skin injuries associated with PPE use was 47.9%. Skin injuries developed in all participants in CG (n = 20), and in two and one participants in EG1 and EG2 respectively, with significant difference between groups. The most common skin injuries were Stage 1 pressure injury (29.2%), blanchable erythema of intact skin (27.1%) and itching (18.8%). No participant in EG2 reported discomfort in breathing (n = 8). Significant difference was found between groups in favor of EG2 in terms of experiencing discomfort in breathing (p < 0.001).ConclusionsIn the present study, it was established that using prophylactic dressing under PPE prevents skin injuries on the facial skin and using nasal strip prevents discomfort in breathing with mask. In view of these results, it was recommended that prophylactic dressing should be used under PPE.     

Effectiveness of a foot self-management intervention that utilized commercially available infrared thermometers: Mixed methods research incorporating a pilot RCT

ObjectiveTo evaluate the effectiveness of a foot self-management strategy that utilized a commercially-available infrared thermometer (CAIT) for prevention of diabetic foot ulcers.Research Design and MethodsIn this six-month pilot randomized controlled trial, Phase 2 of a three-phase mixed methods research study, 62 participants were randomized to a thermometer and education group (n = 34) and an education-only group (n = 26). Both groups received foot care education and were assessed by a certified orthotist. All participants recorded their number of steps and recorded a foot assessment in a logbook daily. The thermometer and education group also recorded their daily temperature assessment. A temperature difference of >4° Fahrenheit (F) between the two feet prompted participants to rest their feet. Participants were directed to see their healthcare provider if the temperature difference did not decrease to below 4° F in two days. Phase 3 of the study explored the Phase 2 results to understand the findings further.ResultsThe strategy improved foot assessment and action: the thermometer and education group had significantly more days with any assessment completed than the education-only group (150.98/180 vs. 119.84/180, p = 0.02). Phase 3 findings showed that the thermometer engaged participants, prompted action, and offered reassurance regarding foot health.ConclusionsA CAIT is a tool that could support foot self-management and may offer several benefits, such as promoting and providing structure for a foot assessment and direction for action.Clinical trial reg noNCT0306776 clinicaltrials.gov.     

Investigating the release of inflammatory cytokines in a human model of incontinence-associated dermatitis

Incontinence-associated dermatitis (IAD) is a painful complication in elderly patients, leading to reduced quality of life. Despite recent attention, its underlying inflammatory mechanisms remain poorly understood. This study was designed to quantify the release of inflammatory cytokines in a human model of IAD. The left volar forearm of ten healthy volunteers was exposed to synthetic urine and synthetic faeces for 2 h, simulating the effects of urinary and faecal incontinence, respectively, and the subsequent cytokine response compared to that of an untreated control site. Inflammatory cytokines were collected using both the Sebutape® absorption method and dermal microdialysis and quantified using immunoassays. Results from the former demonstrated an upregulation in IL-1α, IL-1RA and TNF-α. Synthetic urine caused a higher median increase in IL-1α from baseline compared to synthetic faeces, whereas synthetic faeces were associated with significantly higher median TNF-α levels compared to synthetic urine (p = 0.01). An increase in IL-1α/IL-1RA ratio was also observed with significant differences evident following exposure to synthetic urine (p = 0.047). Additionally, microdialysis revealed a time-dependent increase in IL-1β and IL-8 following exposure of up to 120 min to synthetic urine and synthetic faeces, respectively. This study demonstrated the suitability of both sampling approaches to recover quantifiable cytokine levels in biofluids for the assessment of skin status following exposure to synthetic fluids associated with incontinence. Findings suggest some differences in the inflammatory mechanisms of IAD, depending on moisture source, and the potential of the cytokines, IL-1α and TNF-α, as responsive markers of early skin damage caused by incontinence.     

Socks with an U-shaped 3D discharge element are capable to reduce dynamic plantar pressures under the central forefoot

Cushioning for the central and plantar zone of the forefoot, integrated into the body of the sock, could reduce excess pressures in that zone. The objective of this study was to verify the capacity of a sock with a cushioning element to reduce forefoot plantar pressures relative to the same sock model without that element. Dynamic plantar pressures were measured in a sample of 38 participants (25 women and 13 men) using the FootScan plate system following the two-step protocol. Measurements were made in three situations selected at random – barefoot, wearing control socks, and wearing the experimental cushioned socks. Maximum pressures were analysed in seven zones of the forefoot (hallux, lesser toes, and 1st to 5th metatarsal heads). The zone of greatest plantar pressure was in all situations located under the 3rd metatarsal head. The pressure was lower (p = 0.009) under the 2nd metatarsal head with the experimental sock (10.2 ± 3.1 N/cm²) than with the other two conditions – barefoot (11.8 ± 3.7 N/cm²) and control sock (11.9 ± 4.9 N/cm²). The 3rd metatarsal head presented lower plantar pressures (p = 0.004) with the experimental sock (12.6 ± 3.8 N/cm²) than barefoot (14.5 ± 4.9 N/cm²). The experimental socks, with plantar cushioning, were able to effectively reduce the plantar pressures on the central part of the forefoot. This reduction may lead to less discomfort for subjects suffering pain in this area, It may also result in avoiding the appearance of possible skin lesions associated with excess pressure (such as calluses, corns, or blisters).     

Preventing recurrence after surgical repair of pressure injuries in patients with spinal cord injury: Effects of a presurgical and postsurgical wheelchair seating intervention by experts

ObjectivePressure injuries in people with spinal cord injury or dysfunction (SCI/D) are known to have a high recurrence rate. As a countermeasure, we perform surgery after adjusting the wheelchair and cushion with the intervention of a seating expert. The effectiveness of seating interventions in postsurgical recurrence prevention was examined.Materials and methodsIn this retrospective analysis, the participants were 19 patients with SCI/D who underwent pressure injury surgical treatment in the gluteal region from 2005 to 2018. The patients with conventional rehabilitation were assigned to Group 1 (n = 8), and those with seating intervention by experts in addition to conventional rehabilitation were assigned to Group 2 (n = 11). The main outcome measure was the presence or absence of recurrence 3 years after the surgery. The recurrence rate was compared between the two groups.ResultsThe recurrence rates were 18% with seating intervention and 75% without; there was a significant difference (p = 0.025). The recurrence odds ratio was 13.5.ConclusionThis study suggests that presurgical seating evaluation and assessment by experts, postsurgical rehabilitation based on presurgical evaluation and assessment, and routine follow-up and seating adjustment according to changes are efficacious for preventing postsurgical pressure injury recurrence in patients with SCI/D.     

The effect of therapeutic footwear on the recurrence and new formation of foot ulcers in previously affected diabetic patients in Jeddah,Saudi Arabia

AimDiabetic foot ulcers (DFUs), which are a common serious complication of diabetes mellitus, (lifetime occurrence, 19%–34%) account for at least 85% of all lower-limb amputations in diabetic patients. Special footwear (therapeutic footwear) is frequently recommended for such patients to adapt to changes in their foot structure. We aimed to, measure the effect of therapeutic footwear on DFU development and recurrence among previously affected patients in Saudi Arabia.Materials and methodsA cross-sectional study was performed between June and September 2022. The study targeted patients aged ≥18 years previously diagnosed with DFU. Participants were contacted by telephone to complete a questionnaire assessing footwear use and foot care.ResultsThis study included 115 participants with a mean age of 61.9 ± 11.63; overall, 47% of participants used therapeutic footwear and 46% were adherent with wearing it. The DFU recurrence rate among patients who used therapeutic footwear was 27.8% versus 52.5% among patients who did not (p = 0.013). While using therapeutic footwear, patients with foot deformities reported a lower ulcer healing rate than those who did not (50% vs. 81.8%, p = 0.04). Patients who examined their feet had a lower recurrence rate than those who did not (38.5% vs. 50%, p = 0.43).ConclusionTherapeutic footwear use was significantly associated with decreased DFU recurrence. Further investigation to enhance the evidence for the effectiveness of therapeutic footwear in DFUs is warranted.     

Cost-effectiveness analysis of negative pressure wound therapy dressings after open inguinal vascular surgery – The randomised INVIPS-Trial

AimWhile the scientific evidence in favour of negative pressure wound therapy (NPWT) dressings on sutured incisions in the prevention of surgical site infections (SSIs) has increased, the cost-effectiveness after vascular surgery has not been evaluated. The aim of this study was to evaluate the cost-effectiveness of NPWT compared to standard dressings for the prevention of SSIs after open inguinal vascular surgery.Materials and methodsPatient data were retrieved from the randomised INVIPS-trial's open arm, which included patients randomised to either NPWT or standard dressings. The patients were surveyed for SSIs for 90 days postoperatively. The patients' individual cost data were included and analysed from a healthcare perspective. The patients' quality of life was measured using the Vascuqol-6 questionnaire pre- and 30 days postoperatively. Cost-effectiveness of NPWT was determined by decreased or equal total costs and a significant reduction in SSI incidence. Results: The mean vascular procedure-related costs at 90 days were €16,621 for patients treated with NPWT (n = 59) and €16,285 for patients treated with standard dressings (n = 60), p = 0.85. The SSI incidence in patients treated with NPWT was 11.9% (n = 7/59) compared to 30.0% (n = 18/60) with standard dressings, p = 0.015. This corresponds to an increased mean cost of €1,853 per SSI avoided. The cost-effectiveness plane of incremental vascular procedure-related costs and difference in Vascuqol-6 score showed that 42% of estimates were in the quadrant where NPWT was dominant. Conclusion: NPWT is considered cost-effective over standard dressings in patients undergoing open inguinal vascular surgery due to reduced SSI incidence at no higher costs.     

On cloud nine? Maternal emotional wellbeing six weeks up to one year postpartum – A cross-sectional study

BackgroundLittle is known about the full scope of emotional wellbeing of mothers up to one year postpartum, to adequately support women during transition to motherhood. Reduced emotional wellbeing (REW) affects women’s adaption to the changes and challenges in becoming a mother. We aimed to increase the knowledge and understanding of mothers’ emotional wellbeing and the influencing factors.MethodsThis cross-sectional study includes 385 Flemish mothers up to one year postpartum. Online data were collected with the General Health Questionnaire-12, Postpartum Bonding Questionnaire, Personal Well-Being Index-Adult, The Basic Psychological Needs Scale, Sense of Coherence-13 and Coping Operations Preference Enquiry.ResultsA total of 63.9% of the participants reported REW. Mothers with REW more often had (a history of) psychological problems compared to mothers with healthy emotional wellbeing (p = 0.007). Multiple linear regression analysis showed negative associations between emotional wellbeing and satisfaction (p = 0.002; p < 0.001), comprehensibility (p = 0.013) and positive associations between emotional wellbeing and bonding (p < 0.001), manageability (p = 0.033), problem solving (p = 0.030) and avoidance (p = 0,011) – with an explained variance of 55.5%.LimitationsSome limitations of our study are the GHQ-12 cut-off value, the nature and implication of (a history of) psychological problems and the self-selected population.ConclusionIt would be of worth for midwives to discuss with mothers (to be) what to expect. This - to support mothers in making sense of their life as a mother and how various factors might influence their emotional wellbeing. The high prevalence of REW is worrying, but needs to be interpreted with caution.     

Efficacy of gel containing organic extra virgin olive oil for peristomal skin hygiene: A pilot randomised controlled trial

AimTo assess the efficacy and safety of the application, during stoma hygiene, of a pH-neutral gel containing organic EVOO (oEVOO) for the maintenance of peristomal skin integrity.MethodPatients with a colostomy or ileostomy were enrolled in a pilot randomized controlled trial and assigned treatment with a pH-neutral gel made from natural products including oEVOO or usual stoma hygiene gel. The primary outcome was three domains of abnormal peristomal skin: Discolouration, Erosion and Tissue overgrowth. Secondary outcomes that were evaluated included skin moisture; oiliness; skin elasticity; water-oil balance; patients’ perceptions; difficulty inserting and removing the pouching system; pain, any other chemical, infectious, mechanical, or immunological complications of concern. The intervention lasted 8 weeks.ResultsTwenty-one patients were recruited for the trial and randomly assigned to either the experimental group (n = 12) or the control group (n = 9). The groups did not differ significantly in terms of patient characteristics. No significant differences between groups were identified either at baseline (p = 0.203) or at the end of the intervention (p = 0.397). In the experimental group, domains of abnormal peristomal skin improved after the intervention. The difference observed before and after the intervention was statistically significant (p = 0.031).ConclusionThe use of a gel containing oEVOO has shown similar levels of efficacy and safety to other gels commonly used for peristomal skin hygiene. It is also relevant to highlight that a significant improvement in skin condition was observed in the experimental group before and after the intervention.     

Influence of blistering lesions on foot functionality in hikers

BackgroundFriction blisters are formed by abrasion from frictional forces on the upper layer of the epidermis and can make physical activity an uncomfortable experience. To our knowledge, no previous studies have considered how these injuries affect the functionality of the foot. For this reason, the main aim of this study was to evaluate foot function in hikers, with or without blisters.Material and methodsThis case-control study examined 298 hikers who walked the Camino de Santiago long-distance trail (in northern Spain); 207 had one or more blistering foot lesions and 91 had no blisters. Sociodemographic and clinical variables were collected, and the number of blisters and their locations on the foot were recorded. All participants self-completed the Foot Function Index (FFI) questionnaire, in their native language.ResultsPain and disability were significantly greater among the hikers with blisters (pain p=<0.001; disability p = 0.015). However, there were no significant differences in the limitation of physical activity between those with blisters (case group) and the control group (p = 0.144). Neither was there any correlation between the number of blisters and pain, disability or limitation of activity. However, the location of the lesion did influence foot functionality. Blisters on the metatarsal heads were more limiting and caused greater pain (right foot p = 0.009; left foot p = 0.017), greater disability (right foot p = 0.005; left foot p = 0.005), greater limitation of activity (on right foot p = 0.012) and more loss of foot functionality (right foot p = 0.002; left foot p = 0.007).ConclusionThe hikers with blisters experienced reduced foot functionality in terms of pain and disability. The number of blisters was not related to foot functionality. Blisters located on the metatarsal heads caused the greatest increase in pain, disability and limitation of activity.     

Choosing an optimal headrest for preventing postoperative alopecia - A manikin study

BackgroundPostoperative alopecia is a rare complication after surgery. The etiology is thought to be pressure-induced hair follicles ischemia caused by prolonged immobilized head. Headrest is always used as head positioner during operation. The contact pressure between the head and headrest is believed to be related to the development of postoperative alopecia. The aim of this study was to find a headrest with the minimum contact pressure.MethodsFive different materials headrests — folded sheet, foam donut, gel donut, natural latex, and memory foam were examined. The contact pressures between the manikin's head and tested headrests were continuously recorded for 4 h using CONFORMat System sensor. The average and peak pressures over the contact area were measured at 15 min, 30 min, 45 min, 1 h, 2 h, 3 h, and 4 h. A generalized estimating equations (GEEs) analysis and one way repeated measures ANOVA were used to assess the data.ResultsThe memory foam headrest showed the lowest average and peak contact pressures over the contact area (p < 0.05), and the natural latex headrest, gel donut headrest, foam donut headrest, and folded sheet headrest revealed increase of the contact pressures in order. The peak contact pressure of the gel donut headrest at 4 h was significantly higher than that of at 15 min (p = 0.032) and 30 min (p = 0.037).ConclusionOf the five headrests we examined, the memory foam headrest is suggested to be the best choice for surgical patients because of its lowest contact pressure.