The effectiveness of a hydrocolloid crusting method versus standard care in the treatment of incontinence-associated dermatitis among adult patients in an acute care setting: A randomised controlled trial

IntroductionIncontinence-associated dermatitis (IAD) is a type of irritant contact dermatitis due to prolonged exposure of the skin to moisture induced by urine or/and faeces. The main principles when treating IAD involves protecting the skin from further exposure to irritants, establishing a healing environment, and eradicating skin infections. This study aimed to evaluate the effectiveness of the hydrocolloid crusting method (HCM) versus the standard care method (SCM) in treating IAD.MethodA randomised controlled trial was conducted in an acute tertiary hospital in Singapore between August 2019 to September 2021. Using computer-generated numbers, patients were randomised into either HCM or SCM treatment groups. HCM treatment involved cleansing the affected area with a pH-neutral non-rinse moisturising cleanser, and the application of alternate layers of hydrocolloid powder, and non-sting film barrier spray (repeated three times during each use). Patients in the SCM treatment group received the same cleanser followed by a 30% zinc oxide barrier cream. IAD was assessed daily for up to seven days by the wound care nurses using the IAD severity tool. The primary outcome of the study was the mean difference in IAD score per day between both methods.ResultsForty-four patients were eligible and recruited (22 in HCM; 22 in SCM). Patients in both groups were comparable in age and gender. IAD Category 2 was more predominant in both methods. The most common location of IAD was at the perianal skin and diarrhea related to gastroenteritis was the most prevalent cause of IAD. More patients in the SCM group (n = 12; 54.5%) had their IAD healed within seven days compared to HCM, (n = 7; 31.8%) group. However, the average decrease in IAD scores per day for both methods were found to be similar.ConclusionHCM can be considered as a treatment of IAD along with the use of SCM. A skin care regimen should include effective cleansing, skin protection, and moisturization in IAD management.     

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.     

Effects of cycle periods and pressure amplitudes of alternating pressure on sacral skin blood flow responses

BackgroundThere are no guidelines on selecting alternating pressure (AP) configurations on increasing sacral skin blood flow (SBF).AimThe specific aims were to compare different cycle periods and pressure amplitudes of AP on sacral SBF responses in healthy people to establish the efficacy and safety of the protocols.MethodsTwo studies were tested, including the cycle period study (8 2.5-min vs 4 5-min protocols) and the pressure amplitude study (75/5 vs 65/15 mmHg protocols). Sacral SBF was measured using laser Doppler flowmetry (LDF) in 20 participants. AP loads were randomly applied using an indenter through the rigid LDF probe. Each protocol included a 10-min baseline, 20-min AP and 10-min recovery periods. A 30-min washout period was provided. The SBF response was normalized to the baseline SBF of each condition of each participant.ResultsFor the cycle period study, the 4 5-min cycle protocol partially restored more SBF than the 8 2.5-min cycle protocol at the low-pressure phase (0.87 ± 0.04 vs 0.71 ± 0.03, p < 0.05) and at the high-pressure phase (0.25 ± 0.03 vs 0.19 ± 0.03, p < 0.05). For the pressure amplitude study, the 75/5 mmHg protocol partially restored more sacral SBF than the 65/15 mmHg protocol at the low-pressure phase (0.87 ± 0.1 vs 0.25 ± 0.03, p < 0.05) but not at the high-pressure phase (0.23 ± 0.02 vs 0.21 ± 0.02, non-significant).ConclusionThis study demonstrated that 1) a cycle period of 5 min was better than 2.5 min and 2) a pressure amplitude of 75/5 mmHg was better than 65/15 mmHg. The finding provides insights for selecting the AP configurations for increasing SBF.     

Evaluation of pressure ulcer risk and development in operating rooms

AimThis study aimed to determine the risk and development of pressure ulcers in operating rooms.Materials and methodsThe sample of the study included a total of 250 patients. In the study, the risk of pressure ulcers was assessed before the operation, and the development of pressure ulcers was evaluated within 24 h after the operation.ResultsThe risk of pressure ulcers was low before the operation, and Stage I pressure ulcer developed in 12.8% of the patients within 24 h after the operation. The patients had pressure ulcers mostly in their sacrum. Their mean 3S Intraoperative Risk Assessment Scale of Pressure Sore score was 15.68 ± 4.84, suggesting that they were not at risk of developing pressure ulcers. Having a chronic disease (OR = 8.986; 95% CI = 3.697–21.845), undergoing general anesthesia (OR = 3.084; 95% CI = 1.323–7.194), and orthopedic surgery (OR = 10.172; 95% CI = 3.121–33.155) were statistically significant risk factors for pressure ulcers (p < 0.001). Additionally, moderately edematous skin (OR = 3.838; 95% CI = 1.024–14.386), overweight/underweight (OR = 16.333; 95% CI = 3.779–70.602), intraoperative bleeding greater than 800 ml (OR = 13.000; 95% CI = 3.451–48.969), operation time longer than 5 h (OR = 21.667; 95% CI = 2.122–221.223), moderate intraoperative stress (OR = 4.917; 95% CI = 0.425–56.916), body temperature higher than 38.3 °C or lower than 36.1 °C (OR = 5.462; 95% CI = 2.161–13.805), and intraoperative prone position (OR = 3.354; 95% CI = 1.386–8.115) were statistically significant risk factors for the development of pressure ulcers.ConclusionAccording to our preoperative pressure ulcer risk assessment, it is very important to take additional protective measures both during and after surgical operations to prevent pressure ulcers.     

“Doctor,how long will it take?” Results from an historical cohort on surgical pressure ulcer healing delay and related factors in persons with spinal cord injury

BackgroundFlap surgery for deep pelvic pressure ulcers has already shown its effectiveness. Most studies relating to the postoperative period assessed complications rates and associated risk factors, but none focused on delayed wound healing. The objective of this study was to describe wound healing delay after primary flap surgery in patients with spinal cord injury (SCI) and to assess associated risk factors.MethodsThis observational retrospective study based on medical charts included all persons with SCI operated for primary flap surgery for pelvic PU in the Hérault department of France between 2006 and 2014. Overall, 100 biomedical, psychological, socioeconomics and care management factors were studied. The primary outcome was wound healing delay, defined as time from surgery to complete cutaneous closure.Results85 patients were included. Median healing time was 48 days (R: 20–406). Healing rate was 70% at 3 months and 90% at 4 months. After a multivariate analysis three factors were significantly associated with delayed wound healing: duration of hospitalization in the acute care unit (HR = 2.68; p = 0.004), local post-operative complication (HR = 10.75; p = 0.02), and post-operative sepsis (HR = 2.18; p = 0.02).ConclusionAfter primary skin flap surgery for PU in persons with SCI, delayed wound healing is related to local or general complications as well as care management organization. The risk of delayed wound healing justifies the implementation of a coordinated pre-operative management to prevent complications and a structured care network for an earlier transfer to a SCI rehabilitation center.     

Associations between skin structural and functional changes after loading in healthy aged females at sacral and heel skin: A secondary data analysis

Aim of the studyMechanical loading causes skin occlusion and deformation, which influences structural and functional skin properties. Aims of the study were to measure structural and functional skin parameters after loading at the sacral and heel skin and to describe possible associations.Material and methodsA secondary data analysis based on a clinical trial with n = 15 aged women was conducted. Changes of transepidermal water loss, stratum corneum hydration, epidermal hydration, erythema, temperature, structural stiffness, elastic recovery, elastic function, and mean roughness after 120 min loading were described and compared. Spearman's rho (r_s) was used to estimate possible associations.ResultsLoading caused an increase of transepidermal water loss, stratum corneum and epidermal hydration, erythema and temperature at sacral and heel skin. There was a decrease of median roughness at the heel skin surface (-8.5 (IQR -10.5 to 5.5) μm). Strongest positive associations were observed between changes of elastic function and elastic recovery (r_s = 0.9 at heel and sacral skin) and between changes of epidermal and stratum corneum hydration at both skin areas (r_s = 0.7 at sacral skin and r_s = 0.5 at the heel).ConclusionTwo hours loading on a standard foam mattress leads to skin occlusion at the skin surface and mechanical deformation. Skin occlusion seems primarily to increase temperature, stratum corneum and epidermal hydration that may affect mechanical skin properties. Mechanical deformation seems to be responsible for the erythematous response of the dermal skin layer.     

Sacral interface pressure can be alleviated by repositioning with a small-angle change using an automated bed in patients with spinal cord injury

Aim of the studyThis study aimed to compare interface pressure and total contact area of the sacral region in different positions, including small-angle changes, in patients with spinal cord injury (SCI). Furthermore, we analyzed the clinical factors influencing pressure to identify the pressure injury (PI) high-risk group.Materials and methodsAn intervention was conducted for patients with paraplegia (n = 30) with SCI. In the first and second trials, interface pressure and total contact area of the sacral region were recorded from large- and small-angled positions using the automatic repositioning bed, which can change the angle of the back, lateral tilt, and knee.ResultsPositions with back raised ≥45° showed significantly higher pressure on the sacrum than most other positions. The pressure and contact area differences were statistically insignificant for combinations of small-angled changes <30°.Additionally, the duration of injury (β = 0.51, p = 0.010) and neurological level of injury (NLI) (β = −0.47, p = 0.020) were significant independent predictors of average pressure. Similarly, the duration of injury (β = 0.64, p = 0.001), the Korean version of the spinal cord independence measure-III (β = −0.52, p = 0.017), and body mass index (BMI; β = −0.34, p = 0.041) were significant independent predictors of peak pressure.ConclusionsFor repositioning, combinations of small-angle changes <30° effectively reduce pressure on the sacral region in patients with SCI. Lower BMI, longer duration of injury, lower functioning score, and NLI ≥ T7 are predictors of high sacral pressures, which increase the risk for PI. Therefore, patients with these predictors require strict management.     

Anti-inflammatory effect of pimecrolimus in the sodium lauryl sulphate test

Background Pimecrolimus is a calcineurin inhibitor used for the topical treatment of inflammatory skin diseases. We have shown previously that pimecrolimus cream is not effective on intact skin in the ultraviolet erythema test. Objective To test the anti‐inflammatory effect of pimecrolimus cream after damage of the skin barrier by sodium lauryl sulphate (SLS) in a randomised, placebo‐controlled, observer‐blinded study. Methods SLS (3% v/v) was applied under occlusion on the back of 36 healthy volunteers for 24 h. Subsequently, the test areas were treated for 24 h with pimecrolimus cream, 1% hydrocortisone in a hydrophilic ointment, and the vehicle alone over three consecutive days. One control area remained untreated. The erythema index and the transepidermal water loss (TEWL) served as readout parameters to assess the SLS‐induced skin irritation. Results Pimecrolimus cream and 1% hydrocortisone cream significantly reduced the SLS‐induced erythema. The two test preparations did not have a significant effect on the TEWL. Conclusion After damage to the skin barrier by SLS, pimecrolimus seems to penetrate into the skin as shown by a reduction of the irritation‐induced erythma. These data further support the notion that pimecrolimus is selectively effective in the treatment of skin disorders with an impaired function of the epidermal barrier.     

Comparison of interface pressures in two dynamic pressure ulcer prevention supports (NIMBUS 3 and SUMMIT): A randomized controlled trial

BackgroundPressure ulcers are a risk for bedridden patients and various supports exist to prevent them. The Pressure Relief Index (PRI) evaluates pressure relief of dynamic mattresses over time. This study compared the PRI of the SUMMIT mattress (AKS-France) and the NIMBUS 3 (HNE Medical).MethodsIn this non-blinded, randomized, crossover, non-inferiority study, patients aged ≥60 with a BMI of 16–35 kg/m2, predominantly confined to bed, able to walk with aid and with pelvic symmetry were recruited from a hospital rehabilitation department from March–April 2012. Exclusion criteria included past or present pressure ulcers, inability to remain supine and deep vein thrombosis. Peak pressures of the sacrum were recorded at 0.1 Hz during a single complete 10-min inflating cycle on both mattresses, with the order determined via electronic randomization allocation.ResultsThirty-one subjects were included and randomized; with 14 finally analyzed in the SUMMIT-NIBMUS 3 order group and 16 in the NIMBUS 3-SUMMIT group. The difference in PRI <30 mmHg between the two mattresses was 13.2% [0.3–26.1] (p < 0.05), allowing a non-inferiority - superiority switch. The SUMMIT mattress demonstrated a significantly higher percentage of time <30 mmHg (p = 0.0454). No significant difference in mean minimal pressure was seen (p = 0.3231) and mean maximal pressure was in favor of SUMMIT mattress (p = 0.0096). BMI did not affect pressure profile. There were no adverse events.ConclusionsEvaluated by the PRI, the SUMMIT mattress had a better interface pressure profile than the NIMBUS 3 in older patients. The PRI is a promising tool for clinical decision-making and research, warranting validation.     

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.     

Effects of topical application of 10,000 IU heparin on patients with perineal dermatitis and second-degree burns treated in a public pediatric hospital

BackgroundHigh-molecular-weight sodium heparin (10,000 IU) has been developed based on studies conducted on burn patients; it has anti-inflammatory, antigenic and anticoagulant properties.ObjectivesThe aim of this paper was to evaluate the effects of topical application of sodium heparin spray on two immunosuppressed patients (a child and a young person) with perineal dermatitis and an immunosuppressed child with second-degree burns.MethodsThis is a report of three clinical cases treated in a pediatric hospital. Sodium heparin spray (10,000 IU) was applied at a dose of 4200 IU per percentage of body surface area affected over the hyperemic region. Heparin spray treatment was discontinued after crust formation and wound reepithelialization; essential fatty acid was applied until spontaneous separation of the crust or total wound reepithelialization.ResultsHeparin spray had analgesic, angiogenic and anti-inflammatory effects, and did not require secondary wound closure. Pain control was of fundamental importance to the patients; in the three cases, improvement in analgesia was achieved within 24 h of treatment.ConclusionThe topical application of heparin spray in patients with perineal dermatitis or superficial second-degree burns demonstrated good tolerability, resulted in good aesthetic outcomes, and reduced pain.     

Improvement of local microcirculation through intermittent Negative Pressure Wound Therapy (NPWT)

BackgroundNegative Pressure Wound Therapy (NPWT) is widely used across different kinds of surgical disciplines. A controversial debate was raised by diverging results from studies that were conducted to examine the impact of NPWT on local perfusion. Thus, there is a lack of evidence for one important underlying factors that influences the physiology of wound healing under an applied NPWT-dressing.ObjectiveTo investigate the immediate local perfusion changes due to an applied intermittent NPWT protocol.Material and methodsA NPWT dressing was applied to the antero-lateral thigh of seven healthy volunteers with two probes of both pressure and microcirculatory measuring devices. One of each probe was placed under the NPWT dressing, the other one in close proximity next to it. A protocol consisting of two cycles of 10 min of −125 mmHg pressure, followed by 10 min of 0 mmHg pressure was applied. Measurements of local pressure to the underlying tissue, as well as microcirculatory changes were performed continuously.ResultsApplied vacuum caused compressional forces (27.33 mmHg, p < 0.05) towards the underlying tissue. Blood Flow was increased after both suction periods (+52.5%, +108.7%; p < 0.05) and continued increasing until the end of measurements (+145.3%). This was accompanied by significant increase in Oxygen Saturation (+21.6%; p < 0.05) and Relative Hemoglobin Content (+16.7%). Red Blood Cell Velocity was found to be increased without statistical significance. Next to the dressing, changes were also significant but less pronounced.ConclusionIntermittent NPWT improves local microcirculation with consecutive enhancement of oxygen supply.     

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.     

A comparison of air-cell and gel surgical table pads and an evaluation of the influence of pressure distribution and other factors on pressure injury prevention

Guidelines for pressure injury prevention consider the use of pressure-redistributing pads to prevent tissue deformation. However, limited research exists to assess the pressure distribution provided by the operating tables and the effectiveness of pressure-redistributing pads in preventing pressure injuries. In this study, we compared the pressure distribution properties of two surgical table pads and identified parameters influencing pressure injury outcomes after a lengthy surgical procedure. Twenty-seven patients undergoing left ventricular assist device implantation surgery participated in the study. Participants were randomly assigned to use either an air cell-based pad or a gel pad. Interface pressure was recorded during the surgery. We analyzed the effect of surgical table pad type, interface pressure distribution and pressure injury outcomes and analyzed what characteristics of the patients and the interface pressure are most influential for the development of pressure injuries. Comparing the interface pressure parameters between the air-cell group and the gel group, only the peak pressure index x time was significantly different (p < 0.05). We used univariate logistic regression analysis to identify significant predictors for the pressure injury outcome. The support surface was not significant. And, among patient characteristics, only age and BMI were significant (p ≤ 0.05). Among the interface pressure parameters, pressure density maxima, peak pressure index x time, and coefficient of variation were significant for pressure injury outcome (p ≤ 0.05). Peak pressure index, average pressure, and the surgery length were not statistically significant for pressure injury outcomes.     

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.     

Skin temperature and vascular attributes as early warning signs of pressure injury

ObjectivesThis study aimed to validate the skin temperature on sacral region and vascular attributes as early warning signs of pressure injury.MethodsTotally 415 patients admitted to the adult intensive care unit from August 2018 to April 2019 were prospectively screened. Daily blood pressure and blood glucose affecting vascular attributes and the relative skin temperature of sacral region were measured for 10 consecutive days. Collect the changes of these indicators during the occurrence of pressure injury. The optimal cut-off values of indicators were determined by X-tile analysis. The risk ratios of indicators associated with pressure injury were compared using the Cox proportional hazards regression model.ResultsThere were no obvious interactions among blood pressure, blood glucose and relative skin temperature (P > 0.05). The optimal cutoff value for above indicators was 63.5 mmHg, 9.9 mmol/L and −0.1 °C, respectively. The incidence of pressure injury peaked on the 4th and 5th day after hospitalization when categorizing the patients into low- and high-risk groups according to the cutoff values (P < 0.05). Based on relative skin temperature, patients in the high-risk group were more likely to develop pressure injury (hazard ratio = 6.36, 95% confidence interval = 3.91, 10.36), when compared to the other two indicators of blood pressure and blood glucose.ConclusionStringent skin temperature and vascular attributes measurements were necessary for preventing pressure injury. Nursing measures should be taken according to warning sings to reduce the incidence of pressure injury.     

Dermoscopic evaluation of erythema associated with pressure ulcers

Objective To assess dermoscopic findings of “non‐blanchable erythema” in stage I pressure ulcers and to determine their characteristics. Methods Dermoscopic examinations using DermLite^® II pro of redness over a bony prominence that did not resolve within 30 min of pressure relief or if a positional change was impossible for three days. Results Characteristic dermoscopic findings of redness in stage I pressure ulcers included petechial dots and telangiectatic streaks while other discolorations disappeared by diascopy. These dermoscopic features were seen in 9 of 10 cases. In one case, purpura that persisted under dermoscope compression was observed. Likewise, petechial dots and telangiectatic streaks were detected in three cases with redness surrounding stage II pressure ulcers. Conclusion The “non‐blanchable erythema” in pressure ulcers consists of petechial dots, telangiectatic streaks and purpura that persist after compression by the dermoscope and these characteristics are helpful for dermoscopically diagnosing pressure ulcers.