Physiological measurements of facial skin response under personal protective equipment

Decreasing Intraoperative Skin Damage in Prone-Position Surgeries

OBJECTIVE

To determine if subepidermal moisture (SEM) measures help detect and prevent intraoperative acquired pressure injuries (IAPIs) for prone-position surgery.

METHODS

In this clinical trial of patients (n = 39 preintervention, n = 48 intervention, 100 historical control) undergoing prone-position surgery, researchers examined the use of multidimensionally flexible silicone foam (MFSF) dressings applied preoperatively to patients' face, chest, and iliac crests. Visual skin assessments and SEM measures were obtained preoperatively, postoperatively, and daily for up to 5 days or until discharge. Electronic health record review included demographic, medical, and surgery data.

RESULTS

Of the 187 total participants, 76 (41%) were women. Participants' mean age was 61.0 ± 15.0 years, and 9.6% were Hispanic (n = 18), 9.6% were Asian (n = 18), 6.9% were Black or African American (n = 13), and 73.8% were White (n = 138). Participants had a mean Scott-Triggers IAPI risk score of 1.5 ± 1.1. Among those with no erythema preoperatively, fewer intervention participants exhibited postoperative erythema on their face and chest than did preintervention participants. Further, fewer intervention participants had SEM-defined IAPIs at all locations in comparison with preintervention participants. The MFSF dressings overcame IAPI risk factors of surgery length, skin tone, and body mass index with fewer IAPIs in intervention participants.

CONCLUSIONS

Patients undergoing prone-position surgeries developed fewer IAPIs, and SEM measures indicated no damage when MFSF dressings were applied to sites preoperatively. The SEM measures detected more damage than visual assessment.

Smartphone-based detection of COVID-19 and associated pneumonia using thermal imaging and a transfer learning algorithm

COVID-19-related pneumonia is typically diagnosed using chest x-ray or computed tomography images. However, these techniques can only be used in hospitals. In contrast, thermal cameras are portable, inexpensive devices that can be connected to smartphones. Thus, they can be used to detect and monitor medical conditions outside hospitals. Herein, a smartphone-based application using thermal images of a human back was developed for COVID-19 detection. Image analysis using a deep learning algorithm revealed a sensitivity and specificity of 88.7% and 92.3%, respectively. The findings support the future use of noninvasive thermal imaging in primary screening for COVID-19 and associated pneumonia.

Hill CA. Use of Elastomeric Half-Mask Respirator in the Clinical Care Environment: Health Care Worker Perceptions

BACKGROUND

Elastomeric half-mask respirators (EHMR) reduce health care workers' exposure to airborne hazards including bioaerosols but have primarily been used in the industrial setting.

PURPOSE

To assess health care workers' perceptions, attitudes, and experiences wearing EHMRs in a clinical environment.

METHODS

Employees within a single health care system who wore the EHMR continuously during their shift completed an investigator developed survey. Descriptive statistics and thematic analysis were used.

RESULTS

Of the 8273 EHMR "fit-tested" eligible employees, 1478 met inclusion criteria and participated. Respondents reported that they felt well protected with the EHMR and confident in their care and maintenance of the EHMR. Although skin changes developed, they were primarily managed by adjusting the straps. Clarity of communication was a concern across all respondents and disciplines.

CONCLUSIONS

The EHMR was preferred over reusing the N95 although clarity in communication was challenging.

Evaluation of dressings preventing facial medical device-related pressure injury in medical staff during the COVID-19 pandemic: A systematic review and network meta-analysis

AIM

This study systematically compared the efficacy of various dressings that may prevent facial medical device-related pressure injury (MRDPI) in medical staff during the COVID-19 pandemic.

BACKGROUND

During the COVID-19 pandemic, medical staff who are required to wear masks, goggles and other personal protective equipment (PPE) are susceptible to facial MRDPI, which exacerbates working conditions. Dressings can effectively prevent or alleviate MRDPI, but it is unclear which dressings are most effective.

DESIGN

A systematic review and network meta-analysis, in accordance with PRISMA.

METHODS

A comprehensive literature search was conducted in four English and four Chinese databases to identify relevant studies published up to 8 September 2022. The selected studies were randomised controlled trials, with populations comprising medical staff who wore PPE during the COVID-19 pandemic and included an observation and control group.

RESULTS

The network meta-analysis of the 12 selected articles showed that foam dressing, hydrocolloid dressing and petrolatum gauze were better than conventional protection for preventing MRDPI. The surface under the cumulative ranking curve indicated that foam dressing was the best preventative.

CONCLUSION

Foam dressing is more effective than other dressings in preventing facial MRDPI in medical staff. When PPE must be worn for many hours, such as during the COVID-19 pandemic, medical staff can use foam dressings to prevent MRDPI.

RELEVANCE TO CLINICAL PRACTICE

The results support the use of dressings, especially foam dressings, to prevent MRDPI in healthcare workers. The appropriate dressings are recommended to prevent MRDPI associated with wearing PPE.

Prevention of skin damages related to personal protective equipment among healthcare workers: Summary of best-evidence practiced strategies

AIM

To conduct a quality evaluation of the literature for the prevention of skin damage caused by personal protective equipment among healthcare workers and to summarise the best-evidence practice strategies to prevent it.

DESIGN

Review.

METHODS

Two researchers retrieved the literature from Web of Science, Public Medicine, etc., from the establishment of the database until 24 June 2022. Appraisal of Guidelines, Research and Evaluation II was used to assess the methodological quality of the guidelines. Expert consensus was assessed by the 2016 version of the Australian Joanna Briggs Institute Evidence-based Health Care Center corresponding evaluation standards. By tracking the original study, the quality of practice recommendations and best-practice evidence information sheets were evaluated by the 2016 version of the Australian Joanna Briggs Institute Evidence-based Health Care Center corresponding evaluation standards. The classification of evidence and recommendation level adopted the 2014 version of the Australian Joanna Briggs Institute evidence pre-grading and recommending level system.

RESULTS

A total of 5476 studies were retrieved after duplications were eliminated. After the quality evaluation, 10 qualified studies were finally included. All consisted of two guidelines, one best practice information sheet, five practice recommendations, and one expert consensus. The evaluation results of the guidelines were both B-level recommendations. The consistency strength of expert consensus was moderate (Cohen's kappa coefficient = .571). Thirty best-evidence practised strategies were compiled for four elements, including cleaning, moisturising, prophylactic dressings and others.

CONCLUSION

Our study evaluated the quality of the included studies and summarised the preventive measures of PPE-related skin lesions according to the recommendation level. The main preventive measures were divided into 4 parts and 30 items. However, the associated literature was rare, and the quality was slightly low. More high-quality research is needed to focus on healthcare workers' health and not just skin in the future.

Characterisation of superficial corneocytes in skin areas of the face exposed to prolonged usage of respirators by healthcare professionals during COVID-19 pandemic

INTRODUCTION

During the COVID-19 pandemic healthcare workers (HCWs) have used respiratory protective equipment for prolonged periods, which has been associated with detrimental effects on the underlying skin. The present study aims to evaluate changes in the main cells (corneocytes) of the stratum corneum (SC) following prolonged and consecutive use of respirators.

METHODS

17 HCWs who wore respirators daily during routine hospital practice were recruited to a longitudinal cohort study. Corneocytes were collected via tape stripping from a negative control site (area outside the respirator) and from the cheek which was in contact with the device. Corneocytes were sampled on three occasions and analysed for the level of positive-involucrin cornified envelopes (CEs) and the amount of desmoglein-1 (Dsg1), as indirect measurements of immature CEs and corneodesmosomes (CDs), respectively. These were compared to biophysical measurements (Transepidermal water loss, TEWL, and SC hydration) at the same investigation sites.

RESULTS

A large degree of inter-subject variability was observed, with maximum coefficients of variation of 43% and 30% for the level of immature CEs and Dsg1, respectively. Although it was observed that there was not an effect of prolonged respirator usage on the properties of corneocytes, the level of CDs was greater at the cheek than the negative control site (p < 0.05). Furthermore, low levels of immature CEs correlated with greater TEWL values after prolonged respirator application (p < 0.01). It was also noted that a smaller proportion of immature CEs and CDs was associated with a reduced incidence of self-reported skin adverse reactions (p < 0.001).

CONCLUSIONS

This is the first study that investigated changes in corneocyte properties in the context of prolonged mechanical loading following respirator application. Although differences were not recorded over time, the levels of CDs and immature CEs were consistently higher in the loaded cheek compared to the negative control site and were positively correlated with a greater number of self-reported skin adverse reactions. Further studies are required to evaluate the role of corneocyte characteristics in the evaluation of both healthy and damaged skin sites.

Influencing factors of medical device-related pressure ulcers in medical personnel during the COVID-19 pandemic: A systematic review and meta-analysis

OBJECTIVE

To determine the influencing factors of medical device related pressure injury (MDRPU) in medical staff by meta-analysis.

METHODS

A comprehensive literature search was conducted by PubMed, Embase, Cochrane Library, Web of Science, CNKI, VIP, CBM, and WanFang Data (from inception to July 27, 2022). Two researchers independently performed literature screening, quality evaluation and data extraction, and meta-analysis was conducted with RevMan 5.4 and Stata12.0 software.

RESULTS

Total of 11215 medical staff were included in 9 articles. Meta analysis showed that gender, occupation, sweating, wearing time, single working time, department of COVID-19, preventive measures, and level 3 PPE were the risk factors for MDRPU in medical staff (P < 0.05).

CONCLUSION

The outbreak of COVID-19 led to the occurrence of MDRPU among medical staff, and the influencing factors should be focused on. The medical administrator can further improve and standardize the preventive measures of MDRPU according to the influencing factors. Medical staff should accurately identify high-risk factors in the clinical work process, implement intervention measures, and reduce the incidence of MDRPU.

Biophysical and biochemical changes in skin health of healthcare professionals using respirators during COVID-19 pandemic

BACKGROUND

Personal protective equipment, including respirator devices, has been used to protect healthcare workers (HCWs) during the COVID-19 pandemic. These are fitted to skin sites on the face to prevent airborne transmission but have resulted in reports of discomfort and adverse skin reactions from their continued usage. The present study addresses the objective changes in both the structural integrity and biological response of the skin following prolonged and consecutive use of respirators.

MATERIALS AND METHODS

A longitudinal cohort study, involving 17 HCWs who wear respirators daily, was designed. Changes in the barrier properties and biological response of the skin were assessed at three facial anatomical sites, namely, the nasal bridge, left cheek and at a location outside the perimeter of respirator. Assessments were made on three different sessions corresponding to the first, second and third consecutive days of mask usage. Skin parameters included transepidermal water loss (TEWL), stratum corneum (SC) hydration and erythema, as well as cytokine biomarkers sampled from sebum using a commercial tape.

RESULTS

The cheek and the site outside the perimeter covered by the respirator presented minimal changes in skin parameters. By contrast, significant increases in both the TEWL (up to 4.8 fold) and SC hydration (up to 2.7 fold) were detected at the nasal bridge on the second consecutive day of respirator-wearing. There was a high degree of variation in the individual expression of pro-and anti-inflammatory cytokines. Increasing trends in nasal bridge TEWL values were associated with the body mass index (p < 0.05).

CONCLUSIONS

The most sensitive objective parameter in detecting changes in the skin barrier proved to be the increase in TEWL at the nasal bridge, particularly on the second day of consecutive respirator usage. By contrast, other measures of skin were less able to detect remarkable variations in the barrier integrity. Consideration for protecting skin health is required for frontline workers, who continue to wear respirators for prolonged periods over consecutive days during the pandemic.

Impact of prolonged PPE use on Canadian health professionals

AIM

To explore the impact that prolonged use of personal protective equipment (PPE) has on the skin integrity of Canadian health professionals.

METHOD

A descriptive, pan-Canadian, cross-sectional, online survey was carried out to explore the type and prevalence of PPE-related skin injury among Canadian health professionals. Convenience sampling was used to disseminate the online survey link to health professionals.

RESULTS

There were responses from 757 health professionals. Masks worn included surgical masks (90%), a combination of surgical or N95/KN95 masks (7.7%) and an N95/KN95 mask alone (2.7%). Responses showed 84.6% of providers always wear a mask while at work with 38.5% wearing the same mask all shift; 90% of participants wore protective eye wear. Complications included soreness or pressure injuries behind the ears (70%), new or worsening acne (52%), a runny nose or sneezing (45%), itching (39%), and dry skin (37%). Hand issues included dry skin (53%), red skin (30%), itching (26%), broken skin (20%), rash (16%), and dermatitis (11%) - 51% of respondents did not moisturise their hands. Complications related to gown use included itching (6%), moisture-associated skin damage (5.5%), feeling claustrophobic (4.5%), and new or worsening acne (3%). Increased perspiration due to PPE was experienced in 87.5% of respondents. Some 43% of respondents noted their mental health became worse due to wearing PPE for prolonged periods.

CONCLUSION

These findings should be used in the development of guidelines to prevent and manage PPE-related skin injuries among health professionals. Education for professionals should focus on skin protection, prevention of PPE-related skin complications and support for mental health issues.

Biomechanical and Physiological Evaluation of Respiratory Protective Equipment Application

Purpose

Respiratory protective equipment is widely used in healthcare settings to protect clinicians whilst treating patients with COVID-19. However, their generic designs do not accommodate the variability in face shape across genders and ethnicities. Accordingly, they are regularly overtightened to compensate for a poor fit. The present study aims at investigating the biomechanical and thermal loads during respirator application and the associated changes in local skin physiology at the skin–device interface.

Materials and Methods

Sixteen healthy volunteers were recruited and reflected a range of gender, ethnicities and facial anthropometrics. Four single-use respirators were evaluated representing different geometries, size and material interfaces. Participants were asked to wear each respirator in a random order while a series of measurements were recorded, including interface pressure, temperature and relative humidity. Measures of transepidermal water loss and skin hydration were assessed pre- and post-respirator application, and after 20 minutes of recovery. Statistical analysis assessed differences between respirator designs and associations between demographics, interface conditions and parameters of skin health.

Results

Results showed a statistically significant negative correlation (p < 0.05) between the alar width and interface pressures at the nasal bridge, for three of the respirator designs. The nasal bridge site also corresponded to the highest pressures for all respirator designs. Temperature and humidity significantly increased (p < 0.05) during each respirator application. Significant increases in transepidermal water loss values (p < 0.05) were observed after the application of the respirators in females, which were most apparent at the nasal bridge.

Conclusion

The results revealed that specific facial features affected the distribution of interface pressures and depending on the respirator design and material, changes in skin barrier function were evident. The development of respirator designs that accommodate a diverse range of face shapes and protect the end users from skin damage are required to support the long-term use of these devices.

Protective equipment-related pressure ulcers in healthcare workers during COVID-19 pandemic: A systematic review

AIM

This systematic review was carried out to examine pressure ulcers in healthcare staff due to the use of protective equipment during COVID-19 pandemic and the precautions taken to prevent these injuries.

METHOD

Relevant studies were retrospectively searched. Seven English keywords identified from MESH were used while searching. The search was carried out in five international databases by trying various combinations of these words during February 15-25, 2021. This systematic review was updated by rescanning databases on December 20, 2021 and a total of 611 studies were attained.

RESULTS

17 studies which met the study inclusion criteria, which were conducted mostly through online survey method in different study designs and which included a total of 24,889 healthcare professionals were examined. The incidence of PPE-related pressure ulcers was found to be between 30% and 92.8%. Grade I pressure ulcers were the most common (44.1%-82%). The incidence of skin problems except PPE-related pressure ulcers such as itching, redness and dry skin was found to be between 42.8-88.1%. Risk factors that frequently played a role in the development of PPE-related pressure ulcers and other skin problems were longer use of PPE and sweating. PPE-related pressure ulcers and other skin problems were more frequent over the nose (nasal bone/nasal bridge), ears, forehead and cheeks. PPE-related itching, redness and dry skin mostly occurred. Several dressing applications were found to be effective in the prevention of PPE-related pressure ulcers and other skin problems that might develop especially on the facial region.

CONCLUSION

PPE-related pressure ulcers and other skin problems were found to be higher among healthcare professionals. Data regarding the sealing of dressing applications against viral transmission in the prevention of PPE-related pressure ulcers and other skin problems are limited. It is estimated that future studies will be performed to prevent device-related pressure ulcers in healthcare workers. It is suggested that there is a need to conduct studies with larger samples where expert researchers make observations for pressure ulcers in order to determine the prevalence and incidence of PPE-related pressure ulcers.

Alternatives and preferences for materials in use for pressure ulcer prevention: An experiment-reinforced literature review

Alleviation of localised, sustained tissue loads and microclimate management are the most critical performance criteria for materials in use for pressure ulcer prevention, such as in prophylactic dressings, padding or cushioning. These material performance criteria can be evaluated by calculating the extents of matching between the material stiffness (elastic modulus) and the thermal conductivity of the protective dressing, padding or cushioning with the corresponding properties of native skin, separately or in combination. Based on these bioengineering performance criteria, hydrocolloids, which are commonly used for prophylaxis of medical device-related pressure ulcers, exhibit poor stiffness matching with skin. In addition, there is remarkable variability in the modulus and thermal conductivity matching levels of different material types used for pressure ulcer prevention, however, it appears that among the materials tested, hydrogels provide the optimal matching with skin, followed by gels and silicone foams. The stiffness matching for hydrocolloids appears to be inferior even to that of gauze. This article provides quantitative performance criteria and metrics for these evaluations, and grades commonly used material types to biomechanically guide clinicians and industry with regards to the selection of dressings for pressure ulcer prevention, both due to bodyweight forces and as a result of applied medical devices.

Skin-related problems associated with the use of personal protective equipment among health care workers during the COVID-19 pandemic: A online survey study

Aim

The aim of this study was to determine the skin-related problems caused by personal protective equipment (PPE) use in health care workers (HCWs) and to identify the factors contributing to their occurrence.

Materials and Methods

This descriptive and cross-sectional online survey study was carried out with 297 HCWs working in a university hospital in Turkey between March 20, 2021, and May 20, 2021. The study data was collected using an online questionnaire consisting of 3 parts. Descriptive statistics, Pearson's Chi-square, and Fisher's Exact Chi-square tests were used to analyze the data.

Results

Among the HCWs, 95.6% reported that skin-related problems associated with at least one PPE use. Skin-related problems that develop due to PPE use were mostly associated with the use of Surgical/N95 masks (97.1%) and gloves (96.8%). The most commonly reported problems were ''dryness'' (%74.0) and ''itching'' (%72.1) when wearing gloves, ''perspiration and moisture'' (73.6%), ''formation of equipment traces'' (53.9%), and ''skin lesions'' (52.8%) when wearing a surgical/N95 mask, ''perspiration and moisture'' (89.7%) when wearing protective overalls/gowns. Wearing PPE for more than 4h (p=0.001), taking additional precautions to increase the sense of protection (p=0.026), and not applying preventive measures while using PPE (p=0.003) significantly increase the risk of skin-related problems.

Conclusion

The results suggest that skin-related problems due to the use of PPE are common among HCWs.

Infection Prevention Mask Consisting of Nanofiber Filter and Habutae Silk Fabrics

To reduce skin irritation and allergic symptoms caused by long-term mask use, we produced a mask with a filter effect by laminating nanofibers on habutae silk fabric, a specialty of Japan's Fukui Prefecture, using the electrospinning method. We investigated the filter characteristics of silk fabrics with different weave structures (habutae, flat crepe, and twill). We found that woven fabrics alone could not sufficiently block particles finer than 1 μm, even when the fabric layers were overlapped. Therefore, we had a nanofiber filter layer fabricated on the surface of habutae fabric by the electrospinning method at a weight of 1 g/m2. The nanofibers removed more than 94% of 0.3 μm-particles, which are similar to the size of virus particles. However, the nanofiber layer was so dense that it caused an increase in pressure drop, so we made the nanofiber layer thinner and fabricated the filter on the surface of the habutae fabric at 0.5 g/m2. A three-dimensional mask consisting of two woven fabrics, one with a nanofiber layer on the inside and the other with a normal woven fabric without a nanofiber layer on the outside, was fabricated and tested on 95 subjects. The subjects reported that the nanofiber habutae masks were more comfortable than nonwoven masks. Moreover, the silk woven masks did not cause allergic symptoms such as skin irritation.