An ingenious deep learning approach for pressure injury depth evaluation with limited data.

BACKGROUND: The development of models using deep learning (DL) to assess pressure injuries from wound images has recently gained attention. Creating enough supervised data is important for improving performance but is time-consuming. Therefore, the development of models that can achieve high performance with limited supervised data is desirable. MATERIALS AND METHODS: This retrospective observational study utilized DL and included patients who received medical examinations for sacral pressure injuries between February 2017 and December 2021. Images were labeled according to the DESIGN-R® classification. Three artificial intelligence (AI) models for assessing pressure injury depth were created with a convolutional neural network (Categorical, Binary, and Combined classification models) and performance was compared among the models. RESULTS: A set of 414 pressure injury images in five depth stages (d0 to D4) were analyzed. The Combined classification model showed superior performance (F1-score, 0.868). The Categorical classification model frequently misclassified d1 and d2 as d0 (d0 Precision, 0.503), but showed high performance for D3 and D4 (F1-score, 0.986 and 0.966, respectively). The Binary classification model showed high performance in differentiating between d0 and d1-D4 (F1-score, 0.895); however, performance decreased with increasing number of evaluation steps. CONCLUSION: The Combined classification model displayed superior performance without increasing the supervised data, which can be attributed to use of the high-performance Binary classification model for initial d0 evaluation and subsequent use of the Categorical classification model with fewer evaluation steps. Understanding the unique characteristics of classification methods and deploying them appropriately can enhance AI model performance.

Volumetric Evaluation of Dead Space in Ischial Pressure Injuries Using Magnetic Resonance Imaging: A Case Series.

OBJECTIVE: To establish a preoperative evaluation procedure by measuring the volume of dead space using MRI in patients with ischial pressure injuries. METHODS: Patients with spinal cord injury and ischial pressure injuries who underwent treatment between August 2016 and November 2019 were included in the study. Preoperative MRI scan was conducted on all patients. The volume estimation and three-dimensional (3D) reconstruction were performed based on MRI data using a 3D Slicer. Based on the resulting volume, a muscle flap that could fit the dead space was selected. Surgery was performed with the selected muscle flap, and a fasciocutaneous flap was added, if necessary. RESULTS: A total of eight patients with ischial pressure injuries were included in the study. The mean patient age was 59.0 ± 11.0 years. The mean body mass index was 26.62 ± 3.89 kg/m2. The mean volume of dead space was 104.75 ± 81.05 cm3. The gracilis muscle was the most selected muscle flap and was used in four patients. In five of eight cases, a fasciocutaneous flap was used as well. The mean follow-up period was 16 months, and by that point, none of the patients evinced complications that required surgery. CONCLUSIONS: To the authors' knowledge, this is the first report on volumetric evaluation of dead space in ischial pressure injuries. The authors believe that the 3D reconstruction process would enable adequate dead space obliteration in ischial pressure injuries. The authors propose that preoperative MRI scans in patients with ischial pressure injury should become an essential part of the process.

The Shieh Score as a Risk Assessment Tool for Hospital-Acquired Pressure Injuries: A Retrospective Cohort Study.

OBJECTIVE: To design a new risk assessment tool to identify patients at high risk for hospital-acquired pressure injuries. METHODS: The researchers developed the Shieh Score using retrospective data of 406,032 hospital admissions from January 2014 to December 2016 with 1,299 pressure injury cases from the pressure injury registry. A decision tree and best subset logistic regression were used to select predictors from demographic and clinical candidate variables, which were then used to construct the Shieh Score. RESULTS: The final Shieh Score included the following measures: sex, age, diabetes, glomerular filtration rate, albumin level, level of function, use of IV norepinephrine, mechanical ventilation, and level of consciousness. The Shieh Score had a higher Youden Index, specificity, and positive predictive value than the Braden Scale. However, the Braden Scale had a higher sensitivity compared with the Shieh Score. CONCLUSIONS: The Shieh Score is an alternative risk assessment tool that may effectively identify a smaller number of patients at high risk for hospital-acquired pressure injuries with a higher specificity and positive predictive value than the Braden Scale.

A 10-Year Prevalence Survey and Clinical Features Analysis of Pressure Injury in a Tertiary Hospital in China, 2009-2018.

OBJECTIVE: To describe the 10-year prevalence of pressure injury (PI) in a tertiary hospital in China and determine the clinical characteristics of inpatients with PI. METHODS: The authors performed a retrospective analysis of PI cases extracted from the electronic health record of a tertiary hospital. The trend of PI prevalence over 10 years was described by estimating the average percent change (EAPC). Comorbidities were described with the Charlson Comorbidity Index (CCI). The clinical characteristics of PI were described using the number of cases and composition ratio. RESULTS: The overall prevalence of PI was 0.59% (5,838/986,404). From 2009 to 2018, the rate increased from 0.19% to 1.00% (EAPC = 22.46%). When stage I PIs were excluded, the prevalence of PI ranged from 0.15% to 0.79% (EAPC = 21.90%). The prevalence of hospital-acquired PI was 0.13%. Prevalence increased with age (Ptrend < .001) and was significantly higher in men than women (P < .001). Patients with PI were more widely distributed in the ICU (20.58%), vasculocardiology department (11.73%), gastroenterology department (10.18%), and OR (8.29%). Of patients with PI, 71.3% had a CCI score 4 or higher. CONCLUSIONS: The PI prevalence in the study facility increased rapidly over the study period. Pressure injuries among patients in the gastroenterology department and in the community deserve more attention. The CCI may be a good indicator for PI risk assessment.

Tissue temperature, flux and oxygen of sacral and trochanteric area under pressure of healthy subjects: A quasi-experimental study.

AIM: To evaluate the changes that take place in the perfusion, oxygenation and local temperature of the skin of the sacrum and trochanter when subjected to direct pressure for 2 h. METHODS: Quasi-experimental study in the preclinical phase with healthy subjects acting as their own controls (intrasubject control). The outcome variables were measured with a laser Doppler system (local temperature and oxygenation) and by near-infrared spectroscopy (perfusion). The pressure exerted was measured with a capacitive pressure sensor. No more than one week elapsed between the sacrum and trochanter measurements. RESULTS: The study sample consisted of 18 persons. The comparative analysis of the fluctuations in the parameters measured on the skin of the trochanters and sacrum, according to the time elapsed, revealed a statistically significant increase in temperature and in the pressure exerted. On the other hand, the changes in capillary blood flow and in SaO2 were not statistically significant. CONCLUSION: Our study results show that changes found in terms of temperature and pressure should be taking into account when planning personalised repositioning to patients according to biomechanical and biological situations that vary between anatomical areas. In future research, the changes reported could be evaluated in patients with risk factors for the development of pressure ulcers, thus facilitating the introduction of more personalised planning in the care and prevention of these injuries.

Prevalence and characteristics of older people with pressure ulcers and legs ulcers, in nursing homes in Barcelona.

BACKGROUND: Nursing home residents are vulnerable to chronic wounds. However, the prevalence data are scarce. AIM: The purpose of this study was to determine the prevalence of pressure ulcers and/or leg ulcers in nursing home residents, and describe the characteristics of the nursing homes, the residents and the wounds, as well as possible associations between these characteristics. METHODS: This was a cross-sectional survey of nursing home residents over the age of 65 in 168 facilities in Barcelona. Those presenting category II-IV pressure ulcers and/or leg ulcers were included. The data were collected by observation/examination. Descriptive, bivariate, and multivariate analyses were performed. RESULTS: The overall prevalence of pressure ulcers and leg ulcers combined was 4.4% (3.5% were pressure ulcers and 0.9% were leg ulcers). In small nursing homes with less nursing staff, the overall prevalence was greater than in large nursing homes (5.6% vs 3.8% [p = 0.01]). As expected, residents with pressure ulcers had higher pressure ulcer risk, worse dependence and cognitive status, urinary and faecal incontinence, and most were underweight. However, residents with leg ulcers had worse venous and arterial impairment and also were overweight. A multivariate analysis showed that pressure ulcers were statistically significantly associated with faecal incontinence (OR = 0.28, 95% CI = 0.09-0.81) and dyslipidaemia (OR = 0.21, 95% CI = 0.06-0.66), and leg ulcers were statistically significantly associated with venous insufficiency (OR = 4.93, 95% CI = 1.65-15.34). The characteristics of gluteal and ischial pressure ulcers, a high prevalence of infection, and a low reference to biofilm by nurses, in both types of wounds, suggest that these aspects are not adequately taken into account. CONCLUSIONS: Pressure ulcers and leg ulcers, mainly pressure ulcers, remain a public health problem in nursing homes. Further studies are required to confirm the associations found in this study.

Ultrasound assessment of deep tissue on the wound bed and periwound skin: A classification system using ultrasound images.

AIMS: Given the utility of ultrasonography in assessing pressure injury, some ultrasonographic findings have already been used as indicators of deep tissue pressure injury. Despite reports showing that a cloud-like ultrasonographic pattern reflected the presence of deep tissue necrosis, identifying cloud-like patterns was difficult given the presence of similar findings, such as a cobblestone-like pattern. This case series reports patients with pressure injuries who presented with a cloud-like (five cases) and cobblestone-like (four cases) pattern during ultrasonography. METHODS: This study was conducted at a Japanese university hospital. Participants included patients who underwent routine examination by an interdisciplinary pressure injury team. Pressure injury severity was assessed using the DESIGN-R® scoring system and the wound size were measured using ImageJ software based on the wound photograph. RESULTS: Among the five cases showing a cloud-like pattern upon ultrasonography, all exhibited an increase in the total DESIGN-R® score, while three exhibited an increase in wound size. On the other hand, all four cases showing a cobblestone-like pattern displayed no increase in the total DESIGN-R® score and a decrease in wound size. CONCLUSION: This study suggested that distinguishing between cloud-like and cobblestone-like ultrasonography patterns is necessary for determining the presence or absence of deep tissue pressure injury. In order to comprehensively assess pressure injuries with ultrasonography, future studies should be conducted in a large number of participants.

Unstageable Pressure Injuries: Identification, Treatment, and Outcomes Among Critical Care Patients.

Unstageable pressure injuries are widely understood to be full-thickness pressure injuries in which the base is obscured by slough and/or eschar. Correct identification of these pressure injuries can be challenging among health care professionals and, although treatments vary, débridement is key. Although the available research on unstageable pressure injuries is growing, there still is considerable need for advancements in the science regarding identification, treatment, and outcomes in critical care patients.

Incidence and Variables Predictive of Pressure Injuries in Patients Undergoing Ventricular Assist Device and Total Artificial Heart Surgeries: An 8-Year Retrospective Cohort Study.

OBJECTIVE: To investigate the incidence and risk factors of pressure injury (PI) development after ventricular assist device (VAD) or total artificial heart (TAH) surgery. METHODS: The investigator reviewed all VAD-TAH surgeries performed between 2010 and 2018 in a large academic health system. The PIs were reported by case incidence, patient incidence, and incidence density for each of the respective 1,000 patient days during the study period. Statistics on four different VAD-TAH devices were assessed; variables significant in bivariate analysis were entered into a stepwise logistic regression model to identify significant predictors of PI. RESULTS: The sample included 292 independent VAD-TAH surgeries among 265 patients. Thirty-two patients developed 45 PIs. The PI incidence was 11% (32/292), with a PI incidence per patient of 12% (32/265). Incidence density was 10 per 1,000 patient days (1%) for 2010-2012, 12 per 1,000 patient days (1.2%) for 2013-2015, and 10 per 920 patient days (1.1%) for 2016-2018. Logistic regression revealed that significant predictor variables for PI were age, mechanical ventilation time, and preoperative Braden Scale score. The mean time to PI was 23 days after admission and over 14 days after surgery, indicating a low rate of intraoperative and ICU-associated PI. CONCLUSIONS: The incidence of PI was lower than anticipated given historic rates. Potential mechanisms by which these patients were protected from PI are discussed. Prospective studies to further investigate significant risk factors and effective prevention measures are warranted.

Hospital-Acquired Pressure Injury Development Among Surgical Critical Care Patients Admitted With Community-Acquired Pressure Injury: A Retrospective Cohort Study.

PURPOSE: Community-acquired pressure injuries (CAPIs) are present among approximately 3% to 8% of patients admitted to acute care hospitals. In the critical care population, little is known about hospital-acquired pressure injury (HAPI) development among patients with CAPIs because most studies exclude patients with CAPIs. The purpose of our study was to determine the incidence of HAPI development and the associated risk factors among surgical critical care patients with CAPIs. DESIGN: Retrospective cohort study. SUBJECTS AND SETTING: We used electronic health record data from adult critical care patients admitted to the surgical and cardiovascular surgical intensive care units (ICUs) at a level 1 trauma center and academic medical center between 2014 and 2018. METHODS: Univariate analysis was used to compare patients with CAPIs who developed a HAPI and those who did not, as well as logistic regression analysis to identify independent risk factors for HAPIs among patients with CAPIs. RESULTS: Among 5101 patients admitted to 2 surgical critical care units, 167 (3%) patients were admitted with CAPIs. Hospital-acquired pressure injuries were 4 times more common among patients with CAPIs compared to patients without CAPIs. Among the 167 patients with CAPIs, 47 patients (28%) went on to also develop a HAPI, whereas in the 4934 patients without CAPIs, 352 patients (7%) went on to develop a HAPI. Findings from the multivariate logistic regression analysis (n = 151) showed that decreased serum albumin (odds ratio [OR] = 0.47; 95% confidence interval [CI], 0.25-0.85; P = .02) and excessively dry skin (OR = 2.6; 95% CI, 1.1-6.22; P = .03) were independent predictors of HAPI development among patients admitted with CAPIs. CONCLUSIONS: Results from our study show that patients with CAPIs are at high risk for developing a HAPI, particularly among patients with decreased serum albumin or excessively dry skin. Patients with excessively dry skin may benefit from the application of skin moisturizers.

Evaluation of a Modified Version of the Norton Scale for Use as a Pressure Injury Risk Assessment Instrument in Critical Care: A Quality Improvement Project.

PURPOSE: No risk assessment scale exists in the United States specifically designed for use among patients with critical illness. The aim of this project was to modify the Norton Scale for Pressure Sore Risk to improve its predictive power when used in the critical care setting. PARTICIPANTS AND SETTING: The setting for this quality improvement project was a 1157-bed academic medical center in the Southeast United States. Data were collected from 114 clinicians; 111 were critical care nurses and 3 were certified wound care nurses. METHODS: Participants assessed the pressure injury risks of a video-simulated critical care patient using the optimized Norton Scale (oNS); this instrument was modified from the Norton Scale. Data were collected on reliability, validity, usability, and preference. OUTCOMES: All 114 participants accurately predicted a patient's severe high risk for pressure injury using the oNS. Predictive validity and reliability of the oNS were excellent based on a correlation coefficient of more than 0.6 and a Cronbach α = 0.944, respectively. The intraclass correlation coefficient (ICC) was 0.933 (95% confidence interval, 0.911-0.950). From 71.2% to 84.9% of the participants agreed that the oNS represented the desired characteristics for optimal usability in the critical-care setting. Preference for the oNS was associated with perceptions that it was easier, quicker, and more critical-care-specific than the Braden Scale for Pressure Sore Risk currently used in critical care units in the project facility. IMPLICATIONS FOR PRACTICE: The oNS offered critical care nurses in our facility a quick, easy-to-use, critical care- specific risk assessment tool that focused on the unique vulnerabilities of patients with critical illness.

Pressure ulcer/injury classification today: An international perspective.

There has been an ongoing debate in the healthcare community about what pressure ulcers/injuries are, and how to name, define and classify them. The aim of this discussion paper is to provide a brief theoretical background about pressure ulcer/injury classification, to explain the approach the Guideline Governance Group has taken during the 2019 update of the International Guideline for 'Prevention and Treatment of Pressure Ulcers/Injuries' and to share views on how to best implement pressure ulcer/injury classification. First formal pressure ulcer/injury classifications were introduced in the 1950s and today various pressure ulcer/injury classification systems are used worldwide. Dissimilarities between commonly used classification systems may be considered a limitation that impedes clinical and scientific communication. However, the conceptual meaning of pressure ulcer/injury categories described within the various classification systems is comparable and the current evidence does not indicate that one classification is superior to another. Therefore, the Guideline Governance Group created a crosswalk of the major pressure ulcer/injury classifications in common use across different geographic regions. Clinicians are encouraged to use the classification system adopted by their healthcare setting in the most consistent way. The validity of pressure ulcer/injury classification is closely linked to its intended purpose. Studying measurement properties of pressure ulcer/injury classification systems must follow state-of-the-art methods. Structured educational interventions are helpful for improving diagnostic accuracy and reducing misclassification of pressure ulcers/injuries. Implementation of innovative skin and soft tissue assessments and revised pressure ulcer/injury classifications are only worth implementing, when the diagnostic information improves clinical care.

Assessing the Validity and Reliability of a New Pressure Ulcer Risk Assessment Scale for Patients in Intensive Care Units.

The high incidence of pressure ulcers/injuries (PU/Is) among patients in intensive care units (ICUs) suggests a need for improved risk assessment. PURPOSE: The study aimed to develop and assess the validity and reliability of a new PU/I risk assessment scale. METHODS: The authors developed the Efteli Günes (EFGU) Pressure Ulcer Risk Assessment Scale based on a conceptual framework of risk factors developed by Coleman et al. These factors comprised direct (immobility, skin/PU status, poor perfusion) and indirect (poor sensory perception and response, diabetes, moisture, poor nutrition, low albumin) factors, as well as factors that could potentially influence risk (older age, medications, pitting edema, chronic wound infection, acute illness, increased body temperature. These factors were operationalized into 8 scale variables: skin status in areas exposed to pressure, discomfort and pain sensation in areas exposed to pressure, incontinence, diastolic blood pressure, age, diabetes, ability to make small position shifts in areas exposed to pressure, and skin tolerance test. The presence and/or extent of each factor was assigned a value; the total score ranged from 0 to 15, with higher values indicating increased risk. Intraclass correlation (ICC) was used to assess interrater agreement. To test the instrument's validity and reliability, a prospective, methodological study was conducted from September 1, 2015 to November 1, 2016, in the Neurology, Internal Medicine, Neurosurgery, Orthopedics, and Traumatology ICUs of a university hospital in Turkey. Eligible participants had to be bedbound ICU patients at least 18 years old, without a PU/I on admission, not receiving inotropic and/or vasopressor medications, and with a minimum ICU stay of 6 days. Demographic and clinical data were collected upon admission and daily thereafter until ICU discharge (maximum stay 12 weeks) or death. Descriptive statistics and Student's t and chi-squared tests were used to analyze the data. Reliability was determined using Cronbach's alpha. The Kaiser-Meyer-Olkin coefficient was used to determine validity, and the diagnostic and Youden indices were used to establish the cutoff value for risk. RESULTS: Of the 207 patients included in this study 117 [56.5%] were male, mean age was 60.85 ± 16.45 years, the majority of participants (88 [42.5%]) were in the Neurology ICU), and 56 (27.1%) developed a PU/I. The presence of diabetes was found not to be a risk factor (r = 0.18), but the inability to make small position shifts (r = 0.79) was found to be a significant risk factor. After removing the diabetes variable (maximum score 14), 97.1% of patients with a score of 6 or greater on the EFGU scale score developed a PU/I. The Cronbach alpha coefficient for reliability was 0.81, sensitivity of the scale was 0.97, specificity was 0.83, positive predictive value was 0.69, and negative predictive value was 0.99. The ICC coefficient was 0.99. CONCLUSIONS: The validity and reliability of the EFGU Scale seem to indicate a high predictive value for PU/I occurrence among ICU patients involved in the study. Multicenter studies involving larger samples of ICU patients are needed to validate the results.

The mechanism of persistent undermining of a sacral pressure ulcer: Experimental analyses using a deformable model and examination of skin mobility over different anatomical locations.

Undermining is an important issue in the treatment and care of deep pressure ulcers. The frequency of the undermining over different bony prominences varies. In particular, deep pressure ulcers over the sacrum exhibit undermining more frequently than those occurring over the heel. Although shear force has been suggested as a critical factor in undermining, the exact mechanism remains unclear due to ethical and technical reasons in clinical practice. To clarify this issue, a deformable model was constructed to recreate the physical and morphological properties of a pressure ulcer with persistent undermining. The model was constructed using urethane to recreate the physical properties of a pressure ulcer. To examine the clinical relevance of the model, mechanical properties of the skin and the model were measured using a durometer. The model was further mounted onto a phantom that was laid on a bed. Backrest elevation of the bed induced deformities in the urethane model, suggesting a mechanism of persistent undermining of the sacral pressure ulcer. Moreover, a simple palpation examination in elderly volunteers revealed that the skin over the sacrum was more mobile than the skin over the heel. Therefore, persistent undermining is likely caused by specific external forces and the characteristic skin mobility of the sacral region. These two different factors explain the frequent undermining that occurs in sacral pressure ulcers.

Terminal Ulcers, SCALE, Skin Failure, and Unavoidable Pressure Injuries: Results of the 2019 Terminology Survey.

GENERAL PURPOSE: To present the results of the 2019 study of healthcare professionals' consensus and opinions regarding terminology for terminal ulcers, Skin Changes At Life's End, skin failure, and unavoidable pressure injuries to improve clinical care and to foster research into current criteria for unavoidable skin changes at the end of life. TARGET AUDIENCE: This continuing education activity is intended for physicians, physician assistants, NPs, and nurses with an interest in skin and wound care. LEARNING OBJECTIVES/OUTCOMES: After completing this continuing education activity, the participant should be better able to:1. Explain the survey methodology and identify the consensus statements.2. Synthesize the open-ended questions and respondent comments and their implications for clinical care and research. ABSTRACT: This article reports the results of a global wound care community survey on Kennedy terminal ulcers, Skin Changes At Life's End, Trombley-Brennan terminal tissue injuries, skin failure, and unavoidable pressure injury terminology. The survey consisted of 10 respondent-ranked statements to determine their level of agreement. There were 505 respondents documented. Each statement required 80% of respondents to agree (either "strongly agree" or "somewhat agree") for the statement to reach consensus. Nine of the 10 statements reached consensus. Comments from two additional open-ended questions were grouped by theme. Conclusions and suggested recommendations for next steps are discussed. This summary is designed to improve clinical care and foster research into current criteria for unavoidable skin changes at the end of life.

This article reports the results of a global wound care community survey on Kennedy terminal ulcers, Skin Changes At Life's End, Trombley-Brennan terminal tissue injuries, skin failure, and unavoidable pressure injury terminology. The survey consisted of 10 respondent-ranked statements to determine their level of agreement. There were 505 respondents documented. Each statement required 80% of respondents to agree (either "strongly agree" or "somewhat agree") for the statement to reach consensus. Nine of the 10 statements reached consensus. Comments from two additional open-ended questions were grouped by theme. Conclusions and suggested recommendations for next steps are discussed. This summary is designed to improve clinical care and foster research into current criteria for unavoidable skin changes at the end of life.

Time-to-treatment is a risk factor for the development of pressure ulcers in elderly patients with fractures of the pelvis and acetabulum.

INTRODUCTION: Fractures of the pelvis and acetabulum are associated with pain and immobilization and, hence, pose the risk of developing a pressure ulcer - especially in elderly patients. In the literature, information on risk factors for the occurrence of pressure ulcers related to geriatric pelvic or acetabulum fractures is missing. METHODS: Consecutive in-hospital patients aged 55 years or older treated for closed pelvis and/or acetabulum fractures between 2013 and 2017 were retrospectively identified from an institutional prospective database. Epidemiologic characteristics and patient specifics with special focus on the time from admission to treatment, duration of hospitalization and comorbidities were retrospectively assessed by chart review. RESULTS: During the evaluated interval, 407 patients with isolated fractures of the pelvis or acetabulum (mean age 78 years, range 55 to 101 years, 69,3% female) were treated. A new pressure ulcer that developed during the hospitalization was observed in 46/407 patients (11.3%). This included pressure ulcers of stage 1 in 18/46 cases (39%), stage 2 in 24/46 cases (52%), and stage 3 in 4/46 cases (9%). No stage 4 ulcers were seen in this cohort. The mean duration of hospitalization was longer in patients with a pressure ulcer (25 days, SD 17) than in patients with no ulcers (12 days, SD 9; p < .001). Patients who developed a pressure ulcer, had waited significantly longer for treatment of their pelvis/acetabulum fracture when compared to patients without an ulcer (5 days, SD 5 vs. 3 days SD 4, p = =.001). A logistic regression analysis confirmed "time to treatment" as an independent risk factor for the occurrence of a pressure ulcer during hospitalization. In an analysis adjusted for the confounders age, male gender, diabetes and malignancy, the odds ratio to develop a pressure ulcer remained 1.10 (CI 1.03 to 1.19; c-value = 0.774, p = .008) for each day of waiting treatment. CONCLUSION: "Time to treatment" is an independent risk factor for the occurrence of a pressure ulcer during hospitalization after a pelvis/acetabulum fracture in elderly patients. Each day of waiting treatment increases the risk of developing a pressure ulcer by 10%.

Evaluation of infrared technology to detect category I and suspected deep tissue injury in hospitalised patients.

OBJECTIVE: To evaluate the use of an infrared thermography device in assessing skin temperature among category I pressure ulcer (PU) and/or suspected deep tissue injuries (SDTI) with intact skin. METHODS: An observational cross-sectional study design was used. Adult inpatients (cases) who had a category I PU or suspected deep tissue injury (skin intact) on the sacral or heel during the study period (March to April 2018) were recruited. Patients without a PU were also recruited to act as control. Thermal images of the patient's PU site and non-PU site were taken within 24 hours of PU occurrence. Thermal images of the control patients (no PU) were also taken. Each PU case was matched to three control patients in terms of age, gender, race and anatomical sites. All thermal images were taken using a portable CAT S60 Thermal Imaging Rugged Smartphone (Caterpillar Inc., US) that provided readings of the skin temperature in degrees Celsius. RESULTS: A total of 17 cases and 51 controls were recruited. Among the cases, the mean difference in skin temperature between the PU site (mean: 31.14°C; standard deviation [SD]: 1.54) and control site within the cases (mean: 28.93°C; SD: 3.47) was significant (difference: 2.21±3.66°C; p=0·024). When comparing between all cases and controls, the mean temperature difference was non-significant. When comparing between the category I PU and suspected deep pressure injury cases, the mean difference was also non-significant. CONCLUSION: Using infrared thermography technology at the bedside to measure skin temperature will support the clinical diagnosis of patients with skin types I to III. However, there is a need for a more accurate and objective measurement to identify and diagnose early category I PU or suspected deep tissue injury in adult patients with darker skin types 4 and above, enabling early initiation of preventive measures in the hospital acute care setting.

A retrospective analysis of recurrent pressure ulcer in a burn center in Northeast China.

AIM: A retrospective analysis for the pressure ulcer in our burns center in northeast China was taken in order to find the prognostic factors for ulcer recurrence. MATERIALS AND METHODS: We collected the clinical data of hospitalized patients with pressure ulcer ranging from September 2013 to September 2018 involving initial hospitalized data, follow up visit data and recurrent hospitalized data, further univariable and multivariable Cox regression analysis were taken for searching the prognostic factors of recurrent ulcer. RESULTS: The recurrent rate was 8.02%, and in the result of univariable and multivariable Cox regression analysis, blood albumin level on admission below 25 g/dl contributed to the strongest predicting factor for recurrence, with HR = 32.745(95%CI = 8.061-133.022, P < 0.001). Multiple ulcers showed the second significant importance for predicting recurrence, with HR = 24.226(95%CI = 3.855-152.231, P = 0.001 < 0.05). Single caregiver contributed to the third prognostic factor, with HR = 0.016(95%CI = 0.004-0.076, P < 0.001). CONCLUSION: In a conclusion, multiple ulcers, blood albumin level below 25 g/dl on admission and single caregiver were the three prognostic factors for recurrent pressure ulcer and the shortages of medical care out of hospital in northeast China need more attention urgently. Flap treatment may not be a protective factor for ulcer recurrence, but considered the advantages on the closure of deep wounds, it was still an effective treatment for pressure ulcer nowadays.