The paradox of obesity in pressure ulcers of critically ill patients

Associations between body mass index and interface pressure after 3 h loading in healthy adults

AIM OF THE STUDY

The purpose of this study was to determine the associations between body mass index and interface pressure after 3 h loading in healthy adults and to establish a foundation for the development of interventions tailored to body mass index.

MATERIAL AND METHODS

A secondary data analysis based on a clinical trial involving 75 adults was conducted. Data were analyzed using descriptive statistics, repeated measure ANOVA, and ANCOVA. The statistics program IBM SPSS Statistics 27.0 was used for data analysis.

RESULTS

Loading caused a significant increase in average pressure in the obesity group compared to the underweight group. There was a significant increase in risk area ratio calculated based on 30 mmHg and 45 mmHg in both obesity and overweight groups compared to the underweight group. On both support surfaces, average pressure, peak pressure, and risk area ratio were higher in the obese group compared to the normal weight group. However, these differences were not statistically significant.

CONCLUSION

Given the emphasized risk of pressure injuries, long-term observation of body mass index-specific changes in interface pressure can provide crucial evidence for pressure injury prevention nursing. The results of this study suggest the need to implement pressure injury prevention interventions that consider the pressure characteristics according to BMI.

Exploring body morphology, sacral skin microclimate and pressure injury development and risk among patients admitted to an intensive care unit: A prospective, observational study

OBJECTIVE

To determine the association between body morphology, sacral skin microclimate and their impact on the development and risk of pressure injuries among patients in an intensive care unit.

METHODOLOGY

A prospective observational exploratory study was conducted over 30 weeks. Repeat study observations occurred multiple times a week for 28 days or until discharge. Participant inclusion criteria were ≥ 18 years of age, expected intensive care length of stay > 24 h and intact skin over the sacrum region.

SETTING

The study was conducted in a 36-bed intensive care unit of a major metropolitan public hospital in Queensland, Australia.

OUTCOME MEASURES

Pressure injuries were staged and independently verified according to the international pressure injury classification system. Pressure injury risk was determined by the Braden scale score and subepidermal oedema, using a subepidermal moisture scanner at the sacrum.

RESULTS

Of the 93 participants recruited, an inverted triangle body shape (p =.049), a BMI > 25 kg/m2 (p =.008), a standard foam mattress type (p =.017) and increased length of stay (p <.001) were associated with an increased pressure injury risk according to subepidermal oedema. Participants with increased sacral skin temperature (p <.001), mechanical ventilation (p <.001), vasoactive drugs administered (p =.003), increased sequential organ failure assessment score (p =.047), neurovascular diagnosis (p =.031) and increased length of stay (p =.027) were associated with increased pressure injury risk according to the Braden scale score.

CONCLUSION

Body morphology and skin microclimate are associated with pressure injury risk during critical illness.

IMPLICATIONS FOR CLINICAL PRACTICE

Subepidermal oedema was associated with a patient's shape, body mass index and mattress type, factors that directly influence the pressure loading and the skin, whereas the Braden scale was associated with sacral temperature and clinical measures of critical illness. Consideration of body morphology and skin microclimate in pressure injury risk assessment could lead to more specific prevention strategies targeting high risk patients.

Characteristics of United States nursing homes with high percentages of stage 2-4 pressure injuries among high-risk nursing home residents with obesity

Obesity rates in nursing homes (NHs) are increasing. Residents with obesity are at risk for poor outcomes such as pressure injuries (PIs) due to special care needs such as bariatric medical equipment and special protocols for skin care. PIs among resident populations is a sign of poor quality NH care. The purpose of this retrospective observational study was to identify characteristics of NHs with high rates of stage 2-4 PIs among their high-risk residents with obesity. Resident assessment data were aggregated to the NH level. NH structure and process of care and antecedent conditions of the residents and environment measures were used in bivariate comparisons and multivariate logistic regression models to identify associations with NHs having high rates of stage 2-4 PIs among high-risk residents with obesity. We identified three characteristics for which the effect on the odds was at least 10% for clinical significance - for-profit status, large facilities, and the hours of certified nursing assistants (CNAs) per patient day (HRPPD). This study identified several NH characteristics that are associated with higher risk for PIs, which can be targeted with evidence-based interventions to reduce the risk of these adverse safety events occurring.