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Title: Sacral Skin Temperature and Pressure Ulcer Development: A Descriptive Study.
Author: Yilmaz İ, Günes ÜY.
Journal: Wound Manag Prev; 2019 Aug; 65(8):30-37. PubMed ID: 31373568.
Abstract:
UNLABELLED: Existing evidence is inadequate to assume increased skin temperature is a risk factor for the development of pressure ulcers (PUs). PURPOSE: The purpose of this prospective, descriptive study was to examine the relationship between sacral skin temperature and PU development. METHODS: Using convenience sampling methods, patients who were hospitalized in the tertiary intensive care unit (ICU) of the internal medicine department of a university hospital in İzmir, Turkey, between April and December 2015 were eligible to participate if they were ⟩18 years of age, had an expected hospital stay of at least 5 days, a Braden score ≤12, and were admitted without a PU. Demographic and clinical data collected included age, gender, body mass index, diagnosis, mattress type, length of follow-up (days), systolic and diastolic blood pressure, body temperature, hemoglobin level, sacral skin temperatures in the supine and lateral positions, room temperature, PU stage and duration, and Braden score. Temperature was measured the day of hospitalization as a baseline measurement (day 1) and once every day thereafter up to 22 days, until the patient did or did not develop a PU, died, was no longer undergoing position change, or was discharged. Sacral skin temperature was taken immediately after the patient was moved to a lateral position following 120 minutes of supine position (referred to as supine position sacral skin temperature measurement) and after 30 minutes in lateral position (referred to as lateral position sacral skin temperature measurement). Data were collected using paper-and-pencil questionnaires and entered into a software program for analysis. Descriptive statistics, Student's t test, one-way analysis of variance test, Pearson product-moment correlation analysis, and Spearman's rank-order correlation analysis were used for data analysis. RESULTS: Of the 37 patients who met the inclusion criteria and were monitored for at least 5 days, 21 (56.8%) developed PUs. No statistically significant difference in supine position sacral skin temperature on day 1 or day 5 was found between patients who did and did not develop a PU (36.90° C ± 0.29° C and 37.15° C ± 0.53° C, respectively, on day 1; t = -1.656, P = .112; and 37.37° C ± 0.53° C and 37.30° C ± 0.79° C, respectively, on day 5; t = 0.259, P = .798). Day 5 lateral position skin temperatures also did not differ significantly between the 2 groups (37.44° C ± 0.44° C and 37.31° C ± 0.75° C, respectively; t = 1.306, P = .621). A statistically significant difference was noted between mean sacral skin temperature in the supine position among patients ages 75 to 90 years compared with patients 38 to 64 years and 65 to 74 years (36.93° C ± 0.39° C; F = 13.221, P = .000) and with use of a viscoelastic mattress compared with an alternating pressure air mattress and continuous lateral rotation alternating pressure air mattress (37.85° C ± 0.54° C; F = 14.039, P = .000). No statistically significant differences in sacral skin temperatures were found for any of the of the other variables assessed. CONCLUSION: Sacral skin temperatures were not statistically different between ICU patients who did and did not develop a PU. Additional research may help increase understanding of the relationship between skin temperature and PU development.

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