Dynamic change and risk factors of intense thirst in patients admitted to neuro-intensive care unit: An observational study.

Background: Thirst is a clinical discomfort symptom reported by most patients admitted to intensive care unit (ICU). Little is known about the dynamic change and risk factors of intense thirst in neuro-intensive care unit (Neuro-ICU).

Aim: The objective of this study was to explore the dynamic change and determine the risk factors of intense thirst in patients admitted to Neuro-ICU, providing reference for personalized interventions of intense thirst.

Study design: The study design is a prospective observational study. Demographic and disease-related, treatment, physiological and biochemical data were collected for 230 patients from Neuro-ICU of a hospital from May 2023 to November 2023. We assessed thirst intensity on numeric rating scale (NRS) of 0-10 (10 = worst possible thirst) at eight time points: 7:00, 9:00, 11:00, 13:00, 15:00, 17:00, 19:00 and 21:00 and a self-designed general information questionnaire based on safety protocol for thirst management to analyse the risk factors of intense thirst in Neuro-ICU patients. If thirst scores were more than 7, we defined it as intense thirst. This study followed the STROBE checklist for cross-sectional studies.

Results: A total of 230 Neuro-ICU patients were observed. The dynamic analysis results showed an overall downward trend in thirst intensity, with the highest NRS thirst scores at 07:00 (6.13 ± 2.14) and the lowest at 21:00 (4.02 ± 2.72). The investigation of the current situation showed that the incidence of intense thirst in Neuro-ICU patients was 47.4%. Intense thirst in Neuro-ICU patients was predicted by dysphagia (odds ratio [OR] = 1.436, 95% confidence interval [CI]:1.063-1.941), open mouth breathing (OR = 2.201, 95% CI:1.041-4.656), high glucose (OR = 2.584, 95% CI:1.097-6.087), xerostomia (OR = 3.049, 95% CI:1.950-4.767) (all p < .05).

Conclusion: The intensity of thirst was dynamically changing and the incidence of intense thirst in Neuro-ICU patients was relatively high. Timely assessment of Neuro-ICU patients' thirst severity and identification of those at high risk can ensure the implementation of effective interventions based on patients' characteristics.

Relevance to clinical practice: Thirst is a pervasive distressing symptom often reported by critically ill patients. This study revealed that the clinical nurses need to enhance their focus on dynamic change of thirst, which is helpful for improving the efficiency of bundled thirst interventions at the suitable time.