A critical assessment of early warning score records in 168,000 patients

The national early warning score (NEWS) is recommended to detect deterioration in hospitalised patients. In 2013, a NEWS-based system was introduced in a hospital service with over 250,000 annual admissions, generating large amounts of NEWS data. The quality of such data has not been described. We critically assessed NEWS data recorded over 12 months. This observational study included NEWS records from adult inpatients hospitalized in the Capital Region of Denmark during 2014. Physiological variables and the use of supplementary oxygen (NEWS variables) were recorded. We identified implausible records and assessed the distributions of NEWS variable values. Of 2,835,331 NEWS records, 271,103 (10%) were incomplete with one or more variable missing and 0.2% of records containing implausible values. Digit preferences were identified for respiratory rate, supplementation oxygen flow, pulse rate, and systolic blood pressure. There was an accumulation of pulse rate records below 91 beats per minute. Among complete NEWS records, 64% had NEWS?≥?1; 29% had NEWS?≥?3; and 8% had NEWS?≥?6. In a large set of NEWS data, 10% of the records were incomplete. In a system where data were manually entered into an electronic medical record, digit preferences and the accumulation of pulse rate records below 91 beats per minute, which is the limit for NEWS point generation, showed that staff practice influenced the recorded values. This indicates a potential limitation of transferability of research results obtained in such systems to fully automated systems.     

The effect of diaries written by relatives for intensive care patients on posttraumatic stress (DRIP study): protocol for a randomized controlled trial and mixed methods study

Background

Critically ill patients and their relatives have complex needs for support during their stay in the intensive care unit (ICU) and the post-ICU rehabilitation period. Diaries written by nurses have proven beneficial for patients and relatives, preventing post-traumatic stress, anxiety and depression and helping patients and families find meaning. Actively involving relatives in writing a diary for critically ill patients is a new approach to helping relatives and patients cope; however, research is limited.The aim of this study is to test the hypothesis that a diary written by a close relative of a critically ill patient will reduce the risk of developing symptoms of post-traumatic stress disorder (PTSD) in the patient and relatives at 3 months post-ICU. Furthermore, the aim is to explore the perceptions and use of the diary and describe the diary content and structure.

Method

The intervention consists of a hard-cover notebook that will be given to a close relative to write a diary for the critically ill patient while in the ICU. Guidance will be offered by ICU nurses on how to author the diary. The effect of the intervention will be tested in a two-arm, single-blind, randomized controlled trial, which aims to include 100 patient/relative pairs in each group. The primary outcome studied is symptoms of post-traumatic stress (PTSS-14). Secondary outcomes are scores on anxiety and depression (HADS) and the Medical Outcomes Study Questionnaire Short Form 36 (SF-36). The narrative structure and content of the diary as well as its use will be explored in two qualitative studies.

Discussion

The results of this study will inform ICU nurses about the effects, strengths and limitations of prompting relatives to author a diary for the patient. This will allow the diary intervention to be tailored to the individual needs of patients and relatives.

Trial registration

NCT02357680. Registered September 3, 2015.

     

Ferumoxytol Is Not Retained in Kidney Allografts in Patients Undergoing Acute Rejection

Purpose

To evaluate whether ultrasmall superparamagnetic iron oxide nanoparticle (USPIO)-enhanced magnetic resonance imaging (MRI) can detect allograft rejection in pediatric kidney transplant patients.

Procedures

The USPIO ferumoxytol has a long blood half-life and is phagocytosed by macrophages. In an IRB-approved single-center prospective clinical trial, 26 pediatric patients and adolescents (age 10–26 years) with acute allograft rejection (n = 5), non-rejecting allografts (n = 13), and normal native kidneys (n = 8) underwent multi-echo T2* fast spoiled gradient-echo (FSPGR) MRI after intravenous injection (p.i.) of 5 mg Fe/kg ferumoxytol. T2* relaxation times at 4 h p.i. (perfusion phase) and more than 20 h p.i. (macrophage phase) were compared with biopsy results. The presence of rejection was assessed using the Banff criteria, and the prevalence of macrophages on CD163 immunostains was determined based on a semi-quantitative scoring system. MRI and histology data were compared among patient groups using t tests, analysis of variance, and regression analyses with a significance threshold of p < 0.05.

Results

At 4 h p.i., mean T2* values were 6.6 ± 1.5 ms for native kidneys and 3.9 ms for one allograft undergoing acute immune rejection. Surprisingly, at 20–24 h p.i., one rejecting allograft showed significantly prolonged T2* relaxation times (37.0 ms) compared to native kidneys (6.3 ± 1.7 ms) and non-rejecting allografts (7.6 ± 0.1 ms). Likewise, three additional rejecting allografts showed significantly prolonged T2* relaxation times compared to non-rejecting allografts at later post-contrast time points, 25–97 h p.i. (p = 0.008). Histological analysis revealed edema and compressed microvessels in biopsies of rejecting allografts. Allografts with and without rejection showed insignificant differences in macrophage content on histopathology (p = 0.44).

Conclusion

After ferumoxytol administration, renal allografts undergoing acute rejection show prolonged T2* values compared to non-rejecting allografts. Since histology revealed no significant differences in macrophage content, the increasing T2* value is likely due to the combined effect of reduced perfusion and increased edema in rejecting allografts.