Impact of delirium on decision-making capacity after hematopoietic stem-cell transplantation

Delirium in Children Undergoing Hematopoietic Cell Transplantation: A Multi-Institutional Point Prevalence Study

Introduction: Delirium occurs frequently in adults undergoing hematopoietic cell transplantation, with significant associated morbidity. Little is known about the burden of delirium in children in the peri-transplant period. This study was designed to determine delirium rates, define risk factors (demographic and treatment related), and establish feasibility of multi-institutional bedside screening for delirium in children undergoing hematopoietic cell transplant. Methods: This is a multi-institutional point prevalence study. All subjects were prospectively screened for delirium twice daily using the Cornell Assessment of Pediatric Delirium over a 10-day period. De-identified data, including basic demographics and daily characteristics, were extracted from the electronic medical record. Results: Eleven North American institutions were included, 106 children were enrolled, and 883 hospital days were captured. Delirium screening was successfully completed on more than 98% of the study days. Forty-eight children (45%) developed delirium over the course of the 10-day study. Children were diagnosed with delirium on 161/883 study days, for an overall delirium rate of 18% per day. Higher delirium rates were noted in children <5 years old (aOR 0.41 for children over 5 years), and in association with specific medications (melatonin, steroids, and tacrolimus). Conclusion: Delirium was a frequent occurrence in our study cohort, with identifiable risk factors. Delirium screening is highly feasible in the pediatric hematopoietic cell transplant patient population. A large-scale prospective longitudinal study following children throughout their transplant course is urgently needed to fully describe the epidemiology of pediatric delirium, explore the effects of delirium on patient outcomes, and establish guidelines to prevent and treat delirium in the peri-transplant period.

Documentation of Capacity Assessment and Subsequent Consent in Patients Identified With Delirium

BACKGROUND

Delirium is highly prevalent in the general hospital patient population, characterized by acute onset, fluctuating levels of consciousness, and global impairment of cognitive functioning. Mental capacity, its assessment and subsequent consent are therefore prominent within this cohort, yet under-explored.

AIM

This study of patients with delirium sought to determine the processes by which consent to medical treatment was attempted, how capacity was assessed, and any subsequent actions thereafter.

METHOD

A retrospective documentation review of patients identified as having a delirium for the twelve months February 2013 to January 2014 was undertaken. Inclusion and exclusion criteria were used; demographic and descriptive data collected. A total of n=1153 patients were identified with n=310 meeting inclusion criteria.

RESULT

A random sample of one hundred patients were subsequently reviewed. One third of patients (n=33) had documentation relating to consent, while four patients had documentation relating to capacity. Median delirium duration was three days, with treatment refusal occurring in twenty-two patients and "duty of care" being used as an apparent beneficent related treatment framework in twelve patients.

CONCLUSIONS

While impaired decision-making was indicated, the review was unable to indicate what patient characteristics flag the need for capacity assessment. Documentation relating to consent processes (whether patient or substitute) appeared deficient for this cohort.

Ethical challenges and solutions regarding delirium studies in palliative care

CONTEXT

Delirium occurs commonly in settings of palliative care (PC), in which patient vulnerability in the unique context of end-of-life care and delirium-associated impairment of decision-making capacity may together present many ethical challenges.

OBJECTIVES

Based on deliberations at the Studies to Understand Delirium in Palliative Care Settings (SUNDIPS) meeting and an associated literature review, this article discusses ethical issues central to the conduct of research on delirious PC patients.

METHODS

Together with an analysis of the ethical deliberations at the SUNDIPS meeting, we conducted a narrative literature review by key words searching of relevant databases and a subsequent hand search of initially identified articles. We also reviewed statements of relevance to delirium research in major national and international ethics guidelines.

RESULTS

Key issues identified include the inclusion of PC patients in delirium research, capacity determination, and the mandate to respect patient autonomy and ensure maintenance of patient dignity. Proposed solutions include designing informed consent statements that are clear, concise, and free of complex phraseology; use of concise, yet accurate, capacity assessment instruments with a minimally burdensome schedule; and use of PC friendly consent models, such as facilitated, deferred, experienced, advance, and proxy models.

CONCLUSION

Delirium research in PC patients must meet the common standards for such research in any setting. Certain features unique to PC establish a need for extra diligence in meeting these standards and the employment of assessments, consent procedures, and patient-family interactions that are clearly grounded on the tenets of PC.