How is life support withdrawn in intensive care units: A narrative review

Evidence Guiding Withdrawal of Mechanical Ventilation at the End of Life: A Review

OBJECTIVE

Distress at the end of life in the intensive care unit (ICU) is common. We reviewed the evidence guiding symptom assessment, withdrawal of mechanical ventilation (WMV) process, support for the ICU team, and symptom management among adults, and specifically older adults, at end of life in the ICU.

SETTING AND DESIGN

Systematic search of published literature (January 1990-December 2021) pertaining to WMV at end of life among adults in the ICU setting using PubMed, Embase, and Web of Science. Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines were followed.

PARTICIPANTS

Adults (age 18 and over) undergoing WMV in the ICU.

MEASUREMENTS

Study quality was assessed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach.

RESULTS

Out of 574 articles screened, 130 underwent full text review, and 74 were reviewed and assessed for quality. The highest quality studies pertained to use of validated symptom scales during WMV. Studies of the WMV process itself were generally lower quality. Support for the ICU team best occurs via structured communication and social supports. Dyspnea is the most distressing symptom, and while high quality evidence supports the use of opiates, there is limited evidence to guide implementation of their use for specific patients.

CONCLUSION

High quality studies support some practices in palliative WMV, while gaps in evidence remain for the WMV process, supporting the ICU team, and medical management of distress. Future studies should rigorously compare WMV processes and symptom management to reduce distress at end of life.

Predicting Time to Death After Withdrawal of Life-Sustaining Measures Using Vital Sign Variability: Derivation and Validation

To develop a predictive model using vital sign (heart rate and arterial blood pressure) variability to predict time to death after withdrawal of life-supporting measures.

Hastening Death in Canadian ICUs: End-of-Life Care in the Era of Medical Assistance in Dying

OBJECTIVES

Since 2016, Canada has allowed for euthanasia based on strict criteria under federal medical assistance in dying legislation. The purpose of this study was to determine how Canadian intensivists perceive medical assistance in dying and whether they believe their approach to withdrawal of life-sustaining therapies has changed following introduction of medical assistance in dying.

DESIGN

Electronic survey.

SETTING

Participants were recruited from 11 PICU programs and 14 adult ICU programs across Canada. All program leaders for whom contact information was available were approached for participation.

PARTICIPANTS

We invited intensivists and critical care trainees employed between December 2019 and May 2020 to participate using a snowball sampling technique in which department leaders distributed study information. All responses were anonymous. Quantitative data were analyzed using descriptive statistics. Categorical variables were analyzed using Pearson chi-square test.

INTERVENTIONS

Not applicable.

MEASUREMENTS AND MAIN RESULTS

We obtained 150 complete questionnaires (33% response rate), of which 50% were adult practitioners and 50% pediatric. Most were from academic centers (81%, n = 121). Of respondents, 86% (n = 130) were familiar with medical assistance in dying legislation, 71% in favor, 14% conflicted, and 11% opposed. Only 5% (n = 8) thought it had influenced their approach to withdrawal of life-sustaining therapies. Half of participants had no standardized protocol for withdrawal of life-sustaining therapies in their unit, and 41% (n = 62) had observed medications given in disproportionately high doses during withdrawal of life-sustaining therapies, with 13% having personally administered such doses. Most (80%, n = 120) had experienced explicit requests from families to hasten death, and almost half (47%, n = 70) believed it was ethically permissible to intentionally hasten death following withdrawal of life-sustaining therapies.

CONCLUSIONS

Most Canadian intensivists surveyed do not think that medical assistance in dying has changed their approach to end of life in the ICU. A significant minority are ethically conflicted about the current approach to assisted dying/euthanasia in Canada. Almost half believe it is ethical to intentionally hasten death during withdrawal of life-sustaining therapies if death is expected.

Improving quality of withdrawal of life-sustaining measures in organ donation: a framework and implementation toolkit

BACKGROUND

Donation after circulatory determination of death (DCD) is responsible for the largest increase in deceased donation over the past decade. When the Canadian DCD guideline was published in 2006, it included recommendations to create standard policies and procedures for withdrawal of life-sustaining measures (WLSM) as well as quality assurance frameworks for this practice. In 2016, the Canadian Critical Care Society produced a guideline for WLSM that requires modifications to facilitate implementation when DCD is part of the end-of-life care plan.

METHODS

A pan-Canadian multidisciplinary collaborative was convened to examine the existing guideline framework and to create tools to put the existing guideline into practice in centres that practice DCD.

RESULTS

A set of guiding principles for implementation of the guideline in DCD practice were produced using an iterative, consensus-based approach followed by development of four implementation tools and three quality assurance and audit tools.

CONCLUSIONS

The tools developed will aid DCD centres in fulsomely adapting the Canadian Critical Care Society Withdrawal of Life-Sustaining Measures guideline.

Withholding and withdrawal of life-sustaining treatments in intensive care units in Lebanon: a cross-sectional survey of intensivists and interviews of professional societies, legal and religious leaders

Background

Little is known about the attitudes and practices of intensivists working in Lebanon regarding withholding and withdrawing life-sustaining treatments (LSTs). The objectives of the study were to assess the points of view and practices of intensivists in Lebanon along with the opinions of medical, legal and religious leaders regarding withholding withdrawal of life-sustaining treatments in Lebanese intensive care units (ICU).

Methods

A web-based survey was conducted among intensivists working in Lebanese adult ICUs. Interviews were also done with Lebanese medical, legal and religious leaders.

Results

Of the 229 survey recipients, 83 intensivists completed it, i.e. a response rate of (36.3%). Most respondents were between 30 and 49 years old (72%), Catholic Christians (60%), anesthesiologists (63%), working in Beirut (47%). Ninety-two percent of them were familiar with the withholding and withdrawal concepts and 80% applied them. Poor prognosis of the acute and chronic disease and futile therapy were the main reasons to consider withholding and withdrawal of treatments. Ninety-five percent of intensivists agreed with the “Principle of Double Effect” (i.e. adding analgesia and or sedation to patients after the withholding/withdrawal decisions in order to prevent their suffering and allow their comfort, even though it might hasten the dying process). The main withheld therapies were vasopressors, respiratory assistance and CPR. Most of the respondents reported the decision was often to always multidisciplinary (92%), involving the family (68%), and the patient (65%), or his advance directives (77%) or his surrogate (81%) and the nurses (78%). The interviewees agreed there was a law governing withholding and withdrawal decisions/practices in Lebanon. Christians and Muslim Sunni leaders declared accepting those practices (withholding or withdrawing LSTs from patients when appropriate).

Conclusion

Withholding and withdrawal of LSTs in the ICU are known concepts among intensivists working in Lebanon and are being practiced. Our results could be used to inform and optimize therapeutic limitation in ICUs in the country.

Comparison of End-of-Life Care Practices Between Children With Complex Chronic Conditions and Neonates Dying in an ICU Versus Non-ICUs: A Substudy of the Pediatric End-of-LIfe CAre Needs in Switzerland (PELICAN) Project

OBJECTIVES

To describe and compare characteristics of care provided at the end of life for children with chronic complex conditions and neonates who died in an ICU with those who died outside an ICU.

DESIGN

Substudy of a nation-wide retrospective chart review.

SETTING

Thirteen hospitals, including 14 pediatric and neonatal ICUs, two long-term institutions, and 10 community-based organizations in the three language regions of Switzerland.

PATIENTS

One hundred forty-nine children (0-18 yr) who died in the years 2011 or 2012. Causes of death were related to cardiac, neurologic, oncological, or neonatal conditions.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Demographic and clinical characteristics, therapeutic procedures, circumstances of death, and patterns of decisional processes were extracted from the medical charts. Ninety-three (62%) neonates (median age, 4 d) and children (median age, 23 mo) died in ICU, and 56 (38%) with a median age of 63 months outside ICU. Generally, ICU patients had more therapeutic and invasive procedures, compared with non-ICU patients. Changes in treatment plan in the last 4 weeks of life, such as do-not-resuscitate orders occurred in 40% of ICU patients and 25% of non-ICU patients (p < 0.001). In the ICU, when decision to withdraw life-sustaining treatment was made, time to death in children and newborns was 4:25 and 3:00, respectively. In institutions where it was available, involvement of specialized pediatric palliative care services was recorded in 15 ICU patients (43%) and in 18 non-ICU patients (78%) (p = 0.008).

CONCLUSIONS

This nation-wide study demonstrated that patients with a complex chronic condition who die in ICU, compared with those who die outside ICU, are characterized by fast changing care situations, including when to withdraw life-sustaining treatment. This highlights the importance of early effective communication and shared decision making among clinicians and families.

Incidence and Risk Model Development for Severe Tachypnea Following Terminal Extubation

BACKGROUND

Palliative ventilator withdrawal (PVW) in the ICU is a common occurrence.

RESEARCH QUESTION

The goal of this study was to measure the rate of severe tachypnea as a proxy for dyspnea and to identify characteristics associated with episodes of tachypnea.

STUDY DESIGN AND METHODS

This study assessed a retrospective cohort of ICU patients from 2008 to 2012 mechanically ventilated at a single academic medical center who underwent PVW. The primary outcome of at least one episode of severe tachypnea (respiratory rate > 30 breaths/min) within 6 h after PVW was measured by using detailed physiologic and medical record data. Multivariable logistic regression was used to examine the association between patient and treatment characteristics with the occurrence of a severe episode of tachypnea post extubation.

RESULTS

Among 822 patients undergoing PVW, 19% and 30% had an episode of severe tachypnea during the 1-h and 6-h postextubation period, respectively. Within 1 h postextubation, patients with the following characteristics were more likely to experience tachypnea: no pre-extubation opiates (adjusted OR [aOR], 2.08; 95% CI, 1.03-4.19), lung injury (aOR, 3.33; 95% CI, 2.19-5.04), Glasgow Coma Scale score > 8 (aOR, 2.21; 95% CI, 1.30-3.77), and no postextubation opiates (aOR, 1.90; 95% CI, 1.19-3.00).

INTERPRETATION

Up to one-third of ICU patients undergoing PVW experience severe tachypnea. Administration of pre-extubation opiates (anticipatory dosing) represents a key modifiable factor that may reduce poor symptom control.

Withdrawal of life-sustaining therapy

PURPOSE OF REVIEW

The aim of this review is to examine literature relating to the withdrawal of life-sustaining therapy (WLST).

RECENT FINDINGS

Discussions regarding end-of-life issues in adults and children are not occurring comprehensively. Discussions relating to the WLST in the pediatric population varies by institution and may vary by race, age, health insurance, diagnosis, and severity of illness. Completing advance directives prior to placement of life-sustaining treatments is not consistent practice. With the WLST, differences in perspectives exist between medical specialties, within one specialty at different levels of training, and in physicians' ethical and psychological responses to the WLST. The timing of WLST appears to be influenced by ICU strain and communication issues. Study outcomes differ regarding the functionally favorable survival of patients who have had WLST. Universal guidelines for the WLST may not address individual patient circumstances.

SUMMARY

Discussions of end-of-life issues early in the course of a patient's health care will contribute to the healthcare team's understanding and respect of the patient's wishes. This article addresses the withdrawal of left ventricular assist devices; attending physicians and physicians in training perspectives of WLST; do physicians distinguish between withholding and WLST; the timing of WLST; guidelines for the process of WLST; and pediatrics and end-of-life decisions.

Care management in amyotrophic lateral sclerosis

Amyotrophic lateral sclerosis (ALS) is a relentlessly progressive and fatal neurodegenerative disease characterized by progressive weakness of voluntary muscles of movement as well as those for swallowing, speech and respiration. In the absence of curative treatment, care can improve quality of life, prolong survival, and support ALS patients and their families, and also help them to anticipate and prepare for the end of life. Multidisciplinary management in tertiary centers is recommended in close collaboration with general practitioners, home carers and a dedicated health network. Patients' follow-up deals mainly with motor impairment and physical disability, adaptation, nutrition and respiratory function. Involvement of palliative care as part of the multidisciplinary team management offers patients the possibility of discussing their end of life issues. This review summarizes the different aspects of ALS care, from delivering the diagnosis to the end of life, and the organization of its management.