Propofol in terminal care

Successful Use of Propofol After Failed Palliative Sedation in Patients With Refractory Symptoms

Context: Propofol is a general anesthetic used in multiple clinical scenarios. Despite growing evidence supporting its use in palliative care, propofol is rarely used in palliative sedation. Reluctance toward the adoption of propofol as a sedative agent is often associated with fear of adverse events such as respiratory arrest. Objectives: We aimed to describe efficacy and safety of palliative sedation in refractory sedation with propofol using a protocol based on low, incremental dosing. Methods: A retrospective observational study featuring inpatients receiving sedative treatment with propofol in our palliative care unit in Madrid (Spain) between March 1, 2018 and February 28, 2023, following a newly developed protocol. Results: During the study period, 22 patients underwent sedation with propofol. Propofol was used successfully to control different refractory symptoms, mainly psychoexistential suffering and delirium. All patients had undergone previous failed attempts at sedation with other medications (midazolam or lemovepromazine) and presented risk factors for complicated sedation. All patients achieved satisfactory (profound) levels of sedation measured with the Ramsay Sedation Scale, but total doses varied greatly between patients. Most patients (17, 77%) received combined therapy with propofol and other sedative medications to harness synergies. The median time between start of sedation with propofol and death was 26.0 hours. No cases of apnea or death during induction were recorded. Conclusion: A protocol for palliative sedation with propofol based on low, incremental dosing, with the option of administering an initial induction bolus, shows excellent results regarding adequate levels of sedation, without observing apnea or respiratory depression. Our results promote the use of propofol to achieve palliative sedation in patients with refractory symptoms and risk factors for complicated sedation at the end of life.

General anaesthesia in end-of-life care: extending the indications for anaesthesia beyond surgery

In this article, we describe an extension of general anaesthesia – beyond facilitating surgery – to the relief of suffering during dying. Some refractory symptoms at the end of life (pain, delirium, distress, dyspnoea) might be managed by analgesia, but in high doses, adverse effects (e.g. respiratory depression) can hasten death. Sedation may be needed for agitation or distress and can be administered as continuous deep sedation (also referred to as terminal or palliative sedation) generally using benzodiazepines. However, for some patients these interventions are not enough, and others may express a clear desire to be completely unconscious as they die. We summarise the historical background of an established practice that we refer to as ‘general anaesthesia in end‐of‐life care’. We discuss its contexts and some ethical and legal issues that it raises, arguing that these are largely similar issues to those already raised by continuous deep sedation. To be a valid option, general anaesthesia in end‐of‐life care will require a clear multidisciplinary framework and consensus practice guidelines. We see these as an impending development for which the specialty should prepare. General anaesthesia in end‐of‐life care raises an important debate about the possible role of anaesthesia in the relief of suffering beyond the context of surgical/diagnostic interventions.

Clinical and ethical aspects of palliative sedation with propofol-A retrospective quantitative and qualitative study

BACKGROUND

The anesthetic propofol is often mentioned as a drug that can be used in palliative sedation. The existing literature of how to use propofol in palliative sedation is scarce, with lack of information about how propofol could be initiated for palliative sedation, doses and treatment outcomes.

AIM

To describe the patient population, previous and concomitant medication, and clinical outcome when propofol was used for palliative sedation.

METHODS

A retrospective study with quantitative and qualitative data. All patients who during a 4.5-year period received propofol for palliative sedation at the Department of palliative medicine, Akershus University Hospital, Norway were included.

RESULTS

Fourteen patients were included. In six patients the main indication for palliative sedation was pain, in seven dyspnoea and in one delirium. In eight of these cases propofol was chosen because of the pharmacokinetic properties (rapid effect), and in the remaining cases propofol was chosen because midazolam in spite of dose titration failed to provide sufficient symptom relief. In all patients sedation and adequate symptom control was achieved during manual dose titration. During the maintenance phase three of 14 patients had spontaneous awakenings. At death, propofol doses ranged from 60 to 340 mg/hour.

CONCLUSIONS

Severe suffering at the end of life can be successfully treated with propofol for palliative sedation. This can be performed in palliative medicine wards, but skilled observation and dose titration throughout the period of palliative sedation is necessary. Successful initial sedation does not guarantee uninterrupted sedation until death.

EDITORIAL COMMENT

In palliative care, some patients at the end of life can reach a stage where there have been maximal analgesic and or anxiolytic treatments though without achieving comfort in the awake state. This report describes and discusses use of propofol in these infrequent cases to relieve suffering as part of palliative care.

Propofol for palliative sedation

Palliative sedation is the intentional use of sedatives to manage refractory symptom(s), such as pain and/or terminal restlessness. This case report describes the successful use of propofol, an ultra-fast-acting anaesthetic agent commonly used for anaesthesia induction and maintenance to manage refractory agitated delirium in an acute inpatient palliative medicine setting.

A Review of Agents for Palliative Sedation/Continuous Deep Sedation: Pharmacology and Practical Applications

Continuous deep sedation at the end of life is a specific form of palliative sedation requiring a care plan that essentially places and maintains the patient in an unresponsive state because their symptoms are refractory to any other interventions. Because this application is uncommon, many providers may lack practical experience in this specialized area and resources they can access are outdated, nonspecific, and/or not comprehensive. The purpose of this review is to provide an evidence- and experience-based reference that specifically addresses those medications and regimens and their practical applications for this very narrow, but vital, aspect of hospice care. Patient goals in a hospital and hospice environments are different, so the manner in which widely used sedatives are dosed and applied can differ greatly as well. Parameters applied in end-of-life care that are based on experience and a thorough understanding of the pharmacology of those medications will differ from those applied in an intensive care unit or other medical environments. By recognizing these different goals and applying well-founded regimens geared specifically for end-of-life sedation, we can address our patients' symptoms in a more timely and efficacious manner.

Pediatric palliative sedation therapy with propofol: recommendations based on experience in children with terminal cancer

BACKGROUND

The use of propofol for palliative sedation of children is not well documented.

OBJECTIVE

Here we describe our experience with the use of propofol palliative sedation therapy (PST) to alleviate intractable end-of-life suffering in three pediatric oncology patients, and propose an algorithm for the selection of such candidates for PST.

PATIENTS AND METHODS

We identified inpatients who had received propofol PST within 20 days of death at our institution between 2003 and 2010. Their medical records were reviewed for indicators of pain, suffering, and sedation from 48 hours before PST to the time of death. We also tabulated consumption of opioids and other symptom management medications, pain scores, and adverse events of propofol, and reviewed clinical notes for descriptors of suffering and/or palliation.

RESULTS

Three of 192 (1.6%) inpatients (aged 6-15 years) received propofol PST at the end of life. Consumption of opioids and other supportive medications decreased during PST in two cases. In the third case, pain scores remained high and sedation was the only effective comfort measure. Clinical notes suggested improved comfort and rest in all patients. Propofol infusions were continued until the time of death.

CONCLUSIONS

Our experience demonstrates that propofol PST is a useful palliative option for pediatric patients experiencing intractable suffering at the end of life. We describe an algorithm that can be used to identify such children who are candidates for PST.

Propofol

Therapeutic Reviews aim to provide essential independent information for health professionals about drugs used in palliative and hospice care. The content is also available on www.palliativedrugs.com and will feature in future editions of the Hospice and Palliative Care Formulary USA and its British and Canadian counterparts. The series editors welcome feedback on the articles (hq@palliativedrugs.com).

Propofol for terminal sedation in palliative care: a systematic review

INTRODUCTION

We undertook a systematic review of published evidence of the effectiveness of propofol for terminal sedation. INCLUSIONS: Prospective or retrospective trials (controlled or uncontrolled) or case series of propofol for sedation in advanced incurable disease in either generalist setting or specialist palliative care units.

EXCLUSIONS

Use in anesthetic or intensivist settings (e.g., intensive care units); pediatric use. Identification of relevant studies: Using the search terms: [Hospice Care/OR Terminal Care/OR Palliative Care/OR palliative.mp] AND [Propofol/]. Studies were identified using a detailed search strategy from a number of electronic databases: Embase (1988-2005); MEDLINE (1966-2005) Cinahl (1982-2005), Cancerlit (1962-2005) The Cochrane Database of Systematic Reviews 2005 Issue 4. Hand searches of a number of palliative care journals were also undertaken (Palliative Medicine, Journal of Pain and Symptom Management, Progress in Palliative Care, Journal of Palliative Care, Journal of Palliative Medicine). No restriction was placed on the language of the original article.

RESULTS

Four articles--all case series or case reports--reporting generally favorable reports of the use of propofol as sedation for intractable symptoms in the last days of life especially when one or more other drugs have failed. Since these four articles are essentially hypothesis-generating, the article also discusses the possibility of the design of a clinical trial to compare propofol with other drugs used in this situation.

European Association for Palliative Care (EAPC) recommended framework for the use of sedation in palliative care

The European Association for Palliative Care (EAPC) considers sedation to be an important and necessary therapy in the care of selected palliative care patients with otherwise refractory distress. Prudent application of this approach requires due caution and good clinical practice. Inattention to potential risks and problematic practices can lead to harmful and unethical practice which may undermine the credibility and reputation of responsible clinicians and institutions as well as the discipline of palliative medicine more generally. Procedural guidelines are helpful to educate medical providers, set standards for best practice, promote optimal care and convey the important message to staff, patients and families that palliative sedation is an accepted, ethical practice when used in appropriate situations. EAPC aims to facilitate the development of such guidelines by presenting a 10-point framework that is based on the pre-existing guidelines and literature and extensive peer review.

High-Dose Propofol Drip for Palliative Sedation: A Case Report

Oftentimes, patients at the end of life may present with challenging symptoms refractory to conventional therapies. Agitation and terminal restlessness, 2 common symptoms encountered in the hospice population, are frequently managed using benzodiazepines or typical antipsychotics. In clinical scenarios that either preclude their use or in which they prove ineffective, alternative pharmacotherapy must be considered. Propofol, a sedative-hypnotic unrelated to any other class of drug, may provide palliation of agitation and terminal restlessness refractory to benzodiazepines or antipsychotics. Here, the authors present a hospice patient admitted to the general medical floor of a small community hospital for pain and symptom management. A history of polysubstance abuse contributes to rapidly escalating doses of opioids and midazolam. Failure to control her symptoms resulted in the initiation and successful titration of propofol.

Propofol use in pediatric patients with severe cancer pain at the end of life

This article describes the use and effectiveness of adjuvant propofol for pain control for pediatric oncology patients at the end of life. All patients experienced severe pain and agitation, not well controlled by continuous infusion opioids and benzodiazepines. Upon starting propofol, most patients had a temporary stabilization in the dose of opioids with subjective improvement in pain control, increased alertness, and improved ability to interact. Propofol infusions were continued until death in most patients. Two patients received propofol infusions at home. Subsequent increases in opioids in 6 patients and propofol in all patients were required for optimal pain control. Adverse effects included agitation in 5 patients and hallucinations in 2, which were controllable with benzodiazepines. One patient developed severe tetany, requiring propofol interruption; propofol was successfully restarted at a lower dose with an adjuvant benzodiazepine. The authors conclude that propofol is a useful and tolerable adjuvant agent for pain management in pediatric oncology patients at the end of life. It is a useful adjuvant if pain is unresponsive to continuous infusion opioids or if rapidly escalating doses of opioids are required.

Palliative Sedation Therapy in the Last Weeks of Life: A Literature Review and Recommendations for Standards

PURPOSE

Palliative sedation therapy (PST) is a controversial issue. There is a need for internationally accepted definitions and standards.

METHODS

A systematic review of the literature was performed by an international panel of 29 palliative care experts. Draft papers were written on various topics concerning PST. This paper is a summary of the individual papers, written after two meetings and extensive e-mail discussions.

RESULTS

PST is defined as the use of specific sedative medications to relieve intolerable suffering from refractory symptoms by a reduction in patient consciousness, using appropriate drugs carefully titrated to the cessation of symptoms. The initial dose of sedatives should usually be small enough to maintain the patients' ability to communicate periodically. The team looking after the patient should have enough expertise and experience to judge the symptom as refractory. Advice from palliative care specialists is strongly recommended before initiating PST. In the case of continuous and deep PST, the disease should be irreversible and advanced, with death expected within hours to days. Midazolam should be considered first-line choice. The decision whether or not to withhold or withdraw hydration should be discussed separately. Hydration should be offered only if it is considered likely that the benefit will outweigh the harm. PST is distinct from euthanasia because (1) it has the intent to provide symptom relief, (2) it is a proportionate intervention, and (3) the death of the patient is not a criterion for success. PST and its outcome should be carefully monitored and documented.

CONCLUSION

When other treatments fail to relieve suffering in the imminently dying patient, PST is a valid palliative care option.

Sedation for the care of patients with advanced cancer

Sedation in the context of palliative medicine is the monitored use of medications to induce varying degrees of unconsciousness to bring about a state of decreased or absent awareness (i.e. unconsciousness) in order to relieve the burden of otherwise intractable suffering. Sedation is used in palliative care in several settings: transient controlled sedation, sedation in the management of refractory symptoms at the end of life, emergency sedation, respite sedation, and sedation for refractory psychological or existential suffering. Sedation is controversial in that it diminishes the capacity of the patient to interact, function, and, in some cases, live. There is no distinct ethical problem in the use of sedation to relieve otherwise intolerable suffering in patients who are dying. Since all medical treatments involve risks and benefits, each potential option must be evaluated for its promise with regards to achieving the goals of care. When risks of treatment are involved, to be justified these risks must be proportionate to the gravity of the clinical indication. Some aspects of management, such as the need for hydration in patients undergoing sedation and the use of sedation in the management of psychological and spiritual suffering, remain controversial.

When nothing helps: propofol as sedative and antiemetic in palliative cancer care

Benzodiazepines, neuroleptics, and barbiturates are commonly used for sedation to achieve symptom control in end-of-life care. Propofol has several advantages over traditional sedating agents that would indicate its use in treatment-refractory situations. We report on the use of propofol in 35 patients. In 22 patients, propofol was used for palliative sedation when treatment with benzodiazepines had failed. The mean dose range during treatment was between 0.90 and 2.13 mg/kg/h. The effect was assessed as good or very good in 91% of the patients. Thirteen patients were treated with propofol due to intractable nausea and vomiting. The mean dose range during the infusion period was 0.67-1.01 mg/kg/h. The effect was judged as good or very good in 69% of the patients. Based on our experience, we propose clinical guidelines on the safe use of propofol in specialized palliative inpatient units.

The delirium subtypes: A review of prevalence, phenomenology, pathophysiology, and treatment response

Delirium is a highly prevalent disease in the elderly and postoperative, cancer, and AIDS patients. However it is often misdiagnosed and mistreated. This may be partly due to the inconsistencies of the diagnosis itself. Delirium is best defined currently by an association of cognitive impairment and arousal disturbance. Three subtypes (hyperactive, hypoactive, mixed) receive a definition in the literature, but those definitions may vary from author to author according to the importance they give either to the motoric presentation of the delirium or to the arousal disturbance. Our aim is to point out the inconsistencies we found in the literature, but also to identify different paths that have been explored to solve them, that is, the suggestion to emphasize the arousal disturbances in defining the subtypes instead of the motoric presentations, which seem to be more fluctuating, and because of the fluctuating course of the disease to extend the observation over a period of time, which may improve the accuracy of the diagnosis. This is not without importance from a clinical standpoint. Subtypes of delirium may be explained by different pathophysiologic mechanisms, which remain partly unexplained, and may respond to specific treatments. There is a trend to isolate core symptoms (disorientation, cognitive deficits, sleep–wake cycle disturbance, disorganized thinking, and language abnormalities) so as to distinguish them from secondary symptoms that may be correlated with the different etiologies. Our contribution is also to challenge, with new data, the accepted belief that psychotic features are quite rare in the hypoactive type of delirium. We demonstrate that delusions and perceptual disturbances, although less frequent, are present in more than half of the patients with hypoactive delirium. The psychotic features are clearly correlated with a highly prevalent rate of patients', spouses', and caregivers' distress. The mixed subtype of delirium seems to have the worst prognosis, the hyperactive showing the best prognosis. The treatment of the agitated delirious patient is also more consensual. Haloperidol remains the gold standard in the treatment of delirium regardless of the clinical presentation, but the literature provides several alternatives that may prove more specific and have less adverse effects (atypical antipsychotics, psychostimulants, anesthetics).

Sedation for the relief of refractory symptoms in the imminently dying: A fine intentional line

There is a continuum of the goals of comfort and function in palliative care that begins with comfort and function being equal priorities and sedation being unacceptable. As disease progresses, the goals and preferences of the patient turn to coping with the loss of function caused by the disease and acceptance of unintentional sedation from the disease, its therapies, or symptom relief interventions. As patients approach the end of life, they may need intentional sedation for the relief of refractory symptoms. Such sedation can be divided into three categories: routine, infrequent, and extraordinary with respect to the frequency, difficulty, and risks involved with the drugs and routes of administration required to induce and maintain a level of sedation that relieves the patient's physical and existential symptoms. Extraordinary sedation with continuous infusions of midazolam, thiopental, and propofol can relieve refractory symptoms in most patients in their final days of life. Palliative care clinicians should become comfortable with the ethical justification and technical expertise needed to provide this essential, extraordinary care to the small but deserving number of patients in whom routine and infrequent sedation does not adequately relieve their suffering.

Practical guide to palliative sedation

Terminally ill patients want assurance that their symptoms will be controlled as death approaches. Most patients can have a peaceful death with standard palliative care. Some patients approaching death, however, have refractory symptoms such as pain, dyspnea, nausea, and agitated delirium. Palliative sedation (PS), the use of medications to induce sedation in order to control refractory symptoms near death, is a therapeutic option for these patients. The reported frequency of PS use varies greatly, ranging from 5% to 52% of the terminally ill. One concern with PS is its effect on survival. Data suggest that PS does not lead to immediate death, with the median time to death after initiating PS being greater than 1 to 5 days. A number of medications have been used for PS, but midazolam is most commonly reported. PS is distinct from euthanasia because the intent of PS is relief from suffering without death as a required outcome.

When midazolam fails

Significant distress is experienced by patients, families, and caregivers when a symptom or disorder, such as an agitated delirium, becomes an intractable, or a catastrophic event, such as irreversible stridor. When palliative sedation is indicated for these patients, midazolam is usually the preferred drug. In some cases, however, midazolam fails to provide adequate sedation. Two cases are presented to illustrate this phenomenon and explore the possible mechanisms underlying this lack of response. These mechanisms appear to be multifaceted. The heterogeneity of the GABA(A) receptor complex and the alterations that this complex can undergo functionally can explain, to some degree, the diversity of the physiological and pharmacological outcomes. Other factors responsible for the diversity in response may include concomitant medications, age, concurrent disease, overall health status, alcohol use, liver disease, renal disease, smoking and hormonal status. Evidence-based guidelines on alternative treatment options should midazolam fail are required. In the interim, a lower threshold for adding an alternative drug, such as phenobarbital, or substituting midazolam with another drug, such as propofol, should be considered in these circumstances.

Effects of high dose opioids and sedatives on survival in terminally ill cancer patients

Concerns that high dose opioids and sedatives might shorten patient survival could contribute to insufficient symptom alleviation for terminally ill cancer patients. To examine the effects of opioids and sedatives prescribed in the final 48 hours on patient survival, a re-analysis of the prospectively collected data was performed on 209 hospice inpatients. Patient characteristics and clinical symptoms were prospectively recorded, and information about the use of opioids and sedatives in the last two days was collected by a chart review. Opioids were prescribed in 82% of the patients, with a median dose of 80 mg oral morphine equivalent (OME)/48 hours. Sixty percent received some sedative medications, mainly haloperidol (43% of total sample, 7.5 mg/48 hours), midazolam (23%, 23mg/48 hours), and hydroxyzine (15%, 50 mg/48 hours). There were no significant differences in survival between the patients who received different doses of opioids (<240, 240--599, and > or =600 mg OME/48 hours) and of benzodiazepines (0, 1--59, and > or =60 mg parental midazolam equivalent/48 hours). Also, the survival of patients with haloperidol, hydroxyzine, and other sedative medications did not differ from those without. Furthermore, an addition of use of opioids and sedatives in the final 48 hours into the multiple regression model for survival prediction achieved no significant increase in predictability. In conclusion, opioids and sedatives used for symptom control in the last days are not associated with patient survival. They are safe and useful medications to palliate severe distress in the terminal stage of cancer when administered with a low initial dosage and adequate titration.

Delirium in the terminally ill

Delirium is highly prevalent in terminally ill patients, especially in the last weeks of life, when some cognitive impairment develops in as many as 85% of patients. Delirium is associated with increased morbidity in terminally ill patients and can interfere with pain and symptom control. The cause of delirium is usually multifactorial and often cannot be found or reversed in dying patients. Nonpharmacologic and pharmacologic interventions are effective in controlling the symptoms of delirium in terminally ill patients. Haloperidol and other newer neuroleptics are safe and effective in eliminating delirium for some patients. In approximately one third of patients, delirium can be managed successfully only by providing sedation.

Sedation for intractable distress of a dying patient: acute palliative care and the principle of double effect

Shortly before his death in 1995, Kenneth B. Schwartz, a cancer patient at Massachusetts General Hospital (MGH), founded the Kenneth B. Schwartz Center at MGH. The Schwartz Center is a nonprofit organization dedicated to supporting and advancing compassionate health care delivery, which provides hope to the patient, support to caregivers, and encourages the healing process. The Center sponsors the Schwartz Center Rounds, a monthly multidisciplinary forum where caregivers reflect on important psychosocial issues faced by patients, their families, and their caregivers, and gain insight and support from fellow staff members. The case presented is of a young man dying of recurrent epithelioid hemangioendothelioma, distressed with stridor and severe pain, whose poorly controlled symptoms were successfully treated with an infusion of propofol, titrated to provide effective comfort in the last few hours of the patient's life. The tenet of double effect, which allows aggressive treatment of suffering in spite of foreseeable but unintended consequences, is reviewed. The patient's parents were invited and contributed to the Rounds, providing compelling testimony to the power of the presence of clinicians at the time of death and the importance of open communication about difficult ethical issues.

Ethical decisions in perioperative elder care

Settings involving the extremes of age and illness are the most complex in ethical deliberation and require sound principles that can be clearly applied to individual situations. This article discusses how one's view of the aging process effects clinical decision making. The basic principles of medical ethics (autonomy, beneficence, nonmaleficence, and justice) are discussed along with alternative ethical paradigms that may be more appropriate to the elderly population. Issues such as informed consent, do not resuscitate orders in the operating room, and controversies in end-of-life palliative care specifically impact the role of the anesthesiologist. Anesthesiologists, as medical professionals in a health care team, have a great stake in ethical decision making and the ethics of health care policy.

Pain Management in the Cancer Patient

Of the over one million patients diagnosed with cancer each year, 30 percent will have pain at diagnosis and up to 85 percent will have pain as their disease progresses. Adequate pain management continues to be hindered by multiple patient-and clinician-related barriers; however, with increased awareness and knowledge, the pharmacy practitioner can play a key role in facilitating pain management. This review will focus on the mechanisms of cancer pain, the role of non-opioids, opioids, and adjuvant agents in the treatment of cancer pain, and the basic principles of cancer pain management that allow 70 to 90 percent of patients to achieve excellent pain control.