Symptoms commonly experienced at the end of life include pain, delirium, dyspnea, and rattle. In a study of 200 patients with cancer, noisy breathing or rattle, pain, and urinary dysfunction were the symptoms experienced most frequently during the last 48 hours of life. In a large study of cancer patients evaluated with the Edmonton Symptom Assessment System, average scores for pain, nausea, anxiety, and depression remained relatively stable over the 6 months before death. However, shortness of breath, drowsiness, well-being, lack of appetite, and tiredness increased in severity over time, particularly in the month before death. Other studies confirm that pain, fatigue, cough, delirium, dyspnea, and other symptoms are common in the final days.[3,4,5];[Level of evidence: III];[7,8][Level of evidence: II] Less common but equally troubling symptoms that may occur in the final hours include fever and hemorrhage.
Pain During the Final Hours of Life
Many patients fear uncontrolled pain during the final hours of life, while others (including family members and some health care professionals) express concern that opioid use may hasten death. Experience suggests that most patients can obtain pain relief during the final hours of life and that very high doses of opioids are rarely indicated. Several studies refute the fear of hastened death associated with opioid use. In several surveys of high-dose opioid use in hospice and palliative care settings, no relationship between opioid dose and survival was found.[9,10,11,12]
Because consciousness may diminish during this time and swallowing becomes difficult, practitioners should anticipate alternatives to the oral route. In a study of cancer patients at 4 weeks, 1 week, and 24 hours before death, the oral route of opioid administration was continued in 62%, 43%, and 20% of patients, respectively. As patients approached death, the use of intermittent subcutaneous injections and intravenous or subcutaneous infusions increased. Both intravenous and subcutaneous routes are effective in delivering opioids and other agents in the inpatient or home setting. For patients who do not have a pre-existing access port or catheter, intermittent or continuous subcutaneous administration provides a painless and effective route of delivery. (Refer to the PDQ summary on Pain for a more complete review of parenteral administration of opioids and opioid rotation.)