L. van Zuylen

Artificial nutrition and hydration in the last week of life in cancer patients. A systematic literature review of practices and effects

BACKGROUND The benefits and burdens of artificial nutrition (AN) and artificial hydration (AH) in end-of-life care are unclear. We carried out a literature review on the use of AN and AH in the last days of life of cancer patients. MATERIALS AND METHODS We systematically searched for papers in PubMed, CINAHL, PsycInfo and EMBASE. All English papers published between January 1998 and July 2009 that contained data on frequencies or effects of AN or AH in cancer patients in the last days of life were included. RESULTS Reported percentages of patients receiving AN or AH in the last week of life varied from 3% to 53% and from 12% to 88%, respectively. Five studies reported on the effects of AH: two found positive effects (less chronic nausea, less physical dehydration signs), two found negative effects (more ascites, more intestinal drainage) and four found also no effects on terminal delirium, thirst, chronic nausea and fluid overload. No study reported on the sole effect of AN. CONCLUSIONS Providing AN or AH to cancer patients who are in the last week of life is a frequent practice. The effects on comfort, symptoms and length of survival seem limited. Further research will contribute to better understanding of this important topic in end-of-life care.

Disposition of docetaxel in the presence of P-glycoprotein inhibition by intravenous administration of R101933

Recently, a study of docetaxel in combination with the new orally administered P-glycoprotein (P-gp) inhibitor R101933 showed that this combination was feasible. However, due to the low oral bioavailability of R101933 and high interpatient variability, no further attempts to increase the level of P-gp inhibition were made. Here, we assessed the feasibility of combining docetaxel with intravenously (i.v.) administered R101933, and determined the disposition of docetaxel with and without the P-gp inhibitor. Patients received i.v. R101933 alone at a dose escalated from 250 to 500 mg on day 1 (cycle 0), docetaxel 100 mg/m(2) as a 1-h infusion on day 8 (cycle 1) and the combination every 3 weeks thereafter (cycle 2 and further cycles). 12 patients were entered into the study, of whom 9 received the combination treatment. Single treatment with i.v. R101933 was associated with minimal toxicity consisting of temporary drowsiness and somnolence. Dose-limiting toxicity consisting of neutropenic fever was seen in cycles 1 and 2 or in further cycles at both dose levels. The plasma pharmacokinetics of docetaxel were not changed by the R101933 regimen at any dose level tested, as indicated by plasma clearance values of 22.5+/-6.2 l/h/m(2) and 24.2+/-7.4 l/h/m(2) (P=0.38) in cycles 1 and 2, respectively. However, the faecal excretion of unchanged docetaxel decreased significantly after the combination treatment from 2.5+/-2.1% to less than 1% of the administered dose of docetaxel, most likely due to inhibition of the intestinal P-gp by R101933. Plasma concentrations of R101933 were not different in cycles 0 or 2 and the concentrations achieved in the first 12-h period after i.v. infusion were capable of inhibiting P-gp in an ex vivo assay. We conclude that the combination of 100 mg/m(2) i.v. docetaxel and 500 mg i.v. R101933 is feasible, lacks pharmacokinetic interaction in plasma, and shows evidence of P-gp inhibition both in an ex vivo assay and in vivo as indicated by the inhibition of intestinal P-gp.

Pharmacokinetic considerations and recommendations in palliative care, with focus on morphine, midazolam and haloperidol

ABSTRACT Introduction: A variety of medications are used for symptom control in palliative care, such as morphine, midazolam and haloperidol. The pharmacokinetics of these drugs may be altered in these patients as a result of physiological changes that occur at the end stage of life. Areas covered: This review gives an overview of how the pharmacokinetics in terminally ill patients may differ from the average population and discusses the effect of terminal illness on each of the four pharmacokinetic processes absorption, distribution, metabolism, and elimination. Specific considerations are also given for three commonly prescribed drugs in palliative care: morphine, midazolam and haloperidol). Expert opinion: The pharmacokinetics of drugs in terminally ill patients can be complex and limited evidence exists on guided drug use in this population. To improve the quality of life of these patients, more knowledge and more pharmacokinetic/pharmacodynamics studies in terminally ill patients are needed to develop individualised dosing guidelines. Until then knowledge of pharmacokinetics and the physiological changes that occur in the final days of life can provide a base for dosing adjustments that will improve the quality of life of terminally ill patients. As the interaction of drugs with the physiology of dying is complex, pharmacological treatment is probably best assessed in a multi-disciplinary setting and the advice of a pharmacist, or clinical pharmacologist, is highly recommended.

Concordance between Experiences of Bereaved Relatives, Physicians, and Nurses with Hospital End-of-Life Care: Everyone Has Their “Own Truth”

When patients die relatives and healthcare professionals may appreciate the quality of the dying phase differently, but comparisons are rare. In a cross-sectional study (June 2009–July 2012) the experiences of bereaved relatives, physicians, and nurses concerning the quality of dying in a large Dutch university hospital were compared, and the relation to communication was explored. Measurements were concordance on the quality of dying (QOD) (0–10 scale), awareness of impending death, and end-of-life communication. Results. Data on all three perspectives were available for 200 patients. Concordance in general was poor. Relatives’ scores for QOD (median 7; IQR 5–8) were lower than physicians and nurses’ (both median 7; IQR 6–8) ( ). 48% of the relatives, 77% of the physicians, and 73% of the nurses had been aware of impending death. Physicians more often reported to have informed patients and relatives of end-of-life issues than relatives reported. When both physicians and relatives reported about such discussion, relatives’ awareness of impending death and presence at the patient’s deathbed were more likely. Conclusion. Relatives, physicians, and nurses seem to have their “own truth” about the dying phase. Professionals should put more emphasis on the collaboration with relatives and on verification of relative’s understanding.

Het effect van het Zorgpad voor de stervensfase op de inhoud van zorg in de laatste drie levensdagen

SamenvattingHet Zorgpad voor de stervensfase (ZS), is in Engeland ontwikkeld om de kennis en methode van terminale zorg vanuit het hospice over te brengen naar andere zorginstellingen.