Maintenance haemodialysis: patients' experiences of their life situation

Aim. The aim of this study was to examine how patients suffering from CKD on maintenance haemodialysis experience their life situation. The focus was on how treatment encroaches on time and space and how patients experience care. The rationale was that this knowledge is necessary to provide professional support that takes into consideration a person's whole life situation. Background. The experiences of patients with chronic kidney disease (CKD) undergoing maintenance haemodialysis have been studied in many quantitative studies, which translate patients’ subjective experiences into objectively quantifiable data. However, there are few qualitative studies examining the experiences of these patients’ life situation and expressing their experiences within the context of a nursing and caregiver's perspective. Method. Data were collected by interviews with 41 patients between the ages of 29 and 86 years who participated in the study. A content analysis was used to identify common themes that describe the patients’ experiences of their life situation. Results. Three main themes were identified, ‘not finding space for living’, ‘feelings evoked in the care situation’ and, ‘attempting to manage restricted life’. The first theme ‘not finding space for living’ consisted of two sub‐themes: ‘struggling with time‐consuming care’ and ‘feeling that life is restricted’. The second theme ‘feelings evoked in the care situation’ consisted of two sub‐themes: ‘sense of emotional distance’ and ‘feeling vulnerable’. Conclusions. The patients in this study indirectly expressed an existential struggle, indicating that encroachment of time and space were important existential dimensions of CKD. The findings indicated that caregivers were not always aware of this inducing a sense of emotional distance and a sense of vulnerability in the patients. Relevance to clinical practice. Caregivers in dialysis units have to consider haemodialysis patients’ experience of a sense of emotional distance in their relationship to caregivers. Nurses and doctors need to create routines within nursing practice to overcome this.     

Renal ontogeny of ifosfamide nephrotoxicity

Ifosfamide-induced nephrotoxicity adversely affects the health and well-being of children with cancer. We have recently shown age-dependent nephrotoxicity induced by ifosfamide, with younger children (<3 years) substantially more vulnerable. The mechanisms leading to this age-related ifosfamide-induced renal damage have not been identified. Underlying this work is the hypothesis that renal ontogeny is involved in the expression and activity of the cytochrome P450 (CYP) enzymes responsible for IF metabolism to the nephrotoxic chloroacetaldehyde. We evaluated renal CYP3A and 2B22 activity in pigs between the ages of 1 day and adulthood, as well as the metabolism of ifosfamide by renal microsomes to 2- and 3-dechloroethylifosfamide (2-DCEIF and 3-DCEIF, respectively). Kidney CYP3A messenger RNA expression peaked 15 to 60 days (0.7-76 +/- 0.19 CYP3A/actin ratio; P < 0.001). Subsequently, this level decreased to adult values (0.54 - 0.03 CYP3A/actin ratio; P = 0.04). Similarly, we detected an increase in the ifosfamide-metabolism rate between young (18 +/- 2 pmol/mg protein/min) and adult (12.2 +/- 0.17 pmol/mg protein/min) animals (P = 0.002). Ours is the first documentation of ontogeny of renal CYP3A and of renal ifosfamide metabolism. These data suggest that age-dependent ifosfamide nephrotoxicity is, at least in part, due to ontogeny in the production chloroacetaldehyde.     

Technique to Confirm Occlusal Contact Using an Articulating Paper Holder Equipped with Tongue Depressor

This technical report describes a simple procedure for verifying occlusal contact with the use of a new device that combines the functions of a tongue depressor and an articulating paper holder. Verifying occlusal contact and/or the maxillomandibular relationship record can be expected to be simpler and easier with this device compared to the conventional holder, especially for patients with tongue hypertrophy or obesity and those treated under general anesthesia, among others.     

Valproic acid increases susceptibility to endotoxin shock through enhanced release of high-mobility group box 1

High-mobility group box 1 (HMGB1) is a nuclear factor and a secreted protein. During inflammation, HMGB1 is secreted into the extracellular space where it can interact with the receptor for advanced glycation end products and trigger proinflammatory signals. Extracellular HMGB1 plays a critical role in several inflammatory diseases such as sepsis and rheumatoid arthritis. Valproic acid (VPA) is one of the most frequently prescribed antiepileptic drugs. The present study was undertaken to investigate the effect of VPA on secretion of HMGB1 in systemic inflammatory responses induced by lipopolysaccharide. Pretreatment with VPA increased the susceptibility of mice to lipopolysaccharide in endotoxemia. Valproic acid induced HMGB1 release and nuclear factor κB activation in RAW-blue cells. Valproic acid promoted the phosphorylation of ERK1/2 but not that of p38 or JNK. The MEK1/2 inhibitor PD98059 also suppressed HMGB1 release and activation of nuclear factor κB induced by VPA. Valproic acid induced expression of γ-aminobutyric acid receptors in macrophages, and picrotoxin, a γ-aminobutyric acid A receptor antagonist, inhibited the VPA-activated phosphorylation of ERK and VPA-induced HMGB1 release. These results suggest that VPA may exacerbate innate immune responses to endotoxin through enhanced release of HMGB1.