Inhaled nitric oxide attenuates reperfusion inflammatory responses in humans

BACKGROUND: Reduced bioavailability of endothelium-derived nitric oxide associated with reperfusion could potentially exacerbate the inflammatory response during reperfusion. Evidence suggests the pharmacologic effects of inhaled nitric oxide may extend beyond the pulmonary vasculature, and this is attributed to nitric oxide-derived complexes in blood that ultimately orchestrate antiinflammatory effects. In this study, the authors evaluated the potential for inhaled nitric oxide (80 ppm) to attenuate inflammation instigated by ischemia-reperfusion in a human model using patients undergoing knee surgery where a tourniquet was used to produce a bloodless surgical field. METHODS: Inhaled nitric oxide (80 ppm) was administered before tourniquet application and continued throughout reperfusion until the completion of surgery. Venous blood samples were collected before and after reperfusion, for the measurements of nitrate and nitrite, CD11b/CD18, soluble P-selectin, and lipid hydroperoxide. Muscle biopsies were obtained from the quadriceps muscle before skin closure and analyzed for myeloperoxide, conjugated dienes, and nuclear factor-kappaB translocation. RESULTS: Administration of inhaled nitric oxide (80 ppm) significantly attenuated the inflammatory response characterized by reduced expression of CD11b/CD18, P-selectin, and nuclear factor kappaB compared with the control group. This was accompanied by increased plasma levels of nitrate and nitrite and reduced oxidative stress. CONCLUSIONS: Administration of inhaled nitric oxide at 80 ppm significantly reduces inflammation in lower extremity ischemia-reperfusion in humans. This observation supports the concept that during diseases characterized by dysfunction in nitric oxide metabolism, inhaled nitric oxide may be an effective therapy to replenish systemic nitric oxide, thus retarding inflammatory-mediated injury.     

Mitochondrial involvement in psychiatric disorders

Recent findings of mitochondrial abnormalities in brains from subjects with neurological disorders have led to a renewed search for mitochondrial abnormalities in psychiatric disorders. A growing body of evidence suggests that there is mitochondrial dysfunction in schizophrenia, bipolar disorder, and major depressive disorder, including evidence from electron microscopy, imaging, gene expression, genotyping, and sequencing studies. Specific evidence of dysfunction such as increased common deletion and decreased gene expression in mitochondria in psychiatric illnesses suggests that direct examination of mitochondrial DNA from postmortem brain cells may provide further details of mitochondrial alterations in psychiatric disorders.     

Novel ovine model of methicillin-resistant Staphylococcus aureus-induced pneumonia and sepsis

Methicillin-resistant Staphylococcus aureus (MRSA)-related pneumonia and/or sepsis are a frequent serious menace. The aim of the study was to establish a standardized and reproducible model of MRSA-induced septic pneumonia to evaluate new therapies. Sheep were operatively prepared for chronic study. After 5 days' recovery, tracheostomy was performed under anesthesia, and smoke injury was induced by inhalation of cotton smoke (48 breaths, <40 degrees C). Methicillin-resistant S. aureus (AW6) (approximately 2.5x10(11) colony-forming units) was instilled into the airway by a bronchoscope. After the injury, animals were awakened and maintained on mechanical ventilation by 100% oxygen for first 3 h, and thereafter, oxygen concentration was adjusted according to blood gases. The sheep were resuscitated by lactated Ringer solution with an initial rate of 2 mL kg(-1) h(-1) that was further adjusted according to hematocrit. Study groups include (1) sham (noninjured, nontreated; n=6), (2) S+MRSA (exposed to smoke inhalation and MRSA, nontreated; n=6), and (3) smoke (exposed to smoke inhalation alone; n=6). Injured (S+MRSA) animals showed the signs of severe sepsis-related multiple organ failure 3 h after insult. Cardiovascular morbidity was evidenced by severe hypotension, with increased heart rate, cardiac output, left atrial pressure and severely decreased systemic vascular resistance index, and left ventricle stroke work index. Pulmonary dysfunction was characterized by deteriorated gas exchange (PaO2/FIO2 and pulmonary shunt) and increased ventilatory pressures. The S+MRSA group showed significantly greater lung tissue water content, myeloperoxidase activity, and cytokine production compared with uninjured sham animals. Microvascular hyperpermeability was evidenced by marked fluid retention (fluid net balance), decreased plasma protein with decreased plasma oncotic pressure, and increased pulmonary microvascular pressure. All these changes were accompanied by 6- to 7-fold increase in plasma nitrite/nitrate and increased production of reactive nitrogen species in lung. The smoke inhalation alone had a little or no effect on these variables. This model closely mimics hyperdynamic human sepsis. The excessive production of NO may be extensively involved in the pathogenic process.     

Chronic pain related to first bite syndrome: report of two cases

First bite syndrome is the classic symptomatology of pain in the parotid region that occurs in response to the first bite of a meal. We report two cases of this syndrome in patients after operations to the parapharyngeal space.     

Pregnancy after bariatric surgery: Consensus recommendations for periconception,antenatal and postnatal care

The objective of the study is to provide evidence‐based guidance on nutritional management and optimal care for pregnancy after bariatric surgery. A consensus meeting of international and multidisciplinary experts was held to identify relevant research questions in relation to pregnancy after bariatric surgery. A systematic search of available literature was performed, and the ADAPTE protocol for guideline development followed. All available evidence was graded and further discussed during group meetings to formulate recommendations. Where evidence of sufficient quality was lacking, the group made consensus recommendations based on expert clinical experience. The main outcome measures are timing of pregnancy, contraceptive choice, nutritional advice and supplementation, clinical follow‐up of pregnancy, and breastfeeding. We provide recommendations for periconception, antenatal, and postnatal care for women following surgery. These recommendations are summarized in a table and print‐friendly format. Women of reproductive age with a history of bariatric surgery should receive specialized care regarding their reproductive health. Many recommendations are not supported by high‐quality evidence and warrant further research. These areas are highlighted in the paper.     

Pain assessment in intellectually disabled people: non-verbal indicators

BACKGROUND: Although important progress has been made during the past decade, research on pain in people with intellectual disabilities is still scarce. Pain assessment in people with intellectual disabilities is a frequent and difficult problem, especially for nurses working with people with intellectual disabilities on a daily basis. Gathering more information about pain in people with intellectual disabilities is of major importance and relevance for nursing, and adds to the developing body of knowledge. OBJECTIVE: To investigate the nature and relative importance of non-verbal indicators used by nurses to assess pain in people with a severe or profound intellectual disability. METHODS: A questionnaire consisting of 158 indicators of pain was used. A total of 135 nurses from nine institutions specializing in the care of people with intellectual disability were asked to rate each indicator on a scale of 1-10 to show which non-verbal expressions they considered important in diagnosing pain. RESULTS: A total of 109 nurses responded. All 158 indicators were mentioned as being important to indicate pain. All except four had a range of 9. Seven (moaning during manipulation, crying during manipulation, painful facial expression during manipulation, swelling, screaming during manipulation, not using (affected) body part, and moving the body in a specific way of behaving) were reported as 'very important' by more than 50% of nurses. The lowest score (median 5.5; minimum 1, maximum 10) was given to the indicator 'waving arm movements'. The pain of people with severe intellectual disability appeared to be assessed differently from that of people with profound intellectual disability. Indicators belonging to the 'physiological' category scored relatively higher in the group of nurses specializing in profound disability. In contrast, indicators belonging to the 'social-emotional' category were scored relatively higher by nurses specializing in severe disability. CONCLUSION: Nurses used a wide range of indicators to assess pain in people with intellectual disability. Functional abilities and level of disability seem to influence the indicators used.     

Resident-oriented care in nursing homes: effects on nurses

Background.  In a resident-oriented care model the assignment of patients to primary nurses takes place. These primary nurses are responsible for the total nursing care of their patients and make use of the nursing process. According to job demand-control models, these enlarged and enriched jobs can be described in terms of autonomy, job demands and social support, and the presence of these work characteristics has a positive influence on workers' psychological and behavioural outcomes.
Aims.  This paper reports a study to investigate the extent to which the various features of resident-oriented care were implemented and its effects nurses' on work characteristics and on psychological and behavioural outcomes in three Dutch nursing homes.
Methods.  In a quasi-experimental design, experimental and control groups were followed over 22 months, using a pretest and two post-tests with questionnaires, interviews and qualitative observations.
Results.  The quantitative data showed significant increases in resident assignment, the two variables measuring the nursing process and, in the psycho-geriatric experimental group, on resident-oriented tasks. The qualitative data showed that a partly task-oriented division of labour was still used and that the planned delegation of coordination tasks to primary nurses was not fully achieved. Effects on work perceptions were limited. After implementation of the new system, the experimental group showed an increase in job autonomy.
Conclusions.  The intervention appeared to be only partly successful. Most of the expected results regarding work characteristics and psychological and behavioural outcomes did not materialize. Theoretical and methodological reflections are presented in the light of these findings.     

Jordanian nursing students' knowledge of osteoporosis

The aim of this study was to explore baccalaureate nursing students' knowledge of osteoporosis for beginning practice in the community. A cross-sectional study design was used. Students were selected by convenience sampling ( n  = 85) from one University in Jordan in the final of 4 years. Students were asked to complete a 23-item-knowledge questionnaire based on two earlier published studies of osteoporosis. Results indicated poor level of knowledge of osteoporosis on all dimensions: prevention (11 items) 62.6%; SD 14.2; general (5 items) 59.5%; SD 20.6; and the pathophysiology (7 items) 39.6%; SD 15.6, and an overall mean grade of 54.9%; SD 10.3. This result provides information that graduating nursing students have limited knowledge to undertake the role of health promotion and disease prevention in the community.