Economic perspectives on diagnosis and treatment planning in periodontology

Abstract Economic factors in diagnosis and treatment planning in periodontology may be considered from several points of view. A first perspective is that of government responsibility. Because of the explosion in health care expenditure in the last decade, public funding of dental care programmes may become static or even reduced. Most governments try to curb the ever growing public health expenditure. Consequently, terms like effectiveness, efficiency and accountability are now becoming common words also in relation to periodontal health care. Moreover, private insurance companies, which have entered this area, may be individual patient who, explicitly or implicitly, would like to consider the services individual patient, who explicitly or implicitly, would like to consider the sendees rendered in periodontal therapy and prevention as cost-effective. Features of supply of and demand for care on an individual basis should also be considered. Finally, the periodontist or general practitioner has to consider economic factors. In professional life, there should be a balance between good working conditions providing satisfactory care, and the demands and priorities of individual patients and the community at large.     

Adrenoceptors and Colocolonic Inhibitory Reflex

The colocolonic inhibitory reflex ischaracterized by inhibition of proximal colonic motilityinduced by distal colonic distension. The aim of thisstudy was to investigate the underlying neuralmechanisms of this reflex, in vivo , using an isolatedloop of canine colon. In five beagle dogs, motility wasrecorded from an exteriorized colonic loop via a serosalstrain gauge connected to a digital data logger and chart recorder. Inflation of a balloon inthe distal colon resulted in inhibition of motility inthe isolated loop. Inhibition of motor activitypersisted following injection of propranolol (100g/kg intravenously), a -adrenoceptorantagonist, but was abolished following administrationof the ₂-adrenoceptor antagonistyohimbine (200 g/kg intravenously). This studyconfirms that the colocolonic inhibitory reflex is mediatedvia the extrinsic nerves to the colon. As the reflex wasabolished by ₂-, but not-adrenoceptor blockade, this indicates that thereflex pathway involves₂-adrenoceptors.     

Growing Region Segmentation Software (GRES) for quantitative magnetic resonance imaging of multiple sclerosis: intra- and inter-observer agreement variability: a comparison with manual contouring method

Lesion area measurement in multiple sclerosis (MS) is one of the key points in evaluating the natural history and in monitoring the efficacy of treatments. This study was performed to check the intra- and inter-observer agreement variability of a locally developed Growing Region Segmentation Software (GRES), comparing them to those obtained using manual contouring (MC). From routine 1.5-T MRI study of clinically definite multiple sclerosis patients, 36 lesions seen on proton-density-weighted images (PDWI) and 36 enhancing lesion on Gd-DTPA-BMA-enhanced T1-weighted images (Gd-T1WI) were randomly chosen and were evaluated by three observers. The mean range of lesion size was 9.9-536.0 mm(2) on PDWI and 3.6-57.2 mm(2) on Gd-T1WI. The median intra- and inter-observer agreement were, respectively, 97.1 and 90.0% using GRES on PDWI, 81.0 and 70.0% using MC on PDWI, 88.8 and 80.0% using GRES on Gd-T1WI, and 85.8 and 70.0% using MC on Gd-T1WI. The intra- and inter-observer agreements were significantly greater for GRES compared with MC ( P<0.0001 and P=0.0023, respectively) for PDWI, while no difference was found between GRES an MC for Gd-T1WI. The intra-observer variability for GRES was significantly lower on both PDWI ( P=0.0001) and Gd-T1WI ( P=0.0067), whereas for MC the same result was found only for PDWI ( P=0.0147). These data indicate that GRES reduces both the intra- and the inter-observer variability in assessing the area of MS lesions on PDWI and may prove useful in multicentre studies.     

The Ontario Cardiac Rehabilitation Pilot Project: Recommendations for health planning and policy

BACKGROUND: Expansion of cardiac rehabilitation (CR) could save both lives and costs by reducing illness and use of health care services. In February 2001, the Ontario Ministry of Health and Long-Term Care (the Ministry) announced a pilot project (the Pilot) to implement and evaluate a comprehensive, multifactoral model of CR service delivery at 17 centres across Ontario. OBJECTIVES: To design, coordinate and evaluate a coordinated model of CR service delivery, and to collect and evaluate an extensive set of clinical and administrative data. METHODS AND RESULTS: The Pilot was a large, province-wide observational investigation of a health service delivery model for CR and secondary prevention care. The present paper is the third in a three-part, policy-related series. In the present paper, the results of the evaluation of the service delivery model and the final health policy recommendations that were made to the Ministry in September 2002 are presented. CONCLUSIONS: Within approximately one year, 4922 patients were enrolled in the Pilot at participating sites throughout Ontario; 88% of sites implemented all elements of the comprehensive services model, either on-site or through internal/external partnerships, and 94% of sites implemented the multidisciplinary Pilot staffing model. Based on this rapid and near-total implementation of the Pilot model, it was concluded that the Pilot model of care was generalizable. Furthermore, regional coordination was achieved through operationalization of the coordinating centres' roles in quality management, regional planning and program development, education and outreach.     

Entering a World with No Future: A phenomenological study describing the embodied experience of time when living with severe incurable disease

Scand J Caring Sci; 2013; 27; 165–174 A phenomenological study describing the embodied experience of time when living with severe incurable disease This article presents findings from a phenomenological study exploring experience of time by patients living close to death. The empirical data consist of 26 open‐ended interviews from 23 patients living with severe incurable disease receiving palliative care in Norway. Three aspects of experience of time were revealed as prominent: (i) Entering a world with no future; living close to death alters perception of and relationship to time. (ii) Listening to the rhythm of my body, not looking at the clock; embodied with severe illness, it is the body not the clock that structures and controls the activities of the day. (iii). Receiving time, taking time; being offered – not asked for – help is like receiving time that confirms humanity, in contrast to having to ask for help which is like taking others time and thereby revealing own helplessness. Experience of time close to death is discussed as an embodied experience of inner, contextual, relational dimensions in harmony and disharmony with the rhythm of nature, environment and others. Rhythms in harmony provide relief, while rhythms in disharmony confer weakness and limit time.     

Response of the Human Gastrointestinal Tract to Erythromycin

Erythromycin has been shown to increase gastrointestinal motility in dogs when given in large doses, whereas small doses of the antibiotic elicit a premature migrating motor complex (MMC) in both dogs and humans. To study the effects of therapeutic doses of erythromycin in humans, erythromycin was given to 14 human volunteers either intravenously, 7 mg (kg · 30 min), or orally (500 mg) and pressure recordings were made from perfused or solid state catheters. Migrating motor complexes were counted before and after erythromycin administration. Intravenously administered erythromycin caused a large increase in the amplitude, duration, and frequency of gastric contractions whereas the small bowel appeared to be inhibited. No MMC was observed after the onset of the intravenous infusion. After oral administration of erythromycin the number of MMC increased significantly. Erythromycin caused side effects in 71% of subjects. In conclusion, at therapeutic doses erythromycin causes a disturbance of human upper gastrointestinal motility and can prove a useful tool in motility studies.     

Involvement of 5-Hydroxytryptamine in Canine Intestinal Motility Patterns

Fasting activity seen as migrating myoelectric complexes and postprandial activity was recorded from eight conscious dogs with monopolar electrodes implanted on the serosa of the small bowel. A basal period was recorded, after which the 5-hydroxytryptamine (5-HT) antagonists methysergide, ketanserin, ICS 205–930, cyproheptadine, or MDL 72222 were administered by intravenous infusion. In other fasted experiments the same antagonists were administered in combination with a 5-HT infusion. Ketanserin did not change the fed or fasted pattern in the intestine. Methysergide induced irregular spiking activity at all electrode sites in both preprandial and postprandial experiments which continued to the end of recording. Cyproheptadine prevented the distal propagation of phase III of the complex beyond the jejunum. Antagonists of the 5-HT₃ receptor abolished phase II of the complex in some experiments. In postprandial experiments these antagonists increased the spiking activity recorded. 5-HT itself produced irregular spiking, which in the proximal electrodes only was reduced by concurrent ketanserin administration. These data indicate a role for endogenous 5-HT in the production of phase II of the migrating myoelectric complex and in its distal migration. The stimulatory action of 5-HT in the proximal intestine is mediated by 5-HT₂ receptors. Distally 5-HT₃ receptors can play an inhibitory role in the contractile response.     

Retransfusion of filtered shed blood in primary total hip and knee arthroplasty: a prospective randomized clinical trial

BACKGROUND: Allogeneic blood transfusions are associated with a number of well-recognized risks and complications. Postoperative retransfusion of filtered shed blood is an alternative to (reduce) allogeneic blood transfusion. The objectives of this study were to evaluate the clinical efficacy of retransfusion of filtered shed blood and to evaluate the complications, in particular febrile reactions. STUDY DESIGN AND METHODS: In this clinical trial 160 patients undergoing primary total hip or knee replacement were randomly assigned to receive either a retransfusion system (Bellovac, AstraTech AB) or a regular drain (Abdovac, AstraTech AB). Patients with a preoperative hemoglobin (Hb) level of between 13.0 and 14.6 g per dL were included. The shed blood was returned 6 hours after operation. After surgery the anesthesiologist determined the transfusion trigger. When Hb level dropped below this trigger, an allogeneic blood transfusion was given. The following data were obtained: number of allogeneic blood transfusions, total volume of blood collected in the bag used for retransfusion, perioperative Hb levels, febrile reaction, and other complications. RESULTS: In the control group 19 percent of the patients received at least one allogeneic blood transfusion. In the study group this percentage was 6 percent of the patients (p = 0.015). Comparing total knee and total hip arthroplasty (control vs. study) the percentages were, respectively, 16 percent versus 2 percent (p = 0.040) and 21 percent versus 11 percent (NS). On average 308 mL of filtered shed blood was retransfused in the study group. In the study group 18 percent of patients had febrile reactions compared to 20 percent in the control group. CONCLUSION: Postoperative retransfusion of filtered shed blood is effective for decreasing allogeneic blood transfusions after total hip and knee arthroplasty. There was no relationship between retransfusions and postoperative febrile reactions.